Wireless transport framework with variable equalizer training

• US 8,650,598 B2
• Filed: 11/30/2012
• Issued: 02/11/2014
• Est. Priority Date: 07/05/2007
• Status: Active Grant

• Current Assignee: Coherent Logix, Incorporated
• Original Assignee: Coherent Logix, Incorporated
• Inventors: Shelby, Kevin A., Nysen, Peter J., Doerr, Michael B.
• Primary Examiner(s): HANCE, ROBERT J
• Application Number:
  US13/690,287
• Publication Number:
  US 20130089131A1
• Time in Patent Office: 438 Days
• Field of Search: 725/62, 375/231
• US Class Current: 725/62
• CPC Class Codes: H03M 13/1102 Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
• CPC Class Codes: H03M 13/2732 Convolutional interleaver; Interleavers using shift-registers or delay lines like, e.g. Ramsey type interleaver
• CPC Class Codes: H03M 13/29 combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes
• CPC Class Codes: H03M 13/2906 using block codes H03M13/2957 takes precedence
• CPC Class Codes: H03M 13/2909 Product codes
• CPC Class Codes: H03M 13/2936 comprising an outer Reed-Solomon code and an inner convolutional code
• CPC Class Codes: H03M 13/2957 Turbo codes and decoding
• CPC Class Codes: H03M 13/6583 Normalization other than scaling, e.g. by subtraction
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04L 25/02 Details ; arrangements for supplying electrical power along data transmission lines systems for transmitting signals via power distribution lines H04B3/54
• CPC Class Codes: H04L 27/261 Details of reference signals
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 65/611 for multicast or broadcast systems for broadcast or conference H04L12/18; arrangements for broadcast or distribution combined with broadcast H04H20/00; arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time H04H60/00; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], H04W4/06
• CPC Class Codes: H04N 21/23605 Creation or processing of packetized elementary streams [PES]
• CPC Class Codes: H04N 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/2383 Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/2389 Multiplex stream processing, e.g. multiplex stream encrypting
• CPC Class Codes: H04N 21/2402 Monitoring of the downstream path of the transmission network, e.g. bandwidth available traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876
• CPC Class Codes: H04N 21/251 Learning process for intelligent management, e.g. learning user preferences for recommending movies details of learning user preferences for the retrieval of video data in a video database G06F16/739; computer systems using learning methods G06N3/08
• CPC Class Codes: H04N 21/41407 : embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/4381 : Recovering the multiplex stream from a specific network, e.g. recovering MPEG packets from ATM cells transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/4382 : Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/4385 : Multiplex stream processing, e.g. multiplex stream decrypting
• CPC Class Codes: H04N 21/6131 : involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/6181 : involving transmission via a mobile phone network arrangements for providing broadcast or conference services to substation in data switching networks in combination with wireless systems H04L12/189; wireless uplink channel access H04W74/004
• CPC Class Codes: H04N 21/64315 : DVB-H
• CPC Class Codes: H04N 21/64322 : IP
• CPC Class Codes: H04N 21/6437 : Real-time Transport Protocol [RTP]
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/30 : Resource management for broadcast services

Abstract

A system and method for wirelessly transmitting audiovisual information. Training information may be stored in a memory. A plurality of packets may be generated, including the training information. The plurality of packets may also include audiovisual information. The plurality of packets may include first information identifying a first training pattern of a plurality of possible training patterns. The first training pattern may specify one or more locations of the training information in the plurality of packets. The first information may be usable by a receiver to determine the first training pattern of the plurality of possible training patterns. The plurality of packets may be transmitted in a wireless manner.

Claims

1. A method for wirelessly transmitting content to mobile devices, the method comprising:

storing a plurality of equalizer training sequences in a memory;

selecting a training pattern, wherein the training pattern specifies equalizer training sequences of the plurality of equalizer training sequences for inclusion in a plurality of packets and locations in the plurality of packets for the specified equalizer training sequences, wherein the training pattern is selected from a plurality of possible training patterns, wherein each of the plurality of possible training patterns comprises a different amount of training information, wherein the training pattern is selected based on training needs of equalizer technology of the mobile devices;

generating a plurality of packets using the selected training pattern, wherein the plurality of packets comprise content and control information, wherein the control information comprises an indication of the training pattern used in the plurality of packets; and

transmitting the plurality of packets in a wireless manner,

wherein selecting the training pattern comprises selecting a training pattern which specifies a lesser amount of training information for improved equalizer technology or selecting a training pattern which specifies a greater amount of training information for older equalizer technology.

