CN102573075A

CN102573075A - Method of operating user equipment, user equipment and home evolution type Note B

Info

Publication number: CN102573075A
Application number: CN2011104294373A
Authority: CN
Inventors: 吴相喆; 裵亨得; 李升圭; 金埈湜; 曹庆铎; 朴南勋
Original assignee: Electronics and Telecommunications Research Institute ETRI
Current assignee: Electronics and Telecommunications Research Institute ETRI
Priority date: 2010-12-20
Filing date: 2011-12-20
Publication date: 2012-07-11
Also published as: KR20120069207A; KR101746192B1

Abstract

The invention relates to a method of operating a user equipment, a user equipment and a home evolution type Note B. The invention provides a method of operating the user equipment used in the wireless communication system. The method comprises: receiving related information of related adjacent cells, determining whether the ID of the CSG of the system exist in the CSG white list, sending measurement report to the evolution Node B, if at least one of the ID of the CSG exists in the CSG white list. And each one of the ID of the CSG comprises a plurality of Nodes B disposed in the cells, in which the Nodes B provide services, each of the Nodes B is provided with an identified value, namely CSG ID. And each of the ID of the CSG also comprises two or more public CSG ID with common value. The measurement report comprises a plurality of CSGID values existing in the CSG white list of the CSGID.

Description

The evolved Node B of method, subscriber equipment and family of operation subscriber equipment

The rights and interests of the priority that the korean patent application that the application requires to submit on December 20th, 2010 is 10-2010-0130647 number all are herein incorporated it by reference.

Technical field

The present invention relates to radio communication, and more specifically, relate to and being used at the method for the subscriber equipment of wireless communication system control presence of intercell interference and the equipment that uses this method.

Background technology

The 3rd generation partnership projects (3GPP) Long Term Evolution (LTE) system (that is the improvement of Universal Mobile Telecommunications System (UMTS)) is introduced by 3GPP version 8.3GPP LTE system uses OFDM (OFDMA) and in up link, uses single-carrier frequency division multiple access (SC-FDMA) in down link.Enhancing 3GPP LTE (LTE-A) as the evolution of 3GPP LTE is being discussed recently.

In the evolution process of wireless communication technology, just merging heterogeneous network (heterogeneous network).

In heterogeneous network, use macrocell and Microcell (for example, Femto cell and picocell) together.Compare with macrocell, Microcell is the system that covers than existing mobile communication service radius smaller area territory.

In this heterogeneous network, the subscriber equipment (being called " UE " thereafter) that in any of macrocell and Microcell, exists can stand presence of intercell interference, this means the interference that is generated by the signal from other sub-districts.For example; Provide the eNB of family (being called " HeNB " thereafter) of the service of Microcell to provide under the situation of closed subscriber group (CSG) function therein; If not level and smooth the execution transferred when UE gets into this Microcell, then UE continues to communicate by letter with the grand eNB of macrocell, disturbs other UE in the Microcell thus.In addition, because the HeNB in the Microcell makes that the UE that communicates by letter with grand eNB stands to disturb.

Summary of the invention

The invention provides a kind of method and apparatus that can in heterogeneous network, solve the interference problem between grand eNB and the HeNB.

According to an aspect of the present invention, a kind of method of operating that is used for the subscriber equipment (UE) of wireless communication system is provided, has comprised: the system information that receives relevant neighbor cell; Confirm whether a plurality of closed subscriber groups (CSG) ID that comprises in this system information is present in the white tabulation of CSG; If as confirming that the result confirms that among said a plurality of CSG ID at least one is present in the white tabulation of this CSG, then sends measurement report to evolved Node B (eNB).Among said a plurality of CSG ID each comprises among a plurality of eNB of family (HeNB) that in the macrocell that this eNB served, exist each having unique CSG ID of unique value and for the two or more public CSG ID with common value among said a plurality of HeNB.This measurement report comprises the CSG ID value that in the white tabulation of this CSG, exists among said a plurality of CSG ID.

This neighbor cell can be the zone that HeNB served that exists in this macrocell.

This method further comprises: receive first radio resource control (RRC) connection from eNB and reconfigure message, send RRC connection to eNB and reconfigure completion message, and send the Physical Cell Identifier symbol (PCI) of neighbor cell to eNB.The one RRC connection reconfigures the message that message can be the PCI of request neighbor cell.

This method further comprises: receive the 2nd RRC from eNB and connect and to reconfigure message, and transmit the 2nd RRC to eNB and be connected and reconfigure completion message.The 2nd RRC connects and to reconfigure the message of report that message can be the system information of request neighbor cell.

This system information can comprise system information block (SIB) and main (Master) block of information (MIB) of neighbor cell.This SIB can comprise unique CSG ID and public CSG ID.This system information can be by the HeNB broadcasting of neighbor cell.

