WO2012163002A1

WO2012163002A1 - Ps data unloading method, base station, and base station control device

Info

Publication number: WO2012163002A1
Application number: PCT/CN2011/080740
Authority: WO
Inventors: 杨宾和; 刘建军; 雍文远; 顾威; 刘雍青; 齐江
Original assignee: 华为技术有限公司
Priority date: 2011-10-13
Filing date: 2011-10-13
Publication date: 2012-12-06
Also published as: CN103168495A; CN103168495B

Abstract

Disclosed are a packet switched domain (PS) data unloading method, a base station, and a base station control device. The method comprises: after receiving uplink air interface data sent by a user equipment (UE), a base station processes the first layer protocol and the second layer protocol of a wireless interface protocol on the uplink air interface data to obtain uplink PS data; and the base station sends the uplink PS data directly to an external network via a transmission network between the base station and the external network. The establishment of a second layer example of a PS service user plane wireless interface protocol on the base station ensures that the base station is capable of performing PS service user plane wireless interface protocol second layer processing to the PS data, thereby unloading and shunting partial PS data services; shunting partial PS data services using a low-cost transmission network not only meets the growing needs of the PS data services, but also reduces the occupancy of the PS data services to the feedback link resources of the base station control device, and the upgrading capacity expansion cost of the base station control device.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a packet switched domain data offloading method, a base station, and a base station control device.

Background technique

UMTS (Universal Mobile Telecom System) is a third-generation mobile communication system using WCDMA (Wideband Code Division Multiple Access) air interface technology. UMTS includes RAN (Radio Access Network). Network), CN (Core Network), and UE (User Equipment). The RAN is used to manage all wireless related functions, and the CN is used to manage all voice calls and data connections in the UMTS system, as well as switching and routing functions with external networks. The CN is logically divided into CS (Circuit Switched Domain) and PS (Packet Switched Domain). The CS is mainly responsible for voice services, and the PS is mainly responsible for mobile data services.

UTRAN is a terrestrial radio access network that contains one or several Radio Network Subsystems (RNS). An RNS consists of a Radio Network Controller (RNC) and one or more base stations (NodeBs). The RNC is connected to the CN through the Iu port. The NodeB and the RNC are connected through the lub port. The NodeB communicates with the UE through the Uu port. The RNC is used to allocate and control the radio resources of the NodeB connected or related to it. The NodeB is used to complete the data stream conversion between the lub port and the Uu port, and also participates in some radio resource management.

In the 3GPP standard, the RAN is connected to the PS core network through the Iu PS port. In the PS service, a considerable proportion is Internet services, and eventually the GGSN needs to route the Internet service to the external network. The transmission path of the PS data is: The UE uploads the PS data to the NodeB through the Uu port, and the NodeB transmits the PS data to the RNC through the lub port, and the RNC transmits the PS data to the CN through the Iu PS port, and the PS data sequentially passes through the CN. After the SGSN (Serving GPRS Support Node) and the GGSN (Gateway GPRS Support Node), it is transmitted from the GGSN's Gi (GPRS to Internet) interface to the external network.

Since the mobile Internet service (such as web application, file transfer, P2P, etc.) of the data service entity is a low-value service for the wireless carrier, the increment does not increase, and the core network expands and rises. The level of cost is high, so the current status of UMTS systems is becoming more and more inconsistent with the rapid growth of data services. The prior art offloads low-value packet services to an external network by adding a Gi interface on the RNC side.

In the process of implementing the present invention, the inventor has found that at least the following problems exist in the prior art: The method for adding the Gi interface to offload PS data on the RNC side can reduce the expansion cost of the PS core network and the IP broadband transmission, but does not save. The Iub backhaul link resource from the NodeB to the RNC and the upgrade and expansion cost of the RNC device, and these expansion costs account for a large proportion of the operator's investment.

Summary of the invention

The object of the embodiments of the present invention is to provide a PS data offloading method, a base station, and a base station control device, to reduce the occupation of the backhaul link resources of the base station control device and the base station control while satisfying the growth demand of the PS data service. Equipment upgrade and expansion costs.

First, the embodiment of the present invention provides a PS offloading method. After receiving the uplink air interface data sent by the user equipment UE, the base station performs a radio interface protocol layer 1 protocol and a layer 2 protocol processing on the uplink air interface data, to obtain Uplink packet switched domain PS data;

The base station directly transmits the uplink PS data to the external network through a transmission network with the external network.

Secondly, an embodiment of the present invention provides a PS offloading method, including:

When receiving the radio access bearer RAB establishment request for the user equipment UE, determining, according to the service information and/or the user information of the UE, whether the RAB corresponding to the UE conforms to the service-based and/or user-based offload policy;

If yes, the base station sends an offload setup request to the base station, so that the base station establishes a second layer instance of the packet switched domain PS service user plane radio interface protocol for the UE, so that after receiving the uplink air interface data sent by the UE, the base station The uplink air interface data is processed by the first layer protocol and the second layer protocol of the radio interface protocol to obtain uplink PS data, and the uplink PS data is directly transmitted to the external network through a transmission network with the external network.

The embodiment of the present invention provides a base station, where the base station includes:

a protocol processing module, configured to: after receiving the uplink air interface data sent by the user equipment UE, The uplink air interface data is processed by the first layer protocol and the second layer protocol of the radio interface protocol to obtain uplink packet switching domain PS data;

And a sending module, configured to directly transmit the uplink PS data to the external network through a transmission network between the external network and the external network.

Finally, an embodiment of the present invention provides a base station control device, including:

The first determining module is configured to determine, according to the service information and/or user information of the UE, whether the RAB corresponding to the UE is in compliance with the service and/or, when receiving the radio access bearer RAB establishment request for the user equipment UE Or based on the user's offload strategy;

a sending module, configured to: when the determining result of the first determining module is yes, send an unloading setup request to the base station, so that the base station establishes a second layer instance of the packet switching domain PS service user plane radio interface protocol for the UE, Therefore, after receiving the uplink air interface data sent by the UE, the base station performs radio interface protocol layer 1 protocol and layer 2 protocol processing on the uplink air interface data to obtain uplink PS data, and passes the uplink PS data and The transport network between the external networks is passed directly to the external network.

