CN103857036A - Method and device for paging terminal under mobile relay - Google Patents

Abstract

A method for paging a terminal under a mobile relay is provided, which comprises the following steps: the core network node acquires new position information of the RN relay node; and the MME accessed by the UE acquires the position information of the RN from the core network node and determines the paging range for paging the UE, and the MME accessed by the UE initiates paging to the UE in the paging range. The embodiment of the invention also provides network side equipment on the other hand. The scheme provided by the invention can reduce the paging range, avoid the waste of air interface resources, ensure that idle UE under the RN can also be paged quickly and directionally, and ensure that the paged UE can be accessed into services normally. The scheme provided by the invention has the advantages that the change of the existing system is small, the compatibility of the system is not influenced, and the realization is simple and efficient.

Description

Method and device for paging terminal under mobile relay

technical field

The present invention relates to the technical field of mobile communication, in particular, the present invention relates to a method and equipment for paging a terminal under a mobile relay.

Background technique

Figure 1 is a schematic diagram of the existing LTE structure supporting RN (Relay Node, relay or relay node). As shown in Figure 1, in the wireless access network of the LTE system, the radio resource management entity includes eNB macro base station 101 and RN102 , the RN102 accesses the core network through another macro base station DeNB103. Among them, the eNBs 101 are connected through the X2 interface, and each eNB is respectively connected to the MME (Mobility Management Entity, mobile management entity) and S-GW (Serving Gateway, serving gateway) 104 in the core network through the S1 interface; the RN 102 is connected through The Un interface is connected to the DeNB 103. DeNB 103 provides an X2 proxy (proxy) function between RN 102 and other eNBs. DeNB 103 provides the S1 proxy function between RN 102 and MME/S-GW 104. The proxy function of S1 and X2 includes the transmission of UE-specific X2 and S1 signaling between RN 102 and eNB 101, RN 102 and MME 104, and the transmission function between RN 102 and S-GW 104.

The existing S1 interface control plane protocol stack supporting relay is shown in FIG. 2 . There is an S1 interface between the RN and its DeNB, and an S1 interface between the DeNB and each MME in the MME pool. DeNB processes and forwards all UE-specific S1 signaling between RN and MME. DeNB's processing of the UE-specific S1 message includes modifying the S1 application protocol UE identification S1-APUE IDs, transport layer address and GTP TEIDs and keeping other parts of the message unchanged.

Existing relays are for fixed locations and do not support mobility between different cells. The problem that operators are facing now is that on high-speed moving trains, such as trains moving 250-350 kilometers, the service quality provided by existing relays cannot meet the needs of operators, such as high noise and high penetration loss , severe Doppler frequency shift, low handover success rate, etc. So the operator puts forward the research topic of mobile relay. The mobile relay is to solve the above-mentioned problems existing in the existing relay, improve the quality of service that can be provided on the high-speed train, and better meet the needs of users.

In the process of moving, the relay is handed over from one DeNB to another DeNB. The problems in the existing technology are:

The location area where the RN serves the UE under the RN is TA'. When the RN moves between DeNBs with the train, the UE it accesses moves with the RN. Since TA' will not change, this greatly saves the process of UE TAU, but UE will not initiate TAU to the MME (referred to as MME-UE) accessed by UE to update the location of UE when moving with RN, so The MME-UE does not know the exact location of the UE. In the RN system architecture, as shown in Figure 2, all the control and bearing of the RN are terminated at the IP layer of the DeNB protocol stack, that is, the MME-UE accessed by the idle UE cannot directly find the RN according to the address of the RN, and cannot determine The DeNB accessed by the RN. When an idle UE needs to be paged, since the MME-UE neither knows the current exact location of the UE nor the location of the RN that the UE accesses, it can only send a paging request to all DeNBs that the RN can pass along the route. Some railway lines span multiple cities and provinces, and there are a lot of DeNBs on the backhaul network along the line. All of them are paging, which is a great waste of paging resources, because the RN connected to the UE can only be connected to one DeNB at the same time, and all sending The paging to the UE triggered by other DeNBs is a waste of resources.

Therefore, it is necessary to propose an effective technical solution to solve the above technical problems.

Contents of the invention

The purpose of the present invention is to at least solve one of the above-mentioned technical defects, especially by acquiring the location information of the RN accessed by the terminal, when the MME initiates paging, the location of the terminal can be effectively located.

On the one hand, an embodiment of the present invention proposes a method for paging a terminal under a mobile relay, including the following steps:

The core network node acquires new location information of the RN relay node;

The MME accessed by the UE obtains the location information of the RN from the core network node, and determines a paging range for paging the UE, and the MME accessed by the UE initiates paging for the UE within the paging range.

On the other hand, the embodiment of the present invention also proposes a network side device, including a receiving module, a computing module and a sending module,

The receiving module is configured to obtain new location information of the RN relay node;

The computing module is configured to determine the paging range for paging the UE according to the acquired location information of the RN;

The sending module is used for the MME accessed by the UE to initiate paging for the UE within the paging range.

