JP2009060438A - Communication method and base station apparatus using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of wave-form patterns to be designated for one terminal device even if coping with a plurality of radio systems. <P>SOLUTION: An IF section 106 accepts a notice of reception including an identification number for identifying a terminal device as a destination from a wired network. Information on a radio system corresponding to the terminal device is associated with the identification number accepted by the IF section 106. A ranging process section 110 generates a reception signal based on at least the identification number in the accepted reception notice while reflecting the information on the radio system corresponding to the terminal device. A modulating section 103, a transmitting section 102, a radio section 101 and an antenna 100 notifies a radio network of the generated reception signal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a radio communication technique, and more particularly to a communication method for allocating a channel to a terminal apparatus to communicate with and a base station apparatus using the communication method.

In a mobile communication system such as a second generation cordless telephone system, a logical control channel (hereinafter referred to as “LCCH”) is defined. A base station device (CS: Cell Station) performs communication by assigning a time slot, which is a unit of communication, to a terminal device (PS: Personal Station). When the conventional LCCH has a grouping number of 8, the broadcast channel (hereinafter referred to as “BCCH”), 8 incoming information channels (hereinafter referred to as “PCH”), and 3 channel allocation control channels (hereinafter referred to as “SCCH”). ")) And a total of 12 channels. The base station apparatus intermittently transmits each channel at intervals of 20 frames (see, for example, Non-Patent Document 1). One frame is composed of eight time slots.
ARIB STANDARD RCR STD-28-1 “Second Generation Cordless Telephone System Standard”, 4.1, (1/2 volume)

  In the mobile communication system as described above, in order to increase the communication capacity of the base station apparatus, the base station apparatus performs orthogonal frequency division multiplexing (OFDMA). When there is an incoming call to the terminal device, the base station device transmits the PCH including a number for identifying the terminal device with the incoming call (hereinafter referred to as “terminal number”). When receiving the PCH, the terminal device confirms whether its own terminal number is included in the PCH. If included, the terminal device transmits an initial ranging request to the base station device. At this time, if a collision occurs between the initial ranging request transmitted from another terminal device and the transmitted initial ranging request, retransmission of the initial ranging occurs, and the response to the incoming call becomes longer. One method for reducing the probability of such a collision is to specify a plurality of types of waveform patterns while being orthogonal to each other as a request for initial ranging. In particular, when the base station apparatus transmits a PCH, if a waveform pattern to be used in the initial ranging request is specified and the specified waveform pattern is received preferentially, the probability of collision is further reduced.

  In addition to a terminal device capable of handling a multicarrier signal such as OFDMA, a terminal device capable of handling a single carrier signal may be connected to the base station device of the mobile communication system. At that time, in order to reduce the above-described collision probability, the base station device supports a single carrier signal and a waveform pattern in the case of supporting a multicarrier signal for one terminal device when transmitting PCH. The waveform pattern should be notified. That is, two waveform patterns are reserved for one terminal device. Generally, since the number of waveform patterns orthogonal to each other is limited, it is desirable that the number of waveform patterns to be reserved for one terminal apparatus is small.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a technique for reducing the number of waveform patterns to be specified for one terminal device even when supporting a plurality of wireless systems. And

  In order to solve the above problems, a base station apparatus according to an aspect of the present invention includes a reception unit that receives an incoming notification including an identification number for identifying a terminal device that is a target of an incoming call from a wired network, and a reception unit Of the incoming call notification received in step (2), a generation unit that generates an incoming signal based on at least the identification number, and a notification unit that notifies the wireless network of the incoming signal generated in the generation unit. The identification number received by the reception unit is added with information on the wireless system corresponding to the terminal device, and the generation unit generates the incoming signal while reflecting the information on the wireless method corresponding to the terminal device.

  Another aspect of the present invention is a communication method. This method includes a step of receiving an incoming notification including an identification number for identifying a terminal device that is an incoming call from a wired network, and an incoming signal is received based on at least the identification number of the received incoming notifications. And a step of notifying the generated incoming signal to the wireless network. The identification number received in the accepting step is added with information related to the wireless system corresponding to the terminal device, and the generating step generates an incoming signal while reflecting the information related to the wireless method corresponding to the terminal device.

  It should be noted that any combination of the above-described constituent elements and a conversion of the expression of the present invention between a method, an apparatus, a system, a recording medium, a computer program, etc. are also effective as an aspect of the present invention.

  According to the present invention, it is possible to reduce the number of waveform patterns to be specified for one terminal device even when supporting a plurality of wireless systems.

  Before describing the present invention in detail, an outline will be described. Embodiments of the present invention relate to a communication system including a control device, a base station device, and a terminal device. In the communication system, each frame is formed by time-division multiplexing a plurality of time slots, and each time slot is formed by frequency-division multiplexing a plurality of subchannels. Each subchannel is formed by a multicarrier signal. Here, OFDM signals are used as multicarrier signals, and OFDMA is used as frequency division multiplexing. The subchannel in which the control signal is arranged (hereinafter referred to as “control channel”) and the subchannel in which the data signal is arranged are separately defined. For example, the control channel is defined for the communication system. It is arranged in the subchannel of the lowest frequency in the frequency band.

  One of the control signals is a paging signal. When the base station apparatus receives an incoming call notification from a control apparatus connected via a wired network, the base station apparatus notifies the paging signal. Here, the paging signal includes a terminal number. When the terminal device detects its own terminal number in the paging signal, the terminal device transmits an initial ranging request to the base station device. Here, the initial ranging request may be repeatedly transmitted from a plurality of terminal devices. At that time, in order to reduce the collision probability of the initial ranging, a plurality of types of waveform patterns are defined as the initial ranging request. Here, the plurality of types of waveform patterns are orthogonal to each other. The terminal device selects and uses one of a plurality of types of waveform patterns, but the base station device executes the following processing in order to connect the incoming terminal device with priority.

  When the base station apparatus includes the terminal number in the paging signal, the base station apparatus also includes a number (hereinafter, “pattern number”) for identifying a waveform pattern to be used in the initial ranging request. The terminal device corresponding to the terminal number transmits an initial ranging request while using the waveform pattern of the designated pattern number. Note that the terminal device not corresponding to the terminal number does not use the waveform pattern of the pattern number. When the base station apparatus receives a plurality of waveform patterns, the base station apparatus preferentially receives the waveform pattern designated by the paging signal.

