Multiplex communications – Communication techniques for information carried in plural... – Adaptive
Reexamination Certificate
2005-04-12
2005-04-12
Sam, Phirin (Department: 2661)
Multiplex communications
Communication techniques for information carried in plural...
Adaptive
C370S340000, C370S341000, C370S522000, C355S117000, C713S151000
Reexamination Certificate
active
06879599
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.
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Galyas Peter
Jung Stefan Wilhelm
Westberg Lars
Sam Phirin
Telefonaktlebolaget LM Ericsson (publ)
Ton Anthony
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