KR20130017709A - Base station and virtual base station system for controllling connection of data offloading - Google Patents

Abstract

PURPOSE: A base station device and a virtualization base station system are provided to offer an effective data transmission environment to a terminal by directly transmitting the data of a specific subscriber to a data network. CONSTITUTION: A local breakout service unit(107) directly connects to an internet network. The local breakout service unit provides a local breakout service which transmits data to the Internet network. A determination unit(105) determines the subscriber identification information of a call setup target. The determination unit determines the provision of a local breakout service. A storage unit(104) stores a local breakout service target as the subscriber identification information. [Reference numerals] (101) Call connecting unit; (103) Storage unit; (105) Determination unit; (107) Local breakout service unit; (109) Data service unit

Description

BASE STATION AND VIRTUAL BASE STATION SYSTEM FOR CONTROLLLING CONNECTION OF DATA OFFLOADING}

The present invention relates to a base station apparatus and a virtual base station system for controlling a data offloading connection.

Recent wireless communication systems not only provide basic voice services, but also use packet-based communication systems to gradually expand the provision of data services.

In general, since a wireless communication system providing a data service to a user transmits a packet through a network of the service provider, all data for the service is concentrated in the network of the service provider.

In addition, regardless of the location of the Internet server to which the user wants to connect, the packet data is unconditionally passed through the operator's network. For example, in the case of providing a home network service, the data generated in the home passes through the operator's network. There is an irrationality of returning to the home network. In other words, even though it is possible to connect directly from the base station to the Internet network, there is a problem that a bypass must be made by using the data transmission path of the operator network.

Therefore, although the packet data does not need to pass through the network of the operator, the unnecessary load is generated due to passing through the network of the operator, and there is a problem that a transmission delay occurs due to an inefficient data transmission path. In addition, as the amount of data used by users increases, the load concentrated on the network increases.

Accordingly, an aspect of the present invention is to provide a base station apparatus and a virtual base station system for controlling data offloading access based on subscriber identification information.

According to one aspect of the invention there is provided a base station apparatus. The apparatus includes a local breakout service unit connected to an internet network to provide a local breakout service for transmitting data to the internet network; And a determination unit determining whether to provide the local breakout service by determining whether the subscriber identification information of the call setup target is predefined specific subscriber identification information.

According to another feature of the invention there is provided a virtualized base station system. The system includes a virtual server coupled to the core system for processing wireless digital signals; And a plurality of wireless units installed in a service area and physically separated from the virtual server, and converting and amplifying a wireless digital signal received from the virtual server.

The virtual server may include: a local breakout service unit connected to an internet network to provide a local breakout service for transmitting data to the internet network; And a determination unit determining whether to provide the local breakout service by determining whether the subscriber identification information of the call setup target is predefined specific subscriber identification information.

At this time, the base station apparatus and the virtual server,

A storage unit which stores subscriber identification information which is a target of local breakout service; And a call connection unit configured to receive an initial context request message from a mobility management object, complete an call setup by transmitting an initial context response message to the mobility management object.

The determination unit determines whether the subscriber identification information extracted from the initial context request message is subscriber identification information of a local breakout service object stored in the storage unit.

In addition, the base station apparatus and the virtual server,

If the subscriber identification information extracted from the initial context request message is not a local breakout service target, data is transmitted to a serving gateway, the serving gateway transmits the received data to the internet network through a packet data network gateway. The service unit further includes.

According to an embodiment of the present invention, data of a specific subscriber is directly transmitted to the data network without passing through the core network, thereby providing an efficient data transmission environment for the terminal.

1 shows a configuration of a mobile communication system according to an embodiment of the present invention.
2 shows a configuration of a mobile communication system according to another embodiment of the present invention.
3 is a block diagram showing the configuration of a base station and a virtual server according to an embodiment of the present invention.
4 is a flowchart illustrating a data offloading access control method according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

Also, the term "part" in the description means a unit for processing at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software.

Hereinafter, a base station apparatus and a virtual base station system for controlling a data offloading connection according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a configuration of a mobile communication system according to an embodiment of the present invention.

Referring to FIG. 1, a user equipment (UE) 1 is connected to a long term evolution (LTE) network 2 to receive a data service.

The LTE network supports only a packet switch (PS) scheme, and includes a base station 100, a mobility management entity (MME) 200, a home location register (HLR) 300, and a serving gateway. (S-GW, Serving Gateway) 400, a Packet Data Network Gateway (P-GW) 500 and the Internet network 600.

Here, the base station 100 is a base station apparatus of a wireless access network of an LTE network, and includes an eNodeB that manages a high power macro cell or a HeNB that manages a low power femto cell.

The base station 100 supports a paging request for CS fallback, a function of delivering an SMS message to the mobile terminal 1, and a direct connection function to a target cell capable of CS service.

The mobility management object (MME) 200 relates to non-access signaling (NAS), NAS signaling security, mobility management of the mobile terminal 1, and location of an idle mode UE. It performs functions such as roaming, authentication, bearer management, and the like.