  Furthermore, in addition to terminal devices that transmit OFDM signals within subchannels, there are also terminal devices that transmit single carrier signals (hereinafter referred to as “SC signals”) within subchannels. The base station apparatus defines a plurality of types of waveform patterns for each of the OFDM signal and the SC signal. Therefore, when transmitting the paging signal, the base station apparatus associates the waveform pattern of the OFDM signal with the waveform pattern of the SC signal while associating with one terminal number. That is, the base station apparatus has two waveform patterns in preparation for the case where the terminal apparatus transmits an OFDM signal and the case where the terminal apparatus transmits an SC signal, although the waveform pattern actually used is one. Reserve the waveform pattern. As a result, the types of waveform patterns that can be used in other base station apparatuses are reduced. In order to cope with this, the control device manages the type of the radio system of the terminal device, that is, whether to transmit the OFDM signal or the SC signal, in association with the terminal number. Further, when an incoming call notification is transmitted from the control signal to the base station apparatus, information related to the type of radio system is also included in the incoming call notification. The base station apparatus identifies either the waveform pattern of the OFDM signal or the waveform pattern of the SC signal from the information regarding the type of radio system.

  FIG. 1 shows a configuration of a paging area in a communication system 20 according to an embodiment of the present invention. An embodiment of the present invention relates to a base station apparatus that connects a plurality of terminal apparatuses by a TDMA-TDD (Time Division Multiple Access-Time Division Duplex) system as in a second generation cordless telephone system. FIG. 1 includes the first base station apparatus (shown as “CS1” in the figure) to the eighth base station apparatus (shown as “CS8” in the figure). In FIG. 1, the service area formed by each base station apparatus is indicated by a solid oval. FIG. 1 shows a paging area (shown as “PA1” in the figure) composed of the first base station apparatus to the fourth base station apparatus, and a fifth base station apparatus to the eighth base station apparatus. The paging area (shown as “PA2” in the figure) is indicated by a dotted ellipse. In the paging area, simultaneous calls are made for location registration and incoming call notification.

  FIG. 2 shows a configuration of the communication system 20 according to the embodiment of the present invention. The communication system 20 includes a base station apparatus 1, a first terminal apparatus 2 a, a second terminal apparatus 2 b, a third terminal apparatus 2 c, a network 50, and a control station 52 that are collectively referred to as a terminal apparatus 2. In FIG. 2, three terminal devices 2 are shown, but two or less or four or more terminal devices 2 may exist. Further, the base station apparatus 1 corresponds to one of the base station apparatuses shown in FIG. Here, there are at least two types of devices as the terminal device 2. One is a terminal apparatus 2 that transmits an OFDM signal, and the other is a terminal apparatus 2 that transmits an SC signal.

  The control station 52 is connected to the base station device 1 via the network 50. The control station 52 executes location registration for the terminal device 2. The location registration is management of which paging area the terminal apparatus 2 is included in, but since a known technique may be used for location registration, description thereof is omitted here. Further, the control station 52 receives an incoming call notification for the terminal device 2 from an exchange (not shown) or the like. Based on the result of the location registration, the control station 52 specifies in which paging area the terminal apparatus 2 corresponding to the incoming call notification is included. Furthermore, the control station 52 transmits an incoming call notification to the base station apparatus 1 belonging to the paging area. For example, when the specified paging area is PA1 in FIG. 1, the control station 52 transmits an incoming call notification from the first base station apparatus 1a to the fourth base station apparatus 1d.

  The control station 52 stores in advance information about whether each terminal apparatus 2 transmits an OFDM signal or an SC signal (hereinafter referred to as “radio scheme information”). Further, the control station 52 adds the radio system information of the corresponding terminal device 2 when transmitting the incoming call notification. Details of the radio system information will be described later. The base station device 1 that has received the incoming notification generates PCH as an incoming signal for notifying the terminal device 2 of the incoming call. Thereafter, the base station apparatus 1 transmits PCH.

  FIG. 3 shows a configuration of a TDMA frame in the communication system 20. In the communication system 20, as in the second generation cordless telephone system, a frame is constituted by four time slots for uplink communication and four time slots for downlink communication. Furthermore, the frames are continuously arranged. In the present embodiment, time slot allocation in uplink communication and time slot allocation in downlink communication are the same, and therefore only downlink communication may be described below for convenience of explanation.

  FIG. 4 shows a configuration of the OFDMA subchannel in the communication system 20. In addition to the TDMA described so far, the base station apparatus 1 further applies OFDMA as shown in FIG. As a result, a plurality of terminal devices are assigned to one time slot. FIG. 4 shows the arrangement of time slots on the time axis in the direction of the horizontal axis, and the arrangement of subchannels on the frequency axis in the direction of the vertical axis. That is, multiplexing on the horizontal axis corresponds to TDMA, and multiplexing on the vertical axis corresponds to OFDMA. Here, the first time slot (shown as “T1” in the figure) to the fourth time slot (shown as “T4” in the figure) in one frame are included. For example, T1 to T4 in FIG. 4 correspond to the fifth to eighth time slots in FIG. 3, respectively.

  Each time slot includes the first subchannel (shown as “SC1” in the figure) to the 16th subchannel (shown as “SC16” in the figure). In FIG. 4, the first terminal apparatus 2a is allocated to the second subchannel of the first time slot, and the second terminal apparatus 2b is allocated to the second subchannel to the fourth subchannel of the second time slot. Also, the third terminal apparatus 2c is allocated to the 16th subchannel of the third time slot, and the fourth terminal apparatus 2d is allocated to the 13th to 15th subchannels of the fourth time slot. Furthermore, in FIG. 4, the first subchannel is reserved as a control channel dedicated subchannel. In the figure, the first base station apparatus 1a assigns a control channel to the first subchannel of the first time slot. That is, the frame configuration when focusing only on SC1 and a set of a plurality of frames correspond to the LCCH.

  FIG. 5 shows a configuration of subchannel blocks in the communication system 20. The subchannel block corresponds to a radio channel specified by a time slot and a subchannel. The horizontal direction in FIG. 5 is the time axis, and the vertical direction is the frequency axis. The numbers “1” to “29” correspond to subcarrier numbers. In this way, the subchannel is configured by an OFDM multicarrier signal. In the figure, “TS” corresponds to a training symbol and includes known signals such as a synchronization detection symbol “STS” (not shown) and a transmission path characteristic estimation symbol “LTS”. “GS” corresponds to a guard symbol, and no effective signal is arranged here. “PS” corresponds to a pilot symbol and is configured by a known signal. “SS” corresponds to a signal symbol, and a control signal is arranged. “DS” corresponds to a data symbol and is data to be transmitted. “GT” corresponds to a guard time, and no effective signal is arranged.

