Iub interface flow control method and Iub interface flow control device

Abstract

The invention discloses an Iub interface flow control method and an Iub interface flow control device. The Iub interface flow control method includes receiving capacity distribution requests transmitted by an RNC (radio network controller) after a channel is built and distributing bandwidth; executing the following steps when data and residual cache data size transmitted by the RNC each time, including determining whether a flow control keeping identification is available; releasing the distributed bandwidth and setting the flow control keeping identification to be available in case that the flow control keeping identification is unavailable and the residual caches are zero; adjusting the distributed bandwidth one time at set period intervals and instructing the distributed bandwidth to the RNC in case that the flow control keeping identification is unavailable and the residual caches are nonzero; distributing bandwidth for the RNC according to the residual cache data size and setting the flow control keeping identification to be unavailable in case that the flow control keeping identification is available; transmitting capacity distribution requests by the RNC when the channel is built and cache data are transmitted, and then transmitting cache data and carrying residual data according to stored latest distributed bandwidth when the cache data exist.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an Iub port flow control method and device. Background technique [0002] For the data transmission control of the Iub port of the HSDPA (High Speed ​​Downlink Packet Access) service in the TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access) system, 3GPP (The 3rd Generation Partnership Project, the third generation partnership project) TS25.435 agreement defines a simple flow control method, such as figure 1 As shown, the RNC (Radio Network Controller, radio network controller) requests the base station (NodeB, NB) for data transmission bandwidth through a capacity allocation request, and carries the data status of the RNC side; figure 2 As shown, the base station replies the capacity allocation bandwidth to the RNC through the capacity allocation response, and notifies the RNC to start or st...

AI Technical Summary

Problems solved by technology

[0012] Question 1) According to the protocol description, every intermittent data will be accompanied by a signaling interaction, which increases the transmission delay of downlink data;

[0013] Question 2) On the basis of question 1), after there is no cached data on the RNC side, the base station will release the occupied bandwidth, but the short-term interruption will lead to the reallocation of the bandwidth, resulting in a short-term rate drop;

[0014] Question 3) Since the effect of flow control on the base station side is directly related to the user's HSDPA download rate experience, in fact, there is a certain delay between the transmission capacity of the base station side and the data received by the RNC, so the intermittent transmission of HSDPA service data In many cases, the frequent signaling interaction delay will have a certain impact on the HSDPA download rate, that is, there will be glitches in the downlink download rate, which will affect the user experience;

[0015] Question 4) According to the protocol description, the right to adjust system bandwidth allocation lies in the amount of cached data when the RNC requests capacity allocation. If the data is continuously cached in the future, the bandwidth occupied by the data queue on the base station side will remain unchanged regardless of the amount of data. Since the total bandwidth is calculated based on physical resources Therefore, physical channel resources are wasted in disguise

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