1. A communication control method comprising: transmitting, by a second radio base station adjacent to a first radio base station, an attribute value relating to a second cell to the first radio base station, the second cell being under control of the second radio base station; receiving, by the first radio base station, the attribute value relating to the second cell; comparing, by the first radio base station, the attribute value relating to the second cell with an attribute value relating to a first cell, the first cell being under control of the first radio base station; and executing, by the first radio base station, processing for matching the attribute value relating to the second cell with the attribute value relating to the first cell in accordance with a predetermined criterion, when the received attribute value relating to the second cell is different from the attribute value relating to the first cell.

2. The communication control method according to Claim 1, wherein the attribute value includes at least one of handover permission/prohibition information, measurement permission/prohibition information, and load distribution control permission/prohibition information.

3. The communication control method according to Claim 1 or 2, wherein the attribute value relating to the second cell is added to information associated with a neighboring cell and is transmitted from the second radio base station to the first radio base station.

4. The communication control method according to any one of Claims 1 to 3, wherein when a communication mode for the first radio base station is different from a communication mode for the second radio base station, the attribute value is transmitted and received via a communication network to which the first radio base station and the second radio base station are connected.

5. The communication control method according to Claim 4, wherein the attribute value is transmitted and received during a control of local area network information.

6. The communication control method according to any one of Claims 1 to 5, wherein the attribute value is transmitted and received via a radio base station control device that controls a radio base station.

7. A communication control method comprising: acquiring an attribute value relating to a first cell under control of a first radio base station, and acquiring an attribute value relating to a second cell under control of a second radio base station; and matching the attribute value relating to the first cell with the attribute value relating to the second cell in accordance with a predetermined criterion, when the acquired attribute value relating to the first cell is different from the acquired attribute value relating to the second cell.

8. A radio communication system comprising: a first radio base station; and a second radio base station adjacent to the first radio base station, wherein the second radio base station comprises: means for transmitting, to the first radio base station, an attribute value relating to a second cell under control of the second radio base station, and the first radio base station comprises: means for receiving, by the first radio base station, the attribute value relating to the second cell; and means for matching the attribute value relating to the second cell with an attribute value relating to a first cell in accordance with a predetermined criterion, when the attribute value relating to the second cell is different from the attribute value relating to the first cell, the first cell being under control of the first radio base station.

9. A radio base station comprising: means for acquiring an attribute value relating to a first cell under control of a neighboring radio base station; and means for matching the attribute value relating to the first cell with an attribute value relating to a second cell in accordance with a predetermined criterion, when the acquired attribute value relating to the first cell is different from the attribute value relating to the second cell, the second cell being under control of the radio base station.

10. A non-transitory computer readable medium causing a computer to execute processing comprising: acquiring an attribute value relating to a first cell under control of a first radio base station, and acquiring an attribute value relating to a second cell under control of a second radio base station; and matching the attribute value relating to the first cell with the attribute value relating to the second cell in accordance with a predetermined criterion, when the acquired attribute value relating to the first cell is different from the acquired attribute value relating to the second cell.

COMMUNICATION CONTROL METHOD, RADIO COMMUNICATION
SYSTEM, RADIO BASE STATION, AND NON-TRANSITORY
COMPUTER READABLE MEDIUM
Technical Field
[0001]
The present invention relates to a method for controlling a base station between neighboring radio base stations.
Background Art
[0002]
With the explosive growth in demand for broadband multimedia communication services such as the Internet and video delivery, there has been progress made in the introduction of a radio communication system that employs a modulation method for transmitting a large volume of data. There is an increasing demand for LTE (Long Term Evolution) and the like as standards for high-speed communications that enable transmission of a large volume of data at once. In these communication modes, a handover technique for minimizing the discontinuity of communications even when a mobile terminal moves between neighboring cells covered by a radio base station is important. [0003]
Examples of handover failure include handover failure by a user that moves between cells, failure of load balancing (communication load distribution), and a handover to an unexpected cell. [0004]
Patent Literature 1 discloses a technique relating to a handover of a base station of a femtocell.
Patent Literature 2 discloses a general method for a base station to notify a communication terminal of blacklist information.
However, neither Patent Literature 1 nor Patent Literature 2 presents any solution for the cause of handover failure.

Citation List Patent Literature
[0005]
[Patent Literature 1] Japanese Unexamined Patent Application
Publication No. 2012-070074
[Patent Literature 2] Japanese Unexamined Patent Application
Publication No. 2010-171660
Non Patent Literature
[0006]
[Non Patent Literature 1] 3GPP TS 32.101 ver.11.0.0
[Non Patent Literature 2] 3GPP TS 32.423 ver.11.0.0
[Non Patent Literature 3] 3GPP TS 32.762 ver.11.0.0
[Non Patent Literature 4] 3GPP TS 36.300 ver.11.0.0
[Non Patent Literature 5] 3GPP TS 36.331 ver.10.4.0
[Non Patent Literature 6] 3GPP TS 36.423 ver.10.4.0
[Non Patent Literature 7] 3GPP TS 48.018 ver.10.4.0
Summary of Invention Technical Problem
[0007]
As described above, there is a problem that handover failure may occur due to failure in controlling neighboring radio base stations during a handover between cells of the neighboring radio base stations.
The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a communication control method, a radio communication system, a radio base station, and a non-transitory computer readable medium which prevent the problem of handover failure from occurring.
Solution to Problem
[0008]
A first exemplary aspect is a communication control method including: transmitting, by a second radio base station adjacent to a

first radio base station, an attribute value relating to a second cell to the first radio base station, the second cell being under control of the second radio base station; receiving, by the first radio base station, the attribute value relating to the second cell; comparing, by the first radio base station, the attribute value relating to the second cell with an attribute value relating to a first cell, the first cell being under control of the first radio base station; and executing, by the first radio base station, processing for matching the attribute value relating to the second cell with the attribute value relating to the first cell in accordance with a predetermined criterion, when the received attribute value relating to the second cell is different from the attribute value relating to the first cell. [0009]
A second exemplary aspect is a radio communication system including: a first radio base station; and a second radio base station adjacent to the first radio base station. The second radio base station includes means for transmitting, to the first radio base station, an attribute value relating to a second cell under control of the second radio base station. The first radio base station includes: means for receiving, by the first radio base station, the attribute value relating to the second cell; and means for matching the attribute value relating to the second cell with an attribute value relating to a first cell in accordance with a predetermined criterion, when the attribute value relating to the second cell is different from the attribute value relating to the first cell, the first cell being under control of the first radio base station. [0010]
A third exemplary aspect is a radio base station including: means for acquiring an attribute value relating to a first cell under control of a neighboring radio base station; and means for matching the attribute value relating to the first cell with an attribute value relating to a second cell in accordance with a predetermined criterion, when the acquired attribute value relating to the first cell is different from the attribute value relating to the second cell, the second cell being under

control of the radio base station. [0011]
A fourth exemplary aspect is a non-transitory computer readable medium causing a computer to execute processing including: acquiring an attribute value relating to a first cell under control of a first radio base station, and acquiring an attribute value relating to a second cell under control of a second radio base station; and matching the attribute value relating to the first cell with the attribute value relating to the second cell in accordance with a predetermined criterion, when the acquired attribute value relating to the first cell is different from the acquired attribute value relating to the second cell.
Advantageous Effects of Invention
[0012]
According to the present invention, it is possible to prevent occurrence of handover failure by controlling neighboring radio base stations during a handover of a mobile terminal between cells of neighboring radio base stations.
Brief Description of Drawings
[0013]
Fig. 1 is a diagram showing a configuration of nodes according to an exemplary embodiment of the present invention;
Fig. 2 is a block diagram showing a radio base station;
Fig. 3 shows information elements of a cell 101 which are transmitted from a radio base station 100 to a radio base station 103;
Fig. 4 shows information elements of a cell 102 which are transmitted from the radio base station 103 to the radio base station 100;
Fig. 5 shows an example in which settings for an LIE handover attribute value, a blacklist attribute value, and an LB attribute value are added;
Fig. 6 shows an example in which settings for the LIE handover attribute value, the blacklist attribute value, and the LB attribute value

are added;
Fig. 7 is a diagram showing a state in which the radio base station 100 transmits information elements of the cell 101 to the radio base station 103;
Fig. 8 is a diagram showing an algorithm for matching attribute values;
Fig. 9 is a table showing an algorithm for matching settings for handovers between radio base stations;
Fig. 10 is a table showing an algorithm for determining an actual blacklist setting of the radio base station 100 from the cell 101 to the cell 102;
Fig. 11 is a table showing an algorithm for unifying actual LB settings between radio base stations;
Fig. 12 is a schematic diagram showing a fourth exemplary embodiment;
Fig. 13 shows information elements of the cell 101 which are transmitted from the radio base station 100 to the radio base station 103 according to the fourth exemplary embodiment;
Fig. 14 shows information elements of the cell 102 which are transmitted from the radio base station 103 to the radio base station 100 according to the fourth exemplary embodiment;
Fig. 15 is a diagram showing an operation in which the radio base station 100 and the radio base station 103 according to a fifth exemplary embodiment mutually transmit the respective neighboring cell information elements;
Fig. 16 is a diagram showing a case where "isLBAllowed" is included in Cause values of the content of a MOBILITY CHANGE FAILURE message; and
Fig. 17 is a diagram showing a handover boundary when there is a mismatch between "isLBAllowed" of a radio base station and "isLBAllowed" of another radio base station.
Description of Embodiments
[0014]

An LTE handover is controlled using attribute values which are determined for each base station with respect to neighboring cells set in each radio base station. The term "attribute value" refers to a parameter defined in the 3GPP (Third Generation Partnership Project) standard for standardizing the LTE. However, in the control method using the current attribute values, handover failure occurs in some cases. [0015]
The above-mentioned handover failure occurs because, for example, the attribute values of neighboring cells, which are set for each of the radio base stations, are individually set to the radio base stations by an operator. Another cause is that radio base stations which use different algorithms individually set attribute values without knowing the setting of attribute values for the other radio base stations, which leads to a mismatch between the attribute values. Means for transmitting neighboring cell information between radio base stations or between radio base control stations can be achieved by using an X2 link (Non Patent Literature 6). [0016]
However, the means for transmitting the neighboring cell information does not include the attribute values corresponding to the pieces of neighboring cell information, and does not include any means for detecting a mismatch between the attribute values. Accordingly, there is a possibility that the attribute values will be different between the radio base stations. As a result, handover failure, load balancing failure, or a handover to an unexpected cell is caused by a user that moves between cells. [0017]
Further another cause of the handover failure is that 2G/3G/LTE have a function of exchanging the neighboring cell information between radio base stations, but cannot exchange O&M (operation and maintenance) attribute values such as " isHO Allowed" and "isLB Allowed". For this reason, handover failure or load balancing failure between two cells occurs in 2G/3G/LTE, and there has been no

solution to the problem. [0018]
According to this exemplary embodiment, a method for adding attribute values for each neighboring cell in information associated with the neighboring cells respectively included in radio base stations and for matching the attribute values between neighboring base stations will be illustrated below. [0019] - Causes of handover failure
When the attribute value (in the case of LTE, "isHOAllowed" disclosed in Non Patent Literature 3 or "No HO" disclosed in Non Patent Literature 4, as defined in the 3GPP standard) for a cell of a neighboring radio base station, which is set by a radio base station, is different from the attribute value included in the neighboring radio base station, handover failure of a mobile terminal between the radio base station occurs. [0020]
Three examples of the handover failure are given below. Failure Example 1
A handover failure example in which setting for information about permission/prohibition of a handover (hereinafter referred to as "handover permission/prohibition information") is different between the cells of the radio base stations will be described below.
A configuration in which a cell A and a cell B are controlled by different radio base stations will now be considered.
First, a case where a handover of a mobile terminal from the cell A to the cell B is allowed, while a handover of the mobile terminal from the cell B to the cell A is prohibited will be described.
At this time, the case where the mobile terminal moves from the cell A to the cell B and then returns from the cell B to the cell A includes the following steps.
Step SI: The handover from the cell A to the cell B is successful. Step S2: After step SI, the mobile terminal attempts to perform the handover from the cell B to the cell A.