The above solution proposed by the present invention can reduce the scope of paging, avoid waste of air interface resources, and ensure that idle UEs under the RN can also quickly perform directional paging, and at the same time ensure that the UEs after paging can normally access services. The above-mentioned solution proposed by the present invention requires little modification to the existing system, does not affect the compatibility of the system, and is simple and efficient to implement.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic diagram of an existing LTE structure supporting a relay (RN);

Fig. 2 is the existing S1 interface control plane protocol stack supporting RN;

FIG. 3 is a flowchart of a method for paging a terminal under a mobile relay according to an embodiment of the present invention;

Fig. 4 is a working flow chart of the present invention to optimize the application scenario 1 of paging UE under mobile relay;

FIG. 5 is a work flow diagram of the second application scenario of optimizing paging UE under mobile relay in the present invention;

FIG. 6 is a work flow diagram of the third application scenario of optimizing paging UE under mobile relay in the present invention;

FIG. 7A is a working flowchart of Example 1 of the application scenario 1 of optimizing paging UE under mobile relay in the present invention;

FIG. 7B is a working flowchart of Example 2 of the application scenario 1 of optimizing the paging UE under the mobile relay in the present invention;

FIG. 7C is a working flowchart of Example 3 of the application scenario 1 of optimizing the paging UE under the mobile relay in the present invention;

FIG. 7D is a working flowchart of Example 4 of the application scenario 1 of optimizing paging UE under mobile relay in the present invention;

FIG. 8A is a working flowchart of Example 1 of the application scenario 2 of optimizing paging UE under mobile relay in the present invention;

FIG. 8B is a working flowchart of Example 2 of the application scenario 2 of optimizing paging UE under mobile relay in the present invention;

FIG. 8C is a working flowchart of Example 3 of the application scenario 2 of optimizing the paging UE under the mobile relay in the present invention;

FIG. 8D is a working flowchart of Example 4 of the application scenario 2 of optimizing paging UE under mobile relay in the present invention;

FIG. 9 is a working flowchart of Example 1 of the third application scenario of optimizing paging UE under mobile relay in the present invention;

FIG. 10 is a schematic structural diagram of a network side device according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and/or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Additionally, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein explain.

Those skilled in the art can understand that the "terminal" and "terminal equipment" used here include both equipment with wireless signal receivers without transmission capabilities, and receivers capable of bidirectional communication on bidirectional communication links. and launch hardware devices. Such equipment may include: cellular or other communication equipment with or without a multi-line display; personal communication systems (PCS) that may combine voice and data processing, facsimile and/or data communication capabilities; may include radio frequency receivers and pagers, Internet / Personal Digital Assistant (PDA) with intranet access, web browser, notepad, calendar and/or Global Positioning System (GPS) receiver; and/or conventional laptop and/or palmtop computer including radio frequency receiver or other devices. As used herein, a "terminal" or "terminal device" may be portable, transportable, installed in a vehicle (air, sea, and/or land), or adapted and/or configured to operate locally and/or with Distributed forms operate anywhere on Earth and/or in space. The "terminal" and "terminal device" used here can also be a communication terminal, an Internet terminal, a music/video player terminal, for example, it can be a PDA, MID and/or a mobile phone with a music/video player function, and it can be a smart TV , set-top boxes and other equipment. "Base station" and "base station equipment" are network side equipment corresponding to "terminal" and "terminal equipment".

In order to achieve the purpose of the present invention, an embodiment of the present invention proposes a method for paging a terminal under mobile relay, including the following steps:

The core network node acquires new location information of the RN relay node;

The MME accessed by the UE obtains the location information of the RN from the core network node, and determines a paging range for paging the UE, and the MME accessed by the UE initiates paging for the UE within the paging range.

As shown in FIG. 3, it is a flowchart of a method for paging a terminal under a mobile relay according to an embodiment of the present invention, including steps S310 to S320:

Step S310: the core network node acquires new location information of the RN relay node.

In step S310, the core network node is some kind of network equipment. As an embodiment of the present invention, the core network node includes but not limited to HSS, centralized MME or MME accessible to UE under RN. Wherein, the MME that the UE under the RN can access is the MME that supports the TA' location area serving the UE under the RN, and the TA' location area is the location area serving the UE under the RN.

Specifically, the acquisition of the new location information of the RN by the core network node includes any of the following methods:

When the location of the RN changes, the core network node receives the new location information of the RN from the target DeNB or the target MME; and

The core network node requests the current location information of the RN from all DeNBs associated with the RN. Specifically, all associated DeNBs are, for example, all DeNBs that can pass along public transportation such as railways and subways. Apparently, all associated DeNBs may be configured or determined by the system according to actual conditions.

Specifically, the new location information of RN includes:

The DeNB, TAI or MME newly accessed by the RN.

Step S320: The MME accessed by the UE determines the paging range for paging the UE according to the location information of the RN, and initiates paging to the UE.

