IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0128636
(2002-04-23)
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| 등록번호 |
US-9178577
(2015-11-03)
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| 우선권정보 |
GB-0110125.2 (2001-04-25) |
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발명자
/ 주소 |
- Moulsley, Timothy J.
- Baker, Matthew P. J.
- Hunt, Bernard
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| 출원인 / 주소 |
|
| 인용정보 |
피인용 횟수 :
0 인용 특허 :
55 |
초록
▼
A radio communication system comprises a communication channel for the transmission of data packets (302) from a primary station having a plurality of antennas to a secondary station having at least one antenna. The channel comprises a plurality of paths, and the primary station transmits a pluralit
A radio communication system comprises a communication channel for the transmission of data packets (302) from a primary station having a plurality of antennas to a secondary station having at least one antenna. The channel comprises a plurality of paths, and the primary station transmits a plurality of packets substantially simultaneously. Each of the plurality of packets is transmitted via a different subset of the plurality of paths, for example by arranging for each packet to be transmitted via a different antenna or antenna beam. The secondary station receives the plurality of data packets, determines whether each packet is received correctly and signals this determination (typically as an acknowledgement (304) or a negative acknowledgement (306)) to the primary station for each of the plurality of packets. The signaling may be by any convenient means, for example transmitting each acknowledgement or negative acknowledgement via a different subset of available uplink paths.
대표청구항
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1. A radio communication system having a communication channel comprising: a primary station having a plurality of antennas;a secondary station having at least one antenna; anda plurality of paths between the primary station and the secondary station,the primary station further comprising: means for
1. A radio communication system having a communication channel comprising: a primary station having a plurality of antennas;a secondary station having at least one antenna; anda plurality of paths between the primary station and the secondary station,the primary station further comprising: means for transmitting, substantially simultaneously, a plurality of data packets to the secondary station, the packets being transmitted via different subsets of the plurality of paths, andthe secondary station further comprising: means for: receiving the plurality of data packets,determining whether the data packets were received correctly,signaling said determination to the primary station for the plurality of packets,signaling to the primary station a number of simultaneous data streams that the secondary station is capable of receiving or processing, andreceiving a re-transmission of incorrectly received data packets via selected ones of the subsets of the plurality of paths, said selected ones of the subsets of the plurality of paths corresponding to the subsets of the plurality of paths utilized for an initial transmission of the incorrectly received data packets, andwherein at least one of a modulation scheme and a coding scheme for re-transmission of said data packets on said selected ones of the subsets of the plurality of paths is different from the modulation and coding scheme utilized for said selected ones of the subsets of the plurality of paths during said initial transmission of said data packets. 2. A primary station comprising: a plurality of antennas for use in a radio communication system having a communication channel comprising a plurality of paths between the primary station and a secondary station having at least one antenna: andmeans for: transmitting substantially simultaneously a plurality of data packets to the secondary station, the data packets being transmitted via different subsets of the plurality of paths,receiving from the secondary station a determination of whether the data packets were received incorrectly, said determination including capacity information indicating a number of simultaneous data streams that the secondary station is capable of receiving or processing; andre-transmitting said data packets determined to be received incorrectly via selected ones of the subsets of the plurality of paths, said selected ones of the subsets of the plurality of paths being selected based at least on a quality of conditions of said subsets of the plurality of paths, and wherein at least one of a modulation scheme and a coding scheme for re-transmission of said data packets on said selected ones of the subsets of the plurality of paths is different from the modulation and coding scheme utilized for said selected ones of the subsets of the plurality of paths during an initial transmission of said data packets. 3. The primary station as claimed in claim 2, further comprising: means for mapping each data packet to one of the plurality of antennas. 4. The primary station as claimed in claim 2, further comprising: means for mapping each data packet to a respective antenna beam. 5. The primary station as claimed in claim 2, further comprising: means for varying transmission parameters relating to a data packet depending on the subset of the plurality of paths over which the packet is transmitted. 6. The primary station as claimed in claim 5, wherein the varied transmission parameters are selected from modulation scheme, coding scheme and transmit power level. 7. The primary station as claimed in claim 5, further comprising: closed loop power control means for adjusting independently a transmit power of each subset of paths. 8. A secondary station comprising: at least one antenna for use in a radio communication system having a communication channel comprising a plurality of paths between a primary station having a plurality of antennas and the secondary station; andmeans for: receiving a plurality of data packets transmitted substantially simultaneously by the primary station, the packets being transmitted via different subsets of the plurality of paths,determining whether each data packet is received correctly,signaling said determination to the primary station for the plurality of data packets,signaling to the primary station a number of simultaneous data streams that the secondary station is capable of receiving or processing; andreceiving a re-transmission of incorrectly received data packets via selected ones of the subsets of the plurality of paths, said selected ones of the subsets of the plurality of paths corresponding to the subsets of the plurality of paths utilized for an initial transmission of the incorrectly received data packets, andwherein at least one of a modulation scheme and a coding scheme for re-transmission of said data packets on said selected ones of the subsets of the plurality of paths is different from the modulation and coding scheme utilized for said selected ones of the subsets of the plurality of paths during said initial transmission of said data packets. 