Reference signal design for slot aggregation

Patent metadata

Field	Value
Publication number	US-2018317225-A1
Application number	US-201815964010-A
Country	US
Kind code	A1
Filing date	Apr 26, 2018
Priority date	Apr 28, 2017
Publication date	Nov 1, 2018
Grant date	—

Abstract

Methods, systems, and devices for wireless communication are described. The described techniques provide for configuration and transmission of reference signals over aggregated mini-slots by modifying (e.g., extending) transmission time intervals (TTIs) or sharing reference signals across multiple mini-slots. The reference signals may be shared between multiple aggregated mini-slots and a reference signal pattern may be determined based on data payload allocation, modulation coding scheme (MCS), rank, or other factors of the aggregated mini-slots. Data payloads may be scheduled jointly or separately for each mini-slot and may be allocated across a set of aggregated mini-slots.

First claim

1 . A method for wireless communication, comprising:
identifying a set of aggregated mini-slots to be used for transmission of one or more reference signals and at least one data payload; determining a reference signal configuration for transmission of the one or more reference signals via the set of aggregated mini-slots; allocating the at least one data payload to resources associated with the set of aggregated mini-slots; and transmitting, via the set of aggregated mini-slots, the one or more reference signals and the at least one data payload based at least in part on the reference signal configuration and the allocation of the at least one data payload.

2 . The method of claim 1 , wherein allocating the at least one data payload comprises:
allocating the at least one data payload across the set of aggregated mini-slots.

3 . The method of claim 1 , wherein allocating the at least one data payload comprises:
allocating each data payload of the at least one data payload to respective mini-slots of the set of aggregated mini-slots.

4 . The method of claim 1 , wherein determining the reference signal configuration comprises:
determining a reference signal pattern across the set of aggregated mini-slots.

5 . The method of claim 1 , wherein allocating the at least one data payload comprises:
allocating the at least one data payload across the set of aggregated mini-slots; and determining the reference signal configuration comprises: determining a reference signal pattern for each mini-slot of the set of aggregated mini-slots.

6 . The method of claim 1 , further comprising:
determining a degree of puncturing for at least one mini-slot of the set of aggregated mini-slots, wherein divisions of the at least one mini-slot are based at least in part on the determined degree of puncturing.

7 . The method of claim 1 , wherein allocating the at least one data payload comprises:
allocating each data payload of the at least one data payload to respective mini-slots of the set of aggregated mini-slots; and determining the reference signal configuration comprises: determining a reference signal pattern across the set of aggregated mini-slots, wherein the reference signal pattern is shared between multiple mini-slots of the set of aggregated mini-slots.

8 . The method of claim 7 , wherein a reference signal waveform for a first mini-slot of the set of aggregated mini-slots is different than the reference signal waveform for a second mini-slot of the set of aggregated mini-slots.

9 . The method of claim 7 , further comprising:
identifying at least one grant that comprises information common to multiple mini-slots of the set of aggregated mini-slots, wherein downlink control information (DCI) corresponding to the multiple mini-slots is based at least in part on the information common to the multiple mini-slots.

10 . The method of claim 9 , further comprising:
identifying the at least one grant is based at least in part on identification of an indicator that points to the at least one grant.

11 . The method of claim 10 , wherein the indicator that points to the at least one grant is included in the DCI corresponding to the multiple mini-slots.

12 . The method of claim 9 , wherein the information common to the multiple mini-slots comprises a waveform characteristic, a resource block allocation, a rank, or a combination thereof.

13 . The method of claim 9 , wherein the DCI comprises one or more shortened fields corresponding to the information common to the multiple mini-slots.

14 . The method of claim 9 , wherein the at least one grant consists of a single grant.

15 . The method of claim 9 , wherein the reference signal configuration for the multiple mini-slots is determined based at least in part on the DCI corresponding to the multiple mini-slots.

16 . The method of claim 7 , further comprising:
determining one or more scheduling parameters for each mini-slot of the set of aggregated mini-slots and a separation between at least two mini-slots of the set of aggregated mini-slots, wherein the reference signal configuration is determined based at least in part on the scheduling parameter and the separation.

17 . The method of claim 7 , further comprising:
determining whether to share the reference signal pattern between two mini-slots of the set of aggregated mini-slots based at least in part on one or both of a time separation and a frequency separation between the two mini-slots.

18 . The method of claim 7 , wherein a plurality of mini-slots of the set of aggregated mini-slots are contiguous and have the same resource allocation.

19 . The method of claim 1 , wherein allocating the at least one data payload comprises:
allocating the at least one data payload across the set of aggregated mini-slots and based at least in part on a single grant message; and determining the reference signal configuration comprises: determining a reference signal pattern across the set of aggregated mini-slots, wherein the reference signal pattern is shared between multiple mini-slots of the set of aggregated mini-slots.

20 . The method of claim 19 , further comprising:
determining, based at least in part on the single grant message, one or more scheduling parameters common to multiple mini-slots of the set of aggregated mini-slots, wherein the reference signal pattern is based at least in part on the one or more scheduling parameters.

21 . The method of claim 19 , wherein the allocation of the at least one data payload or the determination of the reference signal configuration is based at least in part on a modulation and coding scheme (MCS) for each mini-slot of the set of aggregated mini-slots, and wherein the MCS for a first mini-slot is different than the MCS for a second mini-slot.

22 . The method of claim 1 , further comprising:
encoding the set of aggregated mini-slots based at least in part on a frequency-first mapping scheme or a time-first mapping scheme, wherein transmission of the one or more reference signals and the at least one data payload is based at least in part on the encoding.

23 . The method of claim 1 , further comprising:
scheduling each of the set of aggregated mini-slots via respective grant messages or via a single grant message.

24 . The method of claim 1 , wherein a first mini-slot of the set of aggregated mini-slots has a bandwidth different from a second mini-slot of the set of aggregated mini-slots.

25 . The method of claim 1 , wherein the reference signal configuration is determined based at least in part on a spectral efficiency, a number of resource elements (REs), a transport block size (TBS), a ratio of TBS and number of REs, or any combination thereof of one or more mini-slots of the set of aggregated mini-slots.

26 . The method of claim 1 , wherein the reference signal configuration is determined based at least in part on a modulation and coding scheme (MCS) for each mini-slot of the set of aggregated mini-slots.

27 . The method of claim 1 , wherein the allocation of the at least one data payload is based at least in part on a modulation and coding scheme (MCS) for each mini-slot of the set of aggregated mini-slots, and wherein the MCS for a first mini-slot of the set of aggregated mini-slots is different than the MCS for a second mini-slot of the set of aggregated mini-slots.

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Assignees

• Qualcomm Inc

Inventors

• Akkarakaran Sony
• Luo Tao
• Wang Xiao Feng
• John Wilson Makesh Pravin
• Nagaraja Sumeeth
• Chakraborty Kaushik
• Nam Wooseok
• Chen Shengbo

Classifications

• H04W72/23

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

• H04L5/0051 Primary

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04L5/0005

  Time-frequency · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L5/0053

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