Specifically, in step S320, the MME accessed by the UE obtains the location information of the RN from the core network node, determines the paging range for paging the UE, and the MME accessed by the UE initiates paging for the UE within the paging range.

Specifically, the MME accessed by the UE initiates paging for the UE within the paging range, including any of the following methods:

The MME accessed by the UE sends a paging request for paging the UE to the DeNB within the paging range; and

The MME accessed by the UE is mapped to the MME accessed by the RN according to the new location information of the RN, and sends the paging request to the MME accessed by the RN, and the MME accessed by the RN forwards the paging request of the UE to the DeNB accessed by the RN .

Specifically, when the core network node is an MME that the UE under the RN can access, the MME that the UE under the RN can access is an MME that supports the TA' location area serving the UE under the RN, and the target DeNB or the target MME according to The TA' location area learns the MMEs that the UE can access, wherein the TA' location area is a location area under the RN that serves the UE.

In addition, the MME accessed by the UE obtains the location information of the RN from the core network node, including but not limited to the following methods:

The MME accessed by the UE acquires the location information of the RN through the identity of the RN accessed by the UE or the TA' location area index, wherein the TA' location area is the location area under the RN serving the UE.

Furthermore, when describing from the perspective of the interaction of each network element in the network, when the core network node itself is the MME accessed by the UE, the above steps S310 to S320 can be embodied by the workflow in Figure 4 or Figure 6; the core network node is not When the UE under the RN can access the MME, the above steps S310 to S320 can be embodied by the workflow in FIG. 5 . These different workflows are just different application scenarios, which are essentially consistent with the gist of the present invention. Examples in various application scenarios are further described below. In the following application scenarios, all associated DeNBs are taken as examples of all DeNBs that can pass along public transportation such as railways and subways. Apparently, all associated DeNBs may be configured or determined by the system according to actual conditions.

Figure 4 shows a workflow of the present invention for optimizing the application scenario 1 of paging a UE under a mobile relay.

Step 401 , when the location of the RN changes, the target DeNB or the target MME-RN updates the new location information of the RN to the MME-UE.

The TA broadcast by the RN to the serving UE is TA', and TA' will not change when the RN moves. When the RN switches between DeNBs or updates its location, the target DeNB or the target MME-RN sends new location information to all MMEs supporting TA', and the new location information may be the DeNB, TAI or MME newly accessed by the RN.

Step 402, the MME-UE determines the paging range of the UE according to the obtained RN location and initiates paging.

After the MME-UE obtains the location information of the RN, it narrows down the paging range of the UE and sends the paging request of the UE to the DeNB within the range; or after the MME-UE is mapped to the MME-RN according to the location information currently accessed by the RN, The paging request is sent to the MME-RN, and the MME-RN forwards the paging request of the UE to the DeNB accessed by the RN.

The workflow of the application scenario 2 of optimizing paging UE under the mobile relay of the present invention is shown in FIG. 5 .

Step 501, when the location of the RN changes, the target DeNB or the target MME-RN updates the new location information of the RN to the core network node.

When the RN is switched or the location is updated, the target DeNB or the target MME-RN updates the new location information to the core network node. The new location information may be the newly accessed DeNB, TAI or MME of the RN; the core network node may be the HSS or MME.

Step 502, the MME-UE obtains the current access location of the RN through the core network node.

For idle UEs served by RN, when MME-UE (referred to as MME for UE access) receives a downlink data notification and needs to initiate paging to idle UEs, it first obtains the RN's current access information from the core network node through TA' or RN identification. location information. When obtaining the location information of the RN from the core network node through the RN identifier, the RN is required to send the RN identifier to the MME-UE when the UE attaches or is in TAU. The address of the centralized MME may be pre-configured.

In step 503, the MME-UE determines the paging range of the UE according to the obtained RN location and initiates paging.

Same as step 402.

The workflow of the third application scenario of optimizing the paging of the UE under the mobile relay of the present invention is shown in FIG. 6 .

Step 601 , the MME-UE requests the current location of the RN from all DeNBs that the RN can pass along the route.

The MME-UE initiates an RN location request to all DeNBs that the RN can pass along the line, and only the DeNB that the RN accesses returns a response after receiving the request.

In step 602, the MME-UE determines a destination location for paging the UE according to the obtained RN location.

The MME-UE sends UE paging to the DeNB accessed by the RN according to the response.

The following is a further description of the application scenarios of the present invention, and the irrelevant content that has been defined in the standard will not be repeated.

Application Scenario 1 Example 1

Based on the above method, FIG. 7A shows a work flow chart of an example 1 of an application scenario of optimizing paging a UE under a mobile relay. This embodiment uses the TAU process as an example. The following is a detailed description of Fig. 7A. A detailed description of steps not related to the present invention is omitted here.

In step 7A01, the RN initiates a TAU request to the target DeNB.

Step 7A02, the target DeNB forwards the TAU request to the target MME-RN.

In step 7A03, the target MME-RN sends a TAU acceptance to the RN.

