Packet concatenation in wireless networks

• US 7,733,866 B2
• Filed: 04/15/2005
• Issued: 06/08/2010
• Est. Priority Date: 04/15/2004
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Goel, Sandesh, Raissinia, Alireza, Jones, Vincent K., Mishra, Partho P.
• Primary Examiner(s): Urban; Edward
• Assistant Examiner(s): Hannon; Christian A
• Application Number:
  US11/107,386
• Publication Number:
  US 20050237992A1
• Time in Patent Office: 1,880 Days
• Field of Search: 370/349, 370/432, 370/338, 370/312, 370/391, 370/392, 370/393, 370/394
• US Class Current: 370/393
• CPC Class Codes: H04L 12/2854 Wide area networks, e.g. public data networks
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365

Abstract

A wireless network includes a transmitting device and a plurality of receiving devices. The transmitting device is configured to receive a plurality of data packets, including a first data packet and a second data packet, prepare a preamble, prepare a signal field for each of the plurality of data packets, including a first signal field based on the first data packet and a second signal field based on the second data packet, and broadcast the preamble, the first signal field, the first data packet, the second signal field, and the second data packet as a concatenated packet.

Claims

1. A transmitter for preparing a concatenated data packet for transmission to a plurality of receiving devices, comprising:

means for preparing a preamble, a standard signal field comprising a length field for indicating a length of the concatenated data packet, a first signal field that describes characteristics of a first data packet and a second signal field that describes characteristics of a second data packet; and

means for broadcasting the preamble, the standard signal field, the first signal field, the first data packet, the second signal field, and the second data packet as a concatenated packet to receiving devices able to decode the concatenated message and to receiving devices unable to decode the concatenated message,

wherein legacy receiving devices use the length of the concatenated packet to defer to a wireless medium and the receiving devices able to decode concatenated messages detect use the first signal field to identify the first data packet succeeding the preamble as a concatenated data packet by detecting that the first signal field follows directly after the standard signal field,

wherein the preamble, the standard signal field, the first signal field, the first data packet, the second signal field, and the second data packet are transmitted in order, and

wherein the first signal field is immediately followed in time by the first data packet and the second signal field is immediately followed in time by the second data packet.

2. The transmitter of claim 1,

wherein the means for preparing further comprises means for receiving a third data packet while broadcasting the preamble, the standard signal field, the first signal field, the first data packet, the second signal field, and the second data packet as a concatenated packet and for preparing a third signal field that describes characteristics of the third data packet;

and

wherein the means for broadcasting further comprises means for broadcasting the third data packet and the third signal field as part of the concatenated packet.

3. The transmitter of claim 1, wherein the first data packet and the second data packet are transmitted to different ones of the plurality of receiving devices.

4. The transmitter of claim 1, wherein the first data packet and the second data packet are transmitted to different ones of the plurality of receiving devices at different transmission rates.

5. The transmitter of claim 1, further comprising means for ensuring reception of the concatenated data packet by at least one of the plurality of receiving devices using a first acknowledge policy.

6. The transmitter of claim 5, wherein the means of ensuring reception further comprises means for ensuring reception of the concatenated data packet by at least a second one of the plurality of receiving devices using a second acknowledge policy.

7. The transmitter of claim 6, wherein the first and second acknowledgement policies are selected from a group consisting of Immediate Acknowledge, Block Acknowledge, and No Acknowledge.

8. A method for preparing a concatenated data packet for transmission to a plurality of receiving devices, comprising:

preparing a preamble;

preparing a first signal field that describes characteristics of a first data packet;

preparing a second signal field that describes characteristics of a second data packet;

preparing a standard signal field, the standard signal field comprising a length field for indicating a length of the concatenated data packet;

assembling the preamble, the standard signal field, the first signal field, the second signal field, the first data packet, and the second data packet to form the concatenated data packet;

broadcasting the concatenated data packet to the plurality of receiving devices;

requesting an acknowledgement from a first one of a plurality of receiving devices; and

in the absence of an acknowledgement from the first one of the plurality of receiving devices, rebroadcasting at least one of the first data packet or the second data packet that was originally directed to the first one of the plurality of receiving devices;

wherein legacy receiving devices use the length of the concatenated packet to defer to a wireless medium and receiving devices able to decode concatenated messages use the first signal field to identify the first data packet succeeding the preamble as a concatenated data packet by detecting that the first signal field follows directly after the standard signal field.

9. The method of claim 8, wherein the first and second signal fields each comprise a rate field that indicates a data rate of each corresponding data packet.

10. The method of claim 8, wherein the first and second signal fields each comprise a continuation field, the continuation field for indicating whether a data packet associated with a particular signal field is the last data packet in the concatenated packet.

11. The method of claim 8, wherein the first and second signal fields each comprise a reserve field having a plurality of states and wherein a state of the reserve field implements at least one function selected from a set of functions consisting of space-time coding, beam-forming, adaptive bandwidth reception, and compression initialization.

12. The method of claim 8, flirt her comprising, at a receiving device, using the signal field to determine an amount of time to yield a network.

13. The method of claim 12, further comprising using one of the signal fields to override the amount of time to yield the network.

14. The method of claim 8, further comprising employing a medium access control (MAC)-protection mechanism with respect to at least one network element.

15. The method of claim 8, further comprising:

in the absence of an acknowledgement from the first one of the plurality of receiving devices, rebroadcasting the concatenated packet.

16. The method of claim 8, further comprising:

in the absence of an acknowledgement from the first one of the plurality of receiving devices, rebroadcasting the acknowledgement request.

17. The method of claim 8, further comprising:

preparing a third signal field that describes characteristics of a third data packet;

appending the third signal field and the third data packet into the concatenated packet while broadcasting the concatenated packet to the plurality of receiving devices network.

18. The method of claim 8, further comprising:

evaluating at least one network transmission characteristic; and

using the at least one network transmission characteristic to alter a maximum duration of a subsequent concatenated packet.

19. The method of claim 18, wherein the network transmission characteristic comprises time-variation.