WO2015070442A1

WO2015070442A1 - Service offloading method, control network element, gateway router, and user plane entity

Info

Publication number: WO2015070442A1
Application number: PCT/CN2013/087254
Authority: WO
Inventors: 彭程晖; 倪锐; 王丙福
Original assignee: 华为技术有限公司
Priority date: 2013-11-15
Filing date: 2013-11-15
Publication date: 2015-05-21
Also published as: CN105284150A; CN105284150B

Abstract

Provided are a service offloading method, a control network element, a gateway router and a user plane entity. The method comprises: obtaining, by a control network element, information about the whole network by summarizing received traffic load information, and/or quality of service information sent by a user plane entity of each standard network and a routing flow table acquired from a gateway router, and determining whether it is necessary to perform service offloading on some UE according to the information about the whole network. During the service offloading process, judgement and scheduling on service offloading are performed by an independent control network element, reducing the load of an eNB and improving the applicability and extensibility of service offloading technology. In addition, since the control network element performs judgement and scheduling on service offloading according to the information about the whole network, not only the offloading among RRUs of different standard networks but also the service offloading among RRUs of the same standard network are achieved.

Description

Service offloading method, control network element, gateway router and user plane entity

The embodiments of the present invention relate to the field of communications, and in particular, to a service offloading method, a control network element, a gateway router, and a user plane entity.

Background technique

With the continuous development of technology, more and more user equipment (User Equipment, UE) in the wireless cellular communication system integrates a wireless Fidelity (WiFi) communication module. By combining wireless cellular technology with WiFi technology, a Wireless Local Access Network (WLAN) consisting of WiFi is used to offload traffic in a wireless cellular communication system to enhance the user experience.

In the prior art, WLAN is generally regarded as a dependency and supplement of a wireless cellular network, and an access point (AP) in a WLAN network is passed through a GPRS Tunneling Protocol (GTP) or a Mobile IP (Mobile IP, The MIP protocol is connected to the evolved Node B (eNodeB, eNB) in the wireless cellular network, and the eNB manages each AP to implement the offloading of the cellular network service by the WLAN network. Specifically, after receiving the offloading control information sent by the UE, the eNB establishes a correspondence between the WLAN identity and all the bearer channels of the UE according to the cellular network identifier and the WLAN identity of the user equipment, and according to the corresponding relationship and the data offloading manner. , determine the bearer channel corresponding to all and part of the user data stream.

However, with the rapid spread of WiFi, the number of APs in the future communication system architecture may greatly exceed the number of eNBs. If eNBs continue to be connected and managed by eNBs and manage dozens or even hundreds of APs, the eNBs may be overwhelmed and easily caused. The bottleneck limits the scope and scalability of business offloading technology to a large extent. Summary of the invention

The embodiments of the present invention provide a service offloading method, a control network element, a gateway router, and a user plane entity, and perform service splitting decision and scheduling through independent control network elements, thereby reducing the load of the eNB and improving the application range of the service offloading technology. Scalability. In a first aspect, the embodiment of the present invention provides a service offloading method, including: controlling, by a network element, monitoring information sent by each user plane entity, where the monitoring information includes: traffic load information, and/or service quality information, where The traffic load information is traffic load information of the radio remote unit RRU of each user plane entity, and the service quality information is service quality information of the user equipment UE served by the RRU;

The control network element obtains a routing flow table, and the routing flow table is stored in the gateway router GR. The control network element determines, according to the monitoring information and the routing flow table, whether to perform service offloading for the UE.

In a first possible implementation manner of the first aspect, the control network element, before determining whether the service needs to be offloaded for the UE, according to the monitoring information and the routing flow table, includes:

The control network element receives a service offloading request sent by a part of the user plane entities in each user plane entity;

The control network element determines, according to the monitoring information and the routing flow table, whether to perform service offloading for the UE, including:

The control network element performs traffic diversion according to the monitoring information and the routing flow table, whether it is necessary to provide services for the UE that is served by the RRU of the user plane entity that initiates the service offloading request.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the control network element is configured according to the monitoring information and the routing flow table. After determining whether the service needs to be offloaded for the UE, the method further includes:

If it is determined that traffic diversion needs to be performed for the UE, the control network element sends a configuration instruction to the GR to update the routing flow table.

With reference to the first aspect, the first or the second possible implementation of the first aspect, in a third possible implementation manner of the first aspect, the user plane entity includes: at least one evolved type User plane entity of the Node B eNB, and user plane entity of at least one access point AP.

In a second aspect, an embodiment of the present invention provides a service offloading method, including:

The user plane entity monitors the radio remote unit RRUs of the subordinates, and/or the user equipment UEs served by the RRUs to obtain monitoring information, where the monitoring information includes: traffic load information, and/or service quality Information, wherein the traffic load information is the RRU Traffic load information, the quality of service information is quality of service information by the UE; the user plane entity sends the monitoring information to a control network element, so that the control network element according to the monitoring information and the routing flow table It is determined whether a service offloading needs to be performed for the UE.

In a first possible implementation manner of the second aspect, the user plane entity monitors the radio frequency remote unit RRUs of the subordinates to obtain monitoring information, including:

Determining, by the user plane entity, whether data traffic flowing through each RRU exceeds a preset value, where the traffic data includes uplink data traffic, and/or downlink data traffic;

If the user plane entity exceeds, the user plane entity selects an alternative RRU and a service cooperation transmission manner for the UE with low quality of service according to the quality of service, where the service cooperation transmission manner includes: switching the low quality of service UE to the Alternatively, the RRU may be switched, or part of the service of the low quality of service UE may be switched to the replaceable RRU.

In a second possible implementation manner of the second aspect, the user plane entity monitors the user equipment UE that is served by each of the RRUs to obtain monitoring information, including:

Determining, by the user plane entity, whether the quality of service of the UE is lower than a preset value;

If the quality of service is lower than the preset value, the user plane entity selects an alternative RRU and a service cooperation transmission mode for the UE with low quality of service, where the service cooperation transmission manner includes: The UE switches to the replaceable RRU, or switches part of the service of the low quality of service UE to the replaceable RRU.

With reference to the first or second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the user plane entity is in the sub-radian remote radio unit RRU, and Or, after the user equipment UE that is served by each of the RRUs is configured to obtain the monitoring information, and before sending the monitoring information to the control network element, the method further includes:

The user plane entity sends a service offloading request to the control network element, where the service offloading request carries at least one of the following information: the identifier of the low quality of service UE, and the service of the low quality of service UE And an identifier of the RRU in which the data traffic exceeds a preset value, an identifier of the replaceable RRU, and an identifier of the service cooperation transmission manner.

With reference to the first or second possible implementation of the second aspect, in a fourth possible implementation manner of the second aspect, the user plane entity selects an alternative RRU for the UE with low quality of service, including :

The user plane entity selects that the signal strength of the UE receiving the low quality of service is greater than or equal to The RRU at the current RRU and having a lower load than the current RRU is used as an alternative RRU.

In a third aspect, an embodiment of the present invention provides a service offloading method, including:

The gateway router receives the configuration command sent by the control network element, where the configuration command is that the control network determines that the user equipment UE needs to be diverted according to the monitoring information and the routing flow table;

The gateway router updates the routing flow table according to the configuration command.

In a first possible implementation manner of the third aspect, after the gateway router updates the routing flow table according to the configuration command, the method further includes:

The gateway router updates the forwarding table of the switch according to the updated routing flow table, and the switch is located on a forwarding path of the gateway router and the user plane entity.

In a fourth aspect, an embodiment of the present invention provides a control network element, including:

a receiving module, configured to receive monitoring information sent by each user plane entity, where the monitoring information includes: traffic load information, and/or service quality information, where the traffic load information is a radio frequency of each user plane entity And the traffic load information of the RRU of the remote unit, where the quality of service information is quality of service information of the user equipment UE served by the RRU;

An obtaining module, configured to obtain a routing flow table, where the routing flow table is saved in a gateway router GR;

And a determining module, configured to determine, according to the monitoring information received by the receiving module, the routing flow table obtained by the acquiring module, whether to perform service offloading for the UE.

In a first possible implementation manner of the fourth aspect, the receiving module is further configured to receive a service offloading request sent by a part of the user plane entities in each user plane entity;

The determining module is configured to perform service offloading according to the monitoring information and the routing flow table, whether it is required to provide a service for the UE that is served by the RRU of the user plane entity that initiates the service offloading request.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the control network element further includes:

And a sending module, configured to send a configuration instruction to the GR to update the routing flow table if the determining module determines that the service is to be offloaded for the UE.

