Low-latency, low-bandwidth and low duty cycle operation in a wireless communication system
Methods, systems, and devices are described for providing allocations and signaling for different types of communications within a wireless communication system. An eNB and/or a UE may be configured to operate within the wireless communication system using two or more different types of communications. The different types of communications may differ, for example, based on round trip time (RTT) between transmission and acknowledgment of receipt of the transmission, a transmission time interval (TTI) for wireless transmissions, and/or duty cycle timing of wireless transmissions. Reserved resources within a system bandwidth may be identified for a first type of communications, and all or a portion of remaining resources within the system bandwidth may be allocated for other communications that may differ from the first type of communications based on, for example, RTT, TTI, and/or duty cycle timing.
1. A method for wireless communication at a user equipment, comprising:
receiving an allocation of resources within a system bandwidth, the allocation comprising one or more wireless resources for a second type of data communication that are separate from one or more reserved wireless resources, within the system bandwidth, configured for a first type of data communication, wherein the first type of data communication has a first transmit time interval (TTI) and the second type of data communication has a second TTI that differs from the first TTI; and
receiving a first indication that the one or more wireless resources for the second type of data communication are configured during a second subframe that differs from a first subframe, wherein the one or more wireless resources for the second type of data communication are not configured during the first subframe.
2. The method of claim 1 , further comprising:
receiving a second indication that the one or more wireless resources for the second type of data communication are configured for the first type of data communication during the first subframe.
3. The method of claim 1 , wherein receiving the first indication comprises:
receiving the first indication that the one or more wireless resources for the second type of data communication are configured during the second subframe based at least in part on a type of data service for the second type of data communication.
4. The method of claim 1 , wherein receiving the first indication comprises:
receiving the first indication that the one or more wireless resources for the second type of data communication are configured during the second subframe based at least in part on an amount of data in a data queue for the second type of data communication.
5. The method of claim 4 , wherein receiving the first indication comprises:
receiving the first indication that the one or more wireless resources are configured for the second type of data communication based at least in part on whether the amount of data in the data queue satisfies a threshold.
6. The method of claim 1 , further comprising:
transmitting a message indicating that uplink data of the second type of data communication is to be transmitted, wherein the first indication is received based at least in part on the message.
7. The method of claim 1 , wherein receiving the first indication comprises:
receiving the first indication comprising a presence indication channel that indicates that the one or more wireless resources are configured for the second type of data communication during the second subframe.
8. The method of claim 1 , wherein receiving the first indication comprises:
receiving the first indication comprising a presence indication channel that indicates a shape or an amount for the one or more wireless resources that are configured for the second type of data communication during the second subframe.
9. The method of claim 1 , wherein the first type of data communication and the second type of data communication differ based on round trip time (RTT), and wherein:
the first type of data communication has a first subframe type with a first RTT, and
the second type of data communication has a second subframe type with a second RTT that is less than the first RTT.
10. The method of claim 1 , wherein:
the first type of data communication has a first subframe type with the first TTI, and
the second type of data communication has a second subframe type with the second TTI that is less than the first TTI.
11. The method of claim 1 , wherein the first type of data communication and the second type of data communication differ based on duty cycle timing, and wherein:
the first type of data communication is associated with a first duty cycle and utilizes either a partial or a full amount of the system bandwidth, and
the second type of data communication is associated with a second duty cycle less than the first duty cycle and utilizes a bandwidth less than the system bandwidth.
12. The method of claim 1 , wherein the second type of data communication comprises machine-type communication (MTC).
13. The method of claim 12 , wherein the one or more wireless resources comprise control and synchronization signaling sufficient for the UE to receive the second type of data communication independently of the first type of data communication.
14. An apparatus for wireless communication at a user equipment (UE), comprising:
a processor;
memory coupled to the processor; and
instructions stored in the memory, the instructions being executable by the processor to:
receive an allocation of resources within a system bandwidth, the allocation comprising one or more wireless resources for a second type of data communication that are separate from one or more reserved wireless resources, within the system bandwidth, configured for a first type of data communication, wherein the first type of data communication has a first transmit time interval (TTI) and the second type of data communication has a second TTI that differs from the first TTI; and
receive a first indication that the one or more wireless resources for the second type of data communication are configured during a second subframe that differs from a first subframe, wherein the one or more wireless resources for the second type of data communication are not configured during the first subframe.
