JP2009543429A - Apparatus and method for reducing resource allocation information message amount in a broadband wireless communication system - Google Patents

Abstract

An object of the present invention is to provide an apparatus and method for reducing the overhead of resource allocation information messages in a broadband wireless communication system. Another object of the present invention is to provide an apparatus and method for increasing a user data transmission rate by periodically transmitting a resource allocation information message in a specific area in a broadband wireless communication system. .
A base station apparatus in a broadband wireless communication system of the present invention generates a scheduler for determining whether to generate uplink control region allocation information, and generates uplink control region allocation information according to the determination of the scheduler. A generator.
[Selection] Figure 3

Description

  The present invention relates to a broadband wireless communication system, and more particularly, to an apparatus and method for reducing a resource allocation information message amount in a broadband wireless communication system.

  In a 4th generation (4G) communication system, which is a next generation communication system, a service having various quality of service (Qos: Quality of Service) is provided to a user using a transmission speed of about 100 Mbps. There is a lot of research going on. In particular, in the current 4G communication system, broadband wireless access (Broadband) such as a wireless short-range communication network (hereinafter referred to as LAN) system and a wireless metropolitan area network (hereinafter referred to as MAN) system. Research is being actively conducted to support high-speed services in a form that guarantees mobility and service quality in wireless access (BWA) communication systems. A typical communication system is an IEEE (Institut of Electrical and Electronics Engineers) 802.16 communication system.

  Among the 802.16 standard working groups, the standards represented as wireless communication standards are 802.16d and 802.16e, and the two standards further include a single carrier and orthogonal. The frequency division multiplexing (OFDM) and orthogonal frequency division multiple access (hereinafter referred to as OFDMA) standards can be divided into the following standards: OFDMA (Orthogonal Frequency Division Multiplexing); Here, the OFDMA standard of 802.16d / e is a downlink and uplink frame structure using frequency resources and time resources in order to effectively transmit digital bit information to be transmitted to a receiving end. And resource allocation in a frame taking into account various radio channel conditions.

  FIG. 1 shows a frame structure of a conventional OFDMA communication system.

  As shown in FIG. 1, a frame used in the OFDMA standard is divided into an uplink frame 120 and a downlink frame 110.

  The downlink frame 110 includes a preamble 111, a frame control header (hereinafter referred to as FCH) 113, a downlink map (downlink-MAP, hereinafter referred to as DL-MAP) 115, an uplink map ( Uplink-MAP (hereinafter referred to as UL-MAP) 117 and downlink data burst (Burst) 119.

  The preamble 111 is an area for information used for terminal initial synchronization acquisition and cell search, and the FCH 113 is an area representing a coding method of the DL-MAP 115 and the UL-MAP 117. The DL-MAP 115 is an area representing the resource allocation information message for each terminal of the downlink burst 119, and the UL-MAP 117 is a resource allocation information message for each terminal of the uplink frame control information 121 and the uplink data burst 123. It is an area to represent. The downlink burst 119 is an area for transmitting user data from the base station to the terminal.

  The uplink frame 120 includes a control information area 121 and an uplink data burst 123.

  The control information area 121 is an area for transmitting control information necessary for communication from the terminal to the base station, and the uplink data burst 123 is an area for transmitting user data from the terminal to the base station. is there.

  Here, the control information area 121 includes a ranging channel 151, channel quality information (hereinafter referred to as CQI) channel 153, an acknowledge (hereinafter referred to as ACK) channel 155, and a sounding (sounding). ) Configured with a channel 157;

  The ranging channel 151 is an area where the terminal can transmit data to the base station without resource allocation from the base station, and performs initial network connection, handoff (Handoff), or resource allocation request. Used in cases. The CQI channel 153 is an area used for the terminal to inform the base station of the downlink channel status. The ACK channel 155 is an area used for the terminal to inform the base station whether or not the downlink data burst has been successfully received, and the sounding channel 157 is an area for the base station to obtain channel information of the terminal. is there.

  In the OFDMA system using the frame structure described above, the map information and the data burst are competing for resource occupation due to the structure in which the map area representing the resource allocation information message and the user data burst are configured in the same frame. . In other words, the greater the amount of map information, the less resources are allocated to user bursts. The frame structure can be changed dynamically, but it is rare that the frame structure changes during actual system use. In particular, in the case of the control information 121 of the uplink frame 120, a characteristic that each frame maintains the same structure strongly appears. Therefore, there is a problem in that the resource allocation information message having the same content is transmitted every frame, thereby reducing the resources allocated to the data burst and reducing the overall system transmission rate.

  The object of the present invention is to solve the above-mentioned problems and disadvantages and to provide the following advantages. That is, it is an object of the present invention to provide an apparatus and method for reducing resource allocation information message overhead in a broadband wireless communication system.

