JP2009130791A - Radio slot assigning method, radio transmission system, and base station device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To assign a radio slot while suppressing, to a minimum, fixed delay to a preferential class such as an UGS (Unsolicited Grant Service) class that performs fixed rate and delay guarantee. <P>SOLUTION: In a radio slot assigning method of assigning a radio slot according to a multiple access system between a base station and a terminal station, for a preferential class which performs fixed rate and delay guarantee, among a plurality of QoS (Quality of Services) classes, a radio slot separated from other QoS classes is provided. When connecting the preferential class, the relevant radio slot is assigned in a fixed manner. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention provides wireless communication for wireless transmission between a base station and a terminal station using an OFDMA (Orthogonal Frequency Division Multiple Access) / TDMA (Time Division Multiple Access) system. The present invention relates to a slot allocation method, a radio transmission system, and a base station apparatus.

  In recent years, OFDMA is used in wireless transmission systems that provide broadband services over a wide area by wireless communication, and also supports multiple QoS (Quality of Services) classes and delay times such as real-time delivery of audio and video. It is possible to support various services from severe applications to best effort.

  FIG. 8 shows a device configuration example of a conventional wireless transmission system. In FIG. 8, a base station 100 includes a transmission buffer 101, a medium access control (MAC) unit 102, a modulation unit 103, a transmission / reception switch (SW) 104 shared with an uplink, and a transmission / reception antenna 105 on a downlink path. A demodulating unit 106, a MAC unit 107, and a receiving buffer 108 are provided on the uplink path. The scheduler 109 inputs downlink queue information and QoS class from the transmission buffer 101, inputs uplink demand information from the uplink MAC unit 107, generates assignment information, gives it to the downlink MAC unit 102, and sets the downlink. Via the terminal station 200.

  The terminal station 200 includes a transmission buffer 201, a MAC unit 202, a modulation unit 203, a SW 204 and a transmission / reception antenna 205 shared with the downlink in the uplink path, and a demodulation unit 206, a MAC unit 207, in the downlink path. A reception buffer 208 is provided. The demand generation unit 209 is configured to input the uplink queue information and the QoS class from the transmission buffer 201, generate the uplink demand information, give it to the uplink MAC unit 202, and notify the base station 100 via the uplink. . Also, the downlink MAC unit 207 is configured to separate the assignment information transmitted from the base station 100 and give it to the uplink MAC unit 202.

  In the downlink, the downlink data of the base station 100 is accumulated in the transmission buffer 101, scheduled based on the downlink queue information and the QoS class, and assigned to the transmission frame. The MAC unit 102 maps each downlink data in accordance with the amount of data in a radio slot that is an area divided by frequency and time in each frame. Modulation section 103 generates an OFDM modulation signal for each symbol and transmits it through SW 104 and transmission / reception antenna 105. The demodulation unit 206 of the terminal station 200 demodulates the received signal input via the transmission / reception antenna 205 and the SW 204, the MAC unit 207 extracts only the downlink data addressed to the own station, temporarily stores it in the reception buffer 208, and stores the QoS class. It classifies every and outputs.

  On the uplink, demand assignment is used for a QoS class that is loose with respect to delay, and an uplink demand is generated from uplink queue information of the amount of data stored in the transmission buffer 201 of the terminal station 200 to generate a base station 100. Send to. When receiving the uplink demand, the scheduler 109 of the base station 100 calculates the allocation of the uplink slot and notifies the terminal station 200 as assignment information. The MAC unit 202 of the terminal station 200 maps the uplink data based on this assignment information. On the other hand, fixed allocation is used for a QoS class (hereinafter referred to as UGS (Unsolicited Grant Service) class) that guarantees a fixed rate and delay, and uplink slots are allocated at a constant cycle without uplink demand.

  Here, a conventional frame configuration is shown in FIG. 9 (Non-Patent Document 1). This frame configuration is a case where TDD is adopted for the duplex method, and is composed of a downlink subframe, TTG (transmission / reception switching gap), uplink subframe, and RTG (reception / transmission switching gap) in the time axis direction. . The downlink subframe is divided into preamble, assignment information, and regions of a plurality of downlink slots, and the uplink frame is divided into regions of an uplink demand and a plurality of uplink slots.

