KR20080001229A - Mobile multihop relay system for allocating multi frequency assignment, data transmission method thereby and mobile station therefor - Google Patents

Abstract

An MMR(Mobile Multihop Relay) system for multi FA(Frequency Assignment) allocation, a data transmission method using the system, and a BS(Base Station) therefor are provided to comprise MMR-only FAs for communication between RS(Relay Station) and MS(Mobile Station) sections and between BS and RS sections as well as MS-only FAs for communication between BS and MS sections, thereby increasing capacities between the BS and RS sections in the MMR-only FAs. The first FA allocation unit allocates at least one first FA for direct communication with an MS. The second FA allocation unit allocates at least one second FA for communication with the MS through relay of an RS. Data allocated to the MS is transmitted to the MS by using at least one of the first FA allocation unit and the second FA allocation unit.

Description

Mobile multihop relay system for multi-FA allocation, data transmission method using the same and base station therefor {Mobile Multihop Relay System for Allocating Multi Frequency Assignment, Data Transmission Method Thereby and Mobile Station Therefor}

1 is a conceptual diagram briefly showing a conventional MMR system,

2A is a conceptual diagram illustrating a frame structure of a conventional MMR system using 1 FA;

2b is a conceptual diagram illustrating a frame structure of a conventional MMR system using 2 FA;

3 is a block diagram schematically illustrating an MMR system for 2 FA allocation according to a first embodiment of the present invention;

4 is a flowchart illustrating a data transmission method using an MMR system for 2 FA allocation according to the first embodiment of the present invention;

5 is a flowchart illustrating a data transmission method using an MMR system for 2 FA allocation according to a second embodiment of the present invention;

6A is a conceptual diagram illustrating a frame structure of an MMR system for 2 FA allocation according to the first embodiment of the present invention;

6B is a conceptual diagram illustrating a frame structure of an MMR system for 2 FA allocation according to a second embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

310: BS 312: first FA allocation means

314: second FA allocation means 320: RS

330: MS

The present invention relates to a mobile multihop relay (MMR) system for multi-FA (Frequency Assignment) allocation, a data transmission method using the same, and a base station (BS) for the same. It is called. More specifically, in an MMR system which is a relay communication system in which relay equipment is added to a mobile communication system, the frequency capacity between a BS and a relay device (RS) is increased while 2 MMR system that can improve frequency efficiency and minimize development costs even when operating with multi-FA more than FA, and how to use it and BS for it.

The mobile communication system has been developed through the first generation analog AMPS (Advanced Mobile Phone System) and the second generation cellular (PCS) / personal communication service (PCS). The third generation mobile communication system IMT-2000 (International Mobile Telecommunication 2000), which is enacted as a standard in ITU-R, is commercially available. In addition, a mobile Internet system that can use a high-speed wireless Internet service at a low rate while moving, has emerged.

The portable internet system uses various types of portable terminals such as laptops, PDAs, and handheld PCs to access various types of information and content by accessing the Internet in indoor and outdoor stationary environments and in mobile environments with walking speeds and low to medium speeds. It is a service. In addition, IP-based wireless data system that provides mobility of 60 km / h per hour, provides downlink transmission speed of 24 Mbps, and can provide downlink transmission speed of 50 Mbps by applying Multiple Input Multiple Output (MIMO) system. to be.

In addition, the portable Internet system uses a 2.3 GHz frequency band, and draws a time division duplex (TDD) by a duplex method and a multiple access method to effectively use the allocated frequency spectrum. Orthogonal Frequency Division Multiple Access (OFDMA) is used.

On the other hand, unlike the direct communication method between the base station, i.e., the BS and the terminal, i.e., the MS such as the aforementioned mobile communication system or the portable Internet system, the MMR, which is being standardized in a task group called 'IEEE 802.16j' Relay communication has been proposed.

1 is a conceptual diagram briefly illustrating a conventional MMR system.

In a mobile communication system such as a portable Internet system, a base station, that is, a BS 110, is disposed in a service area to transmit and receive data to and from a terminal, that is, the MS 130, through the BS 110. Accordingly, the MS 130 may transmit / receive data with the BS 110 only when located within the coverage of the BS 110 and when not in the radio shadow area.

That is, when the MS 130 is not located within the coverage of the BS 110 or is located in a coverage area that does not receive radio waves from the BS 110, such as a basement or a building concentrated area even if located within the coverage, the BS 110 and You cannot send or receive data.

