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Random access signal sending method and device

A technology of random access signal and transmission method, applied in the field of communication, can solve the problems such as the inability to establish services, the terminal equipment cannot meet the requirements of the protocol PC2, and the success of random access cannot be guaranteed, and the effect of improving the success rate is achieved.

Active Publication Date: 2020-06-05
HUAWEI TECH CO LTD
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  • Claims
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Problems solved by technology

[0004] This application provides a method and device for sending random access signals, which are used to solve the problem that the terminal equipment of PC2 cannot meet the requirements of the protocol PC2 when transmitting PRACH, so that random access cannot be guaranteed successfully, and the service may not be established.

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  • Random access signal sending method and device
  • Random access signal sending method and device
  • Random access signal sending method and device

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Embodiment Construction

[0043] In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings.

[0044] The embodiments of the present application may be applied in a communication system, where the communication system includes an access network device and a terminal device. The communication system may be a single-input multiple-output (SIMO) system or a multiple-input multiple-output (MIMO) system, wherein the access network device in the SIMO system includes an antenna, A terminal device includes multiple antennas. In the MIMO system, the access network equipment includes multiple antennas, and the terminal equipment also includes multiple antennas. The communication system involved in the embodiment of the present application can support various communication systems, for example, it can be a long term evolution (longterm evolution, LTE) communication system, it c...

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Abstract

A random access signal sending method and device are used for solving the problem that a terminal device of a PC2 cannot meet the requirement of a protocol PC2 when transmitting a PRACH (Physical Random Access Channel), so that the success of random access cannot be ensured. The method comprises the steps that a phase difference matrix is determined, wherein the phase difference matrix comprises nphase differences, the ith phase difference is the phase difference between a channel corresponding to the ith first antenna port and a channel corresponding to the second antenna port, the second antenna port is any antenna port in the terminal equipment, and i is a positive integer not larger than n. Then, a precoding matrix is determined based on the phase difference matrix. Precoding processing is carried out on the random access signal based on the precoding matrix to obtain n to-be-sent signals, and the n to-be-sent signals are sent to the access network device through the n first antenna ports respectively.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a method and device for sending a random access signal. Background technique [0002] The new air interface (new radio, NR) agreement stipulates that when working in the frequency range (frequency range 1, FR1) defined in the NR agreement in the 450MHz ~ 6000MHz, for uplink use power class 2 (power class 2, PC2) terminal , the maximum uplink transmission power needs to reach 26dBm. To support uplink multiple input multiple output (MIMO), the terminal will be configured with multiple transmit antennas, and each antenna has a power amplifier (power amplifier, PA) with a maximum transmit power of 23 dBm. [0003] When the terminal transmits the physical uplink shared channel (PUSCH), it supports the uplink MIMO transmission mode, that is, the PUSCH is sent simultaneously through multiple antennas, so the maximum transmission power can reach 26dBm, which meets...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/00H04W74/08H04B7/0456
CPCH04W74/004H04W74/006H04W74/0833H04W74/0866H04B7/0456H04W74/0841
Inventor 金乐龚卫林彭炳光丁仁天
Owner HUAWEI TECH CO LTD
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