The PS data offloading method, the base station, and the base station control device in the embodiment of the present invention establish a second layer instance of the PS service user plane radio interface protocol on the base station, so that the base station can perform PS service user plane radio interface protocol second on the PS data. Layer processing, thereby offloading a part of the PS data service, and using a cheap transmission network (such as xDSL or PON) other than the RAN and CN to divert a part of the PS service data, thereby ensuring the normal operation of the PS data service and reducing the PS The data service's occupation of the backhaul link resources and the upgrade and expansion requirements of the base station control equipment meet the growth demand of the PS data service, and reduce the occupation of the backhaul link resources of the PS data service to the base station control equipment and the base station control equipment. Upgrade and expansion costs.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic flow chart of a first embodiment of a PS data offloading method according to an embodiment of the present invention; FIG. 2 is a schematic flowchart of a second embodiment of a PS data unloading method according to an embodiment of the present invention; A schematic flowchart of a third embodiment of a PS data offloading method; FIG. 4 is a schematic diagram of a protocol stack docking relationship between a base station and an external network;

5 is a schematic diagram of a connection relationship between a base station, a base station control device, and a protocol stack on a GGSN; 6 is a schematic flowchart of an example of releasing a second layer of a PS user plane corresponding to FIG. 3. FIG. 7 is a schematic flowchart of a specific embodiment of a PS data offloading method according to an embodiment of the present invention; FIG. 8 is a release PS corresponding to FIG. FIG. 9 is a schematic structural diagram of a first embodiment of a base station according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a second embodiment of a base station according to an embodiment of the present invention; FIG.

11 is a schematic structural diagram of a first embodiment of a base station control device according to an embodiment of the present invention; FIG. 12 is a schematic structural diagram of a second embodiment of a base station control device according to an embodiment of the present invention; A schematic structural view of a third embodiment of the apparatus.

detailed description

The above described objects, features, and advantages of the present invention will be more apparent from the aspects of the invention.

Embodiment 1

This embodiment provides a PS data offloading method, as shown in FIG. 1, including:

After receiving the uplink air interface data sent by the UE, the base station performs radio interface protocol layer 1 protocol and layer 2 protocol processing on the uplink air interface data to obtain uplink PS data.

For the case where the base station integrates the functions of the base station control device (for example, the evolved base station eNB in the Long Term Evolution LTE network architecture), the base station itself can process the first layer protocol and the second layer protocol of the radio interface protocol, and the radio interface protocol through the base station After the Layer 2 protocol is processed, the PS data is obtained.

5102. The base station directly transmits the uplink PS data obtained in step S101 to the external network through a transmission network between the external network and the external network.

The external network may be, for example, an external Internet, an intranet or a server of another company, etc., and the transmission network between the base station and the external network is an inexpensive transmission network other than RAN (Radio Access Network) and CN (Core Network), such as xDSL. (Digital Subscriber Line), PON (Passive Optical Network) and other networks.

In this embodiment, an interface that can directly communicate with an external network is configured on the base station, and the interface may be

Gi interface. After the uplink air interface data is processed by the PS service user plane radio interface protocol layer 1 protocol and the second layer protocol, the obtained uplink PS data is obtained, and then the base station can split the uplink PS data transmission from the core network, and use the base station. For example, the Gi interface is directly transmitted to the external network through a transmission network with an external network, and can be regarded as using a third sheet other than the RAN and the CN. The network passes the uplink PS data to the external network.

For networks such as LTE, the S 1 backhaul link between the eNB and the core network and the upgrade and expansion cost of the MME (Mobility Management Entity)/SGW (Serving Gateway) device in the core network will Occupy a large proportion of the operator's investment, and for the network such as UMTS, CDMA, or CDMA2000, the Iub backhaul link between the base station and the RNC/BSC (Base Station Controller) in the RAN and the RNC/BSC device The upgrade and expansion cost will occupy a large proportion of the operator's investment. Therefore, if the PS data transmission can reduce the utilization of the S1 port/Iub port resources, the growth of the PS data service can be reduced to the Sl/Iub backhaul link and the MME. /SGW/RNC/BSC equipment upgrade and expansion requirements.

The embodiment of the present invention utilizes an inexpensive transmission network (for example, xDSL, PON, etc.) to offload PS service data, thereby ensuring normal operation of the PS data service and reducing the data service to the Sl/Iub backhaul link and the MME/ The upgrade and expansion requirements of the SGW/RNC/BSC equipment meet the growth requirements of the PS data service, and reduce the occupation of the backhaul link resources of the base station control equipment and the upgrade and expansion cost of the base station control equipment. The PS data offloading method of the embodiment of the present invention is described below by taking a network such as LTE in which the base station and the base station control device are integrated, and a network such as UMTS, CDMA, or CDMA2000, in which the base station and the base station control device are separated, as an example.

First, the PS data offloading method for the LTE network is introduced. In the LTE network architecture, the base station and the base station control set are integrated (that is, the eNB).

Referring to FIG. 2, S201, after receiving the uplink air interface data sent by the UE, the eNB performs a radio interface protocol layer 1 protocol and a layer 2 protocol processing on the uplink air interface data to obtain uplink PS data.

S202. The eNB directly transmits the uplink PS data obtained in step S201 to the external network through a transmission network with the external network.

The eNB itself has the processing capability of the second layer of the PS service user plane radio interface protocol. When receiving the RAB (Radio Access Bearer) setup request for the UE sent by the core network, the eNB may determine, according to the service information and/or the user information of the UE, whether the RAB corresponding to the UE is based on the service and/or the user. The offloading policy, or judging whether the service corresponding to the RAB can be offloaded. If the result of the determination is yes, the interface resource for communicating with the external network is reserved for the UE. Specifically, determining whether the RAB corresponding to the UE is in accordance with the service-based and/or the user-based offloading policy, the method includes: determining, according to the service information of the UE, whether the service type of the RAB corresponding to the UE belongs to the traffic-diversible service type range, and if yes, Determining whether the RAB corresponding to the UE is in accordance with the traffic-based offloading policy; and/or determining whether the user of the UE belongs to the user range that can be offloaded according to the user information of the UE, and if yes, determining that the RAB corresponding to the UE conforms to the user-based offloading policy.