2. The method of claim 1,

wherein a first training pattern of the plurality of possible training patterns specifies that no equalizer training sequences be included in the plurality of packets, wherein a second training pattern of the plurality of possible training patterns specifies that a plurality of training sequences be included in the plurality of packets.

3. The method of claim 1,

wherein if the selected training pattern specifies fewer than a maximum number of training sequences, one or more locations in the plurality of packets allocated for equalizer training sequences according to at least one training pattern comprise content.

4. The method of claim 1,

wherein the equalizer training sequences are configured for updating a receiver'"'"'s equalizer to track fast moving channel conditions.

5. The method of claim 1,

wherein the indication of the training pattern comprises an orthogonal gold code, wherein each of a plurality of orthogonal gold codes correspond to each of the plurality of possible training patterns.

6. A system for generating packets configured for wireless transmission to mobile devices, the system comprising:

a memory, wherein a plurality of equalizer training sequences are stored in the memory; and

transmit logic operatively coupled to the memory, wherein the transmit logic is configured to;

select a training pattern, wherein the training pattern specifies equalizer training sequences of the plurality of equalizer training sequences for inclusion in a plurality of packets and locations in the plurality of packets for the specified equalizer training sequences, wherein the training pattern is selected from a plurality of possible training patterns, wherein each of the plurality of possible training patterns comprises a different amount of training information, wherein the training pattern is selected based on training needs of equalizer technology of the mobile devices; and

generate a plurality of packets using the selected training pattern, wherein the plurality of packets comprise content and control information,

wherein the control information comprises an indication of the training pattern used in the plurality of packets,

wherein the plurality of packets are configured to be transmitted in a wireless manner,

wherein selecting the training pattern comprises selecting a training pattern which specifies a lesser amount of training information for improved equalizer technology or selecting a training pattern which specifies a greater amount of training information for older equalizer technology.

7. The system of claim 6,

wherein the plurality of possible training patterns comprise training patterns that specify 0, 2, 3, 4, or 6 equalizer training sequences be included in the plurality of packets.

8. The system of claim 6,

wherein a first training pattern comprises a maximum number of training sequences, wherein if the selected training pattern specifies fewer than the maximum number of training sequences, one or more locations in the plurality of packets allocated for equalizer training sequences according to the first training pattern comprise content.

9. A non-transitory computer accessible memory medium, wherein a plurality of equalizer training sequences are stored in the memory, wherein the memory medium stores program instructions for generating packets configured for wireless transmission to mobile devices, wherein the program instructions are executable to:

select a training pattern, wherein the training pattern specifies equalizer training sequences of the plurality of equalizer training sequences for inclusion in a plurality of packets and locations in the plurality of packets for the specified equalizer training sequences, wherein the training pattern is selected from a plurality of possible training patterns, wherein each of the plurality of possible training patterns comprises a different amount of training information, wherein the training pattern is selected based on training needs of equalizer technology of the mobile devices; and

generate a plurality of packets using the selected training pattern, wherein the plurality of packets comprise content and control information,

wherein the control information comprises an indication of the training pattern used in the plurality of packets,

wherein the plurality of packets are configured to be transmitted in a wireless manner,

wherein selecting the training pattern comprises selecting a training pattern which specifies a lesser amount of training information for improved equalizer technology or selecting a training pattern which specifies a greater amount of training information for older equalizer technology.

