Apparatus and methods of processing a protocol data unit

• US 9,344,901 B2
• Filed: 01/27/2014
• Issued: 05/17/2016
• Est. Priority Date: 04/16/2013
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Shah, Sagar B., Inampudi, Venkata Srihari, Kanamarlapudi, Sitaramanjaneyulu, Udupa Sripathi, Prashant, Stein, Jeremy M., Kasturi, Nitin, Kim, Je Woo, Amerga, Messay, Gopalan, Ravi
• Primary Examiner(s): Jung, Min
• Application Number:
  US14/165,181
• Publication Number:
  US 20140307563A1
• Time in Patent Office: 841 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/201 Frame classification, e.g. bad, good or erased frame indication per se H04L1/0082
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements

Abstract

Methods and apparatus for processing data received at a user equipment comprises determining a protocol data unit (PDU)-specific Layer 1 decoding metric of a Layer 1 decoded PDU. The methods and apparatus further comprises determining whether to perform a Layer 2 decoding of the Layer 1 decoded PDU based on the PDU-specific Layer 1 decoding metric.

Claims

1. A method of processing data received at a user equipment (UE), comprising:

determining a protocol data unit (PDU)-specific Layer 1 decoding metric of a Layer 1 decoded PDU, including;

performing one or more arithmetic operations using weighted products of one or both of a symbol error rate and an energy metric, wherein the symbol error rate and the energy metric are associated with the Layer 1 decoded PDU; and

determining whether to perform a Layer 2 decoding of the Layer 1 decoded PDU based on the PDU-specific Layer 1 decoding metric.

2. The method of claim 1, wherein determining the PDU-specific Layer 1 decoding metric further comprises:

determining based at least in part on one or more of the symbol error rate, or the energy metric, or a zero state bit value, or a q bit value, wherein the symbol error rate, the energy metric, the zero state bit value, and the q bit value are associated with the Layer 1 decoded PDU.

3. The method of claim 1, further comprising:

obtaining a Layer 1 decoder metric threshold value; and

determining a confidence level value of the Layer 1 decoded PDU based on comparing the PDU-specific Layer 1 decoding metric to the Layer 1 decoder metric threshold value;

wherein determining whether to perform the Layer 2 decoding is based at least in part on the confidence level value.

4. The method of claim 3, wherein the Layer 1 decoder metric threshold value indicates a decoding error tolerance level for the Layer 2 decoding of the Layer 1 decoded PDU.

5. The method of claim 3, wherein determining the confidence level value further comprises determining an acceptable confidence level value, and wherein the method further comprises performing the Layer 2 decoding of the Layer 1 decoded PDU based on determining the acceptable confidence level value.

6. The method of claim 3, wherein determining the confidence level value further comprises determining an unacceptable confidence level value, and wherein the method comprises performing a Layer 2 reset based on determining the unacceptable confidence level value.

7. The method of claim 3, wherein determining the PDU-specific Layer 1 decoding metric further comprises determining a plurality of PDU-specific Layer 1 decoding metrics, wherein obtaining the Layer 1 decoder metric threshold value further comprises obtaining a plurality of Layer 1 decoder metric threshold values, and wherein determining the confidence level value of the Layer 1 decoded PDU is further based on comparing each of the plurality of the PDU-specific Layer 1 decoding metrics to a corresponding one of the plurality of the Layer 1 decoder metric threshold values.

8. The method of claim 3, wherein obtaining the Layer 1 decoder metric threshold value further comprises receiving an input from a network entity that sets a value for the Layer 1 decoder metric threshold value.

9. The method of claim 3, wherein obtaining the Layer 1 decoder metric threshold value further comprises determining the Layer 1 decoder metric threshold value.

10. The method of claim 9, wherein determining the Layer 1 decoder metric threshold value further comprises determining based on at least one of:

a previous PDU-specific Layer 1 decoding metric of a previously-processed Layer 1 decoded PDU,

a prior PDU-specific Layer 1 decoding metric of a prior-processed Layer 1 decoded transport block having a cyclic redundancy check bit,

a transmission time interval corresponding to the Layer 1 decoded PDU,

a number of cells in an active set of the UE,

a channel condition of a channel on which the Layer 1 decoded PDU was received, or

a class of a channel on which the Layer 1 decoded PDU was received.

11. The method of claim 3, wherein obtaining the Layer decoder metric threshold value further comprises obtaining one or more of:

a static value,

a dynamic value, or

a dynamic value having a hysteresis-based change.

12. The method of claim 1, further comprising:

receiving error check information that indicates the Layer 1 decoded PDU has passed a Layer 1 error check; and

wherein determining whether to perform the Layer 2 decoding of the Layer 1 decoded PDU further comprises determining to prevent Layer 2 decoding of the Layer 1 decoded PDU that was indicated as having passed the Layer 1 error check.

13. The method of claim 1, further comprising:

determining, at a Layer 1 entity, that the Layer 1 decoded is valid;

wherein determining whether to perform the Layer 2 decoding of the Layer 1 decoded PDU further comprises determining to prevent Layer 2 decoding of the Layer 1 decoded PDU that was determined as being valid.

