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Translation of PCX specification
Discontinuous Reception Method, Mobile Station, Base Station and Wireless
Communication System
Field
5 [01] The invention relates to discontinuous reception in wireless communication system, and
particularly to the discontinuous reception under carrier aggregation (CA).
Background
[02] The future LTE-A (Long Term Evolution Advanced) system will support a transmission
10 bandwidth up to lOOMHz, while the maximum transmission bandwidth supportable by the LTE
(Long Term Evolution) standard is 20MHz. Thus to achieve the higher transmission bandwidth, it
requires to aggregate multiple carriers. Carrier aggregation (CA) is a technique of aggregating
multiple carriers for combined transmission, which is proposed by 3 GPP (3rd Generation
Partnership Project) to meet the high transmission bandwidth requirement of the future mobile
15 systems. Carrier aggregation may be classified into consecutive carrier aggregation and
non-consecutive aggregation based on the positions of the carriers that are aggregated on the
spectrum. LTE-A will support both of the two CA scenarios. While introducing the CA technique,
3GPP also considers its backward compatibility, which means that user equipments (UEs)
supporting CA and UEs not supporting CA will co-exist for a long time in the future. A CA
20 supporting UE can be connected to a plurality of component carriers (CCs) at the same time, and a
UE not supporting CA can be connected to only a certain CC.
[03] With the introduction of the CA technique, each cell may be configured with a plurality of CCs
and a UE may also use multiple of CCs. Not all the UEs use all the CCs of the corresponding cell.
Those CCs used by the UE are referred to as configured CCs and those not in use are called as
25 non-configured CC. The so called configured / non-configured is defined with respect to each UE.
That is, different UEs may have different configured / non-configured CCs
[04] The configured CCs may be further classified as activated CC and deactivated CC. The UE
transmits data over the activated CC. No data transmission is performed over the deactivated CC.
The deactivated CC does not support difficult measurements such as CQI (Channel Quality
30 Indicator).
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[05] The advantage of introducing activated / deactivated CC lies in that, the CCs that are not in use
temporarily can be set in the deactivated state so that the power of the UE may be saved. The
deactivated CC may be switched into the activated state rapidly via MAC signaling, and unlike the
non-configured CC, the deactivated CC can perform measurement thereon and the measurement
5 information of the deactivated CC can be used by the base station to set related parameters. In this
way, the requirements of the burst data services can be better met.
[06] In LTE-A, each cell has a plurality of CCs and each UE can be allocated with a plurality of
CCs. LTE-A defines the concept of "special cell". Each UE has only one special cell and the special
cells of different UEs may be different from each other. Over the special cell, the system provides
10 security input function and NAS (non-access) layer information to the UE. From the view point of
the system, each CC is equivalent to a cell, and is allocated with globally unique cell identification.
From the view point of the UE, even if the UE is allocated with a plurality of CCs, it can only see
one cell, i.e. the special cell, while the other CCs are used as uplink and downlink resources.
[07] LTE-A introduces the concept of PCC (primary component carrier). Each UE is configured
15 with an uplink PCC and a downlink PCC. The uplink control information is transmitted over the
uplink PCC. The radios link failure (RLF) information is monitored over only the primary cell
(Pcell). The cell corresponding to the PCC is thus called as primary cell (Pcell), and the other cells
are called as secondary cell (Scell). Pcell is the special cell.
[08] To save the power of the mobile station, LTE Rel-8 introduces the concept of DRX
20 (Discontinuous Reception) such that the listening of PDCCH (Physical Downlink Control Channel)
is stopped when there is no data transmission over the air interface, thereby reducing the operation
of the receiver, decreasing the power consumption of the mobile station and lengthening the life of
the battery.
[09] Some concepts of DRX in LTE Rel-8 are explained blow.
25 [10] 1. On Duration time: a UE wakes from dormant state and goes into the on duration, and starts
an on duration timer. During the on duration, the UE receives the information of PDCCH. On
PDCCH, there is signaling information related to the UE which is transmitted fi-om the network side
to the UE, such as control information of resource allocation, such as confirmation, power control,
resource allocation and reallocation, etc. If the UE can successfully decode the information of the
30 PDCCH signal indicating the initial uplink or downlink user data transmission, it starts a
discontinuous reception inactivity timer and goes into the inactivity time; otherwise, the UE goes
into the dormant state after the on duration time ends (i.e. expire of the on duration timer)
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[II] 2. Inactivity time: after the UE successftilly decodes the PDCCH channel, the UE starts the
DRX inactivity timer and goes into the inactivity time. During the inactivity time, the UE continues
listening to the PDCCH and related control channels. If the UE successfully decodes the PDCCH
and related control channels before the expire of the DRX inactivity timer, the UE restarts the DRX
5 inactivity timer and once again goes into the inactivity time; otherwise, the UE goes into the
dormant time after the expire of the DRX inactivity timer, and proceeds to the next DRX cycle.
[12] 3. Active time: during the active time, the UE monitors the PDCCH channel; the on duration
time and the inactivity time both belongs to the active time.
[13] 4. Dormant time: the UE is in an off state during the dormant time.
10 [14] 5. HARQ RTT Timer (Hybrid Automatic Retransmission Request Round-Trip Time): this timer
is used for the timing of the least time interval predicted to be used for downlink retransmission of
the UE. When a new downlink data transmission is detected, the HARQ RTT Timer is started, and
if the received data is correctly decoded upon the expiring of the HARQ RTT Timer, the UE goes
into the dormant time and proceeds to the next DRX cycle.
15 [15] 6. DRX retransmission timer: this timer is used for the timing of the time predicted to be
needed for downlink retransmission for the UE. When the HARQ RTT Timer expires and there
exists data that has not been successfully decoded in the corresponding HARQ buffer, the DRX
retransmission timer is started, and this time the PDCCH is listened to.
[16] 7. Contention Resolution: once the uplink message contains C-RNTI (Cell Radio Network
20 Temporary Identifier which is allocated by wireless network controller) MAC control element or
the uplink message contains CCCH SDU (Common Control Channel Service (CCCH) Data Unit
(SDU)), the UE starts a contention resolution timer and monitors the PDCCH until the contention
resolution timer expires. When receiving the massage indicating the successful contention
resolution, the contention resolution timer is stopped.
25 [17] 8. DRX short cycle timer: when the DRX inactivity timer expires, the DRX short cycle timer is
started. If the DRX short cycle timer expires, a long cycle DRX is started. The UE can be
configured as short DRX cycle and long DRX cycle. The short DRX cycle is optional. In the case
that the short DRX cycle is configured, after entering into the short DRX cycle state, the UE goes
into the long DRX cycle if it does not listened its own PDCCH packet after the DRX short cycle
30 timer expires. If the short DRX cycle is not configured, the UE directly goes into the long DRX
cycle.
