Method and apparatus for retransmission management for reliable hybrid arq process

Abstract

A method for transmitting a packet from a transmitter to a receiver in a wireless communication system begins by building a packet by a transport format combination (TFC) selection process, and the packet is transmitted from the transmitter to the receiver. If the transmitter receives an indication that the packet was not successfully received at the receiver, the packet is retransmitted via a hybrid automatic repeat request (HARQ) procedure. If the HARQ procedure did not successfully transmit the packet, then the packet is retransmitted via a retransmission management (RM) procedure. If the RM procedure did not successfully transmit the packet, then the packet is discarded by the transmitter.

Description

Method and apparatus for retransmission management for reliable hybrid ARQ processing technical field The present invention generally relates to a wireless communication system utilizing retransmission with Hybrid Automatic Repeat Request (HARQ), and more particularly, to a technique for providing reliable packet transmission using the HARQ mechanism without complicated and unnecessary delay. Background technique FIG. 1 shows a retransmission protocol 100 used in a current WCDMA system (eg, WCDMA Release 5 / 6), in which high-speed data transmission is realized through high-speed downlink / uplink packet access (HSDPA / HSUPA) technology. In order to improve the reliability of data transmission, multiple retransmission loops are provided. The protocol 100 utilizes User Equipment (UE) 102 , NodeB 104 and Radio Network Controller (RNC) 106 . UE 102 includes: physical (PHY) layer 110 , medium access control (MAC) layer 112 and radio link control (RLC) layer 114 . NodeB 104 inclu...

AI Technical Summary

Problems solved by technology

Some packets may not be received correctly after multiple retransmission attempts in the RLC layer, or until the packet drop timer for the packet expires

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