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Method and arrangement in a telecommunication system

A technology of equipment and user equipment, applied in the direction of electrical components, wireless communication, emergency/dangerous communication services, etc., can solve problems such as inflexible solutions and inconsistencies

Active Publication Date: 2012-07-11
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] However, since the reality is that the UE needs to send the new UE capabilities to the network every time it performs an emergency call, and again at the end of the emergency call, alternative #2 may cause a lot of signaling between the UE and the network
This may lead to inconsistencies and since there may be other services in the future that allow handover to E-UTRAN besides emergency calls, it will be an inflexible solution

Method used

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  • Method and arrangement in a telecommunication system

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Embodiment Construction

[0055] The invention can be illustrated in the following non-limiting description of an embodiment of the invention. In the following description, the situation related to the handover from UTRAN to E-UTRAN is referred to, where the UMTS encryption and integrity protection keys CK, IK are received by the serving RNC from the serving GPRS support node. It should be noted, however, that the invention should not be considered limited to these particular keys. In another case, the principles according to certain embodiments of the present invention may be applied to other keys generated at authentication and key agreement when the UE attaches to the serving network.

[0056] figure 1 The scheme of signaling that will be referred to in the following detailed description of certain embodiments of the invention is shown.

[0057] figure 1 The authentication procedure represented by step 6 in , is preceded by known steps 1-5 related to the connection setup when the UE attaches to t...

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PUM

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Abstract

The invention relates to a method and arrangement in a serving Radio Network Controller, SRNC for controlling inter RAT handover to E-UTRAN of a UE with E-UTRA capability operating in a serving network comprising said SRNC, wherein the SRNC receives, from a Serving GPRS Support Node, SGSN, security keys generated at authentication and key agreement, AKA, upon attachment of the UE to the serving network; characterized in the steps of - determining (202) which type of UICC the UE is equipped with by analyzing the security keys received from SGSN; - using the knowledge of which type of UICC the UE is equipped with to base a decision (204) on whether to allow handover of the UE to E-UTRAN.

Description

technical field [0001] The present invention relates to inter-RAT handover procedures. Background technique [0002] The present invention relates to Inter-RAT (Radio Access Technology) handovers in communication networks. A solution for inter-RAT handover has been agreed within the scope of 3GPP E-UTRAN, also known as Long Term Evolution LTE standardization. As used herein, E-UTRAN denotes a cellular radio system developed and standardized by 3GPP, and eNodeB (eNB) denotes an E-UTRAN radio base station. Such eNodeBs can serve multiple E-UTRAN cells. [0003] The functionality to handle user mobility is an essential component in cellular networks. From a quality of service perspective, such functionality must ensure that service continuity is maintained when a user of a wireless communication device moves from one cell to another during an active session, and that each new session is established in a sufficiently benign radio environment . Such functionality should ensu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W4/90
CPCH04W36/0038H04W36/14H04W36/0083H04W12/04H04W12/08H04W36/0085H04W12/043H04W12/041H04W36/1443
Inventor I·诺德斯特兰德H·帕尔姆
Owner TELEFON AB LM ERICSSON (PUBL)
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