Method and system for interleaving of full rate channels suitable for half duplex operation and statistical multiplexing

• US 20010040883A1
• Filed: 12/15/2000
• Published: 11/15/2001
• Est. Priority Date: 01/07/2000
• Status: Active Grant

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Luo, Wei, Nanda, Sanjiv, Hernandez-Valencia, Enrique, Chang, Kirk K.
• Granted Patent: US 6,813,252 B2
• Time in Patent Office: Days
• US Class Current: 370/344
• CPC Class Codes: H04B 7/2656 for structure of frame, burst

Abstract

A time division multiplexed communications method and system in which time is divided into a number of frames and each frame is divided into N data bursts. The method and system further has a first multiplexer by which a half rate channel is formed as a series of bursts that occur periodically every N bursts once per frame, a second multiplexer in which a full rate channel is formed as two half rate channels on consecutive timeslots, and a transmitter transmitting the full rate channel from a first wireless station to a second wireless station. The full rate channel provided by two half rate channels on consecutive timeslots yields a significantly larger resource pool available for assignment of communication traffic. For full rate channels, the interleaving 0246/1357 method that is used by the system is just as good as the known 0123/4567 method when ideal frequency hopping is used, and the 0246/1357 method performs better when non-ideal frequency hopping or no frequency hopping is used.

Claims

1. A system for communicating using wireless time division multiplexed communications in which time is divided into a plurality of frames and each frame is divided into N data bursts, said system comprising:

means for defining a half rate channel as a series of bursts that occur periodically every N bursts once per frame;

means for defining a full rate channel as two consecutive half rate channels; and

means for transmitting said full rate channel from a first station to a second station.

2. The system of

claim 1

, wherein 0246/1357 interleaving is used for said full rate channel.

3. The system of

claim 1

, wherein 0246/1357 interleaving is used with non-ideal frequency hopping transmitting of said full rate channel because of the improved link performance provided thereby.

4. The system of

claim 1

, wherein 0246/1357 interleaving is used because of a lower delay to the start of a talkspurt of said half rate channels and hence said full rate channel than 0123/4567 interleaving.

5. The system of

claim 1

, wherein 0246/1357 interleaving is used because of larger resource pools for statistical multiplexing under half duplex constraints imposed by mobile stations provided for said full rate channel relative to 0123/4567 interleaving.

6. A system for communicating using wireless time division multiplexed communications in which time is divided into a plurality of frames and each frame is divided into N data bursts, said system comprising:

a first multiplexer defining a half rate channel as a series of bursts that occur periodically every N bursts once per frame;

a second multiplexer defining a full rate channel as two consecutive half rate channels; and

a transmitter transmitting said full rate channel from a first station to a second station.

7. The system of

claim 6

, wherein 0246/1357 interleaving is used for said full rate channel.

8. The system of

claim 6

, wherein 0246/1357 interleaving is used with non-ideal frequency hopping transmitting of said full rate channel because of the improved link performance provided thereby.

9. The system of

claim 6

, wherein 0246/1357 interleaving is used because of a lower delay to the start of a talkspurt of said half rate channels and hence said full rate channel than 0123/4567 interleaving.

10. The system of

claim 6

, wherein 0246/1357 interleaving is used because of larger resource pools for statistical multiplexing under half duplex constraints imposed by mobile stations provided for said full rate channel relative to 0123/4567 interleaving.

11. A method for communicating using wireless time division multiplexed communications in which time is divided into a plurality of frames and each frame is divided into N data bursts, said method comprising the steps of:

interleaving bursts using a 0246/1357 sequence to provide a plurality of half rate channels;

using two half rate channels on consecutive timeslots of said plurality of half rate channels to provide a full rate channel; and

transmitting said full rate channel bursts from a first station to a second station.

12. A method as set forth in

claim 11

wherein said transmitting said full rate channel from a first station to a second station step further includes using non-ideal frequency hopping during the transmitting.