KR20080081118A - Method and apparatus for ranging in ofdm/ofdma communication system - Google Patents

Abstract

An apparatus and a method for ranging in an OFDM/OFDMA communication system are provided to allocate ranging opportunities dynamically and to implement more efficient communication in a communication network comprising relay stations. A BS(Base Station) transmits a UL(Uplink)-MAP to a terminal, such as an RS(Relay Station) and an MS(Mobile Station), including terminal capability information(S510). In this case, the BS uses a UIUC(Uplink Information Usage Code) in order to add the terminal capability information to the UL-MAP. Receiving the UL-MAP, the terminal reads the UIUC of the UL-MAP while executing ranging(S520). In case the terminal is a terminal corresponding to the terminal capability information contained in the UL-MAP, the terminal transmits a ranging code to the BS(S530).

Description

Method and apparatus for ranging in OFDM / OFDMA communication system {Method and apparatus for ranging in OFDM / OFDMA communication system}

1 schematically illustrates a general IEEE 802.16 communication system structure.

2 schematically illustrates a frame structure of an OFDMA communication system.

3 schematically illustrates a communication procedure of a broadband wireless access communication system.

4 shows the message flow of three different contention-based CDMA code rangings.

5 is a flowchart illustrating one embodiment of a method for an OFDM / OFDMA communication system according to the present invention.

6 is a block diagram illustrating a configuration of an embodiment of a ranging code transmission apparatus for ranging in an OFDM / OFDMA communication system according to the present invention.

7 is a block diagram illustrating a configuration of an embodiment of a transmission device for ranging in an OFDM / OFDMA communication system according to the present invention.

8 is a flowchart illustrating another embodiment of a method for ranging in an OFDM / OFDMA scheme communication system according to the present invention.

9 is a block diagram illustrating a configuration of another embodiment for ranging of an OFDM / OFDMA communication system according to the present invention.

10 is a block diagram illustrating a configuration of another embodiment of an apparatus for ranging in an OFDM / OFDMA communication system according to the present invention.

11 shows a procedure of processing messages for ranging in a network considering a relay station.

The present invention relates to a wireless communication system, and more particularly, to an apparatus and method for ranging in a communication system supporting the OFDM / OFDMA scheme.

The Institute of Electrical and Electronics Engineers (IEEE) 802.16 communication system performs ranging by performing a ranging operation between a terminal and a base station. Rangings used in the IEEE 802.16 communication system include initial ranging, handover ranging, periodic ranging, and bandwidth request ranging.

The initial ranging is performed when the base station requests the base station to acquire synchronization between the base station and the terminal, and sets an accurate time offset between the mobile station (hereinafter referred to as MS) and the base station. The ranging is performed to adjust the transmit power, and the periodic ranging is performed by the MS adjusting the time offset and the transmission power with the base station through the initial ranging to adjust the channel state with the base station. The bandwidth request ranging is a ranging in which an MS that adjusts a time offset and a transmission power with a base station through the initial ranging requests a bandwidth allocation in order to perform actual communication with the base station. .

FIG. 1 schematically illustrates a general IEEE 802.16 communication system structure. The IEEE 802.16 communication system has a multi-cell structure. The base station 110 manages the cell 100 and the cell 150. Base station 140 and a plurality of mobile terminals (111, 113, 130, 151, 153). In addition, signal transmission and reception between the base stations and the MSs is performed using the OFDM / OFDMA scheme.

2 illustrates an example of an OFDMA TDD frame structure according to the OFDMA IEEE 802.16e standard, and includes a downlink (DL) frame and an uplink (UL) frame. Is done. The first symbol of the downlink is assigned a preamble. A Tx / Rx Transition Gap is inserted between the downlink and the uplink, and an Rx / Tx Transition Gap is inserted between the end and the beginning of the frame. In addition, the first four subchannels of the two OFDMA symbols transmitted immediately after the preamble include a frame control header (FCH). DL-MAP is an area where a DL-MAP message is transmitted.

The preamble is used for frame synchronization and cell division, and a synchronization signal for acquiring mutual synchronization between the base station and the MS is transmitted through the preamble region, that is, a preamble sequence. The frame control header (FCH) is for transmitting frame configuration information.

