Signal processing method and device

A technology for signal processing and signal transmission, applied in the field of mobile communication, which can solve the problems of inability to directly use cellular communication signal processing methods, signal scrambling, etc.

Inactive Publication Date: 2015-08-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a D2D network, D2D UEs can also use PUSCH / PUCCH to carry information and transmit signals, but when D2D UEs form a network in the form of self-organization, there is no central control node in the network to schedule UE resources, parameters, etc. configuration, so the UE cannot directly use the signal processing method in cellular communication, perform pseudo-random sequence initialization based on Cell ID and / or C-RNTI, and further process the signal by scrambling and generating pilots

Method used

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example 1

[0098] A flowchart of a signal processing method proposed in this embodiment, such as image 3 shown, including the following steps:

[0099] Step 11: When the UE has data to be transmitted, determine the generation method of the pseudo-random sequence according to the type of data to be transmitted;

[0100] The type of the data is D2D communication data or cellular communication data.

[0101] Step 12: When the data to be sent is D2D communication data, the UE assigns an initial value for generating a pseudo-random sequence according to a predefined rule;

[0102] The UE determines the initial value type of the pseudo-random sequence according to predefined rules, such as UE ID or Group ID.

[0103] When the type of data to be sent is cellular communication data, the UE processes the data according to standard rules of cellular communication.

[0104] Step 13: Generate the pseudo-random sequence according to the initial value.

[0105] Step 14: Generate one or more of the ...

Embodiment 2

[0140] In this embodiment, the initial value types of the pseudo-random sequence that the UE can use include: constant value, UE ID, Group ID, frame number, subframe number, time slot number, codeword number, antenna port number, resource index, etc., and the UE can Use one or more of the above types as initial values ​​for pseudorandom sequence generation, where:

[0141] The constant value refers to the fixed value defined by the system, the length of the binary expression is h bit, 1≤h≤16, and the corresponding decimal value ranges from [0,2 h -1], the process of obtaining the ID is not required.

[0142] The Group ID is determined by the upper layer, or obtained through the group public control message when the UE joins the group. The length of the binary expression is t bits, 1≤t≤16, and the corresponding decimal value ranges from [0, 2 t -1]. The Group ID is identification information of the D2D communication group where the UE belongs, and the UEs belonging to the sam...

Embodiment 3

[0148] When the UE obtains the UE ID by truncating the IMEI or IMSI, there are two truncation methods:

[0149] Method 1: Express the corresponding value of IMEI or IMSI in binary form, and take consecutive n bits from the highest or lowest bit as the UE ID, such as Figure 4 As shown, the truncated UE ID is obtained;

[0150] Or, extract n bits from the specified position as the UE ID according to certain rules, such as Figure 5 As shown, the truncated UE ID is obtained.

[0151] Method 2: Perform a modulo operation on the corresponding value R of IMEI or IMSI to N to obtain the UE ID, that is, UE ID=R mod N, where N=2 n .

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Abstract

A signal processing method and device. The method comprises: when there is data to be sent, determining, by a user equipment, a generation manner of a pseudo-random sequence according to a type of the data to be sent; when the data to be sent is device-to-device communication data, conducting, by the user equipment, assignment on an initial value of the generated pseudo-random sequence according to a pre-defined rule, and generating the pseudo-random sequence according to the initial value; generating one or more of a scrambling sequence, a cyclic shift sequence or a pilot sequence according to the pseudo-random sequence; and processing the data to be sent using one or more of the scrambling sequence, the cyclic shift sequence or the pilot sequence. The embodiments of the present invention enable a UE to generate a pseudo-random sequence by using a pre-defined initial value type as an initialization parameter, to conduct scrambling, cyclic shift, pilot insertion and other processing on a signal to be transmitted, thereby playing roles of randomizing signal interference, enhancing the anti-interference capability, and improving the signal receiving accuracy rate and the resource utilization rate.

Description

technical field [0001] The present invention belongs to the field of mobile communication, and in particular relates to a signal processing method in device-to-device (Device-to-Device, D2D for short) communication. Background technique [0002] In a cellular system, when there is a service to be transmitted between two user equipments (UE1), the service data from user equipment 1 (UE1) to user equipment 2 (UE2) will first pass through the air interface (referred to as UE). Air interface) to base station 1, base station 1 transmits the user data to base station 2 through the core network, base station 2 then transmits the above service data to UE2 through the air interface, and the service data transmission from UE2 to UE1 adopts a similar processing flow. When UE1 and UE2 are located in the same cell, such as figure 1 As shown, although base station 1 and base station 2 are at the same site, one data transmission still consumes two wireless spectrum resources. [0003] It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W8/20H04W8/26
CPCH04W4/70H04W8/20H04W8/26H04B2201/70707H04W72/00H04B1/69H04L1/00H04L25/03866H04W76/14H04W72/27H04W72/20H04W72/04
Inventor 杨瑾吴栓栓戴博袁明王文焕黄双红
Owner ZTE CORP
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