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[18] If a DRX MAC (Media Access Control) control information unit is received, it means that the
base station requires the UE to go into the dormant state. At this time, the on duration timer and the
DRX inactivity timer are stopped, but the time related to the retransmission is not stopped.
[19] With the introduction of CA, a mobile station can simultaneously use a plurality of CCs, which
5 makes the DRX operation environment more complex. In addition, under CA scenarios, the mobile
station and the protocol design face the huge challenge of high power consumption. How to make
the DRX, which is an important means for saving the power of the mobile station, effectively work
under CA scenarios is another issue to be solved.
10 Summary
[20] The following presents a simplified summary of the invention in order to provide a basic
understanding of some aspects of the invention. This summary is not an exhaustive overview of the
disclosure. It is not intended to identify key or critical elements of the disclosure or to delineate the
scope of the disclosure. Its sole purpose is to present some concepts in a simplified form as a
15 prelude to the more detailed description that is discussed later.
[21] The invention is directed to solve the above technical problem.
[22] According to an aspect of the invention, there is provided a discontinuous reception method in
a wireless communication system including determining to employ a consecutive carrier
aggregation or a non-consecutive carrier aggregation; in case of the consecutive carrier aggregation,
20 for a primary cell and each of the secondary cells, setting a common on-duration timer (on Duration
Timer) and/or a common discontinuous reception inactivity timer (DRX inactivity timer); and in
case of the non-consecutive carrier aggregation, for a primary cell and each of the secondary cells,
setting separate on-duration timers and/or separate discontinuous reception inactivity timers.
[23] According to another aspect of the invention, there is provided a discontinuous reception
25 method in wireless communication system, carrier activating/deactivating operation separate from
the carrier configuration process is used in the wireless communication system, and the method
includes: for a primary cell and each of secondary cells, setting a common on-duration timer and/or
discontinuous reception inactivity timer.
[24] According to another aspect of the invention, there is provided a mobile station including a
30 determining unit configured to determine to employ a consecutive carrier aggregation or a
non-consecutive carrier aggregation; and
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[25] a setting unit configured to, in case of the consecutive carrier aggregation, set a common
on-duration timer and/or a common discontinuous reception inactivity timer for a primary cell and
each of secondary cells; and in case of the non-consecutive carrier aggregation, set separate
on-duration timers and/or separate discontinuous reception inactivity timers for the primary cell and
5 each of the secondary cells.
[26] According to another aspect of the invention, there is provided a mobile station including an
activating/deactivating unit configured to perform carrier activating/deactivating operation separate
from the carrier configuration process; and a setting unit configured to set a common on-duration
timer and/or discontinuous reception inactivity timer for a primary cell and each of the secondary
10 cells.
[27] According to another aspect of the invention, there is provided a base station including a
transmitting unit for sending an instruction to the mobile station to control the mobile station to
perform the method mentioned above.
[28] According to another aspect of the invention, there is provided a wireless communication
15 system including the above mobile station and the above base station.
[29] In addition, an embodiment of the invention provides computer program for realizing the
above methods.
[30] Furthermore, an embodiment of the invention provides a computer program product in the
form of computer readable medium on which there are recorded computer program codes for the
20 above methods.
[31] The invention realizes the discontinuous reception under CA, thereby saving the power of the
mobile station.
[32] The above and other advantages of the disclosure can be more apparent with reference to the
best mode of the invention in conjunction with the accompanying drawings.
25
Brief Description of Drawings
[33] The above and other objects, features and advantages of the embodiments of the disclosure can
be better understood with reference to the description given below in conjunction with the
accompanying drawings, throughout which identical or like components are denoted by identical or
30 like reference signs.
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[34] Figure 1 is a schematic diagram showing a first CA scenario according to the related art;
[35] Figure 2 is a schematic diagram showing a second CA scenario according to the related art;
[36] Figure 3 is a schematic diagram showing a third CA scenario according to the related art;
[37] Figure 4 is a schematic flow chart showing a discontinuous reception method in a wireless
5 communication system according to an embodiment of the invention;
[38] Figure 5 is a schematic flow chart showing a discontinuous reception method in a wireless
communication system according to another embodiment of the invention;
[39] Figure 6 is a schematic block diagram showing a mobile station according to an embodiment
of the invention;
10 [40] Figure 7 is a schematic block diagram showing a mobile station according to an embodiment
of the invention;
[41] Figure 8 is a schematic block diagram showing a base station according to an embodiment of
the invention;
[42] Figure 9 is a schematic block diagram showing a wireless communication system according to
15 an embodiment of the invention; and
[43] Figure 10 is a schematic block diagram showing the structure of a computer realizing
embodiments of the invention.
Detailed Description
20 [44] Some embodiments of the present disclosure will be described in conjunction with the
accompanying drawings hereinafter. It should be noted that the elements and/or features shown in a
drawing or disclosed in an embodiments may be combined with the elements and/or features shown
in one or more other drawing or embodiments. It should be further noted that some details regarding
some components and/or processes irrelevant to the disclosure or well known in the art are omitted
25 for the sake of clarity and conciseness.
[45] Figures 1, 2, and 3 illustrate application scenarios of the present application. The 3 application
scenarios as shown are preferred deployment scenarios for carrier aggregation and represent 3
typical application examples of carrier aggregation. In Figure 1 the coverage scopes of the cells
corresponding to carriers Fl and F2 are substantially coincident, i.e. Fl and F2 provide coverage
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areas similar to each other. Fl and F2 may be arranged in the same carrier band, which is a typical
consecutive CA scenario. Figures 2 and 3 each show an example of non-consecutive CA, in which
Fl and F2 may be located in different carrier band. The cell corresponding to Fl is used to ensure
the coverage and the cell corresponding to F2 is used to improve the throughput. The difference
5 between Figure 2 and Figure 3 lies in that, in Figure 3 the antenna of the cell corresponding to F2 is
directed to the edge area of the cell corresponding to Fl, therefore the application scenario of Figure
3 can significantly improve the throughput of the edge area of the cell corresponding to Fl.
[46] Figure 4 is a schematic flow chart showing a discontinuous reception method in a wireless
communication system according to an embodiment of the invention. The wireless communication
10 system is a CA supporting system. CA can be classified as consecutive CA and non-consecutive CA
based on the positions of the aggregated carriers on the spectrum. In consecutive CA, the
aggregated CCs are consecutive on the spectrum. In non-consecutive CA, the aggregated CCs are
not consecutive on the spectrum.
[47] In step 402, it is determined whether to use the consecutive CA or the non-consecutive CA. In
15 the case of consecutive CA, the processing proceeds to step 404. In the case of non-consecutive CA,
the processing proceeds to step 406. In step 404, for the primary cell and each secondary cell, the
common on duration timer and/or DRX inactivity timer are set. In step 406, for the primary cell and
each secondary cell, separated on Duration Timers and/or separated DRX inactivity timers are set.
