WO2012041118A1

WO2012041118A1 - Method and denb for processing mme direct information transfer signals

Info

Publication number: WO2012041118A1
Application number: PCT/CN2011/077671
Authority: WO
Inventors: 邓云
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-09-29
Filing date: 2011-07-27
Publication date: 2012-04-05
Also published as: CN102438225A; CN102438225B

Abstract

Disclosed is a method for processing mobility management entity (MME) direct information transfer signals. The method comprises: a donor eNB (DeNB) receives MME direct information transfer signals, and upon determining that at least one cell whose report is requested by a heterogeneous system is under the jurisdiction of a relay node (RN), transmits signals to the corresponding RN to request and obtain the wireless access network information of said at least one cell under the jurisdiction of an RN, and then transmits to the MME eNB direct information transfer signals carrying the wireless access network information requested by the heterogeneous system. Also disclosed is a corresponding DeNB. The present invention enables a heterogeneous system, when a DeNB and an RN under the jurisdiction thereof have a same eNB identifier, to successfully obtain the wireless access network information of the cell under the jurisdiction of the RN, thereby ensuring the effective implementation of inter-network load balancing, switching policies, and neighboring cell parameter configuration.

Description

Method for processing direct information transmission signaling of MME and technical field of DeNB

The present invention relates to the field of mobile communications, and in particular, to a method for processing direct information transmission signaling of a Mobility Management Entity (MME) and a DeNB. Background technique

The third-generation mobile communication Long Term Evolution (LTE) system consists of an evolved Evolved Universal Terrestrial Radio Access Network (E-UTRAN), User Equipment (UE), and an evolved packet core. Evolved Packet Core (EPC). The E-UTRAN is composed of an enhanced base station (eNB) of the access network element. The eNB is connected to the terminal UE through the Uu interface, and is connected to the core network element, such as a Mobility Management Entity (MME), through the S1 interface.

To meet the growing demand for high-bandwidth, high-speed mobile access, Third Generation Partnership Projects (3GPP) introduces advanced long-term evolution

(Long-Term Evolution advance, LTE-Advanced) standard. LTE-Advanced retains the core of LTE for the evolution of LTE systems. Based on this, a series of technologies are used to expand the frequency domain and airspace to improve spectrum utilization and increase system capacity. Wireless relay

(Relay) technology is one of the technologies in LTE-Advanced. It aims to extend the coverage of the cell, reduce the dead zone in communication, balance the load, transfer the traffic in the hotspot area, and save the UE's transmit power.

FIG. 1 is a schematic structural diagram of a system using a wireless relay technology in the prior art. As shown in FIG. 1 , a relay node (RN) is connected to a UE through a Uu interface to provide a function of a base station. In addition, the RN is connected to the base station through the Un interface to provide the functions of the UE. The base station connected to the RN is called a donor base station (Doror eNB, DeNB), and the DeNB passes through the SI interface and the core network element (for example, MME) connection. The RN maintains a connection with a core network element (such as an MME) through a DeNB proxy. Thereby, a relay function for data transmission between the RN and the base station and between the RN and the UE managed by itself is implemented, and the coverage of the extended cell is reduced, the dead zone in the communication is reduced, the load is balanced, and the service in the hotspot area is transferred. Save the UE's transmit power and other purposes.

In order to implement the relay function, the RN establishes radio resource control in the cell under the jurisdiction of the access DeNB.

After the (RRC) connection, it is necessary to establish a Data Radio Bearer (DRB) for downloading necessary parameters such as configuration information of the cell under the jurisdiction of the RN from the Operation & Maintenance (O&M) server, and transmitting the RN. The S1 and X2 interface signaling of the UE under the jurisdiction of the cell, the data of the UE under the cell under the jurisdiction of the RN, and the like.

After the RN is introduced into the network, the cell under the jurisdiction of the RN may be associated with other heterogeneous systems (such as the GERAN system or

WCDMA system) There is a neighbor relationship in the cell. For the sake of load balancing, other heterogeneous systems may switch some UEs in the connected state to the cell under the jurisdiction of the RN. Before implementing load balancing, different systems need to first obtain the load information of the cell under the jurisdiction of the RN. In the existing protocol, the LTE system obtains the load information of the LTE cell through the RIM (Radio Access Network Information Management) process. It should be noted that the LTE system can also obtain the load of other system cells through the RIM process.

