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Method and device for mapping reference signal and multiple access resource

A technology of reference signal and mapping method, applied in the directions of pilot signal allocation, multiple use of transmission path, sub-channel allocation of transmission path, etc., can solve the problem of increasing data transmission delay, reducing system throughput, and a large amount of signaling overhead, etc. question

Active Publication Date: 2021-02-12
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that when there are a large number of connected terminals in the system, a large amount of additional signaling overhead is required, which also increases the delay of data transmission and reduces the throughput of the system.

Method used

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  • Method and device for mapping reference signal and multiple access resource
  • Method and device for mapping reference signal and multiple access resource
  • Method and device for mapping reference signal and multiple access resource

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0070] This embodiment introduces a one-to-one mapping method between a reference signal and an interleaver for IDMA. In practical systems, the reference signal usually consists of four parameters, namely root sequence, cyclic shift, OCC and COMB. Here, a method of mapping two parameters of a reference signal to an interleaver is considered. The two parameters may be any two of the four reference signal composition parameters, and this embodiment will describe the case where the two parameters are the root sequence and the cyclic shift. Specifically, the reference signal sequence is generated as follows:

[0071]

[0072] where u and v are used to determine the root sequence , α is the cyclic shift, n=0, 1, . . . , T-1 is the nth sample point of the reference signal, and T is the length of the reference signal. When the two terminals are from different cells, or the lengths of resource blocks (RBs) occupied by their transmission data are different, the reference signa...

Embodiment 2

[0100] Embodiment 1 introduces a mapping process for a system using an interleaver as a multiple access resource. In this embodiment, a system using power as a multiple access resource is considered, such as NOMA in the uplink power domain. In this type of system, by performing power control, the receiving power of signals sent by different terminals is different, so as to achieve the purpose of distinguishing users. At this time, power control can be completed by establishing a mapping relationship with the reference signal.

[0101] This embodiment considers a method of mapping multiple access power from two parameters of a reference signal, ie root sequence and cyclic shift. First, use the pre-agreed power reference in the system to generate a second-level power reference according to certain rules according to the first parameter of the reference signal; then, using the generated second-level power reference, according to the second parameter of the reference signal, Pow...

Embodiment 3

[0107] Embodiment 1 and Embodiment 2 respectively introduce a mapping process for a system using an interleaver and received power as multiple access resources. In this embodiment, consider systems that use codebooks and / or pattern maps as multiple access resources, such as SCMA, MUSA, PDMA, NCMA, NOCA, and RSMA. In such systems, resource pools (codebook design and pattern mapping pattern) rely on relatively complex optimization algorithms, so it is difficult to generate them in a simple way based on a parent resource. In addition, it should be noted that the mapping method of this embodiment is also applicable to multiple access systems using the interleaver and / or power as the multiple access system. Circumstances arising from the methods mentioned in the second paragraph. That is to say, this embodiment is applicable to the case where the multiple access resource is any of the following: space resource, bit-level interleaver, symbol-level interleaver, power, non-orthogonal...

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Abstract

The present application discloses a method for mapping reference signals and multiple access resources, including: determining the reference signals used for uplink data transmission; determining the multiple access resources according to the mapping relationship between the reference signals and multiple access resources; access resources; and communicate using the multiple access resources. The mapping method described above in the present application can also be applied to a scheduling-free system. It only needs to map the root sequence index, cyclic shift, OCC index and COMB index, and then map the multiple access resources according to the above mapping method. The application also discloses a mapping device for reference signals and multiple access resources. By applying the technical solution disclosed in this application, signaling overhead can be reduced.

Description

technical field [0001] The present application relates to the field of wireless communication technologies, and in particular, to a method and device for mapping a reference signal of a multiple access system to multiple access resources. 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), it brings unprecedented challenges to the future mobile communication technology. For example, according to the report ITU-R M.[IMT.BEYOND 2020.TRAFFIC] of the International Telecommunication Union ITU, it can be expected 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, and as massive IoT devices gradually penetrate into mobile communication networks, the number of connected devices will be even more staggering. To meet t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
CPCH04L5/0048H04L1/0071
Inventor 郝辰曦钱辰喻斌付景兴熊琦
Owner BEIJING SAMSUNG TELECOM R&D CENT