According to a further aspect in the invention, a kind of UE is provided, has comprised: radio frequency (RF) unit is configured to send and receive radio signals; Memory; And processor, be couple to this RF unit and this memory.This RF unit receives the system information of relevant neighbor cell.This memory stores CSG tabulates in vain.This processor confirms whether there are a plurality of CSG ID that comprise in this system information in the white tabulation of this CSG, and if as confirming that the result confirms to have at least one among a plurality of CSG ID in the white tabulation of CSG, then send measurement report to eNB.Among said a plurality of CSG ID each comprises among a plurality of HeNB that in the macrocell that this eNB served, exist each having unique CSG ID of unique value and for the two or more public CSG ID with common value among said a plurality of HeNB.This measurement report comprises the CSG ID value that in the white tabulation of this CSG, exists among said a plurality of CSG ID.

According to a further aspect in the invention, a kind of HeNB is provided, has comprised: the RF unit is configured to send and receive radio signals; Memory; And processor, be couple to this RF unit and this memory.This RF unit transmitting system information.This processor generates this system information that comprises a plurality of CSG ID.Among said a plurality of CSG ID each comprises the public CSG ID that has unique CSG ID of unique value and have common value for two or more HeNB for each HeNB.

Description of drawings

Fig. 1 shows the figure of wireless communication system;

Fig. 2 shows the block diagram that the function between E-UTRAN and the EPC is separated;

Fig. 3 (a) shows X2 user plane interface X2-U, and Fig. 3 (b) shows X2 control plane interface X2-CP;

Fig. 4 shows the figure that wherein in macrocell, has the example of Microcell;

Fig. 5 (a) and 5 (b) show the figure of method that is used to be connected grand eNB and HeNB according to the embodiment of the invention;

Fig. 6 shows X2 immigration (inbound) and transfers processing;

Fig. 7 shows the figure according to the ANR processing of the grand eNB of the embodiment of the invention;

Fig. 8 shows the figure that transmits the processing of measurement report according to the UE of the embodiment of the invention;

Fig. 9 shows the figure that the S1 between grand eNB and HeNB connects;

Figure 10 and 11 shows according to the S1 immigration between grand eNB and HeNB of the embodiment of the invention and transfers the figure that handles; With

Figure 12 shows the block diagram according to the configuration of the HeNB of the embodiment of the invention and UE.

Embodiment

, will with reference to accompanying drawing describe embodiments of the invention, and make them easily to realize by those skilled in the art thereafter.

Fig. 1 shows the figure of wireless communication system.This wireless communication system can illustrate the network configuration of 3GPPLTE/LTE-A.E-UTRAN (evolution UMTS terrestrial radio Access Network) comprises base station (BS) 20, to UE 10 control plane and user plane is provided.

UE 10 can be that fix or mobile, and can be called as another term, such as mobile radio station (MS), user terminal (UT), subscriber station (SS), portable terminal (MT) or wireless device.

BS 20 refers to the fixed station of communicating by letter with UE 10, and can be called as another term, such as evolved Node B (eNB), base station transceiver system (BTS) or access point.

One or more sub-districts can exist in a BS 20.Here, the sub-district refers to wherein BS 20 service available zones (that is BS 20 region covered).

BS 20 is connected to evolution grouping kernel (EPC) through the S1 interface.More specifically, BS 20 is connected to Mobility Management Entity (MME) through S1 control plane interface (being called S1-MME), and is connected to gateway (S-GW) through S1 user plane interface (being called S1-U).The S1 interface is supported the many-to-many relationship between BS 20 and the MME/S-GW 30.

Can between BS 20, be used for the professional interface that transmits of customer service or control.For example, BS 20 can be through the X2 interface interconnection.X2 interface comprises user plane interface X2-U and control plane interface X2-CP.

Fig. 2 shows the block diagram that the function between E-UTRAN and the EPC is separated.Oblique line frame indication radio protocol layers, and the functional entity of white edge indication control plane.Each functions entity is described below.

BS carries out following function.

(1) (RB) controls, the radio access control, connects mobility control and such as radio bearer (Bearer) for example to the function of the provided for radio resources management (RRM) of the Dynamic Resource Allocation for Multimedia of UE.(2) deciphering of Internet Protocol (IP) header-compressed and customer traffic.(3) user plane data is to the route of S-GW.(4) scheduling of beep-page message and transmission.(5) scheduling of broadcast message and transmission.(6) scheduling of mobility measurements and measurement report and configuration.

MME carries out following function.

(1) Non-Access Stratum (NAS) signaling.(2) NAS signalling security.(3) idle pulley UE accessibility.(4) tracking zone list management.(5) roaming function.(6) authentication.

S-GW carries out following function.

(1) mobility grappling.(2) lawful intercept.