In the RIM process, a network element that initiates information acquisition of radio access network information of other systems is called a Controlling Base System (Controlling BSS), and a network element that provides radio access network information is called a Serving BSS, which controls the base station system and The serving base station system needs to support the Base Station Subsystem GPRS Protocol (BSSGP). The control base station system sends a RIM Information Request PDU to the serving base station system through the core network, where the request PDU includes a RIM Container (RIM Container) and RIM Routing Information (RIM Routing Information) ₀ in the RIM container. Contains RIM Application Identity, Application Container, and RIM Sequence Number. The RIM application layer identifier contains a letter that needs to acquire a cell. Contents such as SON Transfer, System Information, MBMS data channel, etc. (need to obtain the information content of the cell), where SON Transfer refers to the information including the cell load report (Cell Load Reporting); and the application layer container contains the cell identifier to be acquired. It is also called the cell identifier to be reported or the cell identifier called Reporting Cell Identifier (Reporting here means that Serving BSS returns to Controlling BSS). The RIM routing information includes a source cell identifier (Source Cell Identifier) and a target cell identifier ( Destination Cell Identifier ).

It should be noted that, if it is a BSS in the GERAN system, the source or target cell identifier (Source Cell Identifier or Destination Cell Identifier) is the identifier of the cell under the jurisdiction of the BSS; if it is the RNC in the WCDMA system, the source or target The identifier of the cell (Source Cell Identifier or Destination Cell Identifier) refers to the identifier of the RNC. If it is the eNB in the LTE system, the source or destination cell identifier (Source Cell Identifier or Destination Cell Identifier) is the eNB identifier in LTE (here) It does not refer to the identity of the cell under the jurisdiction of the eNB). The existing protocol uniformly uses the identity of the source cell and the identity of the target cell when defining the routing information because the cell is used for routing in the GERAN system. After the introduction of the WCDMA system and the LTE system, the routing information is different (in WCDMA). The route is identified by the RNC; in LTE, the eNB is used to identify the route, and the meaning of the source cell identifier (Source Cell Identifier) and the target cell identifier ( Destination Cell Identifier) has changed.

After the RN is introduced into the LTE system, the base station identifier (eNB ID) of the RN is the same as the base station identifier of the DeNB to which it accesses. If the BSS or the RNC wants to obtain the information of the cell managed by the RN managed by the DeNB, the MME direct information transmission signaling sent by the BSS or the RNC through the core network will be terminated by the DeNB according to the existing S1 protocol, because the routing information of the SI signaling is The base station identifier is used, and the DeNB and the RN have the same base station identifier, so that the MME direct information transmission signaling cannot reach the RN. In addition, since the DeNB does not have the information of the RN-managed cell, the DeNB cannot directly return the RN to the BSS or the RNC of the different system. Jurisdiction of the community. Therefore, different systems cannot obtain RN Judging the information of the cell, which will result in load balancing or handover decisions between networks that cannot be effectively implemented. Summary of the invention

In view of this, the main purpose of the present invention is to provide a method for processing direct MME signaling and a DeNB, and the DeNB can successfully return information of a cell under the jurisdiction of the RN to the different system according to the MME direct information transmission signaling, thereby ensuring Effective implementation of load balancing, handover decision, and neighbor parameter configuration between networks.

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

A method for processing direct information transmission signaling of a mobility management entity MME, comprising: receiving, by a host base station, a direct information transmission signaling of a MME, where the direct information transmission signaling of the MME carries a cell identifier and a different system request reported by the different system request report Reported wireless access network

The DeNB determines, according to the received MME direct information transmission signaling, that the cell reported by the different system request includes at least one cell under the RN, and sends a signaling to acquire the radio access network of the cell under the jurisdiction of the at least one RN. The information is sent to the MME to directly transmit the base station direct information transmission signaling of the radio access network information carrying the different system request report.

The signaling that the DeNB acquires the radio access network information from the RN further carries a periodic report indication and/or an event-triggered reporting mechanism, where the periodic report indication gives a periodic report interval, The event-triggered reporting mechanism gives the conditions for triggering the report.

After the DeNB determines that the cell reported by the inter-system request includes at least one cell under the RN according to the received MME direct information transmission signaling, the DeNB further includes:

Determining, by the DeNB, whether the wireless access network information of the cell under the jurisdiction of the at least one RN that is reported by the different system request is stored, and determining that the wireless access of the cell under the jurisdiction of the at least one RN that stores the different system request report is stored. For the network information, the DeNB directly sends the base station direct information transmission signaling that carries the radio access network information reported by the different system request to the MME.