[48] In an example, in step 402, whether the mobile station uses consecutive CA or non-consecutive
20 CA may be determined based on signaling from the base station. In steps 404 and 406, the timers
can be set based on signaling from the base station.
[49] For consecutive CA, since the aggregated carriers are in the same band, their coverage scopes
are substantially the same. Thus, the common on duration timer and/or DRX inactivity timer may
be set for the primary cell and each secondary cell. For non-consecutive CA, since the aggregated
25 carriers are in different bands, their propagation characteristics are different from each other. Thus,
separated on duration timer and/or separated DRX inactivity timer may be set for the primary cell
and each secondary cell.
[50] The DRX on Pcell and DRX on Scell are explained separately below.
r511 I. DRXonPcell
30 [52] In the following description, those same with the related art (e.g. LTE Rel-8 standard) are
omitted, and only the differences over the related art are described. The DRX operations and the
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DRX parameter configurations are described below respectively.
[53] l.DRX Operations
[54] In an example, under CA scenario, since there exists cross-scheduling (i.e. the PDCCH of a
cell may be used to indicate the data transmission PDCCH of the other cells), if an indication is
5 received over the PDCCH of Pcell indicating new data transmission over other Scells, the timer on
the Pcell needs to be started or reset. For example, if the Pcell receives a downlink transmission
allocation indicator or uplink transmission authorization containing a Carrier indicator field (CIF),
the DRX inactivity timer on Pcell is started or reset, and optionally the Scell corresponding to the
CIF may be notified to start or reset its DRX inactivity timer. If PDCCH of the Pcell receives a
10 downlink transmission allocation indicator or uplink transmission authorization excluding a Carrier
indicator field (CIF), only the timer on the Pcell is started or reset.
[55] In an example, when processing the contention resolution timer, if the message indicating
successful contention resolution is received on only the Pcell, separated contention resolution timers
may be set for the PCell and each Scell. Otherwise, a common contention resolution timer may be
15 set for the PCell and each Scell. In an example, if in the wireless communication system the
message indicating successful contention resolution is received on only the Pcell, the contention
resolution timer of the Pcell is stopped upon receipt of the message indicating successful contention
resolution. At this time, the contention resolution timer of the Scell is not affected. As long as the
timer on the Pcell does not expire, the PDCCH on the Pcell is monitored. In an example, if wireless
20 communication system does not require the contention resolution message (For example, the
contention resolution message for a contention-based random access process (Msg4) to be
transmitted over only the Pcell, the contention resolution timer of the Scell is also started when the
contention resolution timer of the Pcell is started; When the message indicating successful
contention resolution is received on the Pcell or any Scell, the contention resolution timers of the
25 Pcell and Scell are stopped. For example, when the Pcell starts its contention resolution timer (Pcell
starts first), a message is sent to the Scells indicating to start the corresponding contention
resolution timers. Upon receiving the message, each Scell starts its contention resolution timer.
When the message indicating successful contention resolution is received on the Pcell or any Scell,
the contention resolution timer of the cell is stopped, and the cell transmits a message to other cells
30 indicating to stop the corresponding contention resolution timers.
[56] In CA scenario, when processing the DRX retransmission timer, it is considered that each CC
corresponds to a separate HARQ entity, and the retransmission on the Pcell does not cause the Scell
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to listen to the PDCCH. Thus, the operations on the DRX retransmission timer of the Pcell do not
affect the operations of the DRX retransmission timer on the Scell. The operations of the DRX
retransmission timers between the Scells are separate from each other. The start or expiring of the
DRX retransmission timer of a Scell does not affect the operations of the DRX retransmission timer
5 of another Scell. Separate DRX retransmission timers may be set for each of the Pcell and Scells.
[57] With respect to the processing of the DRX short cycle timer, since the Pcell is very important
in CA and the data transmission thereupon may be frequent, inappropriate configuration of the DRX
short cycle timer may cause the mobile station to inappropriately go into long cycle DRX, which
may bring about data loss or affect the quality of service. In view of this, in an example, for the
10 DRX on the Pcell, the mobile station does not go into the long cycle DRX even if the DRX short
cycle timer expires.
[58] 2. DRX Parameter Configurations
[59] DRX parameter configurations are described. The parts that are the same with LTE Rel-8 in the
related art are omitted.
15 [60] In an example, in the case of consecutive CA, the DRX parameters of the primary cell and
each secondary cell may be set as the same values. It is to be noted that the expression "set as the
same values" means that the same parameters, which the primary cell and each secondary cell each
have, are set as the same values. In some cases, for example, the primary cell may have not a
parameter, e.g. Long DRX cycle, while the secondary cell may have this parameter. The
20 interpretation may also be applied to the following description. In the case of non-consecutive CA,
the DRX parameters of the primary cell and each secondary cell may be set as different values.
[61] DRX inactivity timer: in an example, the parameter may be adjusted dynamically according to
one or more conditions of the data amount to be transmitted by the mobile station, the position of
the mobile station, the moving velocity, the signal quality and the coverage scope of the Pcell and
25 the like. The parameter may be set as relatively small in at least one of the following cases: the data
amount to be transmitted by the mobile station is small, the mobile station is relatively near to the
base station, the signal quality is relatively good, and the moving velocity is relatively small with
respect to the coverage. Otherwise, the parameter may be set as relatively large.
[62] DRX short cycle timer: in an example, the value may be set regardless of the DRX
30 performance of the Pcell since the Pcell does not contain long cycle DRX.
[63] Long DRX cycle: in an example, the value may be not set since the Pcell does not contain long
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cycle DRX.
[64] On Duration Timer: in an example, the parameter may be adjusted dynamically according to
one or more conditions of the data amount to be transmitted by the mobile station, the position of
the mobile station, the moving velocity, the signal quality and the coverage scope of the Pcell and
5 the like. The parameter may be set as relatively small in at least one of the following cases: the data
amount to be transmitted by the mobile station is small, the mobile station is relatively near to the
base station, the signal quality is relatively good, and the moving velocity is relatively small with
respect to the coverage. Otherwise, the parameter may be set as relatively large.
[65] DRX cycle: in an example, the parameter may be adjusted dynamically according to one or
10 more conditions of the data amount to be transmitted by the mobile station, the position of the
mobile station, the moving velocity, the signal quality and the coverage scope of the Pcell and the
like. The parameter may be set as relatively small in at least one of the following cases: the data
amount to be transmitted by the mobile station is small, the mobile station is relatively near to the
base station, the signal quality is relatively good, and the moving velocity is relatively small with
15 respect to the coverage. Otherwise, the parameter may be set as relatively large.