Note that the frequency axis is divided into logical subchannels, and a data area is assigned in combination with a time slot. However, the frequency and time regions of the radio slots assigned to the downlink subframe and uplink subframe have a degree of freedom, and are determined according to the transmission data amount and the transmission path state.
IEEE Std 802.16e-2005, p.357, fig.218

  In the conventional configuration, as described above, the downlink data of the base station and the uplink data of the terminal station are temporarily stored in the transmission buffer without distinction of the QoS class. For example, the QoS is identified by signal processing in units of frames, and the radio slot corresponding thereto Has been assigned. For this reason, in the case of signal processing in units of frames, there is a problem that a processing delay corresponding to the frame size is applied and a transmission delay is increased. In particular, when the delay time affects the communication quality like audio and video, this fixed delay has been a problem.

  The present invention provides a radio slot allocation method, a radio transmission system, and a base station apparatus that enable radio slot allocation with a minimum fixed delay for a priority class such as a UGS class that performs fixed rate and delay guarantee. For the purpose.

  According to a first aspect of the present invention, there is provided a radio slot allocation method for allocating radio slots between a base station and a terminal station using a multiple access method, and a priority class that performs a fixed rate and guarantees a delay among a plurality of QoS classes. A radio slot separated from other QoS classes is provided, and the radio slot is fixedly assigned when the priority class is connected.

  Here, when the OFDMA / TDMA scheme is adopted as the multiple access scheme, a priority class is assigned to a radio slot set in a predetermined time region within the OFDMA frame or a radio slot time-divided by the multizone scheme. Further, when the OFDMA / TDMA scheme is adopted as the multiple access scheme, a priority class is assigned to a radio slot set in a predetermined frequency region in the OFDMA frame or a radio slot divided in frequency by the multizone scheme.

  A second invention is a radio transmission system in which radio slots of downlink subframes and uplink subframes are allocated between a base station and a terminal station, and radio transmission is performed by an OFDMA / TDMA scheme. The downlink data of the priority class that performs fixed rate and delay guarantee among the plurality of QoS classes and the downlink data of the other QoS classes are classified from the downlink data to be transmitted to the QoS class, and the downlink data of the priority class is determined in the OFDMA frame. Assigned to a radio slot set in the time domain / frequency domain, and means for transmitting by assigning downlink data of QoS class other than the priority class to the remaining radio slots, and assigned to the priority class from the received signal from the terminal station Extract radio slots and separate them from radio slots assigned to other QoS classes. The terminal station separately inputs the uplink data of the priority class to be transmitted to the base station and the uplink data of the other QoS class, and inputs the uplink data of the priority class for a predetermined time in the OFDMA frame. Means for assigning and transmitting uplink data of a QoS class other than the priority class to the remaining radio slots and transmitting the radio slots assigned to the priority class from the received signal from the base station. Means for extracting and processing separately from the radio slots assigned to other QoS classes.

  Here, the base station configures a processing unit that assigns the downlink data of the priority class to a radio slot set in a predetermined frequency region in the OFDMA frame, extracts the radio slot assigned to the priority class from the received signal, and processes it. A first chip and a processing unit that allocates downlink data of a QoS class other than the priority class to the remaining radio slots and separates and processes the radio slots allocated to the QoS class other than the priority class from the received signal. The terminal station has a processing unit that assigns priority class uplink data to a radio slot specified in the frequency domain, extracts a radio slot assigned to the priority class from downlink data, and processes the same. The third chip to be configured and the uplink data of the QoS class other than the priority class to the radio slot Ri hit, the fourth chip may be a common chip configuration constituting a processing unit for processing to separate the radio slot assigned to the QoS class other than priority class from the received signal.

  According to a third aspect of the present invention, in a base station apparatus of a wireless transmission system in which wireless slots are allocated between a base station and a terminal station and wireless transmission is performed by an OFDMA / TDMA scheme, a plurality of downlink data transmitted to the terminal station are Means for classifying the downlink data of the priority class that guarantees a fixed rate and delay in the QoS class, the downlink data of other QoS classes, and the radio slot in which the downlink data of the priority class is designated in the time domain / frequency domain Means for allocating and transmitting downlink data of a QoS class other than the priority class to the remaining radio slots, and extracting the radio slot allocated to the priority class from the uplink data received from the terminal station and allocating to other QoS classes And a means for processing separately from the radio slot.