The service information includes one or a combination of the following information: Traffic Class service class, service level; User information includes one or a combination of the following information: IMEI (International Mobile Equipment Identity, International Mobile Equipment Identity), IMSI (International) Mobile Subscriberdentification Number, the APN access point name accessed by the UE, the ARP address resolution protocol level to which the UE belongs, and the Cell ID cell identifier where the UE is located.

The foregoing service information and user information may be referred to as uninstallation information because it can be judged whether or not the uninstallation can be performed. In other words, the uninstallation information may include any one or a combination of the above various service information and specific information among various user information. The traffic-based and/or user-based offload policies may be stored on the eNB or on other third party storage devices capable of communicating with the eNB. See the example in Table 1 for business-based and/or user-based shunting strategies:

Table 1

For the IMEI, the USB dongle or the data card data card is regarded as satisfying the condition of offload offload; for the IMSI, the local subscriber belongs to the local subscriber as the condition; for the Traffic Class, it can be regarded as the interactive interactive or the background backdrop. To meet the conditions, Or, the service of the Interactive class is unloaded, and the service of the Background class is not uninstalled. The specificity can be set according to actual needs. For the ARP level, it can be a condition that belongs to Gold, Silver, or Bronze, or is considered to be a condition for Gold. For Silver or Bronze, the condition is not satisfied; for APN, the access point name that meets the Internet access is considered as a condition; for Cell lD, the cell located at the edge of the network coverage is considered as not satisfied.

Optionally, the uninstallation information can be obtained by:

Acquiring service information and/or user information of the UE from the RAB establishment request; acquiring service information and/or user information of the UE from a packet data protocol PDP context activation request;

Obtaining the service information and/or user information of the UE from the service request.

Optionally, a network-side control policy may be performed on the eNB for the specific service of the uplink PS data, so as to implement QoS (Quality of Service) control or load balancing, that is, before S202, It can also include:

S202al, the eNB determines whether the uplink PS data obtained in step S201 is consistent with the base station unloading condition; if yes, the eNB performs step S202.

The base station unloading condition may be that the destination IP address of the uplink PS data does not belong to the preset blacklist list or belongs to the preset whitelist list, etc., and is specifically determined according to the operator's control policy. The destination IP address of the uplink PS data is already available due to the processing of the second layer of the radio interface protocol of the PS service user plane. The base station offload condition may be located on the eNB or on other third party storage devices capable of communicating with the eNB. The base station offload condition can reflect the offload control performed by the operator based on the specific service of the uplink PS data.

When the determination result of S202al is negative, the method further includes: S202a2: The eNB transmits the uplink PS data obtained in step S201 to the external network through the core network by using the backhaul link. The backhaul link here refers to the S1 backhaul link between the eNB and the MME/SGW.

Correspondingly, the method may further include: S203: When receiving the downlink PS data sent by the external network from the transmission network, the eNB performs the second layer protocol and the first layer protocol processing of the PS service user plane radio interface protocol on the downlink PS data; The eNB sends the processed downlink PS data to the corresponding UE.

Since the IP address and port allocated by the core network to the UE are invisible to the transmission network, the eNB needs to convert the IP address and port allocated by the core network to the UE in the PS data to be identifiable by the transmission network. IP address and port.

Therefore, before S202, the eNB may further include: converting, by the eNB, the IP address and port allocated by the core network to the UE in the uplink PS data obtained in step S201 into an IP address and a port of the transmission network;

Before S204, the method may further include: the eNB converting the transport network IP address and port in the processed downlink PS data into an IP address and a port allocated by the core network to the UE.

When the core network detects that the UE does not send data for a certain predetermined time, or the core network receives the release request sent by the UE, the core network sends an RAB release request to the eNB. The release process may refer to the existing process, where the reference is no longer Narration. Second, the following describes a PS data offloading method for a network such as UMTS, CDMA, or CDMA2000, in which the base station is separated from the base station control device.

Referring to FIG. 3, S301, when receiving the RAB establishment request for the UE, the base station control device determines, according to the service information and/or the user information of the UE, whether the RAB corresponding to the UE conforms to the service-based and/or user-based offload policy.

Determining whether the RAB corresponding to the UE conforms to the service-based and/or user-based offloading policy may specifically include:

Determining, according to the service information of the UE, whether the service type of the RAB corresponding to the UE belongs to the traffic-diversible service type range, and if yes, determining that the RAB corresponding to the UE conforms to the service-based offload policy; and/or, according to the user information of the UE And determining whether the user of the UE belongs to the user range that can be offloaded. If yes, determining that the RAB corresponding to the UE conforms to the user-based offload policy.

The service information may include one or a combination of the following information: a service category, a service level, and the like; the user information may include one or a combination of the following information: IMEI of the UE, IMSI, APN accessed by the UE, ARP level to which the UE belongs, UE The Cell ID, etc. The service information and the user information can be referred to as uninstall information because it can be judged whether or not the uninstallation can be performed.

Optionally, the base station control device can obtain the uninstallation information by:

Acquiring service information and/or user information of the UE from the RAB establishment request; acquiring service information and/or user information of the UE from a packet data protocol PDP context activation request; Obtaining the service information and/or user information of the UE from the service request.

The traffic-based and/or user-based offloading policies may be located on the base station control device or on other third party storage devices capable of communicating with the base station control device.

If the result of the determination in S301 is YES, then S302: the base station control device sends an offload setup request to the base station, and proceeds to S304; if not, then S303: establishes, on the base station control device, a second layer instance of the PS service user plane radio interface protocol for the UE, For the process of establishing the second layer instance of the radio interface protocol of the user plane of the PS service on the base station control device, refer to the existing process, and details are not described herein again.