Each OFDMA frame has a ranging channel. The ranging channel includes one or more subchannels. The number of subchannels constituting the ranging channel is assigned to an UL (UpLink) -MAP message. Included.

The UL-MAP area is an area in which an UL-MAP message is transmitted, and IEs included in the UL-MAP message are shown in Table 1.

TABLE 1

As shown in Table 1, the UL-MAP message is a Management Message Type indicating a type of a message to which a plurality of information elements (IEs) are transmitted, an Uplink Channel ID indicating an Uplink Channel ID used, and an uplink. Each data burst constituting a downlink frame and a UCD count indicating a count corresponding to a configuration change of an Uplink Channel Descript (hereinafter referred to as 'UCD') message including a link burst profile. Burst) includes a plurality of UL-MAP IEs indicating the size / location / characteristics. The format of the UL-MAP IE is shown in Table 2.

TABLE 2

As shown in Table 2, the UL-MAP IE has a connection ID indicating an MS using an uplink data burst, and an Uplink Interval Usage Code for identifying the type of UL-MAP IE. (Hereinafter referred to as 'UIUC') and different IEs corresponding to the UIUC values. For example, when UIUC = 12, the MS is used for indicating resource allocation information necessary for ranging to the base station, that is, location, size, and attribute of an uplink frame. In other words, the UL-MAP IE having UIUC = 12 indicates the OFDMA Symbol offset (representing the distance in OFDMA Symbol units away from the beginning of the frame) and Subchannel Offset (Subchannel Index unit away from Subchannel 0) in Table 2 above. Denotes the starting point of the ranging region. In addition, ranging resource allocation information is shown from the starting point by using No.OFDMA symbols (number of symbols in the data burst) and No.Subchannel (number of subchannel indexes). In addition, the ranging area allocated using the Ranging Method is used for Initial Ranging or Handover Ranging or for bandwidth requirement or periodic ranging. The UL-MAP message includes two ranging regions, that is, a ranging region for initial ranging / handover ranging (Ranging Method = 0b00 or 0b01), and a ranging region for periodic ranging / bandwidth request (Ranging Method = 0b10). Or 0b11).

On the other hand, UL-MAP IEs having UIUC = 1 to UIUC = 11 are sizes of data bursts (Duration in OFDMA slots) used for a fast feedback channel, for data transmission of an MS, and for indicating an end of an UL-MAP region. ) And the repetition coding indication used. UL-MAP IEs having UIUC = 1 to UIUC = 11 are referred to as an uplink channel description (UCD), which indicates modulation, coding method, and physical characteristics for respective bursts. One-to-one mapping with messages. Therefore, the MS must know the UCD information before receiving the UL-MAP message and decoding it.

In addition, if the MS does not successfully perform ranging, a random backoff value is set to increase the probability of success in the next attempt, and the ranging attempt is performed again after delaying the backoff time.

The base station transmits broadcast information to be broadcast to managed MSs through the DL-MAP region of the downlink frame.

The MSs monitor all frequency bands preset in each of the terminals as the power is turned on, so that the highest size, i.e., the highest carrier to interference and noise ratio, Detects a pilot channel signal having a " CINR. &Quot; The base station transmitting the pilot channel signal having the strongest pilot CINR is determined to be the base station to which the terminal is currently belonging, and the DL-MAP region and the UL-MAP region of the downlink frame transmitted by the base station are identified. The control information for controlling the uplink and the downlink of the information and information indicating the actual data transmission and reception position.

The uplink frame includes a region for initial ranging and handover ranging, a region for periodic ranging and bandwidth request ranging, and a scheduled data region including uplink data of terminals.

The region for initial ranging and handover ranging has a UL-MAP IE with UIUC = 12 and Ranging Method = 0b00 or 0b01. The region for periodic ranging and bandwidth request ranging has a UL-MAP IE with UIUC = 12 and Ranging Method = 0b10 or 0b11 similarly to the initial ranging region. The ranging regions may exist together in one uplink frame, and the base station may or may not allocate the regions to frames according to a specific situation. In addition, the ranging regions may be allocated to an uplink frame with a region and a size determined by the UL-MAP IE.