PDN-gateway (P-GW) is carried out following function.

(1) UE IP distributes.(2) packet filtering.

The physical layer of radio protocol layers (PHY) uses physical channel to high level more information transfer service to be provided.Physical layer is connected to medium access control (MAC) layer (that is, more high-rise) through transmission channel.Data move between MAC layer and physical layer through transmission channel.How to transmit according to what characteristic according to data, come transmission channel is classified through radio interface.In addition, data move through the physical channel of (that is, between the physical layer of transmitter and receiver) between the different physical layers.Can in physical layer, use physical control channel.The MAC layer has following function, such as mapping between logic channel and transmission channel and will belong to the MAC service data unit (SDU) of logic channel multiplexed/separate and be multiplexed to the transmission block that physical channel provides.

The MAC layer provides service through logic channel to radio link control (RLC) layer.Logic channel can be classified as control channel that is used for transmitting control district information and the Traffic Channel that is used to transmit user area information.

Rlc layer has such as the cascade of RLC SDU, the function cutting apart and recombinate.

Packet data polymerized agreement (PDCP) layer in the user plane has transmission, header-compressed such as user data and the function of encrypting.PDCP layer in the user plane has the function such as transmission, encryption and the integrity protection of control plane data.

Radio resource control (RRC) layer only defines in control plane.Rrc layer relate to RB configuration, reconfigure and discharge, and it is responsible for the control of logic channel, transmission channel and physical channel.

RB refers to the logical path that is used for the data passes between UE and the network that is provided by the ground floor (that is PHY layer) and the second layer (that is, MAC layer, rlc layer and PDCP layer).Term " content that RB was configured " refers to the characteristic of defined radio protocol layer and channel so that special services is provided and disposes detail parameters and the processing of method of operation.

Fig. 3 A shows X2 user plane interface X2-U, and Fig. 3 B shows X2 control plane interface X2-CP.

X2-U provides user plane PDU the transmission of (protocol Data Unit).The protocol stack of X2-U comprises physical layer, data link layer, IP, UDP (UDP) and the GPRS Tunnel Protocol (GTP-U) according to this order.The protocol stack of X2-U is identical with the protocol stack of S1 user plane.

The protocol stack of X2-CP comprises physical layer, data link layer, IP and the SCTP (SCTP) according to this order.X2-AP refers to the X2 application protocol.

The method of generable interference under the situation that is used to be reduced in the BS coexistence that wherein has different service area sizes is described below.Simple and clear in order to describe, at first define term.

Thereafter, grand eNB (or abbreviating eNB as) is used for mobile communication and the eNB that uses, and it refers to the public extensive eNB that installs at the place, fixed position.Wherein grand eNB provides the zone of service to be called as macrocell.Macrocell can be used as the implication identical with grand eNB.

HeNB refers to the eNB that has littler service area than grand eNB, and it can be called as another term, such as slight eNB or femto eNB.HeNB can mainly install within the family, but is not limited thereto.For ease, wherein HeNB provides the zone of service to be called as Microcell.Microcell can be used as the implication identical with HeNB.Microcell can be present in the macrocell, and in a macrocell, has a plurality of Microcells.HeNB can not have to use in the communication shadow region that covers, the zone that needs a lot of data, services and the so-called hot-zone at grand eNB only.

HeNB can be according to various pattern operations.For example, HeNB can be according to open mode, closed subscriber group (CSG) pattern and mixed mode operations.Open mode is wherein to allow to HeNB registration and the operator scheme that does not insert to all UE of HeNB registration.The CSG pattern is wherein only to allow the operator scheme that inserts except the UE to the HeNB registration to the UE of HeNB registration not.Under the situation of HeNB according to CSG pattern operation, only as UE as the member when HeNB subscribes (that is, to the HeNB registered UE), UE can communicate by letter with HeNB.If UE does not also subscribe (that is, also not to the HeNB registered UE) as the member to HeNB, then UE can not communicate by letter with HeNB.Mixed mode is the operator scheme of wherein mixing and operating this open mode and this CSG pattern.Suppose that HeNB is according to CSG pattern operation and do not allow HeNB to change its operator scheme when the operation thereafter.Here, get rid of (when operation HeNB, disturb when exceeding predetermined level) changes into the operator scheme of HeNB mixed mode from the CSG pattern situation.

According to traditional 3GPP standard, the HeNB that operates according to the CSG pattern broadcasts CSG ID (sign) as system information.HeNB has a CSG ID.That is, HeNB has the unique ID relevant with CSG, and the ID of HeNB is called as CSG ID (maybe can be called as unique CSG ID).UE can have the tabulation of UE as the CSG ID of the HeNB under the member.The tabulation of CSG ID is called as CSG and tabulates in vain.For example, the white tabulation of CSG can be stored in subscriber identity module (SIM) card of UE.The white tabulation of CSG can change according to the request of UE or according to the order of network.