The radio access network information includes one or more of the following: cell load information, part or all Department cell system message, MBMS data channel information.

Between the DeNB and the RN, RRC signaling, S1 signaling, X2 signaling, or DRB communication is used. The signaling sent by the DeNB to the RN to acquire the radio access network information of the cell under the jurisdiction of the RN is

When the MME directly transmits signaling, the method further includes: modifying, by the DeNB, the RIM sequence number included in the direct information transmission signaling of the MME.

When the DeNB receives multiple MME direct information transmission signalings for the same RN or the same RN, the DeNB sends a signal to the RN to obtain the radio access network information.

A DeNB, comprising: a receiving unit, a determining unit, a radio access network information acquiring unit, and a sending unit;

The receiving unit is configured to receive the MME direct information transmission signaling, where the MME direct information transmission signaling carries the cell identifier reported by the different system request report, and the wireless access network information reported by the different system request report;

The determining unit is configured to determine, according to the MME direct information transmission signaling received by the receiving unit, whether the cell reported by the different system request includes at least one cell under the RN, and determine that the cell reported by the different system request includes at least one RN When the cell under the jurisdiction is used, the judgment result is notified to the radio access network information acquiring unit;

The radio access network information acquiring unit is configured to: according to the notification of the determining unit, send signaling to acquire radio access network information of the cell under the jurisdiction of the at least one RN to the corresponding R; the sending unit is set to And transmitting, by the MME, the base station direct information transmission signaling that carries the radio access network information reported by the different system request, according to the radio access network information of the cell managed by the at least one RN acquired by the radio access network information acquiring unit.

The signaling that the DeNB acquires the radio access network information from the RN further carries a periodic report indication and/or an event-triggered reporting mechanism, where the periodic report indication gives a periodic report interval, The event-triggered reporting mechanism gives the conditions for triggering the report. The determining unit is further configured to include at least one cell in the cell that is determined to be reported by the different system request

And determining, by the RN, whether the DeNB stores the radio access network information of the cell of the at least one RN that is reported by the different system request, and determining that the DeNB itself stores the at least one of the different system request report. When the radio access network information of the cell under the jurisdiction of the RN is, the result of the determination is notified to the sending unit;

The sending unit is further configured to directly send, to the MME, the base station direct information transmission signaling that carries the radio access network information reported by the different system request according to the notification of the determining unit.

The radio access network information includes one or more of the following: cell load information, partial or full cell system messages, MBMS data channel information.

Between the DeNB and the RN, RRC signaling, S1 signaling, X2 signaling, or DRB communication is used. The DeNB further includes a modifying unit, configured to modify the RIM sequence number included in the direct information transmission signaling of the MME when the signaling sent by the radio access network information acquiring unit to the RN is MME direct information transmission signaling.

The sending unit is further configured to: when the receiving unit receives multiple MME direct information transmission signalings for the same RN or the same RN-managed cell, send a signaling for acquiring the radio access network information to the RN. .

In the embodiment of the present invention, the method for processing the MME direct information transmission signaling and the DeNB, the DeNB, according to the MME direct information transmission signaling, knows that the cell identifier reported by the different system request is the cell under the jurisdiction of the relay node, and actively acquires the Radio access network information of the relay node. Through the present invention, the different system can successfully obtain the radio access network information of the cell under the jurisdiction of the relay node under the condition that the DeNB and the base station identifier of the relay node under its jurisdiction are consistent, thereby ensuring load balancing and handover decision between the networks and Effective implementation of neighborhood parameter configuration. DRAWINGS

1 is a schematic structural diagram of a system using a wireless relay technology in the prior art;

FIG. 2 is a schematic flowchart of a method for processing direct information transmission signaling of an MME according to an embodiment of the present invention; Figure

3 is a schematic flow chart of a method for processing direct information transmission signaling of an MME according to Embodiment 1 of the present invention;

4 is a schematic flow chart of a method for processing direct information transmission signaling of an MME according to Embodiment 2 of the present invention;

FIG. 5 is a schematic flowchart of a method for processing direct information transmission signaling of an MME according to Embodiment 3 of the present invention; FIG.

