Method of inter-system coexistence and spectrum sharing for dynamic spectrum access networks-on-demand spectrum contention
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04W-004/00
출원번호
US-0963351
(2010-12-08)
등록번호
US-8503383
(2013-08-06)
발명자
/ 주소
Hu, Wendong
Vlantis, George A.
출원인 / 주소
STMicroelectronics, Inc.
대리인 / 주소
Hogan Lovells US LLP
인용정보
피인용 횟수 :
8인용 특허 :
24
초록▼
This invention relates to cognitive radio based wireless communications of dynamic spectrum access networks, and more particularly to a method of addressing inter-systems (cells) coexistence and spectrum sharing. The described method of spectrum sharing called On-Demand Spectrum Contention, integrat
This invention relates to cognitive radio based wireless communications of dynamic spectrum access networks, and more particularly to a method of addressing inter-systems (cells) coexistence and spectrum sharing. The described method of spectrum sharing called On-Demand Spectrum Contention, integrates Dynamic Frequency Selection and Transmission Power Control with iterative on-demand spectrum contentions and provides fairness, adaptability, and efficiency of spectrum access for dynamic spectrum access systems using active inter-system coordination.
대표청구항▼
1. A spectrum sharing method comprising: performing channel evaluations and channel selections to detect and select spectrum holes;verifying if non-exclusive sharing of selected channels is feasible;if non-exclusive sharing of the selected channels is feasible, making a dynamic frequency selection (
1. A spectrum sharing method comprising: performing channel evaluations and channel selections to detect and select spectrum holes;verifying if non-exclusive sharing of selected channels is feasible;if non-exclusive sharing of the selected channels is feasible, making a dynamic frequency selection (DFS) decision and scheduling data transmissions on the selected channels with appropriate transmission power control (TPC) settings;if non-exclusive sharing is unfeasible, performing exclusive sharing of the selected channels;if the selected spectrum hole is not occupied, then performing data transmissions without using the selected channels if possible; andif the selected spectrum hole is occupied, initiating a spectrum contention process for ownership of the selected channels,wherein a non-exclusive spectrum sharing method is feasible as long as a maximum achievable signal-to-interference-ratio (SIR) on the selected channel is higher than a required SIR. 2. The method of claim 1 wherein non-exclusive sharing of a selected channel comprises sharing the selected channel through transmission power control (TPC). 3. The method of claim 1 wherein the spectrum contention process comprises a contention request function. 4. The method of claim 1 wherein the spectrum contention process comprises a contention resolution function in which spectrum contentions are resolved. 5. The method of claim 1 wherein the spectrum contention process comprises a contention response function. 6. The method of claim 1 wherein, if the contention process Succeeds, making a DFS decision and scheduling data transmissions. 7. The method of claim 1 wherein DFS announcing and dynamic frequency hopping collision avoidance (DFH/CA) take place before data transmissions are performed on acquired channels. 8. The method of claim 1 wherein, if the contention fails, performing data transmissions without using the selected channels if possible. 9. The method of claim 1 wherein internal demands and external demands initiate iterations of the spectrum sharing process. 10. The method of claim 1 further comprising receiving an internal demand. 11. The method of claim 1 wherein the internal demand is generated when the service workload exceeds the channel capacity. 12. The method of claim 1 wherein an internal demand is generated and initiates an iteration of the spectrum sharing process. 13. The method of claim 1 further comprising receiving an external demand. 14. The method of claim 13 wherein, when the external demand is received, initiating a spectrum contention iteration. 15. The method of claim 1 wherein channel evaluation and selection include radio frequency (RF) sensing, measurement evaluations, measurement reporting, report processing and frequency selection. 16. The method of claim 1 wherein DFS announcing and dynamic frequency hopping collision avoidance (DFH/CA) take place before data transmissions are performed on the selected channels. 17. The method of claim 1 wherein, after losing a channel, performing another iteration of spectrum contention process initiated by internal demands in order to acquire sufficient bandwidth to maintain the quality of service of the on-going data transmission services. 18. The method of claim 1 further comprising an iterative process that is initiated by either internal or external demands adapting to workload and environment conditions. 19. A spectrum sharing method comprising: performing channel evaluations and channel selections to detect and select spectrum holes;verifying if non-exclusive sharing of selected channels is feasible;if non-exclusive sharing of the selected channels is feasible, making a dynamic frequency selection (DFS) decision and scheduling data transmissions on the selected channels with appropriate transmission power control (TPC) settings;if non-exclusive sharing is unfeasible, performing exclusive sharing of the selected channels;if the selected spectrum hole is not occupied, then performing data transmissions without using the selected channels if possible; andif the selected spectrum hole is occupied, initiating a spectrum contention process for ownership of the selected channels,wherein, for losing the spectrum contention, providing a contention response message including the time at which the occupied channel will be released. 20. The method of claim 19 wherein data transmissions are continued up to a maximum grace period before the channel is released. 21. A spectrum sharing method comprising: performing channel evaluations and channel selections to detect and select spectrum holes;verifying if non-exclusive sharing of selected channels is feasible;if non-exclusive sharing of the selected channels is feasible, making a dynamic frequency selection (DFS) decision and scheduling data transmissions on the selected channels with appropriate transmission power control (TPC) settings;if non-exclusive sharing is unfeasible, performing exclusive sharing of the selected channels;if the selected spectrum hole is not occupied, then performing data transmissions without using the selected channels if possible; andif the selected spectrum hole is occupied, initiating a spectrum contention process for ownership of the selected channels,wherein, after winning a channel, announcing a DFS decision with respect to using the winning channel and schedules data transmission services on the winning channel.
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이 특허에 인용된 특허 (24)
Sugar, Gary L.; Diener, Neil R., Ad-hoc control protocol governing use of an unlicensed or shared radio frequency band.
Rentel, Carlos H.; Pereira, Luis R.; Gutierrez, Jose A., Channel hopping method of interference avoidance for a wireless communication network and wireless communication system employing the same.
Bantz David F. (Chappaqua NY) Bauchot Frederick J. (LaTourraque Saint-Jeannet FRX) Huang Chia-Chi (Hsinchu TWX) Lanne Fabien P. (Saint Laurent du var NY FRX) Natarajan Kadathur S. (Millwood NY) Wette, Frequency hopping pattern assignment and control in multiple autonomous collocated radio networks.
Takiyasu Yoshihiro,JPX ; Amada Eiichi,JPX ; Ishifuji Tomoaki,JPX ; Ishii Genichi,JPX ; Jusa Hidehiko,JPX ; Adachi Shuichi,JPX, Frequency hopping wireless communication system and communication equipment.
Buchwald, Gregory J.; Ecklund, Lawrence M.; Gillig, Steven F.; Mansfield, Terry K., Method and apparatus for determining appropriate channels for communication.
Newberg, Donald G.; Biggs, Robert A.; Keller, Matthew C.; LoGalbo, Robert D.; Mathis, James E.; McDonald, Daniel J., Methods for informing subscribers of adjacent sites.
Yi, Seung Baek; Tsai, Kun Ting; Yee, Paul V.; Ngo, Terry F. K.; Kurniawan, Erick, Over the air signaling of dynamic frequency selection (DFS) operating parameters to client devices.
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