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Time slot format configurating method based on physical random inserting channel frame

A technology of physical random access and time slot format, which is applied in the direction of selection device, wireless communication, communication between multiple stations, etc., and can solve problems such as UE cannot access normally and the spreading factor is inconsistent

Inactive Publication Date: 2008-10-15
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 configurating method based on physical random inserting channel frame
  • Time slot format configurating method based on physical random inserting channel frame
  • Time slot format configurating method based on physical random inserting channel frame

Examples

Experimental program
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Embodiment 1

[0029] Embodiment 1: The RNC calculates the minimum spreading factor and notifies the NodeB of the set of available time slot formats.

[0030] The processing flow of this embodiment is as follows figure 2 shown, including the following steps:

[0031] Step 201: RNC calculates the minimum spreading factor according to the configured TFS;

[0032] Step 202: The RNC searches the data field of the random access message in the 25.211 protocol according to the obtained minimum spreading factor to obtain the corresponding maximum time slot format SF1;

[0033] Step 203: The RNC sends a common transport channel establishment request or a common transport channel reconfiguration request to the NodeB, in which the available time slot format set of the NodeB is configured as 0-SF1, and the time slot format is a continuous value; For example, if SF1=3, the available slot format set configurations are 0, 1, 2, and 3.

[0034] Step 204: NodeB judges whether the available time slot form...

Embodiment 2

[0039] Embodiment 2: RNC calculates the minimum spreading factor and notifies NodeB of the maximum time slot format.

[0040] The processing flow of this embodiment is as follows image 3 shown, including the following steps:

[0041] Step 301: RNC calculates the minimum spreading factor according to the configured TFS;

[0042] Step 302: The RNC searches the data field of the random access message in the 25.211 protocol according to the obtained minimum spreading factor to obtain the corresponding maximum slot format SF1;

[0043] Step 303: The RNC configures the available time slot format of the NodeB as the maximum time slot format SF1 by sending a common transport channel establishment request or a common transport channel reconfiguration request to the NodeB;

[0044]Step 304: NodeB judges whether the maximum time slot format in the received request message matches the configured TFS, the match means that the maximum time slot format value is included in the configured ...

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Abstract

A method for configuring time shot format based on physical random access channel frame includes calculating and obtaining maximum time slot format corresponding to minimum spread spectrum factor by base station controller, sending request information containing maximum time slot format to base station by base station controller, configuring usable time slot format set of itself to be zero to maximum time slot format by base station according to received request 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): H04Q7/22H04B7/26H04W28/06H04W74/08
Inventor 陈卫许亮徐昌平朱才军
Owner HUAWEI TECH CO LTD
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