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System and method for prioritization of retransmission of protocol data units to assist radio-link-control retransmission

A protocol data unit and retransmission technology, applied in the field of wireless communication, can solve the problems of aggravated transmission waiting time and data buffering and temporary storage

Inactive Publication Date: 2008-04-30
INTERDIGITAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Again, it should be noted that this example only reflects 11 PDUs. However, under normal operation, hundreds of PDUs may be scheduled before retransmitting data PDUs, which will aggravate the problem of transmission latency and data buffering.

Method used

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  • System and method for prioritization of retransmission of protocol data units to assist radio-link-control retransmission
  • System and method for prioritization of retransmission of protocol data units to assist radio-link-control retransmission
  • System and method for prioritization of retransmission of protocol data units to assist radio-link-control retransmission

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Experimental program
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Embodiment Construction

[0033] Preferred embodiments are described below with reference to the drawings, wherein like reference numbers refer to like components throughout.

[0034] In describing the present invention, reference may be made to the terms "buffer" and "memory". The terms are intended to be equivalent and are used to denote a number of data blocks or PDUs in a continuous queue.

[0035] In order to reduce the latency of an RLC layer retransmission, the present invention prioritizes the retransmission of a PDU over a subsequent PDU in the buffer of an intermediate node such as a Node B.

[0036] In the downlink direction (data transmission from the server RNC (SRNC) to the UE), one source of retransmission latency arises in applications where buffers are located in the UTRAN but outside the SRNC. For example, in many applications, RNC RLC is the one that transmits PDUs to MAC-d in RNC, which can generate a MAC-d PDU and transmits to CRNC, and then to Node B (note that after a UE has not...

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Abstract

A medium access control (MAC) architecture reduces transmission latency for data block retransmissions. A plurality of data blocks are received and temporarily stored in a first memory (e.g., queue, buffer). The plurality of data blocks are then transmitted. A determination is made as to whether each of the transmitted data blocks was received successfully or needs to be retransmitted because the data block was not received successfully. Each of the transmitted data blocks that needs to be retransmitted is marked and temporarily stored in a second memory having a higher priority than the first memory. The marked data blocks are retransmitted before data blocks stored in the first memory location.

Description

technical field [0001] The present invention relates to the category of wireless communication. More specifically, the present invention relates to a system and method for prioritizing protocol data unit (PDU) retransmission to assist radio link control (RLC) layer retransmission. Background technique [0002] In the third generation (3G) mobile phone system of frequency division duplex (FDD) and time division duplex (TDD), the radio link control (RLC) layer has a retransmission mechanism in the confirmation mode to achieve high reliability endpoints Data transfers to endpoints. The RLC layer is an equivalent entity in both the radio network controller (RNC) and the user terminal equipment (UE). [0003] figure 1 is a block diagram showing a UMTS Universal Terrestrial Radio Access Network (UTRAN) MAC-hs layer architecture, and figure 2 In is a block diagram showing the user terminal equipment (UE) MAC-h architecture. Co-pending U.S. Patent Application No. 10 / 270,822 as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18G08C25/02H04L29/06H04B7/26H04L1/16H04W4/00H04W28/04H04W72/10
CPCH04L1/1874H04L1/16H04L1/1887H04L1/1812H04W28/0242H04W72/56H04L1/08H04W24/02H04L1/189H04W24/10
Inventor 史蒂芬·E·泰利赵怡如詹姆斯·M·米勒尔
Owner INTERDIGITAL TECH CORP