Step S3: However, since the handover from the cell B to the cell A is prohibited, the mobile terminal moves to another cell, or a communication disconnection occurs. [0021]
Such a mismatch in the handover permission/prohibition information is caused due to a setting error by the operator. An upper node that controls the radio base stations may control the handover attribute value to be changed by using an algorithm such as MLB (Mobility Load Balancing) or MRO (Mobility Robustness Optimization). In this case, the set attribute value is different between the radio base stations, which may result in a mismatch between the handover attribute values in the radio base stations. [0022] Failure Example 2
A base station can notify a blacklist so as to prevent measurement of a specific cell. Such attribute information is hereinafter referred to as measurement permission/prohibition information. The above-mentioned handover failure of the mobile terminal may occur due to a difference in setting of the blacklist (corresponding to "blackCellsToAddMoList" in "MeasObj ectEUTRA" disclosed in Non Patent Literature 5) for the cells between the radio base stations, i.e., a different in setting for the measurement permission/prohibition information.
A configuration in which the cell A and the cell B are controlled by different radio base stations will now be considered. Since the cell A does not set the cell B in a blacklist, the mobile terminal in the cell A can carry out the measurement of the cell B and can acquire the information about the cell B.
On the other hand, since the cell B sets the cell A in the blacklist, the mobile terminal in the cell B is prohibited from measuring the cell A and thus cannot acquire the information about the cell A. [0023]
At this time, the case where the mobile terminal moves from the

10 cell A t o th e c ell B a nd t hen r etu r ns fro m th e cel l B to th e ce ll A i nclu des th e fo llo win g steps .
S t ep S 1: The h and ove r from th e c ell A to th e c ell B is su cc essful .
S t ep S 2: A fter s te p S1, the mobi l e term ina l atte m pts t o pe r form a
5 hand over t o t he cell A be cause t he r adi o wav e qu al it y o f t he c ell A is
ex cell ent ; h ow eve r , the hand ove r i s not su cc essful and th e mobi l e t ermin al p erfo rm s a ha ndov er to ano th er ce ll , o r h an do ver fa il ure oc cu rs . [ 0024]
10 Failure Example 3
As a r es ult of a di fferenc e in th e att ri bute v alu es b et we en the r adio b as e s t ati on s, not onl y th e han dov er f ailu re, but also lo ad balanci ng ( commu ni ca ti on lo ad distribut ion ) f ail ure occu rs . The LT E s et s th e at t ri but e valu e call ed "is LB Allo wed " ( Non P ate nt Lit era t ure 3)
15 ( herei naft er referre d to as "l oad di st ri butio n co ntrol
pe rmission /prohi bitio n in fo rm atio n) i n loa d bal anc ing .
A con fi gura ti on in w hi ch th e c ell A a nd t he cel l B are c ont roll ed b y d iffe r ent r adio base s tat ion s wi ll now b e c onsi der ed .
"is LBAl lo wed" fr om th e c ell A t o th e c ell B indi ca tes "Yes" ,
20 t hat is , lo ad b al ancin g is al lowed .
In a case where "isLBAllowed" from the cell B to the cell A i ndicat es " N o ", th at i s , lo ad b a lan cin g i s p r oh ibit ed , when th e t raffic of th e cell A i s h eav y, t he fol low i ng s tep s are t aken. S t ep S 1: The mo bile termin al i n t he c el l A i s cau s ed to p erform a
25 hand over t o th e ce ll B s o as t o distri bute th e tra ffi c f r o m t he cell A t o
t he cell B .
S t ep S 2: S ince "is LB Allo we d" f rom the c ell A t o the cel l B i ndi cat es "Y es " , t he mobi le termin al i n t he c el l A c an perfo rm a h an dov er to th e cell B, a nd t hus t he mob ile t ermin al in t he c ell A c a n easil y p erform a
30 hand over t o t he c ell B .
S t ep S 3: On th e ot he r hand , it i s n ecess ar y t o p r eve nt t he mo bi le
t ermin al from eas il y performin g a ha ndov er f r om t he cell B to th e cell
A. Th is is be ca use t he mo bi l e te rmi nal whi ch has pe r fo rm ed th e
hand over i n st ep S2 is prev ent ed from easil y r e tu rn in g from the cel l B

11 t o t he cell A.
S t ep S 4: The sam e bo und ary i s o r igin all y se t fo r t he h and over b etw een
t he cell A and t he cel l B d uri ng net wo rk constru ct ion .
[ 0025]
5 F or ex ampl e, as sh own i n Fi g. 17 , bo th t he cell A and t he cell B
s et a bou nda r y (1 ) as a h and ov er b ound ary. If the cel l A change s th e s ett ing o f t he hand over bo und ar y t o a b ound ar y (2 ) f or l o ad b alanci ng , t he cell B a lso cha nge s th e s ettin g of th e h and ov er bo und ar y t o th e bound ar y (2 ) i n the sam e man ne r as th e cel l A. Th is app li es on l y to
10 t he cas e wh ere th e pol i cies of "i s LB Al low ed " a r e uni f ie d. Th e ab ov e-
m enti on exam ple a ssumes a c ase w he r e th e ce ll B i s set t o p rohib it l oad b ala nc in g fr om t he c ell A . A cco rd ingl y, th e c ell A as s how n i n F i g. 1 7 sets t he b oun dar y (2 ) as th e bound ar y o f th e h and ov er t o t he cell B, a nd t he c ell B s ets the bo und ar y (1 ) as th e bou ndar y o f t he
15 hand over t o t he c ell A .
[ 0026]
With th is configu r at i on, wh en a mo bil e t ermin al 104 atte mpts to pe rform a han dov er fr om the cel l A t o the cell B, the cel l B att emp t s to ca use t he m obil e t ermin al t o p erform a h and ove r to th e cel l A b ecause
20 t he hando ve r bou nd ar y is s et at th e bou nd ar y ( 1). Afte r t hat , th e
m obil e te rmin al 1 04 , whi ch has r etu rn ed to t he cell A, i s c ause d t o pe rform a han dov er to the cel l A o r t he c ell B. As a re sult , th e m obi le terminal 104 performs a ping-pong handover between the cell A and the cell B.
25 F urt her , the m obile te rm i nal 1 04 pe r f orms a h an dover t o the cell
B for loa d bal ancin g from t he ce ll A t o the ce ll B. Ho we ver, s inc e "is LBAl lo wed" fro m th e cel l B to th e c el l A ind i cat es " No", a nu mbe r of mobile terminals 104 which have performed the handover from the cell A a re l oc ate d in t he c ell B, w hic h resu lts i n conge s tion in th e c ell
30 B. F or t his r ea son , lo ad balan cin g i s n ot satisfacto ri l y per fo rmed i n
t he en tire s ys tem . [ 0027]
M at chi ng b et ween at tri but e va lues for l o ad b alanci ng h as anoth er p ro bl em . In the cu rre nt 3GP P ( Non P at ent Lit erat ure 6)

12
st andar d, noti f ic at ion o f a pa r am et er ch an ge rel ate d to l o ad b alanc ing
is performed by transmitting and receiving MOBILITY CHANGE
REQUEST/ACKNOWLEDGE messages between radio base stations.
Even when a certain radio base station transmits the MOBILITY
5 CHANGE REQUEST message to a neighboring radio base station, the
r adio b as e s t ati on wh ic h h as r ec ei ved the m essa ge m a y r et urn a MO BILITY CHANGE FAILURE message. In the current situation, when t he r adio b ase s tati on w hic h h as r ec eived th e m es s age se t s "N o " as "isLBAllowed" and returns the MOBILITY CHANGE FAILURE
10 m es s age, t he r adio b ase st ati on w hic h h as tr an sm itt ed t he massa ge
ca nn ot re co gnize t he reaso n wh y t he n eigh borin g b as e s tatio n h as returned the MOBILITY CHANGE FAILURE message and cannot r eco gniz e if t he ca us e i s a mi smat ch bet ween the at trib ute s . [ 0028]
15 As a res ult , t he at trib ute s ca nno t b e ma tc hed betw een th e radio
bas e s tat ions , wh ich bri ngs th e mob ile t ermi nal 10 4 i nto a pin g-pon g hand over s t ate.
In addit ion , int erferen ce bet ween ce lls can b e p rev ent ed b y unif yin g t he a tt ribut e v alu es fo r "is IC IC Info r ma ti onS end All owed "
20 between the radi o base s tat ion s b y u si ng IC IC (In te r -Cel l In t erference
Co ord ina tion ) for p r event ing int erferenc e between c el l s . [ 0029]
Th e abo ve -me nt ion ed ex am ples o f h ando ver fa i l ure , i . e., f ai lure i n u nif yin g the att ri butes b etw een d iffe r ent ra dio bas e stat io ns , occur
25 due to t he f ol low in g causes.
1 ) A m is mat ch in ou tput b y a p lan ni ng to ol
2 ) A m is mat ch d ue to di f f erent ven dors
3 ) A m is mat ch d ue to di f f erent ca r ri ers 4) A mismatch due to RAN SHARING
30 5 ) A m is mat ch d ue to a n ambi guo us d efiniti on of an in terfa ce b etw ee n
a radio base station and EM (Element Management) [ 0030]
Exempl ar y emb odi men ts of th e present inv enti on wil l b e

13 des crib ed b elow with r eferenc e t o t he d r awin gs .
A first exemplary embodiment relates to a method in which an
at tribu te v alue t o b e actu all y s et for e ach cell is d et ermin ed from an
at tribu te v alue of a radio b as e s t at ion an d an a t t ribut e v al ue o f a
5 neigh bo ri ng r ad io b as e st atio n , based o n ex chan ge o f i nfo rmati on ab out
at tribu tes of cells between the radio b as e st atio ns [ 0031] Ex pl a nati on of S ystem C on fi gurati on
F i g. 1 s hows a c on figu r ati on of a r ad io comm uni catio n s ys te m 1
10 ac cordin g t o an exem plar y embo diment of the p r esen t i nventio n . Th e
r adio commu ni cation s ys tem 1 in cl udes ra dio bas e st ation s (1 00, 103 ) , cell s ( 101, 102 ) , and r adi o t ermin al s (1 04, 105 ). A rad io ba se st atio n cont ro l de vi ce 3 and a relay d ev i ce 4 are conn ect ed vi a a communication network .
15 [0032]
The radi o ba s e station 1 0 0 a nd the ra dio bas e st ation 103 are r adio b as e s t ati ons e ach h avin g a n in terfac e fo r ex cha ng i ng cell i nformat ion . Th e LT E c arries o ut ex chan ge o f n ei ghbo rin g ce ll information as messages, such as X2 SETUP REQUEST, X2 SETUP
20 RESPONSE, and ENB CONFIGURATION UPDATE, between radio base
st at ion s b y us ing a n X2 in te rface. Th e ce ll 101 whi ch is cont r oll ed b y t he r adio b as e s t atio n 100 and th e ce ll 102 whi ch is co ntroll ed b y t he bas e s tat ion 1 0 3 are neigh borin g cel ls . The r adi o b as e s tatio n co ntrol devi ce 3 and t he r ela y d evi ce 4 w ill be d escri bed in d eta i l late r.
25 [0033]
In th is case , th e cel l 1 01 and t he cel l 10 2 m a y be lar ge cel ls (fo r ex am ple, m ac rocel ls ) whi ch are pla na rl y ex p and ed as a p ublic r adi o s ys tem, or ma y b e cel ls ( f or ex am ple , microcells, pi co cel ls , an d f em tocell s ) which a r e m ain l y lo cated in a ge ograp hi call y li mite d area ,
30 su ch as , the i nsi de o f a house, a com pan y, a nd the l ike .
[ 0034]
F i g. 2 s hows an overvi ew o f a s yst em wit hin each radi o bas e st at ion . E ach r adi o b as e sta ti on (10 0, 10 3) in cl udes a radi o commu nic ati on pro cessi ng un it 1 1 0, an i nte r - ba s e-st at ion message