In order to solve this problem, in the MMR system, the RS 120 is provided to eliminate the radio shadow area and expand coverage. That is, the MS 130 provides a service by distributing a plurality of RSs 120 within the coverage of the BS 110 so as to receive data from any one of the RSs 120 or the BS 110 arranged in various places. Increase the coverage and transmission speed you can receive.

2A is a conceptual diagram illustrating a frame structure of a conventional MMR system using 1 FA.

The frame structure shown in FIG. 2A is a frame structure divided into a downlink and an uplink when only one FA is allocated to the BS 110. In the case of the downlink, the first block is the frame structure of the BS 110, and the second block is the frame structure of the RS 120.

In the case of the downlink, one FA is a radio resource (time or frequency) to broadcast preamble and Mobile Application Protocol (MAP) information to the BS 110 and the MS from the BS 110. Radio resources for communication to 130 and radio resources for communication from BS 110 to RS 120 are used. In addition, the RS 120 is allocated a radio resource for broadcasting the midamble and map information, and a radio resource for communication from the RS 120 to the MS 130.

For the uplink, one FA is a radio resource for communication from the MS 130 to the BS 110, a radio resource for communication from the MS 130 to the RS 120, and a BS 110 from the RS 120. It is divided into radio resources for communication.

That is, in a typical MMR system, when one FA is used, the BS 110, the RS 120, and the MS 130 share one FA, so that each section, that is, the BS 110 to the RS 120 is used. ), A lot of overhead occurs in the control for communication of the interval between the BS (110) ~ MS (130) section, the RS (120) ~ MS (130) section, BS (110) ~ RS (120) section When using for the purpose of the wireless backhaul (Backhaul), there is a problem that it is difficult to secure sufficient capacity.

2b is a conceptual diagram illustrating a frame structure of a conventional MMR system using 2 FA;

In the MMR system described with reference to FIG. 2A, when two FAs are used by adding one FA, a frame structure may be represented as shown in FIG. 2B. In this case, both BS 110 and RS 120 must have the function of receive (Rx) / transmit (Tx) for 2 FAs. Therefore, there is a problem that the cost is increased to build the system. This is contrary to the direction of MMR, where the MMR system aims to minimize cost increase with coverage expansion and transmission speed improvement.

In order to solve this problem, the present invention, in the MMR system which is a relay communication system in which relay equipment is added to the mobile communication system, even when operating in a multi-FA or more than 2 FA while increasing the frequency capacity between the BS and RS An object of the present invention is to provide an MMR system, a method using the same, and a BS therefor, which can increase frequency efficiency and minimize development costs.

In order to achieve the above object, the present invention includes at least one mobile terminal (MS), and at least one relay device (RS: RS). In a mobile multihop relay (MMR) system, a base station (BS: base station, hereinafter referred to as 'BS') for allocating radio resources to the MS and RS, directly communicates with the MS. First FA assignment means for assigning at least one first Frequency Assignment (FA) for the service; And second FA assigning means for allocating at least one or more second FAs for communicating with the MS via relay of the RS, allocating to the MS using any one or more of the first FA assigning means and the second FA assigning means. Provided BS for multi-FA allocation characterized in that the transmitted data to the MS.

According to another object of the present invention, in a multi-hop relay (MMR) system, direct communication with a mobile station (MS) is referred to. At least one second FA for communicating with the MS via a first FA assignment means for allocating at least one first Frequency Assignment (FA) and a relay of a relay device (RS) And a second FA allocating means for allocating a preamble and a base station for transmitting preamble and MAP information and data allocated to the MS using the first FA and second FA allocating means. (BS: Base Station, hereinafter referred to as 'BS'); An RS receiving the preamble through a second FA from the BS and synchronizing with the BS, receiving the map information from the BS, receiving the data using the map information, and transmitting the received data to the MS; And an MS receiving the preamble through the first FA or the second FA from the BS and synchronizing with the BS, receiving the map information from the BS and optionally receiving data from the BS or RS using the map information, Coverage provides an MMR system for multi-FA allocation, characterized in that it includes coverage of RS.

