WE CLAIM:
1. A method, in a management device in wireless relay communication network, for
reconstructing the network topology of multiple cells in the domination of said
management device, wherein, the network topology of said multiple cells is reconstructed
according to a traffic related information of said multiple cells, the method comprising
the steps of:
a. obtaining the traffic related information of each cell in said multiple cells
respectively;
b. judging whether the traffic related information of at least one cell in said multiple
cells satisfies a predefined condition;
c. performing load balancing among the multiple cells by reconstructing the network
topology when the traffic related information of at least one cell in said multiple cells
satisfies the predefined condition, wherein:
cl. if the traffic related information of at least one cell in said multiple cells satisfies the predefined condition, determining to hand over at least one relay station or at least one relay station together with at least one mobile station in each of said at least one cell to a neighboring cell;
c3. notifying respectively at least one relay station or at least one relay station together with at least one mobile station in each of said at least one cell to perform handover operation, or notifying a handover controlling device to which each of said at least one cell belongs, to indicate at least one relay station or at least one relay station together with at least one mobile station in the domination of said handover controlling device to perform handover operation, wherein, each notification comprises the handover related information of the neighboring cell to which each relay station or mobile station is going to be handed over.
2. The method according to claim 1, wherein, said traffic related information of each
cell comprises time-frequency resource related amount that is used by the traffic data in
said cell in a predefined time duration, said predefined condition comprises whether said
time-frequency resource related amount exceeds a first predefined threshold.

3. The method according to claim 2, wherein, said step cl comprises steps of:
ell. for each of one or more cell having a time-frequency resource related amount used by the traffic data in said predefined time duration exceeding said first predefined threshold, calculating the sum of time-frequency resource related amount used by the traffic data of its one or more neighboring cells in said predefined time duration, each of said one or more neighboring cell having a time-frequency resource related amount used by the traffic data in said predefined time duration being less than or equal to said first predefined threshold;
cl2. for the cell i having a minimum sum of the time-frequency resource related amount used by the traffic data of its said one or more neighboring cells, determining to hand over at least one edge relay station or at least one edge relay station together with at least one mobile station in said cell i to its said one or more neighboring cells, so as to minimize
wherein, S is the set that comprises cell i and cell i's at least one neighboring cell, time-frequency resource related amount used by whose traffic data in said predefined time duration is less than or equal to said first predefined threshold; NBLj is the time-frequency resource related amount used, in a predefined time duration, by the traffic data of cell j in a set S recalculated under a network topology assuming at least one edge relay station or at least one edge relay station together with at least one mobile station being handed over from cell i to its neighboring cell(s); BLm is the mean value of the time-frequency resource related amount used, in said predefined time duration, by the traffic data of all cells in set S;
repeatedly executing step ell and step cl2, until the time-frequency resource related amount used, in said predefined time duration, by the traffic data of each cell in said multiple cells is lower than or equal to said first predefined threshold.

4. The method according to claim 2, wherein, said time-frequency resource related
amount used, in said predefined time duration, by the traffic data of each cell, comprises
any one or the combination of several items of the followings:
the sum of time-frequency resource amount used by all types of uplink and/or downlink traffic data;
the ratio of the sum of time-frequency resource amount used by all types of uplink and/or downlink traffic data to all the time-frequency resource amount in that cell;
the weighed sum of the time-frequency resource amount used by all types of uplink and/or downlink traffic data;
the ratio of the weighed sum of the time-frequency resource amount used by all types of uplink and/or downlink traffic data to all the time-frequency resource amount in that cell.
5. The method according to claim 4, wherein, the weighed sum of the time-frequency resource amount that is used by all types of uplink and/or downlink traffic data comprises the weighed sum of the time-frequency resource amount that is used by all types of uplink and/or downlink traffic data according to the traffic type.
6. A method in a base station of a wireless relay communication network, for aiding a management device to reconstruct a network topology, wherein, said method comprises the steps of:
A. obtaining traffic related information of the cell(s) in the domination of said base
station;
B. notifying said management device of said traffic related information;
b. judging whether the traffic related information of at least one cell in said multiple
cells satisfies a predefined condition;
c. performing load balancing among the multiple cells by reconstructing the network
topology when the traffic related information of at least one cell in said multiple cells
satisfies the predefined condition, wherein:
cl. if the traffic related information of at least one cell in said multiple cells satisfies the predefined condition, determining to hand over at least one relay station or at least

