CN113194517B

CN113194517B - Local routing processing method, device and storage medium

Info

Publication number: CN113194517B
Application number: CN202110372780.2A
Authority: CN
Inventors: 陈宁宇
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2016-10-11
Filing date: 2016-10-11
Publication date: 2023-01-20
Anticipated expiration: 2036-10-11
Also published as: CN107920378A; CN113194517A

Abstract

The embodiment of the invention discloses a local routing processing method, a device and a storage medium, wherein the method applied to a gateway or a base station comprises the following steps: receiving a Packet Data Convergence Protocol (PDCP) packet transmitted by a source User Equipment (UE); extracting a local routing label from the PDCP packet; and when the local routing label is extracted, transmitting the PDCP packet interacted between the two communication parties by using the local routing link.

Description

Local routing processing method, device and storage medium

The application is a divisional application of Chinese patent applications with application numbers of 201610889204.4, application dates of 2016, 10 and 11, and the name of the invention of a local routing processing method and device.

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a local routing processing method, device and storage medium.

Background

In the related art, a User Equipment (UE) initiates a service request to communicate with another UE, and a data packet between the two UEs passes through a core network. In specific implementation, it is found that such a data transmission manner occupies communication resources and may cause problems such as heavy load of a core network.

Disclosure of Invention

In view of the above, embodiments of the present invention are directed to a method, an apparatus, and a storage medium for local routing processing, which at least partially solve the above problems.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the embodiment of the invention provides a local routing processing method, which is applied to a gateway or a base station and comprises the following steps:

receiving a Packet Data Convergence Protocol (PDCP) Packet sent by source UE;

extracting a local routing label from the PDCP packet;

and when the local routing label is extracted, transmitting the PDCP packet interacted between the two communication parties by using the local routing link.

In the foregoing solution, the method further includes:

receiving a local routing instruction from a mobility management entity;

extracting communication identifiers of both communication parties from the local routing instruction, and storing the extracted communication identifiers;

and when the local routing label is extracted and the local routing is determined to be executed through the communication identifier, transmitting the PDCP packet interacted between the two communication parties by using a local routing link.

In the foregoing solution, the transmitting the PDCP packet exchanged between the two communication parties by using the local routing link includes:

when the extracted local routing label is detected to indicate the local routing of the single gateway, the gateway directly issues the PDCP packet sent by the source UE to a target base station connected with the target UE, so that the target base station issues the PDCP packet to the target UE.

when the extracted local routing label is detected to represent the local routing of the gateway level of the double gateways, the source gateway connected with the source UE forwards the PDCP packet sent by the source UE to the target gateway connected with the target UE, so that the target gateway sends the PDCP packet to the target UE through the target base station connected with the target UE.

In the above solution, the transmitting PDCP packets exchanged between two communication parties by using the local routing link includes:

and when the extracted local routing label is detected to represent the local routing of the single base station at the base station level, the base station directly sends the PDCP packet sent by the source UE to the target UE.

when the extracted local routing label is detected to represent the local routing of the base station level of the double base stations, the source base station connected with the source UE forwards the PDCP packet sent by the source UE to the target base station connected with the target UE, so that the target base station sends the PDCP packet to the target UE.

The embodiment of the invention also provides a local routing processing method, which is applied to the UE and comprises the following steps:

setting a local routing label in the PDCP packet;

sending a PDCP packet carrying the local routing label; the local routing tag is used for triggering a network to transmit a PDCP packet carrying the local routing tag by using a local routing link.

In the above scheme, the method further comprises:

receiving a local routing instruction;

extracting a communication identifier of the target UE from the local routing instruction;

and when a data packet is sent to the target UE, setting a local routing label in the PDCP packet.

In the above-mentioned scheme, the first step of the method,

when the received local routing instruction is a local routing instruction of a single gateway, the local routing label represents a local route of a gateway level of the single gateway;

or when the received local routing instruction is a local routing instruction of the dual gateway, the local routing label represents a local routing of the dual gateway at a gateway level;

or when the received local routing instruction is a local routing instruction of a single base station, the local routing label represents a base station-level local route of the single base station;

or, when the received local routing instruction is a local routing instruction of the dual base station, the local routing tag indicates a base station level local route of the dual base station.

An embodiment of the present invention further provides a local routing processing apparatus, which is applied in a gateway or a base station, and includes:

a third receiving unit, configured to receive a PDCP packet sent by the source UE;

a first extracting unit, configured to extract a local routing tag from the PDCP packet;

and a third sending unit, configured to transmit, by using the local routing link, a PDCP packet exchanged between the two communication parties when the local routing tag is extracted.

The embodiment of the invention also provides a local routing processing device, which is applied to the UE and comprises the following steps:

a generating unit, configured to set a local routing tag in the PDCP packet;

a fourth sending unit, configured to send a PDCP packet carrying the local routing tag; the local routing tag is used for triggering a network to transmit a PDCP packet carrying the local routing tag by using a local routing link.

An embodiment of the present invention further provides a storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of any one of the methods at the gateway side or the base station side, or implements the steps of any one of the methods at the UE side.

In the local routing processing method, the device and the storage medium provided by the embodiment of the invention, the gateway or the base station receives the PDCP packet sent by the source UE; extracting a local routing label from the PDCP packet; and when the local routing label is extracted, transmitting the PDCP packet interacted between the two communication parties by using the local routing link. Therefore, the corresponding equipment receives the local routing instruction to carry out local routing, and the data packet does not bypass the core network and is only transmitted in the local routing equipment below the gateway. Therefore, the problems of long transmission path and long transmission delay caused by the fact that data can wrap the core network can be reduced, and the problem of heavy load of the core network can be reduced. In summary, the local routing processing method, the local routing processing device, and the storage medium provided in the embodiments of the present invention have the characteristics of small transmission delay, high transmission efficiency, and small occupied communication resources when transmitting a data packet.

Drawings

Fig. 1 to fig. 4 are schematic flow diagrams of a local routing processing method according to an embodiment of the present invention;

fig. 5 to fig. 8 are schematic structural diagrams of a local routing processing apparatus according to an embodiment of the present invention;

fig. 9 is a schematic diagram illustrating a comparison between packet transmission of a local route and a previous network route according to an embodiment of the present invention;

fig. 10 to fig. 13 are schematic flow charts of a local routing processing method according to an embodiment of the present invention;

Detailed Description

The technical solution of the present invention is further described in detail with reference to the drawings and specific embodiments.

As shown in fig. 1, the present embodiment provides a local routing processing method, which is applied in a Mobility Management Entity (MME), and includes:

step S110: acquiring communication identifiers of two communication parties;

step S120: determining whether a gateway-level local routing condition or a base station-level local routing is met according to the communication identifier;

step S131: when the local routing condition of the gateway level is met, sending a first type of local routing instruction to a preset gateway and/or the communication parties; the predetermined gateway is a gateway commonly connected with both communication parties, or the predetermined gateway comprises a source gateway and a target gateway which are established with a direct connection link; the source gateway is a gateway connected with source UE in the two communication parties; the target gateway is a gateway connected with the target UE; the first type of local routing instruction is used for controlling both communication parties to transmit data packets of both communication parties based on a gateway-level local routing link;

step S132: when the local routing condition of the base station level is met, sending a second type of local routing instruction to a preset base station and/or the two communication parties; the predetermined base station is a base station which is connected by both communication parties together, or the predetermined base station comprises a source base station and a target base station which are established with a direct link; the source base station is a base station connected with the source UE; the target base station is a base station connected with the target UE; the second type of local routing instruction is used for controlling the two communication parties to transmit data packets of the two communication parties based on a local routing link at a base station level.

