Method of partitioning resources in a cognitive radio wireless communication system and system supporting the same
A method of partitioning resources in a CR wireless communication system and a system supporting the same are provided. A new BS receives radio resource status information from a prior BS using a particular frequency band, and requests resource partitioning to the prior BS using a new uplink subchannel defined for communications between BSs. Resource negotiation messages are exchanged over a channel defined between the two BSs so as to efficiently partition resources between the BSs.
1. A method of partitioning resources in a Cognitive Radio (CR) wireless communication system, the method comprising:
determining if at least two new Base Stations (BSs) are newly installed in a service area of a prior Base Station (BS);
allocating a contention-based ranging subchannel of the prior BS to the at least two BSs when the at least two BSs are in the absence of any available frequency band;
performing contention-based ranging between the at least two new BSs through the contention-based ranging subchannel;
allocating uplink resources of the prior BS to a new BS being one of the at least two new BSs as a result of the contention-based ranging;
requesting resource partitioning to the prior BS through the uplink resources by the new BS; and
receiving information about partitioned resources in response to the requesting from the prior BS by the new BS,
wherein the contention-based ranging subchannel is periodically allocated for contention between only the at least two new BSs.
2. The method of claim 1 , wherein, if the prior BS and the new BS support Orthogonal Frequency Division Multiple Access (OFDMA), the radio resource status information includes at least a subchannel identification flag and contention-based ranging subchannel information, wherein the subchannel identification flag indicates a presence or absence of the contention-based ranging subchannel information and a contention-based ranging subchannel information indicates a contention-based ranging subchannel.
3. A method of partitioning resources in a Cognitive Radio (CR) wireless communication system, the method comprising:
determining if at least two new Base Stations (BSs) are newly installed in a service area of a prior Base Station (BS);
allocating, by the prior BS, a contention-based ranging subchannel of the at least two BSs when the at least two BSs are in the absence of any available frequency band;
allocating, by the prior BS, uplink resources to a new BS being one of the at least two new Base Stations (BSs) as a result of contention-based ranging between the at least two new BSs;
receiving, by the prior BS, a resource partitioning request from the new BS, the resource partitioning request being a request requested by the new BS through the uplink resources;
partitioning, by the prior BS, radio resources of the prior BS to the new BS; and
transmitting, by the prior BS, information about the partitioned radio resources to the new BS,
wherein the contention-based ranging subchannel is periodically allocated for contention between only the at least two new BSs.
4. The method of claim 3 , further comprising:
transmitting radio resource status information to the new BS by the prior BS.
5. The method of claim 4 , wherein if the prior BS and the new BS support Orthogonal Frequency Division Multiple Access (OFDMA), the radio resource status information includes at least a subchannel identification flag and contention-based ranging subchannel information, wherein the subchannel identification flag indicates a presence or absence of the contention-based ranging subchannel information and the contention-based ranging subchannel information indicates the contention-based ranging subchannel.
6. A method of partitioning resources in a Cognitive Radio (CR) wireless communication system, the method comprising:
determining if at least two new Base Stations (BSs) are newly installed in a service area of a prior Base Station (BS);
allocating a contention-based ranging subchannel of the prior BS to the at least two BSs when the at least two BSs are in the absence of any available frequency band BS by the prior BS;
performing contention-based ranging between the at least two new BSs through the contention-based ranging subchannel
allocating uplink resources of the prior BS to a new BS being one of the at least two new BSs as a result of the contention-based ranging;
requesting resource partitioning to the prior BS through the uplink resources by the new BS;
partitioning radio resources of the prior BS to the new BS by the prior BS;
transmitting information about the partitioned radio resources to the new BS by the prior BS; and
receiving the information about the partitioned radio resources by the new BS,
wherein the contention-based ranging subchannel is periodically allocated for contention between only the at least two new BSs.
7. The method of claim 6 , further comprising:
transmitting the radio resource status information to the new BS by the prior BS.
8. The method of claim 6 , wherein if the prior BS and the new BS support Orthogonal Frequency Division Multiple Access (OFDMA), the radio resource status information includes at least a subchannel identification flag and contention-based ranging subchannel information, wherein the subchannel identification flag indicates a presence or absence of the contention-based ranging subchannel information and the contention-based ranging subchannel information indicates the contention-based ranging subchannel.
9. A Cognitive Radio (CR) wireless communication system for partitioning resources, comprising:
at least two new Base Stations (BSs) are newly installed in a service area of a prior Base Station (BS);
the new Base Station (BS) for performing contention-based ranging between the at least two BSs though a contention-based ranging subchannel, requesting resource partitioning by using uplink resources allocated through the contention-based ranging, and receiving information about partitioned radio resources in response to requesting resource partitioning; and
a prior BS for allocating a contention-based ranging subchannel to the at least two new BSs when the at least two new BSs are in the absence of any available frequency band, allocating the uplink resources to the new BS being one of the at least two new BSs as a result of the contention-based ranging, partitioning radio resources of the prior BS to the new BS, and transmitting the information about the partitioned radio resources to the new BS,
wherein the contention-based ranging subchannel is periodically allocated for contention between only the at least two new BSs.
10. The CR wireless communication system of claim 9 , wherein the prior BS transmits radio resource status information for the contention-based ranging to the new BS.
11. The CR wireless communication system of claim 10 , wherein if the prior BS and the new BS support Orthogonal Frequency Division Multiple Access (OFDMA), the radio resource status information includes at least a subchannel identification flag and contention-based ranging subchannel information, wherein the subchannel identification flag indicates a presence or absence of the contention-based ranging subchannel information and the contention-based ranging subchannel information indicates the contention-based ranging subchannel.