When the base station receives the offload setup request sent by the base station control device for the UE, S304: The base station establishes a second layer instance of the PS service user plane radio interface protocol for the UE.

The base station of this embodiment has the second layer processing capability of the PS service user plane radio interface protocol, but the base station does not establish the second layer instance of the PS service user plane radio interface protocol for all users and services. After the base station control device performs the judgment based on the service and/or the user-based offload policy according to the obtained offload information, if the service of the UE can be offloaded to the base station for offloading, the base station control device sends an offload setup request to the base station, The unloading setup request may carry the RAB information, the RB information, the PDCP (Packet Data Convergence Protocol) information, and the RLC (Radio Link Control) information required to establish the second layer instance of the PS service user plane radio interface protocol. The RB information may include an RB identifier and the like, and may include an RAB identifier, a QoS of the service data, an assignment rate, and the like. Then, the base station establishes a second layer instance of the PS service user plane radio interface protocol for the UE according to the information carried in the offload setup request, and returns an offload setup response to the base station control device.

After the second layer instance of the PS service user plane radio interface protocol is established on the base station, the protocol stack between the base station and the external network is shown in FIG. 4. It can be seen that the protocol stack on the base station includes the PS service user plane radio interface protocol second. Layer protocol: MAC, RLC, and PDCP layer protocols. Through the IP layer protocol in the base station protocol stack, it can be seen that the base station can encapsulate the air interface data into IP data packets or decapsulate the IP data packets into air interface data.

After the S304, the method may further include: when the base station receives the offload reconfiguration request that is sent by the base station control device for the UE and carries the RLC layer encryption parameter and the OLPC (Outer Loop Power Control) parameter, the base station is configured according to The offload reconfiguration request completes encryption and power control of the uplink PS data of the UE. After receiving the uplink air interface data sent by the UE, the base station performs radio interface protocol layer 1 protocol and layer 2 protocol processing on the uplink air interface data to obtain uplink PS data. The PS data is obtained through the second layer processing of the PS service user plane wireless interface protocol.

5306. The base station directly transmits the uplink PS data to the external network through a transmission network between the external network and the external network.

Optionally, for the specific service of the uplink PS data, performing a network-side offload control policy on the base station, so as to achieve the purpose of QoS control or load balancing, that is, before S306, the method may further include S306al: the base station determines the uplink. Whether the PS data conforms to the base station unloading condition.

The base station offload condition may be located on the base station or on other third party storage devices capable of communicating with the base station. The base station unloading condition may be that the destination IP address of the uplink PS data does not belong to the preset blacklist list. If the destination IP address of the uplink PS data is not included in the blacklist list of the IP address segment, the base station is allowed to directly forward to the outside through the base station. If the destination IP address of the uplink PS data is included in the blacklist of the IP address segment, the direct forwarding by the base station is not allowed.

Of course, the base station unloading condition may also be that the destination IP address of the uplink PS data belongs to a preset whitelist, that is, when the destination IP address of the uplink PS data is included in the whitelist, the uplink PS data is allowed to pass through the base station. Direct forwarding. The base station unloading condition can be specifically determined according to the operator's shunt control policy.

By establishing a second layer instance of the PS service user plane radio interface protocol on the base station, the base station can process more Layer 2 protocols of the PS service user plane, whereby the base station can identify on the basis of the second layer protocol of the PS service user plane. The IP address in the air interface data of the IP layer is sent out, and then the uplink PS data is unloaded and shunted according to the IP address.

If the result of the determination in S306a is YES, the base station performs step S306; since not all uplink PS data can satisfy the unloading condition, when the judgment result of S306al is negative, the base station may include S306s2: the base station uses the backhaul link to uplink. PS data is passed to the external network through the core network. The backhaul link here refers to the Iub backhaul link between the base station and the base station control device.

Since the base station control device establishes the second layer instance of the PS service user plane radio interface protocol on the base station, the protocol stack docking relationship between the base station and the base station control device is adjusted accordingly, and the adjusted base station and the base station control device are See Figure 5 for the protocol stack docking relationship.

It can be seen that since the base station can process the uplink PS data into IP data packets, By performing UDP (User Datagram Protocol) and IP FP (Network Protocol File Protocol) processing, it can be directly transmitted to the base station control device; after that, the base station control device passes the uplink PS data through the GTPU according to the existing process. The encapsulated user data protocol is encapsulated as a GTPU packet that is passed to the core network for subsequent processing and transmission.

Correspondingly, the method further includes: S307, when receiving the downlink PS data sent by the external network from the transmission network, the base station performs the second layer protocol of the PS service user plane radio interface protocol and the first layer protocol processing on the downlink PS data; S308, The base station sends the processed downlink PS data to the corresponding UE.

Since the IP address and port allocated by the core network to the UE are invisible to the transmission network, the base station needs to convert the IP address and port allocated by the core network to the UE in the PS data into an IP address and port recognizable by the transmission network.

Therefore, before the S306, the base station may further include: the base station converts the IP address and port allocated by the core network to the UE in the processed uplink PS data into an IP address and a port of the transmission network; and before S308, the base station further includes: the downlink that is processed by the base station The transport network IP address and port in the PS data are converted to the IP address and port assigned by the core network to the UE.

Referring to FIG. 6, when the core network detects that the UE does not send data for more than a predetermined time, or the core network receives the release request sent by the UE, S309, the core network sends an RAB release request to the base station control device, and the RAB release request carries at least The RAB identity and the radio bearer RB identity associated with the RAB identity.

S310: After receiving the RAB release request carrying the RAB identifier, the base station control device determines whether the second layer instance of the PS service user plane radio interface protocol is established by the base station for the UE, and if yes, the SeNB: the base station control device notifies the base station to release The second layer instance of the PS service user plane radio interface protocol established by the UE for the RAB; if not, the S312: the base station control device releases the second radio interface protocol for the PS service user plane established for the RAB for the UE Layer instance.