The two communication parties of this embodiment include a source UE and a target UE, where the source UE is one end that sends a data packet; the target UE is one end for receiving the data packet.

The local routing processing method according to this embodiment is applied to an MME. The MME may be a source MME (ommme) or a target MME (tmmme). The oMME is an MME connected with the source UE; and the tMME is an MME connected with the target UE.

The base station may be an evolved node b (eNB), and the gateway may be a communication device or a network element such as a serving gateway (S-GW). The source gateway Identifier and the destination gateway Identifier may be, but are not limited to, a Tunnel Endpoint Identifier (TEID) of a corresponding gateway.

In step S110, communication identifiers of the source UE and the target UE are obtained, where the communication identifiers may be International Mobile Subscriber Identity (IMSI) or International Mobile Equipment Identity (IMEI) of the source UE and the target UE directly. The communication identifier may also include a temporary identifier assigned to the UE by the communication network, and is not limited to any of the above.

After the UE connects to the network, the network side records the base station and the gateway connected to the UE, so in this embodiment, the MME may obtain information of the gateway or the base station connected to the UE according to the communication identifier of the UE, thereby determining whether the current communication between the two parties of communication can perform local routing. In this embodiment, the local routes include two levels, one is a gateway level local route, and the other is a base station level local route. If the data packet is transmitted by using the local routing link at the gateway level, the data packet is only transmitted to the communication device at the gateway level, and is not transmitted by using the upper layer device above the gateway, for example, the local routing link at the gateway level does not include the core network device of the core network. In this way, the data packet can be smoothly transmitted by using the local routing link at the gateway level, and the data packet cannot bypass the core network for transmission. If the data packet is transmitted by using the local routing link at the base station level, the data packet is only transmitted to the communication device at the base station level, and is not transmitted by using the upper layer device above the base station, for example, the local routing link at the base station level does not include the core network device of the gateway and the core network. In this way, the data packet can be smoothly transmitted by using the local routing link at the base station level, and the data packet cannot bypass the gateway and the core network for transmission.

Therefore, by using the local routing processing method described in this embodiment, data packets of both communication parties can be controlled to be transmitted by using the local routing link, so that devices through which the data packets pass can be reduced, a path through which the data packets pass is shortened, transmission delay is reduced, the number of the data packets which need not be forwarded to the core network is reduced, the data packets which can be transmitted only in the local routing link occupy transmission resources of the core network, the network load of the core network is prevented from being increased, and the phenomenon that the core network is too busy due to the reason is reduced.

The local routing links may include a gateway level local routing link and a base station level local routing link, and the processing of the two local routes is described below separately.

The gateway level local routing links may include a variety of methods, two alternatives are introduced below:

in a first mode

The step S120 may include:

acquiring a source gateway identifier of the source gateway and a target gateway identifier of the target gateway according to the communication identifier;

determining whether the source gateway identifier and the target gateway identifier are the same;

and when the source gateway identification is the same as the target gateway identification, determining that the local routing condition of the gateway level is met.

After the UE attaches to the network, the communication identifier of the UE is stored in the network and establishes a corresponding relationship with a device connected to the UE in the network, so in this embodiment, the MME may obtain the source gateway identifier and the target gateway identifier by using the communication identifier as a query basis.

After the source gateway identification and the target gateway identification are obtained, the two gateway identifications are compared to determine whether the local routing at the gateway level can be carried out. When the source gateway identification is the same as the target gateway identification, the source gateway identification and the target gateway identification represent that both communication parties are connected under the same gateway, so that data packets of both communication parties can be directly transmitted only through the gateway and lower-layer equipment of the gateway without passing through a core network, thereby reducing communication equipment through which the data packets pass, shortening the distance traveled by the data packets and reducing the load of the core network.

Correspondingly, the step S131 may include:

when the local routing condition of the gateway level is met, sending a first type of local routing instruction carrying communication identifiers of both communication parties to a gateway which is connected with both communication parties together;

and/or the presence of a gas in the gas,

when the local routing condition of the gateway level is met, sending a first type of local routing instruction carrying the communication identifier of the target UE to the source UE; and when the local routing condition of the gateway level is met, sending a first type of local routing instruction carrying the communication identifier of the source UE to the target UE.

In this embodiment, the gateway receives data packets sent by a plurality of UEs, and determines which specific data packets sent by the UEs need to perform gateway-level local routing, in this embodiment, the MME sends a first type of local routing instruction to the gateway, and the first type of local routing instruction sent to the gateway includes communication identifiers of both communication parties.

When the source UE and the target UE communicate with each other, the source UE sends a data packet to the target UE, and the source UE can know which UE the data packet sent to can perform local routing through receiving the first type of local routing instruction. The local routing label in this manner may be a first local routing label, which may be indicative of transmission of the data packet using a local routing link that includes only a gateway level that passes through only one gateway.

In a specific implementation process, the first type of routing instructions received by the source UE and the target UE may be different or the same. For example, when the first type of local routing instruction only carries one communication identifier, the first type of local routing instruction sent to the source UE carries the communication identifier of the target UE, and the first type of local routing instruction sent to the target UE carries the communication identifier of the active UE. When the first type of local routing instruction carries two communication identifiers, the first type of local routing instruction can carry the communication identifiers of two communication parties. If the first-type local routing instruction sent to the UE only carries one communication identifier, the data size of a single first-type local routing instruction can be reduced, and if the first-type local routing instruction carries two communication identifiers at the same time, the type of the first-type local routing instruction can be reduced. In this embodiment, the first local routing instruction preferably carries communication identifiers of both communication parties at the same time, so that the first local routing instructions sent to the UE and the gateway may be the same.

In a specific implementation, the first type of local routing instruction sent to the UE may further carry a first indication identifier, where the first indication identifier is used to notify the UE of performing gateway-level local routing, and in this way, when the UE generates the first local routing tag, the UE may generate a tag corresponding to the first type of local routing instruction, and when a corresponding data packet is received by the network side, according to the first local routing tag, it may be known that the gateway-level local routing is performed, and the data packet may be uploaded to the corresponding gateway all the time.

The second method comprises the following steps:

the step S120 may include:

determining whether a direct connection link is established between a source gateway and a target gateway according to a source gateway identifier and a target gateway identifier;

and when the direct connection link is established between the source gateway and the target gateway, determining that the local routing condition of the gateway level is met.

In this embodiment, the direct connection link is a transmission link established between two gateways without introducing a third-party device, and the transmission of the data packet by using the direct connection link does not pass through other devices except devices at two ends of the direct connection link.