  Another object of the present invention is to provide an apparatus and method for increasing a user data transmission rate by periodically transmitting a resource allocation information message of a specific area in a broadband wireless communication system.

  To achieve the above object, according to an aspect of the present invention, a base station apparatus in a broadband wireless communication system determines whether to generate uplink control region allocation information, and determines according to the determination of the scheduler. A generator for generating uplink control region allocation information.

  To achieve the above object, according to another aspect of the present invention, a terminal apparatus in a broadband wireless communication system includes a receiving unit that receives a resource allocation message, and the resource allocation message includes uplink control region allocation information. If not, the stored uplink control region allocation information is maintained, and if the resource allocation message includes the uplink control region allocation information, the stored uplink control region allocation information is included in the received resource allocation message. And a decoding unit that updates the included uplink control region allocation information.

  In order to achieve the above object, according to another aspect of the present invention, a method for operating a base station in a broadband wireless communication system includes a step of determining whether to generate uplink control region allocation information, And generating uplink control area allocation information according to the determination result.

  In order to achieve the above object, according to another aspect of the present invention, when a resource allocation message is received, a UE operation method in a broadband wireless communication system includes uplink control region allocation information in the resource allocation message. The process of checking whether the uplink control area allocation information is not included, and if the uplink control area allocation information is not included, the process of maintaining the stored uplink control area allocation information and the uplink control area allocation information are included. And updating the stored uplink control region allocation information to the uplink control region allocation information included in the received resource allocation message.

  In order to achieve the above object, according to another aspect of the present invention, a method of operating a terminal in a broadband wireless communication system includes receiving a broadcast message broadcast at intervals of several frames, and decoding the broadcast message. And acquiring uplink control region allocation information.

  In order to achieve the above object, according to another aspect of the present invention, a base station apparatus in a broadband wireless communication system includes a generator that generates a broadcast message including uplink control region allocation information, and an interval of several frames. And a transmitter for broadcasting a broadcast message.

  In order to achieve the above object, according to another aspect of the present invention, a terminal device in a broadband wireless communication system includes: a receiving unit that receives a broadcast message broadcast at intervals of several frames; And a decoder for acquiring uplink control region allocation information.

  In order to achieve the above object, according to another aspect of the present invention, a base station operating method in a broadband wireless communication system includes uplink control region allocation information and broadcast including uplink control region allocation information transmission period information. It includes a process of generating a message and a process of broadcasting a broadcast message to a terminal.

  In order to achieve the above object, according to another aspect of the present invention, an operation method of a terminal in a broadband wireless communication system includes uplink control region allocation information and broadcast message including transmission period information of uplink control region allocation information. And a process of decoding a broadcast message and acquiring uplink control region allocation information.

It is a figure which shows the frame structure of the orthogonal frequency division | segmentation connection communication system by a prior art. It is a figure which shows the block configuration of the transmitter in the broadband wireless communication system by this invention. It is a figure which shows the block configuration of the receiver in the broadband wireless communication system by this invention. It is a figure which shows the procedure for producing | generating a resource allocation information message in the base station of the broadband wireless communication system by the 1st Embodiment of this invention. It is a figure which shows the procedure for confirming a resource allocation information message in the terminal of the broadband wireless communication system by the 1st Embodiment of this invention. It is a figure which shows the procedure for producing | generating a resource allocation information message in the base station of the broadband wireless communication system by the 2nd Embodiment of this invention. It is a figure which shows the procedure for confirming a resource allocation information message in the terminal of the broadband wireless communication system by the 2nd Embodiment of this invention. It is a figure which shows the procedure for confirming a resource allocation information message in the terminal of the broadband wireless communication system by the 3rd Embodiment of this invention.

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

  Hereinafter, an apparatus and method for increasing the transmission rate of a system by reducing the overhead of a resource allocation information message in a broadband wireless communication system will be described. In the following description, the broadband wireless communication system will be described by taking an Orthogonal Frequency Division Multiple Access (hereinafter referred to as OFDMA) system as an example.

  FIG. 2 shows a block configuration of a transmitter of a base station in an OFDMA system according to the present invention.

  As shown in FIG. 2, the transmitter includes a scheduler 201, a map (MAP) generator 203, a channel encoder 205, a modulator 207, a resource mapper 209, an OFDM modulator 211, a DAC (Digital to Analog Converter) 213, and An RF (Radio Frequency) transmitter 215 is provided.

  The scheduler 201 generates resource allocation schedule information for a data burst region in the downlink, a data burst region in the uplink (hereinafter referred to as UL), and a control region. Here, the control region includes a ranging channel, a CQI (Channel Quality Information) channel, an ACK (Acknowledged) channel, and a sounding channel. The CQI channel corresponds to a fast feedback channel. In particular, the scheduler 201 determines whether to generate UL control region allocation information and provides it to the map generator. Here, the determination target of whether or not the UL control area allocation information is generated may be the entire UL control area or a part of the UL control area. The scheduler 201 performs control so that the UL control region allocation information is generated when the UL control region allocation information is generated or when the UL control region allocation information is changed. Here, when the UL control area allocation information is changed, control is performed so that the UL control area allocation information is generated in a predetermined number of consecutive frames.