The base station control device notifying the base station to release the PS layer user plane radio interface protocol established for the UE may include:

The base station control device sends an offload release request to the base station; the offload release request carries at least the RAB identifier and the wireless 7-carrier RB identifier associated with the RAB identifier;

The base station releases the second layer instance of the PS service user plane radio interface protocol related to the RAB identifier and the RB identifier, and returns an offload release response to the base station control device. The following is a specific example of the UMTS network, where the base station control device is an RNC, and the method is described by taking the PDP context activation request sent by the UE to the SGSN of the core network as an example (refer to FIG. 7).

S401. The UE initiates an RRC (Radio Resource Control Protocol) connection process when accessing;

S402: The UE sends a PDP context activation request to the SGSN. The PDP context activation request carries information such as IMEI, IMSI, ARP, APN, Cell ID, PDP type, and QoS of service data to be sent.

S403. The SGSN sends an RAB establishment request to the RNC. The RAB establishment request carries a traffic class, QoS, and the like of the service data to be sent by the UE.

S404. The RNC obtains the service information and/or the user information of the UE from the PDP context activation request and/or the RAB establishment request, and determines, according to the service information and/or the user information of the UE, whether the RAB corresponding to the UE conforms to the service-based and/or User-based shunting strategy. As can be seen from the business-based and/or user-based offloading policies, the policy is based on the business and/or user's policies, where the business is subject to a rougher judgment, such as a judgment of the business category.

If the service-based and/or user-based offloading policy is met, S405: Send an offload setup request to the base station; the Offload setup request may carry RAB information, RB information, PDCP information, RLC information, uplink and downlink transport channel information, and the like. , then enter S406;

If the service-based and/or the user-based offloading policy is not met, the RL (Radio Link) reconfiguration process and the RB establishment process are performed according to the flow of the prior art, and the Iub interface resource is allocated to the UE, and then sent by the UE. The uplink PS data is transmitted to the external network through the core network according to the existing process;

S406: The base station establishes a second layer instance of the radio service interface of the PS service according to the offload establishment request.

5407. The base station returns an offload setup response to the RNC.

S408, the RNC completes the RL reconfiguration process with the base station, and completes the establishment of the RL.

5409, an RB is established between the RNC and the UE;

5410: The RNC sends an offload reconfiguration request to the base station, where the RLC layer encryption parameter and the OLPC parameter are carried, so that the base station completes the encryption and power control process of the second layer of the PS service user plane radio interface protocol; 5411, the RNC returns a RAB establishment response to the SGSN, and the RAB is established;

5412. The SGSN returns a PDP context activation accept response to the UE.

5413. The UE sends uplink air interface data to the base station.

5414. The base station performs radio interface protocol layer 1 protocol and layer 2 protocol processing on the uplink air interface data, to obtain uplink PS data.

5415, the base station determines whether the uplink PS data meets the base station unloading condition;

If yes, then S416: converting the IP address and port allocated by the mobile network to the UE in the uplink PS data to the IP address and port of the transmission network;

5417. The base station directly transmits the converted uplink PS data to the external network by using a transmission network between the external network and the external network.

5418, the base station receives downlink PS data sent by the external network from the transmission network;

S419: The base station performs a second layer protocol of the PS service user plane radio interface protocol and the first layer protocol processing on the downlink PS data.

5420. The base station converts the transport network IP address and port in the processed downlink PS data into an IP address and a port allocated by the mobile network to the UE.

5421, the base station sends the converted downlink PS data to the UE;

If the determination result in S415 is no, the base station transmits the processed uplink PS data to the RNC through a backhaul link with the radio network controller RNC, so that the RNC transmits the uplink PS data to the outside through the core network. The internet;

The base station encapsulates the uplink PS data into IP FP data and transmits it to the RNC through a backhaul link with the RNC, after which the RNC encapsulates the IP FP data processing into GTPU data, and transmits the uplink PS data through the GGSN of the core network. To the external network;

The downlink PS data sent by the external network is transmitted to the RNC through the core network, so that the RNC is sent to the base station through the back link between the RNC and further returned to the UE;

The downlink PS data sent by the external network is transmitted to the GGSN of the core network, and the GGSN encapsulates the downlink PS data into GTPU data and sends the data to the RNC. The RNC processes the GTPU data into IP FP data and transmits the data to the base station, and the base station processes the IP FP data. Then return to the UE through the air interface.

When the CN detects that the UE does not send data for a certain predetermined time, or the CN receives the release request sent by the UE, the SGSN initiates a process of releasing the air interface resource, as shown in FIG. 8: 5501, the SGSN sends an RAB release request to the RNC; the RAB release request carries the RAB identifier, and the like;

5502, the RNC determines whether the second layer instance of the PS service user plane radio interface protocol is established by the base station for the UE.

If yes, then S503: the RNC sends an offload release request to the base station; the offload release request carries the RAB identifier and the RB identifier associated with the RAB identifier; if not, step S506 is directly performed;

S504: The base station releases a second layer instance of the PS service user plane radio interface protocol related to the RAB identifier and the RB identifier.

S505. The base station returns an offload release response to the RNC.

5506, the RNC and the base station complete the RL reconfiguration process; release the RL associated with the RAB identifier;

5507, the RB is released between the RNC and the UE, where the RB corresponds to the foregoing RB identifier;

5508, the RNC returns an RAB release response to the SGSN.

In the PS data offloading method of the embodiment, the second layer instance of the PS service user plane radio interface protocol is established on the base station, so that the base station can perform the second layer processing of the PS service user plane radio interface protocol on the PS data, thereby offloading the offload. A part of the PS data service uses a low-cost transmission network (such as xDSL or PON) other than the RAN and CN to divert a part of the PS service data, thereby ensuring the normal operation of the PS data service and reducing the PS data service to the backhaul link. The resource occupation and the upgrade and expansion requirements of the base station control device meet the growth demand of the PS data service, and reduce the occupation of the backhaul link resources of the PS data service to the base station control device and the upgrade and expansion cost of the base station control device.

