	US 12,107,782 B2
	Method and device for determining reference signal, method and device for determining control channel unit, and storage medium
Jing Shi, Shenzhen (CN); Shuqiang Xia, Shenzhen (CN); Wen Zhang, Shenzhen (CN); Chunli Liang, Shenzhen (CN); Xianghui Han, Shenzhen (CN); and Min Ren, Shenzhen (CN)
Assigned to ZTE CORPORATION, Shenzhen (CN)
Appl. No. 16/753,376
Filed by ZTE CORPORATION, Shenzhen (CN)
PCT Filed Oct. 31, 2018, PCT No. PCT/CN2018/113117 § 371(c)(1), (2) Date Apr. 3, 2020, PCT Pub. No. WO2019/085953, PCT Pub. Date May 9, 2019.
Claims priority of application No. 201711050997.1 (CN), filed on Oct. 31, 2017.
Prior Publication US 2020/0336268 A1, Oct. 22, 2020
Int. Cl. H04L 5/00 (2006.01); H04L 5/10 (2006.01); H04L 27/26 (2006.01); H04W 72/50 (2023.01)

CPC H04L 5/0048 (2013.01) [H04L 5/0051 (2013.01); H04L 5/0082 (2013.01); H04L 5/10 (2013.01); H04L 27/261 (2013.01); H04L 27/2613 (2013.01); H04W 72/535 (2023.01); H04L 27/26136 (2021.01)]

16 Claims

1. A method for determining a reference signal, comprising:

determining, in a preset manner of a signaling indicating a reference signal pattern in each N short transmission time intervals (TTIs), that the reference signal exists in at least one of each N short TTIs in a semi-persistent scheduling (SPS) transmission, wherein a time domain position of the reference signal is unfixed in the short TTIs, and N is a positive integer,

wherein when the signaling is physical layer signaling with different usages for SPS of different SPS transmission periods, the signaling is for indicating the reference signal pattern in each N short TTIs when an SPS transmission period is one short TTI, and all bits corresponding to the signaling are set to 0 for validation of an activation or a deactivation of the SPS transmission when an SPS transmission period is larger than one short TTI.

11. A method for determining a control channel element (CCE), comprising:

selecting part of N resource element groups (REGs) to constitute the CCE in at least one of the following manners:

for a physical downlink control channel (PDCCH) based on a demodulation reference signal (DMRS), when a mapping between the CCE and the REGs is a distributed mapping, a following principle is at least satisfied: a group of M REGs at equal intervals or discrete intervals in a frequency domain constitute the CCE, wherein M is a number of REGs included in K resource blocks (RBs) in a transmission time interval (TTI), and K and N are both positive integers; or

for a PDCCH based on a cell reference signal (CRS), when a mapping between the CCE and the REGs is a distributed mapping, a following principle is at least satisfied: in a single symbol, a group of REGs at equal intervals or discrete intervals in the frequency domain constitute the CCE,

wherein when in the single symbol the group of REGs at equal intervals or discrete intervals in the frequency domain constitute the CCE used for a short PDCCH (sPDCCH), indexes of short REGs (sREGs) constituting a short CCE (sCCE) #n are determined in at least one of the following manners:

wherein n=0, . . . , N_sCCE,p−1, N_sCCE,pdenotes a number of sCCEs in a control channel RB set p, i=0, . . . , N_sREG^sCCE−1, N_sREG^sCCEdenotes a number of sREGs included in each sCCE, and N_sREG^symbdenotes a number of sREGs included in each orthogonal frequency division multiplexing (OFDM) symbol in the control channel RB set p.

16. A device for determining a reference signal, comprising a processor and a storage device, wherein the storage device stores processor-executable programs, and the programs comprise:

a determining module, which is configured to determine, in a preset manner of a signaling indicating a reference signal pattern in each N short transmission time intervals (TTIs), that the reference signal exists in at least one of each N short TTIs in a semi-persistent scheduling (SPS) transmission, wherein a time domain position of the reference signal is unfixed in the short TTIs, and N is a positive integer,