HeNB makes that through the CSG ID of the system information transmission CSG that HeNB supported only the member UE of corresponding CSG can insert HeNB.When detecting the CSG sub-district, UE can check which CSG the CSG sub-district supports through the CSG ID that comprises in the read system information.Only when UE is the member of corresponding CSG sub-district (, only when the CSG ID of corresponding CSG sub-district is included in the white tabulation of its oneself CSG), the UE that has read CSG ID can regard corresponding CSG sub-district as sub-district that UE can insert.

Fig. 4 shows the figure that wherein in macrocell, has the example of Microcell.

With reference to figure 4, said a plurality of HeNB are present in the macrocell that grand eNB covers, and a plurality of Microcells that exist each HeNB to provide.As stated, HeNB is according to the operation of CSG pattern, and each Microcell can be called as the CSG sub-district through considering this characteristic.

UE can with process that grand eNB communicates by letter in get into the CSG sub-district.In this case,, then there be not the problem relevant, because normal the execution transferred with interference if UE has subscribed the CSG sub-district.Yet if UE does not also subscribe the CSG sub-district, UE continues to communicate by letter with grand eNB.As a result, UE disturbs to other UE with the CSG cell communication, and also stands such interference.The method and apparatus that is used to solve interference problem is described below.

Fig. 5 shows the figure of method that is used to connect grand eNB and HeNB according to the embodiment of the invention.

With reference to figure 5, HeNB can be connected to MME/S-GW via HeNB GW.Here, can between HeNB and HeNB GW, use S1 interface or X2 interface, and can between HeNB GW and MME/S-GW, use the S1 interface.

Can between eNB and HeNB, use X2 interface.HeNB can use X2 interface to be connected to eNB via HeNB GW shown in Fig. 5 (a), perhaps can shown in Fig. 5 (b), need not HeNB GW and uses X2 interface to be directly connected to eNB.

In traditional eNB and HeNB, do not use X2 interface.Yet, in the present invention, can use X2 interface to pass through X2 immigration transfer (describing after a while) and carry out the transfer between eNB and the HeNB.That is,, then can between eNB and HeNB, use the X2 immigration to transfer if use method of attachment such as Fig. 5 (a) or Fig. 5 (b).For example, communicate by letter with eNB and move under the situation of CSG sub-district of HeNB, can carry out the X2 immigration and transfer at UE.

Fig. 6 shows the X2 immigration and transfers processing.

With reference to figure 6, source eNB sends the RRC connection at step S610 to CSG UE and reconfigures message (that is, RRC connection reconfigures message).Source eNB can connect physical district ID (PCI) report that reconfigures the relevant neighbor cell of message request through this RRC.PCI can be any among the predetermined number ID.For example, PCI can be one of 504 ID.CSG UE sends the RRC connection at step S620 to source eNB and reconfigures completion message.The signal that CSG UE monitoring neighbor cells is transmitted.

CSG UE obtains the PCI of neighbor cell based on the synchronous channel signal of neighbor cell, and through measurement report message PCI is sent to source eNB.Be called as Target cell from its neighbor cell that has obtained PCI, and the HeNB of Target cell is called as target HeNB.Synchronizing channel can be BCCH (BCCH) for example, and synchronous channel signal can be master sync signal (PSS) and auxiliary synchronous signals (SSS).PSS and SSS transmit in the down link of neighbor cell so that help Cell searching.PCI and slot synchronization can be obtained through detecting PSS.The length of Cyclic Prefix (CP), physical-layer cell group ID and frame synchronization can be obtained through detecting SSS.

Source eNB sends the RRC connection to CSG UE and reconfigures message (that is, the 2nd RRC connection reconfigures message).Source eNB connects system information block (SIB) and the main block of information (MIB) that reconfigures the message request Target cell through this RRC.SIB tectonic system information, and SIB comprises the set of the parameter that function is relevant.The SIB Class1 message of SIB comprises whether relevant CSG UE can insert the information of respective cell.This SIB Class1 message comprises the information of relevant scheduling on the time domain of residue SIB.

This MIB among the SIB go up to transmit at Physical Broadcast Channel (PBCH), and comprises the indispensable a limited number of the most frequently parameter of transmission of initial access sub-district institute.For example, MIB can comprise the information of relevant downlink cell bandwidth, Physical HARQ Indicator Channel (PHICH) information configured and the system frame number (SFN) of relevant sub-district.The RRC connection reconfigures message and can comprise gap information.Consider that the time that SIB and MIB spent of CSG UE decoding Target cell uses this gap information.

CSG UE sends the RRC connection to source eNB and reconfigures completion message, and obtains the MIB and the SIB information of relevant Target cell.

