MULTIPLEXING SCHEMES FOR OFDMA

• US 20130010729A1
• Filed: 09/14/2012
• Published: 01/10/2013
• Est. Priority Date: 10/21/2005
• Status: Active Grant

• Current Assignee: Hang Zhang, Jianglei Ma, Kelvin Kar-Kin Au, Mo-Han Fong, Peiying Zhu, Robert Novak, Sophie Vrzic, Wen Tong
• Original Assignee: Hang Zhang, Jianglei Ma, Kelvin Kar-Kin Au, Mo-Han Fong, Peiying Zhu, Robert Novak, Sophie Vrzic, Wen Tong
• Inventors: Novak, Robert, Zhang, Hang, Vrzic, Sophie, Fong, Mo-Han, Au, Kelvin Kar-Kin, Ma, Jianglei, Zhu, Peiying, Tong, Wen
• Granted Patent: US 10,277,360 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0013 Rate matching, e.g. puncturing or repetition of code symbols
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0067 Rate matching H04L1/0013 and H04L1/08 take precedence
• CPC Class Codes: H04L 1/14 in which the signals are sent back to the transmitter to be checked ; echo systems
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1867 Arrangements specially adapted for the transmitter end
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0042 intra-user or intra-terminal allocation
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04L 65/80 Responding to QoS

Abstract

Methods and systems are provided for allocating resources including VoIP (voice over Internet Protocol) and Non-VoIP resources. In some embodiments, multiplexing schemes are provided for use with OFDMA (orthogonal frequency division multiplexing access) systems, for example for use in transmitting VoIP traffic. In some embodiments, various HARQ (Hybrid Automatic request) techniques are provided for use with OFDMA systems. In various embodiments, there are provided methods and systems for dealing with issues such as Handling non-full rate vocoder frames, VoIP packet jitter handling, VoIP capacity increasing schemes, persistent and non-persistent assignment of resources in OFDMA systems.

Claims

1. A base station comprising:

a scheduler to schedule packets for transmission;

a signalling information generator to generate signalling information based on information received from the scheduler;

a frame generator to construct frames based on information from the scheduler;

a transmitter to transmit the frames;

a receiver to receive feedback to aid in determining whether the transmitted frames were successfully received.

2. The base station of claim 1, wherein the scheduler receives the feedback from the receiver and utilizes the feedback to schedule packets.

3. The base station of claim 1, wherein the scheduler has access to the packets through a physical connection.

4. The base station of claim 1, wherein the scheduler has access to the packets by accessing a stored memory

5. The base station of claim 1, wherein frames generated by the frame generator include signalling information from the signalling information generator.

7. The method of claim 5, further comprising:

scheduling a second plurality of packets for transmission based on the feedback.

8. The method of claim 5, wherein said generating the plurality of frames is based on the signalling information.

9. The method of claim 8, wherein the plurality of frames comprise the signalling information.

10. The method of claim 5, wherein the plurality of frames comprise a plurality of sub-packets corresponding to the plurality of packets.

11. The method of claim 10, wherein multiple sub-packets for a given packet are usable in combination to decode at least a portion of the signalling information.

6. A method for performing transmission, comprising:

scheduling a plurality of packets for transmission;

generating signalling information based on said scheduling;

generating a plurality frames for transmission based on said scheduling;

transmitting the plurality of frames; and

receiving feedback indicating whether the transmitted frames were successfully received.

12. A non-transitory, computer accessible memory medium storing program instructions for performing transmission, wherein the program instructions are executable by one or more processors to:

schedule a plurality of packets for transmission;

generate signalling information based on said scheduling;

generate a plurality frames for transmission based on said scheduling;

transmit the plurality of frames; and

receive feedback indicating whether the transmitted frames were successfully received.

13. The non-transitory, computer accessible memory medium of claim 12, wherein the program instructions are further executable to:

schedule a second plurality of packets for transmission based on the feedback.

14. The non-transitory, computer accessible memory medium of claim 12, wherein said generating the plurality of frames is based on the signalling information.

15. The non-transitory, computer accessible memory medium of claim 12, wherein the plurality of frames comprise the signalling information.

16. The non-transitory, computer accessible memory medium of claim 12, wherein the plurality of frames comprise a plurality of sub-packets corresponding to the plurality of packets, wherein multiple sub-packets for a given packet are usable in combination to decode at least a portion of the signalling information.

17. A wireless station comprising:

a receiver to receiver frames;

a signalling information decoder to extract signalling channels from received frame and determine whether a resource has been scheduled for the wireless station, and if so where;

a sub-packet extraction module to extract signalling channels from the received frames;

a packet decoder to decode information on the signalling channels;

a transmitter to send feedback indicating whether the transmitted frames were successfully decoded.

18. The wireless station of claim 17, wherein when multiple sub-packets for a given packet have been received, the multiple sub-packets are used in combination by the packet decoder to decode the information on the signalling channels.

20. The method of claim 18, further comprising:

wherein when multiple sub-packets for a given packet have been received, the multiple sub-packets are used in combination to perform said decoding the information on the signalling channels

19. A method for performing reception, comprising:

a wireless station receiving a plurality of frames;

the wireless station extracting signalling channels from the plurality of frames;

the wireless station determining resources scheduled for the wireless station;

the wireless station decoding information on the signalling channels;

the wireless station transmitting feedback indicating whether the plurality of frames were successfully decoded based on said decoding.