14 processin g unit 1 1 1, a nd a d at abase un it 1 12. T he radi o
commu nic ati on pro cessi ng un it 1 1 0 tra nsmi ts t he n eighb orin g cell
i nformat ion an d th e l i ke t o a mobi l e termi nal . T he in te r -base -st ati on
m es s age pr ocessin g unit 111 t r ans mits n ei ghborin g ce l l i nform at i on to
5 a nei ghbo r ing ba s e st atio n and rece ive s nei ghb ori ng cel l i nformat ion
f r om t he n ei ghb orin g bas e s tat ion. [ 0035]
The i nter-b ase -st ation m ess age p roc ess i ng uni t 11 1 trans mit s neigh bo ri ng cell i nform ati on (in f ormati on 1 ) , whi ch is st ored in t he
10 database unit 1 1 2 , t o t he nei ghbo ri ng base station . Furth er, the i nter -
bas e - station m essage p r oc essin g unit 1 1 1 st ores n eigh bo rin g cell i nformat ion (i nforma tio n 2 ), w hic h i s re ce ived from the n ei ghbo r in g bas e s tat ion , in t he da tabas e uni t 1 12. T he n the radi o com muni cati on processi ng uni t 1 1 0 t r ansm its, t o t he m obil e t ermi nal , nei ghb ori ng cel l
15 i nformat ion (i nforma tio n 3 ) w hic h i s de r ived fro m the in fo r matio n 1
and th e i nfo rmati on 2 . [ 0036]
The d at ab as e un it 112 sto r es nei ghbo ri ng cell in form ati on el em ent s . Fig. 3 s how s the i nfo rmat ion el em ent s of the cell 10 1 wh i ch
20 are t r ans mitt ed to th e rad i o base st at ion 1 03 fro m th e radio b as e
st at ion 100. Simil arl y, Fig. 4 sh ows the i nformat ion el eme nts of th e cell 1 02 which are tra nsmit te d to t he r adio b as e s tat io n 10 0 f r om th e r adio b as e s t a ti on 10 3. Th e i nform atio n e lements of t he cel l 101 wh ich are t r ans mitt ed to the rad i o base st at ion 1 03 fro m the radio b as e
25 st at ion 1 0 0 are l is t ed below .
( Info rm ati on ab out Cel l 101)
- In fo rm a t i on abou t cell s a dja cent t o the cel l 101 (also in cl udi ng the
i n fo rmat ion about the cell 1 02 i n thi s c ase )
- A t empo rar y h an dov er set t i ng o f t he rad io b as e st atio n 100 from the
30 cell 1 01 to th e ce ll 102
- A t empo rar y b la cklist s ett in g o f t he rad io b as e st atio n 100 from t he cell 1 01 to th e ce ll 102
- A t empo rar y LB ( Loa d Bala ncin g) sett i ng of th e radi o base station 100 from th e cel l 101 to th e c el l 102

15
- A n a ct ual han dover set t i ng o f th e radi o base station 10 0 f r om the cel l 101 to th e cel l 102
- A n a ct ual bla cklist s ettin g of th e radio b ase st ati on 100 f ro m t he cell 101 t o th e c ell 102
5 - A n a ct ual LB ( Lo ad Balan cin g) se tting o f t he rad io b ase st ati on 100
f r om t he c ell 10 1 to the cel l 102 [ 0037]
Note t hat t he tem porary ha ndo ver se tting, th e tem pora r y bl acklist s et tin g, a nd t he tem porary LB se tting need n ot necessa ri l y b e
10 t r ansmitt ed t o th e mo bi le t ermin al . The abov e -m ent ion ed c ell
i nformat ion element s a r e s et for eac h n eigh borin g cell .
The differ en ce bet ween th e te mpo rary ha nd over s etti ng of t he r adio b as e s t ati on 10 0 from the cell 10 1 t o the cel l 1 02 an d th e actual hand ov er s ettin g of t he ra dio bas e st ation 1 00 from th e c ell 101 t o the
15 cell 1 02 wi ll n ow be d es crib ed . The v alue f or the tempo r ar y hand ov er
s ett ing i s n ot ne ce ss aril y t he s am e a s the val ue for th e actu al han dov er s ett ing . The a ct ual han dover se tt ing of the r a dio base s tati on 100 f ro m t he cell 1 01 t o th e c el l 102 is determin ed bas ed on t he tempo r ar y hand over s ettin g of t he ra dio bas e st ation 1 00 from th e c ell 101 t o the
20 cell 1 02 and th e t emp orar y h an dover s etting rece iv ed from th e radio
bas e s tat ion 103. [ 0038]
The a ct ual han dover se tti ng ref ers to a ha ndover set tin g actua ll y appli ed b y t he ra dio bas e s tatio n 10 0. O n th e ot he r h and , th e
25 t empo r ar y h and ov er s ettin g ca n be made b y a n oper at or or an al gorithm
such as MRO (Mobility Robustness Optimization ). The actual hand over s ettin g re f ers to an a tt ri but e valu e, th e set tin g of whi ch ca nn ot b e ch ange d b y t he op er at or, MR O, or th e lik e. [ 0039]
30 S im ilarl y, th e ra di o base st ation 100 a ppli es th e t em pora r y
bl acklist setti ng from th e c ell 10 1 t o th e ce ll 102 , t he act ual bla cklist s ett ing fro m th e c ell 101 to t he c ell 10 2, th e te mpo rary LB s etti ng fr om t he cell 1 01 t o t he c ell 102 , an d th e act ua l LB s ett ing from t he cell 10 1 t o t he cell 102.

16 [ 0040]
If a po lic y regard in g t he h an dover se ttin g in dic at es "Yes ", th e
hand over i s allo wed. If t he pol icy i ndicat es "N o ", th e h andov er is
prohibi ted . In t he fo ll owi ng d es cri ptio n, "Yes " a nd " No " for t he
5 hand over se tt ing a re used in t he meani ngs se t out abov e. Th e h and ove r
s ett ing corresp ond s to "is HO Al low ed " in th e 3GPP st an da rd . [ 0041]
If a po lic y regard in g th e b la cklist s etti ng indi ca tes "Yes ", a cell
i s in clud ed in a bl acklist. If th e policy ind i cat es "N o ", the cel l is no t
10 i nclu ded i n t he b la cklist . In t he foll owi ng d esc ri pt ion , "Y es" an d "No"
f or th e b l acklist setti ng a r e use d in the m ea ni ngs s et o ut ab ov e.
When a pol i c y re ga r di ng th e LB s ett i ng in dic ates "Yes", t he LB
i s ex ecute d. W he n the po lic y i ndi cates "N o ", the LB i s no t execut ed .
In th e foll owin g de s cri ptio n, "Y es " a nd "No" for the LB s ettin g are
15 us ed in th e m eanin gs set o ut abo ve.
[ 0042]
The i nfo rm at ion elem ents of th e cel l 102 whic h a r e t ransmitted
f r om t he r adio b ase s tati on 1 03 to t he r adio b as e s tat io n 100 are as
follow.
20 - In fo rm ati on a bo ut th e cel l 102
- In fo rm ati on a bo ut c ells adj ac ent to the cel l 102 (also in clu di ng the i nformat ion ab out the cell 1 01 i n thi s c ase )
- Te m porar y han do ve r s ettin g of the radio b as e st ati on 103 from t he cell 1 02 to th e ce ll 101
25 - Te m porar y black lis t set t i ng o f th e radi o base station 10 3 f r om the
cell 1 02 to th e ce ll 101
- Te m po r ary LB se tt i ng o f th e radi o base s tat ion 10 3 f r om t he cell 102
to the cell 101
- A ctu al ha ndo ver s ett ing o f t he rad io b as e st ati on 103 from t he cell
30 102 to th e cel l 101
- A ctu al bl ack l i st s ett ing o f t he rad io b as e st ati on 103 from t he cell 102 to th e cel l 101
- A ctu al LB s et tin g of t he ra dio bas e s tati on 103 f ro m t he c ell 10 2 to t he cell 1 01

17
Note t hat th e tem porary ha ndo ver s et ting , the tem pora r y
bl acklist setti ng , a nd t he tem porary LB se tting n ee d no t n eces s ari l y be
t r ansmitt ed to th e mo bi le t ermin al .
[ 0043]
5 Figs. 5 and 6 each show an example in which an LTE handover
at tribu te valu e , a bla cklist a ttri but e v alu e, and an LB a tt ri bu te value s ett ing are add ed .
The neighboring cell information includes X2 SETUP REQUEST, X2 SETUP RESPONSE message, and ENB CONFIGURATION UPDATE.
10 In t his exemp la r y em bod ime nt , s ett i ngs for is HO Al low ed, B l ackcell List,
and is LBA llowed a r e add ed to th es e me s s age s a s attrib ut e value s . Th e below-described operation according to an exemplary embodiment corresponds to an exchange of X2 SETUP REQUEST and X2 SETUP RESPONSE between the radio base station 100 and the radio base
15 st at ion 103.
[ 0044] Ex pl an ati on o f Op erat i on
As sho wn in Fig. 7, th e int er-b ase -stat i on messa ge pro ce ssin g unit 1 1 1 in th e r adio bas e s tatio n 10 0 r eads ou t t he i n format ion ab out
20 t he cell 1 01, whic h i s s tore d i n the dat ab ase unit 11 2, and t r ans mits
t he in fo r matio n el eme nt s of t he cel l 101 to th e radio b as e st ati on 103 .
In th is case , t he i nfo rm at ion ele ment s of the ce ll 101 in clud e a
hand over se tt ing , a b la cklist s e ttin g, an d an LB s etti ng , and a r e
t r ansmitt ed from t he ra di o bas e st ation 100 t o the radi o bas e sta tion
25 103 (S011).
[ 0045]
The i nte r -b ase -st ation m ess age p roc ess i ng uni t 11 in th e radi o bas e s tat ion 1 0 3 st ores t he re cei ved i nformati on e l ement s of th e cell 101 i n th e database u ni t 112 . Th e i nter - ba s e- st ati on messa ge
30 processin g unit 1 11 in th e r adio b as e s tatio n 103 reads out the
i nformat ion about the cell 1 02 , whi ch is st ored i n the dat ab as e unit 11 2, and trans mits t he i nformati on e l ement s of th e c ell 102 to th e radio b ase st at ion 100. The i nte r -b as e-sta t i on me s s age pro ce ssing u nit 11 1 i n the r adio b as e s t ati on 10 3 tra nsmit s , to th e r adi o b ase sta t i on 10 0, the

18 i nformat ion el em ent s of th e ce ll 1 02 w hi ch i ncl ud e a hando ve r s etti ng , a blackli st se tt ing , a the LB s ett in g (S0 12). [ 0046]
In t his ex empl ary emb odiment , t he a tt ri but e valu e s of th e
5 neigh bo ri ng cell i nform ati on a r e tra ns mit ted and receiv ed bet ween th e
r adio b as e s t ati ons . Th e i nter -b ase-sta ti on m es s age p ro ce ssin g u nit 111 in th e r adio b ase st ati on 10 0 r ea ds t he i nformati on abo ut t he cell 102 and st ore s the r ead i nformat ion in t he d ata base u nit 112 . T hen th e r adio b as e s t ati on 10 0 upd ates th e n ei ghborin g cell i nform ati on (S 013 ).
10 [0047]
Aft er th at , t he in te r - base - st ati on m ess age p roces si ng unit 11 1 in t he r adio b as e s t atio n 100 comp ares the att ri bute v alu e fo r t he t empo r ar y h and ov er se tt i ng o f t he radi o ba s e station 103 from t he cell 102 to th e cel l 101 , w hi ch h as be en rec eiv ed ear lie r an d inc lud ed in t he
15 i nformat ion el em ent s o f t he cell 10 2 s to red i n the dat ab as e unit 1 1 2,
wi th th e at t ri but e valu e fo r t he t emp orar y h an dover s et ting of th e rad io bas e s tat ion 10 0 f r om t he cell 101 to t he cell 10 2 . T hen the i nte r -bas e - station m essage p r oc essin g unit 1 1 1 det ermin es t he actu al hand over s ettin g of t he ra dio bas e st ation 1 00 from th e c ell 101 t o the
20 cell 1 02 bas ed o n an al gori thm sho wn in Fi g. 9. Aft er th at , th e int er-
bas e - station m essage p r oc essin g unit 1 1 1 in th e rad io b as e st ati on 100 st ores t he act ual h and over set t i ng in the da tab as e uni t 11 2. [ 0048]
The i nter-b ase -st ation m ess age p roc ess i ng uni t 11 1 in th e rad io
25 bas e s tat ion 100 com pares th e attrib ute v alue fo r th e tem po r ar y
bl acklist s et tin g of t he ra dio bas e st ation 1 03 from th e c ell 102 t o the cell 1 01 , wh ich ha s been re ce iv ed e a rl i er an d inc luded in t he i nformat ion el em ent s o f t he cell 10 2 sto r ed i n th e d ata bas e un it 112, wi th th e at tribu te v al ue fo r t he t emp orar y b la cklist s ettin g of t he r adio
30 bas e s tat ion 10 0 f r om t he cell 101 to t he cell 10 2 . T hen the i nte r -
bas e - station m essage p r oc essin g unit 1 1 1 det ermin es t he actu al bl acklist s et tin g of t he ra dio bas e st ation 1 00 from th e c ell 101 t o the cell 1 02 bas ed o n an al gori thm sho wn in Fi g. 10. Afte r t hat , th e in ter -bas e - station m essage p r oc essin g unit 1 1 1 in th e rad io b as e st ati on 100