In step 7A04, the RN sends the TAU completion to the target MME-RN. If it is found that the location of the RN has changed, the target DeNB or the target MME-RN can notify all MME-UEs that support TA': the target DeNB can notify the MME-UE in two ways, respectively step 7A05 and step 7A06; the target MME-RN The MME-UE can be notified in two ways, namely step 7A08 and step 7A09.

Step 7A05, the target DeNB sends an update location notification to all MME-UEs that support TA', and updates the current location of the RN, which is recorded as update RN location selection 1, which can be the currently accessed TAI or DeNB or MME.

In step 7A06, the target DeNB sends an eNB configuration update to all MME-UEs supporting TA', which is recorded as the update RN location option 2, indicating the newly added supported location area TA' in the DeNB.

In step 7A07, the MME-UE updates the current location of the RN after receiving the eNB configuration update and returns an eNB configuration update confirmation to the target DeNB.

Step 7A08, the target MME-RN sends an update location notification to all MME-UEs supporting TA', updating the current location of the RN, which is recorded as updating RN location option 3, which can be the currently accessed TAI or DeNB or MME.

Step 7A09, the target MME-RN sends an update location request to all MME-UEs that support TA', and updates the current location of the RN, which is recorded as update RN location option 4, which can be the currently accessed TAI or DeNB or MME.

In step 7A10, the MME-UE sends a location update reply to the target MME-RN.

Step 7A11, the MME-UE receives the downlink data notification for the idle UE sent by the SGW-UE (the abbreviation of the SGW accessed by the UE), and needs to initiate paging to the UE under the RN, and the paging message can be sent in two ways For the RN, the RN performs paging for the idle UE under it, which are steps 7A12 and 7A13 respectively.

In step 7A12, the MME-UE sends a paging message to the DeNB within the location of the RN, which is recorded as sending UE paging option 1.

In step 7A13, the MME-UE sends a paging message to the MME-RN where the RN is located.

In step 7A14, the MME-RN sends the paging message to the DeNB within the location of the RN, which is recorded as sending UE paging option 2.

In step 7A15, the DeNB forwards the paging message to the RN after receiving it.

Application Scenario 1 Example 2

Based on the above method, FIG. 7B shows a working flowchart of Example 2 of the first example of the application scenario of optimizing the paging UE under the mobile relay. This embodiment takes the intra-MME handover process of the X2 interface as an example. The following is a detailed description of Fig. 7B. A detailed description of steps not related to the present invention is omitted here.

Step 7B01, the source DeNB sends a handover request to the target DeNB.

In step 7B02, the target DeNB sends a handover request confirmation to the source DeNB.

Step 7B03, the source DeNB sends RRC connection reconfiguration to the RN.

In step 7B04, the RN sends an RRC connection reconfiguration completion to the target DeNB.

Step 7B05, the target DeNB sends a path switching request to the target MME-RN.

In step 7B06, the target MME-RN sends a path switch request confirmation to the target DeNB. If it is found that the location of the RN has changed, the target DeNB or the target MME-RN can notify all MME-UEs that support TA': the target DeNB can notify the MME-UE in two ways, which are steps 7B07 and 7B08 respectively; the target MME-RN The MME-UE can be notified in two ways, namely step 7B10 and step 7B11.

Step 7B07 to step 7B17 are the same as step 7A05 to step 7A15 and will not be repeated here.

Application Scenario 1 Example 3

Based on the above method, FIG. 7C shows a working flowchart of an example 3 of an application scenario 1 and an example 3 of optimizing the paging UE under the mobile relay. This embodiment takes the intra-MME handover process of the S1 interface as an example. The following is a detailed description of Fig. 7C. A detailed description of steps not related to the present invention is omitted here.

In step 7C01, the source DeNB sends a handover request to the target MME-RN.

In step 7C02, the target MME-RN sends a handover request to the target DeNB.

In step 7C03, the target DeNB sends a handover request confirmation to the target MME-RN.

In step 7C04, the target MME-RN sends a handover command to the source DeNB.

In step 7C05, the source DeNB sends a handover command to the RN.

In step 7C06, the RN sends an RRC connection reconfiguration completion to the target DeNB.

In step 7C07, the target DeNB sends a handover notification to the target MME-RN. If it is found that the location of the RN has changed, the target DeNB or the target MME-RN can notify all MME-UEs that support TA': the target DeNB can notify the MME-UE in two ways, which are steps 7C08 and 7C09 respectively; the target MME-RN The MME-UE can be notified in two ways, namely step 7C11 and step 7C12.

Step 7C08 to step 7C18 are the same as step 7A05 to step 7A15 and will not be repeated here.

Application Scenario 1 Example 4

Based on the above method, FIG. 7D shows a working flowchart of an example 4 of an application scenario 1 of optimizing paging a UE under a mobile relay. This embodiment takes an inter-MME handover process as an example. The following is a detailed description of Fig. 7D. A detailed description of steps not related to the present invention is omitted here.