[66] CQI/PMI/RI (Channel Quality Indicator / Pre-coding Matrix Index / Rate Indicator) reports: in
existed LTE Rel-8, the time periods for transmitting these feedback reports may be configured, for
example they may be transmitted during the active time or the on duration time. The performance of
the Pcell significantly affects the overall performance of CA, thus obtaining the feedback reports in
20 time is very important. In an example of the embodiment, in the Pcell, these feedback reports are
periodically sent as long as the mobile station is in the active time.
[67] II. DRX on Scell
[68] In the following description, those same with the related art (e.g. LTE Rel-8 standard) are
omitted, and only the differences over the related art are described. The DRX operations and the
25 DRX parameter configurations are described below respectively. The DRX operations on each Scell
may be performed independently, and the DRX parameters of the Scells may be the same or be
different from each other as required in the different scenarios.
[69] 1. DRX Operations
[70] In an example, in CA scenario, in the case of cross-scheduling, if a Scell does not configure
30 PDCCH, there is not DRX on this Scell, that is, DRX configuration is not performed on this Scell.
[71] In an example, after the Scell receives a downlink transmission allocation indication or uplink
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transmission authorization containing a carrier indicator field (CIF), the DRX inactivity timer of the
Scell is started or reset, and optionally the Scell may notify the other cell corresponding to the CIF
to start or reset its DRX inactivity timer. If the Scell receives a downlink transmission allocation
indication or uplink transmission authorization not containing a carrier indicator field (CIF), only
5 the DRX inactivity timer of this Scell is started or reset.
[72] In an example, in CA scenario, if a Scell receives a start contention resolution timer message
from the Pcell, this timer is start, and the PDCCH over the Scell is monitored. When receiving a
stop contention resolution timer message from the Pcell or the other Scell, the Scell stops its
contention resolution timer. If the Scell receives a message indicating successful contention
10 resolution, it stops its contention resolution timer, and notifies the Pcell and the other Scells to stop
their corresponding contention resolution timers.
[73] In an example, the processing of the DRX retransmission timers between Scells may be
independent with each other.
[74] 2. DRX Parameter Configurations
15 [75] DRX parameter configurations are described below. The parts that are the same with the
existed LTE Rel-8 are omitted. DRX parameters may include the expiring times of the timers, such
as DRX inactivity timer, DRX short cycle timer, and on duration timer, in the DRX; the time length
of the DRX cycle and the cycle of transmitting the feedback reports. In the following, the expiring
time of a timer is also simplified as this timer.
20 [76] In an example, the parameters of the Pcell and each Scell can be the same or different from
each other as required by the different scenarios. The policies of parameter configurations under
different scenarios are described below.
[77] If the mobile station is under the consecutive CA scenario, as shown in Figure 1, since the
position of the mobile station is determined and the coverage scopes of the carriers are the same, the
25 relative signal quality of the Pcell and Scells are the same, regardless of their absolute signal quality.
Thus the DRX parameter configurations of the Pcell and the Scells may be the same. That is, it is
unnecessary to set different values for the DRX parameters of the Pcell and the Scells.
[78] In the case that the mobile station is in non-consecutive CA scenario. As shown in Figures 2
and 3, since the coverage scopes of the carriers are different from each other, the mobile station is
30 within the coverage of the good quality signal of the Pcell, but can not be ensured to be within the
coverage of the good quality signal of the Scells. Therefore, the DRX parameter configurations
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between Scells and Pcell and between Scells are preferred to be separate from each other. DRX
parameters can be configured separately according to the network deployment and the position of
the mobile station.
[79] DRX inactivity timer: the parameter may be adjusted dynamically according to one or more
5 conditions of the data amount to be transmitted by the mobile station, the position of the mobile
station, the moving velocity, the signal quality and the coverage scope of the Scell and the like. The
parameter may be set as relatively small in at least one of the following cases: the data amount to be
transmitted by the mobile station is small, the mobile station is relatively near to the base station,
the signal quality is relatively good, and the moving velocity is relatively small with respect to the
10 coverage. Otherwise, the parameter may be set as relatively large.
[80] DRX short cycle timer: the parameter may be adjusted dynamically according to one or more
conditions of the data amount to be transmitted by the mobile station, the position of the mobile
station, the moving velocity, the signal quality and the coverage scope of the Scell and the like. The
parameter may be set as relatively small in at least one of the following cases: the data amount to be
15 transmitted by the mobile station is small, the mobile station is relatively near to the base station,
the signal quality is relatively good, and the moving velocity is relatively small with respect to the
coverage. Otherwise, the parameter may be set as relatively large.
[81] On Duration Timer: the parameter may be adjusted, dynamically according to one or more
conditions of the data amount to be transmitted by the mobile station, the position of the mobile
20 station, the moving velocity, the signal quality and the coverage scope of the Pcell and the like. The
parameter may be set as relatively small in at least one of the following cases: the data amount to be
transmitted by the mobile station is small, the mobile station is relatively near to the base station,
the signal quality is relatively good, and the moving velocity is relatively small with respect to the
coverage. Otherwise, the parameter may be set as relatively large.
25 [82] DRX Cycle: the parameter may be adjusted dynamically according to one or more conditions
of the data amount to be transmitted by the mobile station, the position of the mobile station, the
moving velocity, the signal quality and the coverage scope of the Pcell and the like. The parameter
may be set as relatively small in at least one of the following cases: the data amount to be
transmitted by the mobile station is small, the mobile station is relatively near to the base station,
30 the signal quality is relatively good, and the moving velocity is relatively small with respect to the
coverage. Otherwise, the parameter may be set as relatively large.
[83] CQI/PMI/RI reports: in existed LTE Rel-8, the time periods for transmitting these feedback
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reports may be configured, for example they may be transmitted during the active time or the on
duration time. These reports are very important for canceling the Scell that cannot meet the
transmission quality requirements and thus may be dynamically adjusted based on the signal
qualities of the Scells. In an example, if the signal qualities of the Scells are low, these feedback
5 reports are periodically sent in the active time; otherwise, these reports are periodically sent only in
the on-duration time
[84] Figure 5 is a schematic flow chart showing a discontinuous reception method in a wireless
communication system according to another embodiment. The wireless communication system is a
CA supporting system. In the wireless communication system, the activating / deactivating
10 operations are separate with the carrier configuration processes.
[85] Figure 5 involves step 502. In step 502, for the primary cell and each secondary cell, a
common on Duration timer and/or a common DRX inactivity timer are set.