10. A method for receiving and presenting content wirelessly received at a mobile device, the method comprising:

storing a plurality of reference equalizer training sequences in a memory;

receiving a plurality of packets in a wireless manner, wherein the plurality of packets comprise content and control information, wherein a plurality of locations in the plurality of packets are allocated for equalizer training sequences,

wherein the control information comprises an indication of a training pattern used in the plurality of packets, wherein the training pattern specifies which of a plurality of equalizer training sequences are included in the plurality of packets and which of the locations in the plurality of packets allocated for equalizer training sequences are used for those of the plurality of equalizer training sequences which are included in the plurality of packets, wherein the training pattern is selected by a transmitter based on training needs of equalizer technology of the mobile device;

identifying the training pattern based on the indication of the training pattern;

training an equalizer of the mobile device, comprising comparing equalizer training sequences received in the plurality of packets to corresponding reference equalizer training sequences of the plurality of reference equalizer training sequences stored in the memory; and

processing at least a portion of the plurality of packets using the trained equalizer,

wherein the training pattern is selected from a plurality of possible training patterns, wherein a training pattern which specifies a lesser amount of training information is selected for improved equalizer technology, wherein a training pattern which specifies a greater amount of training information is selected for older equalizer technology.

11. The method of claim 10, further comprising:

presenting at least a portion of the content comprised in the plurality of packets on the mobile device;

wherein locations in the plurality of packets allocated for equalizer training sequences which are not used for equalizer training sequences according to the training pattern comprise content.

12. The method of claim 10,

wherein training the equalizer using the received equalizer training sequences updates the mobile device'"'"'s equalizer to track fast moving channel conditions.

13. The method of claim 10,

wherein the indication of the training pattern comprises an orthogonal gold code, wherein each of a plurality of orthogonal gold codes correspond to each of a plurality of possible training patterns.

14. The method of claim 10, wherein the content comprises audiovisual information, the method further comprising:

presenting the audiovisual information on one or more of a display and a speaker.

15. A system for processing packets wirelessly received at a mobile device, the system being for use in the mobile device, the system comprising:

a memory for storing a plurality of reference equalizer training sequences;

an input for receiving a plurality of packets, wherein the plurality of packets were transmitted in a wireless manner, wherein the plurality of packets comprise content and control information, wherein a plurality of locations in the plurality of packets are allocated for equalizer training sequences,

wherein the control information comprises an indication of a training pattern used in the plurality of packets, wherein the training pattern specifies which of a plurality of equalizer training sequences are included in the plurality of packets and which of the locations in the plurality of packets allocated for equalizer training sequences are used for those of the plurality of equalizer training sequences which are included in the plurality of packets, wherein the training pattern is selected by a transmitter based on training needs of equalizer technology of the system; and

receiver logic operatively coupled to the memory and the input, wherein the receiver logic is configured to

identify the training pattern based on the indication of the training pattern;

train an equalizer of the system, comprising comparing equalizer training sequences received in the plurality of packets to corresponding reference equalizer training sequences of the plurality of reference equalizer training sequences stored in the memory; and

process at least a portion of the plurality of packets using the trained equalizer,

wherein the training pattern is selected from a plurality of possible training patterns, wherein a training pattern which specifies a lesser amount of training information is selected for improved equalizer technology, wherein a training pattern which specifies a greater amount of training information is selected for older equalizer technology.

16. The system of claim 15,

wherein locations in the plurality of packets allocated for equalizer training sequences which are not used for equalizer training sequences according to the training pattern comprise content.

17. A non-transitory computer accessible memory medium, wherein a plurality of reference equalizer training sequences are stored on the memory medium, wherein the memory medium stores program instructions for a mobile device to process wirelessly received packets, wherein the program instructions are executable to:

receive a plurality of packets, wherein the plurality of packets comprise content and control information, wherein a plurality of locations in the plurality of packets are allocated for equalizer training sequences,

wherein the control information comprises an indication of a training pattern used in the plurality of packets, wherein the training pattern specifies which of a plurality of equalizer training sequences are included in the plurality of packets and which of the locations in the plurality of packets allocated for equalizer training sequences are used for those of the plurality of equalizer training sequences which are included in the plurality of packets, wherein the training pattern is selected by a transmitter based on training needs of equalizer technology of the mobile device;

identify the training pattern based on the indication of the training pattern;

train an equalizer, comprising comparing equalizer training sequences received in the plurality of packets to corresponding reference equalizer training sequences of the plurality of reference equalizer training sequences stored in the memory; and

process at least a portion of the plurality of packets using the trained equalizer,

wherein the training pattern is selected from a plurality of possible training patterns, wherein a training pattern which specifies a lesser amount of training information is selected for improved equalizer technology, wherein a training pattern which specifies a greater amount of training information is selected for older equalizer technology.