FIG. 6 is a schematic flow chart of a method for processing direct information transmission signaling of an MME according to Embodiment 4 of the present invention. Detailed ways

The basic idea of the present invention is: When the DeNB learns that the cell identifier reported by the different system request report is the cell under the jurisdiction of the relay node, the DeNB actively obtains the radio access network information of the relay node from the relay node.

2 is a schematic flowchart of a method for processing direct information transmission signaling of an MME according to an embodiment of the present invention. As shown in FIG. 2, the method includes:

Step 201: The DeNB receives the MME direct information transmission signaling.

The MME direct information transmission signaling generally includes: a cell identifier reported by the different system request, and a radio access network information reported by the heterogeneous system request (RAN Information). The radio access network information generally includes one or more of the following: cell load information, cell system messages (partial or full), MBMS data channel information.

It should be noted that the radio access network information described in the present invention is cell information.

Step 202: The DeNB determines, according to the received MME direct information transmission signaling, that the cell reported by the different system request includes at least one cell under the RN.

Of course, the cell that the system requests to report may also include the cell under the jurisdiction of the DeNB.

Step 203: The DeNB determines whether it stores the at least one of the different system request reports. The radio access network information of the cell under the jurisdiction of the RN, if yes, go to step 205; otherwise, go to step 204.

It should be noted that step 203 is optional. If the DeNB has the capability of storing cell information of the cell under the jurisdiction of the RN, the DeNB needs to ensure that the cell information is up-to-date, which requires an additional mechanism to guarantee. When the DeNB does not store the cell information of the cell under the jurisdiction of the RN or the cell information of the cell to which the RN is located is not the latest information, the DeNB skips step 203 and directly performs step 204.

Step 204: The DeNB acquires radio access network information of the cell under the jurisdiction of the at least one RN from the corresponding RN.

Here, the DeNB sends the signaling for acquiring the radio access network information to the corresponding RN, and carries the cell identifier that needs to be acquired and the radio access network information that needs to be acquired. The RN returns the radio access network information according to the acquisition signaling.

It should be noted that if the RN has only one cell, the signaling of the acquired cell information sent by the DeNB to the corresponding RN only needs to carry the cell information that needs to be acquired.

In the present invention, the DeNB and the RN may use RRC signaling, S1 signaling, or X2 signaling communication, or may perform DRB communication established between the DeNB and the RN.

Step 205: The DeNB sends the base station direct information transmission signaling to the MME, and carries the radio access network information reported by the different system request, where the radio access network information of the cell under the jurisdiction of the at least one RN is included.

It should be noted that the signaling that the DeNB acquires the radio access network information from the RN may further include an indication of a periodic report and/or an event triggering reporting mechanism, where the indication of the periodic report gives a periodic report time. The event triggering reporting mechanism provides a condition for triggering the report. For example, when the radio access network information changes, the RN sends signaling that carries the changed radio access network information to the DeNB.

It should be noted that the DeNB acquires radio access network information of a cell managed by the RN from the RN. When the sent signaling is the MME direct information transmission signaling, the method further includes: the DeNB modifying the RIM serial number included in the direct information transmission signaling of the MME.

It should be noted that, when the DeNB receives multiple MME direct information transmission signalings for the same RN or the same RN, the DeNB sends a signaling for acquiring the wireless access network information to the RN.

The present invention also provides a DeNB, where the DeNB includes: a receiving unit, a determining unit, a radio access network information acquiring unit, and a sending unit;

The radio access network information acquiring unit is configured to: according to the notification of the determining unit, send signaling to acquire, by the corresponding RN, radio access network information of the cell under the jurisdiction of the at least one RN; the sending unit is configured to And transmitting, by the radio access network information acquiring unit, the radio access network information of the cell of the at least one RN, to the MME, the base station direct information transmission signaling that carries the radio access network information reported by the heterogeneous request.

The determining unit is further configured to: when determining that the cell reported by the inter-system request report includes at least one cell of the RN, further determining whether the DeNB stores the radio access of the cell under the jurisdiction of the at least one RN that is reported by the different system request Network information, determining that the DeNB itself has different storage When the system requests the wireless access network information of the cell under the jurisdiction of the at least one RN, the system notifies the sending unit of the determination result;

The implementation of the technical solution will be further described in detail below with reference to specific embodiments. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. Example 1

In this embodiment, the BSS or the RNC sends the RIM Information Request PDU to the Serving BSS through the core network. FIG. 3 is a schematic flowchart of a method for processing direct information transmission signaling of the MME according to Embodiment 1 of the present invention. As shown in FIG. 3, the method includes :

Step 301: After receiving the RIM Information Request PDU sent by the different system, the MME sends, according to the routing information, MME Direct Information Transfer signaling to the DeNB, where the direct information transmission signaling includes RIM Information. Request PDU.

