KR20090102320A - Apparatus and method for resource allocation in mobile communication system - Google Patents

Abstract

PURPOSE: A resource allocation apparatus and a method thereof in a mobile communication system are provided to distribute a load in each frequency, thereby avoiding an unnecessary frequency interval or movement between base stations. CONSTITUTION: A method of operating a base station in a mobile communication system comprises the following steps. A frequency band for receiving and analyzing a MAP is assigned to terminals. All resource information of the terminals is prepared in the MAP. The MAP is transmitted to each terminal through an assigned frequency band. In the mobile communication system, a device of the base station includes an MAP preparation part, a controller, and a communication unit.

Description

Resource allocation method and device in mobile communication system {APPARATUS AND METHOD FOR RESOURCE ALLOCATION IN MOBILE COMMUNICATION SYSTEM}

The present invention relates to a method and apparatus for allocating resources in a mobile communication system, and more particularly, to a method and apparatus for managing a MAP for a variable bandwidth service in a mobile communication system.

In general, communication systems have been developed mainly for voice services, and are gradually developing into communication systems capable of not only voice but also data services and various multimedia services. The voice-oriented communication system has a relatively small transmission bandwidth and a high usage fee, and thus does not satisfy a rapidly increasing demand for users. In addition, due to the development of the communication industry and increasing user demand for Internet services, there is an increasing need for a communication system capable of efficiently providing Internet services. Accordingly, it has been introduced into a broadband wireless communication system for efficiently providing Internet services.

Since the broadband wireless communication system uses Orthogonal Frequency Division Multiplexing / Orthogonal Frequency Division Multiple Access (OFDMA), high-speed data transmission is achieved by transmitting a physical channel signal using a plurality of sub-carriers. It is possible. The wireless access method of the broadband wireless communication system is being standardized by the IEEE 802.16 standardization group of the Institute of Electrical and Electronics Engineers, one of the international standardization organizations.

In order to freely allocate uplink / downlink in various forms in the OFDM / OFDMA-based broadband wireless communication system, the base station transmits information describing resource allocation of uplink / downlink every frame. In the IEEE 802.16 series system, the MAP message plays this role.

In the broadband wireless communication system, unlike a conventional communication system that services only terminals that support the same frequency width, a system for allowing multiple terminals to use different frequency widths has been proposed to increase frequency efficiency.

When the plurality of terminals use the same bandwidth, only the MAP message of Frequency Allocation (hereinafter referred to as 'FA') is checked for each terminal to determine which resource is allocated to which resource and to which resource. Able to know.

However, when terminals using various bandwidths exist in the same base station, it is important to efficiently transmit resource allocation information from the base station to the terminal.

1 illustrates a structure for managing resource allocation information in a mobile communication system according to the related art.

FIG. 1A illustrates a structure in which one FA manages all resource allocation information. Referring to FIG. 1A, all resource allocation information exists in one FA, and all terminals The MAP information of one FA may be read and respective data may be received or transmitted.

However, when reading MAP information of one FA and receiving or transmitting respective data, all terminals are concentrated in one FA, so resource utilization of FA_0 may be inefficient, and each terminal moves to a different FA each time. Since there is a need for decoding, there is a problem in that implementation may be difficult.

In order to solve the above problems, each FA independently proposes a resource allocation scheme.

(B) of FIG. 1 is a structure in which each FA independently manages resource allocation information in the mobile communication system. Referring to FIG. 1 (b), the base station uses only information corresponding to the MAP message of each FA. The terminal receives and interprets all the MAP messages, and if the corresponding information exists, the terminal receives or transmits the corresponding resource.

However, in this case, since each terminal must interpret all FAs regardless of resource allocation or not, there is an inefficient problem by consuming unnecessary energy and process resources of the terminal.

 An object of the present invention is to provide a resource allocation method and apparatus in a mobile communication system.

Another object of the present invention is to provide a method and apparatus for a variable bandwidth service in a mobile communication system.

Another object of the present invention is to provide a method and apparatus for managing MAP for variable bandwidth service.

According to a first aspect of the present invention for achieving the above object, a method of operating a base station in a mobile communication system, the process of allocating a frequency band for receiving and analyzing the MAP to a plurality of terminals, and the plurality of terminals in the MAP And preparing all resource information of the MAP and transmitting the MAP to each terminal through the allocated frequency band.

According to a second aspect of the present invention for achieving the above object, a method of operating a terminal in a mobile communication system, the process of receiving one frequency band for MAP reception and analysis from the base station, and from the allocated frequency band And receiving and interpreting the MAP, and transmitting and receiving data through the resources allocated to the MAP.

According to a third aspect of the present invention for achieving the above objects, an apparatus of a base station in a mobile communication system, a MAP preparation unit for writing all the resource information of the plurality of terminals in the MAP, MAP reception and A control unit for allocating a frequency band for analysis and controlling a function of transmitting a MAP created by the MAP creating unit to each terminal through the allocated frequency band, and a communication unit transmitting the MAP by the control unit. It features.

