User equipment for physical layer automatic repeat request

Abstract

A user equipment for physical layer automatic repeat request is disclosed. The user equipment comprises a higher layer automatic repeat request (ARQ) mechanism, a physical layer transmitter, a physical layer receiver, an acknowledgment (ACK) transmitter and an adaptive modulation and control unit (AMC). A higher layer ARQ mechanism generates data for transmission. A physical layer transmitter receives the data for transmission from the higher layer ARQ mechanism, to format the received data into packets for transmission. A physical layer receiver receives and demodulates received packets and retransmission statistics. An ACK transmitter transmits a corresponding acknowledgment for a given packet at the physical layer receiver. An AMC unit adjusts a particular encoding/data modulation of each packet using collected retransmission statistics.

1 . A user equipment comprising:
 circuitry configure to use a first automatic repeat request (ARQ) to provide data blocks for transmission by a second ARQ; wherein the first ARQ stores the data blocks to repeatedly provide the stored data blocks for transmission by the second ARQ device on a condition that the data blocks are not successfully transmitted to a base station; and   wherein the circuitry is further configured to transmit the provided data blocks by the second ARQ using an N-channel stop and wait protocol; wherein each channel of the N-channels is transmitted in a different time slot; wherein each second ARQ transmission comprises turbo coded data of at least one of the data blocks and an appended error check sequence (ECS); wherein each second ARQ transmission is a single carrier-frequency domain equalization (SC-FDE) transmission; wherein the second ARQ is configured to retransmit using adaptive modulation and coding.   
     
     
         2 . The user equipment of  claim 1  wherein the second ARQ limits retransmission to a predetermined number. 
     
     
         3 . The user equipment of  claim 1  wherein the adaptive modulation and coding uses QPSK and QAM. 
     
     
         4 . The user equipment of  claim 3  wherein the adaptive modulation and coding uses QPSK, 16-QAM and 64-QAM. 
     
     
         5 . A method comprising:
 using, by a user equipment, a first automatic repeat request (ARQ) to provide data blocks for transmission by a second ARQ; wherein the first ARQ stores the data blocks to repeatedly provide the stored data blocks for transmission by the second ARQ device on a condition that the data blocks are not successfully transmitted to a base station; and   transmitting, by the user equipment, the provided data blocks using the second ARQ having an N-channel stop and wait protocol; wherein each channel of the N-channels is transmitted in a different time slot; wherein each second ARQ transmission comprises turbo coded data of at least one of the data blocks and an appended error check sequence (ECS); wherein each second ARQ transmission is a single carrier-frequency domain equalization (SC-FDE) transmission; and   retransmitting, by the user equipment, using the second ARQ utilizing adaptive modulation and coding.   
     
     
         6 . The method of  claim 5  wherein the second ARQ limits retransmission to a predetermined number. 
     
     
         7 . The method of  claim 5  wherein the adaptive modulation and coding uses QPSK and QAM. 
     
     
         8 . The method of  claim 7  wherein the adaptive modulation and coding uses QPSK, 16-QAM and 64-QAM. 
     
     
         9 . A base station comprising:
 circuitry configured to receive transmissions using a second automatic repeat request having an N-channel stop and wait protocol; wherein each channel of the N-channels is received in a different time slot; wherein each second ARQ transmission comprises turbo coded data of at least one of the data blocks and an appended error check sequence (ECS); wherein each second ARQ transmission is a single carrier-frequency domain equalization (SC-FDE) transmission; wherein the second ARQ is configured to receive retransmissions using adaptive modulation and coding; and   wherein the circuitry is further configured to use a first automatic repeat request (ARQ) to provide recover data blocks received by the second ARQ.   
     
     
         10 . The base station of  claim 9  wherein the second ARQ limits retransmissions to a predetermined number. 
     
     
         11 . The base station of  claim 9  wherein the adaptive modulation and coding uses QPSK and QAM. 
     
     
         12 . The base station of  claim 11  wherein the adaptive modulation and coding uses QPSK, 16-QAM and 64-QAM.