Multiplexing variable-rate data with data services

• US 20030202475A1
• Filed: 07/02/2002
• Published: 10/30/2003
• Est. Priority Date: 04/25/2002
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Kulkarni, Harshwardhan, Nookala, Sriram Nagesh, Chen, Qingxin
• Application Number:
  US10/188,603
• Publication Number:
  US 20030202475A1
• Time in Patent Office: Days
• US Class Current: 370/235
• CPC Class Codes: H04B 2201/70703 using multiple or variable rates
• CPC Class Codes: H04J 3/1688 the demands of the users being taken into account after redundancy removal, e.g. by predictive coding, by variable sampling reducing bandwidth of signals in general H04B1/66; in PCM-systems H04B14/046; removal of redundancy in telegraph communication H03M7/30
• CPC Class Codes: H04L 47/245 using preemption
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 72/569 of the traffic information

Abstract

Techniques for multiplexing variable-rate data with data services on a shared channel are disclosed. In one aspect, data from data services is prioritized. High priority data awaiting transmission may result in a dim command being issued to reduce the rate of the variable-rate data, thus making room for the data services data. Lower priority data from data services may wait for the next available space, without reducing the rate of the variable-rate data. In another aspect, data services data is categorized into three or more priority levels. High priority data can preempt variable-rate data. Medium priority data may result in a dim command reducing the variable-rate data. Low priority data may wait for the next available space, without reducing the rate of the variable-rate data. Various other aspects are also presented. These aspects have the benefit of allowing variable-rate and data services data to be multiplexed on a shared channel, while balancing the quality of the variable-rate data signal and maintaining data services when the variable-rate data is at a high rate.

Claims

1. An apparatus comprising:

a multiplex sublayer module for receiving a first variable-rate data stream and a second data stream, forming a third data stream from the first and second data streams, and generating a dim command to reduce the rate of the first variable-rate data stream to make room for a portion of the second data stream in the third data stream.

2. The apparatus of claim 1, wherein the dim command is generated whenever the first variable-rate data stream is at full rate and data from the second data stream is waiting for transmission.

3. The apparatus of claim 1, wherein:

the second data stream comprises higher and lower priority data; and

the dim command is generated whenever the first variable-rate data stream is at full rate and higher priority data from the second data stream is waiting for transmission.

4. The apparatus of claim 1, wherein:

the second data stream comprises higher and lower priority data;

variable-rate data is discarded when higher priority data from the second data stream is waiting for transmission and there is not space in the third data stream, allowing for immediate transmission of the higher priority data; and

the dim command is generated whenever the first variable-rate data stream is at full rate and lower priority data from the second data stream is waiting for transmission.

5. The apparatus of claim 1, wherein:

the second data stream comprises higher and lower priority data;

variable-rate data is discarded when higher priority data from the second data stream is waiting for transmission and there is not space in the third data stream, allowing for immediate transmission of the higher priority data; and

lower priority data from the second data stream wait for space in the third data stream in accordance with a rate reduction in the variable-rate data stream.

6. The apparatus of claim 1, wherein:

the second data stream comprises data categorized into three or more levels of priority;

variable-rate data is discarded when high priority data from the second data stream is waiting for transmission and there is not space in the third data stream, allowing for immediate transmission of the high priority data;

the dim command is generated whenever the first variable-rate data stream is at full rate and medium priority data from the second data stream is waiting for transmission; and

low priority and medium priority data from the second data stream wait for space in the third data stream in accordance with a rate reduction in the variable-rate data stream.