  The map generator 203 receives the resource allocation schedule information from the scheduler 201 and generates a map message. In particular, in the present invention, the map generator 203 generates a map message according to whether or not UL control area allocation information provided from the scheduler 201 is generated. That is, when the UL control region allocation information is generated, the map generator 230 generates a map message including the UL control region allocation information. On the other hand, when the UL control region allocation information is not generated, the map generator 230 generates a map message that does not include the UL control region allocation information. When the UL control region allocation information is included, the map generator 230 generates valid period information of the UL control region allocation information and includes it in the map message.

  The channel encoder 205 encodes the resource allocation information message provided from the map generator 203 at a corresponding encoding rate. The modulator 207 modulates the encoded data provided from the channel encoder 205 into symbols according to a corresponding modulation scheme (for example, QPSK (Quadrature Phase Shift Keying)).

  The resource mapper 209 maps the symbols provided from the modulator 207 according to the frame structure. That is, symbols are mapped to subcarriers used in the frame. The OFDM modulator 211 performs an IFFT (Inverse Fast Fourier Transform) operation on the symbol mapped to the frequency domain provided from the resource mapper 209 and converts the symbol into a time domain signal.

  The DAC 213 converts the generated time domain signal provided from the OFDM modulator 211 into an analog signal. The RF transmitter 215 converts the signal provided from the DAC 213 into a carrier frequency and transmits it through the antenna.

  FIG. 3 shows a block configuration of a receiver of a terminal in the broadband wireless communication system according to the present invention.

  As shown in FIG. 3, the receiver includes an RF receiver 301, an ADC (Analog-Digital Converter) 303, an OFDM demodulator 305, a map extractor 307, a demodulator 309, a channel decoder 311 and a map decoder 313. It is prepared for.

The RF receiver 301 converts an RF signal received via an antenna into a baseband signal. The ADC 303 converts the baseband signal provided from the RF receiver 301 into a digital signal.
The OFDM demodulator 305 performs an FFT (Fast Fourier Transform) operation on the time domain signal provided from the ADC 303 and converts the signal into a frequency domain signal. The map extractor 307 separates and extracts a map signal from the signal provided from the OFDM demodulator 305.

  The demodulator 309 demodulates the map signal provided from the map extractor 305 into data according to a corresponding demodulation method. The channel decoder 311 decodes the map data provided from the demodulator 309 at a corresponding coding rate.

  The map decoder 313 analyzes the map information provided from the channel encoder 311 and updates the resource information that can be used by the terminal. In particular, in the present invention, the map decoder 313 confirms whether or not the UL control area allocation information is included in the map information, and updates the control area allocation information stored according to the confirmed result. That is, if the map information includes UL control area allocation information, the map decoder 313 corrects the already stored UL control area allocation information to new UL control area allocation information. On the other hand, if the UL control area allocation information is not included in the map information, the existing UL control area allocation information is maintained. In addition, when the validity period information is included in the map message, the map decoder 313 discards the stored UL control area allocation information if new UL control area allocation information is not received even when the validity period expires. To do. Here, the UL control region includes a ranging channel, a CQI channel, an ACK channel, and a sounding channel. The CQI channel corresponds to a fast feedback channel.

  Further, although not shown, the control signal transmission unit performs UL signaling (eg, ranging, CQI, ACK, etc.) to the base station using the received UL control region allocation information.

  FIG. 4 shows a procedure for generating a resource allocation information message in the base station of the broadband wireless communication system according to the first embodiment of the present invention.

  As shown in FIG. 4, first, the map generator 203 checks in step 401 whether or not it is time to generate a map.

  When it is time to generate the map, the map generator 203 proceeds to step 403 and confirms the uplink and downlink resource allocation schedules.

  Thereafter, the map generator 203 proceeds to step 405 and compares the UL control area allocation information in the confirmed resource allocation schedule with the recently transmitted UL control area allocation information to confirm whether or not it has been changed. Here, the UL control region includes a ranging channel, a CQI channel, an ACK channel, and a sounding channel. The CQI channel corresponds to a fast feedback channel.

  When the UL control region allocation information has been changed, the map generator 203 proceeds to Step 407 and sets the number of frames (m) that have passed after the UL control region allocation information has been changed to 0.

  After setting the value of m to 0, the map generator 203 proceeds to step 409 and generates a map message including the changed UL control region allocation information. Here, the determination target of whether or not the UL control area allocation information is generated may be the entire UL control area or a part of the UL control area.

