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Method and apparatus for polling in a wireless communication system

A polling, wireless link control technology, applied in wireless communication, transmission system, digital transmission system, etc., can solve problems such as PDU uneconomical

Active Publication Date: 2015-03-11
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While retransmitting complete PDUs may have once been a satisfactory solution for modestly sized PDUs, retransmitting large PDUs may become uneconomical in newer systems

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  • Method and apparatus for polling in a wireless communication system
  • Method and apparatus for polling in a wireless communication system
  • Method and apparatus for polling in a wireless communication system

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Embodiment Construction

[0030] A data packet communication system employs a radio link control protocol for transmissions between a transmitter and a receiver. Radio Link Control provides Automatic Repeat Request (ARQ) featuring a lossless transmission service by requesting receiver status and retransmitting lost data. Requests for receiver status are referred to as polling, and describe an arrangement by which polling of receivers is accomplished with a reduced amount of potentially redundant transmitted data. When a polling event occurs, such as the transmitter's transmit buffer is emptied, the polling timer expires, the RLC protocol data unit (PDU) count threshold is reached, or the number of significant transmitted bytes threshold is reached, the transmitter sends a message to the receiver. The computer sends a polling command. The poll command can be smaller than any RLC PDU by segmenting or re-segmenting already sent PDUs into variable length PDUs for sending smaller amounts of data. Segmenta...

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Abstract

A data packet communication system employs radio link control (RLC) transmission between a transmitter and a receiver with an Automatic Repeat Request (ARQ) arrangement whereby polling of the receiver is accomplished with reduced amount of redundantly transmitted data, such as between an access node and terminal. Upon a polling event, such as emptying of a transmission buffer of the transmitter, expiration of a polling timer, or reaching a radio link control (RLC) protocol data units (PDUs) count threshold, the transmitter sends a polling command to the receiver. This polling command is smaller than any of the RLC PDUs by resegmenting to a variably sized PDU sending a reduced amount of data. With evolving communication standards tending toward larger PDUs, such as in excess of a kilobyte for HSPA+ (High-Speed Packet Access Evolution) and 3GPP LTE (Long Term Evolution), this inefficiency can be of increasing impact.

Description

[0001] Claiming Priority Based on 35 U.S.C. §119 [0002] This application for patent claims priority to U.S. Patent Application Serial No. 60 / 915,426, filed May 1, 2007, entitled "METHODS ANDAPPARATUS FOR EFFICIENT RLC POLLING," which application has been assigned to the assignee of this application, and therefore It is expressly incorporated into this application by reference. technical field [0003] The invention relates to the transmission of data packets from a transmitter to a receiver using a wireless access network for reliable acknowledgment communication. Background technique [0004] In the second layer specifications of the 3GPP (Third Generation Partnership Project) series of specifications, an Automatic Repeat Request (ARQ) mechanism is used as a feature of a part of the Radio Link Control (RLC) protocol. When the RLC creates a Protocol Data Unit (PDU), it submits the data to the lower layers and buffers the data until the receiver acknowledges receipt of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/16H04L1/18H04L12/805H04W28/06H04L47/36
CPCH04L47/365H04L47/10H04W28/06H04L1/1812H04L1/1685H04L47/33H04W74/06H04L1/1664H04W28/04H04L1/18
Inventor A·梅朗
Owner QUALCOMM INC