The HLR 300 manages subscriber information and location information of the mobile terminal 1.

The serving gateway (S-GW) 400 serves as a mobility anchor when the mobile terminal 1 moves between handovers between the base stations 100 or between 3GPP wireless networks.

The packet data network gateway (P-GW) 500 allocates an Internet Protocol (IP) address of the mobile terminal 1, performs packet data related functions of the core network, and between a 3GPP wireless network and a non-3GPP wireless network. It acts as a mobility anchor when moving.

At this time, the base station 100 may be implemented in a virtual form, as shown in FIG.

2 shows a configuration of a mobile communication system according to another embodiment of the present invention.

Referring to FIG. 2, a mobile station (UE) 1 is connected to a Long Term Evolution (LTE) network 2 to receive a data service.

Such LTE networks include virtualized base station system 700, mobility management object (MME) 200, HLR 300, serving gateway (S-GW) 400, packet data network gateway (P-GW) 500, and Internet network 600 is included.

In this case, the mobility management object (MME) 200, the HLR 300, the serving gateway (S-GW) 400, and the packet data network gateway (P-GW) 500 are the same as those described with reference to FIG. 1. Description is omitted.

The virtualized base station system 700 includes a virtual server 730 in which a plurality of wireless units 710 and a plurality of digital units 731 processing wireless digital signals are centralized.

Here, the plurality of wireless units 710 are physically separated from the virtual server 730 and installed in a service area, that is, a cell site. For example, each cell of the Long Term Evolution (LTE) network, each cell of the High Speed Packet Access (HSPA) + network, and each cell of the Worldwide Interoperability for Microwave Access (WiMAX) network is installed. The wireless unit 710 transmits a baseband signal to the corresponding digital unit 731 and converts the digital signal received from the digital unit 731 into a radio frequency (RF) signal according to a frequency band and transmits and receives the signal to an antenna. It consists of an inverter and an RF amplifier.

In this case, the plurality of wireless units 710 may be respectively installed in the macro cell area to manage the macro cell using high output power.

In addition, the plurality of wireless units 710 may be respectively installed in the femto cell area to manage the femto cell using a small power. Here, a femto cell refers to a cell that can cover a very small range in a cellular system.

The virtual server 730 is a general-purpose server, and mounts each digital unit 731 based on a virtual platform for processing a signal received from the wireless unit 710. Each of these digital units 731 is implemented in the form of mounting the respective software, that is, LTE software, HSPA + software, WiMAX software on an open hardware platform. At this time, SDR (Software Defined Radio) technology can be used. Here, the digital unit 731 processes the received baseband signal in three layers, namely L1, L2, and L3. L1 includes an L2 layer including a physical layer, a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a general GTP (General). It is processed in the stage of L3 layer including Tunneling Protocol (S1AP) layer and S1AP (S1 Application Part) layer.

The virtual server 730 is connected to the core system to process wireless digital signals, that is, the MME 200 and the S-GW 400 may be connected directly to the Internet network 600. Here, the core system is composed of elements for responding to a connection with an external network (not shown).

As described above with reference to FIGS. 1 and 2, the base station apparatus 100 and the virtual server 730 control a data offloading connection according to a subscriber profile ID. That is, a predetermined subscriber profile ID (SPID) is directly transmitted to the Internet network 600 to provide a data service. Otherwise, the service provider passes through the S-GW 400 and the P-GW 500. Provides data service by connecting to data network.

Here, a function of directly transferring the data packet to the Internet network 600 without transferring the data packet to the S-GW 400 and the P-GW 500 of the operator network is called a local breakout.

At this time, the base station apparatus 100 is equipped with a platform that supports the local breakout service.

In addition, the virtual server 730 can easily support the local breakout service through the virtual platform.

Then, the base station 100 and the virtual server 700 for controlling the data offloading connection includes a common configuration as shown in FIG.

3 is a block diagram illustrating a configuration of a base station and a virtual server according to an embodiment of the present invention, and briefly illustrates only a configuration for data offloading connection according to an embodiment of the present invention.

Referring to FIG. 3, the base station 100 and the virtual server 700 may include a call connection unit 101, a storage unit 103, a determination unit 105, a local breakout service unit 107, and a data service unit 109. It includes.

The call connection unit 101 receives an initial context request message including the subscriber identification information of the call setup target from the MME 200 and transmits an initial context response message to the MME 200. To complete the call setup.

The storage unit 103 stores subscriber identification information that is a local breakout service target, that is, a subscriber profile ID.

The subscriber profile ID (SPID) is used to control the mobile terminal 1 including information for interworking between different networks, to define camp priorities in the idle mode, Used to control inter-RAT / inter-frequency handover in active mode.

The determination unit 105 determines whether the subscriber identification information of the call setup target is predetermined specific subscriber identification information, that is, subscriber identification information stored in the storage unit 103.