  Here, a first chip constituting a processing unit that assigns downlink data of a priority class to a radio slot specified in the frequency domain, and extracts a radio slot assigned to the priority class from the uplink data, and a QoS class other than the priority class The second chip that constitutes the processing unit that allocates the downlink data to the wireless slot and separates and processes the wireless slot assigned to the QoS class other than the priority class from the received signal may be used as a common chip configuration.

  The present invention provides a wireless slot in a time domain or a frequency domain that is separated from other QoS classes for a priority class that guarantees a fixed rate and delay among a plurality of QoS classes, and when the priority class is connected. The radio slot is fixedly assigned. As a result, it is possible to avoid the processing delay spent in the transmission buffer and the reception buffer for the priority class data, to suppress the transmission delay for the priority class, and to guarantee the delay.

(First embodiment)
FIG. 1 shows an apparatus configuration example according to the first embodiment of the present invention. FIG. 2 shows a frame configuration according to the first embodiment of the present invention.

  The feature of this embodiment is that a dedicated radio slot separated from other QoS classes is prepared in a predetermined time region in an OFDMA frame as shown in FIG. 2 for a UGS class that performs fixed rate and delay guarantee. The wireless slot is fixedly allocated when the UGS class connection is established. For the downlink and uplink radio slots allocated to the UGS class, the allocation period and the allocation amount are determined based on the QoS parameter fixed rate, the guaranteed delay amount, and the like when the connection is established, and the assignment assignment information is fixed. . Further, the assignment information is fixed until the connection is completed or until a setting change request is issued from the base station or the terminal station.

  In FIG. 1, a base station 100 includes a UGS identification unit 110, a transmission buffer 101, a MAC unit 102, a modulation unit 103, a SW 104 shared with an uplink and a transmission / reception antenna 105 in a downlink path. , A demodulation unit 106, a MAC unit 107, a reception buffer 108, and a UGS insertion unit 111.

  The UGS identifying unit 110 identifies the UGS class and other QoS classes for the input downlink data, and directly inputs the UGS class downlink data to the MAC unit 102. Further, downlink data other than the UGS class is accumulated in the transmission buffer 101, and the amount of data to be allocated to the next frame to be transmitted is calculated based on parameters set in priority control, bandwidth guarantee, and the like. The MAC unit 102 allocates UGS class downlink data to radio slots allocated to the UGS class at the time of connection, and allocates QoS class downlink data other than the UGS class to the remaining radio slots. The scheduler 109 inputs downlink queue information and QoS class other than UGS class from the transmission buffer 101, inputs uplink demand information from the uplink MAC unit 107, generates assignment information, and gives it to the downlink MAC unit 102 The terminal station 200 is notified via the downlink.

  The uplink MAC unit 107 extracts the radio slot designated by the UGS class in the uplink reception frame based on the assignment information assigned to the UGS class when the connection is established, and the UGS insertion unit without using the reception buffer 108 Input to 111. Further, uplink data other than the UGS class is accumulated in the reception buffer 108 and is output together with the UGS class uplink data by the UGS insertion unit 111.

  The terminal station 200 includes a transmission buffer 201, a MAC unit 202, a modulation unit 203, a SW 204 and a transmission / reception antenna 205 shared with the downlink in the uplink path, and a demodulation unit 206, a MAC unit 207, in the downlink path. A reception buffer 208 is provided.

  The downlink MAC unit 207 extracts the radio slot designated by the UGS class in the downlink reception frame based on the assignment information assigned to the UGS class at the time of connection connection, and outputs it without passing through the reception buffer 205. Similarly, the uplink data of the UGS class is directly input to the MAC unit 202 without going through the transmission buffer 201, and the uplink data is allocated to the radio slot allocated to the UGS class when the connection is established.

  The demand generation unit 209 receives the QoS class other than the UGS class and the uplink queue information from the transmission buffer 201, generates the uplink demand information, gives it to the uplink MAC unit 202, and notifies the base station 100 via the uplink It is the structure to do. Also, the downlink MAC unit 207 is configured to separate the assignment information transmitted from the base station 100 and give it to the uplink MAC unit 202.

(Second Embodiment)
FIG. 3 shows the frame configuration of the second embodiment of the present invention. FIG. 4 shows a device configuration example of the second embodiment of the present invention.

  The feature of this embodiment is that a dedicated radio slot separated from other QoS classes is prepared in a predetermined frequency region within an OFDMA frame as shown in FIG. 3 for a UGS class that performs fixed rate and delay guarantee. The wireless slot is fixedly allocated when the UGS class connection is established.

