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Signal transmission method and equipment

A technology for signal transmission and synchronization of signals, applied in the field of mobile communications

Active Publication Date: 2018-07-13
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a 5G system, for a terminal with a small bandwidth, the PUCCH may not be located at the edge of the entire system bandwidth, so it may overlap with the SRS bandwidth

Method used

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  • Signal transmission method and equipment
  • Signal transmission method and equipment
  • Signal transmission method and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Step 101: The UE detects a synchronization signal and a broadcast channel for initial access, and determines the time-frequency resource of the synchronization signal for initial access and the broadcast channel.

[0081] The initial access synchronization signal at least includes a synchronization signal for determining initial time-frequency synchronization and / or cell ID. For example, PSS / SSS.

[0082] Preferably, the broadcast channel PBCH of the initial access process may include information for determining frame index numbers, and / or information required for random access, and / or information required for determining basic system messages, and and / or the content of information related to the beam configuration.

[0083] Preferably, the center frequency of the synchronization signal used for initial access and the broadcast channel may coincide with the carrier center frequency of the serving cell, or may be offset relative to the carrier center frequency of the se...

example 1

[0115] The second type of system information is sent in the PBCH. The system bandwidth of the serving cell is 40MHz, and the bandwidth for sending PSS / SSS / PBCH is 5MHz. Suppose the reference subcarrier spacing = 15KHz, such as Figure 4 As shown, the PSS / SSS / PBCH is located in the 10th to 34th RBs within the system bandwidth. Assuming that the demodulation reference symbol of PBCH is RS1, there is only 1 reference symbol in each slot, and there are 3 subcarriers in each RB as reference symbols, then the sequence r(m) of RS1 is r(0),r (1)...r(74). And the reference symbols in the 1st to 25th RBs within the 5MHz bandwidth are r(0)~r(2), ...r(72)~r(74) respectively. It should be noted that the label j of the RB in the entire system bandwidth is often not equal to the label i in the 5 MHz bandwidth. The second type of system information in the PBCH indicates that the center of the time-frequency resource where the PSS / SSS / PBCH is located is offset by 78 RBs relative to the cen...

example 2

[0117] The second type of system information is sent in SIB1. The system bandwidth of the serving cell is 40MHz, the available bandwidth for sending PSS / SSS / PBCH is 5MHz, and the time-frequency resource set 20MHz for sending SIB1 is fixed to 20MHz centered on 5MHz of PSS / SSS / PBCH. Assuming that the reference subcarrier spacing=15KHz, the 5MHz is located in the 50-74 RBs within the system bandwidth, and the 20MHz is located in the 13th-112th RBs within the system bandwidth. When performing initial access, the terminal needs to detect PSS / SSS / PBCH, then determine the time-frequency resource set of SIB1, and detect SIB1 in the time-frequency resource set. PBCH contains information that can be used for random access procedures. The terminal may perform random access first, and then read SIB1. Then, the demodulation reference signal of PBCH, the demodulation reference signal of PDSCH or PDCCH used in msg2 and msg4 in the random access process, and the demodulation reference signa...

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Abstract

The invention provides a signal transmission method which comprises the steps of: in the initial access process, according to a synchronization signal and / or a broadcast channel, determining a time-frequency resource for sending a first category of system information and a second category of system information; according to the time-frequency resource, determining a reference symbol sequence for demodulating the first category of system information and the second category of system information; and according to information indicated by the second category of system information, determining a reference symbol sequence after demodulating out the second category of system information.

Description

technical field [0001] The present application relates to the technical field of mobile communication, and in particular, the present application relates to a reference signal transmission method and device. Background technique [0002] With the rapid development of the information industry, especially the growing demand from the mobile Internet and the Internet of Things (IoT, internet of things), it brings unprecedented challenges to future mobile communication technologies. For example, according to the report ITU-R M.[IMT.BEYOND 2020.TRAFFIC] of the International Telecommunication Union ITU, it can be predicted that by 2020, the growth of mobile traffic will increase by nearly 1,000 times compared to 2010 (4G era), and the number of user equipment connections will also increase. It will exceed 17 billion. As massive IoT devices gradually penetrate into mobile communication networks, the number of connected devices will become even more astonishing. In response to this ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00
CPCH04L5/0048H04J11/0069H04W48/12H04W56/00H04L5/0044H04L5/0053Y02D30/70H04W72/044H04W48/08H04W72/20H04B7/0626H04L5/0005H04W56/001H04W72/0446H04W72/0453H04W80/02H04W72/30H04W72/23
Inventor 王轶张世昌李迎阳
Owner BEIJING SAMSUNG TELECOM R&D CENT