KR20140015000A - System and method for control of radio resources selection - Google Patents

Abstract

A terminal receives broadcasted system information from a first base station interlocked with the terminal in order for a control system to control radio resources of the terminal, and whether a transmission method for providing a service requested based on service type information included in a service request signal inputted by a user and a transmission method which the first base station provides are same or not is confirmed. If the transmission method is different from the transmission method which the first base station provides, a network access procedure for a second base station having a service type of a transmission method for being overlapped with a service area of the first base station and providing the service is performed. A service requested by the second base station is provided for a user. [Reference numerals] (AA) First base station; (BB) Control system; (CC) Yes; (DD) No; (EE) Second base station; (S100,S108) Set the connection of a network; (S101) System information; (S102) Obtain and store the system information; (S103) Receive a service request signal; (S104) Check the connection network; (S105) Services available?; (S106,S110,S111) Provide a service; (S107) Determine to connect to a new base station; (S109) Service request

Description

TECHNICAL FIELD [0001] The present invention relates to a radio resource selection control system and method,

The present invention relates to a radio resource selection control system and method of a terminal.

When a UE uses a service in a frequency division duplex (FDD) / time division duplex (TDD) integrated network operated using a policy server, the UE selects an FDD / TDD network from the policy server whenever a UE requests a radio access bearer. Do the work. In this case, the policy server must deliver the random access related parameter to the terminal for network transition of the terminal. Therefore, there is a problem in that a time for network transition of the terminal is delayed and signaling overhead occurs.

Accordingly, the present invention provides a system and method for selectively controlling radio resources of a terminal according to the amount of up / down traffic.

According to another aspect of the present invention, there is provided a method of controlling a radio resource of a terminal,

The terminal interworking with a first base station and receiving system information broadcasted from the interworking first base station; Checking whether a transmission scheme for providing the requested service and the first base station or the transmission scheme are the same based on service type information included in the service request signal input by the user; Performing a network access procedure to a second base station overlapping a service area of the first base station and having a service type of a transmission method for providing the service, if different from a transmission scheme provided by the first base station; And receiving the requested service from the second base station and providing the requested service to the user.

The system information includes information indicating that a service in which a terminal is located can provide a service through a first transmission scheme and a second transmission scheme, uplink / downlink cell bandwidth information, uplink / downlink configuration information, and random access. It may include one or more information of service type information including parameters, uplink power control, and transmission scheme information for providing a service.

The service type information may include information on any one of a symmetric service and an asymmetric service.

In checking whether the transmission scheme is the same, if the service type information of the first base station and the transmission scheme for providing the requested service are the same, the requested service is received through the first base station to the terminal. Providing a step may include.

According to another aspect of the present invention, there is provided a system for controlling radio resources of a terminal located in an area of a first base station and a second base station,

The first base station provides a service in a first transmission scheme, the second base station provides a service in a second transmission scheme, and system information broadcasted from a base station with which the terminal interworked with the first base station or the second base station. A cell information obtaining unit obtaining the cell information; A service request receiving unit receiving a service request signal including service type information input by a user; And a service providing unit providing a service to the terminal based on system information received by the cell information obtaining unit and service type information included in the service request signal received by the service request receiving unit.

The control system determines whether the base station connected to the terminal can provide the service requested by the user to the terminal based on the service type information received by the service request receiving unit, and the terminal provides the service type information. It may include an access network confirmation unit for determining a network connection to the base station providing a service based on.

The first transmission method or the second transmission method may be any one of a frequency division duplex (FDD) transmission method and a time division duplex (TDD) transmission method, and the terminal may provide a dual mode terminal.

According to the present invention, since the UE can select a radio resource for each service and directly determine the network transition according to the uplink / downlink load of the network, time and signaling for network transition can be reduced.

1 is an exemplary diagram illustrating a communication system environment according to an embodiment of the present invention.
2 is a structural diagram of a control system according to an embodiment of the present invention.
3 is a flowchart illustrating a method of selecting a radio resource 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 order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

In this specification, a terminal includes a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS) An access terminal (AT), and the like, and may include all or some of functions of a mobile terminal, a subscriber station, a mobile subscriber station, a user equipment, and the like.

In this specification, a base station (BS) is an access point (AP), a radio access station (RAS), a node B, a base transceiver station (BTS) Mobile Multihop Relay) -BS, and may include all or some of the functions of an access point, a radio access station, a Node B, a base transceiver station, and an MMR-BS.

Hereinafter, a system and a method for selectively controlling radio resources of a UE according to an embodiment of the present invention will be described with reference to the drawings.

1 is an exemplary diagram illustrating a communication system environment according to an embodiment of the present invention.

As shown in FIG. 1, in the embodiment of the present invention, the terminal 100 provides an area for providing a service by using an FDD transmission method (hereinafter, also referred to as an 'FDD network') and an area providing a service by using a TDD transmission method (hereinafter, referred to as FIG. 1). , Also referred to as a 'TDD network', is located in a coexisting network, and receives a service through interworking with the base stations 300-1 and 300-2. At this time, the terminal 100 can receive the service through both the FDD transmission method and the TDD transmission method to the dual mode terminal.