For example, in this embodiment, a direct link is established between the source gateway and the target gateway, and when performing gateway-level local routing in this manner, the data packet is transmitted through the source gateway, the target gateway, the source gateway, and the lower layer device of the target gateway. The transmission of the data packet in the first mode is performed through only one gateway.

Correspondingly, the step S131 includes:

sending a first type of local routing instruction at least carrying the target gateway identification and the communication identification of the two communication parties to the source gateway; sending a first type of local routing instruction at least carrying the source gateway identification and the communication identification of the two communication parties to the target gateway;

and/or the presence of a gas in the gas,

In this embodiment, it is necessary to know that data transmission is performed by using a local routing link at a gateway level, and a source gateway needs to know to which gateway a data packet is sent, and which data packets of the UE can perform local routing at the gateway level, so that a first type of local routing instruction sent to the gateway can carry a gateway identifier of an opposite-end gateway and communication identifiers of both communication parties. The first type of local routing instruction sent to the UE at least carries a communication identifier of the opposite UE. Here, the peer UE is relatively, the peer UE of the source UE is the target UE, and the peer UE of the target UE is the source UE. In this embodiment, the UE receives the first type of local routing instruction and may add a second local routing tag, where the second local routing tag may be a tag corresponding to a high-speed network side device, and the data packet may be transmitted by using a local routing link passing through two direct-connected gateways.

In this manner, it is preferable that the first type of local routing instruction simultaneously carries a source gateway identifier, a target gateway identifier, and communication identifiers of both communication parties, so that the type of the first type of local routing instruction can be reduced.

The local routing link at the base station level may also include a variety of methods, two alternatives are introduced below:

the first method is as follows:

the step S120 may include:

acquiring a source base station identifier of the source base station and a target base station identifier of the target base station according to the communication identifier;

determining whether the source base station identifier and the target base station identifier are the same;

and when the source base station identification is the same as the target base station identification, determining that the local routing condition of the base station level is met.

In this embodiment, it is equivalent to determining whether the source UE and the target UE are connected to the same base station, where the base station may be an eNB, and the source base station identifier and the target base station identifier are both one of the base station identifiers, and may be TEIDs of the base stations.

When two communication parties are connected under one base station, obviously, the base station can be used for directly transferring data packets of the two communication parties, and equipment except the base station is not used for transferring, so that the local routing condition of the base station level can be considered to be met.

Correspondingly, the step S132 may include:

sending a second type local routing instruction comprising communication identifiers of the two communication parties to a base station which is connected with the two communication parties together;

and/or the presence of a gas in the atmosphere,

sending a second type local routing instruction carrying the communication identifier of the target UE to the source UE; and sending a second type local routing instruction carrying the communication identifier of the source UE to the target UE.

The second type of local routing instruction is similar to the first type of local routing instruction, and in short, is used to trigger the corresponding device to know that the local routing can be performed and to execute the operation related to the local routing.

The second method comprises the following steps:

the step S120 further includes:

determining whether a direct link is established between the source base station and the target base station or not according to the base station identification;

and when a direct link is established between the source base station and the target base station, determining that the local routing condition of the base station level is met.

The direct link is similar to the direct link between the gateways, and the difference is that the source base station and the target base station are connected to both ends of the direct link.

Here, the packet relay may be performed only by both communicating with the source base station and the target base station, and not by the base station and the upper layer device above the base station.

Correspondingly, the step S132 may include:

sending a second type local routing instruction carrying the base station identifier of the target base station to the source base station; sending a second type local routing instruction carrying the base station identifier of the source base station to the target base station;

and/or the presence of a gas in the atmosphere,

In the same embodiment, the second type local routing instructions sent to different base stations and/or different UEs may be the same or different, and when the second type local routing instructions are the same, the second type local routing instructions carry communication identifiers of both communication parties and base station identifiers of the source base station and the target base station.

In summary, in a specific implementation, the first type of local routing instruction and the second type of local routing instruction may carry a label indicating a local routing level. The first type of local routing instruction may indicate the number of gateways through which the local routing link at the gateway level passes, and the second type of local routing instruction may indicate the number of base stations through which the local routing link at the base station level passes, and the number of base stations may be divided into two types. Therefore, the UE can add the corresponding label when sending the data packet conveniently, and the rapid data processing of the follow-up base station and the gateway is facilitated. For example, according to the corresponding local routing label added by the UE, the corresponding local routing link is used to perform fast forwarding of the data packet.

Further, the method may further include:

receiving a communication request of the source UE; the communication request can carry a communication identifier of the target UE and a service identifier of the requested communication. Therefore, in step S110, the communication request can be parsed, and the communication identifiers of the two parties of communication can be obtained according to the source of the communication request. In addition, before determining whether to perform the local routing at the base station level or the local routing at the gateway level, it is further determined whether the service currently requesting communication supports the local routing according to the service identifier, for example, if the service needs to be processed by a network element of a core network, the service does not support the local routing, and the step S120 does not need to be performed, or if the determination result of the step S120 is negative. In this way, whether to perform local routing may be determined according to the traffic demands of different services.

As shown in fig. 2, this embodiment provides a local routing processing method, applied in a gateway or a base station, including:

step S210: receiving a local routing instruction from the MME; the local routing instruction is a first type of local routing instruction sent to the gateway or a second type of local routing instruction sent to the base station;

step S220: according to the local routing instruction, a local routing link is utilized to transmit data packets interacted between two communication parties; wherein, the transmitting the data packet interacted between the two communication parties by using the local routing link according to the local routing instruction is as follows: and the gateway transmits the data packet interacted between the two communication parties by using the local routing link at the gateway level according to the first type of local routing instruction, or the base station transmits the data packet interacted between the two communication parties by using the local routing link at the base station level according to the second type of local routing instruction.

The MME may be an MME or tmeg.

In step S210, the base station receives the second type local routing instruction, and the gateway receives the first type local routing instruction.

In step S220, the base station performs local routing at the base station level based on the second type local routing instruction, and the gateway performs local routing at the gateway level based on the first type local routing instruction. The detailed description of the local routing at the base station level and the local routing at the gateway level can be referred to the foregoing embodiments, and will not be repeated here.

In some cases, the first type of local routing instruction and the second type of local routing instruction are not only sent to a base station or a gateway, but also sent to the UE, and when the UE sends a data packet, the UE adds a local routing tag to the data packet; in this case, after receiving the data packet, if the base station or the gateway acquires the local routing tag from the data packet, the base station or the gateway analyzes the data packet to obtain communication identifiers of both communication parties, and then determines whether to adopt a local route according to the communication identifiers; and if the local route is adopted, transmitting the data packet by using the corresponding local route link.

In this embodiment, after receiving the local routing instruction sent by the MME, the base station or the gateway correspondingly stores the communication identifiers of both communication parties and sets the corresponding local routing identifier, so that after detecting the corresponding local routing tag or detecting the data packet of the corresponding UE, the base station or the gateway can determine whether to execute the local routing by querying the information.

