Minimalistic LTE maintenance timing advance method

Patent metadata

Field	Value
Publication number	US-9344986-B2
Application number	US-201414216912-A
Country	US
Kind code	B2
Filing date	Mar 17, 2014
Priority date	Dec 15, 2011
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A method that implements a timing advance for an uplink communication from a user equipment (UE) comprises: selecting at least one subframe; reducing a duration of at least one selected symbol of each of the at least one subframe to generate at least one reduced duration subframe; replacing a remaining portion of payload data of each of the at least one selected symbol with a pre-selected replacement value; by-passing each of the at least one selected symbol during pre-transmission processing of the at least one reduced duration subframe; processing any remaining symbols of the at least one reduced duration subframe, such that a processing time of the remaining symbols of the at least one reduced duration subframe is reduced by at least the value of the timing advance; and transmitting the at least one reduced duration subframe via the uplink communication to the base station.

First claim

What is claimed is:

1. A user equipment (UE), the UE comprising:
a processor to:
select at least one subframe that is scheduled for pre-transmission processing, wherein, in the pre-transmission processing, payload data within each subframe to be transmitted from the UE to a base station are processed prior to being transmitted via an uplink communication;
reduce a duration of the at least one subframe by a value of a timing advance to generate at least one reduced duration subframe;
replace at least a portion of the payload data in the at least one reduced duration subframe with a pre-selected replacement value;
withhold pre-transmission processing of the at least a portion of the payload data replaced with the pre-selected replacement value; and
perform pre-transmission processing of any remaining portion of the at least one subframe, wherein a processing time of the remaining portion of the at least one subframe is reduced by at least the value of the timing advance; and

transceiver circuitry, communicatively coupled with the processing unit, to transmit the at least one reduced duration subframe via the uplink communication to the base station.

2. The UE of claim 1 , wherein the at least one subframe comprises a plurality of symbols, each having payload data, and wherein:
to reduce the duration of the at least one subframe comprises, to reduce, for each of the at least one subframe, a duration of at least one symbol of the plurality of symbols, wherein a combination of a reduced duration of each of the at least one symbol equals to the value of the timing advance;
to replace the at least a portion of the payload data comprises to replace a remaining portion of each of the at least one symbols with the pre-selected replacement value;
to withhold the pre-transmission processing of the at least a portion of the payload data with the pre-selected replacement value comprises to skip the pre-transmission processing of each of the at least one symbol; and
to process the remaining portion of the at least one subframe comprises to process any remaining symbols of the at least one subframe that still contain payload data.

3. The UE of claim 2 , wherein to reduce the duration of the at least one subframe comprises to discard at least a portion of the payload data of at least one symbol within the at least one subframe, wherein any applicable default guard time of the wireless network that is factored into the timing advance equals at least the value of the timing advance; and the processing unit further to:
replace the remaining portion of the at least one symbol with the pre-selected replacement value.

4. The UE of claim 1 , wherein the processing processor is further to:
process adjacent subframes to the at least one subframe as full subframes; and
the transceiver circuitry is to transmit the adjacent subframes and the at least one reduced duration subframe within the uplink communication.

5. The UE of claim 1 , wherein incorporation of the pre-selected replacement value within the at least one reduced duration subframe triggers the base station to apply one of a data-recovering algorithm and an error correction mechanism to recover payload data missing from the at least one subframe.

6. The UE of claim 1 , wherein the pre-selected replacement value comprises, in a time domain, at least one of a sequence of low energy samples or a sequence of max energy samples.

7. The UE of claim 1 , wherein the processor is further to:
process a complete copy of the payload portion of each of the at least one subframe within corresponding redundant copies of the at least one subframe, wherein the corresponding redundant copies are generated to enable efficient data recovery from transmission errors that occur on the uplink communication; and
supplement the uplink communication with the redundant copies of the at least one subframe as full subframes having a processed version of the complete payload portion of the at least one subframe.

8. The UE of claim 2 , wherein to process the remaining symbols of the at least one subframe comprises to compute a partial transmit orthogonal frequency division multiplexing (TX-OFDM) symbol for each of the remaining symbols of the at least one subframe, wherein each subframe not affected by the timing advance and having all symbols processed is to generate a full TX-OFDM symbol, and wherein a time to generate the partial TX-OFDM symbol is at least the value of the timing advance less than a time to generate the full TX-OFDM symbol.

9. The UE of claim 1 , wherein to reduce the duration of the at least one subframe comprises to truncate the at least one subframe by removal of at least one portion of the payload data of the at least one subframe.

10. One or more non-transitory computing device-readable media comprising computing device-executable instructions to be included in a user equipment (“UE”), wherein the instructions, in response to execution by the UE, cause the UE to:
reduce a size of at least one subframe to generate at least one reduced subframe;
replace at least a portion of payload data in the at least one reduced subframe with a pre-selected replacement value;
withhold pre-transmission processing of the at least a portion of the payload data replaced with the pre-selected replacement value;
perform the pre-transmission processing on any remaining portion of the at least one reduced subframe that is not replaced with the pre-selected replacement value; and
transmit the at least one reduced subframe via uplink communication to a base station.

11. The one or more non-transitory computing device-readable media of claim 10 , wherein to reduce the size of the at least one subframe to generate the at least one reduced subframe comprises:
to truncate the at least one subframe by removal of at least one portion of the payload data of the at least one subframe.

12. The one or more non-transitory computing device-readable media of claim 10 , wherein the instructions are further to cause the UE to:
select the at least one subframe, wherein the at least one subframe is to be scheduled for pre-transmission processing.

13. The one or more non-transitory computing device-readable media of claim 12 , wherein the instructions are further to cause the UE to:
insert a delay in a pre-transmission processing time of the at least one reduced subframe, wherein the delay is to correspond to a normal time for performance of pre-transmission processing of the full at least one subframe less an amount of a timing advance.

14. The one or more non-transitory computing device-readable media of claim 12 , wherein the instructions are further to cause the UE to:
process subframes adjacent to the at least one reduced subframe as full subframes; and
transmit the adjacent subframes via the uplink communication to the base station with the at least one reduced subframe.

15. The one or more non-transitory computing device-readable media of claim 10 , wherein the instructions are further to cause the UE to:
process a complete copy of a payload of the at least one reduced subframe within corresponding redundant copies of the at least one reduced subframe, the corresponding redundant copies to enable efficient data recovery from transmission errors; and
supplement the uplink communication with the redundant copies of the at least one reduced subframe.

16. A user equipment (UE), the UE comprising:
a processor to:
reduce a duration of at least one symbol to reduce a size of at least one subframe, a combined reduction of a duration of each reduced duration of the at least one

Assignees

• Intel Corp

Inventors

• Kim Yun H
• Larosa Christopher P
• Nollett Bryan S

Classifications

• H04W56/0045 Primary

  compensating for timing error by altering transmission time · CPC title

• H04W56/003

  Arrangements to increase tolerance to errors in transmission or reception timing · CPC title