CSG UE carries out preliminary access control processing in the MIB and the SIB information of step S630 based target sub-district.Carry out preliminary access control and handle, so that confirm in the white tabulation of the CSG of CSG UE, whether to exist the CSG ID of Target cell.

If in the white tabulation of the CSG of CSG UE, there is the CSG ID of Target cell, then CSG UE sends to source eNB at step S640 and comprises the CSG ID of Target cell and the measurement report message of CSG member condition information.

Source eNB determines whether (Ho) transferred in execution at step S650, and sends the transfer request message at step S660 to target HeNB.This transfer request message comprises the CSGID that is called as target CS G ID.

Target HeNB confirms that at step S670 target CS G ID is whether identical with the CSG ID that target HeNB is broadcasted.If as confirming that this target CS G ID is identical with this CSG ID as a result, then target HeNB sends to source eNB at step S680 and transfers request ACK message.

Source eNB sends the RRC connection that comprises the mobility control information at step S690 once more to CSG UE and reconfigures message, and changes message at step S700 to target HeNB transmit status.This state-transition message can be the message that is used to transmit the PDCP state information.

CSG UE sends the RRC connection at step S710 to target HeNB and reconfigures completion message.Target HeNB at step S720 to MME transmit path handoff request message.MME is in the modification of step S730 to S-GW request carrier, and replys modification message at step S740 from the S-GW received vector.MME at step S750 to target HeNB transmit path handoff request ACK message.

In S1 immigration hand-over, carry out twice access control and handle (that is, preliminary access control processing among the CSG UE and the auxiliary access control among the MME are handled), and in above X2 immigration hand-over, CSG UE only carries out preliminary access control and handles.

Following table shows the SIB Class1 message according to the HeNB of the embodiment of the invention.

[table 1]

Reference table 1 further comprises the common CSG ID that uses in a plurality of HeNB in the existing SIB Class1 message according to the SIB Class1 message that HeNB of the present invention broadcasted.That is, said a plurality of CSG ID can be included in the system information that HeNB broadcasts.For example, as in the table 1, can in SIB Class1 message, define the new argument that is called " csg-Identity-Common ".For convenience's sake, this parameter is called as public CSG ID.

That is, traditional HeNB has a CSG ID.Yet, have existing CSG ID and public CSG ID according to HeNB of the present invention.The CSG ID of each HeNB has unique value, but a plurality of HeNB can have equal values in public CSG ID.For example, can in macrocell, there be three HeNB, such as HeNB#1, HeNB#2 and HeNB#3.In this case, HeNB#1 can have 3 CSG ID and 0 public CSG ID.HeNB#2 can have 4 CSG ID and 0 public CSG ID.In addition, HeNB#3 can have 7 CSG ID and 0 public CSG ID.

In addition, CSG UE according to the present invention is configured to not only comprise the CSG ID of HeNB, and comprises the public CSG ID in the white tabulation of its CSG.CSG UE can store CSG ID and public CSG ID in its SIM.

Fig. 7 shows the figure that handles according to the automatic neighbouring relations (ANR) of the grand eNB (eNB) of the embodiment of the invention.

ANR is through adopting UE to identify the function of the eNB of available adjacent eNB.ENB can ask UE to report the PCI and the evolution sub-district global identifier (ECGI) of adjacent eNB based on the information of the adjacent eNB of being broadcasted.ECGI is unique ID that gives the sub-district.Different with PCI, ECGI has unique value in each sub-district.ENB can manage the information of relevant adjacent eNB according to the form of neighbouring relations table (NRT).ENB adds this new adjacent eNB to its NRT when detecting new adjacent eNB, and if eNB no longer be adjacent eNB, then from this eNB of NRT removal.

In Fig. 7, suppose that CSG UE supports the CSG function, and in the white tabulation of the CSG that in its SIM, stores CSG ID=10 and public CSG ID=0 are set.The CSG HeNB that also supposes Microcell B has CSG ID=7, public CSG ID=0, PCI=5 and ECGI=19.ENB can ask the measurement report of CSG UE report neighbor cell.In response to this request, when detecting neighbor cell, CSG UE comprises the measurement report (step 1) of the PCI value (that is, 5) of neighbor cell to the eNB report.

ENB request CSG UE report has the ECGI value (step 2) of the sub-district of PCI=5.

In response to this request, CSG UE obtains ECGI, CSG ID and the public CSG ID (step 3) of neighbor cell through MIB that BCCH broadcasted and the SIB of the CSG HeNB of neighbor cell (that is, Microcell B).CSG UE passes through to compare the CSG ID of neighbor cell and the CSG ID and the public CSG ID of public CSG ID and storage in the white tabulation of its CSG, checks whether there is identical information.