19 st ores t he a c t ual b lac klis t s ettin g in th e d at abase u nit 112 . [ 0049]
The i nte r -b ase -st ation m ess age p roc ess i ng uni t 111 in th e rad io
bas e s tat ion 1 0 0 com pares th e attribut e va lue fo r th e tem po r ar y LB
5 s ett ing o f t he rad io base st ati on 103 from th e ce ll 1 02 t o the cell 101 ,
which has b een recei ved earli er and incl uded i n th e i nformat i on el em ent s of th e c ell 102 st ored in t he da tab as e uni t 1 1 2, wi th t he at tribu te v alue f or t he t emporary LB s etti ng of th e radio b as e st ati on
100 from th e cel l 101 to th e c el l 102 . The n th e int er-bas e-s tati on
10 m es s age pr ocessin g unit 111 d et ermi nes th e act ual LB s ettin g of t he
r adio b as e s t ati on 10 0 from the cell 10 1 t o the cel l 1 02 bas ed on th e
al gorit hm shown in Fi g. 10 . Afte r th at , th e in ter-b ase -st atio n m ess age
processin g unit 1 11 in th e r adio b as e s tatio n 100 st or es t he actua l LB
s ett ing i n t he d ata bas e un it 1 12.
15 [0050]
The i nte r -b ase -st ation m ess age p roc ess i ng uni t 111 in th e rad io bas e s tat ion 1 0 0 r ea ds ou t th e up dat ed in f orm ati on el e ment s of th e cell
101 from th e da t ab ase u ni t 112 , a nd tra nsmit s pa r t of t he i nformat ion
t o t he ra di o bas e s tatio n 103 (S01 4).
20 P art of th e up date d information el ements of t he cell 1 01 is liste d
below.
- A n a ct ual han dover set t i ng o f th e radi o base station 10 0 f r om the cel l
101 to th e cel l 102 , th e act ua l ha nd ov er set tin g bein g upd ated b y
comp arin g t he te mporary ha nd over set ti ngs bet ween th e radio bas e
25 st at ion s .
- A n a ct ual bla cklist s ettin g of th e radio b ase st ati on 100 f ro m t he cell
101 to th e cel l 102 , th e act ua l bl acklist settin g be i ng upd at ed b y
comp arin g t he te mporary bl ac klist se tti ngs be tw een th e rad io b ase
st at ion s .
30 - A n a ct ual LB se tting o f t he rad io b ase st ati on 100 fro m t he cell 1 01
t o t he c ell 10 2 , the actu al LB s etti ng bei ng u pda t ed b y c om pa rin g the t empo r ar y t he LB settin gs between th e r adi o b as e st ati ons . [ 0051]
Aft er th at , t he ra dio comm un icatio n process ing uni t 11 0 in t he

20 r adio b as e s t ati on 10 0 tra nsmit s th e i nform atio n el em en ts o f t he neigh bo ri ng cel l 102 , whi ch are read from the dat ab ase u nit 1 12, t o the m obil e te rmin al 1 04 und er co ntrol of th e ce ll 101 (S01 5).
F i g. 7 s hows a ca s e wher e th e cell i nfo rmat ion i s firs t s ent to
5 t he r adio b as e s t atio n 103 from th e r adi o b ase sta t i on 1 00. Ho wev er,
t he cell in f orm ati on m ay b e fi rst s ent t o th e r adi o bas e st atio n 10 0 f r om t he r adio b ase s tati on 1 0 3. [ 0052]
F i g. 8 s hows an al gorit hm for m at chi ng , i n th e b as e s t atio ns, t he
10 at tribu te v alues w hic h are t r an smitt ed a nd receiv ed betw ee n th e b as e
st at ion s .
The i nter-b ase -st ation m ess age p roc ess i ng uni t 111 in th e rad io bas e s tat ion 1 0 0 r ec ei ves th e i nf o rm at ion ele men ts of t he cell 10 2 f rom t he r adio b as e s t atio n 103 , and st ores th e receiv ed info rm ati on
15 el em ent s in th e da tabas e unit 11 2 (S02 1). Th e int er-b ase -st atio n
m es s age pr ocessin g unit 11 1 in the r adi o b ase sta t i on 1 00 confirms the t empo r ar y h and ov e r setti ng, th e t em porar y b la ck li st se tti ng, an d th e t empo r ar y LB setti ng whi ch a r e i ncl ud ed i n th e info rmation el em ents of th e c ell 102 st ore d in t he da tabas e uni t 1 12 (S02 2).
20 [0053]
In th e foll owin g pro ces si ng, a met hod fo r act ual h ando ve r s ett ing w ill be des crib ed . P ro cessin g f or a ct ual bl ack list s ettin g an d actu al LB s ettin g i s c arried o ut in th e s am e m ann er as in th e processin g fo r t he act ual h and ove r se tti ng .
25 [0054]
The i nter-b ase -st ation m ess age p roc ess i ng uni t 11 1 in th e rad io bas e s tat ion 100 con f irm s th e t emp orar y h an dover sett ing of th e r adio bas e s tat ion 10 3 f r om t he cell 102 to t he cell 10 1 whic h is in clu ded in t he in fo r matio n el eme nt s of t he cel l 102 of th e radi o ba se sta tion 10 3
30 st ored in t he databas e unit 11 2 ( S02 3).
[ 0055]
( 1 ) W h en the t e mpo r ary ha ndov er se tting o f t he rad io b ase st ati on 100 f r om t he c ell 10 1 to the cel l 102 , wh i ch is in cl ud ed in t he info rm ation el em ent s o f the ce ll 101 o f th e base st ation 1 00 st ored in th e d ata ba s e

21
unit 11 2, i s th e s ame as th e t em porar y h an dover sett ing o f t he ra di o
bas e s tat ion 10 3 f r om t he cell 102 to t he cell 10 1 , w hic h is in clu ded in
t he in fo r matio n el eme nts o f t he cell 10 2 r eceiv ed fro m the b ase s tati on
103, th e i nter-b as e-s tat io n me ssa ge pro cessi ng un it 1 1 1 i n the radi o
5 bas e s tat ion 1 0 0 s ets t he s ame att ri bute v alu e for the actu al h and ov er
s ett ing o f t he rad io base st ati on 100 from th e ce ll 1 01 t o the cell 1 02 as th e at tri but e va lue for t he t emp orar y h an dover s etti ng (S 024 ) . [ 0056] ( 2 ) W h en the t emp ora r y ha ndov er se tting o f t he rad io b ase st ati on 100
10 f r om t he c ell 10 1 to the cel l 102 , wh i ch is in cl ud ed in t he info rm ation
el em ent s o f the ce ll 101 o f th e base st ation 1 00 st ored in th e dat ab ase unit 1 12, i s d iff ere nt fro m the t emp orar y h an dover s et ting of th e rad io bas e s tat ion 10 3 f r om t he cell 102 to t h e c ell 10 1, w hic h is in clu ded in t he in fo r matio n el eme nts o f t he cell 10 2 r eceiv ed fro m the b ase st ati on
15 103 , the i nte r -b as e-s tat io n me ssa ge pro cessi ng un it 11 1 i n the r adio
bas e s tat ion 10 0 ch anges th e a ct ual han dover settin g (S0 25). An al gorit hm for ch a n gin g th e attribu te v alu e w ill be d esc ri bed l ate r wit h r eferenc e t o F i g. 9 . [ 0057]
20 F i g. 9 s hows an ex am pl e of t he algo r it hm for th e radi o b ase
st at ion s t o m atch th e hand ove r se tti ngs be t ween th e rad io ba se stat ion s .
Gi ven bel ow is an ex ampl e of th e alg or ithm fo r m atc hi ng th e actu al h and ov er se tt i ng of t he radio b ase st atio n 1 03 f r om th e cell 101 t o t h e cell 102, wh ich i s o ne of t he i nformati on e lements of th e c ell
25 101 of th e radi o ba s e station 100 , wi th t he ac tu al h an dov er settin g of
t he rad io b ase st atio n 103 from th e cel l 102 to t he c ell 10 1 , whi ch is i nclu ded i n t he info rm at ion ele ment s o f t he cell 10 2 re ceiv ed from th e bas e s tat ion 10 3. [ 0058]
30 ( 1 ) A c ase whe r e t he t emporary h an dover s ett i ng o f th e rad io base
st at ion 1 00 from th e cell 1 01 to th e c ell 10 2, wh i ch is in cl ud ed in t he i nformat ion el em ent s of th e ce ll 1 01 o f t he bas e st atio n 100 s tored in t he datab ase uni t 112 , is t he sam e a s the t emp orar y h a ndo ve r set tin g of t he rad io b ase st atio n 1 03 from the cel l 102 to t he cell 10 1

22
Wh en both of th e s ettin gs in di cate "Yes", the i nte r -base -st atio n
m es s age pr ocessin g unit 111 i n t he r adi o b ase sta t i on 1 00 tra nsmi ts , t o
t he datab ase uni t 112 , the a ctu al hando ve r s etti ng "Y es" of th e radio
bas e s tat ion 10 0 f r om t he cell 101 to t he cell 10 2 . T he d at aba s e u nit
5 11 2 u pdat es the a ctu al han dov er se tti ng "Ye s ". T his all ows t he radi o
bas e s tat ion 1 0 0 to b e act ual l y a da ptabl e to th e hand ov er f r om t he cell 101 t o th e cell 1 02. [ 0059]
When both of th e sett in gs in di cate " No", the i nte r -bas e-stat ion
10 m es s age pr ocessin g uni t 111 i n t he r adi o b ase sta t i on 1 00 tra nsmi ts , t o
t he datab ase uni t 112 , the a ctu al hando ve r s etti ng "N o" o f th e radi o bas e s tat ion 10 0 f r om t he cell 101 to t he cell 10 2 . T he d at aba s e u nit 112 u pdat es the a ctu al han dov er se tti ng "N o ". T his all ows t he rad i o bas e s tat ion 1 0 0 to b e a ctu al l y a da ptabl e to th e hand ov er f r om t he cell
15 101 t o th e cell 1 02.
[ 0060]
( 2 ) A c ase whe r e eith er th e te mporary ha nd over s etti ng of t he ra dio bas e s tat ion 10 0 f r om t he cell 101 to t he cell 10 2 , w hic h is in clu ded in t he in fo r mat ion elem en t s of th e cel l 101 o f th e ba s e station 1 00 st or ed
20 i n t he d ata base u nit 1 12 , o r th e tem po rary ha ndo ver settin g of t he r adio
bas e s tat ion 10 3 f r om t he cell 102 to t he cell 10 1 , w hic h is in clu ded in t he i nfo rmat ion el em en ts o f th e cel l 102 rece i ved fro m the bas e s tatio n 103
Th e i nter-b ase -st ation m ess age p roc ess i ng uni t 11 1 trans mit s , to
25 t he datab ase uni t 112 , th e a ctu al hando ve r s etti ng "No " o f th e ra di o
bas e s tat ion 10 0 f r om t he cell 101 to t he cell 10 2 . T he d at aba s e u nit 112 u pdat es the a ctu al h and over se tti ng "N o ". [ 0061]
This al low s th e r adi o b ase sta ti on 1 00 to b e actu all y ad apt abl e
30 t o the h and ov er from t he c ell 10 1 t o th e ce ll 102. If t he a ttribut e
valu e s et fo r the cel l 1 01 is di fferent from th e attrib ute v alue s et for t he cell 1 02 , the s et tin gs for th e attrib ute value s can b e ma tch ed to "Y es " o r "No ", as lon g as th e s ame o pe r ati on is c arri ed o ut i n al l ce ll s ac cordin g t o a p r ed et ermi ned cri teri on for each a lgo rit hm.