With reference to the fourth aspect, the first or the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the user plane entity includes: A user plane entity of an evolved Node B eNB, and a user plane entity of at least one access point AP. In a fifth aspect, an embodiment of the present invention provides a user plane entity, including:

a monitoring module, configured for each of the subordinate remote radio units RRU, and/or by each of the

The user equipment UE that provides the service by the RRU performs monitoring to obtain monitoring information, where the monitoring information includes: traffic load information, and/or service quality information, where the traffic load information is traffic load information of the RRU, and the service is The quality information is quality of service information by the UE;

a sending module, configured to send, to the control network element, the monitoring information that is monitored by the monitoring module, so that the control network element determines, according to the monitoring information and the routing flow table, whether the

The UE performs traffic offloading.

In a first possible implementation manner of the fifth aspect, the monitoring module includes a determining unit and a selecting unit;

The determining unit is configured to determine whether data traffic flowing through each RRU exceeds a preset value, where the traffic data includes uplink data traffic, and/or downlink data traffic;

The selecting unit is configured to: if the determining unit determines that the data traffic exceeds the preset value, select an alternative RRU and a service cooperative transmission mode for the UE with low quality of service according to the quality of service, where the service is The cooperative transmission manner includes: switching the low quality of service UE to the replaceable RRU, or switching part of the low quality of service UE to the replaceable RRU.

In a second possible implementation manner of the fifth aspect, the monitoring module includes a determining unit and a selecting unit;

The determining unit is configured to determine whether the quality of service of the UE is lower than a preset value, and the selecting unit is configured to: if the determining unit determines that the quality of service is lower than the preset value, The quality of service UE selection may be substituted for the RRU and the service cooperative transmission mode, where the service cooperation transmission manner includes: switching the low quality of service UE to the replaceable RRU, or part of the low quality of service UE The service switches to the replaceable RRU.

With the first or second possible implementation of the fifth aspect, in a third possible implementation manner of the fifth aspect, the sending module is further configured to send a service traffic to the control network element. The request, the service offloading request carries at least one of the following information: the identifier of the low quality of service UE, the service identifier of the low quality of service UE, and the identifier of the RRU whose data traffic exceeds a preset value The identifier of the RRU, the service cooperation transmission mode Logo.

With reference to the first or second possible implementation manner of the fifth aspect, in a fourth possible implementation manner of the fifth aspect, the selecting unit is specifically configured to select to receive the UE with the low quality of service The RRU whose signal strength is greater than or equal to the current RRU and whose load is lower than the current RRU is taken as a substitute RRU.

In a sixth aspect, an embodiment of the present invention provides a gateway router, including:

a receiving module, configured to receive a configuration command sent by the control network element, where the configuration command is sent by the control network according to the monitoring information and the routing flow table after the service is diverted for the user equipment UE;

And a processing module, configured to update the routing flow table according to the configuration command received by the receiving module.

In a first possible implementation manner of the sixth aspect, the processing module is further configured to update a forwarding table of the switch according to the updated routing flow table, where the switch is located at the gateway router and the user plane entity On the forwarding path.

In a seventh aspect, the embodiment of the present invention provides a control network element, including:

a receiver, configured to receive monitoring information sent by each user plane entity, where the monitoring information includes: traffic load information, and/or service quality information, where the traffic load information is a radio frequency of each user plane entity And the traffic load information of the RRU of the remote unit, where the quality of service information is quality of service information of the user equipment UE served by the RRU;

a processor, configured to obtain a routing flow table, where the routing flow table is stored in the gateway router GR, and the processor is further configured to determine, according to the monitoring information and the routing flow table, whether the UE needs to be performed for the UE Business diversion.

In a first possible implementation manner of the seventh aspect, the receiver is further configured to receive a service offloading request sent by a part of the user plane entities in each user plane entity;

The processor is specifically configured to perform service offloading for the UE that provides the service by the RRU subordinate to the user plane entity that initiates the service offload request according to the monitoring information and the routing flow table.

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a second possible implementation manner of the seventh aspect, the control network element further includes:

a transmitter, configured to send to the GR if it is determined that traffic is to be offloaded for the UE A configuration instruction is sent to update the routing flow table.

With reference to the seventh aspect, the first or the second possible implementation manner of the seventh aspect, in a third possible implementation manner of the seventh aspect, the user plane entity includes: at least one evolved type User plane entity of the Node B eNB, and user plane entity of at least one access point AP.

In an eighth aspect, an embodiment of the present invention provides a user plane entity, including:

The processor is configured to monitor, by the user equipment UEs that are served by each of the RRUs, the monitoring information, and the monitoring information includes: traffic load information, and/or, The service quality information, where the traffic load information is traffic load information of the RRU, and the service quality information is service quality information by the UE;

The transmitter is configured to send the monitoring information to the control network element, so that the control network element determines, according to the monitoring information and the routing flow table, whether to perform traffic offloading for the UE.

In a first possible implementation manner of the eighth aspect, the processor is specifically configured to determine whether data traffic flowing through each RRU exceeds a preset value, where the traffic data includes uplink data traffic, and Or, the downlink data traffic; if yes, according to the quality of service, sequentially selecting an alternative RRU and a service cooperation transmission mode for the UE with low quality of service, the service cooperation transmission manner includes: switching the low quality of service UE to the The RRU may be replaced, or part of the service of the low quality of service UE may be switched to the replaceable RRU.

In a second possible implementation manner of the eighth aspect, the processor is specifically configured to determine whether the quality of service of the UE is lower than a preset value; if the quality of service is lower than the preset value, And selecting, for the UE with low quality of service, an alternative RRU and a service cooperation transmission manner, where the service cooperation transmission manner includes: switching the low quality of service UE to the replaceable RRU, or the low quality of service Part of the service of the UE is switched to the replaceable RRU.

In conjunction with the first or second possible implementation of the eighth aspect, in a third possible implementation manner of the eighth aspect, the transmitter is further configured to send a service traffic to the control network element. The request, the service offloading request carries at least one of the following information: the identifier of the low quality of service UE, the service identifier of the low quality of service UE, and the identifier of the RRU whose data traffic exceeds a preset value And the identifier of the RRU and the identifier of the service cooperation transmission manner.

With reference to the first or second possible implementation of the eighth aspect, in a fourth possible implementation manner of the eighth aspect, the processor is configured to select to receive the low quality of service UE The RRU whose signal strength is greater than or equal to the current RRU and whose load is lower than the current RRU is In order to replace the RRU.

A ninth aspect, the embodiment of the present invention provides a gateway router, including:

a receiver, configured to receive, by the control network, a configuration command sent by the control network element, where the configuration command is sent by the control network according to the monitoring information and the routing flow table after the service is diverted for the user equipment UE;

And a processor, configured to update the routing flow table according to the configuration command.

In a first possible implementation manner of the ninth aspect, the processor is further configured to update a forwarding table of the switch according to the updated routing flow table, where the switch is located at the gateway router and the user plane entity On the forwarding path.

The service offloading method, the control network element, the gateway router, and the user plane entity provided by the embodiment of the present invention, the control network element receives the traffic load information sent by the user plane entity of each standard network, and/or the service quality information and the slave gateway. The router obtains the routing flow table and obtains the information of the entire network. Based on the information of the entire network, it is determined whether the service is to be offloaded to certain UEs. In the service offloading process, the independent control network element performs the service offloading decision and scheduling, which reduces the load of the eNB and improves the applicable scope and scalability of the service offloading technology. In addition, since the control network element performs the service shunting decision and scheduling according to the whole network information, the shunting between the RRUs of different standard networks is realized, and the service shunting between the RRUs of the same type of network is also realized. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a flowchart of Embodiment 1 of a shunting method of the present invention

2 is a flowchart of Embodiment 2 of a method for offloading the present invention

3 is a flowchart of Embodiment 3 of the shunting method of the present invention

4 is a schematic diagram of a network architecture applicable to Embodiment 4 of the method for offloading according to the present invention; FIG. 5 is a signaling interaction diagram of Embodiment 4 of the method for offloading according to the present invention;

6 is a logic diagram of C-uNB and C-RRU in Embodiment 4 of the shunting method of the present invention. FIG. 7 is a logical structure of W-uNB and W-RRU in Embodiment 4 of the service offloading method according to the present invention. The logical structure of Single-cNB and SDN-GR in Embodiment 4 of the method for offloading the invention; 9A is a flowchart of determining, by a user plane entity according to a service quality information of a subordinate UE, whether to perform service offloading to a UE according to a fourth embodiment of the service offloading method of the present invention;

FIG. 9B is a flowchart of determining, according to the traffic load information of the subordinate RRU, whether the user plane entity needs to perform service offloading to the UE according to the fourth embodiment of the service offloading method of the present invention;

Figure

16 is a schematic structural diagram of Embodiment 4 of a control network element according to the present invention;

17 is a schematic structural diagram of Embodiment 3 of a user plane entity according to the present invention;

FIG. 18 is a schematic structural diagram of Embodiment 2 of a gateway router according to the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

1 is a flowchart of Embodiment 1 of a service offloading method according to the present invention. The executive body of this embodiment is a control network element, which is applicable to networks in different networking modes in a networking mode, and requires an independent control network to perform traffic shunting decisions on the service. Scheduling scenarios. Specifically, the embodiment includes the following steps: 101. The control network element receives the monitoring information sent by each user plane entity, where the monitoring information includes: traffic load information, and/or service quality information, where the traffic load information is used by each user plane. The traffic load information of the radio remote unit RRU of the entity, and the quality of service information is the quality of service information of the user equipment UE served by the RRU.

