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Method for controlling HSDPA flow based on feedback mode

A technology of flow control and feedback mode, applied in the field of WCDMA system, can solve the problems of unfavorable NodeB HSDPA scheduling speed NodeB buffer utilization efficiency, MAC-dPDU packet discarding, affecting communication system efficiency, etc., achieve good HSDPA service, reduce overflow , Improve the effect of HSDPA scheduling speed

Inactive Publication Date: 2007-04-04
ZTE CORP
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Problems solved by technology

Therefore, it can be seen that the existing NodeB side flow control is only triggered by the RNC sending a capability request control frame, and the NodeB itself cannot actively initiate, that is, the NodeB cannot monitor and manage the flow of the NodeB side, which will not be conducive to improving the HSDPA scheduling speed and The utilization efficiency of the NodeB buffer will also cause MAC-d PDU (MAC-d layer protocol data unit) packet buffer overflow and MAC-d PDU packet discarding, thus affecting the efficiency of the entire communication system

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  • Method for controlling HSDPA flow based on feedback mode
  • Method for controlling HSDPA flow based on feedback mode
  • Method for controlling HSDPA flow based on feedback mode

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[0023] In order to deeply understand the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] As shown in Figure 1, in the present invention, each MAC-D-QUE queue MAC-DPDU data packet accumulation buffer of NodeB side is regarded as a MAC-hs (the noun term on the version agreement above 3GPP R5, refers to media access Control-high-speed downlink packet access) buffer pool, let Vin be the input speed at which RNC sends HSDPA data to the MAC-D-QUE queue through the Iub port, and Vout be the MAC-D-QUE queue through U U The output speed (cell throughput rate) of sending HSDPA data to the user terminal, DiscardTime is the discarding time of the MAC-D PDU data packet in the MAC-D-QUE queue at the base station, H CURRENT For the current accumulation of the MAC-D PDU packets in the MAC-D-QUE queue, then the maximum height of the buffer pool (i.e. the maximum accumulation of the MAC-D...

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Abstract

The method comprises: NodeB calculates the desired stack and current stack of current MAC-D-QUE queue, and decides if the current stack is within the preset control range of initiation traffic; if yes, NodeB subtracts the current stack from the desired stack to get stack difference; according to the ratio of stack difference to the desired stack, and the output speed of transmitting HSDPA data from MAC-D-QUE queue to UU port, the NodeB calculates the input speed of transmitting data from RNC to MAC-D-QUE queue through Iub, and according to the input speed, calculates the relevant traffic control parameter; according to the parameter, forming the capacity allocation control frame that is sent to RNC; according to the capacity allocation control frame, RNC adjusts the HSDPA data transmission speed from Iub port to the base-station.

Description

technical field [0001] The invention relates to a WCDMA (Wideband Code Division Multiple Access) system, in particular to a feedback-based HSDPA (High Speed ​​Downlink Packet Access) flow control method in the WCDMA system. Background technique [0002] In the WCDMA system, in order to meet the needs of services such as downloading or streaming media, the system should provide higher transmission rates and less delay, so the air interface needs to be improved, so HSDPA technology is introduced, which can make The peak rate of a single cell is as high as 14Mbit / s. However, in HSDPA technology, flow control is a very critical link. The flow control of HSDPA should not only ensure that HSMAC (High Speed ​​Media Access Control Layer) has sufficient data scheduling, but also try to avoid the time spent on NodeB (base station) storage. The data packet is discarded due to too long. [0003] In existing HSDPA service processing, NodeB side flow control is generally as follows: Nod...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/30H04W28/10
Inventor 夏志远李永溢魏林辉
Owner ZTE CORP
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