In step 7D01, the source DeNB sends a handover request to the source MME-RN.

Step 7D02, the source MME-RN sends a forwarding relocation request to the target MME-RN.

Step 7D03, the target MME-RN sends a handover request to the target DeNB.

In step 7D04, the target DeNB sends a handover request confirmation to the target MME-RN.

Step 7D05, the target MME-RN sends a forwarding relocation response to the source MME-RN.

Step 7D06, the target MME-RN sends a handover command to the source DeNB.

Step 7D07, the source DeNB sends a handover command to the RN.

In step 7D08, the RN sends an RRC connection reconfiguration completion to the target DeNB.

Step 7D09, the target DeNB sends a handover notification to the target MME-RN. If it is found that the location of the RN has changed, the target DeNB or the target MME-RN can notify all MME-UEs that support TA': the target DeNB can notify the MME-UE in two ways, respectively step 7D10 and step 7D11; the target MME-RN The MME-UE can be notified in two ways, namely step 7D13 and step 7D14.

Step 7D10 to step 7D20 are the same as step 7A05 to step 7A15 and will not be repeated here.

Example 1 of Application Scenario 2

Based on the above-mentioned method, FIG. 8A shows a working flow chart of example 1 of application scenario 2 of optimized paging UE under mobile relay. This embodiment uses the TAU process as an example. The following is a detailed description of FIG. 8A. A detailed description of steps not related to the present invention is omitted here.

Step 8A01, the UE attaches or TAUs to the MME-UE under the RN, the RN can include the RN identity in the initial UE message carrying the UE attachment or TAU or the uplink direct transmission message, and the MME-UE can know the current access of the UE in two ways Under which RN, the RN is mapped directly through the RN identity or through the TA' attached to the UE.

In step 8A02, the RN initiates a TAU request to the target DeNB.

Step 8A03, the target DeNB forwards the TAU request to the target MME-RN.

Step 8A04, the target MME-RN sends a TAU acceptance to the RN.

In step 8A05, the RN sends the TAU completion to the target MME-RN. If it is found that the location of the RN has changed, the target DeNB or the target MME-RN can notify the centralized MME node (for uniformly recording the location of the RN) or the target MME-RN can notify the HSS: the target DeNB can notify the centralized MME in two ways, respectively There are steps 8A06 and 8A07; the target MME-RN can notify the centralized MME in two ways, namely step 8A09 and step 8A10; the target MME-RN can notify the HSS through step 8A10.

In step 8A06, the target DeNB sends an update location notification to the supported MME to update the current location of the RN, which is recorded as update RN location option 1, which can be the currently accessed TAI or DeNB or MME.

In step 8A07, the target DeNB sends an eNB configuration update to the centralized MME, which is recorded as update RN location option 2, indicating the newly added supported location area TA' in the DeNB.

In step 8A08, the centralized MME updates the current location of the RN after receiving the eNB configuration update and returns an eNB configuration update confirmation to the target DeNB.

In step 8A09, the target MME-RN sends an update location notification to the centralized MME to update the current location of the RN, which is recorded as update RN location option 3, which may be the currently accessed TAI or DeNB or MME.

Step 8A10, the target MME-RN sends an update location request to the centralized MME or HSS to update the current location of the RN, recorded as update RN location option 4, which can be the currently accessed TAI or DeNB or MME.

Step 8A11, the centralized MME or HSS sends a location update reply to the target MME-RN.

In step 8A12, the MME-UE receives a downlink data notification for an idle UE sent by the SGW-UE (short for the SGW accessed by the UE), and needs to initiate paging to the UE under the RN.

Step 8A12, the MME-UE sends a location query request to the centralized MME or HSS according to the RN identity or TA' to obtain the current location of the RN, which may be the currently accessed TAI or DeNB or MME. According to the current location of the RN, the MME-UE can send a paging message to the RN in two ways, and the RN will page the idle UE under it, which are step 8A15 and step 8A16 respectively.

In step 8A15, the MME-UE sends the paging message to the DeNB within the location of the RN, which is recorded as sending UE paging option 1.

In step 8A16, the MME-UE sends a paging message to the MME-RN where the RN is located, which is recorded as sending UE paging option 2.

In step 8A17, the MME-RN sends a paging message to the DeNB within the location of the RN.

In step 8A18, the DeNB forwards the paging message to the RN after receiving it.

Application Scenario 2 Example 2

Based on the above method, FIG. 8B shows a working flowchart of Example 2 of application scenario 2 of optimizing paging UE under mobile relay. This embodiment takes the intra-MME handover process of the X2 interface as an example. The following is a detailed description of Fig. 8B. The following is a detailed description of Fig. 8B. A detailed description of steps not related to the present invention is omitted here.

Step 8B01, the UE attaches or TAUs to the MME-UE under the RN, the RN can include the RN identity in the initial UE message or the uplink direct transmission message carrying the UE attachment or TAU, and the MME-UE can know the current access of the UE in two ways Under which RN, the RN is mapped directly through the RN identity or through the TA' attached to the UE.

