Method and device for requesting and allocating bandwidths in wireless communication systems
To address the drawbacks of the current bandwidth requesting and allocation in the wireless broadband access network, the present invention proposes a technical solution of fast bandwidth requesting and allocation, wherein the MS sends a bandwidth allocation request message to the BS for only once, and the interactions between the BS and the MS are decreased so as to increase the efficiency of bandwidth requesting and allocation, effectively shorten the transmission waiting time of traffic data, and especially improve the support for latency-sensitive data traffic. Due to the fact that the interactions between the BS and the MS are decreased, various processing resources in the BS and the MS are spared. Additionally, the BS can also adjust the size of the time/frequency resource block on which each mobile station sends the bandwidth allocation request message according to the number of the mobile stations covered by the base station, and/or according to the traffic types in each mobile station, so as to make the whole wireless communication system operate efficiently.
1. A method, in a mobile station in a wireless telecommunication network, for requesting a base station to allocate bandwidths for the mobile station, comprising:
receiving a first resource allocation notification message from the base station, said first resource allocation notification message comprising the time or frequency resource information of a time or frequency resource block on which each mobile station sends a bandwidth allocation request message randomly, said time or frequency resource block being shared by a plurality of mobile stations; and
sending said bandwidth allocation request message to said base station on the time or frequency resource block indicated by said time or frequency resource information, wherein said bandwidth allocation request message comprises bandwidth allocation request-related information.
2. A method as claimed in claim 1 , further comprising, before receiving a first resource allocation notification message from the base station:
receiving from said base station a sub-block indication message for indicating the position of the time or frequency resource sub-block on which said mobile station sends said bandwidth allocation request message,
wherein said time or frequency resource block on which each mobile station sends said bandwidth allocation request message comprises a plurality of time or frequency resource sub-blocks,
wherein the bandwidth allocation request message is sent to said base station on said time or frequency resource sub-block indicated by said sub-block indication message, according to said time or frequency resource information.
3. A method as claimed in claim 1 , comprising, after sending said bandwidth allocation request message to said base station:
receiving a second resource allocation notification message from said base station, said second resource allocation notification message comprising the time or frequency resource information allocated for said mobile station by said base station according to said bandwidth allocation request message, and where the time or frequency resource block indicated by said time or frequency resource information is exclusively used by said mobile station.
4. A method as claimed in claim 1 , comprising, after sending said bandwidth allocation request message to said base station:
judging whether said second resource allocation notification message is received from said base station in a predefined duration;
if said second resource allocation notification message is not received in said predefined duration, receiving a first resource allocation notification message from the base station and sending said bandwidth allocation request message to said base station on the resource block indicated by said time or frequency resource information.
5. A method as claimed in claim 4 , further comprising:
performing the receiving and sending repeatedly after a predefined time interval if said second resource allocation notification message is not received in said predefined duration.
6. A method as claimed in claim 5 , wherein said method further comprises:
determining said predefined time interval according to the truncated binary exponential back-off algorithm.
7. A method as claimed in claim 1 , wherein said bandwidth allocation request-related information comprises the traffic identification in said mobile station and the bandwidth requested by said mobile station.
8. A method as claimed in claim 7 , wherein said wireless telecommunication network comprises WiMAX wireless telecommunication network, and the traffic identification in said mobile station comprises the connection identification of the traffic flow in said mobile station.
9. A method, in a base station in a wireless telecommunication network, for allocating bandwidths for a mobile station, comprising:
sending a first resource allocation notification message to said mobile station, said first resource allocation notification message comprising the time or frequency resource information of a time or frequency resource block on which each mobile station sends a bandwidth allocation request message randomly, said time or frequency resource block being shared by a plurality of mobile stations;
receiving said bandwidth allocation request message from said mobile station on said time or frequency resource block on which each mobile station sends said bandwidth allocation request message randomly, said bandwidth allocation request message comprising bandwidth allocation request-related information;
allocating base station time or frequency resources for said mobile station according to said bandwidth allocation request-related information, and generating a second resource allocation notification message, said allocated time or frequency resources being exclusively used by said mobile station; and
sending said second resource allocation notification message to said mobile station.
10. A method as claimed in claim 9 , further comprising, before sending a first resource allocation notification message to said mobile station:
sending to said mobile station a sub-block indication message for indicating the position of the time or frequency resource sub-block on which said mobile station sends said bandwidth allocation request message;
wherein the bandwidth allocation request message from the mobile station is received on time or frequency resource sub-block on which said mobile station sends said bandwidth allocation request message,
wherein said time or frequency resource block on which each mobile station sends said bandwidth allocation request message comprises a plurality of time or frequency resource sub-blocks.
11. A method as claimed in claim 9 , wherein said method further comprises:
adjusting the size of said time or frequency resource block on which each mobile station sends said bandwidth allocation request message according to the number of the mobile stations covered by the base station, and/or the traffic types and/or the number of the traffics in each mobile station.
12. A method as claimed in claim 9 , wherein said bandwidth allocation request related information comprises the traffic identification in said mobile station and the bandwidth requested by said mobile station.
13. A method as claimed in claim 12 , wherein said wireless telecommunication network comprises WiMAX wireless telecommunication network, and the traffic identification in said mobile station comprises the connection identification of the traffic flow in said mobile station.
14. A requesting apparatus, in a mobile station in a wireless telecommunication network, for requesting a base station to allocate bandwidths for the mobile station, comprising:
a first receiver, for receiving a first resource allocation notification message from the base station, said first resource allocation notification message comprising the time or frequency resource information of a time or frequency resource block on which each mobile station sends a bandwidth allocation request message randomly, said time or frequency resource block being shared by a plurality of mobile stations; and
a first transmitter, for sending said bandwidth allocation request message to said base station on the time or frequency resource block indicated by said time or frequency resource information, wherein said bandwidth allocation request message comprises bandwidth allocation request related information.
15. An allocating apparatus, in a base station in a wireless telecommunication network, for allocating bandwidths for a mobile station, comprising:
a second transmitter, configured to send a first resource allocation notification message to said mobile station, said first resource allocation notification message comprising the time or frequency resource information of a time or frequency resource block on which each mobile station sends a bandwidth allocation request message randomly, and said time or frequency resource block being shared by a plurality of mobile stations;
a second receiver, configured to receive said bandwidth allocation request message from said mobile station on said time or frequency resource block on which each mobile station sends said bandwidth allocation request message randomly, said bandwidth allocation request message comprising bandwidth allocation request-related information; and
an allocating and generating device configured to allocate time or frequency resources for said mobile station according to said bandwidth allocation request related information, and generate a second resource allocation notification message, said allocated time or frequency resources being exclusively used by said mobile station;
wherein said second sending transmitter is further configured to send said second resource allocation notification message to said mobile station.