  FIG. 6 shows the configuration of the logical control channel in the communication system 20. The logical control channel is composed of a total of 24 channels including 4 BCCHs, 12 IRCHs, and 8 PCHs. Each of BCCH, IRCH, and PCH is composed of eight TDMA frames (hereinafter referred to as “frames”). One frame is configured as shown in FIG. In FIG. 6, for convenience, a frame in which PCH, BCCH, and IRCH are arranged is also indicated as “PCH”, “BCCH”, and “IRCH”. As described above, a frame is divided into a plurality of time slots. Here, “PCH”, “BCCH” are used without distinguishing each of a time slot unit, a frame unit, and an 8-frame unit. ”And“ IRCH ”.

  In the figure, “IRCH” is an initial ranging channel used at the time of channel allocation. More specifically, “IRCH” includes “TCCH” and “IRCH”, and “TCCH” corresponds to a request for initial ranging transmitted from the terminal apparatus to the base station apparatus. . “IRCH” corresponds to a response to the initial ranging request. Therefore, “TCCH” is an uplink signal, and “IRCH” is a downlink signal (hereinafter, a combination of TCCH and IRCH is also referred to as IRCH, but is used without distinction from the case of IRCH alone. ). In addition, although the base station apparatus which received TCCH from a terminal device performs the ranging process, since the ranging process may be a well-known technique, description is abbreviate | omitted here.

  The lower part of the figure shows the configuration of each frame, which is shown in the same manner as in FIG. CS1 in FIG. 1 intermittently transmits BCCH, IRCH, and PCH at intervals of 8 frames in a time slot (indicated as “CS1” in the figure) to which an LCCH is allocated among time slots constituting a frame. That is, the first base station apparatus 1a uses the fifth time slot of the first frame among the eight frames constituting the BCCH, and the fifth time slot of the first frame among the eight frames constituting the IRCH. Is used. Further, the first base station apparatus 1a uses the fifth time slot of the first frame among the eight frames constituting the PCH. 1 is the same as the time slot used by the base station apparatus 1 in the time slot of the next frame (second frame in the figure) transmitted by the base station apparatus 1. BCCH, IRCH, and PCH are intermittently transmitted at intervals of 8 frames in a slot (indicated as “CS2” in the figure). With such a configuration, it is possible to multiplex up to eight base station apparatuses and a maximum of 32 base station apparatuses for every four downlink time slots constituting the frame.

  FIG. 7 also shows the configuration of the logical control channel in the communication system 20. FIG. 7 corresponds to a more detailed configuration of the IRCH in FIG. 6, particularly the TCCH configuration. Therefore, the arrangement of BCCH, IRCH, PCH, and TCCH in FIG. 7 is the same as the arrangement in FIG. Here, only frames related to one base station apparatus 1 are shown. That is, FIG. 7 corresponds to the LCCH configuration formed by extracting only the time slots assigned to one base station apparatus 1 and forming the extracted time slots. Further, TCCH [A] and TCCH [B] are defined as TCCH. Here, TCCH [B] is defined to be arranged in a frame immediately after PCH. Note that TCCH [B] may not be a frame immediately after PCH but may be the next frame or a plurality of frames. Note that TCCH [A] and TCCH [B] will be described later.

  FIG. 8 is a diagram showing the configuration of the PSID received from the control station 52 in the communication system 20. The PSID is included in the above-described incoming notification and corresponds to an identification number for identifying the terminal device 2 that has received the incoming call. Further, as described above, the wireless method information is added to the PSID. For example, “0” in the radio system information indicates that the terminal apparatus 2 transmits an OFDM signal, and “1” in the radio system information indicates that the terminal apparatus 2 transmits an SC signal. When receiving the incoming call notification, the base station apparatus 1 extracts the terminal number and the radio system information, and generates the PCH based on them. The configuration of the PCH will be described later.

  FIG. 9 shows the configuration of the base station apparatus 1. The base station apparatus 1 includes an antenna 100, a radio unit 101, a transmission unit 102, a modulation unit 103, a reception unit 104, a demodulation unit 105, an IF unit 106, and a control unit 107. The control unit 107 includes a ranging processing unit 110 and an allocation unit. Part 112 is included. The antenna 100 transmits and receives radio frequency signals. Here, radio frequency signals correspond to FIGS. 3 to 5. As a reception process, radio section 101 performs frequency conversion on a radio frequency signal received by antenna 100, derives a baseband signal, and outputs the baseband signal to reception section 104. In addition, as a transmission process, the radio unit 101 performs frequency conversion on the baseband signal from the transmission unit 102, derives a radio frequency signal, and outputs the signal to the antenna 100. Since a baseband signal is generally formed by an in-phase component and a quadrature component, two signal lines should be shown, but for the sake of clarity, only one signal line is shown here. It shall be shown.

  The transmission unit 102 converts the frequency domain signal transmitted from the modulation unit 103 into a time domain signal and outputs the time domain signal to the radio unit 101. In addition, IFFT (Inverted Fast Fourier Transform) is used for the conversion from the frequency domain signal to the time domain signal. Modulation section 103 modulates the input from IF section 106 and outputs the result to transmission section 102. As a modulation method, BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), 32QAM, 64QAM, 256QAM, and the like are used.

  The reception unit 104 converts the time domain signal transmitted from the radio unit 101 into a frequency domain signal and outputs the frequency domain signal to the demodulation unit 105. Note that FFT (Fast Fourier Transform) is used for the conversion from the time domain signal to the frequency domain signal. Demodulation section 105 demodulates the input from receiving section 104 and outputs the result to IF section 106. Demodulation corresponds to modulation. The IF unit 106 is connected to a network (not shown), and outputs a signal demodulated by the demodulation unit 105 to a network (not shown) as reception processing. Further, the IF unit 106 inputs data from the network as a transmission process, and outputs the data to the modulation unit 103. The IF unit 106 receives an incoming call notification from the control station 52 (not shown) via the network 50 (not shown). The incoming call notification is formed as shown in FIG. 8 and includes a PSID for identifying the terminal device 2 that is the target of the incoming call. Further, as described above, the wireless system information corresponding to the terminal device 2 that is the target of the incoming call is added to the PSID. The IF unit 106 outputs the received incoming call notification to the control unit 107.

