A kind of transmission method and device of uplink reference signal

A technology for a reference signal and a transmission method, applied in the field of uplink reference signal transmission methods and devices, can solve the problems of partial interference of reference measurement signal data, destruction of uplink measurement reference signal time domain orthogonality, lack of beam detection, etc. The effect of data transmission accuracy

Active Publication Date: 2020-02-21
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] Q1: Although the terminal and the low-frequency macro station ( figure 1 The middle eNB) has completed the time synchronization and uplink timing advance process, namely figure 1 The clock on the network side and the signal sent by the UE to the eNB are aligned in time, but when the result is reused on the micro station, the uplink transmission signals of different terminals (UE1 and UE2 in the figure) arrive at a certain micro station (TP1 in the figure) There is a random delay difference, which will destroy the orthogonality of the uplink measurement reference signal in the time domain, and also cause interference to the data part of the reference measurement signal
[0014] Q2: On the other hand, even for a single terminal (UE1 in the figure), the result of time alignment with the macro station is multiplexed to the micro station (TP1 in the figure), and the low-frequency macro station will be caused by the different propagation distances of the paths. There is a delay difference between the high-frequency micro-station and the high-frequency micro-station. This delay difference will lead to the lack of beam detection, so that the reference signal sent by a certain beam cannot be completely received.
[0015] Therefore, in the HetNet hybrid networking scenario where the micro-station is a high-frequency base station and the macro-station is a low-frequency base station, the synchronization between the terminal and the low-frequency macro station and the TA in the prior art cannot be reused between the terminal and the high-frequency micro-station. The problem that the uplink reference signal cannot be transmitted correctly, how to design an uplink reference signal transmission scheme to ensure the transmission accuracy of the uplink reference signal is an urgent problem to be solved

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  • A kind of transmission method and device of uplink reference signal
  • A kind of transmission method and device of uplink reference signal
  • A kind of transmission method and device of uplink reference signal

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Embodiment 1

[0112] Such as Figure 8 As shown, the first embodiment provides an application figure 2 The shown high-frequency micro-site and low-frequency macro-site hybrid networking or Figure 7 The shown frame structure in a communication system in which multiple high-frequency base stations are mixed and networked. Among them, the high-frequency base station in the mixed networking scenario of multiple high-frequency base stations may be a high-frequency micro station or a high-frequency macro station.

[0113] Figure 8 In, 10 milliseconds is used as the frame length of a radio frame; the radio frame is composed of 10 radio subframes with a frame length of 1 millisecond; and a radio subframe is divided into 8 radio subframes with a length of 0.125 milliseconds. The time slot (time slot); where each time slot is composed of Q symbols, which can be single-carrier symbols or multi-carrier symbols, such as OFDM symbols. A typical Q value can be set to 7n, where n is a positive integer. Th...

Embodiment 2

[0116] Such as Figure 9A with Figure 9B As shown, the second embodiment gives another application figure 2 The shown high-frequency micro-site and low-frequency macro-site hybrid networking or Figure 7 The shown frame structure in a communication system in which multiple high-frequency base stations are mixed and networked. Among them, the high-frequency base station in the mixed networking scenario of multiple high-frequency base stations may be a high-frequency micro station or a high-frequency macro station.

[0117] Such as Figure 9A As shown, the difference from the first embodiment is that since the uplink reference signal is not continuous in time domain resources, the NoMP interval for transmitting the uplink reference signal is also distributed, and the NoMP interval is divided into several NoMP segments.

[0118] Figure 9B In, 10 milliseconds is used as the frame length of a radio frame; the radio frame is composed of 10 radio subframes with a frame length of 1 milli...

Embodiment 3

[0121] Based on the frame structures given in the first and second embodiments, the third embodiment provides a method for transmitting uplink synchronization reference signals, which is applied to figure 2 The network deployment scenario shown, such as Picture 10 As shown, the specific steps include:

[0122] Step 101: The terminal completes synchronization with the low-frequency macro station based on the low-frequency link, and obtains the system clock on the network side and the terminal's uplink TA on the low-frequency link.

[0123] Step 102: The terminal determines the sending position of the time domain resource of its own uplink synchronization reference signal on the high frequency link.

[0124] The method for determining the sending position of time domain resources can use the system clock obtained by the low-frequency link and / or the uplink TA value obtained by the terminal on the low-frequency link, and the starting point of a certain time slot of the low-frequency li...

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Abstract

The invention discloses a method and device for transmitting an uplink reference signal, so as to realize the complete transmission of the uplink reference signal and improve the accuracy of data transmission. The method is that the terminal determines the time-domain resource transmission position of the uplink reference signal of the terminal on the high-frequency link, at least one end of the uplink reference signal has a guard interval; after arriving at the time-domain resource transmission position, within M time slices Switch the transmission beam in different time slots, and transmit the uplink reference signal, the uplink reference signal includes the uplink reference signal transmitted on M different time slots; N time slots; the receiving beam is switched in different time slots within the N time slots, and the uplink reference signal of the terminal is received, so that the complete transmission of the uplink reference signal can be realized.

Description

Technical field [0001] The present invention relates to the field of wireless technology, and in particular to a transmission method and device for uplink reference signals. Background technique [0002] High and low frequency base station hybrid networking, also known as Heterogeneous Network (HetNet) networking of high and low frequency base stations. Low frequency base stations cover a large area, and high frequency base stations carry out hot spot coverage within the coverage of low frequency base stations to enhance hot spots The capacity of the area. Because this networking mode can take advantage of the wide coverage capabilities of low-frequency base stations to reduce the system overhead of high-frequency directional link transmission control signaling, it is a key deployment scenario for 5G in the future. [0003] In the existing LTE system, Softcell networking is a typical HetNet networking solution. Softcell networking means that the micro / pico BS reuses the cell ID o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/12
CPCH04W72/12H04W56/001H04L5/0048H04W72/044
Inventor 曾昆王光健刘坤鹏
Owner HUAWEI TECH CO LTD
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