Method and apparatus for transmitting/receiving voice over internet protocol packets with a user datagram protocol checksum in a mobile communication system
AssigneeSamsung Electronics Co., Ltd.
InventorSoeng-Hun Kim
Life of this patent
Estimating the term…
Abstract
A method and apparatus for transmitting/receiving a Voice over Internet Protocol (VoIP) packet on a radio link in a mobile communication system which provides a voice service over a packet network connected to the Internet. To transmit a VoIP packet, a VoIP packet comprising a user datagram protocol (UDP) checksum field is received, the UDP checksum field is eliminated from the received VoIP packet, a cyclic redundancy check (CRC) is added to the UDP checksum field-free VoIP packet, for error detection in the radio link, and the VoIP packet having the CRC is transmitted on the radio link.
Claims20
A method of transmitting a voice over Internet protocol (VoIP) packet on a radio link in a mobile communication system which provides a voice service over a packet network connected to the Internet, comprising the steps of:
- (1) receiving a VoIP packet comprising a user datagram protocol (UDP) checksum field;
- (2) eliminating the UDP checksum field from the received VoIP packet;
- and
- (3) adding a cyclic redundancy check (CRC) to the UDP checksum field-free VoIP packet, for error detection in the radio link.
A method of receiving a voice over Internet protocol (VoIP) packet on a radio link in a mobile communication system which provides a voice service over a packet network connected to the Internet, comprising the steps of:
- (a) receiving a VoIP packet without a user datagram protocol (UDP) checksum field on a radio link;
- and
- (b) recovering the UDP checksum field for the received VoIP packet.
An apparatus for transmitting a voice over Internet protocol (VoIP) packet on a radio link in a mobile communication system which provides a voice service over a packet network connected to the Internet, comprising:
- a checksum inserter for receiving a VoIP packet comprising a user datagram protocol (UDP) checksum field and replacing a UDP checksum in a UDP checksum field of the VoIP packet with a pseudo checksum preset between a transmitter and a receiver;
- a header compressor for compressing a header of the VoIP packet having the pseudo checksum;
- a checksum deleter for eliminating the UDP checksum field from the header-compressed VoIP packet;
- and
- a radio protocol (RP) transmitter for adding a cyclic redundancy check (CRC) to the UDP checksum field-free VoIP packet, for error detection in the radio link.
An apparatus for receiving a voice over Internet protocol (VoIP) packet on a radio link in a mobile communication system which provides a voice service over a packet network connected to the Internet, comprising:
- a radio protocol (RP) receiver for receiving a VoIP packet without a user datagram protocol (UDP) checksum field on a radio link;
- a checksum inserter for inserting a pseudo checksum preset between a transmitter and a receiver into the received VoIP packet;
- a header decompressor for decompressing a header of the VoIP packet with the pseudo checksum;
- and
- a checksum calculator for calculating a UDP checksum for the header-decompressed VoIP packet and replacing the pseudo checksum with the calculated UDP checksum.
Dependencies are inferred from the claim text.