In addition, according to another object of the present invention, in a multi-hop relay (MMR) system, the mobile terminal (MS: Mobile Station, hereinafter referred to as "MS") in direct communication At least one second for communicating with the MS through a relay of a first FA assignment means and a relay device (RS), which assigns at least one first Frequency Assignment (FA) A second FA assigning means for allocating an FA, and transmitting preamble and MAP information and data allocated to the MS using the first FA assigning means and the second FA assigning means. Base station (BS: hereinafter referred to as 'BS'); Receive the preamble through the second FA from the BS to synchronize with the BS and receive the map information, generate a midamble (Midamble) using the preamble and transmit to the MS, transmit the map information to the MS, data from the BS RS for receiving and forwarding to MS; And an MS receiving the midamble through the second FA from the RS to synchronize with the RS and receiving map information, and optionally receiving data from the BS or the RS using the map information, wherein the coverage of the BS is the coverage of the RS. It provides an MMR system for assigning a multi-FA, characterized in that it does not include.

Further, according to another object of the present invention, at least one mobile terminal (MS), at least one relay device (RS: RS) and a base station In a mobile multihop relay (MMR: Mobile Station) system including a BS (Base Station, hereinafter referred to as 'BS'), when the BS coverage does not include the RS coverage, A method for RS to relay data from BS to MS, the method comprising: (a) receiving a preamble from BS and synchronizing with BS; (b) receiving Mobile Application Protocol (MAP) information from the BS; (c) generating a midamble using the preamble; (d) transmitting the midamble to the MS to synchronize with the MS; (e) sending the map information to the MS; And (f) transmitting the data allocated by the map information to the MS according to the MS's choice, wherein the BS allocates at least one first Frequency Assignment (FA) for direct communication with the MS. It provides a data transmission method using an MMR system for multi-FA allocation, comprising a second FA allocation means for allocating at least one or more second FA for communicating with the MS through the relaying means of the allocation means and RS. .

Further, according to another object of the present invention, at least one mobile terminal (MS), at least one relay device (RS: RS) and a base station In a mobile multihop relay (MMR) system including a BS (Base Station, hereinafter referred to as 'BS'), if the BS's coverage includes the RS's coverage, the BS CLAIMS 1. A method for relaying data from an MS to a MS, the method comprising: (a) a BS transmitting a preamble to an RS and an MS to synchronize with the RS and the MS; (b) the RS receiving Mobile Application Protocol (MAP) information from the BS; (c) the MS receiving map information from the BS; And (d) the MS selectively receiving data from the RS or BS using the map information, wherein the BS assigns at least one first Frequency Assignment (FA) for direct communication with the MS. And a second FA allocating means for allocating at least one or more second FAs for communicating with the MS via relay of the allocating means. to provide.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, in describing a preferred embodiment of the present invention, the coverage of a base station (BS) is referred to as a relay station (RS). A mobile multihop relay (MMR) system for 2 FA allocation when no coverage is included is described as the first embodiment, and the coverage of the BS includes the coverage of the RS. The MMR system for 2 FA allocation in the case will be described as the second embodiment.

3 is a block diagram schematically illustrating an MMR system for 2 FA allocation according to a first embodiment of the present invention.

The MMR system for 2 FA (Frequency Assignment) allocation according to the first embodiment of the present invention includes a BS 310, an RS 320, and a mobile station (MS), 330, 330. do.

BS 310 according to the first embodiment of the present invention is the MS 330 through the relay between the first FA allocating means 312 and RS 320 for allocating a first FA for direct communication with the MS 330 And second FA assigning means 314 for assigning a second FA for communicating with.

In addition, the BS 310 according to the first embodiment of the present invention transmits a preamble including information for synchronizing with the MS 330 using the first FA allocation means to the MS 330. In synchronization with the MS 330, mobile station protocol (MAP) information including information specifying radio resources allocated to data to be transmitted to the MS 330 is transmitted to the MS 330.

In addition, the BS 310 according to the first embodiment of the present invention uses a second FA allocation means to transmit a preamble including information for synchronizing with the RS 320 and the MS 330. 330, and when synchronized with the RS 320 and the MS 330, the MAP (Mobile Application Protocol) information including information specifying radio resources allocated to data to be transmitted to the MS 330 is synchronized. Transmits to the RS 320 and the MS 330 so that the RS 320 receives the corresponding data from the radio resource specified in the map information and relays the data to the MS 330, and the MS 330 according to its selection. Receive the corresponding data from the radio resource specified in the map information from the BS 310 or RS 320.

Here, in the first embodiment of the present invention, since the position of the MS 330 is assumed to be located outside the coverage of the BS 310, the MS 330 does not receive the preamble through the first FA to synchronize with the BS 310. Also, it cannot receive map information, cannot receive preamble from BS 310 through the second FA, and thus cannot synchronize with BS 310 and receive map information. Accordingly, the MS 330 receives map information in synchronization with the RS 320 through the second FA, and receives data allocated to itself from the RS 320 through the second FA.