As shown in fig. 3, this embodiment provides a local routing processing method, applied in a gateway or a base station, including:

step S310: receiving a data packet sent by source UE;

step S320: extracting a local routing tag from the data packet;

step S330: and when the local routing label is extracted, transmitting the data packet interacted between the two communication parties by using the local routing link.

When the method is applied to the base station, the base station executes the local routing at the base station level, and if the method is applied to the gateway, the local routing at the gateway level is executed.

In this embodiment, the local routing tag may be added by the source UE based on a first type of local routing instruction or a second type of local routing instruction sent by an MME;

at this time, the local routing tags carried in the data packets include multiple types, which respectively correspond to the first type of local routing instruction and the second type of local routing instruction. The first type of local routing instruction can be divided into at least two types, namely a local routing instruction of a single gateway and a local routing instruction of a double gateway; the second type of local routing instruction can be divided into at least two types, namely a local routing instruction of a single base station and a local routing instruction of double base stations. After receiving the corresponding local routing instruction, the UE adds the corresponding local routing tag according to the various local routing instructions when sending the data packet to the target UE. For example, the local routing label may include two bits that indicate the four local routes described above, respectively. And after receiving the data packet, the base station and the gateway extract the local routing label and adopt the corresponding local routing link to transmit the data packet.

For example, if the local routing label is "00", which indicates a base station-level local routing of a single base station, after receiving a data packet sent by the source UE, the base station detects the local routing label, and directly sends the local routing label to the target UE without forwarding the local routing label to other base stations and gateways.

For example, if the local routing tag is "01", which indicates a base station-level local routing of the dual base stations, the source base station detects the local routing tag after receiving a data packet sent by the source UE, and forwards the target base station, and the target base station extracts the local routing tag after receiving the data packet, and directly sends the local routing tag to the target UE.

For example, the local routing label is "10" and indicates a gateway-level local routing of a single gateway, and after receiving a data packet sent by a source UE, the gateway detects the local routing label, and directly issues the local routing label to a target base station of a target UE without forwarding the local routing label to other gateways, and the local routing label is issued by the target base station to the target UE.

For example, the local routing tag is "11" and indicates a gateway-level local routing of a dual gateway, and the source gateway detects the local routing tag after receiving a data packet sent by the source UE, and forwards the target gateway, and the target gateway extracts the local routing tag after receiving the data packet, and sends the local routing tag to a target base station of the target UE, and the target base station sends the local routing tag to the target UE.

As shown in fig. 4, this embodiment further provides a local routing processing method, which is applied to a UE, where the UE may be a source UE or a target UE. The method comprises the following steps:

step S410: receiving a local routing instruction from the MME;

step S420: extracting a communication identifier of a target UE from the local routing instruction;

step S430: generating a local routing label when transmitting a data packet to the target UE;

step S440: sending a data packet carrying the local routing label; the local routing label is used for triggering a network to transmit a data packet carrying the local routing label by using a local routing link.

After receiving the local routing instruction, when the UE sends a data packet to the target UE, it may know that the local routing is possible, and in order to facilitate processing by the base station or the gateway, the base station or the gateway may forward the data packet with the corresponding local routing label by using the corresponding local routing link after receiving the data packet with the corresponding local routing label.

For the generation of the local routing label, reference may be made to the method used in the foregoing embodiment.

Further details are provided below in connection with any of the above-described aspects.

For example, in step S110, when the execution subject is the mme, the mme may obtain the TEID of the source base station by querying the local database, by transmitting the second communication identity to the tmeg, and receive the TEID of the target base station queried based on the second communication identity from the tmeg. If the execution main body is the tMME, the oMME inquires a local database according to the first communication identifier after acquiring communication identifiers of both communication parties, acquires the TEID of the source base station and sends the second communication identifier to the tMME, so that the tMME inquires the local database according to the second communication identifier to acquire the TEID of the target base station, and the subsequent matching of the TEIDs of the two base stations is facilitated.

For example, the step S120 may include:

acquiring a source gateway where source UE is located; the method for acquiring the source gateway where the source UE is located is similar to the method for acquiring the source base station to which the source UE is connected, and for example, the mme determines the source gateway according to the method for sending the communication request message and the gateway to which the mme itself is connected; or directly querying data of a local database or other MME according to the first communication identifier of the source UE to determine the source gateway; acquiring a target gateway identifier where the target UE is located according to the second communication identifier of the target UE; and when the source gateway and the target gateway are the same gateway, determining that the two communication parties meet the local routing condition of the base station level.

In some cases, the two communicating parties may not be connected to the same base station, but are connected to different base stations connected to the same gateway, at this time, the gateways connected to the two communicating parties may be determined according to the communication identifiers of the two communicating parties, and if the connected gateways are the same, it may be considered that the local routing condition at the base station level is satisfied.

For example, the TEIDs of the source gateway and the target gateway may be obtained, and whether the source gateway and the target gateway are the same gateway may be determined by comparing the TEIDs of the source gateway and the target gateway. Of course, if the TEIDs of the source gateway and the target gateway are the same, it is obvious that the source gateway and the target gateway are the same gateway.

When the execution subject is the oMME, the oMME can obtain the TEID of the source gateway by inquiring a local database, sends the second communication identification to the tMME, and receives the TEID of the target gateway inquired based on the second communication identification from the tMME. If the execution main body is the tMME, the oMME queries a local database according to the first communication identifier after obtaining the communication identifiers of the two communication parties, obtains the TEID of the source gateway and sends the second communication identifier to the tMME, so that the tMME queries the local database according to the second communication identifier to obtain the TEID of the target gateway, and the subsequent matching of the TEIDs of the two gateways is facilitated.

In this embodiment, the step S120 may simultaneously perform the determination of the gateway-level local routing condition and the determination of the base station-level local routing condition, or may first perform the determination of the gateway-level local routing condition, and then perform the determination of the second local routing condition if the gateway-level local routing condition is not satisfied. Or, the determination of the local routing condition at the base station level may be performed first, and if the local routing condition at the base station level satisfies the local routing condition at the base station level, the determination of the local routing condition at the base station level may be performed again.

Of course, in a specific implementation process, only one of the aforementioned gateway-level local routing condition and base station-level local routing condition may be performed, for example, only the determination of the base station-level local routing condition is performed.

In a specific implementation, the mme and the tmeg may exchange the TEID of the base station and/or the gateway and the communication identifier through a Local Switch (LS) request message. Preferably, when the execution subject is the mme, the TEID of the target base station and the TEID of the target gateway are received from the tmeg, which facilitates the mme to execute the determination whether the local routing condition at the gateway level and/or the local routing condition at the base station level is satisfied. When the execution main body is tMME, the TEID of the source base station, the TEID of the source gateway and the second communication identifier are received from the oMME, so that the tMME can conveniently execute the determination of whether the local routing condition at the gateway level and/or the local routing condition at the base station level are met.

In some embodiments, the step S130 may include:

when the two communication parties meet the local routing condition of the gateway level, the first type of local routing instruction is sent to the source base station; the first local routing instruction is used for triggering the forwarding of the data packet interacted between the two communication parties only through the source base station. In this case, the source base station is a base station to which the source UE and the target UE are connected, and it is obvious that the data packet exchanged between the source UE and the target UE can be directly forwarded through the source base station, and not through an upper device of the source base station, for example, a gateway connected to the source base station.