According to a fourth aspect of the present invention for achieving the above objects, a device of a terminal in a mobile communication system receives and interprets one frequency band for receiving and interpreting a MAP from a base station and through a resource allocated to the MAP. And a control unit for controlling a function for transmitting and receiving data, a MAP analysis unit for receiving and analyzing a MAP from a frequency band allocated by the control of the control unit, and a process communication unit for transmitting and receiving data under control of the control unit. It features.

As described above, the present invention allocates only a frequency band for MAP reception and interpretation to a terminal when allocating resources in a mobile communication system so that the terminal receives and interprets the MAP through one or more bands by the information of the MAP. By transmitting and receiving data, it is not necessary to check other frequencies for transmitting and receiving data, and by distributing the load on each frequency, unnecessary movement between frequencies or base stations can be avoided. In addition, when changing the frequency band to be used for data transmission and reception of the terminal in the base station, by changing only the information assigned to the MAP there is an effect that no additional procedure is required.

1 is a diagram illustrating a structure for managing resource allocation information in a mobile communication system according to the prior art;

2 is a block diagram of a base station for resource allocation in a mobile communication system according to the present invention;

3 is a block diagram for transmitting and receiving data with allocated resources in a terminal of a mobile communication system according to the present invention;

4 is a diagram illustrating a procedure of a base station for resource allocation in a mobile communication system according to an embodiment of the present invention.

5 is a diagram illustrating a procedure for transmitting and receiving data with an allocated resource in a terminal of a mobile communication system according to an embodiment of the present invention; and

6 is a diagram illustrating a structure for managing resource allocation information in a mobile communication system according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, the present invention allocates only a frequency band for MAP reception and analysis to a terminal when allocating resources in a mobile communication system so that the terminal receives and interprets the MAP, and transmits and receives data through one or more bands based on the MAP information. A method and apparatus will be described.

2 is a block diagram of a base station for resource allocation in a mobile communication system according to the present invention.

Referring to FIG. 2, the base station includes a control unit 200, a MAP preparation unit 202, and a communication unit 204.

The controller 200 performs resource scheduling using channel information (eg, CQI (Channel Quality Information)), service type (or QoS), etc. for each terminal (or connection), and creates a MAP of the resource scheduling result. The function provided to the unit 202 is controlled and processed. Here, the resource scheduling result is all resource information corresponding to the frequency band allocated to each terminal, and the base station allocates one or more resources to the terminal in consideration of the data to be transmitted and the data to be received when transmitting and receiving data to the terminal. can do.

In addition, the controller 200 controls a function of allocating a frequency band for MAP reception and analysis to a plurality of terminals and transmitting the MAP in the allocated frequency band, and thus, the scheduling result, that is, the MAP preparing unit 202. According to the control function for transmitting and receiving data through the resources allocated to each terminal. Here, the allocation of the frequency band for the MAP reception and analysis may be allocated by the base station evenly distributed to the frequency band, or may select the terminal according to the state of the base station, that is, the MAP reception of each terminal The allocation of the frequency band for the mobile station may be automatically determined according to a predetermined protocol between the terminal and the base station, or a frequency band for MAP reception may be arbitrarily allocated to each terminal as a message generated at the base station.

The MAP preparing unit 202 creates a frequency band allocated to each terminal, i.e., all resource information allocated to each terminal, in the MAP every frame under the control of the controller 200. The MAP is a message for notifying a result of dynamically allocated resources.

The communication unit 204 performs a function of transmitting and receiving a radio signal of data input and output through an antenna under the control of the control unit 200. For example, in the case of transmission, a baseband signal obtained by channel coding and spreading data to be transmitted is converted into an RF signal and transmitted through an antenna. In case of reception, the RF signal is converted into a baseband signal, and the baseband signal is despreaded and channel de-coded to restore data. In addition, the communication unit 204 transmits the created MAP to each terminal, and transmits and receives data in a frequency band allocated to each terminal according to the information of the MAP.

3 is a block diagram for transmitting and receiving data with allocated resources in a terminal of a mobile communication system according to the present invention.

Referring to FIG. 3, the terminal includes a control unit 300, a MAP analysis unit 302, and a communication unit 304.

The controller 300 receives a MAP from the allocated frequency band and outputs the MAP to the MAP analyzer 302 when the frequency band for MAP reception and analysis is allocated from the base station, and outputs the MAP to the MAP analyzer 302. Control and process the function of transmitting and receiving data with the base station through the resource information assigned to the terminal. In addition, the controller 300 waits for receiving the MAP when there is no resource allocated to the terminal itself in the received MAP.

The MAP analysis unit 302 analyzes the MAP received by the control of the control unit 300 and provides the control unit 300 with resource information allocated to the corresponding terminal.

The communication unit 304 performs a function of transmitting and receiving a radio signal of data input and output through an antenna under the control of the control unit 300. For example, in the case of transmission, a baseband signal obtained by channel coding and spreading data to be transmitted is converted into an RF signal and transmitted through an antenna. In case of reception, the RF signal is converted into a baseband signal, and the baseband signal is despreaded and channel de-coded to restore data.

