Mapping of transcoder/rate adaptor unit protocols onto user datagram protocols
US6879599B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2000 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Nov 8, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W92/14
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A telecommunications system and method are disclosed for mapping a Transcoder/Rate Adaptor (TRAU) protocol onto a User Datagram Protocol (UDP) for use in an Internet Protocol (IP) based Base Station System (BSS) architecture. All in-band control bits in the TRAU protocol are not relevant when using the UDP protocol. Therefore, when speech information is mapped onto a UDP datagram for transfer to a Channel Codec Unit(CCU) in a Base Transceiver Station (BTS), some of the information normally transferred between a CCU and the TRAU can be removed. For example, a Time Alignment command included in some of frame types is not needed, and should be removed. In addition, bits relating to a frame structure, such as TRAU synchronization bits, tail bits and spare control bits, should be removed from all frame types. Furthermore, a new control bit that contains a sequence number must be added to handle reordering of a packet data stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.