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Time adjusting method for wireless access network and core network interface user-plane

A technology of core network interface and wireless access network, which is applied in the direction of network interconnection, data exchange through path configuration, electrical components, etc., which can solve the problem of unspecified SRNC detection trigger time adjustment, etc., and achieve the effect of small buffer delay

Inactive Publication Date: 2008-06-04
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] It can be seen that the agreement does not stipulate how the SRNC detects the trigger time adjustment

Method used

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  • Time adjusting method for wireless access network and core network interface user-plane
  • Time adjusting method for wireless access network and core network interface user-plane
  • Time adjusting method for wireless access network and core network interface user-plane

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Embodiment Construction

[0043] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0044] figure 1It is a functional model diagram of the Iu UP protocol layer in the supporting mode of CN and UTRAN (radio access network, including RNC) connected through the Iu interface. As shown in the figure, the Iu UP protocol layers on both CN and RNC have the following three types of functions:

[0045] 1) Frame Handler function;

[0046] 2) Procedure Control functions (Procedure Control functions);

[0047] 3) Functions for non-access stratum (NAS: Non Access Stratum) data streams (Non AccessStratum Data Streams specific functions);

[0048] The time adjustment function involved in the present invention belongs to the process control function, and is used to control the timing of the downlink data on the Iu interface to the RNC.

[0049] figure 2 , image 3 Indicates the time adjustment process between SRNC and CN, where PT(...

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Abstract

The invention discloses a time adjustment method of wireless access net and core net interface user plane. At first the SRNC confirms a reference frame, records the frame number of the current received data frame and the arrival instant; the perfect arrival instant of the current frame is formed that difference of the current frame and reference frame is multiplied the clocking interval at Iu opening, plus the arrival instant of the reference frame; the time difference that the perfect arrival instant is subtracted from the arrival instant of the current frame is judged whether it is in the given range, if it is, the time will no be adjusted, the reference frame will be renewed, then the next frame will be processed continually; otherwise, the time adjustment process between the core nets will be triggered, moreover, after timing exactly in consecutive frame the last frame is used as the reference frame to gain the high precision reference frame. The invention uses a simple method to realize the Iu UP time adjustment function stipulated in the protocol, effectively control the time sequence from the down link data at the Iu interface to SRNC, and make the buffer time delay reach the minimum in the SRNC.

Description

technical field [0001] The present invention relates to the interface (defined as Iu mouth) of radio network controller (RNC, Radio Network Controller) and core network (CN: Core Network) in WCDMA system, particularly relate to this interface service radio network controller (SRNC: Sever Radio Network Controller , indicating the method for adjusting the user plane time on the RNC) side where the service exists. Background technique [0002] In the WCDMA system, the Iu port is a standard interface connecting the RNC and the CN, and the Iu port user plane (Iu UP, Iu User Plane) is the user data transmission protocol of the Iu port, which is mainly used to realize the transfer of user data between the CN and the RNC. transmission. The user plane of the Iu interface has two operation modes: a transparent mode (TrM: Transparent Mode) and a support mode (SMpSDU: Support Mode for predefined SDUsize) that predefines the size of the service data unit (SDU: Service Data Unit). [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/02H04L12/46
Inventor 吕应权
Owner ZTE CORP