  In step 405, if the UL control area allocation information has not been changed, the map generator 203 proceeds to step 411 and confirms whether or not the period for generating the UL control area allocation information has come. In other words, after transmitting a map including UL control region allocation information, the number of times a map not including UL control region allocation information is continuously transmitted is confirmed, and whether or not the number matches a predetermined period. Confirm. Here, the period is a variable determined according to the system setting.

  If it is the generation period of the UL control region allocation information, the map generator 203 proceeds to step 409 and generates a map message including the UL control region allocation information confirmed in step 403.

  On the other hand, when it is not the generation cycle of the UL control area allocation information, the map generator 203 increases the value of m by 1.

  After increasing the value of m by 1, if it is not the generation period of the UL control region allocation information, the map generator 203 proceeds to step 415 and compares the value of m with the value of N. Here, N is a variable for ensuring reception of the changed UL control region allocation information of the terminal, and is the number of frames in which the UL control region allocation information is continuously transmitted. In other words, the changed UL control area allocation information is continuously transmitted N times through frames that are continuous from the time of the change. Here, N is a variable determined according to the system setting.

  If the value of m is smaller than the value of N, the map generator 203 proceeds to step 409 and generates a map message including the UL control area allocation information confirmed in step 403.

  On the other hand, if the value of m is greater than or equal to the value of N, the map generator 203 proceeds to step 417 and generates a map message that does not include UL control region allocation information.

  FIG. 5 shows a procedure for confirming a resource allocation information message in a terminal of the broadband wireless communication system according to the first embodiment of the present invention.

  As shown in FIG. 5, first, the map decoder 313 confirms whether or not a map is received in step 501.

  When the map is received, the map decoder 313 proceeds to step 503 to check whether UL control area allocation information exists in the received map. Here, the UL control region includes a ranging channel, a CQI channel, an ACK channel, and a sounding channel. The CQI channel corresponds to a fast feedback channel.

  If UL control region allocation information exists in the received map, the map decoder 313 proceeds to step 505 and modifies the already stored UL control region allocation information to the received UL control region allocation information. .

  On the other hand, if there is no UL control region allocation information in the received map, the map decoder 313 proceeds to step 507 and maintains the already stored UL control region allocation information.

  Thereafter, the map decoder 313 proceeds to step 509 to confirm the data burst area information, and then ends this procedure.

  FIG. 6 shows a procedure for generating a resource allocation information message in the base station of the broadband wireless communication system according to the second embodiment of the present invention.

  As shown in FIG. 6, first, the map generator 203 confirms whether or not it is time to generate a map in step 601.

  If it is time to generate the map, the map generator 203 proceeds to step 603 to check the uplink and downlink resource allocation schedules.

  Thereafter, the map generator 203 proceeds to step 605 and compares the UL control region allocation information in the confirmed resource allocation schedule with the recently transmitted UL control region allocation information to confirm whether or not it has been changed. . Here, the UL control region includes a ranging channel, a CQI channel, an ACK channel, and a sounding channel. The CQI channel corresponds to a fast feedback channel.

  When the UL control area allocation information is changed, the map generator 203 proceeds to Step 607 and generates the valid period information of the UL control area allocation information. That is, when transmitting UL control region allocation information periodically, once transmitted, the UL control region allocation information becomes unreliable information after one cycle. Therefore, the map generator 203 generates valid period information to inform the terminal of the cycle.

  Thereafter, the map generator 203 proceeds to step 609 to generate a map message including the changed UL control area allocation information and valid period information. Here, the determination target of whether or not the UL control area allocation information is generated may be the entire UL control area or a part of the UL control area.

  On the other hand, if the UL control area allocation information is not changed in step 605, the map generator 203 proceeds to step 611 and confirms whether or not the period for generating the UL control area allocation information has come. In other words, after transmitting a map that includes UL control region allocation information, check how many times a map that does not include UL control region allocation information has been transmitted, and check whether the number of transmissions matches the above cycle. To do. Here, the above period is a variable determined according to the system setting.

  If it is not the generation period of the UL control region allocation information, the map generator 203 proceeds to Step 613 and generates a map message that does not include the UL control region allocation information.

  FIG. 7 shows a procedure for confirming the resource allocation information message in the terminal of the broadband wireless communication system according to the second embodiment of the present invention.

  As shown in FIG. 7, first, the map decoder 313 confirms whether or not a map is received in step 701.

  When the map is received, the map decoder 313 proceeds to step 703 to check whether UL control region allocation information exists in the received map. Here, the UL control region includes a ranging channel, a CQI channel, an ACK channel, and a sounding channel. The CQI channel corresponds to a fast feedback channel.

  If UL control region allocation information exists in the received map, the map decoder 313 proceeds to step 705 and corrects the already stored UL control region allocation information to the received UL control region allocation information. .