In other embodiments, when the two communication parties only satisfy the local routing condition at the base station level, a second type of local routing instruction is sent to the source gateway; and the second type of local routing instruction is used for triggering the source gateway to forward the data packet interacted between the source base station and the target base station. In this embodiment, the source UE and the target UE are connected to different UEs of the same gateway, and in this embodiment, the source gateway is a gateway where the source UE and the target UE are located at the same time, so that in this embodiment, a local routing instruction may be sent to the source gateway by an MME, and when performing data transmission, after receiving a data packet exchanged between the source UE and the target UE, the source gateway does not send the data packet to an upper layer communication device, for example, a predetermined communication device in a core network, but sends the data packet to a lower layer communication device of the gateway, for example, a base station, so that transmission of the data packet is performed between the source base station and the target base station, and thus data transmission between both communication parties is completed by using a local routing link, and data transmission around the core network is avoided.

In this embodiment, the MME is an MME;

the method further comprises the following steps: the oMME receives a service request sent by source UE; the oMME is connected with the source UE; wherein the service request includes a second communication identifier of the target UE. In this embodiment, the service request sent by the source UE is modified, and the service request directly carries the communication identifier of the target UE, where the communication identifier may correspond to the aforementioned mobile phone number or the personal handphone number. Of course, the mme may also obtain the communication identifier of the target UE through other signaling sent by the source UE.

The method may further comprise: and responding to the service request, and extracting the second communication identification from the service request. After the communication identifier of the source UE is obtained, since the service request comes from the source UE, it is obvious that the mme may determine the first communication identifier of the source UE according to the source of the service request.

In some cases, the MME is a tmeg; the step S110 may include: and receiving communication identifications of the two communication parties from the oMME. In this embodiment, the main execution body is tmes, and the mme may acquire communication identifiers of both communication parties based on various signaling sent by the source UE such as a service request, and then receive the communication identifiers of both communication parties from the mme.

In this embodiment, the local routing instruction is further configured to trigger the predetermined communication device (base station or gateway) to establish a pairing table; the pairing table comprises the first communication identifier, the second communication identifier and the identification information of the local route; the identification information is used for being carried in a data packet interacted between the source UE and the target UE, and is used for the preset communication equipment to inquire the communication identification of the target UE according to the identification information so as to execute local routing according to the communication identification of the target UE.

The local routing instruction is further used for triggering the preset communication equipment to establish a pairing table; wherein the pairing table is used for the predetermined communication equipment to inquire the communication identification of the receiving UE so as to send the data packet to the target UE by using a local routing link. In this embodiment, the pairing table at least includes communication identifiers of the two communication parties. The target UE may be a source UE or a target UE, and obviously, the communication identifier of the target UE may be queried in the pairing table. In this way, even if the packet transmitted by both communication parties does not directly include the communication identifier of the target UE, the communication identifier of the target UE can be queried based on the communication identifier of the transmitting UE or other identifier information. The target UE is a UE that receives a data packet, and the sending UE is a UE that sends a data packet.

The pairing table comprises communication identifiers of both communication parties and identification information of the local route; the identification information is used for being carried in data packets interacted between the two communication parties, and is used for the preset communication equipment to inquire the communication identification of the received UE according to the identification information so as to send each data packet to the target UE by using a local routing link.

The identification information here may be a local routing tag or a local routing tag. And the local routing tag is used for triggering a preset communication device to inquire the identification information of the pairing table. The local routing tag is usually stored in the matching table and is stored corresponding to communication identifiers of two communication parties, and the second communication identifier not only triggers a predetermined communication device to inquire identification information of the matching table, but also inquires a basis of the matching table. The second communication identification may be assigned to the predetermined communication device. In this embodiment, the predetermined communication device may be a communication device such as a base station or a gateway connected in common between two communication parties, for example, the source base station or the source gateway.

In some cases, the method further comprises:

the base station or the gateway extracts the communication identifiers of the two communication parties from the local routing instruction;

forming a pairing table comprising the communication identification;

and when receiving the data packet interacted between the two communication parties, inquiring the pairing table according to the communication identification to determine whether to adopt local routing link transmission.

In order to make better use of the local routing link for data transmission in this embodiment, at least a pairing table including communication identifiers of both communication parties is established in this embodiment. Therefore, after the data packet sent by at least one of the two communication parties is forwarded to the predetermined communication equipment, when the predetermined communication equipment does not have the communication identifier of the target UE in the data packet, the communication identifier of the target UE can be obtained by inquiring the pairing table based on the communication identifier of the sending UE or other identifier information, and then the local routing link is utilized for communication.

In some embodiments, the base station or the gateway further extracts a local routing tag from a data packet exchanged between the two communication parties when the data packet is received; and when the local routing label is extracted, querying the pairing table to acquire the communication identification of the target UE.

Here, the local routing tag is identification information indicating that the data packet is communicated by using a local routing link, so that the predetermined device may query the matching table, and may send a communication identifier of the UE as a query basis when querying the matching table. The local routing tag may be assigned to the predetermined communication device, or may be predefined, or default, or negotiated in advance.

In other embodiments, the method further comprises: distributing local routing labels of local routes for the two communication parties; sending the local routing label to the two communication parties; the forming a pairing table including the communication identification comprises: forming a pairing table comprising the communication identification and the local routing label; when receiving the data packet interacted between the two communication parties, querying the pairing table to determine the target UE of the data packet includes: when receiving the data packet interacted by the two communication parties, extracting the local routing label of the local route from the data packet; and inquiring the pairing table to acquire the communication identification of the target UE based on the local routing label.

In this embodiment, the predetermined communication device further allocates a local routing tag uniquely identifying both communication parties, where the local routing tag may be carried in a data packet, and after receiving the local routing tag, the predetermined communication device queries the pairing table by using the local routing tag as a query basis to obtain the communication identifier of the target UE.

In some embodiments, said forwarding, in response to said local routing instruction, a packet between the source UE and the target UE to the lower layer communication device using local routing, comprises: extracting the communication identification of the target UE from the data packet; and sending the data packet to the target UE through the lower layer communication equipment of the preset communication equipment by using a local route.

In this embodiment, when the UE knows that the current communication is performed by using the local routing link, the UE directly carries the communication identifier of the target UE at a position in the data packet that can be directly extracted by the predetermined communication device, so that after the predetermined communication device receives the data packet, the communication identifier of the target UE can be directly extracted, and it can be considered that the current communication is performed by using the local routing link to directly forward the data packet, that is, the lower-layer communication device of the predetermined communication device transmits the data packet, but not the upper-layer communication device transmits the data packet.