[86] When a carrier is not in use at a certain time, it can be activated optionally, rather than being
set into the non-configured state. In this way, when the carrier needs to be reused, it can be simply
15 reactivated without the need of reconfiguring it. This can not only save the signaling overhead due
to the frequent reconfiguration, but also flexibly select the carrier to be activated, thereby further
reducing the power consumption of the mobile station. In combination with the activating /
deactivating commands, the DRX complexity under CA can be reduced. In the wireless
communication system utilizing carrier activating / deactivating operations that are separate fi-om
20 the carrier configuration process, a common on Duration timer and/or a common DRX inactivity
timer may be set for the primary cell and each secondary cell.
[87] In an example, if the message indicating the successful contention resolution is received on
only the Pcell, separate contention resolution timers may be set for the primary cell and each
secondary cell, otherwise, a common contention resolution timer may be set for the primary cell and
25 each secondary cell.
[88] In an example, separate DRX retransmission timers may be set for the primary cell and each
secondary cell.
[89] In an example, DRX parameters of the primary cell and each secondary cell configurations.
[90] In an example, if it is determined that a cell or some cells are not needed based on the data
30 amount to be transmitted, the position of the mobile station, the moving velocity, the signal quality
and the carrier coverage and the like, the cell or cells are deactivated and the DRX processes on the
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cell or cells are accordingly terminated, and at this time, the PDCCH corresponding to the cell or
cells need not be monitored. If a cell or cells need to be reactivated as required, it is judged, based
on the DRX running rules, whether the PDCCH corresponding to the cell or cells need to be
monitored, and when it is judged that the PDCCH corresponding to the cell or cells need to be
5 monitored, the PDCCH corresponding to the cell or cells is monitored.
[91] It is to be noted that the embodiment shown in Figure 4 may also be applied to the wireless
communication system utilizing DRX with activating / deactivating processes.
[92] Figure 6 is a schematic block diagram showing a mobile station 600 according to an
embodiment of the invention. The mobile station 600 includes a determining unit 602 configured to
10 determine whether to employ consecutive CA or non-consecutive CA; and a setting unit 604
configured to: in case of the consecutive carrier aggregation, set a common on-duration timer and/or
a common discontinuous reception inactivity timer for a primary cell and each of secondary cells;
and in case of the non-consecutive carrier aggregation, set separate on-duration timers and/or
separate discontinuous reception inactivity timers for the primary cell and each of the secondary
15 cells.
[93] In an example, the mobile station 600 further includes a receiving unit (not shown). When the
receiving unit receives, over the PDCCH of Pcell, an indication indicating new data transmission
over other Scells, the setting unit 604 starts or resets the DRX inactivity timer of the Pcell.
[94] In an example, if the receiving unit receives, over the Pcell or Scell, a downlink transmission
20 allocation indicator or uplink transmission authorization containing a Carrier indicator field (CIF),
the setting unit 604 starts or resets the DRX inactivity timer of the Pcell or Scell, and starts or resets
the DRX inactivity timer of the Scell corresponding to the CIF. When the receiving unit receives,
over the Pcell or Scell, a downlink transmission allocation indicator or uplink transmission
authorization excluding a Carrier indicator field (CIF), the setting unit 604 starts or resets only the
25 DRX inactivity timer of the Pcell or Scell.
[95] In an example, the mobile station 600 further includes a receiving unit (not shovm). If the
receiving unit receives the message indicating the successful contention resolution only over the
Pcell, the setting unit 604 sets separate contention resolution timers for the Pcell and each Scell.
Otherwise, the setting unit 604 sets a common contention resolution timer for the Pcell and each
30 Scell.
[96] In an example, the mobile station 600 further includes a receiving unit (not shown). If the
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message indicative of the successful contention resolution is received only over the Pcell by the
receiving unit, the setting unit 604 stops the contention resolution timer of the Pcell when the
message indicative of the successful contention resolution is received by the receiving unit. If the
message indicative of the successful contention resolution is not only received over the Pcell by the
5 receiving unit, when starting the contention resolution timer of the Pcell, the setting unit 604 further
starts the contention resolution timer of the Scell. The setting unit 604 stops the contention
resolution timers of the Pcell and the Scell when the message indicative of the successful contention
resolution is received by the receiving unit over the primary cell or over any of the secondary cells.
Optionally, the setting unit 604 sends a message of starting the contention resolution timer from the
10 Pcell to the Scell, and when the Scell receives the message of starting the contention resolution
timer from the Pcell, the setting unit 604 starts the contention resolution timer of the Scell. When
the receiving unit receives the message indicating the successful contention resolution over the
Pcell or any of the Scells, the setting unit 604 stops the contention resolution timer of the cell, and
sends a message of stopping the contention resolution timers to the other cells. The other cells stop
15 their contention resolution timers upon receipt of the message.
[97] In an example, the setting unit 604 sets separate discontinuous reception retransmission timers
for the Pcell and each Scell.
[98] In an example, the setting unit 604, in case of the consecutive carrier aggregation, sets the
same value for DRX parameters of the Pcell and each of Scells; and in case of the non-consecutive
20 carrier aggregation, sets different values for DRX parameters of the Pcell and each of the Scells.
[99] In an example, the setting unit 604 still causes the mobile station to go into the short cycle
DRX state in the case the DRX short cycle timer of the Pcell expires.
[100] In an example, in case of at least one of the following: the data to be transmitted being of
smaller amount, being closer to the base station, having better signal quality, and the moving speed
25 of the mobile station being smaller with respect to the converge area of the cell, the setting unit 604
sets a smaller expiring time value of DRX inactivity timer for the cell and/or a smaller expiring time
value of on-duration timer for the cell, and/or sets a bigger DRX cycle for the cell.
[101] In an example, the setting unit 604 sets the expiring time value of the DRX short cycle timer
for the Pcell, regardless of the discontinuous reception performance of the Pcell.
30 [102] In an example, the setting unit 604 does not set the DRX long cycle timer for the Pcell.
[103] In an example, the mobile station further includes a feedback report transmitting unit (not
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shown) configured to send periodically feedback reports for the Pcell during the active time.
[104] In an example, the mobile station further includes a feedback report transmitting unit (not
shown), wherein in case that the Scell has poor signal quality, the feedback report transmitting unit
sends periodically a feedback report for the Scell during active time, otherwise the feedback report
5 transmitting unit sends the feedback report for the Scell only during the on-duration time.
[105] In an example, the'setting unit 604 does not perform DRX configuration for the Scell which
has no configured PDCCH.
[106] In an example, in case of at least one of following: the data to be transmitted being of smaller
amount, being closer to the base station, having better signal quality, and the moving speed of the
10 mobile station is smaller with respect to the converge area of the cell, the setting unit 604 sets a
smaller DRX short cycle timer for the Scell.
[107] For the functions and operations of the components of the mobile station 600, reference may
be made to the embodiment shown in Figure 4, the description of which is not repeated.