  On the other hand, if there is no UL control area allocation information in the received map, the map decoder 313 proceeds to step 707 to check whether or not the UL control area allocation information previously received is stored. .

  If the previously received UL control area allocation information is stored, the map decoder 313 proceeds to step 709 to check the usage validity period of the stored UL control area allocation information.

  If the UL control region allocation information is valid, the map decoder 313 proceeds to step 711 and maintains the existing UL control region allocation information.

  On the other hand, if the UL control area allocation information is not valid, the map decoder 313 proceeds to step 713 and deletes the existing UL control area allocation information. Here, the reason why the UL control area allocation information is deleted is because the UL control area allocation information that has exceeded the valid period cannot be relied on, and thus the area specified by the UL control area allocation information is not used. As a method other than the above-described deletion method, there is a method for setting a flag (Flag) indicating whether or not the terminal is effective in the terminal, or a method for checking the effective period every time the terminal uses the UL control area. Is possible.

  Thereafter, the map decoder 313 proceeds to step 715 to confirm the data burst area information.

  In the above-described embodiment, the procedure for periodically generating UL control region allocation information and including it in the map message has been described. Here, the map message includes allocation information for the entire UL control area. Also, instead of including allocation information for the entire UL control area, a map message including only allocation information for a specific area (eg, ranging area) in the UL control area can be generated.

  As yet another embodiment of the present invention, there is a method in which an indicator indicating an effective period is provided for each UL control region when map information is generated in a base station. As an example, the CID value included in the UL-MAP_IE can be used as a validity period indicator of the allocation information included in the corresponding UL-MAP_IE. For example, considering the UL-MAP_IE representing the initial ranging area information, if the base station sets the CID included in the UL-MAP_IE representing the initial ranging area information to “0000”, It can be used in the sense that ging area information is valid until it is newly transmitted. If the base station sets the CID included in the UL-MAP_IE representing the initial ranging area to “ffff”, this is valid only in the frame at the time when the initial ranging area information received the UL-MAP_IE. Can be used in the sense of being. That is, the CID included in the UL-MAP_IE can be used to represent the validity period information in the second embodiment described above. In other words, when the CID is “0000”, the valid period is a frame period until the corresponding information is newly received, and when the CID is “ffff”, the valid period is one frame.

  Yet another embodiment of the present invention is a scheme for transmitting UL control area allocation information in a broadcast message. Here, the broadcast message means a broadcast message having a characteristic that every frame is not transmitted. For example, a UCD (Uplink Channel Descript) message to which a TLV (Type Length Value) as shown in Table 1 below is added can be used.

放送メッセージは、表１に表した情報のうち、少なくとも一つのＵＬ制御領域割り当て情報を含むことができる。すなわち、放送メッセージは、レインジング領域（初期レインジング領域、ハンドオーバレインジング領域、周期的レインジング領域、帯域幅要請レインジング領域等）、ＣＱＩがフィードバックされる高速フィードバック領域（Ｆａｓｔ Ｆｅｅｄｂａｃｋ ｒｅｇｉｏｎ）、ハイブリッドＡＲＱの応答信号がフィードバックされるＨＡＲＱ Ａｃｋ領域、サウンディング信号が送信されるサウンディング領域の割り当て情報を含むことができる。このとき、各ＵＬ制御領域割り当て情報は、資源割り当て情報要素（Ａｌｌｏｃａｔｉｏｎ ＩＥ）、ＵＬ制御領域割り当て周期（Ｐｅｒｉｏｄｉｃｉｔｙ）情報、割り当て周期が適用される開始点を指定するための割り当てフェーズ（Ａｌｌｏｃａｔｉｏｎ Ｐｈａｓｅ）情報を含むことができる。ここで、割り当て周期情報は、割り当て周期を２^ｄ個フレームで表現した場合のｄ値で表現されることができ、割り当てフェーズ情報は、フレーム個数で表現されることができる。各ＵＬ制御領域割り当て情報を表１と対比すると、資源割り当て情報は、「Ａｌｌｏｃａｔｉｏｎ ＩＥ」、割り当て周期情報は、「Ｐａｒａｍｅｔｅｒ ｄ ｔｈａｔ ｄｅｆｉｎｅｓ ｐｅｒｉｏｄｉｃｉｔｙ ｉｎ ２＾ｄ Ｆｒａｍｅｓ」、割り当てフェーズ情報は、「Ａｌｌｏｃａｔｉｏｎ ｐｈａｓｅ ｅｘｐｒｅｓｓｅｄ ｉｎ ｆｒａｍｅｓ」と対応される。

