Method and apparatus for low latency transmissions

1. A method comprising:

receiving a resource assignment;

determining a first set of time-frequency resources in a subframe from the resource assignment;

determining a second set of time-frequency resources in the subframe, the second set of time-frequency resources used for a second latency data transmission, and the second set of time-frequency resources overlapping with at least a portion of the first set of time-frequency resources; and

decoding a first latency data transmission in the subframe based on the determined first and second set of time-frequency resources, where the first latency transmission has a longer latency than the second latency transmission,

wherein the method further comprises:

determining a modulation and coding scheme value from the resource assignment; and

adjusting log likelihood ratio values of bits corresponding to first latency data transmission and mapped to the second set of time-frequency resources, only if the modulation and coding scheme value exceeds a modulation and coding scheme threshold, and

wherein decoding the first latency data transmission further comprises decoding the first latency data transmission based on adjusted log likelihood ratio.

2. The method according to claim 1 , further comprising adjusting log likelihood ratio values of bits corresponding to first latency data transmission and mapped to the second set of time-frequency resources,

wherein decoding further comprises decoding the first latency transmission in the subframe based on the adjusted log likelihood ratio.

3. The method according to claim 1 , further comprising setting to zero, log likelihood ratio values of bits corresponding to first latency data transmission and mapped to the second set of time-frequency resources,

wherein decoding the first latency data transmission further comprises decoding the first latency transmission based on the zeroed bits corresponding to first latency data transmission and mapped to the second set of time-frequency resources.

4. The method according to claim 1 , further comprising receiving a marker signal,

wherein determining the second set of time-frequency resources comprises determining the second set of time-frequency resources based on the marker signal.

5. The method according to claim 4 , further comprising determining a modulation and coding scheme value from the resource assignment,

wherein decoding comprises decoding the first latency data without accounting for the second set of resources when the modulation and coding scheme value is less than a threshold.

6. The method according to claim 4 ,

wherein the subframe comprises first subframe, and

wherein receiving the marker signal further comprises receiving the marker signal in a second subframe immediately following the first subframe.

7. The method according to claim 6 , wherein receiving the marker signal in the second subframe comprises receiving a control channel as the marker signal in the second subframe, the control channel indicating the presence of second latency data transmission in the first subframe.

8. The method according to claim 4 , wherein receiving the marker signal further comprises receiving the marker signal in the subframe containing the first set of time-frequency resources.

9. The method according to claim 8 , wherein receiving the marker signal further comprises receiving the marker signal in the at least one orthogonal frequency multiplexed symbol of the subframe.

10. The method according to claim 8 ,

wherein the first set of time-frequency resources comprises a set of resource blocks in the subframe, and

wherein receiving the marker signal further comprises receiving the marker signal in at least one resource block of the set of resource blocks.

11. The method according to claim 4 , wherein the marker signal indicates the presence or absence of second latency data transmission in the subframe.

12. The method according to claim 1 ,

wherein the subframe is a first subframe;

wherein the method further comprises receiving higher layer signalling in a subframe earlier than the first subframe, where the higher layer comprises a layer higher than a physical layer, and where the higher layer signaling indicates at least one of:

a set of orthogonal frequency multiplexed symbols where second latency data may be transmitted,

a set of resource blocks where second latency data may be transmitted,

a set of orthogonal frequency multiplexed symbols where marker signal may be transmitted, and

a set of resource elements where marker signal may be transmitted.

13. The method according to claim 1 , further comprising receiving first latency data in resources within the first set of time-frequency resources in which second latency data is not transmitted.

14. The method according to claim 1 , further comprising receiving first latency data in at least some of the resources within the first set of time-frequency resources.

15. An apparatus comprising:

a transceiver that receives a resource assignment;

a controller coupled to the transceiver, where the controller

determines a first set of time-frequency resources in a subframe from the resource assignment, and

determines a second set of time-frequency resources in the subframe, the second set of time-frequency resources used for a second latency data transmission, and the second set of time-frequency resources overlapping with at least a portion of the first set of time-frequency resources,

wherein the transceiver receives a first latency data transmission in the subframe, and

wherein the controller decodes the first latency data transmission in the subframe based on the determined first and second set of time-frequency resources, where the first latency transmission has a longer latency than the second latency transmission

wherein the controller

determines a modulation and coding scheme value from the resource assignment, and

adjusts log likelihood ratio values of bits corresponding to first latency data transmission and mapped to the second set of time-frequency resources, only if the modulation and coding scheme value exceeds a modulation and coding scheme threshold, and

wherein decoding the first latency data transmission further comprises decoding the first latency data transmission based on adjusted log likelihood ratio.

16. The method according to claim 15 , further comprising:

receiving a marker signal;

determining the second set of time-frequency resources based on the marker signal;

determining a modulation and coding scheme value from the resource assignment; and

decoding the first latency data without accounting for the second set of time-frequency resources when the modulation and coding scheme value is less than a threshold.