  The control unit 107 controls the timing of the entire base station apparatus 1. Moreover, the control part 107 comprises LCCH shown in FIG. 6, FIG. 7, and transmits to the terminal device 2 intermittently. The ranging processing unit 110 controls the timing at which LCCH such as BCCH is sequentially transmitted from the modulation unit 103, the transmission unit 102, the radio unit 101, and the antenna 100. As shown in FIG. 7, the ranging processing unit 110 arranges timings at which IRCHs corresponding to TCCHs, which are ranging requests from the terminal apparatus 2, should be transmitted between the periodically arranged BCCHs. In addition, the ranging processing unit 110 arranges a timing at which a PCH for notifying an incoming call to the terminal device 2 (not shown) should be transmitted. Further, the ranging processing unit 110 arranges the timing for receiving the TCCH in association with each of BCCH, IRCH, and PCH.

  As shown in FIG. 7, the ranging processing unit 110 defines two types of TCCHs as TCCHs. Here, for convenience, the two types of TCCH are TCCH [A] and TCCH [B]. TCCH [B] is a TCCH arranged next to PCH among a plurality of TCCHs, and TCCH [A] is a TCCH other than TCCH [B]. Moreover, the ranging process part 110 receives preferentially TCCH from the terminal device 2 which notified the incoming call in PCH in TCCH [B]. The processing performed by the ranging processing unit 110 to enable such preferential reception will be described later.

  In addition, the ranging processing unit 110 generates PCH as an incoming signal based on at least the PSID among the incoming notifications received by the IF unit 106. At this time, the ranging processing unit 110 determines a TCCH pattern based on the radio system information added to the PSID, and uses information for identifying the determined TCCH pattern (hereinafter referred to as “TCCH ID”). Include in PCH. That is, the ranging processing unit 110 generates the PCH while reflecting the wireless method information corresponding to the terminal device 2. The TCCH pattern will be described after describing the TCCH itself. The ranging processing unit 110 broadcasts the PCH via the modulation unit 103, the transmission unit 102, the radio unit 101, and the antenna 100.

  FIG. 10 shows a BCCH message format transmitted from the base station apparatus 1. The BCCH includes a message identifier for discriminating the type of message, and parameters defining the structure of the logical control channel, for example, LCCH structure information representing an interval value, incoming call grouping, a battery saving cycle maximum value, and the like. FIG. 11 shows a message format of PCH transmitted from the base station apparatus 1. The PCH includes a message identifier for determining the type of message and the number of the terminal device that has received the incoming call. The terminal number in the figure corresponds to the aforementioned PSID. The PCH includes a TCCH ID. When the terminal device 2 receives the notification that the PCH has received an incoming call, the terminal device 2 requests initial ranging from the base station device 1 that transmitted the PCH. Returning to FIG.

  When receiving the TCCH from the terminal device 2, the ranging processing unit 110 adjusts the transmission power and transmission timing of the terminal device 2 using a known technique. In addition, the ranging processing unit 110 repeatedly executes a ranging response including the adjustment result, for example, a ranging process for transmitting IRCH a plurality of times. In order to describe such a process in detail, FIGS. 12A to 12B are used here. FIGS. 12A to 12B are time charts of stepwise initial ranging by the base station apparatus 1. FIG. Here, for convenience of explanation, numbers are assigned to the frames in order from the front, and the frames 1 to 9 are indicated as “F1” to “F9”. For the sake of clarity, only the first time slot of each of the uplink and downlink is shown in each frame shown in FIG.

  As described above, the ranging processing unit 110 is configured to receive the TCCH first reception timing and IRCH transmission timing in the frequency band to which the PCH and BCCH are periodically assigned to each base station apparatus 1, that is, SC1 in FIG. Is specified. FIG. 12A shows the operation in SC1. The terminal device 2 specifies the base station device 1 as a connection destination by receiving BCCH (not shown). The terminal device 2 transmits TCCH in F1. In addition, although the terminal device 2 may receive PCH, in that case, the terminal device 2 receives BCCH after receiving PCH.

  A plurality of types of TCCH are defined for each radio system as a waveform pattern. That is, a plurality of types of waveform patterns in the OFDM signal are defined, and a plurality of types of waveform patterns in the SC signal are defined. In addition, the above-described TCCH ID is assigned to each waveform pattern. In the case of an OFDM signal, a waveform pattern is defined by selecting a part of a plurality of subcarriers, and a plurality of types of waveform patterns are defined by changing the selected subcarrier. Therefore, even when the ranging processing unit 110 receives TCCH from a plurality of terminal devices 2 at the same time, the ranging processing unit 110 can recognize the plurality of terminal devices 2 if the waveform patterns between them are different. That is, the collision probability of TCCH is reduced. Also, the waveform pattern of the SC signal is defined so that the correlation with other TCCHs becomes small. In addition, the terminal device 2 (not shown) selects one of a plurality of types of waveform patterns as a TCCH transmission unit. As a result, the TCCH transmitted from the same terminal device 2 may be different for each transmission. Here, the terminal device 2 (not shown) randomly selects one of a plurality of types of waveform patterns.

  In addition to the above processing, the ranging processing unit 110 provides the following rules for the TCCH in order to prioritize incoming calls. The provisions here take into account the following situations: The terminal device 2 transmits TCCH when the terminal device 2 transmits or when the terminal device 2 responds to an incoming call. In the latter, the terminal device 2 transmits the TCCH after recognizing the presence of the incoming call by receiving the PCH. Here, if a collision occurs in the transmitted TCCH, a response period for an incoming call becomes long. The above definition aims to reduce the probability of such TCCH collision and shorten the period of channel assignment processing.

  The ranging processing unit 110 also notifies the waveform pattern to be used on the TCCH when the incoming call is notified on the PCH. This is the TCCH ID shown in FIG. The terminal device 2 notified of the incoming call by the PCH transmits the TCCH while using the designated waveform pattern. The waveform pattern specified by PCH is effective in TCCH [B] in FIG. That is, the ranging processing unit 110 reserves a waveform pattern to be used in TCCH [B] in FIG. 7 when transmitting PCH. On the other hand, the terminal device 2 that has not been notified of the incoming call uses a waveform pattern that is not reserved in TCCH [B]. Under such circumstances, the ranging processing unit 110 preferentially receives the waveform pattern notified by the PCH as the TCCH from the terminal device 2. In TCCH [A], each terminal device 2 uses a plurality of types of waveform patterns while freely selecting them. For example, a conversion rule from PSID to TCCH ID is determined in advance, and each terminal device 2 determines a waveform pattern according to the conversion rule. By reserving the waveform pattern as described above, the TCCH collision probability from the terminal device 2 notified of the incoming call is reduced.

