WO2011160474A1

WO2011160474A1 - Method and system for accessing control during cell update

Info

Publication number: WO2011160474A1
Application number: PCT/CN2011/071781
Authority: WO
Inventors: 王昇明; 奚进; 刘磊
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-21
Filing date: 2011-03-14
Publication date: 2011-12-29
Also published as: CN102291705B; CN102291705A

Abstract

The present invention discloses a method for accessing control during cell update, and it includes the following steps: During the cell update for a User Equipment (UE), a Home NodeB Gateway (HNB GW) determines that a source Home NodeB (HNB) and a target HNB are not belonged to the same Close Subscriber Group (CSG), then the HNB GW executes the accessing control for the UE in local, or indicates a Core Network (CN) to execute the accessing control for the UE. The present invention also discloses a system for accessing control during cell update. Applying the method and system of the present invention can solve the problem in the prior art that the target cell cannot use a Radio Network Controller Identification (RNC-Id) provided by the UE to localize the source HNB, caused that the multiple HNBs belonged to one HNB GW have the same RNC-Id. And the accessing control for the UE by the CN or the HNB GW it realized.

Description

Access control method and system in cell update

The present invention relates to a wireless cellular communication system, and more particularly to an access control method and system in cell update. Background technique

The home base station (HNB, Home NodeB) is a small, low-power base station deployed in indoor places such as homes and offices. Its main function is to provide users with higher service rates and lower the cost of using high-speed services. At the same time, it can make up for the shortage of existing distributed cellular wireless communication systems. The advantages of home base stations are affordability, convenience, low power output, plug and play, and more.

The structure of the home base station system is shown in FIG. 1. The home base station user is connected to the core network through a home base station access network (HNB AN, Home NodeB Access Network), wherein the HNB AN is composed of an HNB and a home base station gateway (HNB). GW, Home NodeB Gateway ) is a common component, and there is usually a security gateway between them. The main function performed by the HNB GW is to verify the security of the home base station, handle the registration and access control of the home base station, and exchange data between the core network and the home base station. The home base station management system (HMS, HNB Management System) performs operation and maintenance management on the home base station, and configures and controls the home base station according to the requirements of the operator. The most important is to implement configuration management functions for the HNB, including verification of location information, and parameters for the HNB. Configuration, etc.

With the development of technology, the home base station introduces the concept of Closed Subscriber Group (CSG). The closed subscriber group refers to a group of subscribers, each of which allows access to one or more specific cells, HNB. There are three access modes: closed access mode (if the user's CSG ID is the same as the HNB's own CSG ID, access is allowed;), open Release access mode (allows access if the user does not support CSG), Hybrid access mode (if the user's CSG ID is the same as the HNB's own CSG ID, access is allowed, and if the user does not support CSG) In this way, the home base station also has two types of support for CSG and no support for CSG; in addition, the user equipment (UE, User Equipment) also has two types of UEs that support CSG and do not support CSG. The CSG-capable UE can read the CSG configuration information in the system broadcast, and perform initial access judgment according to its Allowed CSG List. The Allowed CSG List is a CSG list that the UE subscribes to, allowing the CSG list to be stored in the UE and the core network (CN, Core Network). Corresponding to the Allowed CSG List, the HNB GW retains the list of the International Mobile Subscriber Identity (IMSI) of the HNB-signed UE; that is, the Allowed CSG List is the basis for the CN to determine the access control of the UE, and the HNB signing The IMSI list of the UE is a basis for determining the access control of the UE by the HNB GW. The existing standard stipulates that for a case where the UE does not support the CSG or the HNB does not support the CSG, the access control of the UE is completed at the HNB-GW, and for the case where the UE and the HNB simultaneously support the CSG, the access control of the UE is completed at the CN.

U-RNTI is the UE in the terrestrial radio access network (UTRAN, UMTS Terrestrial Radio

The temporary identifier in the Access Network is assigned by the Radio Network Controller (RNC) to the UEs that need to establish a Radio Resource Control (RRC) connection to distinguish them from different UEs in the same UTRAN. The U-RNTI consists of the following two parts: Service Radio Network Controller (SRNC), which identifies the SRNC under the same UTRAN; Serving RNC Radio Access Network Temporary Identity (S-RNTI, Serving RNC Radio) Network Temporary Identifier), used to identify UE related information in the SRNC.