  In FIG. 4, the apparatus configuration of this embodiment is similar to the first embodiment, in which the base station 100 does not input UGS class downlink data to the transmission buffer 101 and inputs UGS class uplink data to the reception buffer 108. In the terminal station 200, the UGS class downlink data is processed without being input to the reception buffer 208, and the UGS class uplink data is processed without being input to the transmission buffer 201. However, in this embodiment, in order to assign a UGS class to a radio slot in a predetermined frequency region within an OFDMA frame, the base station 100 includes a UGS transmitter and a UGS receiver, and the terminal station 200 includes a UGS transmitter. And a UGS receiver.

  In the downlink, the UGS class downlink data of the base station 100 is identified by the UGS identification unit 110 and input to the MAC unit 112 and the modulation unit 113 forming the UGS transmission unit. The MAC unit 112 assigns UGS class downlink data to a radio slot in the frequency domain designated by the scheduler 109 when the UGS class connection is connected, and the modulation unit 113 generates a modulated signal of only this frequency. On the other hand, downlink data other than the UGS class is accumulated in the transmission buffer 101, and the amount of data allocated to the next frame to be transmitted is calculated based on parameters set in priority control, bandwidth guarantee, and the like. The MAC unit 102 allocates QoS class downlink data other than the UGS class to radio slots other than the frequency region to which UGS class downlink data is allocated, and the modulation unit 103 generates a modulated signal. The modulation signals corresponding to the downlink data of the UGS class and QoS classes other than the UGS class are combined by the combining unit 114 to generate a transmission signal and transmitted via the SW 104 and the transmission / reception antenna 105. The received signal of the terminal station 200 is input to the demodulating unit 215 and the MAC unit 216 that form the UGS receiving unit, and only the frequency region designated for UGS is demodulated and output as UGS class downlink data.

  On the uplink, the UGS class uplink data of the terminal station 200 is input to the MAC unit 212 and the modulation unit 213 forming the UGS transmission unit. The MAC unit 212 assigns UGS class uplink data to a radio slot in the frequency domain specified when the UGS class connection is connected, and the modulation unit 213 generates a modulation signal of only this frequency. On the other hand, uplink data other than the UGS class is accumulated in the transmission buffer 201, and the amount of data allocated to the frame to be transmitted next is calculated based on parameters set in priority control, bandwidth guarantee, and the like. The MAC unit 202 assigns QoS class uplink data other than the UGS class to radio slots other than the frequency region to which UGS class uplink data is assigned, and the modulation unit 203 generates a modulated signal. Modulated signals corresponding to uplink data of UGS class and QoS classes other than UGS class are combined by combining section 214 to generate a transmission signal and transmitted via SW 204 and transmission / reception antenna 205. The received signal of the base station 100 is input to the demodulating unit 115 and the MAC unit 116 that form the UGS receiving unit, and only the frequency region designated for UGS is demodulated, and is transmitted to the UGS inserting unit 118 as UGS class uplink data. Is output. The UGS insertion unit 118 outputs the uplink data of the QoS class other than the UGS class and the UGS class together.

  The exchange of uplink demand information and assignment information between the base station 100 and the terminal station 200 and other processes are the same as those in the first embodiment.

(Third embodiment)
FIG. 5 shows a device configuration example of the third embodiment of the present invention.
The device configurations of the base station 100 and the terminal station 200 in the present embodiment are obtained by changing the layouts of the UGS class processing system and the QoS class processing system other than the UGS class in the second embodiment. 1 illustrates a configuration in which a standard chip including a MAC unit and a modulation / demodulation unit can be used for UGS class transmission.

  Here, the standard chip in the base station 100 includes a transmission buffer 101, a MAC unit 102, a modulation unit 103, a demodulation unit 106, a MAC unit 107, a reception buffer 108, and a scheduler 109. Similarly, the standard chip for UGS includes a transmission buffer 111, a MAC unit 112, a modulation unit 113, a demodulation unit 115, a MAC unit 116, and a reception buffer 117. Assignment information used in the MAC units 112 and 116 is other than the UGS class. It is configured to input from the standard chip scheduler 109 used in the QoS class.

