Apparatus and Method for Efficiently Processing Voice Packet Data in Mobile Communication System Providing Voice Service Using Packet Network

• US 20080031253A1
• Filed: 05/13/2005
• Published: 02/07/2008
• Est. Priority Date: 05/19/2004
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Van Lieshout, Gert-Jan, Kim, Soeng-Hun
• Application Number:
  US11/597,239
• Publication Number:
  US 20080031253A1
• Time in Patent Office: Days
• US Class Current: 370/393
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 1/0075 Transmission of coding parameters to receiver H04L1/0023 takes precedence
• CPC Class Codes: H04M 2207/18 wireless networks
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42

Abstract

Disclosed are apparatus and method for efficiently processing voice packet data in a mobile communication system providing voice service using a packet network. The method includes: receiving a voice packet from an upper layer and generating a header including information about voice packet type and information for checking of voice packet error; confirming a data field of the voice packet based on the packet type and determining an error detection range; reconstructing a voice packet including the error detection range and the header and transferring the reconstructed voice packet to a lower layer. The apparatus and method can perform decoding with proper CODEC for an erroneous voice packet, thereby improving the quality of voice communication.

Claims

1. A transmission method for efficiently processing a voice packet in a mobile communication system providing a voice service through a packet network, the transmission method comprising the steps of:

receiving by a radio link control layer a voice packet for transmission from an upper layer and generating a header including information representing a type of the received voice packet and information used for checking errors in the header of the voice packet;

confirming a voice data part of the voice packet using the information representing the type and determining a coverage used for performing error detection with respect to the voice packet through the confirmed voice data part; and

reconstructing a voice packet including the header and the voice data and transmitting the reconstructed voice packet to a lower layer through a wireless channel, the header including the determined error detection range.

2. The transmission method as claimed in claim 1, wherein the radio link control layer receives from the upper layer information representing if the voice packet is voice data or silent descriptor data and assigns the information to a type field of the generated header.

3. The transmission method as claimed in claim 1, wherein the radio link control layer receives the voice packet for transmission from the upper layer and generates the header by further inserting information representing a sequence number of the voice packet.

4. The transmission method as claimed in claim 1, wherein the radio link control layer distinguishes the voice data part and the header part of the voice packet using the information assigned to the type field and assigns a value used for performing error detection with respect to the header part as information used for checking errors of the voice packet to be delivered to the lower layer.

5. The transmission method as claimed in claim 1, wherein, in the step of determining the coverage used for performing the error detection, when the received voice packet is concatenated with a previous voice packet which is not transmitted, the coverage is determined only for the received voice packet.

6. The transmission method as claimed in claim 1, wherein, in the step of generating the header, the header is generated by inserting an indicator representing that the voice packet is concatenated and transmitted.

8. The reception method as claimed in claim 1, wherein, in the step of determining the error detection range, when the voice packet of the received data is concatenated with a voice packet of previous data (which are not transmitted), the error detection range is determined only for the voice packet of the received data.

7. A reception method for efficiently processing a voice packet in a mobile communication system providing a voice service through a packet network, the reception method comprising the steps of:

receiving by a radio link control layer data from a lower layer and reconstructing a voice packet by using a header including information representing a packet type of the data and information used for checking an error with respect to the header of the data;

extracting the information used in order to check an error in the header from the voice packet reconstructed by using the header;

confirming a voice data part of the voice packet using the information representing the packet type and determining an error detection range required for determining if an error exists in a part excluding the confirmed voice data part; and

determining if an error exists in the voice packet by comparing the error detection range with the information used for checking an error.

9. A transmission apparatus for a radio link control which efficiently processes a voice packet in a mobile communication system providing a voice service through a packet network, the transmission apparatus comprises:

a buffer for receiving information representing a type of a voice packet and the voice packet from an upper layer and storing the information and the voice packet;

a division/concatenation module for performing division or concatenation with respect to the voice packet stored in the buffer and previously-received another voice packet such that the voice packet and another voice packet have sizes suitable for transmission through a wireless channel;

a header generating module for generating a header including information representing a sequence number used for distinguishing the voice packet and another voice packet, information representing a length of the voice packet, and information representing if errors exist in the header of the voice packet; and

an error information coverage determining module for distinguishing a voice data part and a header part of the voice packet using information representing the type and determining an error occurring range of the voice packet by assigning a value used for performing error detection for the header part as information used for checking errors with respect to the voice packet.

10. The transmission apparatus as claimed in claim 9, wherein, in the header generating module, an indicator representing that the received voice packet is concatenated and transmitted is further included.

11. A reception apparatus for radio link control which efficiently processes a voice packet in a mobile communication system providing a voice service through a packet network, the reception apparatus comprising:

a buffer for receiving data from a lower layer and storing the data;

a header extracting module for extracting information representing a type of the data and information representing if errors exist in a header of the data from the received data;

an error detection range calculating module for determining a voice data part of the data using the information representing the type and determining an error detection range used for determining if errors exist in a part excluding the determined voice data part; and

an error information comparison module for determining if errors exist in the header by comparing an error occurring range predetermined based on the type information with the information representing if errors exist in the header of the data.