When the terminal under the Universal Mobile Telecommunications System (UMTS) is in the connected state, there are four states, namely, the cell-paging channel (CELL PCH, CELL Paging Channel) and the cell forward access channel (CELL_FACH, CELL—Forward Access Channel, CELL DCH, CELL—Dedicated Channel, and UTRAN Registration Area—Paging Channel. According to the different UE states, the handover of the corresponding UE has CELL-DCH state switching and CELL-FACH state switching, wherein the CELL DCH state switching existing protocol has completed the specification; and for the CELL-FACH state The next handover, that is, the corresponding forward handover (cell update procedure), the current process specification is shown in Figure 2, including the following steps:

Step 201: After performing cell reselection, the UE sends a Cell Update message to the target RNC.

Step 202: The target RNC is configured according to the source RNC-Id included in the U-RNTI of the UE in the message to the source RNC to which the UE belongs, and forwards the cell update message to the source RNC.

Step 203: The source RNC performs a Serving Radio Network Subsystem (SRNS) to re-distribute the Relocation.

Step 204: The target RNC sends a Cell Update Confirm message to the UE. In addition to the existing S-RNTI and SRNC-ID (that is, the old U-RNTI) of the UE, the target RNC also allocates a new S-RNTI to the UE. And the SRNC-ID (ie, the new U-RNTI), and carry the new S-RNTI and SRNC-ID in the Cell Update Confirm message.

Step 205: The UE sends a UTRAN Mobility Information Confirm message to the target RNC to complete the cell update and confirm the re-allocation of the U-RNTI.

The current process does not accommodate cell updates between two home base stations under the existing one. One reason is that, due to the introduction of the ΗΝΒ and HNB GW concepts, multiple ΗΝΒ under one GW GW have the same RNC-Id, and the target cell cannot locate the source HNB through the RNC-Id provided by the UE, that is, the steps in FIG. 2 202; Another reason is that the introduction of the CSG concept makes the core network or the home base station gateway need to perform access control on the UE, and the current flow The procedure lacks the necessary steps and information to perform the access control of the UE. Summary of the invention

In view of the above, the main purpose of the present invention is to provide an access control method and system in a cell update, so as to solve the problem that multiple HNBs in one HNB GW have the same RNC-Id in the prior art, and the target cell cannot pass. The RNC-Id provided by the UE locates the problem of the source HNB; and implements access control for the UE.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention provides an access control method in a cell update, the method comprising: in a cell update process of a user terminal (UE), the home base station gateway (HNB GW) determines that the source home base station (HNB) and the target HNB are not When belonging to the same closed subscriber group (CSG), the access control to the UE is performed locally, or the core network (CN) is instructed to perform access control on the UE.

The method further includes: the HNB GW comparing the CSG configuration information of the source HNB with the CSG configuration information of the target HNB, and if the two are the same, determining that the source HNB and the target HNB belong to the same CSG; otherwise, determining that the The source HNB and the target HNB do not belong to the same CSG.

The method further includes: when it is determined that both the UE and the target HNB support the CSG, the HNB GW instructs the CN to perform access control on the UE, specifically:

The HNB GW sends a UE access control judgment message to the CN, where the message carries the CSG configuration information of the target HNB and the identifier of the UE; the CN performs the access control judgment according to the information carried in the UE access control judgment message. If the target HNB is in the closed access mode, and the CSG identifier of the target HNB is not in the allowed CSG list of the UE, the access control result is a failure;

If the target HNB is in the closed access mode, and the CSG identifier of the target HNB exists in the allowed CSG list of the UE, the access control result is successful; If the target HNB is in the hybrid access mode, the access control result is successful; and if it is a member of the target HNB, if the CSG identity of the target HNB is not in the allowed CSG list of the UE, determining that the UE is the target Non-member of HNB.