one relay station together with at least one mobile station in each of said at least one cell to a neighboring cell;
c3. notifying respectively at least one relay station or at least one relay station together with at least one mobile station in each of said at least one cell to perform handover operation, or notifying a handover controlling device to which each of said at least one cell belongs, to indicate at least one relay station or at least one relay station together with at least one mobile station in the domination of said handover controlling device to perform handover operation, wherein, each notification comprises the handover related information of the neighboring cell to which each relay station or mobile station is going to be handed over.
7. A method in a handover controlling device of a wireless relay communication
network, for aiding a management device to reconstruct the network topology, said
method comprises the steps of:
i. receiving a handover notification from said management device to notify said
handover controlling device to indicate at least one stationary relay station or at least one stationary relay station together with at least one mobile station in the domination of said handover controlling device to perform handover operation, said notification comprises the handover related information of the neighboring cell to which each stationary relay station or mobile station is going to be handed over;
ii. according to said handover notification, respectively notifying said at least one stationary relay station or at least one stationary relay station together with at least one mobile station to perform handover operation.
8. A method in a stationary relay station of a wireless relay communication network,
for aiding a management device to reconstruct the network topology, said method
comprises the steps of:
I. receiving a handover notification from a management device or a handover
controlling device to which said stationary relay station belongs, said handover notification comprises the handover related information of the neighboring cell to which said stationary relay station is going to be handed over;

II. according to said handover notification, performing the handover operation.
9. A management apparatus (90) in a management device in wireless relay
communication network, for reconstructing the network topology of multiple cells in the
domination of said management device, wherein, the network topology of said multiple
cells is reconstructed according to a traffic related information of said multiple cells, and
wherein the management device comprises:
a first obtaining means (92), for obtaining the traffic related information of each cell in said multiple cells respectively;
a judging means (91), for judging whether the traffic related information of at least one cell in said multiple cells satisfies a predefined condition;
a reconstructing means (93), for reconstructing the network topology, if the traffic related information of at least one cells in said multiple cells satisfies the predefined condition, wherein:
if the traffic related information of at least one cell in said multiple cells satisfies the predefined condition, the management device is adapted to determine to hand over at least one relay station or at least one relay station together with at least one mobile station in each of said at least one cell to a neighboring cell;
wherein the management device is adapted to notify respectively at least one relay station or at least one relay station together with at least one mobile station in each of said at least one cell to perform handover operation, or to notify a handover controlling device to which each of said at least one cell belongs, to indicate at least one relay station or at least one relay station together with at least one mobile station in the domination of said handover controlling device to perform handover operation, wherein, each notification comprises the handover related information of the neighboring cell to which each relay station or mobile station is going to be handed over.
10. A first aiding apparatus (100) in a base station of a wireless relay communication
network, for aiding a management device to reconstruct a network topology, comprising:
an obtaining means (101), for obtaining traffic related information of the cell(s) in the domination of said base station;

a notifying means (102), for notifying said management device of said traffic related information;
wherein the management device comprises:
a judging means (91), for judging whether the traffic related information of at least one cell in said multiple cells satisfies a predefined condition;
a reconstructing means (93), for reconstructing the network topology, if the traffic related information of at least one cells in said multiple cells satisfies the predefined condition, wherein:
if the traffic related information of at least one cell in said multiple cells satisfies the predefined condition, the management device is adapted to determine to hand over at least one relay station or at least one relay station together with at least one mobile station in each of said at least one cell to a neighboring cell;
wherein the management device is adapted to notify respectively at least one relay station or at least one relay station together with at least one mobile station in each of said at least one cell to perform handover operation, or to notify a handover controlling device to which each of said at least one cell belongs, to indicate at least one relay station or at least one relay station together with at least one mobile station in the domination of said handover controlling device to perform handover operation, wherein, each notification comprises the handover related information of the neighboring cell to which each relay station or mobile station is going to be handed over.
11. A handover controlling apparatus (110), in a handover controlling device of a wireless relay communication network, for aiding a management device to reconstruct the network topology, comprising:
a second receiving means (111), for receiving a handover notification from said management device to notify said handover controlling device to indicate at least one stationary relay station or at least one stationary relay station together with at least one mobile station in the domination of said handover controlling device to perform handover operation, said notification comprises the handover related information of the neighboring cell to which each stationary relay station or mobile station is going to be handed over;

a third notifying means (112), for according to said handover notification, respectively notifying said at least one stationary relay station or said at least one stationary relay station together with at least one mobile station to perform handover operation.
12. A second aiding apparatus (120) in a stationary relay station of a wireless relay communication network, for aiding a management device to reconstruct the network topology, comprising:
a third receiving means (121), for receiving a handover notification from a management device or a handover controlling device to which said stationary relay station belongs, said handover notification comprises the handover related information of the neighboring cell to which said stationary relay station is going to be handed over;
a handover means (122), for performing handover operation according to said handover notification.