In addition, by further performing screening for the base station offload condition on the base station, it is possible to perform finer shunt control according to the specific service of each uplink PS data, thereby implementing QoS control or load balancing. For uplink PS data that cannot be offloaded by the base station, the uplink PS data is transmitted from the core network to the external network by using a backhaul link to ensure the reliability of the PS data service. Embodiment 2

This embodiment provides a base station, as shown in FIG. 9, including a protocol processing module 21 and a sending module 22. The protocol processing module 21 is configured to: after receiving the uplink air interface data sent by the UE, perform radio interface protocol layer 1 protocol and layer 2 protocol processing on the uplink air interface data to obtain uplink PS data; and send module 22 is configured to use the uplink data. The PS data is directly transmitted to the external network through a transmission network with the external network.

When the base station is an eNB, the base station itself has the processing capability of the second layer of the PS service user plane radio interface protocol. When receiving the RAB establishment request for the UE sent by the core network, the base station may determine, according to the service information and/or the user information of the UE, whether the RAB corresponding to the UE conforms to the service-based and/or user-based offload policy, or Determine whether the service corresponding to the RAB can be offloaded. If the result of the determination is yes, the interface resources for communicating with the external network are reserved for the UE.

The determining, by the base station, whether the RAB corresponding to the UE conforms to the service-based and/or the user-based traffic-dividing policy may include: determining, according to the service information of the UE, whether the service type of the RAB corresponding to the UE belongs to the traffic-diversible service type range, and if yes, determining The RAB corresponding to the UE is in accordance with the service-based offload policy; and/or, according to the user information of the UE, whether the user of the UE belongs to the user range that can be offloaded, and if yes, it is determined that the RAB corresponding to the UE conforms to the user-based offload policy.

The service information includes one or a combination of the following information: Traffic Class, service level; user information includes one or a combination of the following information: IMEI of the UE, IMSI, APN accessed by the UE, ARP level to which the UE belongs, and Cell where the UE is located ID.

The foregoing service information and user information may be referred to as uninstallation information because it can be judged whether or not the uninstallation can be performed. In other words, the uninstallation information may include any one or a combination of the above various service information and specific information among various user information. The traffic-based and/or user-based offload policies may be stored on the base station or on other third party storage devices capable of communicating with the base station.

For a base station in a network such as UMTS, CDMA, or CDMA2000, determining whether the RAB corresponding to the UE conforms to the service-based and/or user-based offload policy is performed by the base station control device, and when the base station control device determines that the RAB corresponding to the UE is based on The service and/or the user-based offloading policy sends an offloading setup request to the base station, where the offloading setup request may carry the RAB information, the RB information, the PDCP information, and the RLC required to establish the second layer instance of the PS service user plane radio interface protocol. The information and the uplink and downlink transmission channel information, etc.; the RAB information may include the RAB identifier, the QoS of the service data, the assignment rate, and the like, and the RB information may include the RB identifier and the like. In this regard, the base station may also include (see FIG. 10):

The establishing module 23 is configured to establish a second layer instance of the PS service user plane radio interface protocol for the UE when receiving the offload setup request sent by the base station control device for the UE.

Optionally, for the specific service of the uplink PS data, performing a network-side offload control policy on the base station, so as to achieve the purpose of QoS control or load balancing, the base station may further include:

The determining module 24 is configured to determine whether the uplink PS data meets the base station unloading condition; if yes, the calling sending module 22 performs the step of directly transmitting the uplink PS data to the external network through the transmission network between the external network and the external network.

The base station offload condition may be located on the base station or on other third party storage devices capable of communicating with the base station. The base station unloading condition may be that the destination IP address of the uplink PS data does not belong to a preset blacklist or belongs to a preset whitelist or the like.

The sending module 22 is further configured to: when the determining result of the determining module 24 is negative, use the backhaul link to transmit the uplink PS data to the external network through the core network.

The base station may further include:

The configuration module 25 is configured to, after receiving the offload reconfiguration request that carries the RLC layer encryption parameter and the OLPC parameter sent by the base station control device for the UE, complete the uplink PS data of the UE according to the offload reconfiguration request. Encryption and power control.

Correspondingly, the protocol processing module 21 is further configured to: when receiving the downlink PS data sent by the external network from the transmission network, perform the second layer protocol and the first layer of the PS service user plane radio interface protocol for the downlink PS data. Protocol processing;

The sending module 22 is further configured to: send the processed downlink PS data to the corresponding UE.

Since the IP address and port allocated by the core network to the UE are invisible to the transmission network, the base station needs to convert the IP address and port allocated by the core network to the UE in the PS data into an IP address and port recognizable by the transmission network. Therefore, The base station may further include:

The conversion module 26 is configured to: before the sending module 22 delivers the uplink PS data, convert the IP address and port allocated by the core network to the UE in the uplink PS data into an IP address and a port of the transmission network; and, after processing Before the downlink PS data is sent to the UE, the transport network IP address and port in the processed downlink PS data are converted into an IP address and port allocated by the core network to the UE. When the core network detects that the UE does not send data for a predetermined period of time, or the core network receives the release request sent by the UE, the core network sends an RAB release request to the base station control device, and the RAB release request carries at least the RAB identifier and the The RAB identifies the associated radio bearer RB identifier, and the base station control device sends an offload release request to the base station.

The base station may further include:

The releasing module 27 is configured to release, after receiving the uninstall release request that is sent by the base station control device and carrying at least the RAB identifier, the second layer instance of the PS service user plane radio interface protocol established for the RAB.

The base station in this embodiment establishes a second layer instance of the PS service user plane radio interface protocol on the base station, so that the base station can perform the second layer processing of the PS service user plane radio interface protocol on the PS data, thereby offloading and offloading a part of the PS data service. The use of an inexpensive transmission network (such as xDSL or PON) other than the RAN and the CN to offload a part of the PS service data, thereby ensuring the normal operation of the PS data service and reducing the occupation of the backhaul link resources by the PS data service and The upgrade and expansion requirements of the base station control device meet the growth requirements of the PS data service, and reduce the occupation of the backhaul link resources of the PS data service to the base station control device and the upgrade and expansion cost of the base station control device.

