Method and DEVICE in user equipment and base station used for wireless communication

A technology of wireless communication and user equipment, which is applied in the field of data and control channel transmission on unlicensed spectrum, and can solve the problems of not knowing whether LBT can pass, and being unable to correctly predict whether PDCCH can be sent.

Active Publication Date: 2019-12-17
SHANGHAI LANGBO COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the LAA (License Assisted Access) design mechanism of LTE, the transmitter (base station or user equipment) needs to perform LBT (Listen Before Talk) before sending data on the unlicensed spectrum to ensure that Other ongoing wireless transmissions on the unlicensed spectrum cause interference. In the current NR system, the CORESET (Control Resource Set, Control Resource Set) used to transmit PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) is all through RRC (Radio Resource Control, radio resource control) signaling configuration, due to the existence of LBT, the base station does not know whether the LBT can pass before sending the PDCCH, that is, the base station cannot correctly predict whether the PDCCH can be sent before completing the LBT

Method used

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  • Method and DEVICE in user equipment and base station used for wireless communication
  • Method and DEVICE in user equipment and base station used for wireless communication
  • Method and DEVICE in user equipment and base station used for wireless communication

Examples

Experimental program
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Effect test

Embodiment 1

[0092] Embodiment 1 has illustrated the flowchart of the first sequence, as attached figure 1 shown.

[0093] In Embodiment 1, the user equipment in this application first monitors the first sequence in the first time window; if the first sequence is detected in the first time window, the user equipment then Blind detection for the first signaling is performed on K1 candidate RE sets; the first signaling occupies one candidate RE set in the K1 candidate RE sets in the time-frequency domain, and the K1 candidate RE sets Any one of the candidate RE sets in the RE set includes a positive integer number of REs, and each RE included in any one of the K1 candidate RE sets belongs to the candidate time-frequency resource pool, and the candidate The selected time-frequency resource pool belongs to a second time window in the time domain, the first sequence is used to determine the starting moment of the candidate time-frequency resource pool in the second time window, and the first t...

Embodiment 2

[0122] Embodiment 2 illustrates the schematic diagram of network architecture, as attached figure 2 shown.

[0123] Embodiment 2 illustrates a schematic diagram of a network architecture according to the present application, as attached figure 2 shown. figure 2It is a diagram illustrating NR5G, LTE (Long-Term Evolution, long-term evolution) and LTE-A (Long-Term Evolution Advanced, enhanced long-term evolution) system network architecture 200 . The NR 5G or LTE network architecture 200 may be referred to as an EPS (Evolved Packet System, Evolved Packet System) 200 by some other suitable term. EPS 200 may include one or more UE (User Equipment, user equipment) 201, NG-RAN (next generation radio access network) 202, 5G-CN (5G-Core Network, 5G core network) / EPC (Evolved Packet Core, Evolved Packet Core) 210 , HSS (Home Subscriber Server, Home Subscriber Server) 220 and Internet Service 230 . The EPS may be interconnected with other access networks, but these entities / interf...

Embodiment 3

[0129] Embodiment 3 shows a schematic diagram of an embodiment of a wireless protocol architecture of a user plane and a control plane according to the present application, as shown in the attached image 3 shown.

[0130] attached image 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane and a control plane, image 3 The radio protocol architecture for user equipment (UE) and base station equipment (gNB or eNB) is shown in three layers: layer 1, layer 2 and layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (Physical Layer) signal processing functions. The L1 layer will be referred to herein as PHY 301 . Layer 2 (L2 Layer) 305 is above PHY 301 and is responsible for the link between UE and gNB through PHY 301 . In the user plane, the L2 layer 305 includes MAC (Medium Access Control, Media Access Control) sublayer 302, RLC (Radio LinkControl, Radio Link Layer Control Protocol) sublayer 303 and PDCP ...

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Abstract

The invention discloses a method and a device in user equipment and a base station used for wireless communication. The user equipment monitors the first sequence in a first time window; if the firstsequence is detected in the first time window,blind detection for first signaling is executed on K1 alternative RE sets; the first signaling occupies one of the K1 alternative RE sets in a time-frequency domain; each RE included in the K1 alternative RE sets belongs to an alternative time-frequency resource pool, the alternative time-frequency resource pool belongs to a second time window in the time domain, and the first sequence is used for determining the starting time of the alternative time-frequency resource pool in the second time window. According to the method, the starting time of the alternative time-frequency resource pool is determined by adopting the first sequence, so that the sending opportunity of the control signaling is improved on the premise of not increasing the blinddetection frequency of the user equipment, and the spectrum efficiency and the overall performance of the system are improved on the unauthorized spectrum.

Description

technical field [0001] The present application relates to a transmission method and device in a wireless communication system, in particular to a method and device for data and control channel transmission on an unlicensed frequency spectrum. Background technique [0002] In a traditional 3GPP (3rd Generation Partner Project, third-generation partnership project) LTE (Long-term Evolution, long-term evolution) system, data transmission can only occur on licensed spectrum. However, with the continuous diversification of application scenarios and the sharp increase of traffic volume, the traditional licensed spectrum may be difficult to meet the demand of traffic volume. In LTE Release 13 and Release 14, the communication on the unlicensed spectrum is introduced by the cellular system and used for downlink and uplink data transmission. [0003] In the LAA (License Assisted Access) design mechanism of LTE, the transmitter (base station or user equipment) needs to perform LBT (L...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/08H04L5/00
CPCH04L5/0094H04L5/0053H04W72/0453H04W72/0446H04L5/0007H04L27/2602H04W72/20H04W72/542H04W72/23H04W74/0816H04L5/001H04W72/12
Inventor 蒋琦张晓博杨林
Owner SHANGHAI LANGBO COMM TECH CO LTD
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