9. The secondary station as claimed in claim 8, wherein a communication channel between the secondary station and the primary station comprises a subset of the plurality of paths, and said means further comprises: means for transmitting substantially simultaneously acknowledgements corresponding to each of the simultaneously transmitted data packets, each acknowledgement being transmitted via a different subset of the plurality of paths. 10. The secondary station as claimed in claim 8, further comprising: means for signaling channel quality feedback information to the primary station, the information relating to each of the subsets of paths used to transmit data packets. 11. The secondary station as claimed in claim 8, wherein the number of simultaneous data streams are transmitted via subsets of the plurality of paths using same air interface resources. 12. The secondary station as claimed in claim 11, wherein the system operates according to a code division multiple access protocol and wherein air interface resources comprise channelization and spreading codes. 13. A method of operating a radio communication system having a communication channel comprising a plurality of paths between a primary station having a plurality of antennas and a secondary station having at least one antenna, the method comprising: transmitting, by the primary station, substantially simultaneously, a plurality of data packets to the secondary station, the data packets being transmitted via different subsets of the plurality of paths;receiving, by the secondary station, the plurality of data packets;determining, by the secondary station, whether the plurality of data packets were received correctly;signaling said determination to the primary station;signaling to the primary station a number of simultaneous data streams that the secondary station is capable of receiving or processing; andreceiving a re-transmission of incorrectly received data packets via selected ones of the subsets of the plurality of paths, said selected ones of the subsets of the plurality of paths corresponding to the subsets of the plurality of paths utilized for an initial transmission of the incorrectly received data packets, andwherein at least one of a modulation scheme and a coding scheme for re-transmission of said data packets on said selected ones of the subsets of the plurality of paths is different from the modulation and coding scheme utilized for said selected ones of the subsets of the plurality of paths during said initial transmission of said data packets. 14. A primary station comprising: a plurality of antennas for use in a radio communication system having a communication channel comprising a plurality of paths between the primary station and a secondary station having at least one antenna: anda transceiver configured to: transmit, substantially simultaneously, a plurality of data packets to the secondary station, the data packets being transmitted via different subsets of the plurality of paths,receive from the secondary station an indication of said data packets received incorrectly, said indication including capacity information indicating a number of simultaneous data streams that the secondary station is capable of receiving; andre-transmit incorrectly received data packets via selected ones of the subsets of the plurality of paths, said selected ones of the subsets of the plurality of paths corresponding to the subsets of the plurality of paths utilized for an initial transmission of the incorrectly received data packets, andwherein at least one of a modulation scheme and a coding scheme for re-transmission of said data packets on said selected ones of the subsets of the plurality of paths is different from the modulation and coding scheme utilized for said selected ones of the subsets of the plurality of paths during said initial transmission of said data packets. 15. The primary station as claimed in claim 14, further comprising: a processor configured to: map each data packet to one of the plurality of antennas;apply weights for mapping each data packet to a respective antenna beam; andvary one of the modulation scheme, the coding scheme and a transmit power level used for transmitting the data packet, said one of said modulation scheme, said coding scheme, and said transmit power level selected based on the subset of the plurality of paths over which the data packet is transmitted. 16. The primary station as claimed in claim 14, further comprising: a closed loop power controller, said close loop power controller adjusting, independently, a transmit power of each subset of the plurality of paths. 17. A secondary station comprising: at least one antenna for use in a radio communication system having a communication channel comprising a plurality of paths between a primary station having a plurality of antennas and the secondary station; anda transceiver configured to: receive a plurality of data packets transmitted substantially simultaneously by the primary station, the packets being transmitted via different subsets of the plurality of paths,signal a determination of which data packets are received correctly to the primary station,signal to the primary a number of simultaneous data streams that the secondary station is capable of receiving; andreceive a re-transmission of incorrectly received data packets via selected ones of the subsets of the plurality of paths, said selected ones of the subsets of the plurality of paths corresponding to the subsets of the plurality of paths utilized for an initial transmission of the incorrectly received data packets, andwherein at least one of a modulation scheme and a coding scheme for re-transmission of said data packets on said selected ones of the subsets of the plurality of paths is different from the modulation and coding scheme utilized for said selected ones of the subsets of the plurality of paths during said initial transmission of said data packets. 18. The secondary station as claimed in claim 17, wherein said transceiver is configured to: transmit, substantially simultaneously, acknowledgements corresponding to each of the simultaneously received data packets, each acknowledgement being transmitted via a different subset of the plurality of paths. 19. The secondary station as claimed in claim 17, wherein said transceiver is configured to: signal channel quality feedback information to the primary station, the information relating to each of the subsets of paths used to transmit data packets. 20. The secondary station as claimed in claim 17, wherein the simultaneous data streams are transmitted via subsets of the plurality of paths using the same air interface resources.
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