Accordingly, the BS 310 according to the first embodiment of the present invention communicates directly with the MS 310 through the first FA using the first FA allocation means, and the second using the second FA allocation means. The FA communicates with the MS 330 through a relay of the RS 320. That is, the BS 310 according to the first embodiment of the present invention is an FA dedicated to a section between the BS 310 and the MS 330 for communication with the MS 330 (hereinafter, 'MS dedicated FA' for convenience of description). ) Is used as a first FA, and an FA (hereinafter, referred to as an 'MMR dedicated FA' for convenience of explanation) is used for a BS 310 to RS 320 section and an RS 320 to MS 330 section. ) Is used as the second FA.

That is, as described with reference to Figure 2b, FA of the conventional MMR system, that is, BS (110) ~ RS (120) section, RS (120)-MS (130) section, BS (110)-MS (130) section Rather than using two FAs divided by two, the BS 310 to MS 330 sections are separated, and the first FA is used as the MS dedicated FA in this section, and the other section, that is, the BS 110. The capacity between BS 310 and RS 320 can be increased by using the second FA as the MMR-only FA in the ~ RS 120 section and the RS 120 ~ MS 130 section.

In addition, the BS 310 transmits the preamble to the MS 330 through the first FA allocation means, and transmits the preamble to the RS 320 and the MS 330 through the second FA allocation means. In this case, the MS 330 located within the coverage of the BS 310 may receive the preamble from the BS 310, but the MS 330 located within the coverage of the RS 320 but located outside the coverage of the BS 310 may be removed. The preamble cannot be received from the BS 310 not only through the 1 FA but also through the second FA. Therefore, in the first embodiment of the present invention, since the MS 330 is assumed to be located outside the coverage of the BS 310, in the first embodiment of the present invention, the MS 330 is not only connected to the first FA but also to the second FA. It cannot directly synchronize with the BS 310.

Meanwhile, in order to transmit data allocated to the MS 330 from the BS 310 to the MS 330, the BS 310 and the MS 330 should receive map information in synchronization, but outside the coverage of the BS 310. Since the located MS 330 cannot receive the preamble for synchronizing with the BS 310 and therefore cannot synchronize with the BS 310, the MS 330 located within the coverage of the RS 320 but outside the coverage of the BS 310 is located. Receives map information in synchronization with RS 320 and receives data via RS 320. To this end, as will be described later, the RS 320 generates a midamble by receiving the preamble from the BS 310 and then transmits it to the MS 330.

The RS 320 according to the first embodiment of the present invention has only one reception (Rx) / transmission (Tx) function even in an MMR system using 2 FAs. That is, according to the present invention, as described above, even when using 2 FA in the MMR system, since the first FA is used only in the interval between the BS 310 and the MS 330, the RS 320 is selected from the BS 310. Only the second FA for the RS 320 section and the RS 320 to MS 330 section is used and thus has only one receive (Rx) / transmit (Tx) function. Therefore, according to the present invention, even when 2 FAs are used in the MMR system, the function that the RS 320 should have is simplified, thereby reducing the development cost.

In addition, the RS 320 according to the first embodiment of the present invention is an RS of an MMR system, which receives a preamble from the BS 310 through a second FA, identifies information for synchronization included in the preamble, and uses the same. After synchronizing with the BS 310, map information is received from the BS 310.

In addition, the RS 320 according to the first embodiment of the present invention generates a midamble which is information for synchronizing with the MS 330, transmits the midamble to the MS 330 through the second FA, and synchronizes with the MS 330. If the MS 310 transmits the map information received from the BS 310 to the MS 330, and receives data allocated to the MS 330 from the BS 310 according to the selection of the MS 330. (I.e., designated frequency and time) to the MS 320.

The MS 330 according to the first embodiment of the present invention is an MS of the MMR system, which is located outside the coverage of the BS 310. Accordingly, the MS 330 according to the first embodiment of the present invention receives the midamble from the RS 320 through the second FA, synchronizes with the RS 320 using it, and then maps from the RS 320. Receives the information to be transmitted to itself specified in the map information from the BS 310 through the relay of the RS (320).

Hereinafter, a method of transmitting data to the MS 330 using the MMR system for 2 FA allocation according to the first embodiment of the present invention will be described with reference to FIG. 4.

