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Resource Determination Method and Device for Physical Random Access Channel

A technology of physical random access and random access channel, applied in wireless communication, electrical components and other directions, can solve the problems of insufficient PRACH capacity and affecting user access efficiency, etc.

Active Publication Date: 2020-11-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many new communication scenarios have been proposed for these new technologies. Among them, the number of users accommodated in a single cell in scenarios such as CoMP scenario 4 and Soft Cell is much larger than that of traditional cells, resulting in insufficient PRACH capacity, which affects user access efficiency.

Method used

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  • Resource Determination Method and Device for Physical Random Access Channel
  • Resource Determination Method and Device for Physical Random Access Channel
  • Resource Determination Method and Device for Physical Random Access Channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] In the frequency division duplex system, PRACH is allowed to perform frequency division multiplexing on each subframe, and UE uses at most one physical random access frequency domain resource to perform random access on each random access subframe.

[0103] The base station notifies UE1 that its PRACH configuration index is 0 through high-layer signaling;

[0104] After receiving the configuration index, UE1 queries the configuration index table to determine the time domain position for sending PRACH, where the system frame number is even and the subframe number is 1, that is, the time domain position for UE1 to send PRACH is the radio station where the system frame number is even. Subframe 1 in a frame (even radio frame).

[0105] The base station notifies UE1 of the index of the first physical resource block available for the UE's wireless random access channel on subframe 1 in each even-numbered radio frame through high-level signaling and PRACH random access chann...

Embodiment 2

[0112] In the frequency division duplex system, PRACH is allowed to perform frequency division multiplexing on each subframe, and UE uses at most one physical random access frequency domain resource to perform random access on each random access subframe.

[0113] The base station notifies UE1 that its PRACH configuration index is 6 through high-layer signaling;

[0114] After receiving the configuration index, UE1 queries the configuration index table to determine the time domain position of sending PRACH, where the system frame number is each radio frame, and the subframe number is 1, 6, that is, the time domain position of UE1 sending PRACH is each Subframe 1 and subframe 6 in the radio frame.

[0115] The base station notifies UE1 of the index of the first physical resource block available for the wireless random access channel of the UE on subframe 1 and subframe 6 in each radio frame through high-layer signaling and PRACH random access channel frequency domain resource...

Embodiment 3

[0122] In the frequency division duplex system, PRACH is allowed to perform frequency division multiplexing on each subframe, and UE uses at most one physical random access frequency domain resource to perform random access on each random access subframe.

[0123] The base station notifies UE1 that its PRACH configuration index is 6 through high-layer signaling;

[0124] After receiving the configuration index, UE1 queries the configuration index table to determine the time domain position of sending PRACH, where the system frame number is each radio frame, and the subframe number is 1, 6, that is, the time domain position of UE1 sending PRACH is each Subframe 1 and subframe 6 in the radio frame.

[0125] The base station notifies UE1 of the first physical resource block index available for the wireless random access channel on subframe 1 and subframe 6 in each radio frame to UE1 through high-level signaling. and

[0126] The base station notifies the UE1 of the wireless ...

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Abstract

A resources determining method for physical random access channel (PRACH) is disclosed, the method comprising: configuring multiple PRACH resources for each user equipment (UE), the PRACH resources include at least one of the following resources: time domain resource, frequency domain resource, code domain resource, spatial domain resource; wherein the time domain resource is transmission subframe configuration of the PRACH; the frequency domain resource is transmission frequency band configuration of the PRACH; the code domain resource is transmission sequence configuration or orthogonal masks configuration of the PRACH; the spatial domain resource is space access location configuration of the PRACH. A resources determining device for the PRACH is also disclosed. By the present invention, the resources multiplexing capacity of the PRACH in the frequency division duplex system can be increased, the PRACH collision probability can be decreased, thus the terminal access efficiency and the system throughput can be increased.

Description

technical field [0001] The present invention relates to a physical random access channel (PRACH, Physical Random Access Channel) resource determination technology, in particular to a resource determination method and device for a physical random access channel. Background technique [0002] A physical random access channel (PRACH, Physical Random Access Channel) is used for a terminal to send a random access signal (Random Access Preamble) to initiate a process of random access. [0003] figure 1 is a schematic diagram of the time domain structure of the physical random access channel, such as figure 1 As shown, the random access signal consists of three parts: cyclic prefix (CP, Cyclic Prefix), sequence (Sequence) and guard time (GT, Guard Time), as shown in Table 1 below, depending on the applicable scenarios (such as cell Radius, link budget, etc.), the physical layer of the Long Term Evolution (LTE, Long Term Evolution) system supports five random access signal formats...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/00H04W74/08
CPCH04W74/006H04W74/0833
Inventor 弓宇宏孙云锋张峻峰
Owner ZTE CORP
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