IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0670056
(2000-09-25)
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발명자
/ 주소 |
- Moon,Billy G.
- Smith,Malcolm M.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
3 인용 특허 :
17 |
초록
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A wireless communications system includes a core packet network coupled to multiple base transceiver stations, each station providing wireless services to mobile units. The system supports simultaneous, parallel, wireless communications links between a mobile unit and multiple base transceiver stati
A wireless communications system includes a core packet network coupled to multiple base transceiver stations, each station providing wireless services to mobile units. The system supports simultaneous, parallel, wireless communications links between a mobile unit and multiple base transceiver stations by selecting between copies of packets received by each base transceiver station. Thus, the system includes devices for selecting between multiple copies of each packet received from a mobile unit.
대표청구항
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What is claimed is: 1. A mobile unit comprising: a wireless interface operable to: couple to an initial base transceiver station (BTS) using an initial wireless link; receive an indication to use a selection group in response to an initial metric associated with the initial wireless link falling b
What is claimed is: 1. A mobile unit comprising: a wireless interface operable to: couple to an initial base transceiver station (BTS) using an initial wireless link; receive an indication to use a selection group in response to an initial metric associated with the initial wireless link falling below a threshold, wherein the selection group comprises a plurality of BTSs and the indication indicates to couple to the plurality of BTSs in the selection group using separate wireless links; couple to a first BTS in the selection group using a first wireless link; couple to a second BTS in the selection group using a second wireless link; receive a first graded packet from the first BTS using the first wireless link, wherein the first graded packet includes a first metric associated with the first wireless link; and receive a second graded packet from the second BTS using a the second wireless link, wherein the second graded packet includes a second metric associated with the second wireless link; and a processor operable to compare the first metric and the second metric and to select either the first graded packet or the second graded packet based on the comparison. 2. The mobile unit of claim 1, wherein the first graded packet further includes a packet identifier, and the second graded packet further includes the packet identifier. 3. The mobile unit of claim 1, wherein the first graded packet and the second graded packet each further includes voice information from a remote device. 4. The mobile unit of claim 3, further comprising an output device operable to generate an audio signal based on the voice information from the selected graded packet. 5. The mobile unit of claim 1, wherein the first metric is encoded in the first graded packet by the first BTS, and the second metric is encoded in the second graded packet by the second BTS. 6. The mobile unit of claim 1, wherein each of the first metric and the second metric is a selected one of a signal strength, a signal-to-noise ratio, a bit error rate, and a carrier-to-noise ratio. 7. The mobile unit of claim 1, further comprising an input device operable to receive voice information from a user, the processor further operable to generate a packet encoding the voice information, and the wireless interface further operable to communicate the packet for reception by the first BTS and the second BTS. 8. The mobile unit of claim 1, wherein the wireless interface is further operable to: receive a second indication to discontinue use of the selection group and to use a primary BTS, wherein the primary BTS is a selected one of the BTSs in the selection group; and receive a third packet from the primary BTS using a primary wireless link, wherein the third packet includes voice information from a remote device. 9. The mobile unit of claim 8, wherein the primary BTS is selected based on characteristics associated with the primary link. 10. A method for selecting between a plurality of packets received by a mobile unit, the method comprising: establishing an initial wireless link using an initial base transceiver station (BTS); receiving an indication to use a selection group in response to an initial metric associated with the initial wireless link falling below a threshold, wherein the selection group comprises a plurality of BTSs and the indication indicates to couple to the plurality of BTSs in the selection group using separate wireless links; establishing a first wireless link with a first BTS in the selection group; establishing a second wireless link with a second BTS in the selection group; receiving a first graded packet from the first BTS, wherein the first graded packet encodes a first metric associated with the first wireless link; receiving a second graded packet from the second BTS, wherein the second graded packet encodes a second metric associated with the second wireless link; comparing the first metric and the second metric; and selecting either the first graded packet or the second graded packet based on the comparison. 11. The method of claim 10, wherein the first graded packet further includes a packet identifier, and the second graded packet further includes the packet identifier. 12. The method of claim 10, wherein the first metric is encoded in the first graded packet by the first BTS, and the second metric is encoded in the second graded packet by the second BTS. 13. The method of claim 10, wherein each of the first metric and the second metric is a selected one of a signal strength, a signal-to-noise ratio, a bit error rate, and a carrier-to-noise ratio. 14. The method of claim 10, further comprising: receiving voice information from a user; generating a packet encoding the voice information; and communicating the packet for reception by the first BTS and the second BTS. 15. The method of claim 10, wherein the first graded packet and the second graded packet each further includes voice information from a remote device. 