Method and apparatus for use in cooperative relays using incremental redundancy and distributed spatial multiplexing
First Claim
Patent Images
1. A wireless transmit/receive unit (WTRU) comprising:
- a receiver configured to receive, following a first phase transmission, a plurality of transmissions in a second phase, wherein each of the plurality of transmissions in the second phase are received from a base station (BS) over a BS link and a relay station (RS) over an RS link,wherein each of the plurality of transmissions in the second phase contains a subset of bits transmitted in the first phase transmission and contains a plurality of bits coded with different redundancy versions (RVs),wherein during the second phase transmissions, a first portion of the plurality of bits is received over the BS link and a second portion of the plurality of bits is received over the RS link,wherein the RS link is allocated a greater proportion of the plurality of bits on a condition that a link Quality of the RS link is stronger than a link Quality of the BS link, andwherein the BS link is allocated a greater proportion of the plurality of bits on a condition that the link quality of the BS link is stronger than the link quality of the RS link;
a processor configured to process the plurality of bits;
a buffer configured to combine the plurality of bits based on a link quality between the BS and the RS in the first phase transmission;
a decoder configured to decode the combined plurality of bits; and
a transmitter configured to transmit, in the second phase, a first channel quality index (CQI) feedback to the BS and a second CQI feedback to the RS.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus are used in cooperative relays with incremental redundancy (IR) and distributed spatial multiplexing. A wireless transmit/receive unit (WTRU) may listen to the base station (BS) transmission during Phase 1 of the communication, and use cooperation between a relay station (RS) and the BS for the data transmission during Phase 2 to improve performance. During Phase 2, both the BS and the RS may transmit data to the WTRU, using either distributed Space Time Block Codes/Space Frequency Block Codes (STBC/SFBC) or distributed spatial multiplexing.
-
Citations
20 Claims
-
1. A wireless transmit/receive unit (WTRU) comprising:
-
a receiver configured to receive, following a first phase transmission, a plurality of transmissions in a second phase, wherein each of the plurality of transmissions in the second phase are received from a base station (BS) over a BS link and a relay station (RS) over an RS link, wherein each of the plurality of transmissions in the second phase contains a subset of bits transmitted in the first phase transmission and contains a plurality of bits coded with different redundancy versions (RVs), wherein during the second phase transmissions, a first portion of the plurality of bits is received over the BS link and a second portion of the plurality of bits is received over the RS link, wherein the RS link is allocated a greater proportion of the plurality of bits on a condition that a link Quality of the RS link is stronger than a link Quality of the BS link, and wherein the BS link is allocated a greater proportion of the plurality of bits on a condition that the link quality of the BS link is stronger than the link quality of the RS link; a processor configured to process the plurality of bits; a buffer configured to combine the plurality of bits based on a link quality between the BS and the RS in the first phase transmission; a decoder configured to decode the combined plurality of bits; and a transmitter configured to transmit, in the second phase, a first channel quality index (CQI) feedback to the BS and a second CQI feedback to the RS. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A wireless communications method for a wireless transmit/receive unit (WTRU) comprising:
-
receiving, following a first phase transmission, a plurality of transmissions in a second phase, wherein each of the plurality of transmissions in the second phase are received from a base station (BS) over a BS link and a relay station (RS) over an RS link, wherein each of the plurality of transmissions in the second phase contains a subset of bits transmitted in the first phase transmission and contains a plurality of bits coded with different redundancy versions (RVs), wherein during the second phase transmissions, a first portion of the plurality of bits is received over the BS link and a second portion of the plurality of bits is received over the RS link, wherein the RS link is allocated a greater proportion of the plurality of bits on a condition that a link quality of the RS link is stronger than a link quality of the BS link, and wherein the BS link is allocated a greater proportion of the plurality of bits on a condition that the link quality of the BS link is stronger than the link quality of the RS link; processing the plurality of bits; combining the plurality of bits based on a link quality between the BS and the RS in the first phase transmission; decoding the combined plurality of bits; and transmitting, in the second phase, a first channel quality index (CQI) feedback to the BS and a second CQI feedback to the BS. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification