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Resource determining method and device for physical random access channel

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

Active Publication Date: 2014-04-09
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 determining method and device for physical random access channel
  • Resource determining method and device for physical random access channel
  • Resource determining 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-level 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 for sending PRACH, where the system frame number is each radio frame, and the subframe number is 1, 6, that is, the time domain position for UE1 to send 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 resour...

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 for sending PRACH, where the system frame number is each radio frame, and the subframe number is 1, 6, that is, the time domain position for UE1 to send 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 wireles...

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Abstract

The invention discloses a resource determining method for a physical random access channel. The method comprises the step of configuring a plurality of physical random access channel resources for each piece of user equipment (UE), and the physical random access channel resources include at least one of the following resources: time domain resource, frequency domain resource, code domain resource and space domain resource, wherein the time domain resource is emission sub-frame configuration of a physical random access channel, the frequency domain resource is emission band configuration of the physical random access channel, the code domain resource emission sequence or orthogonal mask configuration of the random access channel, and the space domain resource is space access location configuration of the random access channel. The invention further discloses a resource determining device for a physic al random access channel. The PRACH resource reusing capability in a frequency division duplex system is improved, the PRACH collision probability is reduced, and the terminal access efficiency and the system throughput are improved.

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