The method further includes: when determining that the UE or the target HNB does not support the CSG, the HNB GW performs local access control to the UE, specifically:

If the International Mobile Subscriber Identity (IMSI) of the UE does not exist in the IMSI list of the target HNB, the access control result is a failure; if the IMSI of the UE exists in the IMSI list of the target HNB, then The result of the entry control is successful.

The method further includes: the HNB GW continuing the cell update process when the access control result is successful; and terminating the cell update process when the access control result is a failure.

The method further includes: in the cell update process of the UE, the HNB GW performs collision detection on the U-RNTI allocated by the target HNB for the UE and the U-RNTI allocated by the other HNBs in the HNB GW.

The present invention also provides an access control system in a cell update, where the system includes: a UE, an HNB GW, a source HNB, and a target HNB that perform a cell update process, where

The HNB GW is configured to perform access control on the UE locally when it is determined that the source HNB and the target HNB do not belong to the same CSG.

The HNB GW is further configured to perform access control on the UE locally when determining that the UE or the target HNB does not support the CSG.

The HNB GW is further configured to perform collision detection on the U-RNTI allocated by the target HNB for the UE and the U-RNTI allocated by the other HNBs in the HNB GW in the cell update process of the UE.

The present invention also provides an access control system in a cell update, the system includes: a UE that performs a cell update procedure, a HNB GW, a source HNB, and a target HNB, and further includes a CN, where The HNB GW is configured to: when determining that the source HNB and the target HNB do not belong to the same CSG, instruct the CN to perform access control on the UE;

The CN is configured to perform access control on the UE according to the indication of the HNB GW.

The HNB GW is further configured to: when determining that the UE and the target HNB support the CSG, instruct the CN to perform access control on the UE.

The access control method and system in the cell update provided by the present invention, in the cell update process of the UE, when the HNB GW determines that the source HNB and the target HNB do not belong to the same CSG, perform local access to the UE. Control, or instruct the CN to perform access control to the UE. During the cell update process of the UE, the HNB GW performs collision detection on the U-RNTI allocated by the target HNB for the UE and the U-RNTI allocated by the other HNBs in the HNB GW. The method and the system of the present invention solve the problem that the multiple HNBs in one HNB GW have the same RNC-Id in the prior art, and the target cell cannot locate the source HNB through the RNC-Id provided by the UE; Or access control of the UE by the HNB GW. DRAWINGS

1 is a schematic structural diagram of a structure of a home base station system in the prior art;

2 is a flow chart of cell update in the prior art;

3 is a flowchart of an access control method in a cell update according to Embodiment 1 of the present invention; and FIG. 4 is a flowchart of an access control method in a cell update according to Embodiment 2 of the present invention. detailed description

The technical solutions of the present invention are further elaborated below in conjunction with the accompanying drawings and specific embodiments. An access control method in cell update provided by the present invention includes: During the update process, the HNB GW performs local access control to the UE when it determines that the source HNB and the target HNB do not belong to the same CSG, or instructs the CN to perform access control on the UE.

The HNB GW may compare the CSG configuration information of the source HNB with the CSG configuration information of the target HNB. If the two are the same, determine that the source HNB and the target HNB belong to the same CSG; otherwise, determine that the source HNB and the target HNB are not the same. CSG.

When the HNB GW determines that the UE and the target HNB support the CSG, the CN is instructed to perform the access control on the UE, and the indication message may be an existing Radio Access Network Application Part (RANAP) message. It is a new RANAP message. The indication message needs to carry at least the CSG configuration information of the target HNB and the identifier of the UE. specific:

The HNB GW sends a UE access control judgment message to the CN, where the message carries the CSG configuration information of the target HNB and the identifier of the UE; the CN performs the access control judgment according to the information carried in the UE access control judgment message, if the target HNB is If the CSG identity of the target HNB is not in the allowed CSG list of the UE, the access control result is a failure;

If the target HNB is in the closed access mode, and the CSG identifier of the target HNB exists in the allowed CSG list of the UE, the access control result is successful.