23 [ 0062]
F i g. 1 0 sho ws an e xam pl e of th e algo ri thm for th e radi o ba se
st at io n s t o m at ch t he blackl is t set tin gs betw een t he radio b as e s tati ons .
Gi ven bel ow is an ex ampl e of th e alg orit hm for mat chin g the
5 actu al bl ac kl is t s ettin g o f the radi o bas e s tat ion 1 03 f r om t he c ell 10 1
t o t he c ell 10 2, wh ich is o ne of t he i nfo rmati on el em ents of th e c ell 101 of th e base sta tion 10 0 , wi th t he a ctu al blackl is t settin g of th e r adio b as e s t ati on 10 3 from the cell 10 2 t o the cel l 1 01 , whi ch is i nclu ded i n t he info rm at ion ele ment s o f t he cell 10 2 re ceiv ed from th e
10 bas e s tat ion 103.
[ 0063]
( 1 ) A c ase whe r e t he t emporary b la cklist s etti ng o f t he rad io b as e st at ion 1 00 from th e cell 1 01 to th e c ell 102 , wh i ch is in cl ud ed in t he i nformat ion el em ent s of th e ce ll 1 01 o f t he bas e st atio n 100 s tored in
15 t he d atab ase u ni t 112 , is t he sam e a s the t emp orar y b lackl ist s etti ng of
t he rad io b ase st atio n 1 03 from the cel l 102 to t he cell 10 1
When both of th e sett in gs in di cate "Yes", the i nte r -base -st atio n m es s age pr ocessin g unit 111 i n t he r adi o b ase sta t i on 1 00 tra nsmi ts , t o t he datab ase uni t 112 , the a ctu al bl ac kli st set ti ng "Ye s " of the r adio
20 bas e s tat ion 10 0 f r om t he cell 101 to t he cell 10 2 . T he d at aba s e u nit
112 u pdat es the a ctu al bla ckl i st set ti ng "Y es". This a ll ows th e radio bas e s tat ion 1 0 0 to b e a ctu al l y a da ptabl e to th e blackl ist f rom t he cell 101 t o t he cell 1 02. [ 0064]
25 When both of t h e settin gs in di cate "No", the i nte r -bas e-stat ion
m es s age pr ocessin g unit 11 1 in the r adi o b ase sta t i on 1 00 trans mits , t o t he datab ase uni t 112 , the a ctu al bla ckli st set ti ng "No " o f t he rad io bas e s tat ion 10 0 f r om t he c e ll 101 t o th e cell 102 . T he d at aba s e u nit 112 u pdat es the a ctu al bla ckl i st set ti ng "N o ". Thi s a ll ows th e radio
30 bas e s tat ion 1 0 0 to b e a ctu al l y a da ptabl e to th e blackl ist f rom t he cell
101 t o th e cell 1 02 . [ 0065]
( 2 ) A case whe r e eith er th e te mporary b l ac klis t set tin g of th e ra di o bas e s tat ion 10 0 f r om t he cell 101 to t he cell 10 2 , w hic h is in clu ded in

24
t he in fo r matio n el eme nts of t he c ell 101 o f t he bas e st ation 1 00 st ored
i n t he databas e un it 1 12, or th e tem po rary bl ac kli st set ting of th e rad io
bas e s ta t ion 1 03 from th e ce l l 102 t o t he cell 101 , w hic h is in clu ded in
t he in fo r matio n el eme nts o f t he cell 10 2 r eceiv ed fro m the b ase st ati on
5 103 , indi cates "Y es"
The i nter-b ase -st ation m ess age p roc ess i ng uni t 11 1 in th e rad io bas e s tat ion 100 t r ansmits, to th e da t ab as e un it 1 12, th e actu al bl acklist s et tin g "Y es" of t he radio bas e s tat ion 10 0 f r om t he c ell 10 1 t o t he c ell 10 2 . Th e dat abas e unit 1 12 up dat es t he actu al blackli st
10 s ett ing "Y es " . Th is allo ws t he r adi o base st at ion 1 0 0 t o be act ual l y
ad ap tab le t o the bla ckl i st from t he c ell 101 to t he cell 102 . [ 0066]
F i g. 1 1 sho ws an e xam pl e of th e al gori thm fo r th e radi o ba se st at ion s t o mat ch th e a ctu al LB se tti ngs b et we en the radi o ba se st atio ns .
15 The a ct ual LB se tt ings b etw een th e ra dio bas e st ation s are
matched using an exemplary algorithm shown in Fig. 11 by employing a m eth od si m ilar t o the algo rit hm f or m atchin g the bl ac klist set tin gs between the radi o base s tat ion s . Also in thi s cas e , if th e attrib ute valu e s et fo r the cel l 1 01 is di fferent from th e attr ib ute v alue s et for
20 t he cell 1 02 , the s etti ngs fo r t he att r ibut e v alu es c an be m at ched t o
"Y es " o r "No ", as lon g as th e s ame o pe r ati on is c arri ed o ut i n al l ce ll s ac cordin g t o a p r ed et ermi ned cri teri on for each a lgo rit hm. [ 0067]
The above exemplary embodiment illustrates an example in
25 which the at tribu te v alue of the b as e s tatio n 100 i s ch an ged . Ho we ve r,
t he pres ent inv ent ion is not l i m ited to th is ex em pla r y e mbod ime nt . Th e prese nt i nv ent ion may i nc lude a st ep in wh ic h th e b as e s tatio n 1 0 0 t r ansmits t he i nfo rmati on el eme nts of th e cell 1 01 to t h e ba s e statio n 103 (S01 1) an d t h e ba s e statio n 1 03 c omp ares th e receiv ed in form atio n
30 wi th th e at t ri but e valu e inc lud ed in t he b as e st ati on 103 a nd ch an g e s
t he at tribu t e val ue o f th e b ase st ati on 103 . Fu rt her, the rad io b ase st at ion cont rol d evice 3, whi ch will be des crib ed lat er, ma y dete rm ine which one of the a ttri but e va lue s of th e ba s e station s is t o be ch an ged . [ 0068]

25
In th is m an ner, t he attribu tes of t he han dover se ttin g, t he
bl acklist setti ng , a nd th e LB s et tin g ca n be mat ch ed, t her eb y m aki ng it
possib le t o prevent h and ov er fai lure and lo ad bal an cin g failu r e from
oc cu rr ing due t o a mi sm at ch c aus ed b y a set ti ng erro r b y t he op erat or,
5 or a diffe r ence in th e set lo gi c in t he rad io base st at ions 10 0 an d 103 .
Further, when the MRO (Mobility Robustness Optimization ) is used to prohibi t a h and ove r an d l oad b al an ci ng of a ce rtain radio b as e s tati on A t o a n eigh borin g r adio b as e s tatio n B , th e att ri but e valu es f or th e hand over and lo ad ba l ancing c an b e mat ch ed b y p r ohi biti ng th e
10 neigh bo ri ng radi o base s tat ion B fro m pe r formi ng a hando ve r a nd l oad
balanci ng to th e r adi o b ase sta ti on A. Co ns equ entl y, th e oc cu rrence of hand over f ai lure and lo ad bal anci ng fai l ure can b e p rev ent ed . [ 0069] - Expl an atio n of A dva nt ageou s E f f ec ts
15 The fi rst ex emplary e mb odiment provi des t he fo ll owi ng
advantageo us effect s .
( 1 ) T he nei ghb ori ng in f orm ati on sha r ed bet we en th e radio b as e s tati ons can be made known. ( 2 ) Aft er a fi rst o pe rati on is achieve d, i f th e att r i but e va lue fo r th e
20 r adio b as e s t ation B is i nco r r ec t l y set b y th e rad io base st at i on A, t he
s et t ing o f t he at tribu te val ue fo r th e ra dio base st ation A b y th e neigh bo ri ng r ad io b as e st atio n B i s e val uated a nd th e set t i ng o f th e at tribu te v alue t o b e actu all y t ransm itte d t o the r adio b as e s tat ion B f r om t he r adio b ase s tati on A i s u pd ated , th ere by m ak ing it po ssib le to
25 prevent a mi sm at ch in th e s ett in g of at t ri but e va l ues be twe en th e radi o
bas e s tat ions due t o an erro r cau s ed b y a n ex t ern al fa ct or . ( 3) As a res ult of achi evi ng the o perat i on s (1 ) a nd (2 ), t he uni fi ed neighboring cell information can be made known to each mobile t ermin al un de r con tr ol o f a b as e st ati on .
30 [0070]
( 4) As a r es ul t of a chievin g the op erat ion s (1 ) a nd (2 ), t he n umb er o f oc cu rr en ces of ha ndov er f ai lu r e of th e m obil e t ermi nal can b e redu ce d . ( 5) As a res ult of achi evi ng the o perat ion s (1 ) a nd (2 ), when an at tribu te v alue i s set to a ne ighbo ri ng c ell b y u si ng an algo r it hm, s uc h

26
as MRO (Mobility Robustness Optimization) or SON algorithms, a
m i sm atch be tween th e att ri bu te v al ues o f the radi o base st atio ns can b e
el imin at ed and t he num ber o f occu r r en ces of han dover f ailu r e o f th e
m obil e te rmin al c an be redu ced .
5 [ 0071]
( 6) As a res ult of achi evi ng the o perat ion s (1 ) a nd (2 ), t he mi sm at ch between the at trib ute values o f th e r adi o b ase sta t i ons du e t o a difference in EM (Element Manager) or NM (Network Manager), which i s disclose d in Non P at ent Lit eratu r e 1, can b e e li m inated, and t he
10 number of oc cu rren ces of han dov er failu r e o f th e m obi le t erm in al can
be red uc ed .
( 7) As a result o f ac hi evi ng th e o per atio ns (1 ) a nd (2 ), t h e lo ad balanci ng c on trol c an be p erfo rm ed bet we en th e radio b ase st atio ns , and traf f ic load di st rib utio n c an be per f or m ed appro pri atel y.
15 [0072]
The above exemplary embodiment has been described by using t he at tribu te v al ue d et erm ined f or each b ase st ati on, but th e at t ri but e valu e is not limit ed to thi s . An y o the r in fo rmati on can be us ed as th e at tribu te v alue as long as it c an di s cri min ate a h an dov er cont r ol, l oad
20 balanci ng, and b la cklist set tin g of eac h ba s e st ation .
[ 0073]
A second exemplary embodiment relates to a processing mode f or un if yin g att ri but es fo r c ells betwe en ra dio bas e st at io ns b y usin g
25 different communication mode s.
Ex pl an ati on o f S ystem Co nfi guratio n
The con f i guratio n o f a rad i o c ommu nicatio n s ys te m acco rd ing t o t he se cond ex em plary e mb odiment is t he s ame as th at o f t he fi rst ex em plar y e m bo dime nt . In t he f irs t ex em pla r y em bo dime nt , Fig. 1
30 i l l us trat es an LT E r adi o b as e sta ti on . T he se con d ex empl ar y
embodiment can be applied to, for example, a combination of a 3G communication mode for the radio base station 100 and an LTE commu nic ati on m od e f or th e r adi o b ase sta ti on 10 3. Th e s ec ond ex em plar y e m bo dime nt c an also b e app lie d to , fo r ex ample, a

27
combination of a 2 G communication mode for the radio base station
100 and an LTE communication mode for the radio base station 103.
In anot he r a lt ern ativ e , the seco nd ex emp lar y e m bod ime nt c an b e
applied to a combination of a 2G communication mode for the radio
5 base station 100 and a 3G communication mode for the radio base
st at ion 103. In thi s c ase , att rib ute v alu es (re gardin g a han dov er s ett ing a nd a blackli st s ett in g) o f ne ighbo ri ng c ell in fo rm ation bet we en di fferent r ad io b as e st atio ns ca n be exch an ged vi a a c ore netwo r k (core communication network) by using the RIM (RAN (Radio Access
10 Network) Informatio n M anagem ent ) discl os ed in N on P ate nt Lit erat ure
7 ( R IM i s h erein after r eferred to as " lo ca l area n et work in fo r matio n cont ro l "). Th e at tri but e va lues of th e nei ghbo r ing cell in form atio n between the radio base stations can be exchanged between LTE-advanced relay nodes B.
15 [0074]
Ex pl an ati on o f Op erat i on
In th e second ex emplary em bodim en t , th e operatio n th at is bas icall y t he s ame as t hat of the first ex empl ar y em bod ime nt i s carri ed out. Howev er, th e in fo rm atio n ab ou t th e attrib ute valu es of
20 neigh bo ri ng cel ls bet ween diffe r ent ra dio base st ation s i s ex c hanged
via a core network by using the RIM as described above.
The b ase st atio n 1 00 up dat es th e s et tin g of t he a ttri but e va l u es b y t he sa me met hod a s th at of t he fi r st ex emp la r y em bo dime nt . [ 0075]
25 Ex pl an ati on o f Ad vant ageous E ffe cts
The second exemplary embodiment provides not only the advantageo us ef f ects obt ain ed in th e fi rst exe m plary e mb odiment, but al s o the f ol l owi ng adv ant ageo us effe ct . ( 1 ) T he n ei ghb orin g cell i nformat ion c an b e sh ared b etw ee n radi o ba se
30 st at ion s with di ffere nt a ccess met hods .
[ 0076]
The operation of a third exemplary embodiment is the same as t hat of th e first or s ec ond ex e mpl ary em bodi m ent . The o per atio n o f