Step 8B02, the source DeNB sends a handover request to the target DeNB.

In step 8B03, the target DeNB sends a handover request confirmation to the source DeNB.

Step 8B04, the source DeNB sends RRC connection reconfiguration to the RN.

In step 8B05, the RN sends an RRC connection reconfiguration completion to the target DeNB.

Step 8B06, the target DeNB sends a path switching request to the target MME-RN.

In step 8B07, the target MME-RN sends a path switching request confirmation to the target DeNB. If it is found that the location of the RN has changed, the target DeNB or the target MME-RN can notify the centralized MME node (for uniformly recording the location of the RN) or the target MME-RN can notify the HSS: the target DeNB can notify the centralized MME in two ways, respectively It is step 8B08 and step 8B09; the target MME-RN can notify the centralized MME in two ways, namely step 8B11 and step 8B12; the target MME-RN can notify the HSS through step 8B12.

Step 8B08 to step 8B20 are the same as step 8A06 to step 8A18 and will not be repeated here.

Application Scenario 2 Example 3

Based on the above method, FIG. 8C shows a working flowchart of example 3 of application scenario 2 and example 3 of optimized paging UE under mobile relay. This embodiment takes the intra-MME handover process of the S1 interface as an example. The following is a detailed description of Fig. 8C. A detailed description of steps not related to the present invention is omitted here.

Step 8C01, the UE attaches or TAUs to the MME-UE under the RN, the RN can include the RN identity in the initial UE message or the uplink direct transmission message carrying the UE attachment or TAU, and the MME-UE can know the current access of the UE in two ways Under which RN, the RN is mapped directly through the RN identity or through the TA' attached to the UE.

Step 8C02, the source DeNB sends a handover request to the target MME-RN.

Step 8C03, the target MME-RN sends a handover request to the target DeNB.

In step 8C04, the target DeNB sends a handover request confirmation to the target MME-RN.

In step 8C05, the target MME-RN sends a handover command to the source DeNB.

In step 8C06, the source DeNB sends a handover command to the RN.

In step 8C07, the RN sends an RRC connection reconfiguration completion to the target DeNB.

In step 8C08, the target DeNB sends a handover notification to the target MME-RN. If it is found that the location of the RN has changed, the target DeNB or the target MME-RN can notify the centralized MME node (for uniformly recording the location of the RN) or the target MME-RN can notify the HSS: the target DeNB can notify the centralized MME in two ways, respectively These are step 8C08 and step 8C09; the target MME-RN can notify the centralized MME in two ways, namely step 8C11 and step 8C12; the target MME-RN can notify the HSS through step 8C12.

Step 8C08 to step 8C20 are the same as step 8A06 to step 8A18 and will not be repeated here.

Application Scenario 2 Example 4

Based on the above method, FIG. 8D shows a working flowchart of example 4 of application scenario 2 of optimizing paging UE under mobile relay. This embodiment takes an inter-MME handover process as an example. The following is a detailed description of Fig. 8D. A detailed description of steps not related to the present invention is omitted here.

Step 8D01, the UE attaches or TAUs to the MME-UE under the RN, the RN can include the RN identity in the initial UE message or the uplink direct transmission message carrying the UE attachment or TAU, and the MME-UE can know the current access of the UE in two ways Under which RN, the RN is mapped directly through the RN identity or through the TA' attached to the UE.

Step 8D02, the source DeNB sends a handover request to the source MME-RN.

Step 8D03, the source MME-RN sends a forwarding relocation request to the target MME-RN.

Step 8D04, the target MME-RN sends a handover request to the target DeNB.

In step 8D05, the target DeNB sends a handover request confirmation to the target MME-RN.

Step 8D06, the target MME-RN sends a forwarding relocation response to the source MME-RN.

In step 8D07, the target MME-RN sends a handover command to the source DeNB.

Step 8D08, the source DeNB sends a handover command to the RN.

In step 8D09, the RN sends an RRC connection reconfiguration completion to the target DeNB.

In step 8D10, the target DeNB sends a handover notification to the target MME-RN. If it is found that the location of the RN has changed, the target DeNB or the target MME-RN can notify the centralized MME node (for uniformly recording the location of the RN) or the target MME-RN can notify the HSS: the target DeNB can notify the centralized MME in two ways, respectively These are step 8D11 and step 8D12; the target MME-RN can notify the centralized MME in two ways, namely step 8D14 and step 8D15; the target MME-RN can notify the HSS through step 8D15.

Step 8D11 to step 8D23 are the same as step 8A06 to step 8A18 and will not be repeated here.

Example 1 of Application Scenario 3

Based on the above method, FIG. 9 shows a workflow flowchart of Example 1 of the third example of the application scenario of optimizing the paging of the UE under the mobile relay. This embodiment takes an inter-MME handover process as an example. The following is a detailed description of FIG. 9 . A detailed description of steps not related to the present invention is omitted here.

Step 901, UE initiates an attach or TAU request to RN.