If the target HNB is a hybrid (Hybrid) access mode, the access control result is successful; and if the CSG identity of the target HNB exists in the allowed CSG list of the UE, it is determined that the UE is a member of the target HNB, if the CSG of the target HNB If the identifier is not in the allowed CSG list of the UE, it is determined that the UE is a non-member of the target HNB.

When it is determined that the UE or the target HNB does not support the CSG, the HNB GW performs the access control to the UE locally, specifically: if the IMSI of the UE does not exist in the IMSI list of the target HNB, the access control result is a failure; if the UE The IMSI exists in the IMSI list of the target HNB, and the access control result is successful.

When the access control result is successful, the HNB GW continues the cell update process; in the access control When the result is a failure, the HNB GW terminates the cell update procedure.

As a preferred embodiment of the present invention, in the cell update process of the UE, the HNB GW performs collision detection on the U-RNTI allocated by the target HNB for the UE and the U-RNTI allocated by the other HNBs in the HNB GW. Therefore, the problem that multiple HNBs in one HNB GW have the same RNC-Id in the prior art, and the target cell cannot locate the source HNB through the RNC-Id provided by the UE is solved.

The access control method in the above cell update will be further described in detail below with reference to specific embodiments.

The first embodiment of the present invention describes an access control procedure when a UE performs cell update, where the embodiment describes that the target cell and the source cell of the cell update have different CSGs, and the UE supports the CSG. In this embodiment, the source HNB and the target HNB are connected to the same HNB GW, and the corresponding cell is a neighboring cell, and the HNB GW is connected to the CN. As shown in Figure 3, the main steps are as follows:

Step 301: The source HNB and the target HNB are respectively registered with the HNB GW, and the sent REGISTER REQUEST message carries information such as HNB-Id, Cell-Id, and CSG-Id.

In step 302, the UE initially accesses the source HNB, and the source HNB registers the UE to the HNB GW, and in this step or subsequent steps, the U-RNTK allocated by the source HNB to the UE is recorded as the source U-RNTI, and the HNB GW, HNB is notified. The GW records the source U-RNTI of this UE and the HNB where the UE is currently located.

Step 303: The UE enters a CELL-FACH state, and the UE reselects the target HNB due to a change in the mobile or wireless signal.

Step 304: The UE sends a cell update message to the target HNB.

Step 305: The target HNB sends a UE signaling transmission message to the HNB GW, where the message belongs to the HNB Application Part (HNBAP, HNB Application Part) signaling, where the source U-RNTI, the target RNC-Id, and the Cell-Id are carried. Including the U-RNTI allocated by the target HNB to the UE (denoted as Target U-RNTI).

Step 306: The HNB GW finds the context (Context-Id) of the UE and the corresponding source HNB according to the source U-RNTI in the UE signaling transmission message and the information recorded in step 302. The HNB GW according to the information in step 301. And determining that the source HNB and the target HNB do not belong to the same CSG, and send a UE access control determination message to the CN, where the message carries the CSG configuration information of the target HNB, and the identifier of the UE, where the CSG configuration information of the target HNB includes the target HNB. The CSG-Id, the access mode of the target HNB, the identifier of the UE may be the IMSI of the UE or the Temporary Mobile Subscriber Identity (TMSI) of the UE, or may be represented by the Iu signaling link number of the UE.

Step 307, CN accesses the UE according to the information provided by the HNB GW in step 306.

The HNB performs access control judgment. If the target HNB is in the closed access mode and its CSG-ID is not in the Allowed CSG List of the UE, the access control result is a failure; if the target ΗΝΒ is in the closed access mode, and its CSG- If the ID exists in the Allowed CSG List of the UE, the access control result is successful. If the target HNB is in the hybrid (Hybrid) access mode, the access control result is successful, if its CSG-ID exists in the Allowed CSG List of the UE. In the case, the UE is a member of the target HNB, and vice versa. The CN returns the judgment result to the HNB GW. When the target HNB is in the Hybrid access mode, the judgment result includes the access membership information of the UE (that is, whether the UE is a member of the target HNB).

