Packet retransmission and memory sharing

• US 9,485,055 B2
• Filed: 01/20/2014
• Issued: 11/01/2016
• Est. Priority Date: 04/12/2006
• Status: Active Grant

• Current Assignee: TQ Delta LLC (Techquity Capital Management, LLC)
• Original Assignee: TQ Delta LLC (Techquity Capital Management, LLC)
• Inventors: Tzannes, Marcos C.
• Primary Examiner(s): Decady, Albert
• Assistant Examiner(s): Alshack, Osman M
• Application Number:
  US14/159,125
• Publication Number:
  US 20140133491A1
• Time in Patent Office: 1,016 Days
• Field of Search: 714/748, 714/749, 714/776
• US Class Current: 1/1
• CPC Class Codes: H03M 13/00 Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes error detection or error correction for analogue/digital, digital/analogue or code conversion H03M1/00 – H03M11/00; specially adapted for digital computers G06F11/08; for information storage based on relative movement between record carrier and transducer G11B, e.g. G11B20/18; for static stores G11C
• CPC Class Codes: H03M 13/09 Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
• CPC Class Codes: H03M 13/091 Parallel or block-wise CRC computation
• CPC Class Codes: H03M 13/2707 Simple row-column interleaver, i.e. pure block interleaving
• CPC Class Codes: H03M 13/6513 Support of multiple code types, e.g. unified decoder for LDPC and turbo codes
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1809 Selective-repeat protocols
• CPC Class Codes: H04L 1/1835 Buffer management
• CPC Class Codes: H04L 1/1874 Buffer management
• CPC Class Codes: H04L 12/5601 Transfer mode dependent, e.g. ATM
• CPC Class Codes: H04L 2012/5647 Cell loss
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/72 Routing based on the source address
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/2433 Allocation of priorities to traffic types
• CPC Class Codes: H04L 47/2441 : relying on flow classification, e.g. using integrated services [IntServ]
• CPC Class Codes: H04L 47/32 : by discarding or delaying data units, e.g. packets or frames
• CPC Class Codes: H04L 49/552 : by ensuring the integrity of packets received through redundant connections
• CPC Class Codes: H04L 69/324 : in the data link layer [OSI layer 2], e.g. HDLC

Abstract

Through the identification of different packet-types, packets can be handled based on an assigned packet handling identifier. This identifier can, for example, enable forwarding of latency-sensitive packets without delay and allow error-sensitive packets to be stored for possible retransmission. In another embodiment, and optionally in conjunction with retransmission protocols including a packet handling identifier, a memory used for retransmission of packets can be shared with other transceiver functionality such as, coding, decoding, interleaving, deinterleaving, error correction, and the like.

Claims

1. A method of packet retransmission, in a transceiver, comprising:

transmitting, by the transceiver, a first type of packet; and

transmitting, by the transceiver, a second type of packet,

wherein the first type of packet is stored in a retransmission buffer after transmission and the second type of packet is not stored in a retransmission buffer after transmission,

wherein the first and second types of packet comprise a header field that indicates whether a transmitted packet is a first type of packet or a second type of packet, and

wherein the header field of the first type of packet comprises a sequence identifier (SID) that is incremented after the first type of packet is transmitted and the header field of the second type of packet does not comprise the SID of the first type of packet.

2. The method of claim 1, wherein the transceiver is connected to a second transceiver using a wired or wireless channel and the transceivers are used to transport one or more of video and voice data.

3. The method of claim 1, wherein the method is performed in a linecard that is operable to transport video.

4. The method of claim 1, wherein the method is performed in a customer premises modem that is operable to transport video.

5. The method of claim 1, wherein the transceiver includes at least one digital signal processor.

6. The method of claim 1, wherein the transceiver includes at least one A SIC (Application Specific Integrated Circuit).

7. The method of claim 1, wherein the first type of packet comprises one or more PTM-TC (Packet Transfer Mode-Transmission Convergence) codewords.

8. The method of claim 1, wherein the first type of packet comprises one or more ATM (Asynchronous Transfer Mode) cells.

9. The method of claim 1, wherein the first type of packet comprises one or more Reed Solomon codewords.

10. The method of claim 1, wherein the first type of packet is a low-PER (Packet Error Rate) packet and the second type of packet is a low-latency packet.

11. A transceiver operable to transmit a first type of packet and to transmit a second type of packet, wherein the first type of packet is stored in a retransmission buffer after transmission and the second type of packet is not stored in a retransmission buffer after transmission, and wherein the first and second types of packet comprise a header field that indicates whether a transmitted packet is a first type of packet or a second type of packet, and wherein the header field of the first type of packet comprises a sequence identifier (SID) that is incremented after the first type of packet is transmitted and the header field of the second type of packet does not comprise the SID of the first type of packet.

12. The transceiver of claim 11, wherein the transceiver is connected to a second transceiver using a wired or wireless channel and the transceivers are used to transport one or more of video and voice data.

13. The transceiver of claim 11, wherein the transceiver is located in a linecard that is operable to transport video.

14. The transceiver of claim 11, wherein the transceiver is located in a customer premises modem that is operable to transport video.

15. The transceiver of claim 11, wherein the transceiver includes at least one digital signal processor.

16. The transceiver of claim 11, wherein the transceiver includes at least one ASIC (Application Specific Integrated Circuit).

17. The transceiver of claim 11, wherein the first type of packet comprises one or more PTM-TC (Packet Transfer Mode-Transmission Convergence) codewords.

18. The transceiver of claim 11, wherein the first type of packet comprises one or more ATM (Asynchronous Transfer Mode) cells.

19. The transceiver of claim 11, wherein the first type of packet comprises one or more Reed Solomon codewords.

20. The transceiver of claim 11, wherein the first type of packet is a low-PER (Packet Error Rate) packet and the second type of packet is a low-latency packet.