28
t he t hi rd ex emp l ary em bo di m en t di f f ers from th e operatio n of t he fi r st
or secon d ex em pl ar y emb odim ent in that the u pdat e of settin g s is
appli ed n ot onl y t o a h andov er s ett i ng a nd a b la cklist sett i ng , but also
t o an at t ribu te v al ue for s ettin g as to wh eth er a remo val f r om a
5 neigh bo ri ng cell list is permitt ed o r p ro hibi t ed (i sRe mov eAll owe d
disclosed in Non Patent Literature 3 and NoRemove disclosed in Non P aten t Li teratu r e 4) , a n attrib ute valu e indi cati ng a neigh borin g c ell pri orit y, a n attrib ute v al ue i nd icatin g whethe r o r no t the cell is a neigh bo ri ng cel l f or hand ove r , an at tribut e v al ue i ndi catin g w he the r o r
10 not the ce ll i s a n ei ghb orin g ce ll fo r prev entin g PC I du plic atio n
( collisio n / con fu si on ) , a n att ri but e valu e ind ic ating w het he r th e ex ecuti on o f S 1 /X 2H O i s p ermitt ed o r prohi bit ed, and a n att r ibut e valu e for d i rect /in di rect f o rw ardin g. [ 0077]
15 The nei ghb or a ttri but e val ue of EUt r an R elation cl ass t hat i s
di s close d i n N on P at en t Lit eratu re 3 is al so i ncl ud ed . As spe ci fi c at tribu te v alue s, (isR em ov eAll ow ed, is IC IC Info rmat ion SendA llo wed) i s in clud ed for eac h neigh bo ri ng cell, an d x 2Bla ck List, x2W hiteLi s t, x2HOBl ack Li s t, and th e li ke o f ENB Fun cti on class are i ncl ud ed fo r
20 ea ch n ei ghb orin g b as e st atio n . The s e at tr i but e v alu es are as so ci at ed
wi th i nt erfe r en ce b etw ee n cell s.
This exemplary embodiment aims to achieve a two-way i nt erfer en ce co ntrol b etween t he c ells A and B b y un ifyin g "isICICInformationSendAllowed " between the cells A and B.
25 [0078]
Ex pl an ati on o f S ystem Co nfiguratio n
The con f igu rat ion of a rad i o com mun icati on s ys t em acc ordin g t o t he t hi rd ex emp l ary em bo di m en t is th e sam e a s that of the fi r st exemplary embodiment.
30 Ex pl an ati on o f O p eratio n
The ope r ati on of th e r adi o comm uni catio n s ys t em acco r din g to t he t hi rd ex emp la r y em bo dime nt is th e sam e a s that of the fi r st exemplary embodiment. Ex pl an ati on o f Ad van tageous Eff ects

29 The third exemplary embodiment provides not only the
advantageo us effect s o bt ain ed i n th e firs t exempl ar y emb odim ent , b ut
al s o the f ol l owi ng adv antageo us effect s .
( 1 ) Not onl y th e h and ov er attrib ute valu es , b ut also th e attri but e v alu es
5 of th e a dja cent cel l i nformat ion can b e m ade kno wn t o each mobi le
t ermin al un d er con tr ol of a b as e st ati on .
( 2 ) In t erfer e nce b etw ee n cell s can b e pre ve nt ed .
[ 0 079]

10 A fourth exemplary embodiment relates to a method in which an
at tribu te v alue t o b e actu all y s et to a n ei ghborin g ce l l i s d ete r mi ned
f r om an at tri but e val ue of a r adi o b ase sta ti on and a n attribu te v alue of
a n ei ghbo r i ng r ad i o base st ation , as s umi ng th at th e ce lls regard a th ird
cell as t he neighb orin g cell, b ased on a n exchange of in fo r matio n ab out
15 t he at tribu t es o f t he cel l s betw een th e rad io base st at ions .
Ex pl an ati on o f S ystem Co nfi guratio n
F i g. 1 2 sho ws a co nfigu r at ion of a r adi o commu ni catio n s ys tem 2
ac cordin g t o the f ourth ex em pla r y e mbod im ent . A cell 201 o f a radio
bas e s tat ion 200 is ad di tion all y provi ded in t he co nfigu r at ion o f t he
20 r adio commu ni cation s ys tem 1 a cco rdin g t o t he fi rst e xempl ar y
embodiment.
[ 0080]
Ex pl an ati on o f O p eratio n
Whil e the c ells 10 1 an d 102 r ega r d t he ce ll 201 as a n ei ghbo rin g
25 cell as sh own i n F ig. 12 , thi s ex emp la r y em bo dime nt is i nte nded t o
unif y th e attrib ut e valu es an d elimi nat e a mism atc h b etw ee n the act ual
at tribu te setti ng fo r the c ell 201 b y th e cel l 101 an d th e act ual
at tribu te v alue se ttin g fo r t he cell 2 01 b y th e c ell 102 . An ex amp l e in
which a mism at ch b etw een the hand ov er attrib ute v alu es o ccur s as
30 des crib ed b elow will now b e c on si de r ed .
The act ua l h and ov er s etti ng of th e r adi o base sta ti on 1 00 from
t he cell 1 01 t o th e c el l 201 i ndicates "N o ".
The a ct ual han dover se tt i ng of th e radio b as e st ati on 103 from
t he cell 1 02 t o th e c el l 201 i ndicates "Y es".

30
If a mi sm at ch b et we en the att ri bu te v alu es o ccu r s as me nti on ed
abov e, the s ettin gs for each a ctu al hando ve r ca n be matc hed to "Yes"
or "No".
[ 0081]
5 The ope r ati on of th e f ourth ex em pla r y em bo dim ent is simil ar t o
t he op erat i on of th e first exempl ar y emb odim ent sh own i n Fig. 8. The
operation of th e fou rth ex em pla r y embo dim en t di ffers f r om t hat o f th e
fi rst ex em pl ar y em bo di men t in that th e r adi o b ase sta t i on 10 0 recei ves,
f r om t he ra di o bas e s t atio n 103 , th e att ri bu te v alu e relat ing to th e
10 r adio b as e s t ati on 20 0, which is in cluded in th e radi o bas e s tat ion 1 0 3,
as sho wn in Fig. 14 , comp ares th e re cei ved att r i bute va lue wit h th e
at tribu te v alue r elat i ng to th e r adi o b as e s tat io n 2 0 0 , whi ch is in clu ded
i n t he r adio b ase s tati on 10 0, as s ho wn in Fig. 14 , and u pdat es the
at tribu te v alue r elat i ng to th e base statio n 20 0.
15 [0082]
S im ilar l y, the b as e st atio n 1 03 re cei ves , from th e bas e s tatio n
100, the att ri bute v alu es rel ati ng t o th e ba s e s tati on 10 0 an d th e b as e
st at ion 2 00 as s hown i n Fig. 13, and comp ares th e rece ive d att r ibut e
valu es with th e att ri bute va lue rel ati ng t o th e r adi o b ase s tati on 2 00,
20 which is i ncl ud ed in th e r adi o b ase sta ti on 10 3, ther eb y makin g it
possib le t o change t he att ribut e val ue rel ati ng t o th e bas e st ation 20 0. [ 0083]
Accordin gl y, t he u nifi catio n of th e a ttri but e va lue s of th e
neigh bo ri ng cel ls i s app licabl e not o nl y to t he cas e o f uni fyi ng t he
25 at tribu te v alues b etw een t wo c ells, b ut also t o th e case o f un ifyin g t he
at tribu te v alues fo r th e ce ll 20 1 o f t he ra dio bas e st ation 200 b etw een t he cell 1 01 and t he cell 10 2 . C onse qu ent l y, t he o ccu rr en ce of th e f oll ow i ng h and ove r fail ure can be pre ven t ed .
The a ct ual han dover se tt i ng of th e radio b as e st ati on 100
30 between the cell 1 01 a nd t he cell 102 indi ca t es "Yes ".
The a ct ual han dover se tt i ng of th e radio b as e st ati on 100 between the cell 1 01 a nd t he cell 20 1 indica tes "N o ".
The a ct ual han dover se tt i ng of th e radio b as e st ati on 103 between the cell 1 02 a nd t he cell 20 1 indicat es "Yes ".

31
[ 0084]
The m obi le termi nal pres ent i n t he c ell 101 cann ot m ov e dire ctl y
f r om t he cell 1 01 to the c ell 201 .
However, in a case where the mobile terminal moves from the
5 cell 1 01 to th e ce ll 201 v ia th e cel l 10 2 , and t hen re turns fro m the cell
201 t o th e cell 1 01,
( 1 ) T he han dov er from th e ce ll 1 01 to th e c ell 102 is s uc ces s fu l.
( 2 ) T he han dov er from th e ce ll 1 02 to th e c ell 201 is s uccessful.
( 3 ) S i nce the h an d ove r from th e ce ll 201 to th e cell 1 01 is proh i bited,
10 t he m obile t ermin al mo ves t o an oth er cel l, o r a comm unic atio n
disconnection occurs .
As d es crib ed ab ove , a pl urali t y of neighb ori ng cell s c an uni f y
t he at tribu t e valu es fo r a ce rt ain cell , so that the number o f
oc cu rr en ces of ha ndo ve r fail ure be twe en th e c ells can b e redu ced. The
15 number of oc cu rren ces of han dov er failu r e and LB f ail ure c an al so b e
r educed b y a ppl yi n g t he uni f ic at ion o f a tt ri but e va l ues to a blackl is t
s ett ing , an LB s ett in g, a nd t he li ke .
[ 0085]
Ex pl an ati on o f Ad van tageous Eff ects
20 The fourth exemplary embodiment provides not only the
advantageo us effect s o bt ain ed i n th e firs t exempl ar y emb odim ent, but
al s o the f ol l owi ng adv antageo us effect s .
( 1 ) W h en both t he first cel l an d th e se con d cell of di ffere nt rad io b ase
st at ion s are adja ce nt t o the t hird c ell , the t hird cell a ttribu t e va lue o f
25 t he first c ell and t he th ird cel l a ttribut e v alu e of the s econ d c ell can be
unified.
( 2) As a res ult of a chi evin g the op erat io n (1 ) , t he n umb er o f
oc cu rr en ces of ha ndo ve r fail ure an d l oad bal an ci ng fai lu r e bet we en th e
fi rst cell a nd the t hi rd cell an d b et we en the s eco nd cell a nd t he t hird
30 cell can b e redu ce d .
[ 0086]

A f i ft h ex emp l ar y em bod im ent rel at es to a p roc es si ng mod e in
which " i s LBAll ow ed " can be uni fi ed be tw een r adi o b as e s tatio ns ev en

32
in a case where a MOBILITY CHANGE FAILURE message indicating
t hat lo ad b alan cin g i s not to b e ex ec ut ed is retu rned as a c au s e val ue
when a MOBILITY CHANGE REQUEST message is sent from a certain
r adio b as e s t ati on to a n eigh bo ri ng r adi o b ase sta t i on fo r th e att ri but e
5 valu e r el ating t o lo ad bal an cin g, to t r ansmit "is LB Allo wed ", tha t is,
when " i s LB Al l owed " is s et so as to i ndicate " N o ". [ 0087] Ex pl an ati on o f S ystem Co nfi guratio n
The con f igu rat ion of a rad i o com mun icati on s ys t em acc ordin g t o
10 t he fi fth exe mplary emb odiment is si mil ar to t he co nf ig uratio n of t he
fi rst exem pla r y em bo di men t s hown in Fi g. 1. Ex pl an ati on o f O p eratio n
In th e fifth ex emp lary em bodim ent , th e operatio n with th e
f oll owi ng setti ng s is co ns i dered .
15 - The t emp ora r y LB ( Lo ad Balanci ng ) s etti ng of th e radio b ase st ati on
100 from th e cel l 101 to th e c el l 102 i s O N.
- The t emp ora r y LB ( Lo ad Balanci ng ) s etti ng of th e radio b ase st ati on 103 from th e cell 10 2 to the cel l 101 i s O FF .
The ope r ati on will b e descr ibe d b elo w wit h ref ere nc e t o the
20 fl owchart o f Fi g. 15 .
The i nter-b ase -st ation m ess age p roc ess i ng uni t 11 1 in th e rad io
bas e s tat ion 1 0 0 r ea ds ou t th e in f or matio n abo ut the cel l 1 01, wh ich is
st ored in th e d at ab ase u ni t 11 2 in t he r adi o base st atio n 10 0, and se nds ,
t o t he ra di o bas e s tatio n 103 , the te mpo rary LB se tti ng from th e cell
25 102 t o th e cell 1 01 (S0 31 ).
S in ce t he te mporary LB sett ing fro m th e cell 1 02 to t he cel l 101
i s OFF , t he i nt er - ba s e-s tatio n messa ge p roc es si ng unit 111 in th e radio
bas e s tat ion 1 0 3 r ea ds ou t th e in f or matio n abo ut the cel l 1 02, wh ich is
st ored in t h e databas e unit 112 in th e r adi o base st atio n 10 3, and se nds,
30 t o t he r adio b ase s tati on 10 0, a c aus e va lue in clu din g a f ai lure m es s age
i ndicati ng t hat lo ad b al an cin g i s no t to b e ex e cuted (S0 32). [ 0088]
The i nter-b ase -st ation m ess age p roc ess i ng uni t 111 in th e rad io bas e s tat ion 1 0 0 r ec ei ves th e f ailu r e m ess age from t he radi o bas e

