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Processing method of LLC (logic link control) frames and base station subsystem

A technology of base station subsystem and processing method, which is applied in the field of LLC frame processing method and base station subsystem, can solve the problem that the upper layer data cannot be composed, and achieve the effect of ensuring the transmission sequence

Active Publication Date: 2014-12-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a processing scheme for LLC frames, to at least solve the problem that the SNDCP layer cannot form upper-layer data when the unacknowledged mode disorder in the above-mentioned related art exceeds a certain range

Method used

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  • Processing method of LLC (logic link control) frames and base station subsystem
  • Processing method of LLC (logic link control) frames and base station subsystem
  • Processing method of LLC (logic link control) frames and base station subsystem

Examples

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Embodiment 1

[0023] An embodiment of the present invention provides a method for processing an LLC frame, figure 2 It is a flowchart of a processing method of an LLC frame according to an embodiment of the present invention, such as figure 2 As shown, the method includes:

[0024] Step S202, after the BSS receives the LLC frame under a mobile station (Mobile Station, referred to as MS), obtains the LLC frame sequence number and the Service Access Point Identifier (Service Access Point Identifier, referred to as SAPI) from the LLC frame;

[0025] Step S204, the BSS sorts the received LLC frames by using the serial number and the SAPI, and sends the sorted LLC frames to the terminal in sequence.

[0026] In this embodiment, the BSS sorts the out-of-sequence LLC frames in the unacknowledged mode, and sends the sorted LLC frames to the terminal. That is to say, the LLC functional entity part in the GPRS protocol stack is moved down to the BSS, so that the LLC functional entity that was ori...

Embodiment 2

[0032] image 3 is a schematic diagram of the processing of the LLC frame by the BSS according to an embodiment of the present invention, such as image 3As shown, the LLC layer data is decoded on the BSS, and then the SAPI and the corresponding LLC frame serial number are obtained, and the transmission disorder of the Gb port is detected according to the change of the serial number, and the received LLC frames are re-sorted according to the serial number and passed The air interface is issued to the terminal (mobile phone) in sequence. In this way, the original practice of sequentially storing LLC frames is changed, thereby maintaining an ordered LLC frame buffer sending queue.

[0033] In the implementation process of this embodiment, little changes are made to the original system, mainly to implement some LLC frame functions on the BSS, and realize the decoding and sorting of the LLC frames.

[0034] Figure 4 is a schematic diagram of LLC frame insertion according to an...

Embodiment 3

[0041] This embodiment describes the sorting process of LLC frames. It should be noted that only the sorting of UI frames will be described below, and non-UI frames will be skipped. Figure 5 is a schematic diagram of a processing method of an LLC frame according to Embodiment 3 of the present invention, such as Figure 5 As shown, the method includes:

[0042] In step S501, the BSS obtains the LLC frame at the end of the queue to be sent as the current LLC frame.

[0043] Step S502, judging whether the SAPI of the current LLC frame is the same as the SAPI of the LLC frame to be inserted, if yes, go to step S503, otherwise go to step S508.

[0044] Step S503, judging whether the serial number of the LLC frame to be inserted is greater than the LLC frame in the current queue, if yes, go to step S504, otherwise, go to step S507.

[0045] Step S504, judging whether the first LLC frame is valid, wherein the first LLC frame is the first LLC frame found in the LLC frame buffer que...

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Abstract

A method for processing Logical Link Control (LLC) frames and a base station subsystem (BBS) are provided in the present invention. The method includes: after receiving LLC frames, a BBS obtains LLC frame sequence numbers and Servive Access Point Identifiers (SAPIs) from the LLC frames; the BBS sequences the received LLC frames using the frame sequence numbers and the SAPIs and orderly transmits the sequenced LLC frames to a terminal. The present invention achieves the effects of guaranteeing the transmission sequence of the LLC frames and correct package in a code reception end.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method for processing an LLC frame and a base station subsystem. Background technique [0002] With the evolution of the Internet Protocol (IP) of the Global System for Mobile communication (GSM), after the introduction of IP transmission at the Gb interface, due to the non-connectivity of the IP technology itself, the logic of the Gb interface The sequential transmission of the link control (Logical Link Control, LLC for short) frame cannot be guaranteed either. From the perspective of the general packet radio service (General Packet Radio Service, referred to as GPRS) user plane protocol stack, the base station subsystem (Base Station Subsystem, referred to as BSS) is transparent to the transmission of the LLC layer. In this way, a terminal such as a mobile phone receives The order of LLC frames will not be guaranteed. [0003] figure 1 is a schematic diagram of the user...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04B7/26H04W80/02
CPCH04W88/08H04W72/12
Inventor 谈虎吕洪涛李姝
Owner ZTE CORP
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