The base stations 300-1 and 300-2 interoperate with the virtualization server 200, and the virtualization server 200 may monitor a service provided to the terminal 100 through an FDD network or a TDD network. The terminal 100 selectively selects one of an FDD network and a TDD network based on a type of service to be provided to a user and system information received from the base stations 300-1 and 300-2 to which the terminal 100 is connected. Connect with Here, it is assumed that the base station forming the FDD network is the first base station 300-1 and the base station forming the TDD network is the second base station 300-2.

The structure of the control system 400 that can selectively access the network according to the type of service that the terminal 100 intends to provide to the user in the FDD / TDD coexistence network will be described with reference to FIG. 2. In the exemplary embodiment of the present invention, the control system 400 is described as an example included in the dual mode terminal 100, but is not necessarily limited thereto. For the convenience of description, the control system 400 will be described when describing the function of the terminal 100.

2 is a structural diagram of a control system according to an embodiment of the present invention.

As shown in FIG. 2, the control system 400 includes a cell information obtaining unit 410, a service request receiving unit 420, an access network checking unit 430, and a service providing unit 440.

The cell information acquisition unit 410 obtains broadcast cell information, that is, system information transmitted through a BCCH (Broadcast Control Channel) from the base stations 300-1 and 300-2 to which the terminal 100 is connected. Here, the terminal 100 is a terminal 100 that obtains physical layer identification information and finds cell frame timing through a synchronization procedure with the base stations 300-1 and 300-2.

The method of finding the physical layer identification information and the cell frame timing is already known, and detailed description thereof will be omitted in the exemplary embodiment of the present invention. The system information includes information indicating that a service is available through a TDD transmission scheme and an FDD transmission scheme in a corresponding cell where the terminal 100 is located, uplink / downlink cell bandwidth information, and a base station to which the terminal 100 is connected. When providing a service by the transmission method includes uplink / downlink configuration information, random access related detailed parameters, uplink power control and service type (symmetric / asymmetric) information provided by the base station. In the embodiment of the present invention, a detailed description of each information will be omitted.

The service request receiver 420 receives a service request signal input by a user. The service type information included in the service request signal is determined. The service type information is classified into a symmetric service and an asymmetric service according to the type of service.

The symmetric service can allocate uplink / downlink resources equally, and it can be exemplified by mVoIP, video phone, e-mail, game, and the like, which are mobile Internet telephones. The asymmetric service can allocate more resources to the downlink, for example, a video on demand (VOD) service, a broadcast service, or an internet service.

The access network checking unit 430 checks whether the transmission scheme for providing the service from the base station to which the terminal 100 is currently connected and the transmission scheme for providing the service received by the service request receiver 420 are identical. The terminal 100 is located in a region where a cell region forming an FDD network formed by the first base station 300-1 and a cell region forming a TDD network formed by the second base station 300-2 overlap each other. Since the terminal 100 accesses the network in connection with any one of the first base station 300-1 or the second base station 300-2 when the terminal 100 accesses the first network, the network provides a service requested by the user. A difference may occur in a network to which the terminal 100 is currently connected.

Accordingly, the access network checking unit 430 determines whether the service according to the service request signal received from the service request receiving unit 420 is the same as the transmission scheme for providing a service from the base station to which the terminal 100 is connected. 430 confirms. If the network to which the terminal 100 is currently connected is not a network providing a service as a transmission method for providing a service requested by the user, the access network checking unit 430 instructs access to the network.

For example, if the service requested by the user is a symmetric service using a video telephone, that is, an FDD network while the terminal 100 is connected to the second base station 300-2 forming the TDD network, the access network is confirmed. The unit 430 requests to access the area of the first base station 300-1 from the area of the second base station 300-2. This is because the cell information acquisition unit 410 stores system information broadcast from the base station after the access procedure with the base station, so that the terminal 100 can know what service is available in the corresponding area.

If the service provider 440 confirms that the terminal 100 is connected to the network providing the service in the same transmission method as the transmission method of the service requested by the user, the service network receiving unit 440, the service request receiving unit The service request signal received by 420 is transmitted to the base station, so that the service can be provided to the user.

A method of selecting a radio resource of the terminal 100 through the control system 400 described above will be described with reference to FIG. 3. In the embodiment of the present invention, for convenience of explanation, it is assumed that the terminal 100 first accesses the first base station 300-1 serving as an FDD and provides a VOD service at the request of the user But it is not necessarily limited thereto.

3 is a flowchart illustrating a method of selecting a radio resource according to an embodiment of the present invention.

As shown in FIG. 3, the terminal 100 including the control system 400 performs a network connection procedure with the first base station 300-1 and accesses the first base station 300-1 (S100). ). The network access procedure between the terminal 100 and the first base station 300-1 is already known, and detailed description thereof will be omitted in the exemplary embodiment of the present invention.