  As described above, the OFDM signal and the SC signal are defined as the format of the signal transmitted from the terminal device 2. Therefore, a plurality of types of waveform patterns are defined so as to be separable between the OFDM signal and the SC signal. There may be a small number of such patterns, for example, there may be only two patterns for OFDM signals and only two patterns for SC signals. On the other hand, if only the OFDM signal or the SC signal is separated, the number of waveform patterns increases compared to the case where both are separated at the same time. For example, there are 4 patterns for OFDM signals and 4 patterns for SC signals.

  Under such circumstances, if the ranging processing unit 110 cannot recognize the radio scheme of the terminal device 2, the ranging processing unit 110 must designate a pattern that can separate the OFDM signal and the SC signal. Furthermore, the ranging processing unit 110 must simultaneously specify the waveform pattern for the OFDM signal and the waveform pattern for the SC signal for one terminal device 2. That is, two TCCH IDs are reserved for one terminal device 2. As a result, the number of waveform patterns that are not reserved decreases.

  In order to solve such a problem, the ranging processing unit 110 uses radio scheme information added to the PSID. The ranging processing unit 110 identifies the wireless method corresponding to the terminal device 2 from the incoming call notification received by the IF unit 106. That is, the ranging processing unit 110 specifies whether the terminal device 2 that is the target of incoming call transmits an OFDM signal or an SC signal based on the wireless method information. Moreover, the ranging process part 110 selects TCCH ID corresponding to the specified radio | wireless system. Further, the ranging processing unit 110 generates a PCCH while associating the selected TCCH ID and terminal number with each terminal device 2. As a result, one TCCH ID for one terminal device 2 is sufficient. Note that the ranging processing unit 110 may include only an incoming call to the terminal apparatus 2 that transmits the OFDM signal or only an incoming call to the terminal apparatus 2 that transmits the SC signal in one PCH. As a result, the number of waveform patterns that are not reserved is further increased.

  FIG. 13 shows an IRCH message format transmitted from the base station apparatus 1. The IRCH instructs to change the message identifier for determining the message type, information for identifying the transmission source that made the initial ranging request, and the identification information of the transmission source to a value different from that of the initial initial ranging request. It includes a transmission source identification information change instruction and information (slot number and subchannel number) specifying a data transfer channel (hereinafter referred to as TCH) to transmit the second TCCH. Here, TCH corresponds to a subchannel other than CS1 in FIG. In the latter part, the communication channel used for communication is also indicated as TCH, but these are used without distinction. The transmission source identification information is such that even when there are simultaneous initial ranging requests from a plurality of terminal devices 2, the base station device 1 can identify the plurality of terminal devices 2 by performing a predetermined calculation on the transmission source identification information. , Is a predefined value. Returning to FIG.

  The ranging processing unit 110 defines the timing at which the TCCH from the terminal device 2 should be received after the second time, by the previous ranging response, for example, the IRCH. In addition, the ranging processing unit 110 indicates a timing and a ranging response in which the TCCH should be received after the second time in a frequency band in which the TCH is adaptively allocated to each base station apparatus 1, for example, SC2 to SC16 in FIG. It defines the timing to be transmitted after the second time. FIG. 12B corresponds to a time chart in the subchannel specified by IRCH, and ranging processing section 110 receives TCCH in F3 and transmits RCH as a ranging response.

  FIG. 14 shows an RCH message format transmitted from the base station apparatus 1. The RCH includes a message identifier for determining the type of message, control information for matching synchronization (timing alignment control and transmission output control), and SCCH transmission / reception timing indicating the start time of the radio resource allocation request. The terminal device 2 requests radio resource allocation after establishing synchronization with the base station device 1 by correcting a time lag by timing alignment control and correcting transmission power by transmission output control. Returning to FIG.

  As shown in FIG. 12B, it is assumed that SCCH in F5 and F6 is designated in RCH. 9 receives the SCCH from the terminal device 2 (not shown) after the ranging process in the ranging processing unit 110 is completed, the allocation unit 112 allocates a communication channel TCH to the terminal device 2. The allocating unit 112 transmits the allocation result included in the SCCH in F5 of FIG. As described above, the allocation unit 112 performs the channel allocation process for the terminal device 2 that has transmitted the IRCH in a frequency band different from the frequency band in which the BCCH, PCH, and the like are arranged in the ranging processing unit 110.

  FIG. 15 shows an SCCH message format transmitted from the base station apparatus 1. The SCCH includes a message identifier for determining a message type, a service flow identifier assigned to the terminal device 2, and information (slot number and subchannel number) specifying the TCH assigned to the terminal device 2. In this way, the initial ranging request is processed step by step, and the LCCH responds until the first initial ranging request response, and the second initial ranging request and radio resource allocation thereafter are responded with the TCH. Accordingly, channel assignment can be performed for a plurality of terminal devices at a time, and the terminal devices can be accurately separated without preparing a large number of transmission source identification information. Returning to FIG. As shown in FIG. 12B, it is assumed that TCHs after F8 are designated in SCCH. The control unit 107 communicates with the terminal device 2 after the allocation of the TCH in the allocation unit 112.

  Returning to FIG. The ranging processing unit 110 recognizes the presence of two or more terminal devices 2 when receiving at least two or more types of waveform patterns at a timing at which TCCH should be received. When the ranging processing unit 110 recognizes the presence of two or more terminal devices 2, the ranging processing unit 110 allocates different frequency bands, that is, different subchannels, to each of the two or more terminal devices 2. The ranging processing unit 110 transmits information on the assigned subchannel included in the IRCH. When the ranging processing unit 110 recognizes the presence of two or more terminal devices 2, the ranging processing unit 110 adjusts transmission power and the like for each.

  Subsequent processing is performed in parallel in another subchannel. That is, the allocating unit 112 performs a process for allocating a channel to each of two or more terminal devices 2 using the subchannel allocated by the ranging processing unit 110. The assigning unit 112 assigns another TCH to each of the two or more terminal devices 2 recognized by the ranging processing unit 110. The control unit 107 communicates with each of two or more terminal devices 2 to which another TCH is assigned.

  FIGS. 16A to 16C are time charts of stepwise initial ranging using a plurality of TCHs by the base station apparatus 1. FIG. In the figure, F1 to F9 represent one frame period. TCCH is an initial ranging request including a message identifier and transmission source identification information. Hereinafter, stepwise initial ranging processing and channel allocation processing will be described with reference to FIGS. The terminal device PS1 stores the transmission source identification information UID “1” in the TCCH, the terminal device PS2 stores the transmission source identification information UID “2”, and transmits it to the base station device CS1 in the upstream period of the frame F1. Request. The base station apparatus CS1 performs a predetermined calculation on the transmission source identification information UID of the superimposed terminal apparatus PS1 and the transmission source identification information UID of the terminal apparatus PS2 to separate them, and communicates with the terminal apparatus PS1 from among the vacant TCHs. Channel 1 is assigned to terminal device PS2 and communication channel 2 is assigned. Then, the slot number and subchannel number of the allocated TCH are stored in the IRCH, and transmitted to the terminal device PS1 and the terminal device PS2 in the downlink period of the frame F1.