In general, the wireless interface protocol stack can be divided into a user plane (U-plane) and a control plane (C-plane). For each type of network, the user plane is controlled by the control plane, the control plane and the user plane. Mixed on the same network element entity, such as an evolved node mixed in an LTE network (eNodeB, eNB) or wireless access point (AP) on the wireless LAN. The control plane of each standard network in the wireless communication network is physically separated from the user, and two independent entities are separated, wherein the control plane independent entity can be represented, for example, as the control plane of the node B.

(Control-plane of Node B, cNB) entity, user plane independent entity, for example, may be represented as a User-plane of Node B (uNB) entity of Node B. In this embodiment, the cNB entities of the standard networks are combined to obtain a new control network element, which may be represented as a Single-cNB, and the control network element has the function of a Single Network Controller (SNC). The new control network element uniformly controls the user plane entity of each standard network in the wireless communication network, that is, the uNB entity.

In this step, the user plane entities of the various network standards of the wireless communication network monitor the traffic load information of the respective Radio Remote Units (RRUs) of the subordinates, or monitor the user equipments served by the respective subordinate RRUs ( The service quality information of the user equipment, the UE is reported to the control network element as the monitoring information periodically or in real time; correspondingly, the control network element receives the monitoring information sent by each user plane entity.

102. The control network element obtains a routing flow table, where the routing flow table is saved in the gateway router GR. In this embodiment, the gateway router (G) is, for example, a gateway router having a Software Defined Network (SDN) function, and can be represented as an SDN-GR, where a routing flow table that determines a service forwarding rule is stored ( Flowtable). The control network element periodically reads the routing flow table stored in the gateway router, and summarizes the read routing flow table and the monitoring information reported by the user plane entities of the various standard networks to obtain the entire network information.

103. The control network element determines, according to the monitoring information and the routing flow table, whether to perform traffic offloading for the UE.

The control network element determines whether it is necessary to perform service offloading for all or part of the UEs serving the RRUs of the user plane entities controlled by the control according to the aggregated network information. For example, if the quality of service of the UE served by the RRU is low, part or all of the service of the low quality of service UE may be switched to an RRU that belongs to the same type of user plane entity and has a lighter load; Alternatively, part or all of the service of the low quality of service UE is switched to an RRU that belongs to a different user plane entity of the RRU and is lighter in load.

Optionally, the control network element may only pay attention to the load status of the RRU, and determine the RRU with a heavy load according to the traffic load information of the RRUs of each user plane entity, and the RRU of the heavy load is mentioned. All or part of the service of the serving UE is switched to other lightly loaded RRUs.

Optionally, the control network element may also only pay attention to the quality of the UE, and determine the UE whose service quality is lower than the preset value according to the service quality of the UE served by the RRU subordinate to each user plane entity. Some or all of the services of the part of the low quality of service UE are switched to other RRUs that can provide high quality signals.

Optionally, the control network element may also take into account the load status of the RRU and the quality of service of the UE, determine the RRU with a heavy load according to the traffic load information of the RRU subordinate to each user plane entity, and determine according to the service quality of the UE. The low quality of service UE served by the heavily loaded RRU then switches some or all of the traffic of the portion of the low quality of service UE to other RRUs that provide high quality signals.

In the service offloading method provided by the embodiment of the present invention, the control network element aggregates the traffic load information sent by the user plane entity of each standard network, and/or the service quality information, and obtains the routing flow table from the gateway router to obtain the whole network information. Based on the information of the entire network, determine whether it is necessary to perform traffic offloading for certain UEs. In the service offloading process, the independent control network element performs the service offloading decision and scheduling, which reduces the load of the eNB and improves the applicable scope and scalability of the service offloading technology. In addition, since the control network element performs the service shunting decision and scheduling according to the whole network information, the shunting between the RRUs of different standard networks is realized, and the service shunting between the RRUs of the same type of network is also realized.

Further, in the first embodiment, the control network element may not perform service splitting and scheduling for the UEs in the entire network, but after receiving the service offloading request sent by some user plane entities in the user plane entity, The UE that provides the service by the RRU subordinate to the user plane entity that initiates the service offloading request performs service offloading.

Further, in the first embodiment, after determining that the service needs to be offloaded for the UE, the control network element sends a configuration instruction to the gateway router to update the routing flow table stored on the gateway router, so that the part of the UE that needs to be offloaded Or all services are switched to other RRUs. At this time, if there is one or more switches on the forwarding path between the gateway router and the user plane entity

( switch ) , the gateway router can update the forwarding table on each switch. The switch is, for example, a switch with a Software Defined Network (SDN) function, and can be represented as an SDN-Switch. In this way, the subsequent offloading services can be forwarded through the SDN technology, and the signaling overhead is high and the transmission is relatively high in connection with the establishment of the connection and the handover in the prior art. The GTP/MIP tunneling mechanism with limited real-time transmission uses SDN forwarding technology to reduce the delay and signaling overhead required for service forwarding.

2 is a flowchart of Embodiment 2 of the service offloading method of the present invention. The executor of this embodiment is a user plane entity, which is applicable to networks with different standards in the networking mode, and requires an independent control network to perform traffic shunting decisions on the service. Scheduling scenarios. Specifically, the embodiment includes the following steps:

201. The user plane entity monitors the radio remote unit RRU of the subordinate, and/or the user equipment UE served by each RRU, and the monitoring information includes: traffic load information, and/or service quality information. The traffic load information is traffic load information of the RRU, and the quality of service information is quality of service information of the UE.

For the description of the user plane entity, the control network element, the traffic load information, and the service quality information, refer to step 101 in Figure 1, and no further details are provided here.

Optionally, the user plane entity may mainly focus on the load status of the subordinate RRU, and determine whether the data traffic flowing through each RRU exceeds a preset value, where the traffic data includes uplink data traffic, and/or downlink data traffic; if exceeded, The user plane entity controls the traffic load information of all subordinate RRUs and the service quality information of the UE. Therefore, the user plane entity selects an alternative RRU and a service cooperative transmission manner for the UE with low quality of service according to the quality of service, and the service cooperation transmission manner includes: switching the UE with low quality of service to replace the RRU, or lowering the quality of service Part of the UE's service is switched to replace the RRU. The RRU can be replaced by, for example, an RRU whose signal strength is greater than or equal to the current RRU and whose load is lower than the current RRU.

Optionally, the user plane entity may also focus on the quality of the UE service quality, and determine whether the quality of service of the specific UE or the UE served by a specific RRU is lower than a preset value; if the quality of service is lower than a preset value The user plane entity selects an alternative RRU and a service cooperative transmission manner for the UE with low quality of service, and the service cooperation transmission manner includes: switching the low quality of service UE to the replaceable RRU, or part of the service of the low quality of service UE Switch to replace the RRU. The RRU may be replaced by, for example, an RRU whose signal strength is greater than or equal to the current RRU and whose load is lower than the current RRU.

202. The user plane entity sends the monitoring information to the control network element, so that the control network element determines, according to the monitoring information and the routing flow table, whether the service needs to be offloaded for the UE.

After obtaining the monitoring information, the user plane entity periodically sends the monitoring signal to the control network element. The information, so that the control network element determines whether it is necessary to perform traffic offloading for the UE according to the monitoring information and the routing flow table.

According to the service offloading method provided by the embodiment of the present invention, the user plane entity of each standard network sends traffic load information, and/or service quality information to the control network element, so that the control network element sends the received user plane entity of each standard network. The traffic load information, and/or the QoS information, and the routing flow table obtained from the gateway router are summarized to obtain the information of the entire network. According to the information of the entire network, it is determined whether the service is to be offloaded to certain UEs. In the service offloading process, the independent control network element performs the service offloading decision and scheduling, which reduces the load of the eNB and improves the applicable scope and scalability of the service offloading technology. In addition, since the control network element performs the service shunting decision and scheduling according to the whole network information, the shunting between the RRUs of different standard networks is realized, and the service shunting between the RRUs of the same type of network is also realized.