[108] Figure 7 is a schematic block diagram showing a mobile station TOO according to an
15 embodiment of the invention. The mobile station 700 includes an activating/deactivating unit 702
configured to perform carrier activating / deactivating operation separate from the carrier
configuration process; and a setting unit 704 configured to set a common on-duration timer and/or
DRX inactivity timer for a Pcell and each of the Scells.
[109] In an example, the mobile station 700 further includes a receiving unit (not shown). If the
20 receiving unit receives the message indicating the successful contention resolution only over the
Pcell, the setting unit 704 sets separate contention resolution timers for the Pcell and each Scell.
Otherwise, the setting unit 704 sets a common contention resolution timer for the Pcell and each
Scell.
[110] In an example, the setting unit 704 sets separate DRX retransmission timers for the Pcell and
25 each Scell.
[111] In an example, the setting unit 704 sets the same DRX parameter values for the Pcell and each
Scell.
[112] In an example, the mobile station 700 further includes a receiving unit (not shown). After the
activating/deactivating unit 702 deactivates a cell, the receiving unit does not monitor the PDCCH
30 corresponding to the cell and after the activating/deactivating unit 702 reactivates a cell that has
been deactivated, the setting unit 704 judges whether to monitor the PDCCH corresponding to the
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cell based on the DRX running rules. When the setting unit 704 judges that the PDCCH
corresponding to the cell needs to be monitored, the receiving unit monitors the PDCCH
corresponding to the cell.
[113] In the above description, some embodiments of the invention are described from the view point
5 of the mobile station. Those skilled in the art can appreciate, the steps in the method shown in the
embodiments described with referenced to Figures 4-7 may be performed by the mobile station
under the control of the base station.
[114] For the functions and operations of the components of the mobile station 700, reference may
be made to the embodiment shown in Figure 5, the description of which is not repeated.
10 [115] Figure 8 is a schematic block diagram showing a base station 800 according to an embodiment
of the invention. The base station 800 includes a transmitting unit 802 configured to send a
command to the mobile station, to control the mobile station to perform the method described with
reference to Figure 4 or 5.
[116] Figure 9 is a schematic block diagram showing a wireless communication system 900
15 according to an embodiment of the invention. The wireless communication system 900 includes the
mobile station 902 described with reference to Figure 6 or 7 and the base station 904 described with
reference to Figure 8.
[117] Those skilled in the art can understand that the above embodiments and examples are
illustrative. The present disclosure should not be regarded as being limited to any particular
20 embodiments or examples stated above.
[118] In the disclosure, the expressions, such as "the first", "the second", and "the Nth" are used.
Those skilled in the art will appreciate that such expressions are used merely to differentiate the
terms in literal so as to describe the invention clearly, and should not be considered as defining the
sequence or the like of the terms.
25 [119] As an example, the component modules, units or steps in the above apparatuses and methods
can be configured with software, hardware, firmware or any combination thereof in the base station
(e.g. eNodeB) or mobile station node (e.g. the UE) of the communication system, as part of the
physical layer apparatus of the base station or the mobile station. The components, units or steps in
the above apparatuses and methods can be configured with software, hardware, firmware or any
30 combination thereof by using any appropriate means or manners known in the art, the description of
which is not detailed herein.
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[120] As can be understood, a system including the above apparatuses according to any of the above
embodiments should also be encompassed in the protection scope of the invention.
[121] As an example, in the case of using software or firmware, programs constituting the software
for realizing the above method or apparatus can be installed to a computer with a specialized
5 hardware structure (e.g. the general purposed computer 1000 as shown in Figure 10) from a storage
medium or a network. The computer, when installed with various programs, is capable of carrying
out various functions.
[122] In Figure 10, a central processing unit (CPU) 1001 executes various types of processing in
accordance with programs stored in a read-only memory (ROM) 1002, or programs loaded from a
10 storage unit 1008 into a random access memory (RAM) 1003. The RAM 1003 also stores the data
required for the CPU 1001 to execute various types of processing, as required. The CPU 1001, the
ROM 1002, and the RAM 1003 are connected to one another through a bus 1004. The bus 1004 is
also connected to an input/output interface 1005.
[123] The input/output interface 1005 is connected to an input unit 1006 composed of a keyboard, a
15 mouse, etc., an output unit 1007 composed of a cathode ray tube or a liquid crystal display, a
speaker, etc., the storage unit 1008, which includes a hard disk, and a communication unit 1009
composed of a modem, a terminal adapter, etc. The communication unit 1009 performs
communicating processing. A drive 1010 is connected to the input/output interface 1005, if needed.
In the drive 1010, for example, removable media 1011 is loaded as a recording medium containing
20 a program of the present invention. The program is read from the removable media 1011 and is
installed into the storage unit 1008, as required.
[124] In the case of using software to realize the above consecutive processing, the programs
constituting the software may be installed from a network such as Internet or a storage medium
such as the removable media 1011.
25 [125] Those skilled in the art should understand the storage medium is not limited to the removable
media 1011, such as, a magnetic disk (including flexible disc), an optical disc (including
compact-disc ROM (CD-ROM) and digital versatile disk (DVD)), an magneto-optical disc
(including an MD (Mini-Disc) (registered trademark)), or a semiconductor memory, in which the
program is recorded and which are distributed to deliver the program to the user aside from a main
30 body of a device, or the ROM 1002 or the hard disc involved in the storage unit 1008, where the
program is recorded and which are previously mounted on the main body of the device and
delivered to the user.
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[126] The present disclosure further provides a program product having machine-readable instruction
codes which, when being executed, may carry out the methods according to the embodiments.
[127] Accordingly, the storage medium for bearing the program product having the
machine-readable instruction codes is also included in the disclosure. The storage medium includes
5 but not limited to a flexible disk, an optical disc, a magneto-optical disc, a storage card, or a
memory stick, or the like.
[128] In the above description of the embodiments, features described or shown with respect to one
embodiment may be used in one or more other embodiments in a similar or same manner, or may be
combined with the features of the other embodiments, or may be used to replace the features of the
10 other embodiments.
[129] As used herein, the terms the terms "comprise," "include," "have" and any variations thereof,
are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus
that comprises a list of elements is not necessarily limited to those elements, but may include other
elements not expressly listed or inherent to such process, method, article, or apparatus.
15 [130] Further, in the disclosure the methods are not limited to a process performed in temporal
sequence according to the order described therein, instead, they can be executed in other temporal
sequence, or be executed in parallel or separatively. That is, the executing orders described above
should not be regarded as limiting the method thereto.
[131] While some embodiments and examples have been disclosed above, it should be noted that
20 these embodiments and examples are only used to illustrate the present disclosure but not to limit
the present disclosure. Various modifications, improvements and equivalents can be made by those
skilled in the art without departing from the scope of the present disclosure. Such modifications,
improvements and equivalents should also be regarded as being covered by the protection scope of
the present disclosure.