  The standard chip in the terminal station 200 includes a transmission buffer 201, a MAC unit 202, a modulation unit 203, a demodulation unit 206, a MAC unit 207, a reception buffer 208, and a demand generation unit 209. Similarly, the standard chip for UGS includes a transmission buffer 211, a MAC unit 212, a modulation unit 213, a demodulation unit 215, a MAC unit 216, and a reception buffer 217, and assignment information used in the MAC units 212 and 216 is other than the UGS class. Input from the MAC unit 207 of the standard chip used in the QoS class.

  In the UGS standard chip, the transmission buffers 111 and 211 and the reception buffers 117 and 217 have a reduced buffer size to eliminate delay due to accumulation. With such a configuration, it is possible to use a standard chip for reducing the delay of the UGS class, and there is an advantage that it is not necessary to newly form a linear chip for the UGS class.

(Fourth embodiment)
FIG. 6 shows the frame configuration of the fourth embodiment of the present invention.
In the IEEE802.16e-2005 standard, multiple zones (areas with different subchannel allocation methods such as FUSC (Fully Used Subchannelization), PUSC (Partially Used Subchannelization), Optional FUSC, Optional PUSC, AMC (Adaptive Modulation and Coding)) are used. It is possible to simultaneously allocate within the same subframe. This makes it possible to provide a variety of subchannel assignments according to the environmental conditions of the terminal stations under the cell. Note that when multi-zone is applied to the downlink, a maximum of 8 zones are set in one subframe. In the present embodiment, as an example of a method for assigning the UGS class of the first embodiment to a radio slot in the time domain, an example in which the time division in the multi-zone frame is used is shown.

(Fifth embodiment)
FIG. 7 shows a frame configuration according to the fifth embodiment of the present invention.
In this embodiment, as a method of assigning the UGS class of the second and third embodiments to the radio slot in the frequency domain, the segment division in the IEEE802.16e-2005 standard is used for the used frequency division in the downlink subframe, and the Band -An example of using AMC for uplink subframes is shown.

The figure which shows the apparatus structural example of the 1st Embodiment of this invention. The figure which shows the flame | frame structure of the 1st Embodiment of this invention. The figure which shows the flame | frame structure of the 2nd Embodiment of this invention. The figure which shows the apparatus structural example of the 2nd Embodiment of this invention. The figure which shows the apparatus structural example of the 3rd Embodiment of this invention. The figure which shows the flame | frame structure of the 4th Embodiment of this invention. The figure which shows the flame | frame structure of the 5th Embodiment of this invention. The figure which shows the apparatus structural example of the conventional wireless transmission system. The figure which shows the conventional frame structure.

Explanation of symbols

100 base station 101, 111 transmission buffer 102, 107, 112, 116 MAC (medium access control) unit 103, 113 modulation unit 104 SW (transmission / reception switch)
105 Transmission / reception antenna 106, 115 Demodulation unit 108, 117 Reception buffer 109 Scheduler 110 UGS identification unit 114 Coupling unit 118 UGS insertion unit 200 Terminal station 201, 211 Transmission buffer 202, 207, 212, 216 MAC (medium access control) unit 203, 213 Modulation unit 204 SW (Transmission / reception switch)
205 Transmit / receive antenna 206, 215 Demodulator 208, 217 Receive buffer 209 Demand generator 214 Combiner

Claims (9)