However, if the UL-MAP IE with UIUC = 12 does not exist in the UL-MAP message, the MS recognizes that there are no ranging regions allocated by the UL-MAP IE.

3 is a diagram schematically illustrating a communication procedure of a broadband wireless access communication system. Referring to FIG. 3, first, the MS 520 monitors all frequency bands preset in the MS 520 as it is powered on, so that the highest size, that is, the highest pilot carrier versus A pilot channel signal having an interference noise ratio (CNIR) is detected. The MS 320 determines the base station 300 that has transmitted the pilot channel signal having the strongest CINR as the base station 300 to which the MS 320 itself belongs, and transmits it from the base station 300. Receive a preamble of a downlink frame (frame) to obtain a system synchronization with the base station (300).

As described above, when system synchronization is obtained between the MS 520 and the base station 300, the base station 300 transmits a DCD, DL-MAP message and a UCD, UL-MAP message to the MS 320. (Steps 311 and 313). Here, the DCD and DL-MAP messages may receive information necessary for the MS 320 to acquire synchronization with respect to the base station 300 on a forward link and thereby receive messages transmitted to the MSs on the forward link. This message informs the MS 320 of the structure of the physical channel. In addition, the UCD and UL-MAP messages are messages that inform the MS of information such as the scheduling period of the MS and the structure of the physical channel in the reverse link.

On the other hand, when the MS 320 performs the ranging to the base station 300, the ranging code is transmitted to the base station 300 (step 315), and the base station 500 receiving the ranging code is A ranging response (RNG-RSP) message is transmitted to the MS 320 (step 317). Here, the MS 320 may transmit a ranging request message instead of the ranging code.

However, when ranging is performed using the ranging request message, ranging collision confirmation between MSs may be higher than that of the ranging code transmission.

The ranging region described above is allocated by the UL-MAP IE having UIUC = 12 in the UL-MAP message. The MS can know the location and size of the ranging region in the uplink frame by receiving the UL-MAP IE, and the ranging region can be allocated to every uplink frame.

4 shows a message flow for acquiring an access terminal with three different contention-based CDMA code rangings. In FIG. 4, initial ranging code (RNG-REQ) in initial ranging, handover ranging code (RNG-REQ) and bandwidth request ranging in handover ranging. RNG-REQ (BWR ranging code) in shows the contention based CDMA code ranging. In FIG. 6, the capability information of the UE is obtained from the SBC-REQ, RNG-REQ (MAC_Addr or HO_ID) in the initial ranging, or the BWR Header (TCID) in the SBC-REQ and Bandwidth Request Ranging. Is showing.

Therefore, contention-based CDMA code ranging does not know who the base station (BS) is sending CDMA code without additional message based on the above information exchange. As a result, in performing the management and allocation of the radio resources, the above-mentioned information acquisition time points cause limitations in efficiently managing and allocating radio resources.

In the current standard, when a message having a large unicast message such as SBC_REQ is transmitted, the number of symbols allocated is small and the subchannels are distributed, so that the transmission power density may be reduced. Thus, there is a need for an alternative for more efficient message transmission.

In addition, in IEEE 802.16, research is being carried out in earnest to improve communication coverage of IEEE 802.16 networks, increase communication throughput, and system capacity by using relay stations. Here, the communication network using the relay station includes a communication using a relay station for communication between the base station and the terminal.

The relay station in the communication network performs a function of relaying information between the subscriber station or the terminal and the base station, between different relay stations or between the relay station and the base station. Therefore, in a communication network using a relay station, a technique for distinguishing between a terminal and a relay station managed by a base station is required for more efficient use of radio resources.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and necessities, and a technical object of the present invention is to provide a method and apparatus for ranging that supports efficient management and use of radio resources.

In addition, another object of the present invention is to provide a method and apparatus for ranging that can dynamically allocate ranging opportunities.

In addition, another object of the present invention is to provide a method and apparatus for ranging for enabling efficient communication even in a communication network including a relay station.