Step 302: After receiving the MME direct information transmission signaling, the DeNB parses the signaling packet. Contains the RIM Information Request PDU. Here, the DeNB obtains a reporting identifier (Reporting Cell Identifier), which is an identifier of a cell (RN_Celll) under the jurisdiction of the RN1. The DeNB also knows that the radio access network information that the different system needs to know is the cell load report, that is, the information about the cell load (Cell Load Reporting) is included in the SON Transfer. Since the DeNB does not have the load information of the RN_Cdll, the DeNB transmits signaling for acquiring the cell load or signaling for requesting the cell load to the RN1. Here, RN1 is a relay node under the jurisdiction of the DeNB.

Step 303: After receiving the signaling of acquiring the cell load or requesting the signaling of the cell bearer sent by the DeNB, the RN1 obtains the load information of the current cell by using the measurement, and returns the signaling carrying the cell load to the DeNB. The method in which the RN1 obtains the load information of the own cell belongs to the prior art, and is not described herein.

Step 304: After receiving the signaling of the cell bearer returned by the RN1, the DeNB generates a RAN INFORMATION PDU, where the RN_Cdll load information is included. The DeNB sends an eNB Direct Information Transfer (MME Direct Information Transfer) to the MME, which includes the RAN INFORMATION PDU.

After receiving the direct information transmission from the base station, the MME sends signaling carrying the load information of the RN_Cdll to the BSS or the RNC through the core network of the different system. At this point, the BSS or RNC of the different system obtains the load information of the RN_Celll, and can be applied to the load balancing or handover decision. If the load of the RN_Celll is light, the BSS or the RNC of the different system can switch the UE in the connected state. Go to RN_Cdll to reduce the load on the system cell.

In this embodiment, the BSS or the RNC of the different system obtains the load information of the relay node d and the area through the RIM process, and if the BSS or the RNC of the different system wants to acquire the system message or the MBMS data channel of the relay node cell (MBMS data channel) For the same information, the process shown in Figure 3 also applies.

The RRC connection, the S1 interface, and the X2 interface exist between the DeNB and the RN it manages. Therefore, the signaling used in step 302 and step 303 of this embodiment may be RRC signaling, S1 signaling, or X2 signaling. In addition, since the DRB is established between the DeNB and the RN for the transmission of the UE data, the step 302 and the step 303 can also be performed by the DRB transmission between the DeNB and the RN, and only the signaling for acquiring the cell load is encapsulated in the data packet. In particular, if the information of the relay node cell load is obtained by using the X2 signaling, the resource status request process provided by the existing protocol may be obtained, and the DeNB sends a resource status request (Resource Status Request) to the RN1, and the RN1 measures the cell load simultaneously. After the DeNB returns the resource status response (Resource Status Response), after obtaining the cell load, the RN1 sends the resource status update (Resource Status Update) signaling to the DeNB to notify the RN_Cdll of the load information.

In particular, if the DeNB obtains the latest RN1 cell load information after receiving the MME direct information transmission signaling, the DeNB may directly return the cell load information of the RN1 to the MME. Example 2

In this embodiment, the neighboring LTE cell of the cell under the control of the BSS or the RNC is a small area under the jurisdiction of the relay node, and the cell is represented by RN_Cdll, and the relay node is represented by RN1. The BSS or the RNC needs to send the RIM Information Request PDU to the Serving BSS through the core network. FIG. 4 is a schematic flowchart of a method for processing direct information transmission signaling of the MME according to Embodiment 2 of the present invention. As shown in FIG. 4, the method includes:

Step 401: The MME receives the RIM Information Request PDU sent by the different system, and sends MME Direct Information Transfer signaling to the DeNB according to the routing information. The RIM Information Request PDU is included in the direct message passing signaling.

Step 402: After receiving the direct information transmission signaling, the DeNB parses the RIM Information Request PDU included in the signaling. The DeNB obtains the Reporting Cell Identifier, which is the identifier of the RN_Celll. The DeNB simultaneously learns that the radio access network information that the different system needs to know is a cell system message. Since the DeNB does not have The system message of RN_Celll, therefore, the DeNB sends signaling for acquiring the cell system message to RN1. In this embodiment, the DeNB finds that the report type set by the different system is a multiple report, so the DeNB includes the indication of the periodic report in the signaling for sending the cell system message to the RN1, for example, setting the periodicity. The time interval of the report.