It is worth noting that: the method may further comprise:

the predetermined communication equipment extracts predetermined information from the data packet, where the predetermined information may be a communication identifier, a local routing tag or a local routing tag of the target UE;

and determining the communication identification of the target UE according to the predetermined information. For example, under the trigger of a local routing label, the pairing table is queried; for another example, the pairing table is queried according to a local routing label; or directly determining the communication identifier of the target UE according to the preset information;

after obtaining the communication identifier of the target UE, the data packet is sent by using the local routing link, for example, the data packet is sent to a lower layer communication device of the predetermined communication device, and the data packet is forwarded by the lower layer communication device.

In this embodiment, the predetermined communication device is a base station or a gateway. The base station may be an eNB, and the gateway may be a communication device or a network element such as an S-GW.

The embodiment provides an information interaction method applied to a UE, including:

receiving a local routing instruction sent by two communication parties when the two communication parties meet local routing conditions;

sending a data packet carrying predetermined information to a base station;

the predetermined information is used for determining a target UE when the predetermined communication equipment transmits the data packet by using a local routing link; the predetermined communication device is the base station or a gateway connected with the base station.

In this embodiment, the UE may be a source UE or a target UE, and in short, may be one UE of both communication parties.

In this embodiment, the UE receives the local routing instruction, and after receiving the local routing instruction, adds predetermined information to the data packet when sending the data packet, so as to indicate to the predetermined communication device that the data packet is a data packet transmitted by the local routing link, thereby avoiding transmission delay and occupation of communication resources of the upper link caused by the data packet of the upper link when the data packet does not need to be sent to the upper link.

In some embodiments, the sending the data packet carrying the predetermined information to the base station may include:

sending a data packet carrying a local routing label to a base station;

the local routing tag is used for triggering a preset communication device to inquire a pairing table comprising communication identifiers of both communication parties so as to acquire the communication identifier of the target UE.

In other embodiments, the method further comprises:

receiving local routing labels distributed by preset communication equipment for both communication parties;

the sending the data packet carrying the predetermined information to the base station may include:

sending a data packet carrying a local routing label to a base station;

and the local routing label is a query basis for querying the pairing table for the preset communication equipment.

In some further embodiments, the sending the data packet carrying the predetermined information to the base station may further include: and sending a data packet carrying the communication identifier of the target UE to the base station.

In addition, in this embodiment, in order to facilitate the MME to obtain the communication identifiers of the two communication parties, the method may further include: and the source UE sends a service request carrying the second communication identifier of the target UE, so that the MME can simply and conveniently obtain the communication identifier of the target UE through information analysis when receiving the service request.

As shown in fig. 5, this embodiment provides a local route processing apparatus, which is applied in an MME, and includes:

an obtaining unit 110, configured to obtain communication identifiers of two communicating parties;

a first determining unit 120, configured to determine whether a local routing condition at a gateway level or a local routing at a base station level is satisfied according to the communication identifier;

a first sending unit 130, configured to send a first type local routing instruction to a predetermined gateway and/or both communication parties when a local routing condition at the gateway level is satisfied; the predetermined gateway is a gateway commonly connected with both communication parties, or the predetermined gateway comprises a source gateway and a target gateway which are established with a direct connection link; the source gateway is a gateway connected with source UE in the two communication parties; the target gateway is a gateway connected with the target UE; the first type of local routing instruction is used for controlling both communication parties to transmit data packets of both communication parties based on a gateway-level local routing link;

the first sending unit 130 is further configured to send a second type local routing instruction to a predetermined base station and/or both communication parties when the local routing condition at the base station level is met; the predetermined base station is a base station which is connected by both communication parties together, or the predetermined base station comprises a source base station and a target base station which are established with a direct link; the source base station is a base station connected with the source UE; the target base station is a base station connected with the target UE; the second type of local routing instruction is used for controlling the two communication parties to transmit data packets of the two communication parties based on a local routing link at a base station level.

The obtaining unit 110 may correspond to a communication interface, which may be a wired interface or a wireless interface, may receive the communication identifier from other communication devices, and may also correspond to a processor or a processing circuit, and may obtain the communication identifier by querying a local or remote database.

The first determination unit 120 may correspond to a processor or a processing circuit. The processor or processing circuit may implement the corresponding functions of the respective units through execution of predetermined instructions. The processor may include a Central Processing Unit (CPU), microprocessor (MCU), digital Signal Processor (DSP), programmable array (PLC), or Application Processor (AP), among others. The processing circuitry may comprise an Application Specific Integrated Circuit (ASIC), or the like.

The first sending unit 130 may correspond to a communication interface in the MME for communicating with the communication device for MME connection. The communication interface can communicate with communication equipment such as a gateway or a base station, and at least the equipment adopts a local routing link to transmit data packets of both communication parties by sending the local routing instruction, so that the problems of large transmission delay and large occupied communication resources caused by the transmission of the data packets by bypassing the upper layer communication equipment are solved.

In some embodiments, the first determining unit 120 is specifically configured to obtain, according to the communication identifier, a source gateway identifier of the source gateway and a target gateway identifier of the target gateway; determining whether the source gateway identifier and the target gateway identifier are the same; and when the source gateway identification is the same as the target gateway identification, determining that the local routing condition of the gateway level is met. Correspondingly, the first sending unit 130 is specifically configured to send a first type local routing instruction carrying communication identifiers of both the communication parties to a gateway commonly connected to both the communication parties when the local routing condition at the gateway level is met; and/or when the local routing condition of the gateway level is met, sending a first type local routing instruction carrying the communication identifier of the target UE to the source UE; and when the local routing condition of the gateway level is met, sending a first type of local routing instruction carrying the communication identifier of the source UE to the target UE.

In other embodiments, the first determining unit 120 is specifically configured to obtain, according to the communication identifier, a source gateway identifier of the source gateway and a target gateway identifier of the target gateway; determining whether a direct connection link is established between a source gateway and a target gateway according to a source gateway identifier and a target gateway identifier; and when the direct connection link is established between the source gateway and the target gateway, determining that the local routing condition of the gateway level is met. Correspondingly, the first sending unit 130 is specifically configured to send, to the source gateway, a first type local routing instruction at least carrying the target gateway identifier and the communication identifiers of the two communication parties; sending a first type of local routing instruction at least carrying the source gateway identification and the communication identification of the two communication parties to the target gateway; and/or when the local routing condition of the gateway level is met, sending a first type of local routing instruction carrying the communication identifier of the target UE to the source UE; and when the local routing condition of the gateway level is met, sending a first type of local routing instruction carrying the communication identifier of the source UE to the target UE.

In some embodiments, the first determining unit 120 is specifically configured to obtain, according to the communication identifier, a source base station identifier of the source base station and a target base station identifier of the target base station; determining whether the source base station identifier and the target base station identifier are the same; and when the source base station identification is the same as the target base station identification, determining that the local routing condition of the base station level is met. Correspondingly, the first sending unit 130 is specifically configured to send a second type local routing instruction including communication identifiers of the two communication parties to a base station to which the two communication parties are commonly connected; and/or sending a second type local routing instruction carrying the communication identifier of the target UE to the source UE; and sending a second type local routing instruction carrying the communication identifier of the source UE to the target UE.

