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Competition random access method

A technology of random access and random access preamble, applied in electrical components, wireless communication and other directions, which can solve problems such as time extension

Inactive Publication Date: 2012-05-23
POTEVIO INFORMATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the UE wants to complete the random access, it can reselect the random access resource and re-initiate the random access only after knowing that a random access resource collision has occurred. Therefore, when the random access collision occurs, the UE initiates the random access again. The delay is also longer

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  • Competition random access method
  • Competition random access method

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Embodiment Construction

[0049] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0050] The main idea of ​​the present invention is: when the eNB determines that a random access resource collision has occurred to the UE, it notifies the UE that a random access resource collision has occurred, and the UE stops this random access after determining that a random access resource collision has occurred according to the notification, Therefore, it is possible to reduce the time delay for re-initiating random access in the case of random access resource collision of the UE.

[0051] see image 3 , image 3 It is a schematic flow diagram of a contention random access process in an embodiment of the present invention, and the specific flow includes the following steps:

[0052] In step 301, the UE initializes the number of random access pr...

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Abstract

The invention provides a competition random access method, comprising the following steps: A, a piece of user equipment (UE) selects the random access resources and transmits random access messages to an evolution base station (eNB); B, the eNB judges whether the random access resources are collided among the UEs after receiving the random access messages sent by the UE and informs the UE whether the random access resources are collided; C, the UE determines whether the random access resources are collided according to the notification; if the random access resources are collided, the UE stops the random access, if not, the UE executes the step D; and D, the UE continuously executes the follow-up random access procedure. The method reduces the time delay for initiating the random access again under the condition that the random access resources are collided among the UEs.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for contention random access. Background technique [0002] In the current Long Term Evolution (LTE) system, medium access control adopts a random access technology, which is divided into two modes: contention random access and non-contention random access. Since the non-contention random access mode is limited by usage scenarios and non-competition resources, most of the current communication systems adopt the contention random access mode. see figure 1 , figure 1 It is a schematic flow diagram of the process of competing for random access in the prior art, and its processing flow is: [0003] Step 101, a user equipment (UE) sends a random access message to an evolved base station (eNB). [0004] In this step, the UE first obtains and saves important system parameters related to random access in the system broadcast information, as well as available r...

Claims

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Application Information

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IPC IPC(8): H04W74/08
Inventor 胡静
Owner POTEVIO INFORMATION TECH
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