Further, in the second embodiment, after the user plane entity obtains the monitoring information, the user network entity may send a service offloading request to the control network element, so that the control network element performs the service offloading decision only for the UE under the user plane entity that initiates the service offloading request. The service offloading request carries at least one of the following information: an identifier of a UE with a low quality of service, a service identifier of a UE with a low quality of service, an identifier of an RRU whose data traffic exceeds a preset value, an identifier that can replace the RRU, and a service The identity of the collaborative delivery method.

3 is a flowchart of Embodiment 3 of the service offloading method of the present invention. The executive body of this embodiment is a gateway router, which is applicable to networks with different standards in the networking mode, and requires independent control networks to perform traffic shunting and scheduling for services. Scene. Specifically, the embodiment includes the following steps:

301. The gateway router receives the configuration command sent by the control network element, and the configuration command is that the control network determines, according to the monitoring information and the routing flow table, that the user equipment UE needs to be service-diverted and sent.

For the description of the user plane entity, the control network element, the traffic load information, and the service quality information, refer to step 101 in FIG. 1 , and details are not described herein again.

In this step, after determining that the service needs to be offloaded for the UE and reconfiguring the service forwarding path, the control network element sends a configuration instruction to the gateway router to update the routing flow table stored on the gateway router, so that the traffic needs to be offloaded. Some or all of the UE's services are switched to other RRUs. 302. The gateway router updates the routing flow table according to the configuration command.

In this step, the gateway router updates the service forwarding rule according to the configuration command, that is, updates the routing flow table.

In the service offloading method provided by the embodiment of the present invention, the gateway router receives the configuration command sent by the control network element after determining that the service needs to be offloaded for the UE, and updates the routing flow table according to the configuration command, so that the part of the UE that needs to be offloaded Or all services are switched to other RRUs. In the service offloading process, the independent control network element performs the service offloading decision and scheduling, which reduces the load of the eNB and improves the applicable scope and scalability of the service offloading technology. In addition, since the control network element performs the service shunting decision and scheduling according to the whole network information, the shunting between the RRUs of different standard networks is realized, and the service shunting between the RRUs of the same type of network is also realized.

Further, in the foregoing embodiment 3, if one or more switches exist on the forwarding path between the gateway router and the user plane entity, the gateway router may update the forwarding table on each switch. The switch is, for example, a switch with a Software Defined Network (SDN) function, which can be represented as an SDN-Switch. In this way, the subsequent offloading services can be forwarded by the SDN technology, and the SDN forwarding technology is adopted in comparison with the GTP/MIP tunneling mechanism in the prior art that establishes a connection and has a high signaling overhead and a real-time transmission limitation. It can reduce the delay and signaling overhead required in service forwarding.

The above-mentioned FIG. 1, FIG. 2 and FIG. 3 respectively illustrate the present invention from the perspectives of the control network element, the user plane entity and the gateway as the execution subject. The following is the user plane of the LTE system network user plane entity and the WiFi system network in the communication network. The invention is described in detail by way of examples. In this embodiment, the control planes that are originally located on the eNodeB network element of the LTE network are independently C-cNB entities, and the user planes are independently C-uNB entities; the APs of the WiFi network are added to the radio resource control of the LTE network ( Radio Resource Control (RRC) function, which combines this new function with some existing control functions of the Media Access Control (MAC) layer to obtain a new control plane entity W-cNB, and the remaining AP As a separate user plane entity W-uNB entity, the C-cNB entity is merged with the W-cNB entity and has the SNC network element function ^ to obtain the control network element Single-cNB of this embodiment. The monitoring information sent by the C-uNB or the W-uNB is received by the Single-cNB, and the routing flow table is read from the SDN-GR having the SDN function, and the monitoring information and the routing flow table are summarized into the entire network information, and then it is determined whether The UE performs traffic offloading. Hereinafter, the present invention will be described in detail with reference to Figs. 4, 5, 6, 7, and 8. 4 is a schematic diagram of a network architecture applicable to Embodiment 4 of the service offloading method of the present invention; FIG. 5 is a signaling interaction diagram of Embodiment 4 of the service offloading method of the present invention; FIG. 6 is a C-FIG. FIG. 7 is a logical structural diagram of a W-uNB and a W-RRU in the fourth embodiment of the service offloading method according to the present invention; FIG. 8 is a schematic diagram of a single-cNB in the fourth embodiment of the service offloading method according to the present invention; Logic structure diagram of SDN-GR.

Referring to FIG. 4, the gateway router SDN-GR is an SDN-enabled gateway router, which is connected to a Public Data Network (PDN) or the Internet (Internet), and is respectively connected to the user plane entity C-uNB of the eNodeB and The user plane entity of the AP is W-uNB, and there is an SDN-Switch between the SDN-GR and the C-uNB or W-uNB. The C-uNB is connected to one or more cellular standard Cellular-Radio Remote Units (C-RRUs) via optical fibers, coaxial cables, twisted pairs, and microwave links. The W-uNB is also connected to one or more WiFi-based Radio Remote Units (W-RRUs) via optical fibers, coaxial cables, twisted pairs, and microwave links. The control network element Single-cNB is connected to the C-RRU, W-RRU and SDN-GR respectively, as shown by the dotted line in the figure. Each C-uNB or W-uNB provides service to one or more UEs, each UE may be connected to the C-RRU through a cellular link, or connected to the W-RRU through a wireless local area network link (WLAN Link) In addition, one UE can simultaneously access the C-RRU and the W-RRU.

Referring to FIG. 5, the embodiment includes the following steps:

401. The user plane entity monitors each of the subordinate remote radio unit RRUs, and/or the user equipment UE served by each RRU monitors and obtains monitoring information.

Specifically, this step includes the following steps:

4011. The C-uNB monitors traffic load information of the subordinate C-RRU and the quality of service information of the UE served by the C-RRU.

Referring to FIG. 6, the C-uNB includes a monitor module, an IP interface module, an SDN flow table module, a Packet Data Convergence Protocol (PDCP) module, and a wireless chain. Radio Link Control (RLC) module, Media Access Control (MAC) module. The Monitor module is connected to the MAC module, and the Control Path is established between the IP Interface module and the Single-eNB, and a Data Path is established between the SDN and the GW. The C-RRU includes a Thin-MAC module and a Physical (PHY) module. It should be noted that only part of the logical structure of the C-uNB and the C-RRU is illustrated in FIG. 5 above, and is not a complete C-uNB and C-RRU.

In this step, the IP interface module sends the uplink data of the C-RRU to the SDN-GW through the data path, or receives the downlink data of the C-RRU by using the data path, and the C-uNB monitors the traffic of the data path by using the Monitor module. Load information. At the same time, the Monitor module also monitors the quality of service information of the UE that is counted and recorded by the MAC module, such as throughput, delay, jitter, cache queue length, and so on.

4012. The W-uNB monitors the traffic load information of the subordinate W-RRU and the quality of service information of the UE served by the W-RRU.

Referring to FIG. 7, the W-uNB includes a monitor module, an IP interface module, an SDN flow table module, and a radio link control (MAC) module. The Monitor module is connected to the MAC module, and the Control Path is established between the IP Interface module and the Single-eNB to establish a Data Path with the SDN-GW. The C-RRU includes a Thin-MAC module and a Physical (PHY) module.

It should be noted that only the partial logical structures of the W-uNB and the W-RRU are illustrated in FIG. 7 above, and are not complete W-uNB and W-RRU.

In this step, the IP interface module sends the uplink data of the W-RRU to the SDN-GW through the data path, or receives the downlink data of the W-RRU by the SDN-GW through the data path, and the W-uNB monitors the traffic of the data path by using the Monitor module. Load information. At the same time, the Monitor module also monitors the quality of service information of the UE that is counted and recorded by the MAC module, such as throughput, delay, jitter, cache queue length, and so on.

In addition, it should be noted that, as shown in FIG. 6 and FIG. 7 above, the difference between C-uNB and W-uNB is that there is no PDCP module and RLC module in W-uNB. However, the difference between the C-uNB representing the wireless cellular system and the W-uNB representing the WiFi system is not limited thereto, and only the modules related to the present invention are shown in Figs. 6 and 7.

402. The user plane entity reports the monitoring information to the Single-cNB.

Specifically, this step includes the following steps:

4041. The C-uNB reports the monitoring information to the Single-cNB.

C-uNB periodically uses the IP Interface module to monitor the information obtained by the Monitor module. The control path is reported to the Single-cNB, and the periodic interval for reporting the monitoring information can be remotely configured by the Single-cNB.

4022. The W-uNB reports the monitoring information to the Single-cNB.

The W-uNB uses the IP Interface module to periodically report the information monitored by the Monitor module to the Single-cNB through the control path. The periodic interval for reporting the monitoring information can be remotely configured by the Single-cNB.