The broadcast message may include at least one UL control area allocation information among the information shown in Table 1. That is, the broadcast message includes a ranging area (initial ranging area, handover ranging area, periodic ranging area, bandwidth request ranging area, etc.), a high-speed feedback area (Fast Feedback region) in which CQI is fed back, and a hybrid. HARQ Ack area where an ARQ response signal is fed back, and sounding area allocation information where a sounding signal is transmitted can be included. At this time, each UL control area allocation information includes resource allocation information element (Allocation IE), UL control area allocation period (Periodicity) information, and allocation phase (Allocation Phase) information for specifying a start point to which the allocation period is applied. Can be included. Here, the allocation cycle information can be expressed by a d value when the allocation cycle is expressed by 2 ^d frames, and the allocation phase information can be expressed by the number of frames. When each UL control area allocation information is compared with Table 1, the resource allocation information is “Allocation IE”, the allocation cycle information is “Parameter d that defines periodicity in 2 ^ frames”, and the allocation phase information is “Allocation phase expressed”. in frames ".

  The base station can simultaneously display the UL control area allocation information in the UL map. When the UL control area allocation information of the UCD and the UL control area allocation information of the UL map are different from each other, the terminal reflects information having a higher priority among the both. The priority can be either UCD or UL map. When there is no corresponding TLV in the UCD, the UL control area allocation information is confirmed with reference to the UL map. As described above, when a broadcast message is used, map overhead is reduced, so that the capacity of downlink traffic increases.

  FIG. 8 shows a procedure for confirming the resource allocation information message in the terminal of the broadband wireless communication system according to the third embodiment of the present invention. In the description below, an example will be described in which priority is given to the UL map when the UCD collides with the UL control area allocation information of the UL map.

  As shown in FIG. 8, the map decoder 313 confirms whether a map exists in the frame received in step 801.

  If the map exists, the map decoder 313 proceeds to step 803 to perform CRC (Cyclic Redundancy Checking) of the map to check whether the map is normally received.

  If the map is not normal, the map decoder 313 proceeds to step 805 and controls so that the terminal cannot operate during the corresponding frame.

  On the other hand, if the map is normal, the map decoder 313 proceeds to step 807 and checks whether UL control area allocation information exists in the map.

  If UL control area allocation information exists, the map decoder 313 proceeds to step 809 and changes the UL control area allocation information in use.

  Thereafter, the map decoder 313 proceeds to step 811 to store the changed UL control area allocation information. That is, the already stored UL control area allocation information is updated to new UL control area allocation information.

  If there is no UL control area allocation information in step 803, the map decoder 303 checks in step 813 whether UL control area allocation information exists in the UCD.

  If UL control area allocation information exists in the UCD, the map decoder 313 proceeds to step 811 and stores the UL control area allocation information existing in the UCD. That is, the already stored UL control area allocation information is updated to new UL control area allocation information.

  After storing the UL control area allocation information, the map decoder 313 proceeds to step 815 to acquire a map information element (MAP IE (Information Element)) of the corresponding terminal.

  As described above, among resource allocation information messages transmitted from a base station to a terminal in a broadband wireless communication system, the resource allocation information message in a specific area is periodically transmitted to reduce the size of the resource allocation information message. Thus, the transmission rate of user data can be increased.

  As mentioned above, although specific embodiment was described in detailed description of this invention, of course, various deformation | transformation are possible within the range which does not deviate from the scope of the present invention. Therefore, the scope of the present invention is not limited to the above-described embodiment, but must be determined not only by the claims but also by the equivalents of the claims.

Claims (64)

