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Random access collision back-off method

A random access and random number technology, applied in electrical components, wireless communication, etc., can solve problems such as taking system parameters into account, collision avoidance process cannot be adjusted, etc., to reduce the number of retransmissions, realize differential control, and improve throughput Effect

Active Publication Date: 2009-07-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods fail to take into account the factor of the random access load size of the system parameters when performing the random access collision avoidance process, so that the collision avoidance process cannot be adjusted with the change of the random access load size

Method used

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  • Random access collision back-off method
  • Random access collision back-off method
  • Random access collision back-off method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Such as figure 2 As shown, the implementation specifically includes the following steps:

[0058] 1. The UE is informed of the value set table (as shown in Table 1) that triggers the random access service Sa and the value of the random access load Pc; the random access load Pc is updated at a certain period, as shown in image 3 shown.

[0059] Table 1 Sa value set table

[0060] serial number Access reason triggering random access Urgency correlation coefficient a) Emergency call Urgent S 1 b) Handover requiring random access procedure; Urgent S 2

c) UL data arrival during RRC_CONNECTED requiring

random access procedure

Urgent

S 3

d) DL data arrival during RRC_CONNECTED requiring

random access procedure

Urgent

S 4 e) Paging response Urgent 0.8 f) Initial access after radio link failure Non-Urgent S 6 g) Tracking area update Non-Urgent S 7 ...

Embodiment 2

[0067] Such as figure 2 As shown, the implementation specifically includes the following steps:

[0068] 1. The UE is informed of the value set table (as shown in Table 2) that triggers the random access service Sa and the value of the random access load Pc; the random access load Pc is updated at a certain period, such as image 3 shown.

[0069] Table 2 Sa value set table

[0070] serial number Access reason triggering random access Urgency correlation coefficient a) Emergency call Urgent S 1 b) Handover requiring random access procedure; Urgent S 2

c) UL data arrival during RRC_CONNECTED requiring

random access procedure

Urgent

S 3

d) DL data arrival during RRC_CONNECTED requiring

random access procedure

Urgent

S 4 e) Paging response Urgent 0.8 f) Initial access after radio link failure Non-Urgent S 6 g) Tracking area update Non-Urgent S 7 h) ...

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Abstract

The invention relates to a random access collision retreat wince method which includes: a judge threshold Pi is generated according with an access reason of random access and system load; a terminal automatic generates the random number Ri when ready to access, and selects processing access or retreat according with a compared result for the Ri and the judge threshold Pi. The retreat method not only makes the random access process be distinguished according with various trigger random access operation for realizing quantitatively managed among various operation; but also the quantitatively is completed accurately amended by the system parameter. The collision event is developed in time domain in location with larger random access load for reducing high collision probability initiated by high random access load region user.

Description

technical field [0001] The invention relates to mobile communication, in particular to a random access collision avoidance method. Background technique [0002] With the evolution of the network and the development of communication technology, the new generation of mobile communication system must be able to support all-IP high-speed packet data transmission above 100Mbps (Mbps: Megabit per second), support high terminal mobility, and support high transmission quality , Provide high spectral efficiency and power efficiency, and can effectively support changes in a large dynamic range such as user data rate, user capacity, service quality, and mobile speed. Due to the increase of user density, the increase of business volume and the increase of mobile speed, the random access resources are in short supply. Therefore, while ensuring the quality of user access, it is necessary to further improve the use efficiency and method of random access resources. The mechanism is a commo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
Inventor 王斌杜忠达李峰朱常青赵楠彭爱华黄海旭
Owner ZTE CORP
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