14. A non-transitory computer-readable medium storing computer-executable code for communication, comprising:

code for determining a protocol data unit (PDU)-specific Layer 1 decoding metric of a Layer 1 decoded PDU, including;

code for performing one or more arithmetic operations using weighted products of one or both of a symbol error rate and an energy metric, wherein the symbol error rate and the energy metric are associated with the Layer 1 decoded PDU; and

code for determining whether to perform a Layer 2 decoding of the Layer 1 decoded PDU based on the PDU-specific Layer 1 decoding metric.

15. An apparatus for communication, comprising:

means for determining a protocol data unit (PDU)-specific Layer 1 decoding metric of a Layer 1 decoded PDU, including;

means for performing one or more arithmetic operations using weighted products of one or both of a symbol error rate and an energy metric, wherein the symbol error rate and the energy metric are associated with the Layer 1 decoded PDU; and

means for determining whether to perform a Layer 2 decoding of the Layer 1 decoded PDU based on the PDU-specific Layer 1 decoding metric.

16. An apparatus for communication, comprising:

at least one processor; and

a memory coupled to the at least one processor,

wherein the at least one processor is configured to;

determine a protocol data unit (PDU)-specific Layer 1 decoding metric of a Layer 1 decoded PDU, including being configured to;

perform one or more arithmetic operations using weighted products of one or both of a symbol error rate and an energy metric, wherein the symbol error rate and the energy metric are associated with the Layer 1 decoded PDU; and

determine whether to perform a Layer 2 decoding of the Layer 1 decoded PDU based on the PDU-specific Layer 1 decoding metric.

17. The apparatus of claim 16, wherein to determine the PDU-specific Layer 1 decoding metric, the at least one processor is further configured to determine based at least in part on one or more of the symbol error rate, or the energy metric, or a zero state bit value, or a q bit value, wherein the symbol error rate, the energy metric, the zero state bit value, and the q bit value are associated with the Layer 1 decoded PDU.

18. The apparatus of claim 16, wherein the at least one processor is further configured to:

obtain a Layer 1 decoder metric threshold value; and

determine a confidence level value of the Layer 1 decoded PDU based on comparing the PDU-specific Layer 1 decoding metric to the Layer 1 decoder metric threshold value;

wherein determining whether to perform the Layer 2 decoding is based at least in part on the confidence level value.

19. The apparatus of claim 18, wherein the Layer 1 decoder metric threshold value indicates a decoding error tolerance level for the Layer 2 decoding of the Layer 1 decoded PDU.

20. The apparatus of claim 18, wherein to determine the confidence level value, the at least one processor is further configured to determine an acceptable confidence level value, and wherein the processor is further configured to perform the Layer 2 decoding of the Layer 1 decoded PDU based on determining the acceptable confidence level value.

21. The apparatus of claim 18, wherein to determine the confidence level value, the at least one processor is further configured to determine an unacceptable confidence level value, and wherein the processor is further configured to perform a Layer 2 reset based on determining the unacceptable confidence level value.

22. The apparatus of claim 18, wherein to determine the PDU-specific Layer 1 decoding metric, the at least one processor is further configured to determine a plurality of PDU-specific Layer 1 decoding metrics,

wherein to obtain the Layer 1 decoder metric threshold value, the at least one processor is further configured to obtain a plurality of Layer 1 decoder metric threshold values, and

wherein to determine the confidence level value of the Layer 1 decoded PDU, the at least one processor is further configured to compare each of the plurality of the PDU-specific Layer 1 decoding metrics to a corresponding one of the plurality of the Layer 1 decoder metric threshold values.

23. The apparatus of claim 18, wherein to obtain the Layer 1 decoder metric threshold value, the at least one processor is further configured to receive an input from a network entity that sets a value for the Layer 1 decoder metric threshold value.

24. The apparatus of claim 18, wherein to obtain the Layer 1 decoder metric threshold value, the at least one processor is further configured to determine the Layer 1 decoder metric threshold value.

25. The apparatus of claim 24, wherein determining the Layer 1 decoder metric threshold value further comprises determining based on at least one of:

a previous PDU-specific Layer 1 decoding metric of a previously-processed Layer 1 decoded PDU,

a prior PDU-specific Layer 1 decoding metric of a prior-processed Layer 1 decoded transport block having a cyclic redundancy check bit,

a transmission time interval corresponding to the Layer 1 decoded PDU,

a number of cells in an active set of the UE,

a channel condition of a channel on which the Layer 1 decoded PDU was received, or

a class of a channel on which the Layer 1 decoded PDU was received.

26. The apparatus of claim 18, wherein to obtain the Layer 1 decoder metric threshold value, the at least one processor is further configured to obtain one or more of a static value, or a dynamic value, or a dynamic value having a hysteresis-based change.

27. The apparatus of claim 16, wherein the at least one processor is further configured to:

receive error check information that indicates the Layer 1 decoded PDU has passed a Layer 1 error check; and

wherein to determine whether to perform the Layer 2 decoding of the Layer 1 decoded PDU, the at least one processor is further configured to determine to prevent Layer 2 decoding of the Layer 1 decoded PDU that was indicated as having passed the Layer 1 error check.

28. The apparatus of claim 16, wherein the at least one processor is further configured to:

determine, at a Layer 1 entity, that the Layer 1 decoded is valid;

wherein to determine whether to perform the Layer 2 decoding of the Layer 1 decoded PDU, the apparatus is further configured to prevent Layer 2 decoding of the Layer 1 decoded PDU that was determined as being valid.