403. Single-cNB reads the routing flow table from the SDN-GR.

The Single-cNB periodically reads the routing flow table stored in the SDN-GR, and summarizes the routing flow table and the monitoring information reported by the C-uNB/W-uNB to obtain the entire network information.

Please refer to Figure 8. Single-cNB includes network information database (Network Information

Database) module, algorithm module, communication protocol module, software module, memory module and interface module, the software modules are respectively connected with other modules. The SDN-GR includes an SDN routing flow table module for managing a routing flow table representing service forwarding rules, including multiple interface (IF, IF) modules. In this step, the Single-cNB periodically reads the routing flow table of the SDN-GW through the Interface module under the control of the software module, and the monitored routing flow table and the monitoring information reported by the C-uNB/W-uNB are reported. The summary information is stored in the network information database module.

404. The user plane entity determines whether the service of the subordinate UE needs to be offloaded.

The user plane entity grasps the traffic load information of all the subordinate RRUs and the service quality information of the UE. Therefore, the user plane entity can conveniently determine which RRUs belong to the heavy load RRU, which are the light load RRUs, and which UEs have low service quality. Which UEs have high quality of service. Specifically, this step includes the following steps:

4041. The C-uNB determines whether it is required to perform traffic offloading to the subordinate UEs.

Based on real-time monitoring, the C-uNB's Monitor module determines whether it needs to offload the subordinate UEs. For example, if the current load of C-RRU1 is higher than a certain threshold and the current load of C-RRU-2 is very light, C-uNB will select from the UEs served by C-RRU1 to be able to be C-RRU2. The UE providing the coverage and the service constitutes the candidate set A, and performs a load balancing algorithm to determine which UEs need to be coordinated by the C-RRU2 for service cooperation. The specific manner of the service cooperation transmission includes, but is not limited to: directly switching the UE to the C-RRU 2, and the C-RRU2 separately provides the UE with the subsequent service; or, switching part of the service of the UE to the C-RRU2, by the C- RRU1禾P C-RRU2 Together provide the UE with follow-up services.

4042. The W-uNB determines whether it is required to perform traffic offloading to the subordinate UE.

For details, refer to step 4041 above, and the steps are described here.

In this step, after the candidate set A is determined, the load balancing algorithm is continuously executed in combination with the service cooperative transmission mode, and load balancing is performed between the subordinate C-RRUs, and the C-RRUs served by the heavy load are served. The traffic balancing algorithm may be selected as follows: In this step, the load balancing algorithm is as follows:

Algorithm input:

Alternative set A, denoted by ), m=l, 2,...,M;

The current traffic load of the subordinate RRU is recorded as n=l, 2,...,N;

Threshold threshold for traffic load, recorded as

Algorithm output:

The business cooperation delivery method is written as k=l,2,..., K t =< ue _ id, strategy, rru _ old, rru _ new > , e Γ. Where t is a quad vector of the business collaboration delivery method. Where ue_id represents the identifier of the UE, strategy represents the policy to assist the transmission, rru_old represents the current RRU, and rru_new represents the RRU providing assistance. Algorithm code:

Initialization: Set k = 1

For m = 1 to M

Set old_n = S(m,l), new_n = S(m,2)

If L(new_n) < " and L(old_n) > L(new_n)

Strategy = handover; II is completely served by the new RRU for the UE else if L(new_n) < " and L(old_n) < L(new_n)

Strategy = cooperative; II from the old and new RRU - for the UE

Strategy = nothing; // keep the UE status unchanged, do not execute any end

Ue_id = m;

Rru_old = old_n;

Rru_new = new_n;

T(k) = <ue_id, strategy, rru_old, rru_new>;

k = k + 1 End

It should be noted that the foregoing load balancing algorithm is only an optional implementation manner of the present invention. In other possible implementation manners, other algorithms may also be used.

In this step, the user plane entity determines whether it is necessary to perform traffic offloading to some or some UEs according to the traffic load information of the subordinate RRU and the service quality information of the UE. The detailed description can be seen in FIG. 9A and FIG. 9B.

405. The user plane entity sends a service offload request to the Single-cNB.

If the user plane entity determines that the subordinate UE needs to be offloaded, it sends a service offload request to the Single-cNB; otherwise, the load balancing algorithm is continued.

Specifically, this step includes the following optional sub-steps:

4051. The C-uNB sends a service offload request to the Single-cNB.

4052. The W-uNB sends a service offload request to the Single-cNB.

406. The Single-cNB determines whether the service can be offloaded to the UE according to the information of the entire network. The single-cNB can determine whether it needs to perform traffic offloading for one or some UEs in the entire network according to the information of the entire network, or can also initiate the service request to the user after receiving the service offloading request sent by the user plane entity. The UE subordinate to the entity performs offloading.

It should be noted that, the foregoing steps 404 and 405 are optional steps. If the single-cNB receives the service offloading request sent by the user plane entity, it is generally only used for offloading the UE subordinate to the user plane entity that initiates the service offloading request. Otherwise, The Single-cNB performs service offloading for UEs in the entire network according to the information of the entire network.

Specifically, in this step, if the Single-cNB receives the service offloading request sent by the user plane entity, the received candidate set A carried by each service offloading request is aggregated to obtain the preprocessing set B, according to the network information database. The network-wide information in the module determines whether it is possible to perform RRU switching in the same standard for some or some UEs. Alternatively, all or part of services of one or some UEs are switched across RRUs. Finally, the UEs that can perform the same-type RRU handover or the different-standard RRUs can be aggregated to obtain the service offload processing set C.

Optionally, after the pre-processing set B is summarized, the Single-cNB combines the complete information, and the following shunt algorithm may be used to determine whether the shunt processing set C can be obtained for one or some services.

Algorithm input:

The traffic load of the network-wide C-RRU is recorded as CL(n), n = 1, 2, ..., N1; The traffic load of the W-RRU in the whole network is recorded as WL(n), n = 1, 2, ..., N2;

Preprocessing set B, denoted as R(m), m=l, 2, ..., M.

Algorithm output:

Business offload processing set C, denoted as G(x), x=l, 2,..., X

Algorithm steps:

Initialization: Set x = 1

For m = 1 to M

If R(m).rru_new is a C-RRU_ID, then try to find a W-RRU, which could cover this R(m).ue_id and has the lowest traffic load in WL(n).

If a new W-RRU could be found

Set G(x).rru_new = W-RRU_ID

Else

Set G(x).rru_new = C-RRU_ID

End

Else II R(m).rru_new is a W-RRU_ID

Try to find another C-RRU, which could also cover this R(m).ue_id and has a lower traffic load than the R(m).rru_new.

If a new C-RRU could be found II maybe belong to another

C-uNB

Set G(x).rru_new = new found C-RRU_ID

Else

Set G(x).rru_new = R(m).rru_ne

End

G(x).ue_id = R(m).ue_id;

G(x).rru_old = R(m).rru_old;

G(x). strategy = R(m). strategy

If strategy = handover

G(x). old—path = 0;

G(x). new—path = 100%

Else II strategy = cooperative

G(x). old—path = L(rru_old) I (L(rru_old)+L(rru_new)) II Here, L = CL[jWL

G(x). old—path = L(rru_new) I (L(rru_old)+L(rru_new)) end

x = x + 1

End

It should be noted that the above-mentioned shunting algorithm is only an optional implementation manner of the present invention. In other possible implementation manners, other algorithms may also be used.

407. The Single-cNB sends a configuration command to the SDN-GR.

After the Single-cNB determines that the UE can be offloaded, that is, when the service offloading process is set C Non-empty, sends configuration commands to the SDN-GR to update the routing flow table.

408. The SDN-GR performs IP forwarding according to the updated routing flow table.

In this step, if one or more SDN-Switches (not shown) exist on the forwarding path between the SDN-GR and the user plane entity, the SDN-GR load updates the SDN-Switch forwarding along the way.

Specifically, the IF module of the SDN-GR performs IP forwarding according to the routing flow table. If one or more SDN-Switches exist on the IP path of the SDN-GR and the C-uNB/W-uNB, they are based on

The information provided by the routing flow table of SDN-GR modifies its own forwarding table step by step. In this way, the subsequent offloading services can be forwarded by the SDN technology, and the SDN forwarding technology is adopted in comparison with the GTP/MIP tunneling mechanism in the prior art that establishes a connection and has a high signaling overhead and a real-time transmission limitation. It can reduce the delay and signaling overhead required in service forwarding.