In order to achieve the above technical problem, a method for ranging of an OFDM / OFDMA communication system according to the present invention includes: reading capability information of a terminal included in a UL-MAP when performing ranging; And transmitting, by the terminal corresponding to the capability information of the read terminal, the ranging code to the base station.

Preferably, the method for ranging of the OFDM / OFDMA communication system may further include adding, by the base station, the capability information of the terminal to the UL-MAP. The capability information of the terminal preferably includes at least one of an RS terminal, an MS terminal, a MIMO supporting terminal, a beamforming (AAS) supporting terminal, a HARQ supporting terminal, a terminal not supporting MIMO and AAS, and a terminal not supporting HARQ. Do.

In order to achieve the above technical problem, an apparatus for ranging of an OFDM / OFDMA communication system according to the present invention includes: a capability information analyzer for analyzing capability information of a terminal included in a UL-MAP when performing ranging; And a ranging code transmitter for transmitting the ranging code from the terminal having the interpreted capability to the base station.

According to another aspect of the present invention, there is provided an apparatus for ranging of an OFDM / OFDMA communication system, including: a UL-MAP generator for generating a UL-MAP including capability information of a terminal in a UL-MAP; And a UL-MAP transmitter for transmitting the UL-MAP to the terminal.

In order to achieve the above technical problem, a method for ranging in an OFDM / OFDMA communication system according to the present invention includes a ranging including at least a ranging region and capability information of a terminal included in a UL-MAP when performing ranging. Reading a ranging region allocation IE; And transmitting a ranging code by a terminal corresponding to a terminal capability included in the ranging region allocation information element to a ranging region included in the ranging region allocation information element. The ranging code transmission method of the OFDM / OFDMA communication system preferably further includes adding a ranging region allocation information element including at least a ranging region and capability information of a terminal to the UL-MAP. The capability information of the terminal includes at least one of an RS terminal, an MS terminal, a MIMO supporting terminal, a beamforming (AAS) supporting terminal, a HARQ supporting terminal, a terminal not supporting MIMO and AAS, and a terminal not supporting HARQ. Preferably, the ranging codes include Initial Ranging Codes, Periodic Ranging Codes, Bandwidth Request Ranging Codes, and Handover Ranging Codes. Ranging Codes) is preferably included.

In order to achieve the above technical problem, an apparatus for ranging in an OFDM / OFDMA communication system according to the present invention includes, when performing ranging, a lane including capability information of at least a ranging region and a terminal included in the UL-MAP. A ranging region element reading unit that reads a ranging region allocation IE; And a ranging code transmitter for transmitting a ranging code by the terminal corresponding to the capability specified by the ranging region allocation information element to the ranging region designated by the ranging region allocation information.

In order to achieve the above technical problem, an apparatus for ranging in an OFDM / OFDMA communication system according to the present invention includes a lane including capability information of at least a ranging region and a terminal using an extended UIUC of UL-MAP. A UL-MAP generation unit for generating a UL-MAP including a region allocation information element; And a UL-MAP transmitter for transmitting the UL-MAP to the terminal.

In order to achieve the above another technical problem, a method for ranging in an OFDM / OFDMA communication system according to the present invention comprises: setting downlink parameters and uplink parameters in a ranging performing method in an OFDM / OFDMA communication system; step; And transmitting a downlink MAP message including the downlink parameters and an uplink MAP message including the uplink parameters, wherein one of the uplink parameters should perform dedicated ranging. And a first parameter indicating at least one of an access terminal type to be accessed and an access terminal capability.

Preferably, the access terminal type represents a terminal or a relay, and the access terminal capability represents at least one of MIMO, AAS, and HARQ support capability. The first parameter of the uplink parameters is preferably set according to at least one of the number of relays, the number of terminals, the ratio of the number of RS and MS.

In another aspect of the present invention, there is provided a method for ranging in an OFDM / OFDMA communication system according to the present invention. In a method for performing ranging in an OFDM / OFDMA communication system, a downlink MAP message including a downlink parameter is transmitted. Making; And transmitting an uplink MAP message including uplink parameters, wherein one of the uplink parameters includes a general ranging for random ranging and an access device corresponding to a predetermined criterion. And a first parameter indicating one of dedicated ranging for performing ranging.