  Hereinafter, since the operation of the terminal device PS1 and the terminal device PS2 is the same, the terminal device PS1 will be described as an example. In order to avoid a collision with the logical control channel of another base station apparatus, the terminal apparatus PS1 stands by in the frame F2. The terminal apparatus PS1 stores the transmission source identification information UID “1” in the TCCH, transmits it to the base station apparatus CS1 during the uplink period of the frame F3 using the assigned communication channel 1, and requests the second initial ranging. To do. The base station apparatus CS1 performs a ranging process using the communication channel 1, stores time alignment control, transmission output control, and SCCH transmission / reception timing in the RCH, and transmits them to the terminal apparatus PS1 in the downlink period of the frame F3. . In order to avoid a collision with an initial ranging request for another base station apparatus, the terminal apparatus PS1 stands by in a frame F4. The terminal device PS1 uses the communication channel 1 to request radio resource allocation to the base station device CS1 during the uplink period of the frame F5.

  The base station apparatus CS1 performs FEC (Forward Error Collection) decoding processing on the radio resource allocation request message from the terminal apparatus PS1, and then allocates a free TCH to the terminal apparatus PS1. Since the FEC decoding process takes time, the slot number and subchannel number of the allocated TCH are stored in the SCCH and transmitted to the terminal apparatus PS1 during the downlink period of the frame F6. If the FEC decoding process can be speeded up, the SCCH may be transmitted to the terminal apparatus PS1 during the downlink period of the frame F5. When time is required for the FEC processing of the base station apparatus CS1, the terminal apparatus PS1 may repeat the radio resource allocation request for the base station apparatus CS1 during the uplink period of the frame F5 during the uplink period of the frame F6. This is because, when the base station apparatus CS1 is performing adaptive array processing, the calculation accuracy of the weight vector can be improved. The terminal apparatus PS1 performs FEC decoding processing on the SCCH from the base station apparatus CS1, and establishes synchronization with the base station apparatus CS1 using the frame F8. Thereafter, data is transmitted / received to / from the base station apparatus CS1 using the TCH having established synchronization. Returning to FIG.

  When the ranging processing unit 110 recognizes the presence of two or more terminal devices 2, the ranging processing unit 110 may assign different timings in the same subchannel to each of the two or more terminal devices 2. That is, TCCH and RCH in each of the two or more terminal devices 2 are arranged in different frames. The allocating unit 112 executes a process for allocating a channel to each of the two or more terminal devices 2 at the timing allocated by the ranging processing unit 110. For example, after TCCH, RCH, and SCCH for PS1 (not shown) are arranged, TCCH, RCH, and SCCH for PS2 (not shown) are arranged.

  FIGS. 17A to 17C are time charts of stepwise initial ranging using one TCH by the base station apparatus 1. FIG. Hereinafter, the operations of the stepwise initial ranging process and channel allocation process performed by one TCH will be described with reference to FIGS. 17 (a) to 17 (c). The terminal device PS1 stores the transmission source identification information UID “1” in the TCCH, the terminal device PS2 stores the transmission source identification information UID “1”, and transmits it to the base station device CS1 during the upstream period of the frame F1. Request. The base station apparatus CS1 performs a predetermined operation on the superimposed transmission source identification information UID of the terminal apparatus PS1 and transmission source identification information UID of the terminal apparatus PS2. However, these UIDs are the same and cannot be separated. The base station apparatus CS1 allocates the communication channel 1 to the terminal apparatus PS1 and the terminal apparatus PS2 from the vacant TCHs. The slot number and subchannel number of the allocated TCH are stored in the IRCH, and the change of the transmission source identification information is instructed, and transmitted to the terminal device PS1 and the terminal device PS2 during the downlink period of the frame F1.

  In order to avoid collision with the logical control channel of the other base station apparatus, the terminal apparatus PS1 and the terminal apparatus PS2 stand by in the frame F2. The terminal apparatus PS1 stores the transmission source identification information UID “1” in the TCCH, transmits it to the base station apparatus CS1 during the uplink period of the frame F3 using the assigned communication channel 1, and requests the second initial ranging. To do. On the other hand, the terminal device PS2 that has received the instruction to change the transmission source identification information stores the transmission source identification information UID “2” in the TCCH, and uses the assigned communication channel 1 to transmit the base station device in the uplink period of the frame F3. Send to CS1 and request a second initial ranging.

  The base station apparatus CS1 performs a predetermined operation on the superimposed transmission source identification information UID of the terminal apparatus PS1 and transmission source identification information UID of the terminal apparatus PS2 to separate them. Then, ranging processing is performed using the communication channel 1, time alignment control, transmission output control, and SCCH transmission / reception timing are stored in the RCH, and transmitted to the terminal device PS1 in the downlink period of the frame F3. Here, the SCCH transmission / reception timing is designated as “T5” as the start timing. Similarly, ranging processing is performed using the communication channel 2, time alignment control, transmission output control, and SCCH transmission / reception timing are stored in the RCH, and transmitted to the terminal apparatus PS2 in the downlink period of the frame F3. Here, the SCCH transmission / reception timing is designated as “F7” as the start timing. In order to avoid a collision with an initial ranging request for another base station apparatus, the terminal apparatus PS1 and the terminal apparatus PS2 wait in a frame F4.

  The terminal device PS1 uses the communication channel 1 to request radio resource allocation to the base station device CS1 during the uplink period of the frame F5. The base station apparatus CS1 performs FEC decoding processing on the radio resource allocation request message from the terminal apparatus PS1, and then allocates the communication channel 2 from the vacant TCH to the terminal apparatus PS1. Since the FEC decoding process takes time, the slot number and subchannel number of the allocated TCH are stored in the SCCH and transmitted to the terminal apparatus PS1 during the downlink period of the frame F6. If the FEC decoding process can be speeded up, the SCCH may be transmitted to the terminal apparatus PS1 during the downlink period of the frame F5.

  When time is required for the FEC processing of the base station apparatus CS1, the terminal apparatus PS1 may repeat the radio resource allocation request for the base station apparatus CS1 during the uplink period of the frame F5 during the uplink period of the frame F6. This is because, when the base station apparatus CS1 is performing adaptive array processing, the calculation accuracy of the weight vector can be improved. The terminal apparatus PS1 performs FEC decoding processing on the SCCH from the base station apparatus CS1, and establishes synchronization with the base station apparatus CS1 using the frame F8. Thereafter, data is transmitted / received to / from the base station apparatus CS1 using the TCH having established synchronization.