Step 902, the RN forwards the attach or TAU request to the target MME-UE. The RN can include the RN ID in the initial UE message or uplink direct transmission message that bears the UE attachment or TAU, and the MME-UE can know which RN the UE is currently connected to in two ways, directly through the RN ID or through the TA attached to the UE 'Map RN.

Step 903, the target MME-UE sends a TAU acceptance to the UE.

Step 904, the UE sends TAU completion to the target MME-UE.

Step 905, the MME-UE receives a downlink data notification for an idle UE sent by the SGW-UE (short for the SGW accessed by the UE), and needs to initiate paging to the UE under the RN. The MME-UE can acquire the location of the RN in three ways, which are 906, 908 or 910 respectively. The location information may be DeNB or TAI.

Step 906, the MME-UE initiates RN paging to all DeNBs that the RN can pass along the route according to the RN identity or TA'.

Step 907, the DeNB accessed by the RN returns a paging response to the MME-UE, indicating the location information of the RN, which may be the DeNB or the TAI.

Step 908, the MME-UE sends location control to all DeNBs that the RN can pass along the route according to the RN identity or TA'.

Step 909, the DeNB accessed by the RN returns a location report to the MME-UE, indicating the location information of the RN, which may be a DeNB or a TAI.

Step 910, the MME-UE sends a location query request to all DeNBs that the RN can pass along the route according to the RN identity or TA'.

In step 911, the DeNB accessed by the RN returns a location query response to the MME-UE, indicating the location information of the RN, which may be a DeNB or a TAI.

Step 912, the MME-UE sends a paging message to the DeNB within the location of the RN.

In step 913, the DeNB forwards the paging message to the RN after receiving it.

Corresponding to the above method, the embodiment of the present invention also proposes a network side device 100 , including a receiving module 110 , a computing module 120 and a sending module 130 .

Wherein, the receiving module 110 is used to acquire new location information of the RN relay node;

The computing module 120 is used to determine the paging range for paging the UE according to the acquired location information of the RN;

The sending module 130 is used for the MME accessed by the UE to initiate paging for the UE within the paging range.

As an embodiment of the above-mentioned network side device 100, the receiving module 110 is used to obtain the new location information of the RN, including any of the following methods:

When the location of the RN changes, the receiving module 110 receives the new location information of the RN from the target DeNB or the target MME; and

The sending module 130 is configured to request the current location information of the RN from all DeNBs associated with the RN, and then the receiving module 110 acquires new location information of the RN. As an embodiment of the above-mentioned network side device 100, the new location information of the RN includes:

The DeNB, TAI or MME newly accessed by the RN.

As an embodiment of the above-mentioned network side device 100, the sending module 130 is used to initiate paging to the UE within the paging range, including any of the following methods:

The sending module 130 is configured to send a paging request for paging the UE to the DeNB within the paging range; and

The sending module 130 is used to map to the MME accessed by the RN according to the new location information of the RN, and send the paging request to the MME accessed by the RN, and the MME accessed by the RN forwards the paging request of the UE to the DeNB accessed by the RN .

As an embodiment of the above-mentioned network side device 100, obviously, in a specific network implementation, the network side device 100 includes but not limited to the following devices: HSS home user server, centralized MME or MME accessible to UE under RN. Wherein, the MME that the UE under the RN can access is the MME that supports the TA' location area serving the UE under the RN, and the TA' location area is the location area serving the UE under the RN.

As an embodiment of the above-mentioned network side device 100, when the network side device 100 is an MME that the UE under the RN can access, the MME that the UE under the RN can access is an MME that supports the TA' location area serving the UE under the RN, receiving The module 110 receiving the new location information of the RN from the target DeNB or the target MME further includes: the target DeNB or the target MME learns the MME that the UE can access according to the TA' location area.

The above method or device proposed by the present invention can effectively reduce the scope of paging, avoid waste of air interface resources, and ensure that idle UEs under the RN can also quickly perform directional paging, and at the same time ensure that the UEs after paging can normally access services. In addition, the above-mentioned method or device proposed by the present invention has little modification to the existing system, does not affect the compatibility of the system, and is simple and efficient to implement.

Those skilled in the art will appreciate that the present invention may relate to an apparatus for performing one or more of the operations described in this application. Said apparatus may be specially designed and fabricated for the required purposes, or it may comprise known apparatus in a general purpose computer selectively activated or reconfigured by a program stored in it. Such a computer program can be stored in a device (e.g., computer) readable medium, including but not limited to any type of medium suitable for storing electronic instructions and respectively coupled to a bus. Types of disks (including floppy disks, hard disks, compact disks, CD-ROMs, and magneto-optical disks), random access memory (RAM), read-only memory (ROM), electrically programmable ROM, electrically erasable ROM (EPROM), electrically erasable Programmable ROM (EEPROM), flash memory, magnetic card or optical card. Readable media include any mechanism for storing or transmitting information in a form readable by a device (eg, a computer). Readable media include, for example, random access memory (RAM), read only memory (ROM), magnetic disk storage media, optical storage media, flash memory devices, signals transmitted in electrical, optical, acoustic or other forms (such as carrier waves, Infrared signal, digital signal), etc.