In addition, the communication unit 304 receives the MAP from one frequency band for MAP reception and analysis at the base station and outputs the MAP to the MAP analysis unit 302, and the MAP information analyzed from the MAP analysis unit 302. Transmits and receives data in the allocated frequency band.

4 illustrates a procedure of a base station for resource allocation in a mobile communication system according to the present invention.

Referring to FIG. 4, first, the base station allocates a frequency band for MAP analysis to each terminal in step 401, and proceeds to step 403 to create all resource information of the corresponding terminal in the MAP according to the resource scheduling result.

In step 405, the base station transmits the created MAP to each terminal through the allocated frequency band. In step 407, the base station transmits and receives data using resources allocated to each terminal by the information of the MAP.

Thereafter, the base station checks whether an allocated resource change event of the terminal occurs in step 409 and terminates the algorithm according to the present invention if the allocated resource change event of the terminal does not occur.

On the other hand, when the frequency band change event of the terminal occurs, the process proceeds to step 411 to change the resource allocation to the MAP and returns to step 405 to perform the following steps again.

In the above description, the base station always transmits the MAP to allocate resources to the terminal. However, according to an implementation, the base station may allocate resources to the terminal only with the system message of the base station without sending the MAP.

5 illustrates a procedure for transmitting and receiving data with allocated resources in a terminal of a mobile communication system according to the present invention.

Referring to FIG. 5, if the terminal is allocated a frequency band for MAP analysis from the base station in step 501, the terminal proceeds to step 503 and checks whether MAP is received from the allocated frequency band. In this case, the terminal receives a MAP only from the allocated one frequency band as shown in FIG. 6 and transmits and receives data through one or more resources allocated through the MAP.

If the MAP is received from the allocated frequency band, the terminal interprets the received MAP in step 505 and proceeds to step 507 to check whether its own resource is allocated to the received MAP. If the terminal's own resource is not allocated to the received MAP, the terminal waits for MAP reception in step 511 and returns to step 503 to perform the following steps again.

Meanwhile, if the terminal's own frequency band is allocated to the received MAP, the terminal proceeds to step 509 and transmits and receives data in the allocated frequency band and terminates the algorithm according to the present invention.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

Claims (18)

In the method of operation of a base station in a mobile communication system, Allocating frequency bands for MAP reception and analysis to a plurality of terminals; Creating all resource information of the plurality of terminals in a MAP; And transmitting the MAP to each terminal through the allocated frequency band. The method of claim 1, The MAP, And a message for notifying a result of dynamically allocated resources. The method of claim 1, The process of allocating a frequency band for MAP reception and analysis to the plurality of terminals, And allocating to the base station in a frequency band. The method of claim 1, The process of allocating a frequency band for MAP reception and analysis to the plurality of terminals, And selecting the terminal according to a state of the base station and a frequency allocation (FA). The method of claim 1, And retransmitting by changing a resource allocation of the MAP when a frequency band of at least one terminal of the plurality of terminals is changed. The method of claim 1, When all resource information of the plurality of terminals is written in the MAP of the allocated frequency band, At least one or more resources are allocated to each terminal in consideration of data to be transmitted and data to be received when data is transmitted and received with each terminal. In the method of operation of a terminal in a mobile communication system, Receiving a frequency band for MAP reception and interpretation from a base station, Receiving and analyzing a MAP from the allocated frequency band; And transmitting and receiving data through the resource allocated to the MAP. The method of claim 7, wherein The MAP, And a message for notifying a result of dynamically allocated resources. The method of claim 7, wherein If no resources are allocated to the MAP, Waiting to receive another MAP. A device of a base station in a mobile communication system, A MAP creating unit for writing all resource information of the plurality of terminals in a MAP; A control unit for allocating frequency bands for MAP reception and analysis to a plurality of terminals and controlling a function of transmitting a MAP created by the MAP creating unit to each terminal through the allocated frequency bands; And a communication unit for transmitting the MAP by the control unit. The method of claim 10, The MAP, And a message for notifying a result of dynamically allocated resources. The method of claim 10, Frequency band allocation for receiving and analyzing the MAP, The base station distributes the frequency bands and allocates. The method of claim 10, Frequency band allocation for receiving and analyzing the MAP, And select the terminal according to a state of the base station and a frequency allocation (FA). The method of claim 10, The control unit, If the frequency band of at least one of the plurality of terminals is changed, retransmit by changing the resource allocation of the MAP. The method of claim 10, When all resource information of the plurality of terminals is written in the MAP, And at least one resource is allocated to each terminal in consideration of data to be transmitted and data to be received when data is transmitted and received with each terminal. In the device of the terminal in a mobile communication system, A control unit which receives and analyzes one frequency band for MAP reception and analysis from a base station and controls a function for transmitting and receiving data through the resources allocated to the MAP; MAP analysis unit for receiving and analyzing the MAP from the frequency band assigned by the control of the control unit; And transmitting / receiving data under the control of the controller. The method of claim 16, The MAP, And a message for notifying a result of dynamically allocated resources. The method of claim 16, The control unit, If there is no resource allocated to the MAP, the device, characterized in that waiting for receiving another MAP.