In the following, in step 404, the user plane entity determines whether to perform service offloading to a certain UE or some UEs according to the traffic load information of the subordinate RRU and the service quality information of the UE. Specifically, please refer to Figure 9A and Figure 9B. FIG. 9A is a flowchart of determining, by the user plane entity according to the service quality information of the subordinate UE, whether to need to perform service offloading to the UE according to the service offloading method in the fourth embodiment of the present invention, which includes the following steps:

501. The user plane entity monitors service quality information of the subordinate UE.

502. The user plane entity monitors whether the quality of service of the UE that is provided by the UE is lower than a preset lower limit.

Parameters that characterize quality of service include, but are not limited to, the following parameters: throughput, latency, jitter, cache queue length, and so on. In this step, the user plane entity judges the quality of service of each UE served by the UE in a polling manner, and if it is lower than the lower limit, step 503 is performed; otherwise, if it is greater than or equal to the lower limit, Go back to step 501. In addition, the user plane entity may also perform service quality judgment only for a specific UE, and the present invention is not limited thereto.

503. Whether the UE with low quality of service can find an alternative RRU.

Since the user plane entity grasps the traffic load information of all the subordinate RRUs and the service quality information of the UE, the user plane entity can easily find an alternative RRU. In this step, the RRU is an RRU of the same standard that belongs to the user plane entity. For example, the UE with low quality of service is in the coverage of RRU-A and RRU-B, and the RRU-A and the RRU-B are the same. The RRU of the standard, controlled and current user plane entity, if currently served by the RRU-A, the RRU-B As an alternative RRU.

In general, if the signal of the RRU-B receiving the low quality of service UE is greater than the signal strength of the RRU-A currently providing the service, and the current load of the RRU-B is lower than the current load of the RRU-A, the RRU-B may be considered Executing 504 is an alternative RRU; otherwise, it is considered that there is no substitute RRU, and step 505 is performed.

504. Incorporate a low quality of service UE with an alternative RRU into the candidate set A.

505. Incorporate a low quality of service UE that does not have an alternative RRU into a focused monitoring set. In this step, the user plane entity returns the low quality of service UEs, for example, a software dynamically updated database, to step 501, so that in step 501, the UEs in the key monitoring sets are used as monitoring objects with higher priority. Monitoring, for example, monitoring UEs in the focused monitoring set with higher frequency and shorter interval than other UEs.

FIG. 9B is a flowchart of determining, according to the traffic load information of the subordinate RRU, whether the user plane entity needs to perform service offloading to the UE according to the traffic load information of the subordinate RRU in the fourth embodiment of the service offloading method of the present invention, which includes the following steps:

601. The user plane entity monitors traffic load information of the subordinate RRU.

The user plane entity monitors traffic load information for all of the following RRUs flowing through the user plane entity.

602. The user plane entity monitors whether the data traffic flowing through the RRU exceeds a preset value.

In this step, the data traffic includes the downlink data traffic from the SDN-GW to the UE, and the uplink service from the UE to the SDN-GW. If the preset value is exceeded, step 603 is performed; otherwise, the process returns to step 601.

603. Select a low quality of service UE served by the heavy load RRU.

Since the user plane entity holds the traffic load information of all the subordinate RRUs and the service quality information of the UE, the quality of service is a vector composed of multiple parameters. Therefore, the user plane entity can easily find a low quality of service UE served by a heavily loaded RRU. For example, for real-time sensitive service types, delay is used as the most important parameter to measure the quality of service, and the UE with the longest delay is used as the UE with low quality of service. For the non-real-time sensitive service type, the throughput is used. The most important parameter to measure the quality of service is to use the UE with the lowest throughput as the UE with low quality of service. Specifically, the user plane entity may all the UEs served by the heavily loaded RRU obtain a table according to the quality of service from low to high, and preset the quality of service level, and use the UE with the lowest quality of service as the low quality of service. UE.

604. Whether the low quality of service UE can find an alternative RRU. Whether the user plane entity can find the substitute RRU for the low quality of service UE, if it finds, execute step 605; otherwise, if there is no substitute RRU, then return to step 603 to continue the table according to the quality of service from low to high. , Find the UE with low quality of service step by step. For details, refer to step 503 in Figure 9A above, and details are not described herein again.

605. Incorporate a low quality of service UE with an alternative RRU into the candidate set A.

FIG. 10 is a schematic structural diagram of Embodiment 1 of a control network element according to the present invention. As shown in FIG. 10, the control network element 100 provided in this embodiment includes:

The receiving module 11 is configured to receive monitoring information sent by each user plane entity, where the monitoring information includes: traffic load information, and/or service quality information, where the traffic load information is a radio remote unit RRU of each user plane entity Traffic load information, the quality of service information is quality of service information of the user equipment UE served by the RRU;

The obtaining module 12 is configured to obtain a routing flow table, where the routing flow table is stored in the gateway router GR. The determining module 13 is configured to determine, according to the monitoring information received by the receiving module 11 and the routing flow table obtained by the obtaining module 12, whether the need is needed. Divide the traffic for the UE.

The control network element provided by the embodiment of the present invention aggregates the traffic load information sent by the user plane entity of each standard network, and/or the service quality information, and obtains the routing flow table from the gateway router to obtain the whole network information, according to the whole network. Information, to determine whether it is necessary to offload traffic to certain UEs. In the service offloading process, the independent control network element performs the service offloading decision and scheduling, which reduces the load of the eNB and improves the applicable scope and scalability of the service offloading technology. In addition, since the control network element performs the service shunting decision and scheduling according to the whole network information, the shunting between the RRUs of different standard networks is realized, and the service shunting between the RRUs of the same type of network is also realized.

Further, the receiving module 11 is further configured to receive a service offloading request sent by a part of the user plane entities in each user plane entity;

The determining module 13 is configured to, according to the monitoring information and the routing flow table, whether it is necessary to perform traffic offloading for the UE that is served by the RRU subordinate to the user plane entity that initiates the service offloading request.

FIG. 11 is a schematic structural diagram of Embodiment 2 of a control network element according to the present invention. The control network element provided in this embodiment, based on the foregoing FIG. 10, further includes:

The sending module 14 is configured to send a configuration instruction to the GR to update the routing flow table if the determining module 13 determines that the service needs to be offloaded for the UE.

Further, each user plane entity includes: a user plane of at least one evolved Node B eNB An entity, and a user plane entity of at least one access point AP.

FIG. 12 is a schematic structural diagram of Embodiment 1 of a user plane entity according to the present invention. As shown in FIG. 12, the user plane entity 200 provided in this embodiment includes:

The monitoring module 21 is configured to monitor and obtain monitoring information for each of the subordinate remote radio unit RRUs, and/or the user equipment UE served by each RRU, where the monitoring information includes: traffic load information, and/or service quality information. The traffic load information is traffic load information of the RRU, and the service quality information is service quality information of the UE;

The sending module 22 is configured to send the monitoring information monitored by the monitoring module 21 to the control network element, so that the control network element determines, according to the monitoring information and the routing flow table, whether the service is required to be offloaded for the UE.

According to the user plane entity provided by the embodiment of the present invention, the user plane entity of each standard network sends traffic load information, and/or service quality information to the control network element, so that the control network element sends the received user plane entity of each standard network. The traffic load information, and/or the QoS information, and the routing flow table obtained from the gateway router are summarized to obtain the information of the entire network. According to the information of the entire network, it is determined whether the service is to be offloaded to certain UEs. In the service offloading process, the independent control network element performs the service offloading decision and scheduling, which reduces the load of the eNB and improves the application scope and scalability of the service offloading technology. In addition, since the control network element performs the service shunting decision and scheduling according to the whole network information, the shunting between the RRUs of different standard networks is realized, and the service shunting between the RRUs of the same type of network is also realized.

13 is a schematic structural diagram of a second embodiment of the user plane entity of the present invention. The user plane entity provided in this embodiment is based on the foregoing FIG. 12, and further, the monitoring module 21 includes a judging unit 211 and a selecting unit 212;

The determining unit 211 is configured to determine whether the data traffic flowing through each RRU exceeds a preset value, the traffic data includes an uplink data traffic, and/or a downlink data traffic, and the selecting unit 212 is configured to: if the determining unit 211 determines that the data traffic exceeds The preset value is used to select an alternative RRU and a service cooperative transmission mode for the UE with low quality of service according to the quality of service, and the service cooperation transmission manner includes: switching the low quality of service UE to replace the RRU, or lowering the quality of service Part of the UE's service is switched to replace the RRU.

Further, the determining unit 211 is configured to determine whether the quality of service of the UE is lower than a preset value, and the selecting unit 212 is configured to: if the determining unit 211 determines that the quality of service is lower than the preset value, select, for the UE with low quality of service, Alternative RRU and business collaboration delivery method, business collaboration delivery package Including: switching the low quality of service UE to replace the RRU, or switching part of the service of the low quality of service UE to the replaceable RRU.