In other embodiments, the first determining unit 120 is specifically configured to determine, according to a base station identifier, whether a direct link is established between the source base station and the target base station; and when a direct link is established between the source base station and the target base station, determining that the local routing condition of the base station level is met. The second sending unit 130 is specifically configured to send a second type local routing instruction carrying the base station identifier of the target base station to the source base station; sending a second type local routing instruction carrying the base station identifier of the source base station to the target base station; and/or sending a second type local routing instruction carrying the communication identifier of the target UE to the source UE; and sending a second type local routing instruction carrying the communication identifier of the source UE to the target UE.

In short, the present embodiment provides an MME that can perform local routing determination, shorten a transmission path of a data packet, improve transmission efficiency, and reduce occupation of core network resources.

As shown in fig. 6, a local routing processing apparatus in this embodiment is applied to a gateway or a base station, and includes:

a second receiving unit 210, configured to receive a local routing instruction from the MME; the local routing instruction is a first type of local routing instruction sent to the gateway or a second type of local routing instruction sent to the base station;

a second sending unit 220, configured to transmit, according to the local routing instruction, a data packet exchanged between two communication parties by using a local routing link; wherein, the transmission of the data packets sent by the two communication parties by using the local routing link according to the local routing instruction is as follows: and the gateway transmits the data packet interacted between the two communication parties by using the local routing link at the gateway level according to the first type of local routing instruction, or the base station transmits the data packet interacted between the two communication parties by using the local routing link at the base station level according to the second type of local routing instruction.

The second receiving unit 210 and the second transmitting unit 220 may correspond to a communication interface in a base station or a gateway.

In some embodiments, the second receiving unit 210 is specifically configured to receive a local routing instruction carrying communication identifiers of two communication parties; the second sending unit 220 is specifically configured to transmit the data packet by using the local routing link when the received data packet carries the communication identifier.

As shown in fig. 7, this embodiment further provides a local routing processing apparatus, applied in a gateway or a base station, including:

a third receiving unit 310, configured to receive a data packet sent by a source UE;

a first extracting unit 320, configured to extract a local routing label from the data packet;

and a third sending unit 330, configured to transmit, by using the local routing link, a data packet exchanged between the two communication parties when the local routing tag is extracted.

The third receiving unit 310 and the third transmitting unit 330 both correspond to a communication interface and can transmit and receive data. The first extraction unit 320 may correspond to the aforementioned processor or processing circuit. In this embodiment, the local routing label may be added by the source UE based on the first type of local routing instruction or the second type of local routing instruction sent by the MME.

As shown in fig. 8, the present embodiment provides a local routing processing apparatus, applied in a UE, including:

a fourth receiving unit 410, configured to receive a local routing instruction from the MME

A second extracting unit 420, configured to extract, from the local routing instruction, a communication identifier of the target UE;

a generating unit 430, configured to generate a local routing label when sending a data packet to the target UE;

a fourth sending unit 440, configured to send a data packet carrying the local routing tag; the local routing label is used for triggering a network to transmit a data packet carrying the local routing label by using a local routing link.

The fourth receiving unit 410 and the fourth transmitting unit 340 both correspond to a communication interface, and are capable of transmitting and receiving data. The second extraction unit 420 and the generation unit 430 may correspond to the aforementioned processor or processing circuit

Several specific examples are provided below in connection with the above embodiments:

the first example is as follows:

in the prior art, a link for data packets between two communication parties generally includes: source UE (oee) → source base station (oeNB) → core network (EPC) → target base station (teNB) → target UE (tUE), and in case oeNB and teNB are the same base station, the user plane may be bypassed in this example as oee → eNB → tUE; in case the source gateway (oS-GW) and the target gateway (tS-GW) are the same gateway, this example bypasses the user plane to oeue → oeNB → S-GW → teNB → tUE.

In this embodiment, the oeNB is a base station to which the oeue is connected; the teNB is a base station connected with the tUE. The Os-GW is a gateway where the oUE is located; and the tS-GW is a gateway where the tUE is located. The data packets are transmitted by utilizing the link UE → eNB → tUE and/or utilizing oUE → oeNB → S-GW → teNB → tUE, namely, the data packets of both communication parties are transmitted by utilizing the local routing link.

In the technique shown in the left sub-diagram of fig. 9, data interaction between the ue and the tUE needs to pass through the EPC regardless of the user plane or the control plane, and after the local routing is adopted, at least data packets of the user planes of the ue and the tUE may not pass through the EPC.

Fig. 9 also includes a Radio Access Network (RAN), which shows that in the embodiment of the present invention, data interaction is performed by using a local routing link, and it can be considered that data packet interaction between two communicating parties is performed by using only the RAN without using the EPC.

Example two:

as shown in fig. 10, the present example provides an information interaction method including:

UE initiates a service request;

establishing a bearer and determining whether local routing is supported; whether the local routing is supported or not is determined, whether an MME such as an MME or a tmmme can obtain a communication identifier of the tUE, for example, a mobile phone number; thus, the identification information of the teNB or tS-GW to which the tUE is connected is obtained, and whether the local routing condition is met or not can be conveniently determined subsequently.

And if the local routing is determined to be supported, further determining whether the local routing condition is met.

And if the local routing condition is met, executing the local routing.

Example three:

as shown in fig. 11, the present example provides an information interaction method, including:

step 1: the oUE sends a service request; the service request carries a te ue phone number, which may specifically include: service request and establishment of bearer: the method comprises the steps that the oUE initiates a service request, a service identifier id and a telephone number of the tUE are attached, the oMME establishes a special bearer after receiving the service request, sends an addressing request attached with the telephone number of the tUE to a local Home Subscriber Server (HSS), and the HSS feeds back a tMME address where the tUE resides.

And 2, step: the mme determines whether the service request supports a Local Switch (LS) decision: the mme determines whether the service supports LS. And if so, sending the LS detection message to the tMME with oS-GW TEID, oeNB TEID and oUE id. the tMME determines whether the TEID of the tS-GW and the TEID of the teNB are the same as the oS-GWTEID and the oeNBEID in the LS probe message. The eNB level LS is determined as long as the TEIDs of oeNB and teNB are the same. the tme sends signaling 'perform eNB level LS' to the ome, accompanied by the oeNB TEID, oee id, tUE id.

And step 3: the mme notifies the oeenb to execute the eNB-level LS command, with an oeue id and a tUE id, which may specifically include: the MME sends an LS command to the eNB: and informing the eNB of two UE ids, and configuring the two UEs as an LS pair. And then, after receiving the data packet with the LS identification from the UE, the eNB searches a pairing table and directly forwards the data packet to the paired UE.

And 4, step 4: the mme notifying the oeue to execute the eNB-level LS command with the service id and the tUE id may specifically include: and sending an LS command to the oUE to inform the UE of eNB level LS, wherein the LS comprises a service id and a tUE id, and only the tUE id can be included.

And 5: and the tMME informs the tUE to execute an eNB level LS command to the tUE and informs the UE of the eNB level LS, including the service id and the oUE id. The eNB level LS command is to forward a packet using the base station as the predetermined communication device. The LS command is one of the first type of native routing instruction and/or the second type of native routing instruction.