When the terminal 100 is connected to the first base station 300-1, the first base station 300-1 broadcasts system information to all terminals 100 in the cell through the BCCH (S101). The system information includes information indicating that a service is available through a TDD transmission scheme and an FDD transmission scheme in a corresponding cell where the terminal 100 is located, uplink / downlink cell bandwidth information, and uplink / downlink configuration in the case of TDD. Information, detailed information related to random access, uplink power control, and service type (symmetrical / asymmetrical) information.

The cell information acquisition unit 401 receives and stores system information broadcast in step S102 (S102). Through this procedure, the terminal 100 confirms that it can use the service by using any one of a TDD transmission scheme and an FDD transmission scheme.

Thereafter, when the user selects a service to be used through his terminal 100, the service request receiving unit 420 of the control system 100 receives a service request signal (S104). The service request signal includes the type of service.

The access network confirming unit 430 confirming the service type information included in the service request signal confirms the information of the network currently accessed by the terminal 100 (S104), and a transmission method and a terminal for providing a service requested by the user. It is checked whether the transmission scheme provided by the base station to which the 100 is connected is the same (S105). That is, in the embodiment of the present invention, since the terminal 100 first accesses the first base station 300-1 providing the service by the FDD transmission method, and uses the VOD service at the user's request, the access network is confirmed. The unit 430 confirms that the transmission scheme provided by the first base station 300-1 to which the terminal 100 is connected is different from the transmission scheme for providing a service requested by the user.

Therefore, in order to provide a VOD service, which is an asymmetric service, to the user, it is confirmed that accessing the second base station 300-2 to provide a service is efficient. Since the terminal 100 already knows that it is in an area where the service can be used in any one of FDD and TDD, the access network checker 430 determines the network access to the second base station 300-2. (S107). In operation S108, a network access procedure with the second base station 300-2 is performed. If the terminal 100 is initially connected to the second base station 300-2 providing the asymmetric service, the terminal 100 provides the VOD service to the user through the second base station 300-2 (S106).

When the terminal 100 is connected to the second base station 300-2 through a network access procedure with the second base station 300-2 through step S108, the service provider 440 may transmit the second base station 300-2. Request to provide a VOD service (S109). When the second base station 300-2 receives the request from the service provider 440, the second base station 300-2 provides the VOD service to the service provider 440 (S110), and the service provider 440 provides the VOD to the user who requested the service. Provide a service (S111).

In this way, the terminal 100 selects a radio resource using the data amount or service type and system information received from the base station, thereby preventing overload of the server providing the service and improving the transmission speed of the network.

In the embodiment of the present invention, the terminal 100 is located in an area in which a service can be provided by using both FDD and TDD. However, when the terminal 100 is located in an area for providing a service in any one of the FDD scheme and the TDD scheme, the terminal 100 may provide both the symmetric service and the asymmetric service in either the FDD scheme or the TDD scheme. .

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 method of controlling a radio resource of a terminal in a control system,
The terminal interworking with a first base station and receiving system information broadcasted from the interworking first base station;
Checking whether a transmission scheme for providing the requested service and the first base station or the transmission scheme are the same based on service type information included in the service request signal input by the user;
If different from a transmission scheme provided by the first base station, performing network access to a second base station overlapping a service area of the first base station and having a service type of a transmission scheme for providing the service; And
Receiving the requested service from the second base station and providing the requested service to the user
The radio resource control method comprising: The method of claim 1,
The system information includes information indicating that a service in which a terminal is located can provide a service through a first transmission scheme and a second transmission scheme, uplink / downlink cell bandwidth information, uplink / downlink configuration information, and random access. And at least one of service type information including parameters, uplink power control, and transmission scheme information for providing a service. 3. The method of claim 2,
The system information is a radio resource control method of the information broadcasted in the first base station via a Broadcast Control Channel (BCCH). The method of claim 1,
Wherein the service type information is information on a service type of either a symmetric service or an asymmetric service. The method of claim 1,
In the step of verifying that the transmission schemes are identical,
If the service type information of the first base station and the transmission scheme for providing the requested service are the same, receiving the requested service through the first base station and providing the requested service to the terminal;
The radio resource control method comprising: A system for controlling radio resources of a terminal located in a region of a first base station and a second base station,
Wherein the first base station provides a service in a first transmission scheme and the second base station provides a service in a second transmission scheme,
A cell information acquisition unit for acquiring system information broadcasted from a base station to which the terminal interworked among the first base station and the second base station;
A service request receiving unit receiving a service request signal including service type information input by a user; And
A service provider for providing a service to the terminal based on the system information received by the cell information acquisition unit and service type information included in the service request signal received by the service request receiver.
≪ / RTI > The method according to claim 6,
The base station to which the terminal is connected can provide the service requested by the user to the terminal based on the service type information received by the service request receiver, and the terminal provides the service based on the service type information. Access network confirmation unit for determining network access to the base station
≪ / RTI > The method of claim 7, wherein
The service type information includes information of any one of a symmetric service and an asymmetric service. The method of claim 6, wherein
Wherein the first transmission scheme or the second transmission scheme is one of a Frequency Division Duplex (FDD) transmission method and a TDD (Time Division Duplex) transmission method, and the terminal is a dual mode terminal.

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