WO2008072294A1

WO2008072294A1 - Radio terminal apparatus and radio base station apparatus

Info

Publication number: WO2008072294A1
Application number: PCT/JP2006/324589
Authority: WO
Inventors: Hiroshi Nishimura; Takayuki Nakano
Original assignee: Panasonic Corporation
Priority date: 2006-12-08
Filing date: 2006-12-08
Publication date: 2008-06-19

Abstract

In a wireless communication system where a compress mode is applied to each of individual downstream channels and where upstream fast packet communications are performed in upstream packet channels, a radio terminal apparatus and a radio base station apparatus are used which can prevent the throughput from degrading and further can reduce the interference. The radio terminal apparatus (100) comprises a packet transmission control part (104) that controls the upstream packet transmission timing; and a detecting part (109) that generates, based on a scheduled gap interval timing, a scheduled upstream packet transmission timing and based on the scheduled reception timing of reception possibility notifying information received in reply from the upstream packet receiving end (the radio base station apparatus), information for notifying the receiving end that at least one of the scheduled upstream packet transmission timing and scheduled reception timing overlaps with the gap interval. Thus, the radio base station apparatus can modify, for example, the gap interval in response to the notification so that the throughput can be prevented from degrading and the interference can be reduced.

Description

Specification

Radio terminal apparatus and radio base station apparatus

Technical field

TECHNICAL FIELD [0001] The present invention relates to a radio terminal apparatus and a radio base station apparatus in a radio communication system to which a compressed mode is applied.

Background art

[0002] In recent years, system capacity has become tight due to an increase in the number of users in mobile communication, and even in a CDMA system that is usually operated with a single carrier frequency, multiple carrier frequencies are used. There has been proposed a method of performing communication by switching between. In this method, wireless communication terminal equipment (hereinafter simply “communication terminal” t) needs to measure and monitor the reception quality of multiple carriers so that communication is not interrupted when switching carrier frequencies. . For example, a compressed mode described in Non-Patent Document 1, which is a W-CDMA (Wideband Code Division Multiple Access) standard, is known as a technique for measuring and monitoring the reception quality of multiple carriers.

[0003] In the compressed mode, during communication between a base station and a communication terminal, a section in which the base station transmits data locally at a certain rate at a certain period (hereinafter simply referred to as "transmission section"). This is a mode in which communication is performed with a period during which transmission is suspended. A communication terminal in compressed mode receives data at twice the speed when data is present, and when data is not present (where the base station pauses transmission, that is, a gap (GAP) In “interval”), the carrier frequency is switched and used for the current communication, and the reception quality of a carrier different from the carrier (hereinafter sometimes referred to as “different carrier”) is measured.

[0004] When the measurement of the reception quality of different carriers (hereinafter sometimes referred to as "different carrier measurement") is completed, the communication terminal notifies the base station of the measured reception qualities of a plurality of carriers. The base station switches the carrier for data communication after adjusting with the communication terminal in consideration of the carrier reception quality and congestion level of the communication terminal. With this series of operations, even if the communication is continuous like a voice call, it is possible to switch to a different carrier while continuing the communication (that is, without interrupting the communication). [0005] On the other hand, systems that perform highly efficient packet communication in mobile communication in order to efficiently perform data communication are described in, for example, Chapters 4.8 to 4.12 of Non-Patent Document 1 and Chapter 6B of Non-Patent Document 2. HSUPA (High Speed Uplink Packet Access) is generally known.

[0006] In HSUPA, a communication terminal performs data transmission using a transmission channel !, a base station determines success or failure of reception, and transmits success or failure of reception to a communication terminal using a return channel. This is a method of performing packet communication by repeating the flow.

[0007] Hereinafter, HSUPA will be briefly described. The communication terminal transmits data at the transmission rate specified by the base station. The base station transmits a signal indicating success or failure of reception of data transmitted from the communication terminal (hereinafter referred to as “reply data”) to the communication terminal at a predetermined time. The communication terminal performs new data transmission when the reply data from the base station indicates that the data of the communication terminal power has been received (hereinafter referred to as “ACK”). On the other hand, when the reply data from the base station indicates that the data from the communication terminal could not be received (hereinafter referred to as “NACK”), the communication terminal retransmits strong data that the base station could not receive. To do.