Further, the sending module 22 is further configured to send a service offloading request to the control network element, where the service offloading request carries at least one of the following information: an identifier of the UE with low quality of service, a service identifier of the UE with low quality of service, and data. The identifier of the RRU whose traffic exceeds the preset value, the identifier that can replace the RRU, and the identifier of the service collaboration transmission mode.

Further, the selecting unit 212 is specifically configured to select, as the substitute RRU, an RRU that receives a low quality of service UE with a signal strength greater than or equal to a current RRU and a load lower than a current RRU.

FIG. 14 is a schematic structural diagram of Embodiment 1 of a gateway router according to the present invention. As shown in FIG. 14, the gateway router 300 provided in this embodiment includes:

The receiving module 31 is configured to receive, by the control network, a configuration command sent by the control network element, where the configuration command is used by the control network to determine, according to the monitoring information and the routing flow table, that the user equipment UE needs to be service-diverted and sent;

The processing module 32 is configured to update the routing flow table according to the configuration command received by the receiving module 31.

The gateway router provided by the embodiment of the present invention, the receiving control network element determines the configuration command that needs to be sent after the service is offloaded by the UE, and updates the routing flow table according to the configuration command, so that part or all of the services of the UE that need to be offloaded are needed. Switch to another RRU. During the service offloading process, the independent control network element performs the service offloading decision and scheduling, which reduces the load of the eNB and improves the application scope and scalability of the service offloading technology. In addition, since the control network element performs the service shunting decision and scheduling according to the whole network information, the shunting between the RRUs of different standard networks is realized, and the service shunting between the RRUs of the same type of network is also realized.

Further, the processing module 32 is further configured to update the forwarding table of the switch according to the updated routing flow table, where the switch is located on a forwarding path of the gateway router and the user plane entity.

FIG. 15 is a schematic structural diagram of Embodiment 3 of a control network element according to the present invention. As shown in FIG. 15, the control network element 400 provided by this embodiment includes:

The receiver 41 is configured to receive monitoring information sent by each user plane entity, where the monitoring information includes: traffic load information, and/or service quality information, where the traffic load information is a radio remote unit RRU of each user plane entity Traffic load information, service quality information is provided by RRU Service quality information of the user equipment UE;

The processor 42 is configured to obtain a routing flow table, where the routing flow table is stored in the gateway router GR. The processor 42 is further configured to determine, according to the monitoring information and the routing flow table, whether the service is required to be offloaded for the UE.

Further, the receiver 41 is further configured to receive a service offloading request sent by a part of the user plane entities in each user plane entity;

The processor 42 is specifically configured to perform service offloading for the UE that is served by the RRU subordinate to the user plane entity that initiates the service offload request according to the monitoring information and the routing flow table.

FIG. 16 is a schematic structural diagram of Embodiment 4 of a control network element according to the present invention. The control network element in this embodiment is based on the control network element in FIG. 15, and further includes:

The transmitter 43 is configured to send a configuration instruction to the GR to update the routing flow table if it is determined that the service needs to be offloaded for the UE.

Further, each user plane entity includes: a user plane entity of at least one evolved Node B eNB, and a user plane entity of at least one access point AP.

FIG. 17 is a schematic structural diagram of Embodiment 3 of a user plane entity according to the present invention. As shown in FIG. 17, the user plane entity 500 provided by this embodiment includes:

The processor 51 is configured to monitor, by each of the subordinate remote radio unit RRUs, and/or the user equipment UE served by each RRU, the monitoring information, where the monitoring information includes: traffic load information, and/or service quality information The traffic load information is traffic load information of the RRU, and the service quality information is service quality information of the UE;

The transmitter 52 is configured to send the monitoring information to the control network element, so that the control network element determines, according to the monitoring information and the routing flow table, whether the service is required to be offloaded for the UE.

Further, the processor 51 is specifically configured to determine whether the data traffic flowing through each RRU exceeds a preset value, the traffic data includes uplink data traffic, and/or downlink data traffic; if exceeded, according to the quality of service, in turn, low The quality of service UE selection can replace the RRU and the service cooperation transmission mode. The service cooperation transmission mode includes: switching the low quality of service UE to the replaceable RRU, or switching part of the low quality of service UE to the replaceable RRU.

Further, the processor 51 is specifically configured to determine whether the quality of service of the UE is lower than a preset value. If the quality of service is lower than the preset value, the UE selects an alternative RRU and a service collaboration transmission mode for the UE with low quality of service. The transmission method includes: switching the low quality of service UE to replace RRU, or, switch part of the service of the low quality of service UE to replace the RRU.

Further, the transmitter 52 is further configured to send a service offloading request to the control network element, where the service offloading request carries at least one of the following information: an identifier of the UE with low quality of service, a service identifier of the UE with low quality of service, and data. The identifier of the RRU whose traffic exceeds the preset value, the identifier of the RRU that can be replaced, and the identifier of the service collaboration transmission mode.

Further, the processor 51 is configured to select an RRU that receives a low quality of service UE with a signal strength greater than or equal to a current RRU and a lower load than the current RRU as an alternative RRU.

FIG. 18 is a schematic structural diagram of Embodiment 2 of a gateway router according to the present invention. As shown in FIG. 18, the gateway router 600 provided in this embodiment includes:

The receiver 61 is configured to receive, by the device, a configuration command sent by the control network element, where the configuration command is used by the control network to determine, according to the monitoring information and the routing flow table, that the user equipment UE needs to be service-diverted and sent;

The processor 62 is configured to update the routing flow table according to the configuration command.

Further, the processor 62 is further configured to update the forwarding of the switch according to the updated routing flow table, where the switch is located on a forwarding path of the gateway router and the user plane entity.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. A business offloading method, characterized by including:

The control network element receives monitoring information sent by each user plane entity. The monitoring information includes: traffic load information, and/or service quality information, where the traffic load information is the remote radio frequency subordinate to each user plane entity. The traffic load information of the unit RRU, the service quality information is the service quality information of the user equipment UE provided by the RRU;

The control network element obtains a routing flow table, which is stored in the gateway router GR; the control network element determines whether it is necessary to offload services for the UE based on the monitoring information and the routing flow table.

2. The method according to claim 1, characterized in that, before the control network element determines whether it is necessary to offload services for the UE according to the monitoring information and the routing flow table, the method includes:

The control network element receives a service offload request sent by some user plane entities in each of the user plane entities;

The control network element determines whether it is necessary to offload services for the UE based on the monitoring information and the routing flow table, including:

The control network element determines, based on the monitoring information and the routing flow table, whether it is necessary to perform service offloading for the UE provided by the RRU subordinate to the user plane entity that initiated the service offloading request.

3. The method according to claim 1 or 2, characterized in that, after the control network element determines whether it is necessary to offload services for the UE according to the monitoring information and the routing flow table, it further includes:

If it is determined that service offloading is required for the UE, the control network element sends a configuration instruction to the GR to update the routing flow table.

4. The method according to any one of claims 1 to 3, characterized in that,

The respective user plane entities include: at least one user plane entity of the evolved node B eNB, and at least one user plane entity of the access point AP.

5. A business diversion method, characterized by including:

The user plane entity monitors each subordinate radio frequency remote unit RRU and/or the user equipment UE provided by each of the RRUs to obtain monitoring information. The monitoring information includes: Traffic flow load information, and/or service quality information, wherein the traffic load information is the traffic load information of the RRU, and the service quality information is the service quality information of the UE;

The user plane entity sends the monitoring information to the control network element, so that the control network element determines whether it is necessary to offload services for the UE based on the monitoring information and the routing flow table.

6. The method according to claim 5, characterized in that the user plane entity monitors each subordinate radio frequency remote unit RRU to obtain monitoring information; including:

The user plane entity determines whether the data traffic flowing through each of the RRUs exceeds a preset value. The traffic data includes uplink data traffic and/or downlink data traffic;

If it exceeds, then the user plane entity selects alternative RRUs and service cooperation transmission methods for the UE with low service quality in turn according to the service quality. The service cooperation transmission method includes: switching the low service quality UE to the The RRU may be replaced, or part of the services of the UE with low service quality may be switched to the replaceable RRU.

7. The method according to claim 5, characterized in that the user plane entity monitors the user equipment UE served by each of the RRUs to obtain monitoring information; including:

The user plane entity determines whether the service quality of the UE is lower than a preset value;

If the service quality is lower than the preset value, the user plane entity selects an alternative RRU and a service cooperation transmission method for the UE with low service quality. The service cooperation transmission method includes: converting the low service quality UE to The UE switches to the replaceable RRU, or switches part of the services of the UE with low service quality to the replaceable RRU.