Step 403: After receiving the signaling of acquiring the cell system message sent by the DeNB, the RN1 returns the signaling carrying the RN_Cdll cell system message to the DeNB, and starts a periodic report timer.

Step 404: After receiving the signaling of the cell system message returned by the RN1, the DeNB generates a RAN INFORMATION PDU, where the system message of the RN_Celll is included. The DeNB sends an eNB Direct Information Transfer (MME) to the MME, which includes the RAN INFORMATION PDU.

When the time interval of the periodic report expires (Expired), the RN1 needs to send the signaling carrying the RN_Cdll cell system message to the DeNB again (possibly the system information of the cell has been updated); the DeNB needs to send the base station direct information transmission to the MME (eNB Direct Information) Transfer ) carries the system information of RN_Celll at this time. The RN1 again sends a timer to the DeNB that needs to restart the periodic report after carrying the signaling of the RN_Cell 1 cell system message.

In this embodiment, in step 402, the DeNB includes an indication of periodic report in transmitting signaling for acquiring the cell system message to the RN1, and the DeNB may also set an event triggering reporting mechanism, for example, when setting the RN_Cdll system message change, the RN1 The DeNB needs to send signaling carrying the changed RN_Celll cell system information. When the RN_Cdll system message is not changed, signaling that carries the RN_Cdll cell system message does not need to be sent, which can reduce the signaling overhead.

In this embodiment, the DeNB may acquire all system messages from the RN1, and may also obtain partial system messages. If the DeNB learns in step 402 that the radio access network information that the different system needs to learn is part of the system message of the cell, the DeNB only needs to acquire part of the system message from the RN1.

After receiving the direct information transmission signaling of the base station, the MME sends signaling of the system message carrying the RN_Celll to the BSS or the RNC through the core network of the different system. BSS or RNC applies it to itself Example 3

In this embodiment, the BSS or the RNC sends the RIM Information Request PDU to the Serving BSS through the core network. FIG. 5 is a schematic flowchart of a method for processing direct information transmission signaling of the MME according to Embodiment 3 of the present invention. As shown in FIG. 5, the method includes :

Step 501: The MME receives the RIM Information Request PDU sent by the different system, and sends MME Direct Information Transfer (MME) signaling to the DeNB according to the routing information. The RIM Information Request PDU is included in the direct message passing signaling.

Step 502: After receiving the MME direct information transmission sent by the MME, the DeNB finds that the BSS or the RNC needs to acquire load information of multiple cells, where the multiple cells include the cell under the jurisdiction of the DeNB (Serving Celll in this embodiment) and the DeNB. The managed cell under the jurisdiction of the relay node (including the cells under the jurisdiction of RN1 and RN2), the DeNB sends signaling for acquiring the cell load to RN1 and RN2, respectively.

Step 503: After receiving the signaling for acquiring the cell load sent by the DeNB, the RN1 and the RN2 obtain the load information of the current cell by using the measurement, and return the signaling carrying the cell load to the DeNB respectively.

The method in which the RN obtains the load information of the own cell belongs to the prior art, and the description is not provided here.

Step 504: After receiving the return signaling of the RN1 and the RN2, the DeNB generates a RAN INFORMATION PDU, where the cell load information of the cell under the jurisdiction of the RN1, the RN2, and the Serving Cell1 is included. The DeNB sends a base station direct information transfer (eNB Direct Information Transfer) to the MME, which includes a RAN INFORMATION PDU. After receiving the direct information transmission from the base station, the MME sends signaling to the BSS or the RNC to carry the load information of the respective cells of the RN1, the RN2, and the Serving Cell1 through the core network of the different system. The BSS or RNC of the different system obtains the load information of the LTE system cell, and can be applied to the load balancing or handover decision. Example 4

In order to achieve load balancing or handover between networks, the BNS of the GERAN system or the RNC of the WCDMA system needs to obtain information such as load information or cell system information of neighboring LTE cells of the BSS or RNC-managed cell through the RIM process. In this embodiment, the neighboring LTE cell in the cell under the jurisdiction of the BSS or RNC is a cell under the jurisdiction of the relay node, and the cell is represented by RN_Cdll, and the relay node is represented by RN1.

