Strategic mapping of uplink resources

Patent metadata

Field	Value
Publication number	US-2018367283-A1
Application number	US-201815975638-A
Country	US
Kind code	A1
Filing date	May 9, 2018
Priority date	Jun 16, 2017
Publication date	Dec 20, 2018
Grant date	—

Abstract

Aspects of the disclosure relate to implied and explicit mapping of uplink (UL) resources for acknowledgment communications from a user equipment (UE). In some examples disclosed herein, implied mapping may include indexing of information elements in a downlink (DL) communication. The explicit mapping may include information elements in the DL communication configured to explicitly provide a location of an UL resource. Other aspects, embodiments, and features are also claimed and described.

First claim

What is claimed is:

1 . A method of wireless communication operable at a scheduled entity, the method comprising:
receiving a downlink (DL) transmission comprising a control channel element (CCE) having a CCE index; generating an acknowledgment (ACK) for transmission in response to the DL transmission; mapping the ACK to a first UL resource corresponding to the CCE index and a first parameter; and transmitting the ACK utilizing the first UL resource.

2 . The method of claim 1 , wherein the first parameter comprises a control resource set (CORESET) index of the DL transmission.

3 . The method of claim 2 , wherein an UL channel comprises a first resource pool corresponding to the CORESET index, and wherein the first resource pool comprises the first UL resource corresponding to the CCE index, indexed by the CORESET index.

4 . The method of claim 3 , further comprising receiving signaling identifying a relationship between:
the first resource pool and the CORESET index, and the first UL resource and the CCE index.

5 . The method of claim 1 , wherein the first parameter comprises information specific to the scheduled entity, the information including one or more of a radio network temporary identifier (RNTI) or a scrambling identification (SCID).

6 . The method of claim 5 , wherein the first parameter comprises an explicit information element included in DL control information (DCI).

7 . The method of claim 1 , wherein the DL transmission further comprises DL control information (DCI) having an information element configured to indicate an offset value, and wherein mapping the ACK further comprises applying the offset value to the first UL resource to generate a modified UL resource for transmitting the ACK.

8 . The method of claim 7 , further comprising:
receiving a radio resource control (RRC) message mapping the information element to the offset value, wherein the offset value is configured to offset the first UL resource in one or more of a frequency domain, a code domain, a cyclic shift domain, or a time domain; and storing the information element and the offset value in a memory device.

9 . The method of claim 1 , further comprising:
receiving another DL transmission comprising DL control information (DCI) having an information element indicative of a second UL resource, wherein the information element is configured to override the mapping of the ACK to the first UL resource; and transmitting the ACK utilizing the second UL resource.

10 . The method of claim 9 , wherein the other DL transmission comprises an ACK grant configured to provide one or more of an address or an index indicative of the second UL resource.

11 . An apparatus configured for wireless communication, comprising:
a memory device; a transceiver; and at least one processor communicatively coupled to the memory device and the transceiver, configured to: receive a downlink (DL) transmission comprising a control channel element (CCE) having a CCE index via the transceiver; generate an acknowledgment (ACK) in response to the DL transmission; map the ACK to a first uplink (UL) resource corresponding to the CCE index and a first parameter; and transmit the ACK utilizing the first UL resource via the transceiver.

12 . The apparatus of claim 11 , wherein the first parameter comprises a control resource set (CORESET) index of the DL transmission.

13 . The apparatus of claim 12 , wherein an UL channel comprises a first resource pool corresponding to the CORESET index, and wherein the first resource pool comprises the first UL resource corresponding to the CCE index, indexed by the CORESET index.

14 . The apparatus of claim 13 , wherein the at least one processor is further configured to receive signaling identifying a relationship between:
the first resource pool and the CORESET index, and the first UL resource and the CCE index.

15 . The apparatus of claim 11 , wherein the at least one processor is further configured to receive information specific to a scheduled entity receiving the DL transmission, wherein the information comprises one or more of a radio network temporary identifier (RNTI) or a scrambling identification (SCID), and wherein the first parameter comprises the information specific to the scheduled entity.

16 . The apparatus of claim 11 , wherein the DL transmission further comprises DL control information (DCI) having a bit configured to indicate an offset value, and wherein mapping the ACK further comprises applying the offset value to the first UL resource to generate a modified UL resource for transmitting the ACK.

17 . The apparatus of claim 16 , wherein the at least one processor is further configured to:
receive a radio resource control (RRC) message mapping the bit to the offset value, wherein the offset value is configured to offset the first UL resource in one or more of a frequency domain, a code domain, a cyclic shift domain, or a time domain; and store the bit and the offset value in the memory device.

18 . The apparatus of claim 11 , wherein the at least one processor is further configured to:
receive another DL transmission comprising DL control information (DCI) having an information element indicative of a second UL resource, wherein the information element is configured to override the mapping of the ACK to the first UL resource; transmit the ACK utilizing the second UL resource.

19 . The apparatus of claim 18 , wherein the other DL transmission comprises an ACK grant configured to provide one or more of an address or an index indicative of the second UL resource.

20 . A method of wireless communication operable at a scheduling entity, the method comprising:
selecting a first uplink (UL) resource for an acknowledgment (ACK), the first UL resource corresponding to a first parameter and a CCE index; communicating a downlink (DL) transmission comprising a CCE having the CCE index to a scheduled entity; and receiving an ACK communicated via the first UL resource in response to the DL transmission from the scheduled entity.

21 . The method of claim 20 , wherein the first parameter comprises a control resource set (CORESET) index of a CORESET of the DL transmission.

22 . The method of claim 21 , wherein an UL channel comprises a plurality of resource pools including a first resource pool comprising the first UL resource, the method further comprising mapping the first UL resource pool to the CORESET index, and mapping the first UL resource to the CCE index, indexed by the CORESET index.

23 . The method of claim 22 , further comprising communicating to the scheduled entity the mapping between:
the first resource pool and the CORESET index, and the first UL resource and the CCE index.

24 . The method of claim 22 , wherein each resource pool of the plurality of resource pools corresponds to a portion of a bandwidth of the UL channel.

25 . The method of claim 21 , wherein the CORESET comprises a first bandwidth that is sized based on an amount of bandwidth of the DL transmission that the scheduled entity can monitor.

26 . The method of claim 22 , wherein the UL resource is selected based on a number of scheduled entities in a cell.

27 . The method of claim 20 , further comprising:
communicating an UL resource override configured to override the first UL resource and explicitly assign a second UL resou

Assignees

• Qualcomm Inc

Inventors

• Huang Yi
• Wang Renqiu
• Xu Hao
• Park Seyong

Classifications

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title