In a radio slot allocation method for performing radio slot allocation by a multiple access method between a base station and a terminal station,
A wireless slot separated from other QoS classes is provided for a priority class that guarantees a fixed rate and delay is guaranteed among a plurality of QoS classes, and the wireless slot is fixedly assigned when a connection of this priority class is established. A wireless slot allocation method. The radio slot allocation method according to claim 1,
When the OFDMA / TDMA scheme is adopted as the multiple access scheme, the priority class is assigned to a radio slot set in a predetermined time region within an OFDMA frame or a radio slot that is time-divided by a multizone scheme. Slot allocation method. The radio slot allocation method according to claim 1,
When the OFDMA / TDMA scheme is adopted as the multiple access scheme, the priority class is allocated to a radio slot set in a predetermined frequency region in an OFDMA frame or a radio slot divided in frequency by the multizone scheme. Slot allocation method. In a radio transmission system in which radio slots are allocated for downlink subframes and uplink subframes between a base station and a terminal station, and radio transmission is performed using the OFDMA / TDMA scheme,
The base station classifies, from downlink data transmitted to the terminal station, downlink data of a priority class that performs fixed rate and delay guarantee among a plurality of QoS classes and downlink data of other QoS classes, and the priority class Means for assigning and transmitting downlink data of a QoS class other than the priority class to the remaining radio slots and transmitting to the radio slots set in a predetermined time region in the OFDMA frame, and a received signal from the terminal station Means for extracting a radio slot assigned to the priority class from and processing separately from radio slots assigned to other QoS classes;
The terminal station separately inputs the uplink data of the priority class to be transmitted to the base station and the uplink data of other QoS classes, and sets the uplink data of the priority class in a predetermined time region in the OFDMA frame Means for allocating and transmitting uplink data of QoS class other than the priority class to the remaining radio slots, extracting the radio slot allocated to the priority class from the received signal from the base station, and others A wireless transmission system comprising: a wireless slot allocated to the QoS class of the first communication unit; In a radio transmission system in which radio slots are allocated for downlink subframes and uplink subframes between a base station and a terminal station, and radio transmission is performed using the OFDMA / TDMA scheme,
The base station classifies, from downlink data transmitted to the terminal station, downlink data of a priority class that performs fixed rate and delay guarantee among a plurality of QoS classes and downlink data of other QoS classes, and the priority class Means for assigning downlink data of a QoS class other than the priority class to the remaining radio slots and transmitting them to a radio slot set in a predetermined frequency region in the OFDMA frame, and a received signal from the terminal station Means for extracting a radio slot assigned to the priority class from the other and processing separately from radio slots assigned to other QoS classes,
The terminal station separately inputs the uplink data of the priority class to be transmitted to the base station and the uplink data of other QoS classes, and sets the uplink data of the priority class in a predetermined frequency region in the OFDMA frame Means for allocating and transmitting uplink data of QoS class other than the priority class to the remaining radio slots, extracting the radio slot allocated to the priority class from the received signal from the base station, and others A wireless transmission system comprising: a wireless slot allocated to the QoS class of the first communication unit; The wireless transmission system according to claim 5, wherein
The base station allocates the downlink data of the priority class to a radio slot set in a predetermined frequency region in an OFDMA frame, and configures a processing unit that extracts and processes the radio slot allocated to the priority class from the received signal And a processing unit that allocates downlink data of a QoS class other than the priority class to the remaining radio slots and separates and processes a radio slot allocated to a QoS class other than the priority class from the received signal. A second chip constituting the common chip configuration,
The terminal station allocates the uplink data of the priority class to a radio slot specified in a frequency domain, and extracts a radio slot assigned to the priority class from the downlink data and processes the third chip. And a fourth chip constituting a processing unit that allocates uplink data of a QoS class other than the priority class to a radio slot, and separates and processes a radio slot assigned to a QoS class other than the priority class from the received signal A wireless transmission system characterized by having a common chip configuration. In a base station apparatus of a radio transmission system that performs radio transmission by OFDMA / TDMA scheme by assigning radio slots between a base station and a terminal station,
Means for classifying, from downlink data to be transmitted to the terminal station, downlink data of a priority class that performs fixed rate and delay guarantee among a plurality of QoS classes, and downlink data of other QoS classes;
Means for allocating downlink data of the priority class to radio slots designated in the time domain, and allocating and transmitting downlink data of QoS classes other than the priority class to the remaining radio slots;
A base station apparatus comprising: means for extracting a radio slot assigned to the priority class from uplink data received from the terminal station, and processing separately from a radio slot assigned to another QoS class . In a base station apparatus of a wireless transmission system that assigns wireless slots between a base station and a terminal station and performs wireless transmission by the OFDMA / TDMA scheme,
Means for classifying, from downlink data to be transmitted to the terminal station, downlink data of a priority class that performs fixed rate and delay guarantee among a plurality of QoS classes, and downlink data of other QoS classes;
Means for allocating downlink data of the priority class to radio slots designated in the frequency domain, and allocating and transmitting downlink data of QoS classes other than the priority class to the remaining radio slots;
A base station apparatus comprising: means for extracting a radio slot assigned to the priority class from uplink data received from the terminal station, and processing separately from a radio slot assigned to another QoS class . The base station apparatus according to claim 8, wherein
A first chip constituting a processing unit that assigns downlink data of the priority class to a radio slot specified in a frequency domain, and extracts a radio slot assigned to the priority class from the uplink data; and QoS other than the priority class The second chip constituting the processing unit that assigns the class downlink data to the radio slot and separates and processes the radio slot assigned to the QoS class other than the priority class from the received signal has a common chip configuration. A base station apparatus characterized by the above.

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