If identical with CSG ID and among the public CSG ID at least one of storage in the white tabulation of CSG of CSG UE as among the CSG ID of check result, neighbor cell and the public CSG ID at least one, then CSG UE sends CSG ID or the public CSG ID (step 4) identical with ECGI to eNB.

If the ID relevant with CSG of the neighbor cell that CSG UE is transmitted is public CSG ID, then eNB execution S1 immigration transfer processing or X2 immigration transfer are handled.If the ID relevant with CSG of the neighbor cell that CSG UE is transmitted is CSG ID, then eNB can carry out S1 immigration transfer or X2 immigration transfer as prior art.Transfer in X2 immigration and to handle, whether the target CS G ID that comprises in the CSG HeNB inspection transfer request message that eNB transmitted is identical with CSG ID or the public CSG ID that CSG HeNB is broadcasted.If as target CS G ID and CSG ID or the identical result of public CSG ID, then the operation of the communication of CSG UE hands over to CSG HeNB from eNB.

Fig. 8 shows the figure that transmits the processing of measurement report according to the UE of the embodiment of the invention.

With reference to figure 8, eNB reception RRC connection reconfigures message to UE from the source at step S810.UE sends RRC at step S820 to source eNB and connects and reconfigure completion message, and determines whether to exist the signal of the specific or higher level that neighbor cell transmits at step S830 then.

If as confirming that the result confirms to exist the signal of specific or higher level, then UE obtains the PCI of neighbor cell based on the synchronous channel signal of neighbor cell at step S840.UE sends to source eNB with PCI through measurement report message at step S850.Be called as Target cell from its neighbor cell that has obtained PCI, and the HeNB of Target cell is called as target HeNB.

ENB reception RRC connection reconfigures message to UE from the source once more at step S860.Here, source eNB reconfigures MIB and the SIB of message to UE request target sub-district through the RRC connection.

UE sends the RRC connection at step S870 once more to source eNB and reconfigures completion message, and obtains the MIB and the SIB information of relevant Target cell at step S880.

UE carries out preliminary access control processing in the MIB and the SIB information of step S890 based target sub-district.That is, UE confirms in its white tabulation of CSG, whether to exist the ID relevant with CSG (that is, unique CSG ID or public CSG ID) of Target cell.

If as confirming that the ID relevant with CSG that the result confirms in its white tabulation of CSG, to exist Target cell (promptly; Unique CSG ID or public CSG ID), then UE sends to source eNB at step S900 and comprises the ID relevant with CSG of Target cell and the measurement report message of CSG member condition information.Yet if as confirming that the result confirms in its white tabulation of CSG, not exist the ID relevant with CSG of Target cell, it is not the member's under the CSG member condition information that UE sends the indicating target sub-district at step S910 to source eNB.

According to the present invention, a plurality of Microcells in the macrocell can have public CSG ID.That is, each HeNB can have the public CSG ID of unique CSG ID and common value.If each HeNB only has unique CSG ID as in the prior art, then when particular UE gets in the Microcell, can not frequently carry out transfer.In this case, UE continues to communicate by letter with eNB, disturbs to other UE that communicate by letter with HeNB thus.In addition, the UE that communicates by letter with eNB also stands because the interference that HeNB causes makes communication quality demote thus.

On the other hand, according to the present invention, a plurality of HeNB can have public CSG ID, and this public CSG ID can have equal values.Therefore, when UE gets in the Microcell, increase carrying out the possibility of transferring.As a result, owing to UE does not continue to communicate by letter with eNB, so disturb influence to reduce for the UE in the Microcell.

Fig. 9 shows the figure that the S1 between eNB and HeNB connects.

With reference to figure 9, eNB (grand eNB) can be connected to MME/S-GW through the S1 interface, and MME/S-GW and HeNB GW also can be through the interconnection of S1 interface.In addition, HeNB GW and HeNB can be through the interconnection of S1 interface.Can in HeNB, use the X2 immigration hand-over method that passes through X2 interface according to the present invention.Yet as in the prior art, HeNB can stand to transfer from the S1 immigration of eNB through the S1 interface.There is a little difference in S1 immigration transfer through the S1 interface between the present invention and prior art.

Figure 10 and 11 shows according to the S1 immigration between eNB (grand eNB) and HeNB of the embodiment of the invention and transfers the figure that handles.