In addition, by further performing screening for the base station offload condition on the base station, it is possible to perform finer shunt control according to the specific service of each uplink PS data, thereby implementing QoS control or load balancing. For uplink PS data that cannot be offloaded by the base station, the uplink PS data is transmitted from the core network to the external network by using a backhaul link to ensure the reliability of the PS data service. Embodiment 3

This embodiment provides a base station control device, as shown in FIG. 11, including a first determining module 11 and a sending module 12.

The first judging module 11 is configured to determine, according to the service information and/or the user information of the UE, whether the RAB corresponding to the UE conforms to the service-based and/or user-based offloading policy, when receiving the RAB establishment request for the UE;

Referring to FIG. 12, the first determining module 11 may include: a first determining unit 111, and/or a second determining unit 112, where:

The first determining unit 111 is configured to determine, according to the service information of the UE, the RAB corresponding to the UE. Whether the service type belongs to the traffic-diversible service type range, and if yes, it is determined that the RAB corresponding to the UE conforms to the service-based traffic distribution policy;

The second determining unit 112 is configured to determine, according to the user information of the UE, whether the user of the UE belongs to the user range that can be offloaded, and if yes, determine that the RAB corresponding to the UE conforms to the user-based shunting policy.

The foregoing service information and user information may be referred to as uninstallation information because it can be judged whether or not the uninstallation can be performed. In other words, the uninstallation information may include any one or a combination of the above various service information and specific information among various user information.

The sending module 12 is configured to: when the determining result of the first determining module 11 is yes, send an offloading setup request to the base station, so that the base station establishes a second layer instance of the PS service user plane radio interface protocol for the UE, so that the base station is in the base station After receiving the uplink air interface data sent by the UE, performing radio interface protocol layer 1 protocol and layer 2 protocol processing on the uplink air interface data, obtaining uplink PS data, and passing the uplink PS data to a transmission network between the uplink network and the external network. Pass directly to the external network.

Referring to FIG. 13, the base station control device may further include: an obtaining module 13 configured to perform one or a combination of the following functions:

Obtaining the service information and/or user information of the foregoing UE from the RAB establishment request;

Obtaining the service information and/or user information of the UE from the PDP context activation request/service request;

Obtaining the UE's service information and/or user information from the service request.

The base station control device may further include:

The second determining module 14 is configured to: after receiving the RAB release request carrying the RAB identifier, determine whether the second layer instance of the PS service user plane radio interface protocol for the RAB is established by the base station for the UE;

The sending module 12 is further configured to: when the determining result of the second determining module 14 is yes, notify the base station to release the second layer of the radio interface protocol for the PS service user plane established for the UE for the RAB. example.

The base station control device of this embodiment establishes a second layer instance of the PS service user plane radio interface protocol on the base station, so that the base station can perform the second layer processing of the PS service user plane radio interface protocol on the PS data, thereby offloading the part of the shunt. The PS data service uses a low-cost transmission network (such as xDSL or PON) other than the RAN and CN to divert a part of the PS service data, thereby ensuring the normal operation of the PS data service and reducing the PS data service to the backhaul link resource. The occupation and the upgrade and expansion requirements of the base station control device meet the growth demand of the PS data service, and reduce the occupation of the backhaul link resources of the PS data service to the base station control device and the upgrade and expansion cost of the base station control device.

In addition, by further performing screening for the base station offload condition on the base station, it is possible to perform finer shunt control according to the specific service of each uplink PS data, thereby implementing QoS control or load balancing. For uplink PS data that cannot be offloaded by the base station, the uplink PS data is transmitted from the core network to the external network by using a backhaul link to ensure the reliability of the PS data service.

For the second embodiment, the third embodiment is similar to the first embodiment. Therefore, the description is simplified. For related information, refer to the first embodiment, and details are not described herein.

It will be understood by those skilled in the art that all or part of the steps of the foregoing embodiments may be implemented by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, such as: ROM / RAM, disk, CD, etc.

It should be noted that, in this context, relational terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply such entities or operations. There is any such actual relationship or order between them. Furthermore, the terms "including", "comprising" or "comprising" or "comprising" are intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that includes a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. An element defined by the statement "comprising a ..." without further limitation does not exclude the existence of additional identical elements in the process, method, article or device including the element.

The above description is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Rights request

A packet switching domain data offloading method, the method comprising: after receiving the uplink air interface data sent by the user equipment UE, the base station performs a radio interface protocol first layer protocol and the first air interface data Layer 2 protocol processing, obtaining uplink packet switching domain PS data;

The method according to claim 1, wherein before the UE sends the uplink air interface data, the method further includes: when the base station receives the offload setup request sent by the base station control device for the UE, the base station establishes a PS service for the UE User plane wireless interface protocol layer 2 instance.

The method according to claim 2, wherein the offloading setup request carries radio access bearer RAB information, radio bearer RB information, packet data concentration protocol PDCP information, radio link control RLC information, and upper and lower Line transmission channel information;

And establishing, by the UE, the second layer instance of the PS service user plane radio interface protocol, where the base station establishes a second layer instance of the PS service user plane radio interface protocol for the UE according to the information carried by the offload setup request.

The method according to claim 1, wherein before the base station directly transmits the uplink PS data to the external network through the transmission network, the method further includes:

Determining, by the base station, whether the uplink PS data meets a base station unloading condition;

If so, the base station performs the step of directly transmitting the uplink PS data to the external network through the transport network with the external network.

The method according to claim 4, wherein the base station unloading condition is that the destination IP address of the uplink PS data does not belong to a preset blacklist or belongs to a preset whitelist.

The method according to claim 4, wherein the method further comprises: when the uplink PS data does not comply with a base station unloading condition, the base station transmits the uplink PS data through a core network by using a backhaul link. Give the external network.

7. The method of claim 1, wherein the method further comprises: when received When the base station control device sends an offload reconfiguration request for the UE that carries the radio link control RLC layer encryption parameter and the outer loop power control OLPC parameter, the base station completes uplink to the UE according to the offload reconfiguration request. PS data is encrypted and power controlled.

The method according to any one of claims 1 to 7, wherein the method further comprises: when receiving downlink PS data sent by an external network from the transmission network, the base station is in the downlink The PS data is processed by the PS service user plane radio interface protocol layer 2 protocol and the first layer protocol; the base station sends the processed downlink PS data to the corresponding UE.

