Packet-Based Data Processing Technique

• US 20080285491A1
• Filed: 06/29/2004
• Published: 11/20/2008
• Est. Priority Date: 06/29/2004
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Ludwig, Reiner, Meyer, Michael, Parkvall, Stefan, Wiberg, Niclas
• Granted Patent: US 8,149,875 B2
• Time in Patent Office: Days
• US Class Current: 370/310
• CPC Class Codes: H04L 1/0013 Rate matching, e.g. puncturing or repetition of code symbols
• CPC Class Codes: H04L 1/0069 Puncturing patterns
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements

Abstract

A technique is provided for processing data in a packet-based communications environment. A single data packet is encapsulated into a single link layer packet data unit. The link layer unit is encoded to form at least one code block. After the currently available radio resource capacity during a fixed duration transmission interval has been determined, bits within the code block are selected to fit into or otherwise match the radio resource capacity. Thereafter, the selected bits are transmitted via a physical layer. In some variations, unsolicited redundant sets of bits are transmitted thereafter to facilitate successful receipt.

Claims

1. A method for processing data in a packet-based communications environment, the method comprising the steps of:

encapsulating a single data packet into one link layer packet data unit;

encoding the link layer packet data unit to form at least one code block;

determining radio resource capacity during a fixed duration transmission interval;

selecting bits of the at least one code block to fit into the available radio resource capacity; and

transmitting the selected bits via a physical layer.

2. The method of claim 1, wherein the selecting step punctures the at least one code block to fit into the available radio resource capacity.

3. The method of claim 1, wherein the encoding step encodes the link layer packet data units with a channel coder.

4. The method of claim 1, further comprising the step of:

retransmitting the selected bits until an acknowledgement signal is received.

5. The method of claim 1, further comprising the steps of:

i. selecting the bits of the at least one code block to fit within currently available radio resource capacity;

ii. transmitting the selected bits via the physical layer; and

iii. repeating steps (i) and (ii) until an acknowledgment signal is received.

6. The method of claim 4, further comprising the step of:

determining the probability of a successful receipt of the selected bits, wherein the transmission or retransmission is performed dependent on the determined probability.

7. The method of claim 5, wherein a redundancy is adjusted for each transmission.

8. The method of claim 4, wherein the selected bits are transmitted or retransmitted independent of a signal indicating that the link layer packet data unit was not successfully received.

9. The method of claim 4, further comprising the step of storing the at least one of code bits and control information for subsequent access by at least one of a the sender and a the receiver.

10. The method of claim 1, wherein the selecting step distributes the at least one code block into two or more sets of bits, each having the same sequence number, when the amount of bits that need to be transmitted exceeds the o transmission capabilities of the currently available radio resource capacity.

11. The method of claim 1, further comprising the step of:

scheduling the transmission of the data packets based on requirements of an application or service.

12. The method of claim 11, wherein the scheduling is based on at least one characteristic chosen from the group comprising:

data packet header information, queue length, queuing time of data packets, data packet lengths, and radio resource capacity.

13. The method of claim 1, further comprising the step of transmitting control information pertaining to the link layer data.

14. The method of claim 13, wherein the control information includes at least one of the group comprising:

link layer packet data unit sequence number, pay-load size, puncturing pattern, code rate, amount of coded bits, and redundancy version identification.

15. The method of claim 1, wherein the communications environment is a wireless system.

16. The method of claim 1, wherein the fixed duration transmission interval is the next subsequent transmission interval.

17. A method for processing data in a packet-based communications environment, the method comprising the steps of:

receiving at least one set of bits corresponding to at least one code block, each set of bits being received during a fixed duration transmission interval and substantially consuming all radio resource capacity during the respective transmission interval, the at least one code block corresponding to a link layer packet data unit encapsulated from a single data packet; and

subjecting the received at least one set of bits corresponding to the data packet to a decoding operation.

18. The method of claim 17, further comprising the step of:

sending an acknowledgment signal if the decoding operation was successful or a non-acknowledgment signal if the decoding operation was not successful.

19-21. -21. (canceled)

22. An apparatus for processing data in a packet-based communications environment, the apparatus comprising:

a construction unit for encapsulating a single data packet into one link layer packet data unit;

a coder for encoding the link layer packet data unit to form at least one code block;

an analysis unit for determining radio resource capacity during a fixed duration transmission interval;

a selection unit for selecting bits of the code block to fit into the available radio resource capacity; and

a transmitter for transmitting the selected bits via a physical layer.

23. An apparatus for processing data in a packet-based communications environment, the system comprising:

a receiver to receive at least one set of bits corresponding to at least one code block, each set of bits being received during a fixed duration transmission interval and substantially consuming all radio resource capacity during the respective transmission interval, the at least one code block corresponding to a link layer packet data unit encapsulated from a single data packet; and

a decoder to subject the received at least one set of bits corresponding to the data packet to a decoding operation.

24. The apparatus of claim 23, further comprising:

a feedback unit to send an acknowledgment signal if the decoding operation was successful or a non-acknowledgment signal if the decoding operation was not successful.