Step 308: When the access control result is that the UE cannot access the target HNB, that is, the CSG of the HNB is not in the Allowed CSG List of the UE, the HNB GW notifies the target HNB that the access control fails, and the target HNB receives the access control failure message. The RRC connection of the UE is released or the UE is handed over to another cell, and the cell update procedure is ended.

The following steps occur when the access control result is that the target HNB allows the UE to access: Step 309: The HNB GW sends a UE signaling transmission message to the source HNB, where the content of the message update message, the Context-Id of the UE, and the RNC are carried. -Id, Cell-Id of the target cell. Step 310: The source HNB decides to initiate a handover process, and prepares for handover.

Step 311: The source HNB initiates a handover process to the target HNB. If the target HNB is in the hybrid access mode, the access membership information of the UE is also notified to the target HNB in the process. The switching process of the source HNB to the target HNB is the same as the existing process, and is not described here.

Steps 312-313: The target HNB sends a cell update acknowledgement message to the UE, and the UE returns a physical channel re-allocation complete message to the target HNB, thereby completing the cell update procedure.

Step 314, the target HNB notifies the HNB GW that the cell update is complete.

Step 315: Optionally, the HNB GW initiates a UE registration process of the source HNB.

Through the above steps, the process of updating the terminal cell to the target HNB is completed, including the process of access control.

The second embodiment of the present invention describes an access control procedure when the UE performs cell update, where the embodiment describes that the target cell and the source cell of the cell update have different CSGs, and the UE does not support the CSG. In this embodiment, the source HNB and the target HNB are connected to the same HNB GW, and the corresponding cell is a connected cell. As shown in FIG. 4, the method includes the following steps: Step 401: The source HNB and the target HNB are respectively registered with the HNB GW, and the sent registration request message carries information such as HNB-Id, Cell-Id, and CSG-Id.

Step 402: The UE initially accesses the source HNB, and the source HNB registers the UE with the HNB GW, and in this step or the subsequent step, the U-RNTK allocated by the source HNB for the UE is recorded as the source U-RNTI, and the HNB GW, HNB is notified. The GW records the source U-RNTI of this UE and the HNB where the UE is currently located.

Step 403: The UE enters the CELL-FACH state, due to changes in mobile or wireless signals, etc.

The UE reselects the target HNB.

Step 404: The UE sends a cell update message to the target HNB.

Step 405: The target HNB sends a UE signaling transmission message to the HNB GW, where the message belongs to the HNBAP signaling, and carries the source U-RNTI, the target RNC-Id, and the Cell-Id, and optionally includes the U- allocated by the target HNB to the UE. RNTI (denoted as target U-RNTI). Step 406: The HNB GW finds the Context-Id of the UE and the corresponding source HNB according to the source U-RNTI in the UE signaling transmission message and the information recorded in step 402. The HNB GW determines the source HNB according to the information in step 401. If the target HNB does not belong to the same CSG, and the UE does not support the CSG or the target HNB does not support the CSG, the HNB GW performs an access control judgment on the UE. If the IMSI of the UE does not exist in the IMSI list of the target HNB, the access is performed. The control result is a failure. If it exists in the IMSI list of the target HNB, the access control result is successful.

Step 407: When the access control result is that the UE cannot access the target HNB, that is, the IMSI of the UE is not in the IMSI list of the target HNB, the HNB GW notifies the target HNB that the access control fails, and the target HNB receives the access control failure message. And releasing the RRC connection of the UE or switching the UE to another cell, and ending the cell update procedure.

The following steps occur when the access control result is that the target HNB allows the UE to access: Step 408: The HNB GW sends a UE signaling transmission message to the source HNB, where the content of the message update message, the Context-Id of the UE, and the RNC are carried. -Id, Cell-Id of the target cell.

Step 409: The source HNB decides to initiate a handover process, and prepares for handover.

Step 410: The source HNB initiates a handover process to the target HNB, and the process is the same as the existing process, and details are not described herein again.

Steps 411 to 412, the target HNB sends a cell update acknowledgement message to the UE, and the UE returns a physical channel re-allocation complete message to the target HNB, thereby completing the cell update procedure.

Step 413: The target HNB notifies the HNB GW that the cell update is completed.