One of the uplink parameters is preferably a second parameter indicating the type of access device or ability of the access device to perform ranging. The access device type represents a terminal or a relay, and the capability of the access device preferably represents at least one of MIMO, AAS, and HARQ support capabilities.

Hereinafter, with reference to the accompanying drawings and preferred embodiments will be described in detail the present invention. For reference, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted in the following description.

When performing network entry, handover, bandwidth request, etc., it will be helpful if the RS (relay station) can be distinguished from the MS (terminal) at the earliest possible stage and know the capabilities of the terminal. The basic concept of the present invention not only acquires information about a type of terminal, for example, RS, MS, etc., and capability, for example, MIMO, AAS, HARQ, etc., but also dynamically allocates a ranging opportunity. It is. That is, the base station broadcasts not only the same lazing opportunity as performed through UIUC 12 (CDMA bandwidth requirement, CDMA ranging) but also which type of terminal permits ranging code transmission. To this end, a ranging region allocation IE is newly defined as a type of UL-MAP information element (IE). The ranging region allocation IE has a parameter indicating 'terminal type' in addition to the same information as UIUC 12. This will be described in more detail.

The present invention can be used not only for ranging between the terminal and the base station but also for ranging between the terminal and the relay station and the base station. Hereinafter, BS refers to a base station considering only a terminal without considering a relay station, and MR-BS refers to a base station considering a relay station. And a terminal means a terminal (MS) or a relay station (RS). In addition, the RS may share radio resources with terminals and perform a terminal function.

5 is a flowchart illustrating an embodiment of a method for ranging in an OFDM / OFDMA scheme communication system according to the present invention. Referring to FIG. 5, first, a base station (BS or MR-BS) adds capability information of a terminal using a UIUC of UL-MAP, and transmits the capability information to a terminal (step S510). It is preferable to include at least one of a terminal, an MS terminal, a MIMO supporting terminal, a beamforming (AAS) supporting terminal, a HARQ supporting terminal, a terminal not supporting MIMO and AAS, and a terminal not supporting HARQ. The terminal capability information can be represented using 8 bits. For example, bit 0 is an RS terminal, bit 1 is an MS terminal, bit 2 is non-MINO and non-AAS, bit 3 supports MIMO, bit 4 supports beamforming (AAS), bit 5 non-HARQ, and bit 6 Is HARQ support, bit 7 may be represented as reversed.

Then, while the ranging is in progress, the terminal (RS or MS) reads the UIUC of the UL-MAP to find out the capability information of the terminal. (Step S520) The terminal corresponding to the capability information of the read terminal is lane In step S530, the terminal having the capability indicated by the set bit among the 8 bits representing the capability information transmits the ranging code to the base station.

6 is a block diagram illustrating a configuration of an embodiment of an apparatus for ranging in an OFDM / OFDMA communication system according to the present invention. It includes a capability information analysis unit 610 and the ranging code transmission unit 620.

The capability information analysis unit 610 interprets the capability information of the terminal indicated by the UIUC by reading a UIUC contained in the UL-MAP by receiving a UL-MAP by a terminal, for example, an RS or MS. do. The ranging code transmitter 620 transmits a ranging code (CDMA code) to a base station having the interpreted capability.

7 is a block diagram illustrating a configuration of another embodiment of an apparatus for ranging in an OFDM / OFDMA communication system according to the present invention. The UL-MAP generator 710 and the UL-MAP transmitter 720 are included. The UL-MAP generation / transmission apparatus corresponds to the ranging code transmission apparatus of the aforementioned OFDM / OFDMA communication system and is located in a base station (BS or MR-BS).

The UL-MAP generation unit 710 generates the UL-MAP by including the capability information of the terminal using the UIUC contained in the UL-MAP. The UL-MAP transmitter 720 transmits the UL-MAP to a terminal, for example, MS or RS, for ranging. As described above, the capability information of the terminal includes at least one of an RS terminal, an MS terminal, a MIMO supporting terminal, a AAS (Beamforming) supporting terminal, a HARQ supporting terminal, a terminal not supporting MIMO and AAS, and a terminal not supporting HARQ. Include.