8. The method according to claim 6 or 7, characterized in that the user plane entity monitors each subordinate radio frequency remote unit RRU and/or the user equipment UE provided by each of the RRUs. After monitoring the information, before sending the monitoring information to the control network element, it also includes:

The user plane entity sends a service offload request to the control network element, and the service offload request carries at least one of the following information: the identification of the low service quality UE, the service of the low service quality UE The identification, the identification of the RRU whose data traffic exceeds the preset value, the identification of the replaceable RRU, and the identification of the service cooperation transmission method.

9. The method according to claim 6 or 7, characterized in that the user plane entity selects an alternative RRU for a UE with low service quality, including:

The user plane entity selects to receive the signal strength of the UE with low service quality greater than or equal to An RRU that is smaller than the current RRU and has a load lower than the current RRU is used as a replaceable RRU.

10. A business offloading method, characterized by including:

The gateway router receives the configuration instruction sent by the control network element. The configuration instruction is sent after the control network determines that it needs to perform business offloading for the user equipment UE based on the monitoring information and the routing flow table;

11. The method according to claim 10, characterized in that, after the gateway router updates the routing flow table according to the configuration command, it further includes:

The gateway router updates the forwarding table of the switch based on the updated routing flow table. The switch is located on the forwarding path between the gateway router and the user plane entity.

12. A control network element, characterized by: including:

A receiving module, configured to receive monitoring information sent by each user plane entity. The monitoring information includes: traffic load information, and/or service quality information, where the traffic load information is the radio frequency subordinate to each user plane entity. Traffic load information of the remote unit RRU, where the service quality information is the service quality information of the user equipment UE provided by the RRU;

The acquisition module is used to obtain the routing flow table, which is stored in the gateway router GR;

A determining module, configured to determine whether business offloading is required for the UE based on the monitoring information received by the receiving module and the routing flow table obtained by the obtaining module.

13. The control network element according to claim 12, characterized in that,

The receiving module is also configured to receive service offload requests sent by some user plane entities in each of the user plane entities;

The determination module is configured to determine, based on the monitoring information and the routing flow table, whether it is indeed necessary to perform service offloading for the UE provided by the RRU subordinate to the user plane entity that initiated the service offloading request.

14. The control network element according to claim 12 or 13, characterized in that the control network element further includes:

A sending module, configured to send a configuration instruction to the GR to update the routing flow table if the determining module determines that service offloading is required for the UE.

15. The control network element according to any one of claims 12 to 14, characterized in that, The respective user plane entities include: a user plane entity of at least one evolved Node B eNB, and a user plane entity of at least one access point AP.

16. A user plane entity, characterized by: including:

A monitoring module configured to monitor each subordinate radio remote unit RRU and/or the user equipment UE served by each RRU to obtain monitoring information, where the monitoring information includes: traffic load information, and/or, Quality of service information, wherein the traffic load information is the traffic load information of the RRU, and the quality of service information is the quality of service information of the UE;

A sending module, configured to send the monitoring information monitored by the monitoring module to the control network element, so that the control network element determines whether business offloading is required for the UE based on the monitoring information and the routing flow table.

17. The user plane entity according to claim 16, characterized in that the monitoring module includes a judgment unit and a selection unit;

The judgment unit is used to judge whether the data flow flowing through each of the RRUs exceeds a preset value. The flow data includes uplink data flow and/or downlink data flow;

The selection unit is configured to, if the judgment unit determines that the data traffic exceeds the preset value, select alternative RRUs and service collaboration transmission methods for UEs with low service quality in sequence according to the service quality, and the service The cooperative transmission method includes: switching the UE with low service quality to the replaceable RRU, or switching part of the services of the UE with low service quality to the replaceable RRU.

18. The user plane entity according to claim 16, characterized in that the monitoring module includes a judgment unit and a selection unit;

The judgment unit is used to judge whether the service quality of the UE is lower than the preset value; the selection unit is used to determine whether the service quality is lower than the preset value, then it is low. The service quality UE selects a replaceable RRU and a service cooperation transmission method. The service cooperation transmission method includes: switching the low service quality UE to the low service quality RRU, or, switching part of the low service quality UE The service is switched to the replaceable RRU.

19. The user plane entity according to claim 17 or 18, characterized in that the sending module is further configured to send a service offload request to the control network element, and the service offload request carries at least one of the following information One: the identification of the UE with low service quality, the service identification of the UE with low service quality, the identification of the RRU whose data traffic exceeds the preset value, the representative Replace the identity of the RRU and the identity of the service coordination transmission mode.

20. The user plane entity according to claim 17 or 18, characterized in that the selection unit is specifically configured to select a UE that receives the low service quality whose signal strength is greater than or equal to the current RRU and whose load is lower than the current RRU. Describes the RRU of the current RRU as a replaceable RRU.

21. A gateway router, characterized by including:

A receiving module, configured to receive configuration instructions sent by the control network element. The configuration instructions are sent after the control network determines that business offloading is required for the user equipment UE based on the monitoring information and the routing flow table;

A processing module, configured to update the routing flow table according to the configuration command received by the receiving module.

22. The gateway router according to claim 21, characterized in that,

The processing module is also configured to update the forwarding table of the switch based on the updated routing flow table. The switch is located on the forwarding path between the gateway router and the user plane entity.

23. A control network element, characterized by: including:

A receiver configured to receive monitoring information sent by each user plane entity. The monitoring information includes: traffic load information, and/or service quality information, where the traffic load information is the radio frequency subordinate to each user plane entity. Traffic load information of the remote unit RRU, where the service quality information is the service quality information of the user equipment UE provided by the RRU;

The processor is used to obtain the routing flow table, which is stored in the gateway router GR; the processor is also used to determine whether it is necessary to perform the routing for the UE based on the monitoring information and the routing flow table. Business diversion.

24. The control network element according to claim 23, characterized in that,

The receiver is also configured to receive service offload requests sent by some user plane entities in each of the user plane entities;

The processor is specifically configured to determine, based on the monitoring information and the routing flow table, whether it is necessary to perform service offloading for the UE provided by the RRU subordinate to the user plane entity that initiated the service offloading request.

25. The control network element according to claim 23 or 24, characterized in that, the control network element further includes: A sender, configured to send a configuration instruction to the GR to update the routing flow table if it is determined that service offloading is required for the UE.

26. The control network element according to any one of claims 23 to 25, characterized in that each user plane entity includes: a user plane entity of at least one evolved node B eNB, and a user plane entity of at least one access point AP User plane entity.

27. A user plane entity, characterized by: including:

A processor configured to monitor each subordinate radio remote unit RRU and/or the user equipment UE provided by each RRU to obtain monitoring information, where the monitoring information includes: traffic load information, and/or, Quality of service information, wherein the traffic load information is the traffic load information of the RRU, and the quality of service information is the quality of service information of the UE;

A transmitter, configured to send the monitoring information to the control network element, so that the control network element determines whether service offloading is required for the UE based on the monitoring information and the routing flow table.

28. The user plane entity according to claim 27, characterized in that,

The processor is specifically configured to determine whether the data traffic flowing through each of the RRUs exceeds a preset value. The traffic data includes uplink data traffic and/or downlink data traffic; if it exceeds, then according to the service quality, in turn Select an alternative RRU and a service cooperation transmission method for the UE with low service quality. The service cooperation transmission method includes: switching the low service quality UE to the alternative RRU, or, switching the low service quality UE to the alternative RRU. Some services are switched to the replaceable RRU.

29. The user plane entity according to claim 27, characterized in that,

The processor is specifically configured to determine whether the service quality of the UE is lower than the preset value; if the service quality is lower than the preset value, select an alternative RRU and service cooperative transmission for the UE with low service quality. The service cooperation transmission method includes: switching the UE with low service quality to the replaceable RRU, or switching part of the services of the UE with low service quality to the replaceable RRU.

30. The user plane entity according to claim 28 or 29, characterized in that,

The sender is also configured to send a service offload request to the control network element, where the service offload request carries at least one of the following information: the identification of the UE with low service quality, the UE with low service quality. The service identifier of the UE, the identifier of the RRU whose data traffic exceeds the preset value, the identifier of the replaceable RRU, and the identifier of the service cooperation transmission method.

31. The user plane entity according to claim 28 or 29, characterized in that the processor is used to select the signal strength of the UE receiving the low quality of service to be greater than or equal to the current RRU, and the load is lower than the The RRU of the current RRU serves as a replaceable RRU.

32. A gateway router, characterized by including:

A receiver, configured to receive a configuration instruction sent by the control network element, where the configuration instruction is sent after the control network determines that it needs to perform business offloading for the user equipment UE based on the monitoring information and the routing flow table;

A processor, configured to update the routing flow table according to the configuration command.

33. The gateway router according to claim 32, characterized in that,

The processor is also configured to update the forwarding table of the switch based on the updated routing flow table. The switch is located on the forwarding path between the gateway router and the user plane entity.