IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0563877
(2009-09-21)
|
등록번호 |
US-8315657
(2012-11-20)
|
발명자
/ 주소 |
- van Rensburg, Cornelius
- Hosein, Patrick Ahamad
- Soong, Anthony C. K.
|
출원인 / 주소 |
- FutureWei Technologies, Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
10 |
초록
▼
A system and method for enabling coordinated beam switching and scheduling in a wireless communications system. A method for controller operation includes indicating that the controller is operating in a cooperative beam switching mode, transmitting a beam formed reference signal (BFRS), from each c
A system and method for enabling coordinated beam switching and scheduling in a wireless communications system. A method for controller operation includes indicating that the controller is operating in a cooperative beam switching mode, transmitting a beam formed reference signal (BFRS), from each communications device being served by the controller, receiving a measurement of a communications channel between the controller and the communications device and an indicator indicating a transmission unit corresponding to the measurement of the communications channel, receiving a transmission intended for a communications device, and causing the transmission to be transmitted to the communications device. The BFRS is beam formed using a plurality of beam patterns, the beam pattern used in beam forming the BFRS changes once per transmission unit, and the transmission is transmitted using measurement of the communications channel and the indicator from the communications device.
대표청구항
▼
1. A method for controller operation, the method comprising: indicating that the controller is operating in a cooperative beam switching mode with one or more other controllers;transmitting a beam formed reference signal (BFRS), wherein the BFRS is beam formed using a plurality of beam patterns, and
1. A method for controller operation, the method comprising: indicating that the controller is operating in a cooperative beam switching mode with one or more other controllers;transmitting a beam formed reference signal (BFRS), wherein the BFRS is beam formed using a plurality of beam patterns, and wherein a beam pattern used in beam forming the BFRS changes once per transmission unit;receiving an indicator of a transmission unit having a highest quality measurement of a communications channel between the controller and a communications device, and receiving the measurement of the communications channel, from each communications device being served by the controller;receiving a transmission intended for a communications device; andcausing the transmission to be transmitted to the communications device, wherein the transmission is transmitted using the measurement of the communications channel and the indicator from the communications device. 2. The method of claim 1, further comprising, transmitting a period of the plurality of beam patterns. 3. The method of claim 2, wherein there are multiple controllers operating in a communications system, and wherein the period is equal for each controller. 4. The method of claim 2, wherein indicating that the controller is operating in a cooperative beam switching mode and transmitting a period each comprises transmitting a layer three message. 5. The method of claim 1, further comprising, transmitting a number of measurements of a communications channel and indicators that each communications device is to send to the controller. 6. The method of claim 1, wherein the measurement of a communications channel comprises a maximum signal plus noise to interference ratio measurement of the communications channel made during a period of the plurality of beam patterns. 7. The method of claim 1, wherein the measurement of a communications channel comprises N largest signal plus noise to interference ratio measurement of the communications channel made during a period of the plurality of beam patterns, where N is a positive integer value. 8. The method of claim 1, wherein causing the transmission to be transmitted comprises: allocating a network resource during a transmission unit corresponding to the indicator; andtransmitting the transmission at an occurrence of the allocated network resource. 9. The method of claim 1, wherein a transmission unit corresponding to the indicator does not have sufficient network resources to transmit an entirety of the transmission, and wherein causing the transmission to be transmitted comprises: allocating a first network resource during the transmission unit in a first period corresponding to the indicator to a first portion of the transmission;transmitting the first portion of the transmission at an occurrence of the allocated first network resource;allocating a second network resource during the transmission unit in a second period corresponding to the indicator to a second portion of the transmission; andtransmitting the second portion of the transmission at an occurrence of the allocated second network resource. 10. A method for communications device operation, the method comprising: measuring a communications channel between the communications device and a controller for each beam pattern in a beam formed reference signal (BFRS) transmitted by the controller, wherein the BFRS is beam formed using a plurality of beam patterns, and wherein a beam pattern used in beam forming the BFRS changes once per transmission unit;selecting a communications channel measurement having a highest quality value, and selecting an indicator indicating a transmission unit corresponding to the selected communications channel measurement; andtransmitting the communications channel measurement and the indicator to the controller. 11. The method of claim 10, further comprising, receiving a number of transmission units in a period of the plurality of beam patterns from the controller. 12. The method of claim 10, wherein the BFRS is cyclically beam formed using the plurality of beam patterns, and wherein measuring a communications channel comprises measuring the communications channel for multiple cycles. 13. The method of claim 12, wherein measuring a communications channel further comprises: averaging a communications channel measurement made during a first transmission unit in a first cycle with a communications channel measurement made during a second transmission unit in a second cycle, wherein the first transmission unit and the second transmission unit occur at a same time in the first cycle and the second cycle; andrepeating the averaging for every transmission unit. 14. The method of claim 10, wherein selecting a communications channel measurement comprises, selecting a highest signal plus noise to interference ratio communications channel measurement. 15. The method of claim 14, wherein there are more than one communications channel measurement that are substantially equal, and wherein selecting a communications channel measurement comprises, selecting a communications channel measurement from the more than one communications channel measurement that are substantially equal with a history of higher signal plus noise to interference ratio communications channel measurements. 16. The method of claim 10, wherein selecting a communications channel measurement comprises selecting an N largest communications channel measurements, where N is a positive integer value. 17. The method of claim 10, wherein measuring a communications channel comprises, measuring a signal plus interference to noise ratio (SINR) of the communications channel over a transmission unit. 18. A communications system comprising: a plurality of wireless controllers, wherein an in-use subset of the wireless controllers is wirelessly coupled to at least one communications device in a plurality of communications devices, wherein a subset of the plurality of wireless controllers is operating in a cooperative beam switching mode (CBSM), wherein each of the wireless controllers operating in the CBSM is configured to transmit a unique beam formed reference signal (BFRS), wherein the BFRS is beam formed using a plurality of beam patterns, and wherein a beam pattern used in beam forming the BFRS changes once per transmission unit, and configured to receive a maximum quality measurement of a communications channel, and an indicator of a transmission unit corresponding to the maximum quality measurement, from each of a plurality of communications devices it is serving; anda central controller coupled the plurality of wireless controllers, the central controller is configured to determine a period of the plurality of beam patterns for each wireless controller. 19. The communications system of claim 18, wherein each communications device operating in the CBSM measures the communications channel once per transmission unit. 20. The communications system of claim 18, wherein the maximum quality measurement is a maximum signal plus noise to interference ratio. 21. The communications system of claim 18, wherein each wireless controller operating in the CBSM is further configured to transmit a mode indicator indicating that it is operating in the CBSM. 22. The communications system of claim 18, wherein the unique BFRS is unique to each wireless controller operating in CBSM.
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