8 is a flowchart illustrating another embodiment of a method for ranging in an OFDM / OFDMA scheme communication system according to the present invention. Referring to FIG. 8, a ranging region allocation information element including at least a ranging region and capability information of a terminal is added to the terminal by using an extended UIUC of UL-MAP and then transmitted to the terminal. (Step S810)

As the base station (BS or MR-BS) and the terminal performs a ranging procedure, the terminal receives a UL-MAP and a ranging region allocation IE through an extended UIUC of the UL-MAP. (S820) The ranging region allocation IE includes at least the ranging region and capability information of the terminal. Then, the terminal corresponding to the terminal capability included in the ranging region allocation information element transmits the ranging code to the ranging region included in the ranging region allocation information element (step S830).

Code allocation of the extended UIUC can be shown in Table 3.

TABLE 3

In Table 3, it can be seen that 0B is allocated to the Ranging Region Allocation IE in the conventional reserved codes (0B to OF).

The capability information of the terminal includes at least one of an RS terminal, an MS terminal, a MIMO supporting terminal, a beamforming (AAS) supporting terminal, a HARQ supporting terminal, a terminal not supporting MIMO and AAS, and a terminal not supporting HARQ. .

As a specific example, the Ranging Region Allocation IE can be shown in Table 4.

TABLE 4

In addition, Table 5 shows the meaning of MIMO support and HARQ support in the terminal.

TABLE 5

The ranging codes include initial ranging codes, periodic ranging codes, bandwidth request ranging codes, and handover ranging codes. Codes).

FIG. 9 is a block diagram illustrating a configuration of another embodiment of an apparatus for ranging in an OFDM / OFDMA communication system according to the present invention, and includes a ranging area IE reading unit 910 and a ranging code transmitting unit ( 920).

The ranging area IE reading unit 910 is a ranging area allocation information element represented by the extended UIUC of the UL-MAP when a base station (BS or MR-BS) and a terminal perform a ranging procedure. Read Region Allocation IE). The Ranging Region Allocation IE includes at least capability information of a ranging region and a terminal. The ranging code transmitter 920 transmits a ranging code to a ranging region designated by the terminal corresponding to the capability designated by the ranging region allocation information element in the ranging region allocation information. The terminal capability information can be represented using 8 bits, for example, bit 0 is an RS terminal, bit 1 is an MS terminal, bit 2 is non-MINO and non-AAS, bit 3 supports MIMO, and bit 4 is AAS. (Beamforming) support, bit 5 can be represented as non-HARQ, bit 6 is HARQ support, bit 7 is reversed. At this time, if only bit 0 is set, only the RS terminal transmits a ranging code to the base station.

FIG. 10 is a block diagram illustrating a configuration of another embodiment of an apparatus for ranging of an OFDM / OFDMA communication system according to the present invention. The UL-MAP generator 1010 and the UL-MAP transmitter 1020 are included. The apparatus for ranging in the OFDM / OFDMA communication system corresponds to the apparatus for ranging in the OFDM / OFDMA communication system described above with reference to FIG. 9.

The UL-MAP generation unit 1010 generates a UL-MAP including a ranging region allocation information element by using an extended UIUC of the UL-MAP. The ranging region allocation information element includes at least the capability information of the ranging region and the terminal. The UL-MAP transmitter 1020 transmits the UL-MAP including the ranging area allocation information element to the terminal by a base station (BS or MR-BS). The ranging region allocation information element is the same as described above.

11 shows a specific example of a method for ranging in an OFDM / OFDMA communication system according to the present invention. A method for ranging of the OFDM / OFDMA communication system according to the present invention will be described in more detail with reference to FIG. 11.

The periodicity of the ranging opportunity may be determined according to the number of RSs and MSs, the ratio of RSs and MSs, or the service policy of the service provider. In addition, the periodicity of the ranging opportunity may be dynamically changed by a base station (MR-BS) ranging opportunity allocation algorithm. In particular, the periodicity of bandwidth requirements and the periodic ranging opportunities are suitable for dynamic allocation. This is because RAS knows the information of the terminal that is attempting bandwidth demand or periodic ranging.