At first describe traditional S1 immigration and transfer processing.With reference to Figure 10, CSG UE and source eNB exchange RRC is connected and reconfigures message and be connected with RRC and reconfigure completion message, and carries out preliminary access control processing then.CSG UE sends the RRC measurement report to source eNB.Here, the RRC measurement report can comprise target CS G ID and CSG member condition information.Source eNB determines whether execution is transferred, and sends the needs transfer message that indication needs transfer to MME then.Here, this need be transferred message and can comprise target CS G ID.MME carries out access control and handles, and sends to target CS G HeNB then and transfer request message.Whether target CS G HeNB confirms need to transfer the target CS G ID that comprises in the message at this identical with the CSG ID that target CS G HeNB is broadcasted, and determine whether permission is inserted based on definite result.Next, target CS G HeNB sends to MME and transfers request ACK message.MME creates indirect data and transmits tunneled requests and send it to S-GW.S-GW creates indirect data and transmits tunnel acknowledgment and send it to MME.MME sends to source eNB and transfers order.Source eNB sends the RRC connection that comprises the mobility control information to CSG UE and reconfigures message.(that is, macrocell) separates CSG UE from the grown-ups and children district, and its execution and new sub-district (that is Microcell) is synchronous.Source eNB transmits the grouping of the transfer of buffer memory to target CS G HeNB.In addition, source eNB sends the state information of relevant source eNB to MME.MME transmits the MME state information to target CS G HeNB.The grouping of target CS G HeNB eNB reception buffer memory from the source.CSG UE sends the RRC connection to target CS G HeNB and reconfigures completion message.Target CS G HeNB should transfer to the MME notice.MME sends the carrier request message to S-GW.S-GW switches down link (DL) path and sends the carrier response message to MME then.MME sends the release command of UE context to source eNB.Source eNB sends UE context Release complete to MME.The MME deletion is transmitted tunneled requests to the indirect data that S-GW makes.S-GW sends indirect data to MME and transmits tunnel acknowledgment.Illustrated among Figure 10 and 11 in which protocol layer and to have carried out what of each processing.

The difference of method of the present invention and conventional method is to carry out the processing that the S1 immigration is transferred.More specifically, in the prior art, send under the situation of " needing to transfer " message to MME, send unique CSG ID of HeNB to target CS G ID at eNB.Yet, in the present invention, can transmit unique CSG ID of HeNB and any among the public CSG ID.MME is through being to be to carry out access control under the situation of public CSG ID to handle under the situation of unique CSG ID but also at target CS G ID at target CS G ID not only, transfers request message and send to HeNB.

Whether HeNB confirms from target CS G ID that MME received identical with unique CSG ID or the public CSG ID that HeNB is broadcasted.If identical as confirming result, the unique CSG ID or the public CSG ID that are broadcasted from target CS GID and HeNB that MME received, then HeNB sends " transfer and ask ACK " message to MME.Residue is handled and can as processing is transferred in traditional S1 immigration, be carried out.

In other words, the difference of the present invention and prior art is, handles in the access control of MME and handles with the access control of HeNB, not only considers the unique CSG ID of HeNB but also the public CSG ID of consideration HeNB.

Figure 12 shows the block diagram according to the configuration of the HeNB of the embodiment of the invention and CSG UE.

With reference to Figure 12, HeNB 110 comprises radio frequency (RF) unit 111, memory 112 and processor 113.RF unit 111 sends and receives radio signals, and can comprise antenna and power amplifier.The driver of memory 112 storage HeNB 110, and the buffer memory of responsible radio signal.Processor 113 is the processor controls that link to each other with memory 112 with RF unit 111, and is configured to operate HeNB110.Processor 113 is carried out the function of above-mentioned HeNB.For example, processor 113 can receive from eNB and transfer request signal, confirms the validity (validity) of CSG ID or public CSG ID, and sends and transfer the request ack signal.In addition, processor 113 can be broadcasted unique CSG ID of HeNB or have the public CSG ID of two or more HeNB of common value through BCCH.Processor 113 can generate and transmit signal according to the agreement of S1 interface or X2 interface.Processor 113 can be carried out the function and the L2/L3 function of modulator-demodulator.

CSG UE 120 comprises RF unit 121, memory 123 and processor 122.RF unit 121 sends and receives radio signals, and can comprise antenna and power amplifier.The CSG of memory 123 store drivers, radio signal and CSG UE 120 tabulates in vain.Memory 123 can be made up of SIM.Processor 122 is the processor controls that link to each other with memory 123 with RF unit 121, and is configured to operate CSG UE 120.Processor 122 is carried out the function of above-mentioned CSG UE.For example; Processor 122 can confirm in the white tabulation of its CSG, whether have a plurality of CSG ID that comprise in the system information that HeNB transmitted of neighbor cell; If confirm in the white tabulation of CSG, to have at least one among a plurality of CSG ID as definite result, then send measurement report to eNB.

According to the present invention, (that is, wherein eNB and the HeNB that the CSG function is provided use the situation of same radio resources (for example frequency)) can reduce to disturb the influence to UE under the situation of eNB and the HeNB coexistence that the CSG function is provided therein.In other words, owing to level and smooth carry out eNB and the transfer between the HeNB of CSG function is provided, so can solve the interference problem of UE.