[0008] In general, packet communication such as HSUPA is efficient in communication in which user data is generated in bursts, such as Internet access. On the other hand, continuous communication such as voice call is more efficient when using a dedicated continuous communication channel such as DPCH (Dedicated Physical Channel) than packet communication such as HSUPA. The compressed mode is a mode that is applied to continuous data communication such as a voice call, and is not applied to packet communication.

[0009] By the way, in one communication terminal, the downlink dedicated data channel performs communication while switching the carrier frequency using the above-mentioned compression mode, and the uplink dedicated channel performs high-speed packet communication using HSUPA. In this case, the following control is performed.

[0010] That is, a communication terminal that performs communication in the compressed mode as described above normally performs different carrier measurement in the power gap section in which the reception quality of the carrier frequency used for communication is measured. . Also, when different carrier measurement is performed, the return data is demodulated. Don't tell me. In other words, the reply data addressed to the local station is not transmitted on the different carrier or cannot be received by the communication terminal even if it is transmitted, so the reception of the reply data is stopped during the measurement of the different carrier. Furthermore, do not transmit packet data when performing different carrier measurements. That is, even if packet data from a communication terminal is transmitted on a different carrier, it cannot be received by the base station, so transmission of packet data is stopped during measurement of the different carrier.

[0011] As described above, in the communication terminal, when the different carrier measurement and the timing of the packet communication overlap, the different carrier measurement is prioritized over the packet communication, and the packet communication is suspended.

Non-Patent Document 1: 3GPP TS 25.212 V6.7.0 (3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Multiplexing and channel coding (FD D)

Non-Patent Document 2: 3GPP TS 25.214 V6.7.1 (3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Physical layer procedures (FDD) (Re lease 6)

Disclosure of the invention

Problems to be solved by the invention

However, if packet communication is suspended when performing different carrier measurement, the packet transmission opportunity is lost and throughput is reduced. In particular, data transmission is performed using a transmission channel of communication terminal power like HSUPA, and packet communication is performed by transmitting success / failure of data transmission from the base station to the communication terminal using a return channel. On the other hand, not only the transmission opportunity is lost due to the different carrier measurement, but the reception opportunity of the return data may be lost due to the different carrier measurement, which leads to a decrease in throughput. In addition, when the reply data is lost due to the different carrier measurement, the communication terminal determines that the reply data is NACK, so even if the base station can receive the data, the same data is transmitted again. It will be. As a result, unnecessary data is retransmitted as soon as the transmission opportunity is lost, and there is a problem that interference with other communication terminals increases.

An object of the present invention is to apply a compressed mode to a downlink dedicated channel, and Wireless terminal device and wireless base station device used for wireless communication systems in which uplink high-speed packet communication (HSUPA) is performed in a wireless channel, which can prevent a decrease in throughput and reduce interference A wireless terminal device and a wireless base station device are provided.

Means for solving the problem

The wireless terminal device of the present invention is a wireless terminal device used in a wireless communication system in which a compressed mode is applied to a downlink dedicated channel and high-speed packet communication is performed on an uplink packet channel. Gap timing acquisition means for acquiring the gap section scheduled timing in the presto mode, bucket transmission control means for controlling the uplink packet transmission timing, the gap section scheduled timing, the uplink packet transmission scheduled timing, and the uplink packet transmission scheduled timing Based on the scheduled reception timing of the reception possibility notification information to be returned, at least one of the gap interval, the uplink packet transmission scheduled timing, and the scheduled reception timing is also estimated. And that the A configuration that includes a generating unit that generates notification information to notify the signal side.

[0015] A radio base station apparatus of the present invention is a radio base station apparatus used in a radio communication system in which a compressed mode is applied to a downlink dedicated channel and high-speed packet communication is performed on an uplink packet channel. A configuration is provided that includes receiving means for receiving a request for changing the gap position of the transmission power of the upstream packet, and control means for changing the next unchanged scheduled gap section timing in response to the gap position change request.

The invention's effect

[0016] According to the present invention, a radio terminal apparatus and a radio base station used in a radio communication system in which a compressed mode is applied to a downlink dedicated channel and uplink high-speed packet communication (HSUPA) is performed on the uplink packet channel. Thus, it is possible to provide a radio terminal apparatus and a radio base station apparatus that can prevent a decrease in throughput and reduce interference.