Referring to FIG. 11, first, a base station (MR-BS) transmits an FCH / DCD / UCD to a relay station (RS) for ranging. The RS then delivers this to the terminal (MS). In addition, the base station (MR-BS) transmits the DL-MAP to the RS, the RS delivers it to the MS.

The base station (MR-BS) then transmits the UL-MAP to the RS, which forwards it back to the MS. The UL-MAP includes Ranging Region Allocation IE information as shown in Table 4. For example, if 8 bits indicating the terminal type is '01111101', the MS terminal does not send a ranging code because bit 1 is set to 0.

After receiving the UL-MAP, the RS reads a Ranging Region Allocation IE and transmits a ranging code, that is, an RNG-REQ (CDMA code), to the base station MR-BS. At this time, the base station (MR-BS) detects the RS ranging.

On the other hand, in the next frame, when the base station (MR-BS) transmits the DL-MAP to the RS, the RS likewise transmits it to the MS. The base station (MR-BS) then transmits the UL-MAP to the RS, which forwards it back to the MS. Since the UL-MAP contains Ranging Region Allocation IE information as shown in Table 6, for example, if 8 bits indicating the terminal type is '01111110', bit 0 is set to 0, so the RS terminal does not send a ranging code. Do not.

The RS receiving the UL-MAP reads the Ranging Region Allocation IE and does not transmit a ranging code when it knows that it is not a corresponding terminal. However, the MS receiving the UL-MAP reads the Ranging Region Allocation IE, and knows that it is a corresponding terminal, and sends a ranging code, that is, a RNG-REQ (CDMA code) to the RS, and the RS transmits it to the base station (MR-BS). . At this time, the base station (MR-BS) detects the MS ranging.

By doing so, you not only get early information about the type of terminal (e.g. RS, MS, etc.), capability, (e.g. MIMO, AAS, HARQ, etc.), but also dynamically allocate ranging opportunities. can do.

On the other hand, the present invention described above can also be embodied as computer readable codes on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disks, hard disks, optical data storage devices, and also in the form of carrier waves (for example, transmission over the Internet). It includes what is implemented. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. And functional programs, codes and code segments for implementing the present invention can be easily inferred by programmers in the art to which the present invention belongs.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art to which the present invention pertains can implement the present invention in other specific forms without changing the technical spirit or essential features, The examples are to be understood in all respects as illustrative and not restrictive.

In addition, the scope of the present invention is specified by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. Should be interpreted as

According to a method and apparatus for transmitting a ranging code in an OFDM / OFDMA communication system and a ranging apparatus and method for the same, scheduling and scheduling are performed to determine the capability of each terminal in an initial stage of ranging of the terminal. Efficient use of radio resources is possible. In addition, the ranging opportunity can be dynamically allocated, and more efficient communication can be performed in the communication network considering the relay station.

Claims (23)

