Harq reordering method for wcdma enhanced uplink dedicated channel

• US 20070042782A1
• Filed: 02/17/2004
• Published: 02/22/2007
• Est. Priority Date: 02/17/2003
• Status: Active Grant

• Current Assignee: Beijing Samsung Telecom R&D Center (Samsung Electronics Co. Ltd.), Samsung Electronics Co. Ltd.
• Original Assignee: Beijing Samsung Telecom R&D Center (Samsung Electronics Co. Ltd.), Samsung Electronics Co. Ltd.
• Inventors: Lee, Ju-Ho, Lee, Kook-Heui, Zhao, Jing, Sun, Chunying, Kim, Jeong-Gon, Lee, Hyeon-Woo, Zhang, Shuwei
• Granted Patent: US 8,285,330 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1841 Resequencing
• CPC Class Codes: H04L 1/1845 Combining techniques, e.g. code combining
• CPC Class Codes: H04L 1/1851 using multiple timers
• CPC Class Codes: H04L 1/188 Time-out mechanisms

Abstract

A method for HARQ reordering in Enhanced Uplink Dedicated Channel of WCDMA system includes following steps: locating the soft combination buffer in the Node B and the reordering buffer in the SRNC; locating the HARQ entity in the Node B; locating the reordering queue distribution entity, the reordering entity and the disassembly entity in the SRNC. This invention adopts the separation technology of the soft combination buffer and the reordering buffer, the separation model can not only ensure the diversity gain, but also reduce the receiving delay and save the buffer space. Three mechanisms (timer mechanism, window mechanism and SBI mechanism) are proposed to prevent the blocking of the reordering buffer, which degrades the blocking to the least level, improves the receiving efficiency and the system performance. Aiming at the SBI mechanism, the invention proposes the new DCH data frame structure on the Iub interface and the Iur interface.

Claims

1. A method for Hybrid Automatic repeat Request reordering in Enhanced Uplink Dedicated Channel of Wideband Code Division Multiple Access system, comprising step of:

locating a soft combination buffer in a Node B and a reordering buffer in a serving radio network controller;

locating a hybrid automatic repeat request entity in the Node B; and

locating a reordering queue distribution entity, a reordering entity and a disassembly entity in the serving radio network controller.

2. The method according to claim 1, wherein setting a transmission timer at a user equipment to control the retransmission time and a release timer at the serving radio network controller to control the waiting time.

3. The method according to claim 1, wherein setting a transmission window at the user equipment to prevent the transmission sequence number confusion at the receiver and a receiving window at the serving radio network controller to control the sliding of the receiving window.

4. The method according to claim 3, wherein the maximum value of said transmission window is a half of the transmission sequence number length range.

5. The method according to claim 3, wherein the maximum value of said receiving window is a half of the transmission sequence number length range.

6. The method according to claim 1, wherein sending a buffer state indication bit accompanied by said Node B at the same time of transmitting a medium access control-enhanced uplink protocol data unit;

and

detecting the buffer state indication bit by the serving radio network controller at the same time of receiving the medium access control-enhanced uplink protocol data unit and deciding whether to clear the buffer according to the soft combination state indicating.

7. The method according to claim 6, wherein the soft combination buffer state indicating has two states:

state 1 indicates that all processes in the soft combination buffer are empty, i.e. no data are needed to be retransmitted; and

other cases belong to the state 0.

8. The method according to claim 6, wherein the soft combination buffer state indication bit is added for each transfer block and the data frame structure on an Iub interface is the same as that on an Iur interface.

9. A method for the HARQ reordering in Uplink Channel of telecommunication system includes plurality of Node Bs having soft combine buffers respectively and a RNC having reordering buffer, control each of the Node Bs comprising following steps:

receiving, at the Node Bs, packet data from mobile terminal and storing the received data in the soft combining buffer respectively;

decoding the received data with channel decoder in each Node Bs;

transmitting an Acknowledge or Non-acknowledge information to the mobile terminal;

transmitting, at the Node Bs, the decoded data to the RNC;

buffering each decoded data in the reordering buffer; and

reordering the decoded data in the RNC.

10. A method for the HARQ reordering in Uplink Channel of telecommunication system includes Node B having soft combining buffer and a RNC having reordering buffer, comprising following steps:

receiving, at the Node B, packet data from mobile terminal and storing the received data in the soft combining buffer;

decoding the received data with channel decoder in Node B;

transmitting an Acknowledge or Non-acknowledge information to the mobile terminal;

transmitting, at the Node B, the decoded data to the RNC;

buffering the decoded data in the reordering buffer; and

reordering the decoded data in the RNC.

11. A telecommunication system having hybrid automatic repeat request (HARQ) function, the system comprising;

plurality of Node Bs, at least one of the Node Bs communicates with a terminal, for receiving packet data from a mobile terminal, decoding the packet data and transmitting acknowledgement signal or non-acknowledgement signal to the terminal according to the decoding result;

the mobile terminal for transmitting the packet data and repeating transmission of the packet data when the terminal receive the non-acknowledgement signal; and

a RNC for controlling the Node Bs, receiving decoded data from the Node B, reordering the packet data according to a packet sequence of the packet data;

wherein, the Node B having soft combining buffer buffering the packet data and combining first transmission packet data and second transmission packet data when the Node B receive the packet data again.