A base station apparatus in a broadband wireless communication system,
A scheduler for determining whether to generate uplink control region allocation information;
A generator for generating uplink control region allocation information in accordance with the determination of the scheduler.   The apparatus of claim 1, wherein the scheduler determines whether to generate the entire uplink control region or a partial region thereof.   The uplink control region includes at least one of a ranging region, a fast feedback region, a HARQ (Hybrid Automatic Repeat reQuest) response region, and a sounding region. The apparatus according to claim 2.   The apparatus of claim 2, wherein the generator generates the uplink control region allocation information every predetermined period.   The apparatus of claim 2, wherein the generator generates the uplink control region allocation information when the uplink control region allocation information is changed.   When the uplink control region allocation information is changed, the generator generates the uplink control region allocation information continuously during a plurality of frame periods from the time when the uplink control region allocation information is changed. 6. The apparatus of claim 5, wherein:   The apparatus of claim 2, wherein the generator generates uplink control region allocation information including validity period information.   The apparatus of claim 7, wherein the validity period information is related to all or a part of the uplink control region.   The apparatus of claim 7, wherein the validity period information is expressed through a CID included in uplink control region allocation information. An encoder that encodes uplink control region allocation information from the generator;
A modulator for modulating data from the encoder;
A mapper for mapping data from the modulator to predetermined resources;
An OFDM modulator that converts data mapped by IFFT (Inverse Fast Fourier Transform) operation into a baseband signal;
The apparatus according to claim 1, further comprising a transmitter that converts the baseband signal into a signal of an RF (Radio Frequency) band and transmits the signal. A terminal device in a broadband wireless communication system,
A receiver for receiving the resource allocation message;
When the uplink control region allocation information is not included in the resource allocation message, the stored uplink control region allocation information is maintained, and when the uplink control region allocation information is included in the resource allocation message, the existing control information And a decoding unit for updating the stored uplink control region allocation information to the uplink control region allocation information included in the received resource allocation message.   The apparatus of claim 11, wherein the uplink control region includes at least one of a ranging region, a fast feedback region, a HARQ response region, and a sounding region.   The apparatus of claim 11, further comprising: a transmitter that performs signaling according to the stored uplink control region allocation information when the uplink control region allocation information is not included.   The transmission apparatus according to claim 1, further comprising: a transmitter that performs uplink signaling using the uplink control region allocation information included in the received resource allocation message when the uplink control region allocation information is included. 11. The apparatus according to 11.   The apparatus of claim 11, wherein the uplink control region allocation information includes transmission cycle information of the uplink control region allocation information.   The apparatus of claim 11, wherein the uplink control region allocation information includes validity period information.   The apparatus of claim 15, wherein the validity period information is expressed through a CID (Connection IDentifier) included in uplink control region allocation information. The receiving unit converts an RF band signal received via an antenna into a baseband signal; and
An OFDM (Orthogonal Frequency Division Multiplexing) demodulator that converts the baseband signal into frequency domain data by an FFT (Fast Fourier Transform) operation;
A demodulator for demodulating the data to which the resource allocation message is mapped out of the frequency domain data;
12. The apparatus of claim 11, further comprising: a decoder that decodes the demodulated data to generate the resource allocation message. A base station operating method in a broadband wireless communication system, comprising:
A process of determining whether to generate uplink control region allocation information;
Generating uplink control region allocation information according to the determination result of the generation.   The method of claim 19, wherein the determination process determines whether to generate the whole or a part of the uplink control region.   The method of claim 19, wherein the uplink control region includes at least one of a ranging region, a fast feedback region, a HARQ response region, and a sounding region.   The method of claim 19, wherein the generating process generates the uplink control region allocation information for each preset period. The generation process includes:
The method of claim 19, wherein the uplink control region allocation information is generated when the uplink control region allocation information is changed.   The method of claim 23, wherein the uplink control region allocation information is continuously generated during a plurality of frame periods from the time of the change.   The method of claim 19, wherein the uplink control region allocation information includes validity period information.   The method of claim 25, wherein the validity period information relates to all or a part of the uplink control region.   The method of claim 26, wherein the validity period information is expressed through a CID included in uplink control region allocation information. Encoding the uplink control region allocation information;
The process of modulating the encoded data;
Mapping the modulated data to a predetermined resource;
A process of converting data mapped by the IFFT operation into a baseband signal;
The method of claim 19, further comprising: converting the baseband signal into an RF band signal and transmitting the signal. A method for operating a terminal in a broadband wireless communication system, comprising:
When a resource allocation message is received, checking whether uplink control region allocation information is included in the resource allocation message;
If the uplink control region allocation information is not included, maintaining the stored uplink control region allocation information;
Updating the stored uplink control region allocation information with the uplink control region allocation information included in the received resource allocation message when the uplink control region allocation information is included. A method characterized by.   The method of claim 29, wherein the uplink control region includes at least one of a ranging region, a fast feedback region, a HARQ response region, and a sounding region.   30. The method of claim 29, further comprising performing signaling according to the stored uplink control region allocation information when the uplink control region allocation information is not included.   The method according to claim 1, further comprising performing uplink signaling using the uplink control region allocation information included in the received resource allocation message when the uplink control region allocation information is included. Item 30. The method according to Item 29.   The method of claim 29, wherein the uplink control region allocation information includes transmission period information of the uplink control region allocation information.   The method of claim 29, wherein the uplink control region allocation information includes validity period information.   The method of claim 34, wherein the validity period information is expressed through a CID included in uplink control region allocation information. Converting an RF band signal received via an antenna into a baseband signal;
