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Radio communications using random access in wireless networks

A wireless network, random access technology, applied in wireless communication, network planning, radio transmission system, etc., can solve the problem of high path loss of communication signals

Active Publication Date: 2019-12-06
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Communication signals at such high frequencies suffer from very high path loss

Method used

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  • Radio communications using random access in wireless networks
  • Radio communications using random access in wireless networks
  • Radio communications using random access in wireless networks

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Embodiment Construction

[0054] This disclosure relates to technologies for wireless communications, including but not limited to 5G wireless communications using random access procedures utilizing micro and millimeter waves. In a random access system, a user equipment (user equipment, UE) sends a random access channel (RACH) signal and receives a random access response (RAR) in order to establish a connection with a base station. An efficient random access procedure is provided for reducing the control overhead associated with establishing a connection in a random access system. The disclosed techniques may be used in microwave and millimeter wave spectrum wireless systems, but are not limited thereto. In one embodiment, the disclosed techniques are used with beamforming transmissions to overcome higher path loss. Beamforming can be applied not only to user equipment (UE)-specific downlink and uplink data transmissions, but also to common channels such as synchronization and control channels on the ...

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Abstract

An efficient random access procedure is provided for reduced control overhead of connections in random access systems. A base station transmits one or more synchronization signal (SS) blocks. A UE detects and determines a preferred SS block. The UE transmits multiple random access signals (e.g., PRACH signals) in a RACH occasion. Each PRACH signal is transmitted on a different beam and includes aRACH preamble. The base station receives one or more of the PRACH signals. The RACH occasion and optionally the RACH preamble identify the preferred SS block. The base station determines a preferred PRACH signal. The base station sends a RAR to the UE using the transmit beam of the preferred SS block. The RAR indicates the preferred PRACH signal and an uplink resource allocation. The UE receives the RAR and transmits a message using the transmit beam of the preferred PRACH signal and the uplink resource allocation.

Description

[0001] claim priority [0002] This application claims priority to U.S. Provisional Application 62 / 521,216, filed June 16, 2017, and U.S. Nonprovisional Application 16 / 008,783, filed June 14, 2018, the contents of which are hereby incorporated by reference. technical field [0003] The present application relates generally to wireless communications, including wireless communications using random access procedures. Background technique [0004] Wireless links connect mobile phones and other devices to cellular networks, which also connect to the Internet, providing basic voice communications and a variety of other services such as text messaging, e-mail, Internet access, and other business applications. Typical wireless coverage ranges for mobile phone applications range from a few hundred meters in small cell applications to several miles in macro cell applications in rural areas. Wireless local area networks, known as "WiFi," enable portable computing devices such as lapt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/28
CPCH04W56/001H04W72/046H04W74/006H04W74/0833H04L5/0053H04B7/0695H04B7/088H04W74/0838
Inventor 穆拉利·纳拉辛哈肖维民程谦刘嘉陵维普尔·德赛
Owner HUAWEI TECH CO LTD
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