Step 6: the UE sends data packets, wherein the LS flag bit of the PDCP packet of the data packet sent to the tUE by the oUE is set to be '1', and the LS flag bit of the PDCP packet of the data packet sent to the oUE by the tUE is set to be '1'. The LS flag bit is one of the aforementioned local routing tags.

And 7: and the eNB executes eNB level LS, pairs the oUE and the tUE, and forwards the LS flag bit of the PDCP packet received from the oUE or the tUE to the tUE or the oUE to realize the localswitch forwarding of the data packet.

And 8: tUE sends data packet; the specific process is the same as step 6.

Example four:

as shown in fig. 12, the information interaction method provided in this example is different from that in fig. 9 in that an mme not only makes an LS decision, but also receives an LS probe message from a tme by sending an LS request message to the tme, where the LS probe message carries tS-GW TEID, teNB TEID, and tUE id. Additional steps may refer to fig. 9 and/or example three. In the information interaction method provided in this example, the ue and the te ue are in the same eNB, that is, the eNB and the teNB are the same.

Example five:

as shown in fig. 13, the present example provides an information interaction method, including:

step 11: the oUE initiates a service request and attaches the telephone number of the tUE, the oMME establishes a special bearer after receiving the service request, sends an addressing request to attach the telephone number of the tUE to the HSS, and the HSS feeds back the tMME address where the tUE resides.

Step 12: the mme performs LS decision: the mme determines whether the service supports LS decision. And if so, sending the LS detection message to the tMME with oS-GW TEID, oeNB TEID and oUE id. the tMME determines whether the TEID of the tS-GW and the TEID of the teNB are the same as the TEID of the oS-GW and the TEID of the oeNB in the LS detection message. And if the TEIDs of the oeNB and the teNB are different, but the TEIDs of the oS-GW and the tS-GW are the same, determining that the S-GW level LS is obtained.

Step 13: and the tMME informs the oMME of executing the LS command of S-GW level, and attaches S-GWTEID, oeNBid, oUEid, tUEid and teNB id.

Step 14: the oMME informs the S-GW to execute S-GW level LS commands.

Step 15: the oMME informs the oeNB to execute an S-GW level LS command, wherein the command also comprises a teNB TEID and an oUE id.

Step 16: the tmes informs the teNB to execute an S-GW level LS command, which contains the oeNB TEID, the tUE id.

And step 17: and the oMME informs the oUE to execute an S-GW level LS command and informs the UE of being the S-GW level LS, and the UE comprises the service id and the tUE id. A

Step 18: tMME informs tUE to execute S-GW level LS commands, which contain oeNB TEID, tUE id.

Step 19: data sent by the oUE to the tUE is set to '1' at the LS flag bit of the PDCP packet.

Step 20: the eNB executes the S-GW level LS command: the LS flag bit in the PDCP packet received from the oUE is '1', namely the destination address of the GTP-U data packet is filled with the tenB TEID.

Step 21: and the S-GW executes the LS command of the S-GW level, receives the GTP-U data packet and forwards the GTP-U data packet according to the destination address.

Furthermore, the tUE sends data packets to synchronize steps 19, 20 and 21.

The information interaction method provided by the above example has the following characteristics: first, for the inter-UE direct traffic in the same eNB or the same S-GW, the traffic may be directly forwarded in the EPS without passing through a Public Data Network (PDN), so as to save resources. Secondly, the influence on the UE is small, and only the UE needs to add an identifier on the service needing the LS.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all the functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media capable of storing program codes, such as a removable Memory device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A local routing processing method is applied to a gateway or a base station, and comprises the following steps:

receiving a local routing instruction from a mobility management entity;

receiving a Packet Data Convergence Protocol (PDCP) packet sent by source User Equipment (UE);

extracting a local routing tag from the PDCP packet;

when the local routing label is extracted and the local routing is determined to be executed through the communication identifier, transmitting the PDCP packets interacted between the two communication parties by using the corresponding local routing link; wherein the content of the first and second substances,

the local route label represents one of four local routes:

a gateway-level local route for a single gateway;

gateway-level local routing for dual gateways;

base station level local routing for a single base station;

base station level local routing of dual base stations.

2. The method of claim 1, wherein the transmitting the PDCP packets exchanged between two communicating parties by using the corresponding local routing links comprises:

3. The method of claim 1, wherein the transmitting the PDCP packets exchanged between two communicating parties by using the corresponding local routing links comprises:

4. The method as claimed in claim 1, wherein the transmitting PDCP packets interacted between two communicating parties by using the corresponding local routing link comprises:

5. The method of claim 1, wherein the transmitting the PDCP packets exchanged between two communicating parties by using the corresponding local routing links comprises:

6. A local routing processing method applied to a UE (user equipment) is characterized by comprising the following steps:

receiving a local routing instruction from a mobility management entity;

extracting a communication identification of a target UE from the local routing instruction;

when a data packet is sent to the target UE, setting a local routing label in a PDCP packet;

sending the PDCP packet carrying the local routing label; the local routing tag is configured to trigger a network to transmit, by using a corresponding local routing link, a PDCP packet carrying the local routing tag, where the local routing tag indicates one of the following four local routes:

a gateway-level local route for a single gateway;

gateway-level local routing for dual gateways;

base station level local routing for a single base station;

base station level local routing of dual base stations.

7. The method of claim 6,

or when the received local routing instruction is a local routing instruction of the dual gateway, the local routing label represents a gateway-level local route of the dual gateway;

8. A local routing processing device, applied in a gateway or a base station, includes:

a third receiving unit, configured to receive a local routing instruction from the mobility management entity, and receive a PDCP packet sent by the source UE;

a first extracting unit, configured to extract communication identifiers of both communication parties from the local routing instruction, store the extracted communication identifiers, and extract a local routing tag from the PDCP packet;

a third sending unit, configured to transmit a PDCP packet exchanged between two communication parties by using a corresponding local routing link when the local routing tag is extracted and the local routing is determined to be executed by using the communication identifier; wherein the content of the first and second substances,

the local route label represents one of four local routes:

a gateway-level local route for a single gateway;

gateway-level local routing for dual gateways;

base station level local routing for a single base station;

base station level local routing of dual base stations.

9. A local routing processing device applied in a UE (user equipment) comprises:

a fourth receiving unit, configured to receive a local routing instruction from the mobility management entity;

a second extracting unit, configured to extract a communication identifier of the target UE from the local routing instruction;

a generating unit, configured to set a local routing tag in a PDCP packet when sending a data packet to the target UE;

a fourth sending unit, configured to send a PDCP packet carrying the local routing tag; the local routing tag is configured to trigger a network to transmit, by using a corresponding local routing link, a PDCP packet carrying the local routing tag, where the local routing tag indicates one of the following four local routes:

a gateway-level local route for a single gateway;

gateway-level local routing for dual gateways;

base station level local routing for a single base station;

base station level local routing of dual base stations.

10. A storage medium having stored thereon a computer program for performing the steps of the method of any one of claims 1 to 5, or for performing the steps of the method of claim 6 or 7, when the computer program is executed by a processor.