Time slot format configuration method based on physical random cut-in channel frame

A technology of physical random access and random channel access, which is applied in access restriction, connection management, wireless communication, etc., and can solve problems such as UE's failure to access normally and inconsistent spreading factors

Inactive Publication Date: 2009-04-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is possible that the spreading factors used by the PRACH message at the sending end (UE) and the receiving end (NodeB) are inconsistent, causing the UE to fail to access normally

Method used

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  • Time slot format configuration method based on physical random cut-in channel frame
  • Time slot format configuration method based on physical random cut-in channel frame

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Both the base station and the UE configure the minimum spreading factor as their own available spreading factor.

[0026] The core idea of ​​the solution in this embodiment is that the base station controller sends a request containing the field of the minimum spreading factor to the base station, and the base station configures the minimum spreading factor as its own available spreading factor after receiving the request; and the UE also sets The minimum spreading factor is configured as its own available spreading factor, so that the base station and the UE have a consistent understanding of the available spreading factors.

[0027] During specific implementation, the random access channel minimum spreading factor (RACH MinSF) field may be included in the common transport channel establishment request or common transport channel reconfiguration request, and may be in the original common transport channel establishment request or common transport channel ...

Embodiment 2

[0040] Embodiment 2: Modify the field of spreading factor in PRACH info.

[0041] The core idea of ​​this embodiment is that the available slot format set field is carried in the PRACH info. After receiving the PRACH info, the UE configures its own slot format according to the available slot format set field. In this way, the UE side configures the slot format The understanding is consistent with the existing understanding of the time slot format on the network side.

[0042] During specific implementation, the available time slot format set field may be added to the original PRACH info, or the minimum spreading factor field originally carried therein may be replaced with the available time slot format set field. According to this embodiment, the minimum spreading factor field originally carried in the PRACH info will be invalid, so this field can be removed. Those skilled in the art should realize that whether the minimum spreading factor field is included in the PRACH info ...

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Abstract

This invention discloses a configuration method for time slot format based on PRACH including: a base station controller generates and transmits request information containing the smallest spread spectrum factor field to the base station, which receives the request and configures its own available spread spectrum factors according to the smallest field, the controller sends the PRACH information to the UE containing the smallest spread spectrum field and the UE configures its own available spread spectrum factors in terms of the smallest factor in the PRACH information.

Description

technical field [0001] The present invention relates to the field of wireless access technologies, in particular to a method for configuring a slot format (Slot Format) based on a physical random access channel (Physics Random Access Channel, PRACH) frame. Background technique [0002] The transmission of PRACH is based on the slotted simultaneous multipoint transmission (ALOHA) with fast acquisition indication. A user terminal (UE) can start transmission at a predefined time offset, denoted as an access slot. There are 15 access slots in every two frames, and the interval is 5120 chips (chips). Information about which access slots are available in the current cell is given by high-level information. [0003] The PRACH frame structure is divided into a prefix part and a message part, such as figure 1 Shown: where the prefix part includes at least one prefix of 4096 chips, the length of the message part is 10ms or 20ms; each time slot of the message part includes 10×2 k bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04W48/12H04W72/04H04B7/26H04B1/707H04L1/00H04W76/02
Inventor 陈卫许亮徐昌平朱才军
Owner HUAWEI TECH CO LTD
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