33
st at ion 1 0 3 and s ets "OFF" a s th e ac tual LB s ett i ng of th e radio base
st at ion 1 00 from th e cell 1 01 to th e c ell 102 , an d t he d ata ba s e u nit 11 2
i n t he r adio b ase s tati on 10 0 s tores th e a ctu al LB s etti ng (S03 3).
[ 0089]
5 The i nter-b ase -st ation m ess age p roc ess i ng uni t 111 in th e rad io
bas e s tat ion 1 0 0 r ea ds ou t, f ro m th e da tabas e uni t 112, the cell
i nformat ion parti all y in cludi ng the updated a ctu al LB set tin g (OFF) o f
t he rad io b ase st atio n 1 00 from the cel l 101 to t he cell 10 2 , and s end s
t he read in f orm ati on t o th e ra di o bas e s tatio n 103 . Th e int er-b as e-
10 st at ion m essage p r oc es sin g unit 11 1 in th e r adi o b ase sta t i on 10 3
r ecei ves th e actu al LB set t i ng ( OFF), an d s ends th e r ecei ve d s et tin g to
t he datab ase uni t 112 in th e r adi o b ase sta ti on 10 3. T he d ata base u nit
112 in th e r adio b ase st ati on 10 3 st ore s t h e a ctu al LB set tin g (OFF ).
Th en th e dat abas e unit 11 2 in the r adio bas e s tatio n 10 3 upd ates th e
15 actu al LB s ettin g ( OFF) (S03 4).
[ 0090]
Aft er th at , t he ra dio co mmun ic at ion proc essin g uni t 1 10 in t he
r adio b as e s t ati on 10 0 tra nsmit s t he in fo r mati on el eme nt s o f t he
neigh bo ri ng cel l 102 , whi ch are read out from t he d at ab as e un i t 1 12, to
20 t he mob ile t ermin al 104 u nd er cont ro l of t he cel l 101 (S035 ) .
[ 0091]
The radi o ba s e station 1 0 0 t r ansm its, to t he radio bas e s tati on
103, "isLBAllowed" included in MOBILITY CHANGE REQUEST.
After that, the radio base station 103 returns MO BILITY CHANGE
25 FAILURE including "isLBAllowed" to the radio base station 100. In
this exemplary embodiment, as shown in Fig. 16, "isLBAllowed" is
i nclu ded i n t he c a us e v al ue in th e co nfigur ati on of the M O BIL ITY
CHANGE FAILURE message.
[ 0092]
30 Ex pl an ati on o f Ad van tageous Eff ects
The fi fth ex em pl ary em bo dim en t p ro vi des no t onl y th e advantageo us effect s o bt ain ed i n th e firs t exempl ar y emb odim ent , but al s o the f ol l owi ng adv antageo us effect s . ( 1 ) In a c as e wh ere a mi smatch bet ween the at trib ute v al ue s fo r load

34
balanci ng o f t he r adi o b ase sta ti on s o ccurs, e ven when a ce r t ain radio
bas e s tat ion s ends a n a ttribut e v al ue for loa d bal anc ing to a
neigh bo ri ng r ad io b as e st atio n an d t he ne igh bo ring rad io b as e sta ti on
r et urns a f ailu re m ess age , t he rad io b ase st ati on whi ch h as r ecei ve d the
5 f ai lure m essage ca n m atch the attrib ute v alue f or l oad bal an ci ng wi th
t hat o f th e neigh bo ri ng r adi o b as e statio n . [ 0093]
While an operation according to other exemplary embodiment is
10 simil ar to t hat of th e f irs t ex em pla r y embo dim ent , th e ex ch ange of t he
neigh bo ri ng cel l in fo r m atio n is p erf orm ed n ot via an int erfa ce bet ween bas e s tat ions, b ut vi a t he r adi o b ase st at ion cont r ol dev ice 3, wh ic h cont ro ls radi o base s tati ons , or t he rel a y devic e 4 . For ex amp l e , th e r adio b as e s t ati on 10 0 ex ec ut es a net work mon ito rin g mod e to re ad
15 notificati on i nforma tio n abou t the cell 1 02 o f the radi o bas e sta tion
103, a nd acqui r es th e at tri but e val ue co r r espo nd in g to th e ne i ghbo r ing i nformat ion ab out the cel l 1 02. In a nother alt ern ati ve , t he radio b as e st at ion 1 0 0 m a y in st r uct th e mobi l e t erminal 104 to acq ui re th e at tribu te v alue co r r es pondi ng to th e n eigh borin g in f or matio n abo ut the
20 neigh bo ri ng cel l 102 from t h e notifi cat ion in fo r m atio n ab out th e ce ll
102 of th e radi o ba s e station 103 , a nd the ra dio base st at ion 1 0 0 m a y ca use t he m obil e te rm in al 1 04 t o in f orm t he ra dio bas e s tatio n 100 of t he in fo r matio n. [ 0094]
25 Whil e the algo r it hm fo r un if yi ng at tribut e va lue s is ca r ri ed out
i n the r adio b ase s tati ons a cco rdi ng t o th e first ex empl ar y emb odim en t , t he r adio b as e s t atio n co nt rol d evi ce 3, whi ch co ntrols the radio bas e stations, the relay device 4, O&M, EM (Element Manager), NM ( Network M an ager ) , a gat ew ay, an d t he lik e m a y ca r r y out th e
30 al gorit hm for uni f yi ng a tt ribu te v alu es .
Whil e the unificatio n o f attrib ut e v alu es b etw ee n t he radio b as e st at ion s i s autom aticall y p erformed in the fi r st ex em pla r y em bo dime nt , t he at tribu t e v alu es ma y be man uall y m atc he d b etw een th e rad io b ase st at ion s after th e a tt ri but e v alu es are tem po r ari l y t ransmit t ed t o th e

35 EM via t he r adio b ase st ati on s an d a mismat ch b etw een the at tribu te valu es i s checked b y an ope r ator. [ 0095]
Whil e the at tribu te v alue s de f in ed i n the 3G PP s tan da r d are u s ed
5 t o d escri be t he ab ove ex em plary e m bodim ents, t he attrib ut e va lue s are
not limit ed th es e v al u es . A ny i nfo rm at ion m a y be u s ed a s the att ri bute valu es as long as t he info rm ati on has th e s am e me an ing as th at o f the abov e -m entio ne d a ttri but e va lue s. [ 0096]
10 The communication control method described in the above
exemplary embodiments may be implemented by using a semiconductor processin g devi ce incl udin g an AS IC (Ap pli catio n Sp ecif ic In tegr at ed Circuit). These processes may be implemented by causing a comp uter s ys tem inc l udin g at l east one p ro cess or (e . g. , a m icro pro ces so r , an
15 MP U, or a DSP ( Di gi t al S ign al P roc ess or ) ) to ex ecut e a p rogra m.
S peci f ic all y, one o r mo r e p rogra ms in clu din g a n inst ructi on s et fo r ca usin g th e c om pu ter s yst em to ex ec ute an algo r ith m rel ati ng to t r ansmission s ign al p ro cess ing or re cepti on si gnal pro ce ssing may b e creat ed , and th e p r ograms ma y be s upp lie d to a co m put er .
20 [0097]
These programs can be stored and provided to a computer using an y t yp e o f non - tra nsit or y co m put er r ea dabl e m edi a. N on -tran si tory compu ter re adable m edi a i ncl ud e an y t yp e of t angi ble sto r age m edi a. Ex ampl es of non -t r ans ito r y c om pu ter r ead able m edi a incl ud e m agn eti c
25 st orage m edia ( su ch as f lop p y d isks, magneti c tap es , h ard disk d ri ves,
et c.), opti cal m agn et i c s t ora ge med ia (e.g. magnet o -opt ica l dis ks ) , C D -ROM (Read Only Memory), CD-R, CD-R/W, and semiconductor memories (such as mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory), etc.).
30 The programs may be provided to a computer using any type of
t r ansito r y co mp ute r r eadable m edia. Exa mples o f t r an si tor y co m put er r ead abl e medi a in clu de el ect r ic si gna ls, optical signals, and el ectrom agn etic wa ves. Tran si tory c ompu te r reada bl e medi a ca n provid e th e pro gr a m s t o a com put e r vi a a w ired commu ni cation l ine,

36
su ch as ele ctric w ire s and op tic al fi be r s, or a r adi o commu ni catio n l ine.
[ 0098]
The prese nt i nv ent ion is not li mit ed to t he abov e ex empl ar y
embodiments and can be modified as needed without departing from the
5 s cope o f t he in ve ntion . Fo r ex amp le , the pres ent i nv en tion i s also
appli cable to h igh er comm uni cat io n sta nda rds suc h as fourth and
hi gher gen erati on c ommuni cation standa r ds ( f or exam ple , LT E -
Advanced, IMT-Advanced, and WiMAX2).
[ 0099]
10 Moreover, the above exemplary embodiments are merely
ex am ples o f t he appli ca ti on o f t he techn ic al i de a th at th e p res en t
i nven tor h as co nc eiv ed . In oth er wo r ds , th e te chnical i de a is no t
limited to the above exemplary embodiments and can be modified in
va riou s m anners a s a matte r o f c ourse.
15 [0100]
The whole or part of the exemplary embodiments disclosed
abov e can b e d es crib ed as, but not l imit ed to, th e fo llo win g
su pp lem ent ar y not es.
(S uppl eme nta r y no te 1 )
20 A communication control method comprising :
t ransmitt ing, b y a s econ d r adi o b ase st atio n ad j acent t o a firs t
r adio b as e s t ati on, an at tribu t e value r el ati ng to a second cell to the
fi rst rad io base st ation , th e seco nd c ell being u nde r control of th e
s econ d r adi o b ase statio n;
25 r ecei vin g, by t he f ir st radio b ase st at ion, t he attrib u te v alu e
r el ati ng to th e s ec ond cell;
comp arin g, b y t he first radi o bas e sta tion, the att rib ute val ue
r el ati ng to th e s ec ond cell wi t h an attrib ut e v alu e relat ing to a fi r st
cell , th e fi rst cel l bein g und er cont r ol of the fi r st rad io b as e st ati on;
30 and
ex ecuti ng, b y th e f ir st radio b ase st at ion, proc ess i ng for
m atchin g t he att r ibu te val ue r el ati ng to the s eco nd cell wit h t he
at tribu te v alue r elat i ng to t he first cel l i n ac co rdance wi th a
predetermi ne d crite ri on, whe n the recei ve d attrib ute v alu e relatin g to

37 t he s econd cell is di f ferent fro m th e at t ri but e va l ue rel atin g t o th e f i rst cell . (S uppl eme nta r y no te 2 )
The communication control method according to Supplementary
5 note 1 , wher ein the at tribu te val ue i ncl udes at l ea st on e of h ando ve r
pe rmission /prohi b itio n in fo rm atio n , me asu rem ent
pe rmission /prohi bitio n in fo rm atio n , a nd lo ad distrib uti on con trol
pe rmission /prohi bitio n in fo rm atio n.
(S uppl eme nta r y no te 3 )
10 The communication control method according to Supplementary
note 1 o r 2 , wh ere in t he attrib ut e v alu e r el at ing to t he secon d cell is
added to in f orm ati on asso ci at ed wi t h a nei ghbo ri ng cell and is
t r ansmitt ed from t he s econd r adi o b ase sta ti on to t he fi rst radio b as e
st at ion .
15 (Supplementary note 4)
The communication control method according to any one of
Supplementary notes 1 to 3, wherein when a communication mode for
t he fi rst r ad io b as e st atio n is di ffere nt fro m a c ommu ni cat ion m od e fo r
t he se cond radi o ba s e station , t he a tt ri but e valu e is transmit te d and
20 r ecei ved via a com municati on n et work to which th e first radio b as e
st at ion and t he secon d ra dio bas e s ta tio n a r e conn ected . (S uppl eme nta r y no te 5 )
The communication control method according to Supplementary
note 1 , w he rei n the at tribu te v al ue i s t r an sm itte d and r ec eiv ed d urin g a
25 cont ro l of l ocal a r ea n et work info rm at ion .
(S uppl eme nta r y no te 6 )
The communication control method according to Supplementary
note 1 , w he rei n loa d di st ribut i on co ntrol p ermi ss ion/ proh ib itio n
i nformat io n i s u s ed as an att ribu te v alu e d urin g a lo ad di strib utio n
30 cont ro l.
(S uppl em entar y n o t e 7 )
A communication control method comprising :
acqu irin g an att r ibut e v alu e relatin g to a firs t ce ll u nd er cont rol of a fi r st rad io b as e st atio n, and acqu ir i ng an att ribu te val ue rel atin g

