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Method and transmitting unit for reducing a risk of transmission stalling

A technology of transmitting unit and receiving unit, applied in the field of reducing the risk of transmission stop and transmitting unit, can solve problems such as errors

Inactive Publication Date: 2010-12-08
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this does not solve the technical problem that a block that may be the subject of another retransmission is no longer available for retransmission because the transmitter has advanced its window and removed from the buffer
[0013] Another problem that can exist in existing transport protocols is if an outstanding block other than the oldest outstanding block is indicated as correct, but this is false for the same reason as previously stated

Method used

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  • Method and transmitting unit for reducing a risk of transmission stalling
  • Method and transmitting unit for reducing a risk of transmission stalling
  • Method and transmitting unit for reducing a risk of transmission stalling

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Embodiment Construction

[0024] figure 1 A communication system is described comprising a Radio Access Network (RAN), such as a GSM Edge Radio Access Network (GERAN) architecture, comprising at least one Base Transceiver Station (BTS) 15( figure 1 Two are shown in ), the controller unit is eg a Radio Network Controller Node (RNC) or a Base Station Controller (BSC) 10 . The RAN is connected to a core network (CN) 12 . The RAN and CN 12 provide communication and control over a plurality of user equipments (UEs) 18 each using a downlink (DL) channel 16 and an uplink (UL) channel 17 . For the sake of clarity, only one upstream channel 17 and one downstream channel 16 are marked. On the downlink channel 16 the RBS 15 transmits data blocks to each user equipment 18 . On the upstream channel 17 the user equipment 18 transmits data blocks to the BTS 15 . Preferably, the data blocks are sent using the Radio Link Control (RLC) protocol. Each RLC data block sent is assigned a Block Sequence Number (BSN). T...

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Abstract

The present invention relates to a method and a transmitting unit for reducing a risk of transmission stalling between a transmitting unit and a receiving unit in a communication network system comprising said transmitting unit arranged to transmit data blocks to said receiving unit. Each data block comprises a block sequence number and transmitted data blocks are stored in a transmission buffer. A transmission buffer window is arranged to control the flow of retransmission of said transmitted data blocks. When the block sequence number has been acknowledged in a piggybacked acknowledgement / negative acknowledgement field, it is only set as acknowledged upon receipt of a packet uplink acknowledgement / negative acknowledgement message or a packet downlink acknowledgement / negative acknowledgement message comprising an acknowledgement for said block sequence number.

Description

technical field [0001] The invention relates to a method and a transmitting unit in a communication network system, in particular to a transmitting unit and a method for reducing the risk of transmission stoppages. Background technique [0002] Data communication protocols designed to provide reliable data transmission typically use error control protocols. Error control protocols are designed to detect errors in a received data block and signal the status of the received data block from the receiver to the transmitter via a feedback channel, indicating whether the received data block was received correctly or incorrectly. This causes the transmitter to retransmit the erroneous data block. [0003] If a data block is not received correctly, the data block is non-acknowledged (NACK), while correctly received data blocks are acknowledged (ACK). Typically, each data block is associated with a sequence number unique enough to track individual blocks. If the receiver indicates...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18
CPCH04L49/90H04L1/187H04L1/1664H04L47/10H04L1/1858
Inventor 哈肯·泊松保罗·施利娃-伯特林
Owner TELEFON AB LM ERICSSON (PUBL)