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Rach procedures in unlicensed spectrum

A technology of subframe and receiving unit, which is applied in the field of RACH process in unlicensed spectrum, and can solve problems such as restrictions on the use of unlicensed spectrum

Active Publication Date: 2020-04-10
INTERDIGITAL PATENT HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unlicensed spectrum can be shared by multiple users that may interfere with each other, which can create constraints on the use of unlicensed spectrum

Method used

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  • Rach procedures in unlicensed spectrum
  • Rach procedures in unlicensed spectrum
  • Rach procedures in unlicensed spectrum

Examples

Experimental program
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Embodiment Construction

[0023] The detailed description of the illustrative embodiments will now be described with reference to the various drawings. While such description provides detailed examples of possible implementations, it should be noted that these details are intended to be exemplary, and in no way limit the scope of the application.

[0024] Figure 1A is a diagram illustrating an example communication system 100 in which one or more of the disclosed embodiments may be implemented. Communication system 100 may be a multiple access system that provides content, such as voice, data, video, messaging, broadcast, etc., to multiple wireless users. Communication system 100 may enable multiple wireless users to access such content by sharing system resources, including wireless bandwidth. For example, communication system 100 may employ one or more channel access methods, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA...

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Abstract

Systems, methods, and instrumentalities are disclosed for Random Access Channel (RACH) procedures in unlicensed spectrum. A wireless transmit / receive unit (WTRU) may monitor for a random access response (RAR) or a reference signal (RS), e.g. in an RAR window. The WTRU may determine whether an RS has been received a threshold amount of times, e.g. if an RAR is not received. The WTRU may continue tomonitor for an RAR or an RS, e.g. if the RS has not been received a threshold amount of times and the RAR window is not at a maximum RAR window size.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims the benefit of US Provisional Application Serial No. 62 / 519,535, filed June 14, 2017; and US Provisional Application Serial No. 62 / 590,875, filed November 27, 2017. The entire contents of these two US provisional patent applications are incorporated herein by reference. Background technique [0003] Mobile communications continue to evolve. The fifth generation can be called 5G. The previous (legacy) generation of mobile communication may be, for example, the fourth generation (4G) Long Term Evolution (LTE). Mobile wireless communications implement various Radio Access Technologies (RATs), such as New Radio (NR). Use cases for NR may include, for example, extreme mobile broadband (eMBB), ultra-reliable and low-latency communications (URLLC), and massive machine-type communications (mMTC). [0004] Wireless communication can support applications with different requirements. For example, some ap...

Claims

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Application Information

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IPC IPC(8): H04W74/08
CPCH04W74/0833H04L5/001H04L5/0048H04W74/0808H04L27/0006H04W4/00H04W4/02H04W4/027H04W4/70H04W52/50H04W74/008H04W74/004H04L43/18H04W24/08
Inventor 阿纳布·罗伊珍妮特·A·斯特恩-波科维茨J·帕特里克·土赫阿尔帕斯兰·德米尔李文一穆罕默德·U·费齐利凯文·T·瓦努加桑杰·戈亚尔米哈埃拉·C·贝卢里斯科特·M·牛顿
Owner INTERDIGITAL PATENT HLDG INC