Although based on according to the flow chart of the form of a succession of step in the above-mentioned system shown or square frame and described these methods; But the invention is not restricted to the order of these steps or square frame; And some steps or square frame can be carried out according to the order different with remaining step, or can carry out simultaneously with remaining step.In addition, it will be understood by those skilled in the art that step shown in the flow chart or square frame are not exclusiveness, and under the situation that does not influence scope of the present invention, can comprise other steps or square frame, perhaps can delete one or more steps of flow chart.

The foregoing description comprises the each side of example.Might make up although can not describe the institute that is used to describe each side, one skilled in the art will recognize that other combinations are possible.Therefore, the present invention should be interpreted as every other replacement, modification and the change that comprises within the scope that falls into claim.

Claims

1. method of operating that is used for the subscriber equipment (UE) of wireless communication system, this method comprises:

Receive the system information of relevant neighbor cell;

Confirm whether a plurality of closed subscriber groups (CSG) ID that comprises in this system information is present in the white tabulation of CSG;

When at least one in confirming said a plurality of CSG ID is present in the white tabulation of this CSG, transmit measurement report to evolved Node B (eNB),

Among wherein said a plurality of CSG ID each comprise among a plurality of eNB of family (HeNB) that in the macrocell that this eNB served, exist each have unique value unique CSG ID and for two or more among said a plurality of HeNB have common value public CSG ID and

This measurement report comprises the CSGID value that in the white tabulation of this CSG, exists among said a plurality of CSG ID.

2. according to the process of claim 1 wherein that this neighbor cell is the zone that HeNB served that exists in this macrocell.

3. according to the method for claim 1, further comprise:

Receive first radio resource control (RRC) connection from eNB and reconfigure message;

Transmit RRC connection to eNB and reconfigure completion message; With

The Physical Cell Identifier that transmits neighbor cell to eNB accords with (PCI),

Wherein RRC connection reconfigures the message that message is the PCI of request neighbor cell.

4. according to the method for claim 3, further comprise:

Receive the 2nd RRC connection from eNB and reconfigure message; With

Transmit the 2nd RRC connection to eNB and reconfigure completion message,

Wherein the 2nd RRC connects and to reconfigure the message of report that message is the system information of request neighbor cell.

5. according to the process of claim 1 wherein that this system information comprises the system information block (SIB) and the main block of information (MIB) of neighbor cell.

6. according to the method for claim 5, wherein this SIB comprises unique CSG ID and public CSG ID.

7. according to the process of claim 1 wherein of the HeNB broadcasting of this system information by neighbor cell.

8. UE comprises:

Radio frequency (RF) unit is configured to transmit and receive radio signals;

Memory; With

Processor is couple to this RF unit and this memory,

Wherein this RF unit receives the system information of relevant neighbor cell,

This memory stores CSG tabulates in vain,

This processor confirms in the white tabulation of this CSG, whether have a plurality of CSG ID that comprise in this system information, when confirming in the white tabulation of CSG, to have at least one among a plurality of CSG ID, transmits measurement report to eNB,

Among said a plurality of CSG ID each comprise among a plurality of HeNB that in the macrocell that this eNB served, exist each have unique value unique CSG ID and for two or more among said a plurality of HeNB have common value public CSG ID and

9. according to Claim 8 UE, wherein this neighbor cell is the zone that HeNB served that exists in this macrocell.

10. according to Claim 8 UE; Wherein this processor receives RRC connection from eNB and reconfigures message; Transmit RRC connection to eNB and reconfigure completion message; And transmit the PCI of neighbor cell to eNB, wherein a RRC connects and reconfigures the message that message is the PCI of request neighbor cell.

11. UE according to claim 10; Wherein this processor receives the 2nd RRC from eNB and connects to reconfigure message and to transmit the 2nd RRC to eNB and connect and reconfigure completion message, and wherein the 2nd RRC connects and reconfigures the message of report that message is the system information of request neighbor cell.

12. UE according to Claim 8, wherein this system information comprises the SIB and the MIB of neighbor cell.

13. according to the UE of claim 12, wherein this SIB comprises unique CSG ID and public CSGID.

14. UE according to Claim 8, wherein this system information is by the HeNB broadcasting of neighbor cell.

15. UE according to Claim 8, wherein this memory comprises subscriber identity module (SIM) card.

16. a HeNB comprises:

The RF unit is configured to transmit and receive radio signals;

Memory; With

Processor is couple to this RF unit and this memory,

This RF unit transfer system information wherein,

This processor generate this system information of comprising a plurality of CSG ID and

Among said a plurality of CSG ID each comprises the public CSG ID that has unique CSG ID of unique value and have common value for two or more HeNB for each HeNB.

17. according to the HeNB of claim 16, wherein this system information is broadcasted.