The BSS or the RNC sends the RIM Information Request PDU to the Serving BSS through the core network. FIG. 6 is a schematic flowchart of the method for processing the direct information transmission signaling of the MME according to Embodiment 4 of the present invention. As shown in FIG. 6, the method includes:

Step 601: The MME receives the RIM Information Request PDU sent by the different system, and sends MME Direct Information Transfer (MME) signaling to the DeNB according to the routing information. The RIM Information Request PDU is included in the direct message passing signaling.

Step 602: After receiving the direct information transmission signaling, the DeNB parses the RIM Information Request PDU included in the signaling. The DeNB obtains the cell identifier of the heterogeneous system request report.

( Reporting Cell Identifier ), here is the identifier of RN_Celll. The DeNB also knows that the radio access network information that the different system needs to know is the cell load report, that is, the SON Transfer includes the information of the cell load report (Cell Load Reporting). After obtaining the cell identifier of the request, the DeNB re-organizes the RIM Information Request PDU, and sends the signaling carrying the RIM Information Request PDU to the RN1 through the interface between the DeNB and the RN1, and the signaling may be direct information transmission signaling of the MME. At this point, the DeNB embodies the agent of BSSGP in the process.

( roxy ) function. In this step, the DeNB needs to save some or all of the information in the RIM Information Request PDU, so as to be able to check whether the RN1 returns signaling accuracy or not.

Step 603: After receiving the signaling carrying the RIM Information Request PDU, the RN1 parses out the RIM Information Request PDU included in the signaling, and learns that the different system needs to be obtained. Cell load information of RN_Celll. The RN1 calculates the RN_Celll cell load information, and generates a RAN INFORMATION PDU containing the load information of the RN_Cdll. The RN1 sends signaling carrying the RAN INFORMATION PDU to the DeNB, and the signaling may be direct information transmission signaling of the base station.

Step 604: The DeNB receives the signaling carrying the RAN INFORMATION PDU sent by the RN1, and sends the eNB Direct Information Transfer (MME) to the MME, where the RAN INFORMATION PDU is included.

After receiving the direct information transmission from the base station, the MME sends signaling carrying the load information of the RN_Cdll to the BSS or the RNC through the core network of the different system. At this point, the BSS or RNC of the different system obtains the load information of RN_Celll, which can be applied to load balancing or handover decision.

In step 602, the DeNB may further send signaling carrying the RIM Information Request PDU to the RN1 through RRC, S1 or X2. Accordingly, in step 603, the RN1 returns the signaling carrying the RN_Cdll load information to the DeNB as RRC, SI. Or X2 signaling.

If the DeNB receives the direct information transmission signaling in step 602, and after the signaling is resolved, the cell identifier of the known system request report includes multiple cells (such as RN_Cdll and RN_Cdl2), and the DeNB needs to generate and send to different relay nodes. The RIM Information Request PDU, after obtaining the cell load information returned by the different relay nodes (including the load information of the respective cells of the RN_Cdll and the RN_Cdl2), the DeNB generates the aggregated RAN INFORMATION PDU, which includes the load information of each of the RN_Celll and the RN_Cell2. The base station direct information transfer signaling carrying the aggregated RAN INFORMATION PDU is then sent to the MME.

In this embodiment, after the BSS or the RNC of the different system obtains the load information of the RN_Cdll, it may also send an acknowledged data packet (RAN-INFORMATION-ACK PDU) to the RN1, and the data packet is also sent to the MME through the direct information transmission signaling. The DeNB, the DeNB needs to determine, according to the information saved in step 602, that the acknowledged data packet is sent to the RN1, and then sends the MME direct information delivery signaling to the RN1. Or the DeNB receives the RN1 sent in step 604. After the base station directly transmits the signaling, it immediately returns an acknowledgment packet (RAN-INFORMATION-ACK PDU) to the RN1; when the DeNB receives the acknowledgment packet returned by the different system, it directly discards it. Example 5

In this embodiment, the BSS and the RNC respectively send the RIM Information Request PDU to the Serving BSS through the core network. After receiving the MME direct information transmission sent by the MME, the DeNB finds that the BSS and the RNC need to obtain the load information of the cell under the jurisdiction of the RN1. The RN1 is a relay node under the jurisdiction of the DeNB. The DeNB sends a signaling for acquiring the cell load to the RN1. After receiving the return signaling of the RN1, the DeNB generates a RAN INFORMATION PDU (two copies) that needs to return the BSS and the RNC, where the cell load information of the cell under the jurisdiction of the RN1 is included. The DeNB sends two eNB Direct Information Transfers to the MME, where the routing information for one time is for the BSS and the other routing information is for the RNC. After receiving the direct information transmission from the base station, the MME sends signaling carrying the load information of the cell under the jurisdiction of the RN1 to the BSS and the RNC through the core network of the different system according to the routing information. The BSS and RNC of the different system obtain the load information of the LTE system cell, which can be applied to the load balancing or handover decision.