Those skilled in the art will understand that computer program instructions can be used to implement each block in these structural diagrams and/or block diagrams and/or flow diagrams and combinations of blocks in these structural diagrams and/or block diagrams and/or flow diagrams . These computer program instructions may be provided to a general-purpose computer, specialized computer, or other programmable data-processing processor to create a machine, whereby the instructions executed by the computer or other programmable data-processing processor create a structure for implementing A method specified in a box or boxes of a diagram and/or block diagram and/or flow diagram.

Those skilled in the art can understand that the various operations, methods, and steps, measures, and solutions in the processes discussed in the present invention can be replaced, changed, combined, or deleted. Further, other steps, measures, and schemes in the various operations, methods, and processes that have been discussed in the present invention may also be replaced, changed, rearranged, decomposed, combined, or deleted. Further, steps, measures, and schemes in the prior art that have operations, methods, and processes disclosed in the present invention can also be alternated, changed, rearranged, decomposed, combined, or deleted.

The above descriptions are only part of the embodiments of the present invention. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principles of the present invention. It should be regarded as the protection scope of the present invention.

Claims (13)

1. A method for paging a mobile relay terminal, comprising the following steps: The core network node acquires new location information of the RN relay node; The MME accessed by the UE obtains the location information of the RN from the core network node, and determines a paging range for paging the UE, and the MME accessed by the UE initiates paging for the UE within the paging range. 2. The method according to claim 1, wherein the core network node comprises: The HSS home user server, the centralized MME, or the MME that the UE under the RN can access, Wherein, the MME that the UE under the RN can access is an MME that supports the TA' location area serving the UE under the RN, and the TA' location area is the location area serving the UE under the RN . 3. The method according to claim 2, wherein the acquisition of the new location information of the RN by the core network node comprises any of the following methods: When the location of the RN changes, the core network node receives new location information of the RN from a target DeNB or a target MME; and The core network node requests the current location information of the RN from all DeNBs associated with the RN. 4. The method according to claim 3, wherein the new location information of the RN comprises: The DeNB, TAI or MME newly accessed by the RN. 5. The method according to claim 3, wherein the core network node receives the new location information of the RN from the target DeNB or the target MME, further comprising: The target DeNB or target MME learns the MMEs that the UE can access according to the TA' location area. 6. The method according to claim 1, wherein the MME accessed by the UE initiates paging to the UE within the paging range, comprising any of the following methods: The MME accessed by the UE sends a paging request for paging the UE to the DeNB within the paging range; and The MME accessed by the UE maps to the MME accessed by the RN according to the new location information of the RN, sends a paging request to the MME accessed by the RN, and the MME accessed by the RN sends a paging request to the MME accessed by the RN The DeNB accessed by the RN forwards the paging request of the UE. 7. The method according to claim 1, wherein the obtaining the location information of the RN by the MME accessed by the UE from the core network node comprises: The MME accessed by the UE obtains the location information of the RN through the identity of the RN accessed by the UE or the TA' location area index, wherein the TA' location area is the location area under the RN serving the UE . 8. A network side device, characterized in that it includes a receiving module, a computing module and a sending module, The receiving module is configured to obtain new location information of the RN relay node; The computing module is configured to determine the paging range for paging the UE according to the acquired location information of the RN; The sending module is used for the MME accessed by the UE to initiate paging for the UE within the paging range. 9. The network side device according to claim 8, wherein the receiving module is used to obtain the new location information of the RN, including any of the following methods: When the location of the RN changes, the receiving module receives new location information of the RN from a target DeNB or a target MME; and The sending module is configured to request the current location information of the RN from all DeNBs associated with the RN, and then the receiving module acquires new location information of the RN. 10. The network side device according to claim 9, wherein the new location information of the RN includes: The DeNB, TAI or MME newly accessed by the RN. 11. The network side device according to claim 8, wherein the sending module is used to initiate paging to the UE within the paging range, including any of the following methods: The sending module is configured to send a paging request for paging the UE to a DeNB within the paging range; and The sending module is configured to map to the MME accessed by the RN according to the new location information of the RN, and send a paging request to the MME accessed by the RN, and the MME accessed by the RN sends a paging request to the MME accessed by the RN. The DeNB accessed by the RN forwards the paging request of the UE. 12. The network-side device according to any one of claims 8 or 11, wherein the network-side device comprises: an HSS home user server, a centralized MME, or an MME accessible to the UE under the RN; Wherein, the MME that the UE under the RN can access is an MME that supports the TA' location area serving the UE under the RN, and the TA' location area is the location area serving the UE under the RN . 13. The network side device according to claim 12, wherein the receiving module receiving the new location information of the RN from the target DeNB or the target MME further comprises: The target DeNB or target MME learns the MMEs that the UE can access according to the TA' location area.

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