A process of converting the baseband signal into frequency domain data by an FFT operation;
Demodulating data mapped with the resource allocation message among the frequency domain data;
30. The method of claim 29, further comprising: decoding demodulated data to generate the resource allocation message. A base station operating method in a broadband wireless communication system, comprising:
Generating a broadcast message including uplink control region allocation information;
Broadcasting the generated broadcast message at intervals of several frames.   The method of claim 37, wherein the broadcast message is a UCD (Uplink Channel Descriptor) message.   The method of claim 37, wherein the uplink control region includes at least one of a ranging region, a fast feedback region, a HARQ response region, and a sounding region. The uplink control region allocation information is
It includes at least one of resource allocation information (Allocation IE), uplink control region allocation period (Periodicity) information, and allocation phase (Allocation Phase) information for designating a start point to which the allocation period is applied. 38. The method of claim 37. The broadcast process includes:
Encoding the broadcast message;
The process of modulating the encoded data;
Mapping the modulated data to a predetermined resource;
A process of converting data mapped by the IFFT operation into a baseband signal;
The method of claim 37, further comprising: converting the baseband signal into an RF band signal and transmitting the signal. A method for operating a terminal in a broadband wireless communication system, comprising:
Receiving a broadcast message broadcast at intervals of several frames;
Decoding the broadcast message to obtain uplink control region allocation information.   The method of claim 42, wherein the broadcast message is a UCD (Uplink Channel Descriptor) message.   The method of claim 42, wherein the uplink control region includes at least one of a ranging region, a fast feedback region, a HARQ response region, and a sounding region. The uplink control region allocation information is
The method of claim 42, comprising at least one of resource allocation information, uplink control region allocation cycle information, and allocation phase information for designating a starting point to which the allocation cycle is applied. Checking whether the same uplink control region allocation information is included in the map received from the frame that received the broadcast message;
The method further comprises: selecting one of the uplink control region allocation information included in the map and the uplink control region allocation information included in the broadcast message according to priority. Item 43. The method according to Item 42.   The method of claim 42, further comprising obtaining uplink control region allocation information via a map received from a base station when uplink control region allocation information is not present in the broadcast message. . The process of receiving the broadcast message includes converting an RF band signal received via an antenna into a baseband signal,
A process of converting the baseband signal into frequency domain data by an FFT operation;
Demodulating data in which the broadcast message signal is mapped among the frequency domain data;
43. The method of claim 42, further comprising: decoding demodulated data to generate the broadcast message. A base station apparatus in a broadband wireless communication system,
A generator for generating a broadcast message including uplink control region allocation information;
An apparatus comprising: a transmission unit that broadcasts the broadcast message at intervals of several frames.   50. The apparatus of claim 49, wherein the broadcast message is a UCD message.   The apparatus of claim 49, wherein the uplink control region includes at least one of a ranging region, a fast feedback region, a HARQ response region, and a sounding region. The uplink control region allocation information is
The apparatus of claim 49, comprising at least one of resource allocation information, uplink control region allocation cycle information, and allocation phase information for designating a starting point to which the allocation cycle is applied. The transmitter includes an encoder for encoding the broadcast message;
A modulator for modulating data from the encoder;
A mapper for mapping data from the modulator to predetermined resources;
An OFDM modulator that converts data mapped by IFFT operation into a baseband signal;
50. The apparatus according to claim 49, comprising: an RF transmitter that converts a baseband signal into an RF band signal and transmits the signal. A terminal device in a broadband wireless communication system,
A receiver for receiving a broadcast message broadcast at intervals of several frames;
And a decoder for decoding the broadcast message to obtain uplink control region allocation information.   The apparatus of claim 54, wherein the broadcast message is a UCD message.   The apparatus of claim 54, wherein the uplink control region includes at least one of a ranging region, a fast feedback region, a HARQ response region, and a sounding region.   The uplink control region allocation information includes at least one of resource allocation information, uplink control region allocation cycle information, and allocation phase information for designating a start point to which the allocation cycle is applied. 55. The apparatus according to claim 54.   When the same uplink control region allocation information is included in the map received from the frame that received the broadcast message, the decoder includes the uplink control region allocation information included in the map and the broadcast message. 55. The apparatus of claim 54, wherein one of the uplink control region allocation information is selected according to priority.   55. The decoder of claim 54, wherein the decoder obtains uplink control region allocation information via a map received from a base station when uplink control region allocation information is not present in the broadcast message. apparatus.   The transmission apparatus according to claim 59, further comprising: a transmitter that performs signaling according to the stored uplink control region allocation information when the broadcast message and the map do not include the uplink control region allocation information. The device described in 1.   When the uplink control region allocation information is included in the broadcast message or the map, a transmission unit that performs uplink signaling using the uplink control region allocation information included in the broadcast message or the map is further provided. 60. The apparatus of claim 59. The receiving unit converts an RF band signal received via an antenna into a baseband signal; and
An OFDM demodulator that converts the baseband signal into frequency domain data by an FFT operation;
Of the frequency domain data, a demodulator that demodulates data to which the broadcast message is mapped;
55. The apparatus of claim 54, comprising a decoder that decodes demodulated data to generate the broadcast message. A base station operating method in a broadband wireless communication system, comprising:
Generating a broadcast message including uplink control region allocation information and transmission cycle information of the uplink control region allocation information;
Broadcasting the broadcast message to a terminal. A method for operating a terminal in a broadband wireless communication system, comprising:
Receiving a broadcast message including uplink control region allocation information and transmission cycle information of the uplink control region allocation information;
Decoding the broadcast message to obtain the uplink control region allocation information.

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