7. The apparatus of claim 1, further comprising a variable-rate data source.

8. The apparatus of claim 1, wherein the variable-rate data source is a vocoder.

9. The apparatus of claim 1, wherein the variable-rate data source is a video encoder.

10. The apparatus of claim 1, further comprising a data service module.

11. The apparatus of claim 6, wherein the data service module is an RLP controller.

12. The apparatus of claim 6, wherein the high priority data category comprises Sync frames.

13. The apparatus of claim 6, wherein the high priority data category comprises Sync Ack frames.

14. The apparatus of claim 6, wherein the medium priority data category comprises NAK frames.

15. The apparatus of claim 6, wherein the low priority data category comprises idle frames.

16. The apparatus of claim 6, wherein the low priority data category comprises fill frames.

17. The apparatus of claim 6, wherein the low priority data category comprises re-transmitted data frames.

18. A wireless communication device comprising:

a multiplex sublayer module for receiving a first variable-rate data stream and a second data stream, forming a third data stream from the first and second data streams, and generating a dim command to reduce the rate of the first variable-rate data stream to make room for a portion of the second data stream in the third data stream.

19. A wireless communication system, including a wireless communication device, comprising:

a multiplex sublayer module for receiving a first variable-rate data stream and a second data stream, forming a third data stream from the first and second data streams, and generating a dim command to reduce the rate of the first variable-rate data stream to make room for a portion of the second data stream in the third data stream.

20. A method of multiplexing data streams, comprising:

issuing a dim command to reduce the rate of a first variable-rate data stream to make room for a portion of a second data stream in a third data stream.

21. A method of multiplexing data streams, comprising:

sending high priority data from a second data stream immediately, discarding data from a first variable-rate data stream if its rate is too high to accommodate the high priority data.

22. A method of multiplexing a variable-rate data stream with a second data stream comprising data categorized as higher or lower priority, the method comprising:

issuing a dim command to reduce the rate of the variable-rate data if its rate is too high to accommodate the higher priority data; and

waiting for the next available opportunity to transmit data from the second data stream in accordance with the rate of the variable-rate data.

23. A method of multiplexing a variable-rate data stream with a second data stream comprising data categorized as high, medium or low priority, the method comprising:

sending high priority data from the second stream immediately, discarding the variable-rate data if its rate is too high to accommodate the high priority data;

issuing a dim command to reduce the rate of the variable-rate data if its rate is too high to accommodate the medium priority data; and

waiting for the next available opportunity to transmit medium or low priority data in accordance with the rate of the variable-rate data.

24. An apparatus, comprising:

means for issuing a dim command to reduce the rate of a first variable-rate data stream to make room for a portion of a second data stream in a third data stream.

25. An apparatus, comprising:

means for discarding data from a variable-rate data stream when high priority data from a second data stream allowing for immediate transmission of the high priority data in a third data stream.

26. An apparatus, operable with a variable-rate data stream and a second data stream comprising data categorized as high, medium or low priority, the apparatus comprising:

means for sending high priority data from the second stream immediately, discarding the variable-rate data if its rate is too high to accommodate the high priority data;

means for issuing a dim command to reduce the rate of the variable-rate data if its rate is too high to accommodate the medium priority data; and

means for waiting for the next available opportunity to transmit medium or low priority data in accordance with the rate of the variable-rate data.

27. A wireless communication system, including a wireless communication device, operable with a variable-rate data stream and a second data stream comprising data categorized as high, medium or low priority, the wireless communication device comprising:

means for sending high priority data from the second stream immediately, discarding the variable-rate data if its rate is too high to accommodate the high priority data;

means for issuing a dim command to reduce the rate of the variable-rate data if its rate is too high to accommodate the medium priority data; and

means for waiting for the next available opportunity to transmit medium or low priority data in accordance with the rate of the variable-rate data.

28. Processor readable media operable to perform the following step:

issuing a dim command to reduce the rate of a first variable-rate data stream to make room for a portion of a second data stream in a third data stream.

29. Processor readable media operable to perform the following steps:

sending high priority data from a second data stream immediately, discarding data from a first variable-rate data stream if its rate is too high to accommodate the high priority data.

30. Processor readable media operable to perform the following steps:

sending high priority data from a second data stream immediately, discarding data from a first variable-rate data stream if its rate is too high to accommodate the high priority data;

issuing a dim command to reduce the rate of the first variable-rate data stream if its rate is too high to accommodate medium priority data from the second data stream; and

waiting for the next available opportunity to transmit medium or low priority data from the second data stream in accordance with the rate of the first variable-rate data stream.