9. The method of claim 8 wherein:

Before the transmitting the uplink PS data, the method further includes: converting, by the base station, an IP address and a port allocated by the core network to the UE in the uplink PS data to an IP address and a port of the transport network; Before the processed downlink PS data is sent to the UE, the method further includes: the base station converting the transport network IP address and the port in the processed downlink PS data into an IP address and a port allocated by the core network to the UE.

The method according to any one of claims 1 to 7, wherein the method further comprises: after receiving the uninstall release request carrying the RAB identifier sent by the base station control device, the base station is released as a The second layer instance of the PS service user plane radio interface protocol established by the UE for the RAB.

11. A packet switching domain data offloading method, characterized in that

Upon receiving a radio access bearer RAB setup request for the user equipment UE, according to the

Determining, by the service information and/or the user information of the UE, whether the RAB corresponding to the UE conforms to the service-based and/or user-based offloading policy;

If yes, the base station sends an offload setup request to the base station, so that the base station establishes a second layer instance of the packet switching domain PS service user plane radio interface protocol for the UE, so that the base station receives the uplink air interface data sent by the UE after the base station The uplink air interface data is processed by the radio interface protocol layer 1 protocol and the second layer protocol to obtain uplink PS data, and the uplink PS data is directly transmitted to the external network through the transmission network with the external network.

The method according to claim 11, wherein the RAB corresponding to the UE is determined Compliance with business-based and/or user-based offload policies, including:

Determining, according to the service information of the UE, whether the service type of the RAB corresponding to the UE belongs to a traffic-differentiable service type range, and if yes, determining that the RAB corresponding to the UE conforms to the service-based offload policy; and/or,

And determining, according to the user information of the UE, whether the user of the UE belongs to a user range that can be offloaded. If yes, determining that the RAB corresponding to the UE conforms to a user-based offload policy.

13. The method of claim 12, wherein

The service information includes one or a combination of the following information: a service category, a service level; the user information includes one or a combination of the following information: an international mobile device identifier of the UE, an international mobile station identifier, and a UE access The name of the ingress, the address resolution protocol level to which the UE belongs, and the cell ID where the UE is located.

14. The method according to claim 13, wherein the method further comprises one or a combination of the following steps:

The method according to any one of claims 11 to 14, wherein after receiving the RAB release request carrying the RAB identifier, determining whether the packet switched domain PS service user plane is established for the UE by using the base station. The second layer instance of the wireless interface protocol;

If yes, the base station is notified to release the second layer instance of the PS service user plane radio interface protocol established for the UE for the RAB.

16. A base station, comprising:

The protocol processing module is configured to: after receiving the uplink air interface data sent by the user equipment UE, performing radio interface protocol layer 1 protocol and layer 2 protocol processing on the uplink air interface data, to obtain uplink packet switching domain PS data;

a sending module, configured to directly send the uplink PS data to a transmission network between the external network and the external network Passed to the external network.

The base station according to claim 16, wherein the base station further includes: an establishing module, configured to establish a PS service user plane for the UE when receiving an offload setup request sent by the base station control device for the UE The second layer instance of the wireless interface protocol.

The base station according to claim 16, wherein the base station further includes: a determining module, configured to determine whether the uplink PS data meets a base station unloading condition; if yes, invoking the sending module to execute the The step of transmitting the uplink PS data directly to the external network through the transmission network with the external network.

The base station according to claim 18, wherein the sending module is further configured to: when the determining result of the determining module is negative, use the backhaul link to transmit the uplink PS data through the core network Give the external network.

The base station according to claim 16, wherein the base station further comprises: a configuration module, configured to: after receiving the radio link control RLC layer encryption parameter sent by the base station control device for the UE When the ring power control is performed on the offload reconfiguration request of the OLPC parameter, the uplink PS data of the UE is encrypted and power controlled according to the offload reconfiguration request.

The base station according to any one of claims 16 to 20, wherein the protocol processing module is further configured to: when receiving downlink PS data sent by an external network from the transmission network, to the downlink The PS data is used to perform the PS service user plane radio interface protocol layer 2 protocol and the first layer protocol processing; the sending module is further configured to: send the processed downlink PS data to the corresponding UE.

The base station according to claim 21, wherein the base station further includes: a converting module, configured to allocate, by the core network in the uplink PS data, the UE, before transmitting the uplink PS data Converting the IP address and port to the IP address and port of the transport network; and, before transmitting the processed downlink PS data to the UE, transmitting the transport network IP address and port in the processed downlink PS data Convert to the IP address and port assigned by the core network to the UE.

The method according to any one of claims 16 to 20, wherein the base station further comprises: a release module, configured to release, after receiving the uninstall release request carrying the RAB identifier sent by the base station control device, A second layer instance of the PS service user plane radio interface protocol established for the UE for the RAB.

24. A base station control device, comprising:

The base station control device according to claim 24, wherein the first determining module comprises: a first determining unit, and/or a second determining unit, wherein

The first determining unit is configured to determine, according to the service information of the UE, whether the service type of the RAB corresponding to the UE belongs to a traffic-differentiable service type range, and if yes, determine that the RAB corresponding to the UE is consistent with the service-based service. Diversion strategy;

The second determining unit is configured to determine, according to the user information of the UE, whether the user of the UE belongs to a user range that can be offloaded, and if yes, determine that the RAB corresponding to the UE conforms to a user-based offload policy.

The base station control device according to claim 25, wherein the base station control device further comprises: an obtaining module, configured to perform one of the following functions or a combination thereof:

The base station control device according to any one of claims 23 to 26, wherein the base station control device further comprises:

a second determining module, configured to determine, after receiving the RAB release request carrying the RAB identifier Whether a second layer instance of a packet switched domain PS service user plane radio interface protocol for the RAB is established for the UE by the base station;

The sending module is further configured to: when the determining result of the second determining module is yes, notify the base station to release the second layer instance of the PS service user plane radio interface protocol established for the RAB for the RAB.