Brief Description of Drawings

FIG. 1 is a block diagram showing a configuration of a radio terminal apparatus according to Embodiment 1 of the present invention. FIG. 2 is a diagram for explaining the operation of the wireless terminal device of FIG.

FIG. 3 is a block diagram showing a configuration of a radio terminal apparatus according to Embodiment 2

FIG. 4 is a diagram for explaining the operation of the wireless terminal device of FIG.

FIG. 5 is a block diagram showing a configuration of a wireless terminal apparatus according to Embodiment 3

FIG. 6 is a diagram for explaining the operation of the wireless terminal device of FIG.

FIG. 7 is a block diagram showing a configuration of a radio terminal apparatus according to Embodiment 4

FIG. 8 is a diagram for explaining the operation of the wireless terminal device of FIG.

FIG. 9 is a block diagram showing a configuration of a radio terminal apparatus according to Embodiment 5

FIG. 10 is a diagram for explaining the operation of the wireless terminal device of FIG.

FIG. 11 is a block diagram showing a configuration of a radio base station apparatus according to Embodiment 6

FIG. 12 is a diagram for explaining an operation of the wireless communication system according to the sixth embodiment.

FIG. 13 is a diagram for explaining an operation of the wireless communication system according to the seventh embodiment.

FIG. 14 is a diagram for explaining an operation of the wireless communication system according to the eighth embodiment.

FIG. 15 is a diagram for explaining an operation of the wireless communication system according to the ninth embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that, in the embodiments, the same components are denoted by the same reference numerals, and the description thereof is omitted because it is duplicated.

[0019] (Embodiment 1)

FIG. 1 is a block diagram showing a configuration of radio terminal apparatus 100 according to Embodiment 1 of the present invention. In the present embodiment, radio terminal apparatus 100 performs data transmission using a transmission channel, a radio base station apparatus (not shown) determines success or failure of reception, and the radio base station apparatus determines whether or not the reception is successful. It is assumed that a packet communication system that uses a reply channel for transmission, that is, an automatic retransmission control (ARQ) is applied, is!

As shown in FIG. 1, radio terminal apparatus 100 includes antenna 101, receiving section 102, reply data demodulating section 103, packet transmission control section 104, packet modulating section 105, transmitting section 106, A carrier switching control unit 107, a reception quality measurement unit 108, and a detection unit 109 are included. [0021] A signal transmitted from the radio base station apparatus and received via the antenna 101 is received by the receiving unit 10.

In step 2, predetermined radio reception processing such as down-conversion is performed.

[0022] Reply data demodulating section 103 performs predetermined demodulation processing such as despreading on the reception signal subjected to radio reception processing by receiving section 102, and sends reply data obtained by the demodulation processing to packet transmission control section 104. Output.

If the return data from reply data demodulating section 103 is ACK, packet transmission control section 104 sends a new packet transmission instruction signal instructing transmission of new packet data to detection section 109. On the other hand, when the reply data from reply data demodulating section 103 is NACK, packet transmission control section 104 detects a retransmission instruction signal that instructs retransmission of packet data that cannot be received by the radio base station apparatus. Send to part 109. The packet transmission control unit 104 also transmits transmission timing information related to transmission or retransmission together with the new packet transmission instruction signal and the retransmission instruction signal.

Detection unit 109 outputs the new packet transmission instruction signal and retransmission instruction signal input from packet transmission control unit 104 and the transmission timing information to packet modulation unit 105.

[0025] Detection section 109 is also based on transmission timing information input from packet transmission control section 104 and compressed mode timing information (information on transmission sections and gap sections) input from carrier switching control section 107. Whether the reception timing of the response data of the radio base station apparatus for the packet related to the current transmission (current transmission packet) overlaps with the gap interval, and the transmission timing of the packet next to the current transmission packet is the gap interval Judge whether or not. As a result of this determination, if the transmission timing of the next packet and the timing of the gap interval overlap, the detection unit 109 outputs control information (notification information) indicating that fact to the packet modulation unit 105. Also, if the reception timing of the reply data and the timing of the gap interval overlap, control information (notification information) indicating that is output to the packet modulation unit 105.