15. The apparatus of claim 14 , wherein the instructions are further executable by the processor to:
receive a second indication that the one or more wireless resources for the second type of data communication are configured for the first type of data communication during the first subframe.
16. The apparatus of claim 14 , wherein the instructions to receive the first indication are further executable by the processor to:
receive the first indication that the one or more wireless resources for the second type of data communication are configured during the second subframe based at least in part on a type of data service for the second type of data communication.
17. The apparatus of claim 14 , wherein the instructions to receive the first indication are further executable by the processor to:
receive the first indication that the one or more wireless resources for the second type of data communication are configured during the second subframe based at least in part on an amount of data in a data queue for the second type of data communication.
18. The apparatus of claim 17 , wherein the instructions to receive the first indication are further executable by the processor to:
receive the first indication that the one or more wireless resources are configured for the second type of data communication based at least in part on whether the amount of data in the data queue satisfies a threshold.
19. The apparatus of claim 14 , wherein the instructions are further executable by the processor to:
transmit a message that uplink data of the second type of data communication is to be transmitted, wherein the first indication is received based at least in part on the message.
20. The apparatus of claim 14 , wherein the instructions to receive the first indication are further executable by the processor to:
receive the first indication comprising a presence indication channel that indicates that the one or more wireless resources are configured for the second type of data communication during the second subframe.
21. The apparatus of claim 14 , wherein the instructions to receive the first indication are further executable to cause the processor to:
receive the first indication comprising a presence indication channel that indicates a shape or an amount for the one or more wireless resources that are configured for the second type of data communication during the second subframe.
22. The apparatus of claim 14 , wherein the first type of data communication and the second type of data communication differ based on round trip time (RTT), and wherein:
the first type of data communication has a first subframe type with a first RTT, and
the second type of data communication has a second subframe type with a second RTT that is less than the first RTT.
23. The apparatus of claim 14 , wherein:
the first type of data communication has a first subframe type with the first TTI, and
the second type of data communication has a second subframe type with the second TTI that is less than the first TTI.
24. The apparatus of claim 14 , wherein the first type of data communication and the second type of data communication differ based on duty cycle timing, and wherein:
the first type of data communication is associated with a first duty cycle and utilizes either a partial or a full amount of the system bandwidth, and
the second type of data communication is associated with a second duty cycle less than the first duty cycle and utilizes a bandwidth less than the system bandwidth.
25. The apparatus of claim 14 , wherein the second type of data communication comprises machine-type communication (MTC).
26. The apparatus of claim 25 , wherein the one or more wireless resources comprise control and synchronization signaling sufficient for the UE to receive the second type of data communication independently of the first type of data communication.
27. An apparatus for wireless communication at a user equipment (UE), comprising:
means for receiving an allocation of resources within a system bandwidth, the allocation comprising one or more wireless resources for a second type of data communication that are separate from one or more reserved wireless resources, within the system bandwidth, configured for a first type of data communication, wherein the first type of data communication has a first transmit time interval (TTI) and the second type of data communication has a second TTI that differs from the first TTI; and
means for receiving a first indication that the one or more wireless resources for the second type of data communication are configured during a second subframe that differs from a first subframe, wherein the one or more wireless resources for the second type of data communication are not configured during the first subframe.
28. The apparatus of claim 27 , further comprising:
means for receiving a second indication that the one or more wireless resources for the second type of data communication are configured for the first type of data communication during the first subframe.
29. The apparatus of claim 27 , wherein the means for receiving the first indication comprises:
means for receiving the first indication that the one or more wireless resources for the second type of data communication are configured during the second subframe based at least in part on a type of data service for the second type of data communication.
30. A non-transitory computer-readable medium storing computer-executable code for wireless communication at a user equipment (UE), the code executable by a processor to:
receive an allocation of resources within a system bandwidth, the allocation comprising one or more wireless resources for a second type of data communication that are separate from one or more reserved wireless resources within the system bandwidth, configured for a first type of data communication, wherein the first type of data communication has a first transmit time interval (TTI) and the second type of data communication has a second TTI that differs from the first TTI; and
receive a first indication that the one or more wireless resources for the second type of data communication are configured during a second subframe that differs from a first subframe, wherein the one or more wireless resources for the second type of data communication are not configured during the first subframe.