4 is a flowchart illustrating a data transmission method using an MMR system for 2 FA allocation according to the first embodiment of the present invention.

BS 310 operates the first FA and the second FA through the first FA assignment means 312 and the second FA assignment means 314, respectively. The BS 310 generates and stores map information including a preamble including information for synchronizing with the MS 330 and the RS 320 and information specifying radio resources allocated to data to be transmitted to the MS 330. (S410).

BS 310 first propagates the preamble through the respective FA assignment means 312 and 314, and the preamble is transmitted to RS 320 (S420). That is, since the first embodiment of the present invention is a case where the position of the MS 330 is outside the coverage of the BS 310, the MS 330 may not preamble the BS from the BS 310 through the second FA as well as the first FA. Unreceived, the preamble of BS 310 is transmitted to RS 320 via the second FA.

Receiving the preamble, the RS 320 analyzes the preamble and checks information for synchronization and uses the same to synchronize with the BS 310 (S430), and the BS 310 transmits map information to the synchronized RS 320. Transmit (S440).

Upon receiving the map information, the RS 320 generates a midamble including information for synchronizing with the MS 330 (S450) and transmits the information to the MS 330 (S460). Receiving the midamble, the MS 330 analyzes the midamble and checks information for synchronization and uses the same to synchronize with the RS 320 (S470), and the RS 320 synchronizes the map information to the synchronized MS 330. Transmit (S480).

Upon receiving the map information, the MS 330 analyzes the map information, checks the radio resource to which the data to be transmitted is allocated, and requests the RS 320 to transmit the data accordingly, and the RS 320 again receives the BS. After requesting and transmitting the data to the 310, the MS 330 relays the data to the MS 330, and the MS 330 receives its data (S490).

In the first embodiment of the present invention, the BS 310 generates and transmits a preamble, and after the RS 320 synchronizes with the BS 310 using the preamble, the RS 320 generates a midamble and generates a MS. Although described as being synchronized with the MS 330 by transmitting to 330, the RS 320 generates a midamble using a previous preamble that was previously received even if the RS 320 does not receive the preamble from the BS 310, and the MS 330. And then synchronize with the MS 330, the BS 310 may transmit the preamble to the RS 320 so that the RS 320 may synchronize with the BS 310. That is, the BS 310 transmitting the preamble and the RS 320 transmitting the midamble may change the order as necessary.

In the above description, as shown in FIG. 3 and FIG. 4, when the MS 330 is located outside the coverage of the BS 310 in the MMR system for 2 FA allocation and the system for 2 FA allocation, The data transmission method in the case where the coverage of the BS 310 does not include the coverage of the RS 320 has been described. Hereinafter, as a second embodiment of the present invention with reference to FIG. 5, when the MS 330 is located within the coverage of the BS 310 in the system for 2-FA allocation, that is, the coverage of the BS 310 is determined by the RS 320. A data transmission method in the case of including coverage will be described.

The MMR system for 2 FA allocation according to the second embodiment of the present invention has the same components as the MMR system for 2 FA allocation according to the second embodiment of the present invention described with reference to FIG. The functionality is also the same or similar. However, in the second embodiment of the present invention, since the MS 330 is located within the coverage of the BS 310, that is, the coverage of the BS 310 includes the coverage of the RS 320, It is possible to receive the midamble from the BS 110 via the first FA and the second FA and thus receive the map information from the BS 310 to synchronize with the MS 330 at the RS 320. There is no need to generate a midamble containing the information and there is no need to relay the map information. Therefore, the description of the MMR system for 2 FA allocation according to the second embodiment of the present invention will not be described with reference to the additional drawings, but the description of the data transmission method to be described later with reference to FIG.

5 is a flowchart illustrating a data transmission method using an MMR system for 2 FA allocation according to a second embodiment of the present invention.

BS 310 operates the first FA and the second FA through the first FA assignment means 312 and the second FA assignment means 314, respectively. The BS 310 generates and stores map information including a preamble including information for synchronizing with the MS 330 and the RS 320 and information specifying radio resources allocated to data to be transmitted to the MS 330. (S410).

The BS 310 that generates and stores the preamble and map information transmits the preamble to the MS 330 through the first FA using the first FA allocation means 312, and uses the second FA allocation means 314. In step S520, the preamble is transmitted to the RS 320 and the MS 330 through the second FA. Here, when the BS 310 transmits the preamble through the second FA using the second FA allocation means 314, the BS 310 recognizes the RS 320 in the same manner as the MS 330.