Reading capability information of a terminal included in a UL-MAP to perform ranging; And And transmitting a ranging code by a terminal corresponding to the capability information of the read terminal to a base station. The method of claim 1, And transmitting the capability information of the terminal to the UL-MAP by the base station and transmitting the capability information of the terminal to the UL-MAP. According to claim 1 or 2, wherein the capability information of the terminal OFDM / OFDMA communication comprising at least one of an RS terminal, an MS terminal, a MIMO supporting terminal, a AAS (Beamforming) supporting terminal, a HARQ supporting terminal, a terminal not supporting MIMO and AAS, and a terminal not supporting HARQ. Method for ranging of the system. A capability information analyzer for interpreting capability information of a terminal included in a UL-MAP when performing ranging; And And a ranging code transmitter for transmitting a ranging code from a terminal having the interpreted capability to a base station. 5. The terminal of claim 4, wherein the capability information of the terminal is OFDM / OFDMA communication comprising at least one of an RS terminal, an MS terminal, a MIMO supporting terminal, a AAS (Beamforming) supporting terminal, a HARQ supporting terminal, a terminal not supporting MIMO and AAS, and a terminal not supporting HARQ. Apparatus for ranging of the system. A UL-MAP generation unit for generating a UL-MAP including capability information of a terminal of the UL-MAP; And And a UL-MAP transmitter for transmitting the UL-MAP to a terminal. 7. The terminal of claim 6, wherein the capability information of the terminal is OFDM / OFDMA scheme comprising at least one of an RS terminal, an MS terminal, a MIMO supporting terminal, a AAS (Beamforming) supporting terminal, a HARQ supporting terminal, a terminal not supporting MIMO and AAS, and a terminal not supporting HARQ. Apparatus for ranging of a communication system. Reading a ranging region allocation information element corresponding to a UL-MAP, the ranging region allocation information element including at least a ranging region and capability information of a terminal, for performing ranging; And And transmitting, by a terminal corresponding to the terminal capability included in the ranging region allocation information element, a ranging code to a ranging region included in the ranging region allocation information element. Method for ranging. The method of claim 8, Adding to the UL-MAP a ranging region allocation information element comprising at least a ranging region and capability information of the terminal. 10. The method of claim 8 or 9, wherein the capability information of the terminal is OFDM / OFDMA, characterized in that it comprises at least one of RS terminal, MS terminal, MIMO support terminal, AAS (Beamforming) support terminal, HARQ support terminal, terminal not supporting MIMO and AAS, and terminal not supporting HARQ Method for ranging of a communication system. The ranging code according to claim 8 or 9, Initial Ranging Codes, Periodic Ranging Codes, 10. A method for ranging in an OFDM / OFDMA communication system comprising at least one of bandwidth request ranging codes and handover ranging codes. A ranging region IE reader for reading a ranging region allocation information element included in the UL-MAP, the ranging region allocation information element including at least a ranging region and capability information of a terminal; And And a ranging code transmitter for transmitting a ranging code to a ranging region designated by the ranging region allocation information by a terminal corresponding to the capability designated by the ranging region allocation information element. Apparatus for ranging in an OFDMA communication system. 13. The terminal of claim 12, wherein the capability information of the terminal is OFDM / OFDMA, characterized in that it comprises at least one of RS terminal, MS terminal, MIMO support terminal, AAS (Beamforming) support terminal, HARQ support terminal, terminal not supporting MIMO and AAS, and terminal not supporting HARQ Apparatus for ranging of a communication system. A UL-MAP generation unit for generating a UL-MAP including a ranging area allocation information element including at least a ranging area and capability information of a terminal in the UL-MAP; And And a UL-MAP transmitter for transmitting the UL-MAP to a terminal. 15. The method of claim 14, wherein the capability information of the terminal is OFDM / OFDMA, characterized in that it comprises at least one of RS terminal, MS terminal, MIMO support terminal, AAS (Beamforming) support terminal, HARQ support terminal, terminal not supporting MIMO and AAS, and terminal not supporting HARQ Apparatus for ranging of a communication system. A ranging method in a communication system supporting an OFDM / OFDMA scheme Setting downlink parameters and uplink parameters; And Transmitting a downlink MAP message comprising the downlink parameters and an uplink MAP message comprising the uplink parameters, One of the uplink parameters And a first parameter indicating at least one of an access terminal type and an access terminal capability to perform dedicated ranging. 17. The method of claim 16, wherein the access terminal type is Method characterized by indicating a terminal or a relay. 17. The apparatus of claim 16, wherein the access terminal capability is At least one of MIMO, AAS, HARQ support capability. 17. The method of claim 16, wherein the first of the uplink parameters is And at least one of a number of relays, a number of terminals, and a ratio of the number of RSs and MSs. A ranging method in a communication system supporting an OFDM / OFDMA scheme, Transmitting a downlink MAP message comprising a downlink parameter; And Transmitting an uplink MAP message comprising uplink parameters, Wherein one of the uplink parameters is a first parameter indicating one of a general ranging that performs random ranging and a dedicated ranging that performs ranging by an access device corresponding to a predetermined criterion. 21. The apparatus of claim 20, wherein one of the uplink parameters is And a second parameter indicative of the type of access access device or capability of the access device to perform ranging. The device of claim 21, wherein the access device type is Method characterized by indicating a terminal or a relay. The method of claim 21, wherein the capability of the access device is At least one of MIMO, AAS, HARQ support capability.

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