In this embodiment, the RIM sequence number in the RIM Information Request PDU sent by the BSS and the RNC may be the same or different. Since the DeNB sends only one signaling for acquiring the cell load to the RN1, if the DeNB multiplexes the existing MME direct information transmission signaling to obtain the signaling of the cell load, the DeNB may use the RIM sequence number in the RIM Information Request PDU sent by the BSS. The RIM sequence number in the RIM Information Request PDU sent by the RNC may also be used, or the DeNB may set the RIM sequence number in the RIM Information Request PDU sent to the RN1. When the DeNB receives the RAN INFORMATION PDU returned by the RN1 and needs to send the RAN INFORMATION PDU to the RNC and the BSS, the DeNB needs to set the corresponding sequence number according to the RIM sequence number in the request PDU sent by each of the RNC and the BSS. One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

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 processing direct information transfer signaling of a mobility management entity MME, where the method includes:

The host base station DeNB receives the MME direct information transmission signaling, and the MME direct information transmission signaling carries the cell identifier reported by the different system request report, and the wireless access network information reported by the different system request report.

2. The method according to claim 1, wherein the signaling that the DeNB acquires the radio access network information from the RN further carries an indication of a periodic report and/or an event triggering reporting mechanism, wherein the periodic report The indication gives a time interval for periodic reporting, and the event-triggered reporting mechanism gives the conditions for triggering the report.

The method according to claim 1, wherein, after the DeNB determines that the cell reported by the inter-system request includes the cell under the jurisdiction of the RN, the method further includes:

4. The method according to any one of claims 1 to 3, wherein

The method according to any one of claims 1 to 3, wherein the DeNB and the RN RRC signaling, SI signaling, X2 signaling, or DRB communication are used.

The method according to any one of claims 1 to 3, wherein, when the DeNB acquires, from the RN, the signaling sent by the radio access network information of the cell under the jurisdiction of the RN as the direct information transmission signaling of the MME, the method The method further includes: modifying, by the DeNB, the RIM sequence number included in the direct information transmission signaling of the MME.

The method according to any one of claims 1 to 3, wherein, when the DeNB receives multiple MME direct information transmission signalings for the same RN or the same RN-managed cell, the DeNB sends the DeNB to the RN. Send a signaling to obtain information about the radio access network.

A DeNB, where the DeNB includes: a receiving unit, a determining unit, a wireless access network information acquiring unit, and a sending unit;

9. The DeNB according to claim 8, wherein

The signaling that the DeNB acquires the radio access network information from the RN further carries a report of the periodic report and/or an event triggering reporting mechanism, where the indication of the periodic report gives a periodic report. The time interval of the report, the event-triggered reporting mechanism gives the conditions for triggering the report.

10. The DeNB according to claim 8, wherein

The determining unit is further configured to: when determining that the cell reported by the inter-system request report includes at least one cell of the RN, further determining whether the DeNB stores the radio access of the cell under the jurisdiction of the at least one RN that is reported by the different system request The network information, when determining that the DeNB itself stores the radio access network information of the cell of the at least one RN that is reported by the different system request, notifying the sending unit of the determination result;

The DeNB according to any one of claims 8 to 10, wherein

The DeNB according to any one of claims 8 to 10, wherein the DeNB and the RN use RRC signaling, S1 signaling, X2 signaling or DRB communication.

The DeNB according to any one of claims 8 to 10, wherein the DeNB further includes a modifying unit, and the signaling that is set to be sent by the radio access network information acquiring unit to the RN is direct information transmission signaling of the MME. And modifying the RIM sequence number included in the direct message passing signaling of the MME.

The DeNB according to any one of claims 8 to 10, wherein the sending unit is further configured to receive, by the receiving unit, a plurality of MME direct information transmission signals for the same RN or the same RN-managed cell. In order to send a signal to the RN to obtain information about the radio access network.