Step 414: Optionally, the HNB GW initiates a UE registration process of the source HNB.

Corresponding to the access control method in the cell update, the present invention further provides an access control system in a cell update, including: a UE performing a cell update process, an HNB GW, a source HNB, and a target HNB. The HNB GW is configured to perform access control on the UE locally when it is determined that the source HNB and the target HNB do not belong to the same CSG, and the UE or the target HNB does not support the CSG. The access control system in another cell update includes: a UE that performs a cell update procedure, a HNB GW, a source HNB, and a target HNB, and further includes a CN. The HNB GW is configured to: when determining that the source HNB and the target HNB do not belong to the same CSG, and the UE and the target HNB support the CSG, instruct the CN to perform access control on the UE. CN, configured to perform access control on the UE according to the indication of the HNB GW.

Preferably, the HNB GW is further configured to perform collision detection on the U-RNTI allocated by the target HNB for the UE and the U-RNTI allocated by the other HNBs in the HNB GW in the cell update process of the UE.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A method for controlling access in a cell update, the method comprising: in a cell update process of a user terminal (UE), a home base station gateway (HNB GW) determining a source home base station (HNB) and a target When the HNB does not belong to the same closed subscriber group (CSG), the access control to the UE is performed locally, or the core network (CN) is instructed to perform access control on the UE.

The access control method in the cell update according to claim 1, wherein the method further comprises: comparing, by the HNB GW, CSG configuration information of the source HNB with CSG configuration information of the target HNB, if both If yes, it is determined that the source HNB and the target HNB belong to the same CSG; otherwise, it is determined that the source HNB and the target HNB do not belong to the same CSG.

The access control method in the cell update according to claim 2, wherein the method further comprises: when determining that both the UE and the target HNB support CSG, the HNB GW instructs the CN to perform handover to the UE Into the control, specifically:

If the target HNB is in the closed access mode, and the CSG identifier of the target HNB exists in the allowed CSG list of the UE, the access control result is successful;

If the target HNB is in the hybrid access mode, the access control result is successful; and if it is a member of the target HNB, if the CSG identity of the target HNB is not in the allowed CSG list of the UE, determining that the UE is the target Non-member of HNB.

4. The access control method in cell update according to claim 2, wherein The method further includes: when determining that the UE or the target HNB does not support the CSG, the HNB GW performs local access control to the UE, specifically:

The access control method in the cell update according to claim 3 or 4, wherein the method further comprises: the HNB GW continuing the cell update process when the access control result is successful; When the incoming control result is a failure, the cell update process is terminated.

The access control method in the cell update according to any one of claims 1 to 4, wherein the method further comprises: in a cell update process of the UE, the HNB GW allocates the target HNB to the UE. The U-RNTI performs collision detection with the U-RNTI allocated by other HNBs under the HNB GW.

An access control system in a cell update, where the system includes: a UE, an HNB GW, a source HNB, and a target HNB that perform a cell update process, where

The access control system in the cell update according to claim 7, wherein the HNB GW is further configured to perform local access to the UE when determining that the UE or the target HNB does not support the CSG. control.

The access control system in the cell update according to claim 7 or 8, wherein the HNB GW is further configured to: in the cell update process of the UE, allocate the U-RNTI allocated by the target HNB to the UE. The U-RNTI allocated by the other HNBs under the HNB GW performs collision detection.

An access control system in a cell update, the system comprising: a UE performing a cell update procedure, a HNB GW, a source HNB, and a target HNB, and further comprising a CN, Medium,

The HNB GW is configured to: when determining that the source HNB and the target HNB do not belong to the same CSG, instruct the CN to perform access control on the UE;

The access control system in the cell update according to claim 10, wherein the HNB GW is further configured to: when determining that the UE and the target HNB support the CSG, instruct the CN to perform the connection to the UE Into control.

The access control system in the cell update according to claim 10 or 11, wherein the HNB GW is further configured to: in the cell update process of the UE, allocate the U-RNTI of the target HNB to the UE. The U-RNTI allocated by the other HNBs under the HNB GW performs collision detection.