16. The method of claim 15, further comprising generating an audio signal based on the voice information from the selected graded packet. 17. The method of claim 10, further comprising: determining to discontinue use of the selection group and to use a primary BTS, wherein the primary BTS is a selected one of the BTSs in the selection group; and receiving a third packet from the primary BTS using a primary wireless link, wherein the third packet includes voice information from a remote device. 18. The method of claim 17, wherein the primary BTS is selected based on characteristics associated with the primary link. 19. A mobile unit comprising: means for establishing an initial wireless link using an initial base transceiver station (BTS); means for receiving an indication to use a selection group in response to an initial metric associated with the initial wireless link falling below a threshold, wherein the selection group comprises a plurality of BTSs and the indication indicates to couple to the plurality of BTSs in the selection group using separate wireless links; means for establishing a first wireless link with a first BTS in the selection group; means for establishing a second wireless link with a second BTS in the selection group; means for receiving a first graded packet from the first BTS, wherein the first graded packet encodes a first metric associated with the first wireless link; means for receiving a second graded packet from the second BTS, wherein the second graded packet encodes a second metric associated with the second wireless link; means for comparing the first metric and the second metric; and means for selecting either the first graded packet or the second graded packet based on the comparison. 20. The mobile unit of claim 19, wherein each of the first metric and the second metric is a selected one of a signal strength, a signal-to-noise ratio, a bit error rate, and a carrier-to-noise ratio. 21. The mobile unit of claim 19, further comprising: means for receiving voice information from a user; means for generating a packet encoding the voice information; and means for communicating the packet for reception by the first BTS and the second BTS. 22. The mobile unit of claim 19, wherein the first graded packet further includes a packet identifier, and the second graded packet further includes the packet identifier. 23. The mobile unit of claim 19, wherein the first metric is encoded in the first graded packet by the first BTS, and the second metric is encoded in the second graded packet by the second BTS. 24. The mobile unit of claim 19, wherein the first graded packet and the second graded packet each further includes voice information from a remote device. 25. The mobile unit of claim 24, further comprising means for generating an audio signal based on the voice information from the selected graded packet. 26. The mobile unit of claim 19, further comprising: means for determining to discontinue use of the selection group and to use a primary BTS, wherein the primary BTS is a selected one of the BTSs in the selection group; and means for receiving a third packet from the primary BTS using a primary wireless link, wherein the third packet includes voice information from a remote device. 27. The mobile unit of claim 26, wherein the primary BTS is selected based on characteristics associated with the primary link. 28. Software for selecting between a plurality of packets received by a mobile unit, the software embodied on a computer readable medium and operable to: establish an initial wireless link using an initial base transceiver station (BTS); receive an indication to use a selection group in response to an initial metric associated with the initial wireless link falling below a threshold, wherein the selection group comprises a plurality of BTSs and the indication indicates to couple to the plurality of BTSs in the selection group using separate wireless links; establish a first wireless link with a first BTS in the selection group; establish a second wireless link with a second BTS in the selection group; receive a first graded packet from the first BTS, wherein the first graded packet encodes a first metric associated with the first wireless link; receive a second graded packet from the second BTS, wherein the second graded packet encodes a second metric associated with the second wireless link; compare the first metric and the second metric; and select either the first graded packet or the second graded packet based on the comparison. 29. The software of claim 28, wherein the first graded packet further includes a packet identifier, and the second graded packet further includes the packet identifier. 30. The software of claim 28, wherein the first metric is encoded in the first graded packet by the first BTS, and the second metric is encoded in the second graded packet by the second BTS. 31. The software of claim 28, wherein each of the first metric and the second metric is a selected one of a signal strength, a signal-to-noise ratio, a bit error rate, and a carrier-to-noise ratio. 32. The software of claim 28, further operable to: receive voice information from a user; generate a packet encoding the voice information; and communicate the packet for reception by the first BTS and the second BTS. 33. The software of claim 28, wherein the first graded packet and the second graded packet each further includes voice information from a remote device. 34. The software of claim 33, further operable to generate an audio signal based on the voice information from the selected graded packet. 35. The software of claim 28, further operable to: determine to discontinue use of the selection group and to use a primary BTS, wherein the primary BTS is a selected one of the BTSs in the selection group; and receive a third packet from the primary BTS using a primary wireless link, wherein the third packet includes voice information from a remote device. 36. The software of claim 35, wherein the primary BTS is selected based on characteristics associated with the primary link.
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