25
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Claims
1. A discontinuous reception method in a wireless communication system, comprising:
determining to employ a consecutive carrier aggregation or a non-consecutive carrier
5 aggregation;
in case of the consecutive carrier aggregation, for a primary ceil and eacli of the secondary
cells, setting a common on-duration timer and/or a common discontinuous reception inactivity timer;
and
in case of the non-consecutive carrier aggregation, for a primary cell and each of the secondary
10 cells, setting separate on-duration timers and/or separate discontinuous reception inactivity timers.
2. The method according to claim 1, further comprising:
if an instruction instructing a new data transmission over a primary cell or other secondary
cells is received in a physical downlink control channel for the primary cell, starting or resetting the
15 discontinuous reception inactivity timer for the primary cell.
3. The method according to claim 2, wherein:
if an uplink transmission authorization or a downlink transmission assignment instruction
including a carrier indicator field is received over a primary cell or a secondary cell, starting or
20 resetting the discontinuous reception inactivity timer of the primary cell or the secondary cell, and
starting or resetting the discontinuous reception inactivity timer of the cell corresponding to the
carrier indicator field; and
if an uplink transmission authorization or a downlink transmission assignment instruction not
including the carrier indicator field is received over a primary cell or a secondary cell, only starting
25 or resetting the discontinuous reception inactivity timer for the primary cell or the secondary cell.
4. The method according to claim 1, further comprising:
if a message indicative of successful contention resolution is to be received only over the
20
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primary cell, setting separate contention resolution timers for the primary cell and each of the
secondary cells, otherwise setting a common contention resolution timer for the primary cell and
each of the secondary cells.
5 5. The method according to claim 1, further comprising:
if a message indicative of successful contention resolution is to be received only over a
primary cell, stopping the contention resolution timer of the primary cell when the message
indicative of the successful contention resolution is received;
if a message indicative of successful contention resolution is not only to be received over a
10 primary cell, further starting contention resolution timers of the secondary cells when the contention
resolution timer of the primary cell is started; stopping the contention resolution timers of the
primary cell and the secondary cells when the message indicative of the successful contention
resolution is received over the primary cell or over any of the secondary cells.
15 6. The method according to claim 1, further comprising:
setting separate discontinuous reception retransmission timers for the primary cell and each of
secondary cells respectively.
7. The method according to claim 1, further comprising:
20 in case of the consecutive carrier aggregation, setting the same value for discontinuous
reception parameters of the primary cell and each of the secondary cells; and
in case of the non-consecutive carrier aggregation, setting different values for the
discontinuous reception parameters of the primary cell and each of the secondary cells.
25 8. The method according to claim 1, further comprising:
when a discontinuous reception short cycle timer for the primary cell expires, still entering a
short cycle discontinuous reception state.
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9. The method according to claim 1, further comprising:
in case of at least one of: the data to be transmitted being of smaller amount, being closer to
the base station, having better signal quality, and the moving speed of the mobile station being
smaller with respect to the converge area of a cell, setting a smaller expiring time value of the
5 discontinuous reception inactivity timer for a cell to be configured and/or a smaller expiring time
value of the on-duration timer for the cell to be configured, and/or setting a bigger discontinuous
reception cycle for the cell to be configured.
10. The method according to claim 1, further comprising:
10 setting an expiring time value of a discontinuous reception short cycle timer for the primary
cell irrelative to the discontinuous reception performance of the primary cell.
11. The method according to claim 1, further comprising: not setting a discontinuous reception
long cycle timer for the primary cell.
15
12. The method according to claim 1, further comprising: sending periodically a feedback
report for the primary cell during the active time.
13. The method according to claim 1, further comprising:
20 if the secondary cell has poor signal quality, sending periodically a feedback report for the
secondary cell during the active time, otherwise sending the feedback report for the secondary cell
only during the on-duration time.
14. The method according to claim 5, wherein:
25 starting the contention resolution timer of the secondary cell comprises sending a message for
starting the contention resolution timer from the primary cell to the secondary cell, and starting the
contention resolution timer of the secondary cell when the secondary cell receives the message for
starting the contention resolution timer transmitted from the primary cell;
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when the message indicative of the successful contention resolution is received over the
primary cell or over any of the secondary cells, stopping the contention resolution timers of the
primary cell and the secondary cells comprises, when the message indicative of the successful
contention resolution is received over the primary cell or over any of the secondary cells, stopping
5 the contention resolution timer of the cell, and sending to other cells a message for stopping the
contention resolution timer of respective cell, when the message is received by the other cells,
stopping the contention resolution timer of the respective cell.
15. The method according to claim 1, further comprising not providing discontinuous reception
10 for the secondary cell which is not provided with the physical downlink control channel.
16. The method according to claim 1, further comprising:
in case of at least one of: the data to be transmitted being of smaller amount, being closer to
the base station, having better signal quality, and the moving speed of the mobile station being
15 smaller with respect to the converge area of a secondary cell to be configured, setting a smaller
discontinuous reception short cycle timer for the secondary cell to be configured.
17. A discontinuous reception method in a wireless communication system, carrier
activating/deactivating operation separate from the carrier configuration process being used in the
20 wireless communication system, the method comprising:
for a primary cell and each of secondary cells, setting a common on-duration timer and/or
discontinuous reception inactivity timer.
18. The method according to claim 17, further comprising:
25 if a message indicative of successful contention resolution is received only over the primary
cell, setting separate contention resolution timers for the primary cell and each of the secondary
cells, otherwise setting a common contention resolution timer for the primary cell and each of the
secondary cells.
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19. The method according to claim 17, further comprising:
setting separate discontinuous reception retransmission timers for the primary cell and each of
the secondary cells.
5
20. The method according to claim 17, further comprising:
setting the same value for the discontinuous reception parameters for the primary cell and each
of the secondary cells.
10 21. The method according to claim 17, further comprising:
after performing the deactivating operation to a cell, no longer monitoring the physical
downlink control channel corresponding to the cell; and
after performing reactivating operation on the cell on which the deactivating operation has
been performed, judging whether the physical downlink control channel corresponding to the cell is
15 needed to be monitored according to discontinuous reception running rule, and monitoring the
downlink control channel corresponding to the cell when it is judged that the downlink control
channel corresponding to the cell is needed to be monitored.
22. A mobile station, comprising:
20 a determining unit configured to determine to employ a consecutive carrier aggregation or a
non-consecutive carrier aggregation; and
a setting unit configured to, in case of the consecutive carrier aggregation, set a common
on-duration timer and/or a common discontinuous reception inactivity timer for a primary cell and
each of secondary cells; and in case of the non-consecutive carrier aggregation, set separate
25 on-duration timers and/or separate discontinuous reception inactivity timers for the primary cell and
each of the secondary cells.