The local breakout service unit 107 establishes a local breakout session with the internet network 600, and directly transmits a data packet transmitted and received with the mobile terminal 1 to the internet network 600. That is, the data packet is delivered locally to the Internet network 600 without being delivered to the S-GW 400 and the P-GW 500 of the operator network.

The local breakout service unit 107 itself includes some functions of the S-GW 400 and the P-GW 500, and the IP allocation function and the Internet without transferring data to the S-GW 400. The local breakout service may be provided by including an IP router function that may be delivered to the network 600.

The data service unit 109 is connected to the Internet network 600 through a carrier network including the S-GW 400 and the P-GW 500 to transmit and receive data packets to and from the mobile terminal 1. Accordingly, the mobile terminal 1 is provided with a data service through a data transmission path via the S-GW 500 and the P-GW 600.

4 is a flowchart illustrating a data offloading connection control method according to an exemplary embodiment of the present invention, which will be described in connection with the configuration of FIG. 3 and using the same reference numerals as in FIG. 3.

Referring to FIG. 4, the call connection unit 101 of the base station 100 and the virtual server 730 receives an initial context request message from the MME 200 (S101).

The determination unit 105 determines whether the subscriber profile ID (SPID) included in the initial context request message received in step S101 is an ID stored in the storage unit 103 (S103).

At this time, in the case of the stored ID, the determination unit 105 determines that the local breakout service target (S105). The call connection unit 101 transmits an initial context response message to the MME 200 (S107) and completes call setup (S109).

Thereafter, the data packet of the SPID received in step S101 is directly transmitted to the Internet network 600 through the local breakout service unit 107 (S111).

On the other hand, if the ID is not stored in step S103, the call connection unit 101 transmits an initial context response (Initial Context Response) message to the MME 200 (S113) to complete the call setup (S115). Thereafter, the data packet of the SPID received in step S101 is transmitted to the S-GW 400 through the data service unit 109 (S117). Then, the S-GW 400 is transmitted to the Internet network 600 through the data path including the P-GW 500.

Here, step S101 and step S107 is an initial context setup procedure, and includes the entire required initial UE context, that is, the E-RAB context, security key, handover restriction list, UE radio possibility, UE security possibility, etc. The purpose is to establish an initial UE context. In the case of the establishment of an E-RAB, the EPC must be prepared to receive user data before the initial context setup response message is received at the MME. If there is no logical SI connection associated with the UE, then the UE related SI connection should be established upon receipt of the initial context setup request message. An initial context setup request message is included within the E-RAB such that setup list information is requested by the eNB to design a new E-RAB configuration that includes at least one additional E-RAB.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (9)

A local breakout service unit connected directly to an internet network to provide a local breakout service for transmitting data to the internet network; And
Determination unit for determining whether to provide the local breakout service by determining whether the subscriber identification information of the call setup target is predefined specific subscriber identification information
Base station device comprising a. The method of claim 1,
A storage unit which stores subscriber identification information which is a target of local breakout service; And
Receiving an initial context request message from the mobility management object, and further comprises a call connection for completing the call setup by sending an initial context response message to the mobility management object,
The determination unit,
And determining whether the subscriber identification information extracted from the initial context request message is subscriber identification information of a local breakout service object stored in the storage. The method of claim 2,
If the subscriber identification information extracted from the initial context request message is not a local breakout service target, data is transmitted to a serving gateway, the serving gateway transmits the received data to the internet network through a packet data network gateway. Service Department
Base station apparatus further comprising. The method of claim 1,
The subscriber identification information,
A base station apparatus which is a subscriber profile ID used to control a mobile terminal by including information for interworking between different networks. A virtual server connected to the core system and processing a wireless digital signal; And
A plurality of wireless units installed in a service area and physically separated from the virtual server, and converting and amplifying a wireless digital signal received from the virtual server,
The virtual server,
A local breakout service unit connected directly to an internet network to provide a local breakout service for transmitting data to the internet network; And
Determination unit for determining whether to provide the local breakout service by determining whether the subscriber identification information of the call setup target is predefined specific subscriber identification information
Virtualized base station system comprising. The method of claim 5,
The virtual server,
A storage unit which stores subscriber identification information which is a target of local breakout service; And
Receiving an initial context request message from the mobility management object, and further comprises a call connection for completing the call setup by sending an initial context response message to the mobility management object,
The determination unit,
And determining whether the subscriber identification information extracted from the initial context request message is the local breakout service target stored in the storage. The method according to claim 6,
If the subscriber identification information extracted from the initial context request message is not a local breakout service object stored in the storage unit, the serving gateway-the serving gateway transmits the received data to the internet network through a packet data network gateway. Data service to send to
Virtualized base station system further comprising. The method according to claim 6,
The plurality of wireless units,
And a virtual base station system installed in the macro cell area to manage the macro cell using high power. The method according to claim 6,
The plurality of wireless units,
Virtualized base station system installed in the femto cell area to manage the femto cell using a small output power.

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