After receiving the preamble from the BS 310 through the first FA, the MS 330 receives the map information from the BS 310 in synchronization with the BS 310, and then transmits data to itself on the radio resource specified in the map information. Receive Since this is the same as in the conventional mobile communication system, a detailed description thereof will be omitted.

Meanwhile, the preamble transmitted through the second FA is transmitted to the RS 320 and the MS 330. The RS 320, which has received the preamble from the BS 310 through the second FA, is used for synchronization included in the preamble. The information is checked and synchronized with the BS 310 (S530), and the BS 310 transmits map information to the synchronized RS 320 (S540).

In addition, the BS 310 generating and storing the preamble and map information transmits the preamble to the MS 330 through the second FA means 314 (S550). Upon receiving the preamble, the MS 330 checks the synchronization information included in the preamble and synchronizes with the BS 310 (S560), and the BS 310 transmits map information to the synchronized MS 320 (S570). ).

On the other hand, Figure 5 and the above description has shown and described that step S550 to step S570 is performed after step S520 to step S540, in fact, BS 310 is the first FA means 312 and the second FA means 314 Simultaneously propagates the preamble to the RS 320 and the MS 330, and the RS 320 and the MS 330 receive map information in synchronization with the BS 310 at the same or similar time, respectively. do.

As described above, after the RS 320 and the MS 330 receive the map information in synchronization with the BS 310, the MS 330 checks the received map information and transmits it to itself according to a preset algorithm. Select the device to receive the data. That is, the MS 330 selectively receives data from the BS 310 or the RS 320 according to a preset algorithm. Here, the predetermined algorithm is to check the map information received by the MS 330, analyze the environment of radio waves received from the BS 310 and RS 320 to select a place with a high transmission speed and a good propagation environment. Say an algorithm.

Accordingly, the MS 330 may receive the data to be transmitted to itself through the relay of the RS 320 to the second FA according to its selection (S580 to S590), and may be allocated to itself from the BS 310. Data may be received by the first FA (S592).

As described above, according to the second embodiment of the present invention, when the coverage of the BS 310 includes the coverage of the RS 320, that is, when the MS 330 is located within the coverage of the BS 310, the MS is located. Since the 330 can receive the preamble from the BS 310 not only through the first FA but also through the second FA and synchronize with the BS 310, and thereby receive map information from the BS 310, the present invention provides the present invention. As in the first embodiment of the present invention, the RS 320 generates a midamble and transmits the midamble to the MS 330, and again transmits map information to the MS 330, thereby reducing overhead in the MMR system.

Hereinafter, the frame structure according to the first embodiment and the frame structure according to the second embodiment will be described with reference to FIGS. 6A and 6B.

6A is a conceptual diagram illustrating a frame structure of an MMR system for 2 FA allocation according to the first embodiment of the present invention.

As shown in the frame structure of the MMR system for 2 FA allocation according to the first embodiment of the present invention, the first FA is the downlink and the uplink (between the BS 310-MS 330) Uplink), and the second FA is used for downlink and uplink in the BS 310 to RS 320 section and the RS 320 to MS 330 section.

Therefore, in the first embodiment of the present invention, since the communication between the BS 310 and the MS 320 intervals that do not require relaying of the RS 320 is used as the first FA, the second FA is an MMR dedicated FA. It can be used as, to secure a larger capacity of the BS 310 to RS 320 in the MMR system.

In addition, since the relaying of the RS 320 is not necessary in the case of the first FA by dividing the first FA and the second FA, the RS 320 receives one Rx / R for relaying through the second FA. Since only the transmission (Tx) function may be provided, even when two FAs are used in the MMR system, the development cost of the RS 320 is reduced, and as a result, the construction cost of the MMR system is reduced.

6B is a conceptual diagram illustrating a frame structure of an MMR system for 2 FA allocation according to a second embodiment of the present invention.

In the case of the second embodiment of the present invention, in addition to the effects described with reference to FIG. 6A, as shown, the RS 320 does not need to generate a midamble and transmit the information to the MS 330, and transmits map information. no need.

That is, since the MS 330 is located within the coverage of the BS 310, the MS 330 can receive the preamble and map information directly from the BS 310 not only through the first FA but also through the second FA. The 330 synchronizes with the BS 310 through the first FA or the RS 320 through the second FA using the preamble received directly from the BS 310 and receives the map information received from the BS 310. By confirming the information designating the radio resource allocated to the data to be transmitted to the user by using, it is possible to select the BS 310 or RS 320 according to a preset algorithm to receive the data. That is, when receiving directly from the BS 310, the data is received through the first FA, and when receiving through the relay of the RS 320, the data is received through the second FA.