23. The mobile station according to claim 22, further comprising a receiving unit, wherein
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when an instruction instructing a new data transmission over a primary cell or other secondary cells
is received in physical downlink control channel for the primary cell by the receiving unit, the
setting unit starts or resets the discontinuous reception inactivity timer for the primary cell.
5 24. The mobile station according to claim 23, wherein when an uplink transmission
authorization or a downlink transmission assignment instruction including a carrier indicator field is
received over the primary cell or a secondary cell by the receiving unit, the setting unit starts or
resets the discontinuous reception inactivity timer of the primary cell or the secondary cell, and
starts or resets the discontinuous reception inactivity timer of the cell corresponding to the carrier
10 indicator field; and when an uplink transmission authorization or a downlink transmission
assignment instruction not including the carrier indicator field is received over a primary cell or a
secondary cell by the receiving unit, the setting unit only starts or resets the discontinuous reception
inactivity timer for the primary cell or the secondary cell.
15 25. The mobile station according to claim 22, further comprising a receiving unit, wherein if a
message indicative of successful contention resolution is to be received only over the primary cell
by the receiving unit, the setting unit sets separate contention resolution timers for the primary cell
and each of the secondary cells, otherwise the setting unit sets a common contention resolution
timer for the primary cell and each of the secondary cells.
20
26. The mobile station according to claim 22, further comprising a receiving unit, wherein if
the message indicative of the successful contention resolution is to be received only over the
primary cell by the receiving unit, the setting unit stops the contention resolution timer of the
primary cell when the message indicative of the successful contention resolution is received by the
25 receiving unit;
if the message indicative of the successful contention resolution is not only to be received over
the primary cell by the receiving unit, when starting the contention resolution timer of the primary
cell, the setting unit further starts the contention resolution timer of the secondary cell; the setting
25
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unit stops contention resolution timers of the primary cell and the secondary cell when the message
indicative of the successful contention resolution is received by the receiving unit over the primary
cell or over any. of the secondary cells.
5 27. The mobile station according to claim 22, wherein the setting unit sets separate
discontinuous reception retransmission timers for the primary cell and each of the secondary cells.
28. The mobile station according to claim 22, wherein, the setting unit, in case of the
consecutive carrier aggregation, sets the same value for discontinuous reception parameters of the
10 primary cell and each of secondary cells; and in case of the non-consecutive carrier aggregation,
sets different values for discontinuous reception parameters of the primary cell and each of the
secondary cells.
29. The mobile station according to claim 22, the setting unit makes the mobile station still
15 enter a short cycle discontinuous reception state when a discontinuous reception short cycle timer
for the primary cell expires.
30. The mobile station according to claim 22, wherein
the setting unit, in case of at least one of: the data to be transmitted being of smaller amount,
20 being closer to the base station, having better signal quality, and the moving speed of the mobile
station being smaller with respect to the converge area of a cell, sets a smaller expiring time value
of discontinuous reception inactivity timer for a cell to be configured and/or a smaller expiring time
value of on-duration timer for the cell to be configured, and/or sets a bigger discontinuous reception
cycle for the cell to be configured.
25
31. The mobile station according to claim 22, wherein
the setting unit sets an expiring time value of a discontinuous reception short cycle timer for
the primary cell irrelative to the discontinuous reception performance of the primary cell.
26
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32. The mobile station according to claim 22, wherein the setting unit does not set a
discontinuous reception long cycle timer for the primary cell.
5 33. The mobile station according to claim 22, further comprising a feedback report
transmitting unit configured to send periodically feedback report for the primary cell during the
active time.
34. The mobile station according to claim 22, further comprising a feedback report
10 transmitting unit, wherein the feedback report transmitting unit, in case that the secondary cell has
poor signal quality, sends periodically a feedback report for the secondary cell during active time,
otherwise sends the feedback report for the secondary cell only during the on-duration time.
35. The mobile station according to claim 26, wherein
15 the setting unit sends a message for starting the contention resolution timer from the primary
cell to the secondary cell, and the setting unit starts the contention resolution timer of the secondary
cell when the secondary cell receives the message for starting the contention resolution timer
transmitted from the primary cell;
when the receiving unit receives the message indicative of the successful contention resolution
20 over the primary cell or over any of the secondary cells, the setting unit stops the contention
resolution timers of the cell and sends a message to other cells to stop the contention resolution
timer of respective cell, when the other cells receive the message, the setting unit stops the
contention resolution timer of the respective cell.
25 36. The mobile station according to claim 22, the setting unit does not provide discontinuous
reception for the secondary cell which is not provided with the physical downlink control channel.
37. The mobile station according to claim 22, further comprising:
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in case of at least one of: the data to be transmitted being of smaller amount, being closer to
the base station, having better signal quality, and the moving speed of the mobile station is smaller
with respect to the converge area of a secondary cell, the setting unit sets a smaller discontinuous
reception short cycle timer for the secondary cell.
5
38. A mobile station, comprising:
an activating/deactivating unit configured to perform carrier activating/deactivating operation
separate from the carrier configuration process; and
a setting unit configured to set a common on-duration timer and/or discontinuous reception
10 inactivity timer for a primary cell and each of the secondary cells.
39. The mobile station according to claim 38, further comprising: a receiving unit, wherein if
the receiving unit receives a message indicative of successful contention resolution only over the
primary cell, the setting unit uses separate contention resolution timers for the primary cell and each
15 of the secondary cells respectively, otherwise sets a common contention resolution timer for the
primary cell and each of the secondary cell.
40. The mobile station according to claim 38, the setting unit sets separate discontinuous
reception retransmission timers for the primary cell and each of the secondary cells.
20
41. The mobile station according to claim 38, wherein the setting unit sets the same value for
the discontinuous reception parameters for the primary cell and each of the secondary cells.
42. The mobile station according to claim 38, further comprising a receiving unit, wherein
25 after the activating/deactivating unit perform the deactivating operation on a cell, the receiving
unit no longer monitors the physical downlink control channel corresponding to the cell; and after
the activating/deactivating unit perform reactivating operation on the cell on which the deactivating
operation has been performed, the setting unit judges whether the physical downlink control
28
Sony China Ref.: CNPA10039IN00
Sony Ref.: SP312451IN00
Unitalen Ref.: 0P1211-06-0507
Translation of PCX specification
channel corresponding to the cell is needed to be monitored according to discontinuous reception
running rule, and monitors the downlink control channel corresponding to the cell when it is judged
that the downlink control channel coiresponding to the cell is needed to be monitored..
5 43. A base station, comprising a transmitting unit for sending an instruction to the mobile
station to control the mobile station to perform the method according to any of claims 1-21.
44. A wireless communication system, comprising the mobile station according to claim 22
and the base station according to claim 43.