  On the other hand, the terminal apparatus PS2 uses the communication channel 1 to request radio resource allocation to the base station apparatus CS1 during the uplink period of the frame F7. The base station apparatus CS1 performs an FEC decoding process on the radio resource allocation request message from the terminal apparatus PS2, and then allocates a free TCH to the terminal apparatus PS2. Since time is required for the FEC decoding process, the slot number and subchannel number of the allocated TCH are stored in the SCCH and transmitted to the terminal apparatus PS2 in the downlink period of the frame F8. If the FEC decoding process can be speeded up, the SCCH may be transmitted to the terminal apparatus PS2 during the downlink period of the frame F7.

  When time is required for the FEC processing of the base station apparatus CS1, the terminal apparatus PS2 may repeat the radio resource allocation request for the base station apparatus CS1 during the uplink period of the frame F8 during the uplink period of the frame F8. This is because, when the base station apparatus CS1 is performing adaptive array processing, the calculation accuracy of the weight vector can be improved. The terminal apparatus PS2 performs FEC decoding processing on the SCCH from the base station apparatus CS1, and establishes synchronization with the base station apparatus CS1 with the frame F9. Thereafter, data is transmitted / received to / from the base station apparatus CS1 using the TCH having established synchronization.

  This configuration can be realized in terms of hardware by a CPU, memory, or other LSI of any computer, and in terms of software, it is realized by a program having a communication function loaded in the memory. Describes functional blocks realized by collaboration. Accordingly, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.

  The operation of the communication system 20 having the above configuration will be described. FIG. 18 is a flowchart illustrating a PCH generation procedure in the base station apparatus 1. The IF unit 106 receives an incoming call notification from the control station 52 (not shown) (S200). The ranging processing unit 110 extracts the terminal number of the terminal device 2 to be received and the wireless method information from the incoming notification (S202). If the wireless system is an OFDM signal (Y in S204), the ranging processing unit 110 identifies the TCCH pattern in the OFDM signal (S206). On the other hand, if the wireless system is not an OFDM signal (N in S204), the ranging processing unit 110 identifies the TCCH pattern in the SC signal (S208). The ranging processing unit 110 generates a PCH including a TCCH ID and a terminal number corresponding to the identified pattern (S210). The modulation unit 103, the transmission unit 102, the wireless unit 101, and the antenna 100 transmit PCH (S212).

  FIG. 19 is a sequence diagram showing a TCH synchronization establishment procedure in the communication system 20. FIG. 19 corresponds to the processing following FIG. The base station device 1 stores the terminal number of the terminal device 2, and transmits the PCH simultaneously with other base station devices belonging to the paging area (S100). The base station apparatus 1 transmits BCCH at a predetermined timing (S102). If the terminal device 2 that has received the PCH includes its own terminal number in the PCH, the base station device 1 is identified based on the BCCH, and then the source identification information is stored in the TCCH, and the base station device CS1 To request initial initial ranging (S104). The base station apparatus CS1 separates the transmission source identification information UID of the terminal apparatus 2 from the received TCCH, and allocates the terminal apparatus 2 to an empty TCH. Then, the slot number and subchannel number of the allocated TCH are stored in the IRCH and transmitted to the terminal device 2, and the TCH for the second initial ranging is notified to the terminal device 2 (S106). The terminal device 2 stores the transmission source identification information in the TCCH, transmits it to the base station device 1 using the allocated initial ranging TCH, and requests the second initial ranging (S108).

  The base station apparatus 1 performs a ranging process using the TCH allocated to the terminal apparatus 2, stores time alignment control, transmission output control, and SCCH transmission / reception timing in the RCH, and transmits to the terminal apparatus 2 for transmission. Request correction of output or the like (S110). The terminal device 2 extracts the correction value requested from the base station device 1 from the received RCH, and corrects the transmission output and the like. Next, radio resource allocation is requested to the base station apparatus 1 using the allocated initial ranging TCH (S112). The base station apparatus 1 performs an FEC decoding process on the radio resource allocation request message from the terminal apparatus PS1, and then allocates a free TCH to the terminal apparatus 2. Then, the slot number and subchannel number of the allocated TCH are stored in the SCCH and transmitted to the terminal device 2 (S114). Since the TCH synchronization is established through the steps up to here, the base station apparatus 1 and the terminal apparatus 2 transmit and receive data using the synchronized TCH (S116).

  According to the embodiment of the present invention, the wireless method information is added to the PSID included in the incoming call notification, and the incoming signal is generated while reflecting the wireless method corresponding to the terminal device to be received. Therefore, the incoming signal suitable for the wireless system can be generated. In addition, since only the waveform pattern corresponding to the wireless system can be specified, the number of waveform patterns to be specified for one terminal apparatus can be reduced even when the terminal apparatus supports a plurality of wireless systems. In addition, since the number of waveform patterns is reduced, the amount of instruction information in PCH can be reduced. In addition, since the number of waveform patterns included in the PCH is reduced, the number of waveform patterns that can be used by terminal devices not included in the PCH can be increased. In addition, since the number of waveform patterns that can be used by terminal devices not included in the PCH is increased, the collision probability can be reduced. In addition, since the base station apparatus acquires radio scheme information in advance, it can predict the radio scheme of uplink TCCH. In addition, since the wireless method corresponding to the terminal device is recognized, incoming calls to the terminal device corresponding to one wireless method can be collected into one PCH. In addition, since incoming calls to terminal devices compatible with one wireless system are collected into one PCH, the number of usable waveform patterns can be further increased.

  In addition, when there is an initial initial ranging request from a plurality of terminal devices, a second initial ranging process and channel allocation process are executed after allocating a free TCH for each terminal device, so that a plurality of terminal devices are Channel assignments can be implemented. In addition, when there are initial initial ranging requests from a plurality of terminal devices, the first initial ranging process and channel allocation process are executed after allocating one vacant TCH to the plurality of terminal apparatuses. Channel allocation can be performed on the terminal devices. In addition, since the first TCCH and IRCH are arranged in a frequency band in which periodic signals such as BCCH and PCH are allocated and a plurality of base station apparatuses are time-division multiplexed, Collisions with TCHs of other base station apparatuses can be avoided. In addition, with the above arrangement, the dedicated subchannel for initial ranging can be omitted. In addition, since the dedicated subchannel for initial ranging is omitted, transmission efficiency can be improved.

