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Method for transmission of messages split over several packets

A message and transmission system technology, applied in transmission systems, digital transmission systems, time-division multiplexing selection devices, etc., can solve problems such as CPCS packet loss

Inactive Publication Date: 2006-08-02
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Partially received CPCS packets may be lost if the DLC layer discards some PDUs

Method used

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  • Method for transmission of messages split over several packets
  • Method for transmission of messages split over several packets
  • Method for transmission of messages split over several packets

Examples

Experimental program
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Embodiment Construction

[0018] The present invention relates to Hiperlan type 2 networks, but is not limited to this particular environment. Information related to Hiperlan 2 networks can be found in the corresponding ETSI documents, in particular the following documents:

[0019] (a) V0.m (1999-12) Broadband Radio Access Network (BRAN); HIPERLAN Type 2; Data Link Control (DLC) Layer Part 1: Basic Data Transmission Features

[0020] (b) V0.e (2000-01) Broadband Radio Access Network (BRAN); HIPERLAN Type 2 Functional Description, Data Link Control (DLC) Layer, Section Four parts, extension of the home environment

[0021] (c) DTS (Data Transfer System) / BRAN-0024004-1V0.g (1999-11) Broadband Radio Access Network (BRAN); HIPERLAN Type 2; Packet-based Convergence Layer; Part 1: Generic Part

[0022] Document (c) specifically refers to the SAR and CPCS layers.

[0023] According to the above document (c), the CPCS layer sends a message (called CPCS SDU) to the SAR layer. The SAR layer divides CPCS p...

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Abstract

Concerns a method for processing received packets in a transmission system comprising an emitter device and a receiver device, a message from the emitter being split into packets of fixed length for transmission to the receiver, an indication of message length N being transmitted with at least one packet relating to the message, characterized by the steps of: receiving packets and storing packets in memory according to a sequence number order of the packets; upon reception of an end-of-message packet, determining the number of packets necessary to contain the message based on the length indication; retrieving the determined number of packets in memory, backtracking from the packet having greatest sequence number and using these retrieved packets to reconstitute the message; discarding other packets in memory.

Description

technical field [0001] The invention relates to a method of transmitting messages separated into several packets. This approach is particularly suitable for devices in a wireless Hiperlan 2 environment. Background technique [0002] Figure 4 shows the protocol stack of a transmitter or receiver node in a Hiperlan 2 wireless network. From bottom to top, this stack includes the Physical Layer ('PHY'), Data Link Control Layer ('DLC'), Convergence Layer ('CL'), followed by higher layers. The convergence layer CL can be of several types, in particular cell-based or packet-based. The packet-based convergence layer includes a number of Service Specific Convergence Sublayers ('SSCS'). Examples of SSCS layers presently specified or in the specification relate to Ethernet or IEEE 1394 environments. Below this specific sublayer, there is a Common Part Convergence sublayer ('CPCS'), and below it a Segmentation and Reassembly sublayer ('SAR'). [0003] More specifically, this applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/04H04L12/56H04L12/54H04L12/70H04L29/02H04L29/08
CPCH04Q11/0478H04L12/56H04L2012/5652H04L51/21
Inventor 雷诺·多尔帕特里克·方丹卢多维克·让娜
Owner THOMSON LICENSING SA
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