As described above, according to the second embodiment of the present invention, when the MS 330 is located within the coverage of the BS 310, the implementation of the RS 320 is simplified, and the overhead of the system is reduced. .

In the above description, it is assumed that 2 FA is used in the MMR system, and as a preferred embodiment of the present invention, the first embodiment and the second embodiment have been described. However, the present invention is not limited to the above embodiment, but can be applied to an MMR system of a multi-FA which has assigned a larger number of FAs.

That is, as described above, as an exemplary embodiment of the present invention, the MMR system uses only two FAs of the first FA and the second FA, but the present invention is not limited thereto. It can also be applied to an MMR system of multiple FAs using two FAs.

For example, when the 3 FA is used in the MMR system, the first FA and the second FA are used as an MS dedicated FA for communication between the BS 310 and the MS 330, and the third FA is a BS ( 310) may be used as an MMR dedicated FA for communication between an interval of RS 320 to RS 320 and an interval between RS 320 and MS 330. When using 4 FAs in an MMR system, the first FA and the second FA may be used. Is used as an MS dedicated FA for communication between the BS 310 to the MS 330, and the third FA and the fourth FA are the BS 310 to the RS 320 and the RS 320 to the MS 330. It may be used as an MMR dedicated FA for communication of a section. That is, as the number of FAs increases, MS-only FAs and MMR-only FAs may be separated and used at appropriate ratios in consideration of capacity and users.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, when a plurality of FAs are used in an MMR system, an MS dedicated FA for communication between BS and MS sections and an MMR dedicated FA for communication between BS and RS sections and RS and MS sections are provided. By providing it, there is an effect that can increase the capacity of the BS to RS interval in the MMR dedicated FA.

In addition, since the RS needs to have a reception (Rx) / transmission (Tx) function only when using an MMR dedicated FA, there is an effect of simplifying the configuration of the RS and reducing the development cost of the RS.

In addition, when the MS is located within the coverage of the BS, since the RS does not need to generate information for synchronization and transmit it to the MS or relay map information, the configuration of the RS can be simplified and the development cost of the RS can be reduced. In addition, there is an effect that can reduce the overhead of the MMR system.

Claims (22)

