Access processing method and user equipment

A technology of user equipment and a processing method, which is applied in the field of communication, can solve problems such as prolongation of UE access network access time, lack of fairness, etc., and achieve the effects of improving access delay and system performance

Inactive Publication Date: 2011-05-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention is proposed in view of the prolongation of access time and lack of fairness in the UE access network in the related art. Therefore, the main purpose of the present invention is to provide an access processing solution to solve the above problems

Method used

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  • Access processing method and user equipment

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0051] image 3 is a flowchart of an access processing method according to Example 1 of an embodiment of the present invention, as shown in image 3 As shown, the method includes the following steps S301 to S305:

[0052] Step S301, if the terminal encounters preamble failure or contention resolution failure, and the high-level timer (for example, T300) has not expired, the terminal still has a chance to resend MSG1, and executes step S302, if the high-level timer expires, access fail.

[0053] Step S302, if there is a BI sub-header in MSG2 (the BI sub-header is represented by 4 bits, Figure 4 is a schematic diagram of the MAC PDU structure of MSG2 according to the embodiment of the present invention), determine the fallback value corresponding to the BI subheader according to Table 1, and perform step S303, if there is no BI subheader in MSG2, the terminal configures the parameters according to the random access Choose the nearest opportunity to resend MSG1.

[0054] In ...

example 2

[0059] Figure 5 is a schematic diagram of the time delay of the access process according to the embodiment of the present invention. For a terminal that has accessed n times before successfully accessing, it is assumed that the MSG2 received every time MSG1 is sent carries a BI sub-header, and it is assumed that each time The failures are all due to preamble failure (if the reason for failure is the failure of contention resolution, the situation is similar), then the access delay consists of three parts: (1) When n-1 failed accesses, it will wait for a total of n -1 Transmission Time Interval (Transmission Time Interval, referred to as TTI) window (TTI Window); (2) The waiting time after the n-1th failure and before re-initiating access, this value is based on the sequence number in the BI instruction The maximum backoff value obtained by looking up the table, the backoff value is randomly selected according to the uniform distribution within the range of [0, backoff value];...

example 3

[0071] Assume that two UEs send MSG1 at the same time, and the MAC header of MSG2 received by the two UEs from the base station contains a BI subheader, and there is no matching RAPID in the RAR subheader (that is, preamble failure). Let UE1 send for the kth time, and UE2 send for the lth time (and l>k). According to Table 1, the fallback value corresponding to the BI subheader is BV.

[0072] According to the above algorithm, when retransmitting, the fallback value of UE1 is The fallback value for UE2 is UE1 has more fallback time than UE2 According to a uniform distribution, the mean value of the fallback value will decrease When the BV is large or the difference between l and k is large, the difference between the back-off mean values ​​of UE1 and UE2 is also larger, which significantly improves access fairness and access delay.

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Abstract

The invention discloses an access processing method and user equipment. The method comprises the following steps that: the user equipment sets a value range of a backoff value according to a backoff frequency; and the user equipment transmits a pilot frequency to a base station by using the backoff value within the value range. Due to the invention, the problems of long access time delay and fairness absence in the access of the user equipment to a network of the prior art are solved, and the effects of improving the access time delay and enhancing the system performance are achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to an access processing method and user equipment. Background technique [0002] In a wireless communication system, the average access delay is an important index to measure system performance. In a Long-Term Evolution (LTE for short) system, when a user terminal is powered on or performs a Non Access Stratum (Non Access Stratum, NAS for short) process, a random access procedure will be triggered, figure 1 is a schematic diagram of signaling interaction of random access according to related technologies. The terminal carries a randomly selected pilot identifier (Identifier, referred to as ID) in the pilot (message 1 (MSG1) also called preamble) and sends it to the base station, and the received random access response (Random If the random access pilot ID (Random Access Preamble ID, RAPID for short) in the Access Response (abbreviated as RAR, also known as MSG2) subheader is con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04L1/18
CPCH04W74/085
Inventor 王琳刘钰张鹏刘利平
Owner ZTE CORP
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