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Empty message sequence processing method and system for mobile terminal switching process

A mobile terminal, air interface message technology, applied in the direction of electrical components, radio/induction link selection arrangement, selection device, etc., can solve problems such as no good solution, achieve easy implementation, improve reliability, and achieve weight prevention The effect of the attack function

Inactive Publication Date: 2007-08-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the wireless network, after the mobile terminal is handed over, it still needs to use the serial number of the air interface message on the new base station, but currently there is no good solution for how to initialize the value of the serial number of the air interface message after the handover, thus making the mobile terminal After the terminal is switched, the anti-replay attack function cannot be well realized in the wireless communication system

Method used

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  • Empty message sequence processing method and system for mobile terminal switching process
  • Empty message sequence processing method and system for mobile terminal switching process
  • Empty message sequence processing method and system for mobile terminal switching process

Examples

Experimental program
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Embodiment 1

[0100] In this embodiment, when the handover is successful, the specific implementation process of the present invention is shown in Fig. 1, and specifically includes the following processing steps:

[0101] Step 11: The handover preparation process between the mobile terminal and the serving base station. In this process, the mobile terminal will maintain an authorization key context for each candidate target base station and the serving base station, which need to include the uplink and downlink at this time. The air interface message sequence number value; at the same time, the mobile terminal and each base station must record the uplink and downlink air interface packet message sequence numbers K_U and K_D at this time;

[0102] The handover preparation process can be initiated by the mobile terminal, or by the serving base station, and then the mobile terminal responds;

[0103] Step 12: The serving base station sends a handover request message to each candidate target base s...

Embodiment 2

[0115] In this embodiment, a method for processing the message sequence number when the handover is canceled is given, as shown in Fig. 2 specifically, including:

[0116] The processing procedure from step 21 to step 23 is completely the same as the processing procedure shown in FIG. 1, so it will not be described here, and only the processing steps that are different from the processing procedure in FIG. 1 will be described.

[0117] Step 24: If the mobile terminal decides not to handover, it sends a handover cancel message to the serving base station, instructing the serving base station to cancel the aforementioned handover processing.

[0118] After the mobile terminal sends this message, the operation and processing procedures that the terminal side and the serving base station side will use for their respective buffered message sequence number values ​​are as follows:

[0119] 1. The mobile terminal compares the value of the uplink message sequence number corresponding to e...

Embodiment 3

[0126] In this embodiment, the specific implementation manner 1 of the present invention in the case of abnormal handover is given, as shown in FIG. 3, which specifically includes the following steps:

[0127] Step 31: Handover preparation process between the mobile terminal and the serving base station;

[0128] During the handover preparation process, an authorization key context needs to be maintained on the mobile terminal for each candidate target base station and the serving base station respectively, which needs to include the value of the sequence number of the uplink and downlink messages at this time; at the same time, the mobile terminal and each base station also need Record the message sequence numbers K_U and K_D of the uplink and downlink air interface packets at this time respectively;

[0129] The handover preparation process can be initiated by the mobile terminal, or by the serving base station, and then the mobile terminal responds.

[0130] Step 32: The servin...

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PUM

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Abstract

The method includes steps: maintaining mutual independent up and down going aerial port message sequence number (UDAPMSN) for each candidate target base station and service station respectively is setup on mobile terminal to be switched; maintaining UDAPMSN corresponding to the mobile terminal is setup on candidate target base station and service station respectively; after finishing switching, mobile station and final selected base station adjusts obtained each current UDAPMSN based on saved UDAPMSN. The invention guarantees that when mobile terminal has switched, new base station (i.e. target base station) can determine corresponding UDAPMSN correctly. Based on the sequence number, the invention implements anti replay attack process so as to raise reliability of wireless communication.

Description

Technical field [0001] The present invention relates to the field of wireless communication technology, and in particular to a processing technology of an air interface message sequence number in a mobile terminal handover process. Background technique [0002] In wireless networks, in order to prevent replay attacks, the usual method is to define the air interface message sequence number, that is, to define the packet sequence number of the message exchanged between the user terminal and the base station. For example, in the current IEEE802.16d and IEEE802.16e protocols, two air interface message sequence numbers are defined for mobile terminals. They are the uplink air interface message sequence number and the downlink air interface message sequence number, which are used to prevent uplink air interface messages. Replay attacks and downstream air interface message replay attacks. [0003] The specific implementation principle of anti-replay attack is: [0004] (1) During the in...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04W36/02H04W36/08
Inventor 林志斌单长虹
Owner HUAWEI TECH CO LTD
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