Method for information interaction between base station and user terminal

A user terminal and information interaction technology, applied in the field of information interaction, can solve the problems of data packet retransmission, waste of underlying transmission bandwidth, and reduce the efficiency of underlying transmission, so as to avoid invalid delivery, save underlying bandwidth resources, and improve underlying transmission efficiency Effect

Active Publication Date: 2009-02-04
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, the existing technology has caused unnecessary retransmission of some data packets on the base station side, which in turn causes a waste of underlying transmission bandwidth and reduces the underlying transmission efficiency

Method used

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  • Method for information interaction between base station and user terminal
  • Method for information interaction between base station and user terminal
  • Method for information interaction between base station and user terminal

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0026] The core idea of ​​the present invention is: the base station side refers to the behavior of the user terminal reordering entity in the process of sending data packets, that is, uses the T1 parameter to predict the time length for the data packets in the sending window to reach the user terminal buffer, and uses the The sum of the lengths of the data packets received from the user terminal ACK is used to predict the occupancy rate of the user terminal cache. The user terminal discards, and then dynamically adjusts the sending window of the base station to prevent the base station from sending data packets that have expired for the user terminal, or dynamically adjusts the sending speed of the base station data packet according to the occupancy rate of the current user terminal cache.

[0027] The receiving mechanism of the user terminal for the data packet in the process of information interaction with the base station is: the base station sends the data packet sequentia...

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Abstract

This invention relates to a method for interacting information between base stations and user terminals including: a base station judges if it has received a confirmation message that data packets in a sending window are obtained by a user terminal correctly, if not, the sending window keeps unchanged, if so, it monitors by a timer the existing time length of the data packet in the window with the largest sending number in the data packets and judges if the timer is over the time, if so, it exchanges the bottom of the sending window to a first data packet after that with the largest sequence number, otherwise, the window is unchanged, finally, the station sends data packets not receiving the confirmation message.

Description

technical field [0001] The invention relates to an information interaction method between a base station and a user terminal in a WCDMA network, in particular to an interaction method involving information retransmission. Background technique [0002] In the WCDMA system, a high-speed downlink packet access shared channel (HSDPA, highspeed downlink packet access) is introduced, and the channel uses adaptive modulation and coding to send information. The adaptive modulation and coding means that the modulation method and coding redundancy used by the channel can be dynamically adjusted according to the channel environment. When the channel condition is good, a high-order modulation method and a low-redundancy coding method are used to improve Spectrum efficiency and code resource utilization; if the channel condition is not good, low-order modulation and high-redundancy coding are used when sending information. [0003] In order to compensate for the error of adaptive modula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L1/00H04Q7/20
Inventor 胡军
Owner HUAWEI TECH CO LTD
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