  In addition, since a plurality of ranging processes are executed in stages, it is possible to cope with TCCH multiplexing processes. In addition, since a plurality of ranging processes are executed in stages, channels can be allocated to a plurality of terminal devices. In addition, since channel assignment processing is scheduled by time division multiplexing, channels can be assigned to a plurality of terminal apparatuses. In addition, since channel allocation processing is scheduled by time division multiplexing, adaptive array transmission can be executed. Further, since the first TCCH and IRCH are arranged between broadcast signals such as BCCH and PCH, the transmission / reception interval of the first TCCH and IRCH can be shortened. In addition, since the transmission / reception interval of the first TCCH or IRCH is shortened, it is possible to shorten the period from when an incoming call is recognized by PCH until communication is made. In addition, since the period from when the incoming call is recognized by the PCH to when it is communicated is shortened, the response to the incoming call can be improved. Moreover, since the transmission / reception interval of the first TCCH or IRCH is shortened, channel allocation can be speeded up.

  Moreover, since TCCH is arrange | positioned so that it may respond | correspond to each of BCCH, IRCH, and PCH, the opportunity of the TCCH transmission by a terminal device can be increased. Moreover, since the opportunity of TCCH transmission by a terminal device is increased, the period of a channel allocation process can be shortened. Further, since the TCCH from the terminal device that has notified the incoming call by PCH is preferentially received, the TCCH collision probability for the incoming call can be reduced. In addition, since the TCCH collision probability for incoming calls is reduced, the response period for incoming calls can be shortened.

  In the above, this invention was demonstrated based on the Example. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to the combination of each component and each processing process, and such modifications are also within the scope of the present invention. .

It is a figure which shows the structure of the paging area in the communication system which concerns on the Example of this invention. It is a figure which shows the structure of the communication system which concerns on the Example of this invention. It is a figure which shows the structure of the TDMA frame in the communication system of FIG. It is a figure which shows the structure of the OFDMA subchannel in the communication system of FIG. It is a figure which shows the structure of the subchannel block in the communication system of FIG. It is a figure which shows the structure of the logical control channel in the communication system of FIG. It is another figure which shows the structure of the logical control channel in the communication system of FIG. It is a figure which shows the structure of PSID received from a control station in the communication system of FIG. It is a figure which shows the structure of the base station apparatus of FIG. FIG. 10 is a diagram illustrating a BCCH message format transmitted from the base station apparatus of FIG. 9. It is a figure which shows the message format of PCH transmitted from the base station apparatus of FIG. 12A and 12B are diagrams showing time charts of stepwise initial ranging by the base station apparatus of FIG. FIG. 10 is a diagram illustrating an IRCH message format transmitted from the base station apparatus of FIG. 9. FIG. 10 is a diagram illustrating an RCH message format transmitted from the base station apparatus of FIG. 9. FIG. 10 is a diagram illustrating an SCCH message format transmitted from the base station apparatus of FIG. 9. 16A to 16C are diagrams illustrating time charts of stepwise initial ranging using a plurality of TCHs by the base station apparatus of FIG. 17A to 17C are diagrams illustrating time charts of stepwise initial ranging using one TCH by the base station apparatus of FIG. 10 is a flowchart showing a PCH generation procedure in the base station apparatus of FIG. 9. FIG. 3 is a sequence diagram showing a TCH synchronization establishment procedure in the communication system of FIG. 2.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Base station apparatus, 2 Terminal apparatus, 20 Communication system, 100 Antenna, 101 Radio | wireless part, 102 Transmission part, 103 Modulation part, 104 Reception part, 105 Demodulation part, 106 IF part, 107 Control part, 110 Ranging process part, 112 Allocation unit.

Claims (5)

A reception unit that receives an incoming call notification including an identification number for identifying a terminal device that is a target of an incoming call from a wired network;
Among the incoming notifications received in the reception unit, based on at least the identification number, a generation unit that generates an incoming signal,
A notification unit that notifies the wireless network of the incoming signal generated in the generation unit,
The identification number received by the reception unit is appended with information on the wireless method corresponding to the terminal device,
The base station device characterized in that the generation unit generates an incoming signal while reflecting information on a radio system corresponding to the terminal device. Between each of the incoming signals periodically notified from the notification unit, a timing for transmitting a ranging response corresponding to the ranging request from the terminal device is arranged, and at least corresponding to the incoming signal or the ranging response, When a timing to receive a ranging request is arranged and a ranging request is received from a terminal device that has received an incoming signal, a ranging processing unit that transmits a ranging response;
In the ranging processing unit, an allocation unit that performs channel allocation processing for a terminal device that has transmitted a ranging response in a frequency band different from the frequency band in which the incoming signal, the ranging request, and the ranging response are arranged;
A communication unit that performs communication with a terminal device after channel allocation in the allocation unit;
The generation unit defines a plurality of types for each radio system as a ranging request as a waveform pattern, and specifies the radio system corresponding to the terminal device from the incoming notification received in the reception unit, and then specifies the specified radio system. A means for selecting any of a plurality of types of waveform patterns defined in response, and a means for generating an incoming signal while associating information and identification numbers with respect to the selected waveform pattern for each terminal device,
The base station apparatus according to claim 1, wherein the ranging processing unit preferentially receives a waveform pattern notified by an incoming signal as a ranging request from a terminal apparatus. In the ranging request to be received by the ranging processing unit, a single carrier signal and a multicarrier signal are defined,
The said generation part prescribes | regulates multiple types of waveform patterns with respect to the ranging request | requirement of a single carrier signal, and prescribes | regulates multiple types of waveform patterns with respect to the ranging request | requirement of a multicarrier signal. The base station apparatus as described. Receiving an incoming call notification including an identification number for identifying a terminal device as an incoming call from a wired network;
A step of generating an incoming signal based on at least the identification number of the received incoming notification;
Notifying the generated incoming signal to the wireless network,
The identification number received in the receiving step is appended with information on the wireless system corresponding to the terminal device,
The communication method characterized in that the generating step generates an incoming signal while reflecting information related to a radio system corresponding to the terminal device. Receiving an incoming call notification including an identification number for identifying a terminal device as an incoming call from a wired network;
A step of generating an incoming signal based on at least the identification number of the received incoming notification;
Notifying the generated incoming signal to the wireless network,
The identification number received in the receiving step is appended with information on the wireless system corresponding to the terminal device,
The generating step is a program for causing a computer to generate an incoming signal while reflecting information related to a radio system corresponding to a terminal device.

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