Cellular communication method based on enhanced hybrid duplexing technology
An enhanced hybrid duplexing technology (EDHT)-based communication method including dividing a cell prescribed by a transmission power of the base station into at least two logical areas, dividing the system frequency band into at least two subbands, and communicating in different duplexing modes using at least one of the subbands according to a position of the terminal within the cell. According to the method, a flexible resource management is possible according to the communication environment by dividing an entire system band into at least two subbands, differentiating the bandwidths of the subbands and the duplexing techniques, and selecting and allocating the resources of the subbands according to the position of the terminal within the cell.
1. A communication method in a cellular communication system including at least one base station for communicating with a plurality of terminals through a system frequency band, the method comprising the steps of:
dividing a cell of the base station into at least two logical areas;
dividing the system frequency band into first and second Time Division Duplexing (TDD) subbands and one Frequency Division Duplexing (FDD) subband; and
communicating in different duplexing modes using at least one of the subbands according to a position of the terminal within the cell.
2. The communication method as claimed in claim 1 , wherein a TDD subband is divided into a TDD downlink resource and a TDD uplink resource, and the FDD subband is an FDD uplink resource.
3. The communication method as claimed in claim 1 , wherein the cell is divided into a first logical area, a second logical area, and a third logical area, each having a different concentric circle diameter.
4. The communication method as claimed in claim 3 , wherein an uplink resource and a downlink resource of the first TDD subband are allocated to a terminal located in the first logical area.
5. The communication method as claimed in claim 3 , wherein an uplink resource of the first TDD subband and a downlink resource of the second TDD subband are allocated to a terminal located in the first logical area.
6. The communication method as claimed in claim 3 , wherein a downlink resource of the first TDD subband and a FDD uplink resource are allocated to a terminal located in the first logical area.
7. The communication method as claimed in claim 3 , wherein an uplink resource and a downlink resource of the second TDD subband are allocated to a terminal located in the second logical area.
8. The communication method as claimed in claim 3 , wherein a downlink resource of the first TDD subband and a FDD uplink resource are allocated to a terminal located in the second logical area.
9. The communication method as claimed in claim 3 , wherein a downlink resource of the second TDD subband and a FDD uplink resource are allocated to a terminal located in the second logical area.
10. The communication method as claimed in claim 3 , wherein downlink resources of the first TDD subband and the second TDD subband are allocated in series and a FDD uplink resource is allocated to a terminal located in the third logical area.
11. The communication method as claimed in claim 3 , wherein an uplink resource and a downlink resource of the second TDD subband are allocated to a terminal located in the third logical area.
12. The communication method as claimed in claim 3 , wherein a downlink resource of the second TDD subband and a FDD uplink resource are allocated to a terminal located in the third logical area.
13. The communication method as claimed in claim 3 , wherein one of a combination of an uplink resource and a downlink resource of the first TDD subband, a combination of the uplink resource of the first TDD subband and a downlink resource of the second TDD subband, a combination of the downlink resource of the first TDD subband and an uplink resource of the second TDD subband, and a combination of the downlink resource of the first TDD subband and a FDD uplink resource is allocated to a terminal located in the first logical area.
14. The communication method as claimed in claim 13 , wherein the combination allocated to the terminal located in the first logical area is converted into the downlink resource of the second TDD subband and the FDD uplink resource when a handoff is requested.
15. The communication method as claimed in claim 3 , wherein one of a combination of an uplink resource and a downlink resource of the second TDD subband, a combination of a downlink resource of the first TDD subband and a FDD uplink resource, and a combination of the downlink resource of the second TDD subband and the FDD uplink resource is allocated to a terminal located in the second logical area.
16. The communication method as claimed in claim 15 , wherein if one of the combination of the uplink resource and the downlink resource of the second TDD subband and the combination of the downlink resource of the first TDD subband and the FDD uplink resource is allocated to the terminal located in the second logical area, the allocated combination is converted into the combination of the downlink resources of the first TDD subband and the second TDD subband and the FDD uplink resource when a handoff is requested.
17. The communication method as claimed in claim 15 , wherein if one of the combination of the uplink resource and the downlink resource of the second TDD subband and the combination of the downlink resource of the first TDD subband and the FDD uplink resource is allocated to the terminal located in the second logical area, the allocated combination is converted into the combination of the downlink resources of the second TDD subband and the FDD uplink resource when a handoff is requested.
18. The communication method as claimed in claim 3 , wherein one of a combination of uplink resources of the first TDD subband and the second TDD subband and a FDD uplink resource, a combination of the uplink resource and a downlink resource of the second TDD subband, and a combination of the downlink resource of the second TDD subband and the FDD uplink resource is allocated to a terminal located in the third logical area.
19. The communication method as claimed in claim 18 , wherein if the combination of the uplink resource and the downlink resource of the second TDD subband is allocated to the terminal located in the third logical area, the allocated combination is converted into the combination of the downlink resources of the first TDD subband and the second TDD subband and the FDD uplink resource when a handoff is requested.
20. The communication method as claimed in claim 18 , wherein if the combination of the uplink resource and the downlink resource of the second TDD subband is allocated to the terminal located in the third logical area, the allocated combination is converted into the combination of the downlink resource of the second TDD subband and the FDD uplink resource when a handoff is requested.
21. The communication method as claimed in claim 1 , wherein the first TDD subband has a bandwidth wider than a bandwidth of the second TDD subband.
22. The communication method as claimed in claim 1 , wherein time points of uplink/downlink mode conversion of the first TDD subband and the second TDD subband are independently adjusted.