Mobile Multihop Relay (MMR) including at least one mobile terminal (MS), and at least one relay device (RS: RS) In a base station (BS: hereinafter referred to as 'BS') to allocate radio resources to the MS and the RS in the system (hereinafter referred to as 'MMR') system, First FA assignment means for assigning at least one first Frequency Assignment (FA) for direct communication with the MS; And Second FA allocating means for allocating at least one or more second FAs for communicating with the MS via relay of the RS The BS for multi-FA allocation, comprising: transmitting data allocated to the MS to the MS using at least one of the first FA allocation means and the second FA allocation means. The method of claim 1, wherein the BS is, The preamble is transmitted using the first FA allocation means and the second FA allocation means, and the RS receives the preamble through the second FA, and then synchronizes with the BS using the preamble. And receiving map (MAP: Mobile Application Protocol) information from the BS. The method of claim 1, wherein the BS is, The preamble is transmitted using the first FA allocation means and the second FA allocation means, and the MS synchronizes the BS with the base station using the preamble through the first FA or the second FA. BS for multi-FA allocation, characterized in that receiving MAP (Mobile Application Protocol) information. The method of claim 2, If the coverage of the BS does not include the coverage of the RS, the RS generates a midamble using the preamble and transmits the midamble to the MS through the second FA, and the MS transmits the midamble. Receiving the map information from the RS in synchronization with the RS using the BS for multi-FA allocation. The method of claim 2 or 3, wherein the MS, And selectively receiving the data from the BS or the RS using the map information. The method of claim 1, wherein the preamble, And information for synchronizing with the RS and the MS. The method of claim 4, wherein the midamble, And information for synchronizing with the MS. The method of claim 1, wherein the map information, BS for multi-FA allocation, characterized in that it comprises information for designating a radio resource allocated to the data. In a multi-hop relay (MMR: Mobile Multihop Relay, hereinafter referred to as 'MMR') system, A first FA assignment means and a relay device (RS) for allocating at least one or more first Frequency Assignments (FAs) for direct communication with a mobile station (MS: Mobile Station, hereinafter referred to as 'MS') Second FA assignment means for allocating at least one or more second FAs for communicating with the MS via a relay of &quot; &quot; Preamble (MAP) and a base station (BS) for transmitting Mobile Application Protocol (MAP) information and data allocated to the MS; The RS receiving the preamble through the second FA from the BS and synchronizing with the BS, receiving the map information from the BS, receiving the data using the map information, and forwarding the data to the MS; And Receive the preamble from the BS via the first FA or the second FA to synchronize with the BS, receive the map information from the BS and selectively use the data from the BS or the RS using the map information. MS to receive Wherein, the coverage of the BS includes the coverage of the RS. The method of claim 9, wherein the preamble, MMR system for multi-FA allocation, characterized in that it comprises information for synchronizing with the RS and the MS. The method of claim 9, wherein the map information, MMR system for multi-FA allocation, characterized in that it comprises information for designating a radio resource allocated to the data. In a multi-hop relay (MMR: Mobile Multihop Relay, hereinafter referred to as 'MMR') system, A first FA assignment means and a relay device (RS) for allocating at least one or more first Frequency Assignments (FAs) for direct communication with a mobile station (MS: Mobile Station, hereinafter referred to as 'MS') Second FA assignment means for allocating at least one or more second FAs for communicating with the MS via a relay of &quot; &quot; Preamble (MAP) and a base station (BS) for transmitting Mobile Application Protocol (MAP) information and data allocated to the MS; Receive the preamble through the second FA from the BS to synchronize with the BS and receive the map information, generate a midamble using the preamble, and transmit the midamble to the MS; The RS for transmitting to the MS and receiving the data from the BS and delivering the data to the MS; And An MS receiving the midamble through the second FA from the RS to synchronize with the RS and receiving the map information, and optionally receiving the data from the BS or the RS using the map information Wherein the coverage of the BS does not include the coverage of the RS. The method of claim 12, wherein the preamble, MMR system for assigning a multi-FA, characterized in that it comprises information for synchronizing with the RS and the MS. The method of claim 12, wherein the midamble, MMR system for assigning a multi-FA, characterized in that it comprises information for synchronizing with the MS. The method of claim 12, wherein the map information, MMR system for assigning a multi-FA, characterized in that it comprises information for designating a radio resource allocated to the data. At least one mobile terminal (MS: Mobile Station, referred to as "MS"), at least one relay device (RS: Relay Station, referred to as "RS") and base station (BS: Base Station, referred to as "BS" In a Mobile Multihop Relay (MMR) system including a &quot; MMR &quot;, if the coverage of the BS does not include the coverage of the RS, the RS is transferred from the BS to the MS. In the method of relaying data, (a) receiving a preamble from the BS and synchronizing with the BS; (b) receiving Mobile Application Protocol (MAP) information from the BS; (c) generating a midamble using the preamble; (d) transmitting the midamble to the MS to synchronize with the MS; (e) transmitting the map information to the MS; And (f) transmitting the data allocated by the map information to the MS according to the MS's selection; Wherein the BS comprises at least one first FA assignment means for allocating at least one first Frequency Assignment (FA) for direct communication with the MS and at least one second for communicating with the MS via relay of the RS. And a second FA allocating means for allocating an FA. The method of claim 16, wherein the preamble, And information for synchronizing with the RS and the MS. The method of claim 16, wherein the midamble, And a data for synchronizing with the MS. The method of claim 16, wherein the map information, And information specifying radio resources allocated to the data. At least one mobile terminal (MS: Mobile Station, referred to as "MS"), at least one relay device (RS: Relay Station, referred to as "RS") and base station (BS: Base Station, referred to as "BS" In a Mobile Multihop Relay (MMR) system, which includes the coverage of the RS, relaying data from the BS to the MS when the coverage of the BS includes the coverage of the RS. In the method, (a) the BS transmitting a preamble to the RS and the MS to synchronize with the RS and the MS; (b) the RS receiving Mobile Application Protocol (MAP) information from the BS; (c) the MS receiving the map information from the BS; And (d) the MS selectively receiving the data from the RS or the BS using the map information Wherein the BS comprises at least one first FA assignment means for allocating at least one first Frequency Assignment (FA) for direct communication with the MS and at least one second for communicating with the MS via relay of the RS. And a second FA allocating means for allocating an FA. The method of claim 20, wherein the preamble, And information for synchronizing with the RS and the MS. The method of claim 20, wherein the map information, And information specifying radio resources assigned to the data.

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