38 t o a s ec ond cell un de r co ntrol o f a se con d radio b ase s tat ion ; and
m atchin g t he att r ibu t e val ue r el ati ng to the fi r st cell w ith the
at tribu te v alue r elat i ng to t he s eco nd c ell in a cc ordan ce wit h a
predetermi ne d crite ri on, whe n the acqu ired at tribu te value r el ati ng to
5 t he first c ell is d ifferent fr om the ac q ui r ed att ri but e v alu e rel atin g t o
t he s econd cell. (S uppl eme nta r y no te 8 )
The communication control method according to any one of
S uppl ementa r y no te s 1 to 7, wh erein th e at t ri but e valu e is t ransmitt ed
10 and recei ve d vi a a r adio b as e s tatio n co ntrol d evi ce that con t ro ls a
radio base station. (S uppl eme nta r y no te 9 )
A radio communication system comprising:
a fi rst ra dio bas e s t atio n; an d
15 a seco nd radio base stati on a dj acen t to t he fi rst radi o ba s e
st at ion , w he rei n
t he s ec ond rad io b ase st ati on c om prises:
m ean s fo r t ran sm ittin g, to t he first ra di o bas e st ation , an
at tribu te v alue r elat i ng to a s econ d cel l under con t ro l of th e secon d
20 r adio b as e s t ati on, an d
t he first radio base s tati on c om prise s:
m ean s fo r receiv in g, by t he fi rs t radi o bas e sta tion, th e at tribu te v alue r elat i ng to t he s eco nd c ell; and
m ean s fo r m at chi ng th e att ri but e v al ue re l atin g to the
25 s econ d ce ll with an a t t ri but e va l ue rel atin g to a fi rs t cel l i n acco rd an ce
wi th a p r ed et ermi ne d criteri on, wh en th e attrib ute valu e rel at in g t o th e
s e co nd cell is di f f ere nt fro m the at trib ute value r el ati ng to t he first
cell , th e fi rst cel l bein g und er cont r ol of the fi r st rad io b as e st ati on .
(S uppl eme nta r y no te 10)
30 The radio communication system according to Supplementary
note 9 , w he rei n the at tribu te val ue i ncl udes at l ea st on e of h ando ve r pe rmission /prohi bitio n in fo rm atio n , me asu rem ent
pe rmission /prohi bitio n in fo rm atio n , a nd lo ad distrib uti on con trol pe rmission /prohi bitio n in fo rm atio n.

39 (S uppl eme nta r y no te 11)
The radio communication system according to Supplementary
note 9 , w he rei n the at tribu te v al ue r ela t i ng to t he s econd cell is add ed
t o i nform at ion a s s ociated with a n ei gh bori ng cel l an d is t rans mitt ed
5 f r om t he secon d ra di o bas e st ation t o th e f i rst r adi o b ase st at i on .
(S uppl eme nta r y no te 12)
The radio communication system according to any one of
Supplementary notes 9 to 11, wherein when a communication mode for
t he first r ad io b as e st atio n is di ffere nt fro m a c ommu ni cat ion m od e fo r
10 t he s econd radi o ba s e station , t he a t t ri but e va lu e is tra ns mit t ed a nd
r ecei ved via a co mmu ni cation netwo r k to which th e first radio b as e st at ion and t he secon d ra dio bas e s ta tio n a r e conn ected . (S uppl eme nta r y no te 13)
The radio communication system according to Supplementary
15 note 1 2, wh erein t he att ribut e val ue is t r ansmitt ed a nd receiv ed du ri ng
a cont r ol o f l ocal are a net work in f ormati on. (S uppl eme nta r y no te 14)
The radio communication system according to Supplementary
note 9 , w he rei n loa d di st r ibut io n co ntrol p ermi ss ion/ proh ib itio n
20 i nformat ion is use d as an att ribu t e valu e d urin g a l oa d di st ri buti on
cont ro l. (S uppl eme nta r y no te 15)
A radio communication system comprising:
m ean s fo r a cqui r ing a n attrib ut e v alu e relat in g t o a fir s t ce ll
25 under cont r ol o f a first rad i o base st ation , a nd acq uirin g an attribut e
valu e r e l atin g to a s econd cell u nde r control of a seco nd radi o ba se st at ion ; and
m ean s fo r m at chi ng th e att ri but e v al ue re l atin g to the fi r st cell
wi th th e at t ri but e valu e rel atin g t o th e s econ d ce l l i n acc ordan ce w ith a
30 predetermi ne d crite ri on , wh en th e ac qui red att ribu te v alue rela tin g to
t he first c ell is d ifferent fr om the ac qui red at tri but e va lue rel ati ng t o t he s econd cell. (S uppl eme nta r y no te 16)
The radio communication system according to any one of

Supplementary notes 9 to 15, wherein the attribute value is transmitted and received via a radio base station control device that controls a radio base station. (Supplementary note 17)
A radio base station comprising:
means for acquiring an attribute value relating to a first cell under control of a neighboring radio base station; and
means for matching the attribute value relating to the first cell with an attribute value relating to a second cell in accordance with a predetermined criterion, when the acquired attribute value relating to the first cell is different from the attribute value relating to the second cell, the second cell being under control of the radio base station. (Supplementary note 18)
The radio base station according to Supplementary note 17, wherein the attribute value includes at least one of handover permission/prohibition information, measurement permission/prohibition information, and load distribution control permission/prohibition information. (Supplementary note 19)
The radio base station according to Supplementary note 17, wherein the attribute value relating to the second cell is added to information associated with a neighboring cell and is transmitted from the second radio base station to the first radio base station. (Supplementary note 20)
The radio base station according to any one of Supplementary notes 17 to 19, wherein when a communication mode for the first radio base station is different from a communication mode for the second radio base station, the attribute value is transmitted and received via a communication network to which the first radio base station and the second radio base station are connected. (Supplementary note 21)
The radio base station according to Supplementary note 17, wherein the attribute value is transmitted and received during a control of local area network information.

(Supplementary note 22)
The radio base station according to Supplementary note 17, wherein load distribution control permission/prohibition information is used as an attribute value during a load distribution control. (Supplementary note 23)
The radio base station according to any one of Supplementary notes 17 to 22, wherein the attribute value is transmitted and received via a radio base station control device that controls a radio base station. (Supplementary note 24)
A non-transitory computer readable medium causing a computer to execute processing comprising:
acquiring an attribute value relating to a first cell under control of a first radio base station, and acquiring an attribute value relating to a second cell under control of a second radio base station; and
matching the attribute value relating to the first cell with the attribute value relating to the second cell in accordance with a predetermined criterion, when the acquired attribute value relating to the first cell is different from the acquired attribute value relating to the second cell. (Supplementary note 25)
The non-transitory computer readable medium according to Supplementary note 24, wherein the attribute value includes at least one of handover permission/prohibition information, measurement permission/prohibition information, and load distribution control permission/prohibition information. (Supplementary note 26)
The non-transitory computer readable medium according to Supplementary note 24, wherein the attribute value relating to the second cell is added to information associated with a neighboring cell and is transmitted from the second radio base station to the first radio base station. (Supplementary note 27)
The non-transitory computer readable medium according to any

one of Supplementary notes 24 to 26, wherein when a communication mode for the first radio base station is different from a communication mode for the second radio base station, the attribute value is transmitted and received via a communication network to which the first radio base station and the second radio base station are connected. (Supplementary note 28)
The non-transitory computer readable medium according to Supplementary note 25, wherein the attribute value is transmitted and received during a control of local area network information. (Supplementary note 29)
The non-transitory computer readable medium according to Supplementary note 24, wherein load distribution control permission/prohibition information is used as an attribute value during a load distribution control. (Supplementary note 30)
A non-transitory computer readable medium causing a computer to execute processing comprising:
acquiring an attribute value relating to a first cell under control of a first radio base station, and acquiring an attribute value relating to a second cell under control of a second radio base station; and
matching the attribute value relating to the first cell with the attribute value relating to the second cell in accordance with a predetermined criterion, when the acquired attribute value relating to the first cell is different from the acquired attribute value relating to the second cell. (Supplementary note 31)
The non-transitory computer readable medium according to any one of Supplementary notes 25 to 30, wherein the computer is caused to execute transmission and reception of the attribute value via a radio base station control device that controls a radio base station. [0101]
While the present invention has been described above with reference to exemplary embodiments, the present invention is not limited to the above exemplary embodiments. The configuration and

details of the present invention can be modified in various manners which can be understood by those skilled in the art within the scope of the invention. [0102]
This application is based upon and claims the benefit of priority from Japanese patent application No. 2012-249670, filed on November 13, 2012, the disclosure of which is incorporated herein in its entirety by reference.
Reference Signs List
[0103]
1 RADIO COMMUNICATION SYSTEM
2 RADIO COMMUNICATION SYSTEM
3 RADIO BASE STATION CONTROL DEVICE
4 RELAY DEVICE

100 RADIO BASE STATION
101 CELL
102 CELL
103 RADIO BASE STATION
104 MOBILE TERMINAL
105 MOBILE TERMINAL

110 RADIO COMMUNICATION PROCESSING UNIT
111 INTER-BASE-STATION MESSAGE PROCESSING UNIT
112 DATABASE UNIT

200 RADIO BASE STATION
201 CELL

WE CLAIM:
1. A communication control method comprising:
transmitting, by a second radio base station adjacent to a first
radio base station, an attribute value relating to a second cell to the first radio base station, the second cell being under control of the second radio base station;
receiving, by the first radio base station, the attribute value relating to the second cell;
comparing, by the first radio base station, the attribute value relating to the second cell with an attribute value relating to a first cell, the first cell being under control of the first radio base station; and
executing, by the first radio base station, processing for matching the attribute value relating to the second cell with the attribute value relating to the first cell in accordance with a predetermined criterion, when the received attribute value relating to the second cell is different from the attribute value relating to the first cell.
2. The communication control method according to Claim 1,
wherein the attribute value includes at least one of handover
permission/prohibition information, measurement
permission/prohibition information, and load distribution control
permission/prohibition information.
3. The communication control method according to Claim 1 or 2, wherein the attribute value relating to the second cell is added to information associated with a neighboring cell and is transmitted from the second radio base station to the first radio base station.
4. The communication control method according to any one of Claims 1 to 3, wherein when a communication mode for the first radio base station is different from a communication mode for the second

radio base station, the attribute value is transmitted and received via a communication network to which the first radio base station and the second radio base station are connected.
5. The communication control method according to Claim 4, wherein the attribute value is transmitted and received during a control of local area network information.
6. The communication control method according to any one of Claims 1 to 5, wherein the attribute value is transmitted and received via a radio base station control device that controls a radio base station.
7. A communication control method comprising:
acquiring an attribute value relating to a first cell under control of a first radio base station, and acquiring an attribute value relating to a second cell under control of a second radio base station; and
matching the attribute value relating to the first cell with the attribute value relating to the second cell in accordance with a predetermined criterion, when the acquired attribute value relating to the first cell is different from the acquired attribute value relating to the second cell.
8. A radio communication system comprising:
a first radio base station; and
a second radio base station adjacent to the first radio base station, wherein
the second radio base station comprises:
means for transmitting, to the first radio base station, an attribute value relating to a second cell under control of the second radio base station, and
the first radio base station comprises:
means for receiving, by the first radio base station, the attribute value relating to the second cell; and

means for matching the attribute value relating to the second cell with an attribute value relating to a first cell in accordance with a predetermined criterion, when the attribute value relating to the second cell is different from the attribute value relating to the first cell, the first cell being under control of the first radio base station.
9. A radio base station comprising:
means for acquiring an attribute value relating to a first cell under control of a neighboring radio base station; and
means for matching the attribute value relating to the first cell with an attribute value relating to a second cell in accordance with a predetermined criterion, when the acquired attribute value relating to the first cell is different from the attribute value relating to the second cell, the second cell being under control of the radio base station.
10. A non-transitory computer readable medium causing a computer to execute processing comprising:
acquiring an attribute value relating to a first cell under control of a first radio base station, and acquiring an attribute value relating to a second cell under control of a second radio base station; and
matching the attribute value relating to the first cell with the attribute value relating to the second cell in accordance with a predetermined criterion, when the acquired attribute value relating to the first cell is different from the acquired attribute value relating to the second cell.