[0026] Packet modulation section 105 performs predetermined modulation processing such as spreading processing on the packet data in accordance with the new packet transmission instruction signal and retransmission instruction signal and transmission timing information from detection section 109, and is modulated. The signal is output to transmitting section 106. Also packet modulation The unit 105 performs similar modulation processing on the control information received from the detection unit 109. When receiving the control information from the detection unit 109, the packet modulation unit 105 outputs a multiplexed signal obtained by multiplexing the packet data and the control information after the modulation processing to the transmission unit 106.

[0027] Transmitting section 106 performs predetermined radio transmission processing such as up-conversion on the signal input from packet modulation section 105! \ Sends the radio transmission processed signal to base station via antenna 101 To do.

[0028] Carrier switching control section 107 performs reception of different carriers at the timing of the gap interval, receiving section 102, reply data demodulating section 103, packet transmission control section 104, transmitting section 106, and reception quality measuring section 108. Notify Further, the carrier switching control unit 107 outputs the timing of the gear section to the detection unit 109.

[0029] Carrier switching control section 107 controls switching between the carrier frequency received by receiving section 102 and the carrier frequency transmitted by transmitting section 106 at the timings of the transmission interval and the gap section. The carrier switching control unit 107 performs control to set the reception quality target carrier frequency of the reception quality measurement unit 108 to the carrier frequency used at the time of the transmission interval, and in the non-transmission interval (gap interval). Control to set a different carrier frequency different from the carrier frequency in the transmission section. That is, the reception quality measurement unit 108 normally measures the reception quality of the carrier frequency used by the radio terminal apparatus 100 for communication. In accordance with the control of the carrier switching control unit 107, the reception quality measurement unit 108 measures different carriers in the gap interval. Will do. Reception quality measuring section 108 measures reception quality based on a common channel (pilot) transmitted by a carrier targeted for reception quality.

[0030] Further, the carrier switching control unit 107 controls the reply data demodulating unit 103 so as not to demodulate the reply data when performing different carrier measurement, that is, in the gap section. That is, in different carriers, the reply data addressed to the own station is not transmitted, or the wireless terminal device 100 cannot receive it even if it is transmitted. Therefore, reply data demodulation section 103 stops receiving reply data during the measurement of different carriers.

Also, the carrier switching control unit 107 performs packet data when performing different carrier measurement. The packet transmission control unit 104 is instructed not to perform this modulation. In other words, even if packet data is transmitted from radio terminal apparatus 100 in a different carrier, it cannot be received by the radio base station apparatus. Therefore, packet transmission control section 104 transmits packet data during measurement of the different carrier. To stop. The compressed mode is a mode that is applied to continuous data communication such as voice calls, and is not applied to packet communication.

Next, the operation of radio terminal apparatus 100 having the above configuration will be described with reference to FIG. 1 and FIG. FIG. 2 is a diagram for explaining the operation of the wireless terminal device 100. In the figure, the reception status of radio terminal apparatus 100 in the downlink dedicated channel (for data) is shown at the top. The middle section shows the reception status of the wireless terminal device 100 in the downlink dedicated channel (for reply). The lower part shows the transmission status of radio terminal apparatus 100 in the uplink dedicated channel (for uplink high-speed packet communication). In the bottom row, changes in the carrier frequency (reception frequency) set by the switching control of the carrier switching control unit 107 are shown.

In FIG. 2, packet D1 is first transmitted from radio terminal apparatus 100 to the radio base station apparatus via an uplink dedicated channel for high-speed packet communication. Packet transmission control is performed by the packet transmission control unit 104. The radio terminal device 100 receives the reply data R1 transmitted as the reply data for the packet D1 by the downlink individual channel. The transmission time of packet D1 and the time it takes to receive reply data R1 are substantially constant and are predetermined by the system.

[0034] When the reply data R1 is ACK, the next packet D2 is transmitted in the same manner as the packet D1. Note that the time interval from when the reply data is received until the next packet is transmitted is substantially constant and is predetermined by the system.

[0035] When packet D2 is transmitted (timing T1 in FIG. 2), detection unit 109 transmits transmission timing information from packet transmission control unit 104 and compression mode timing from carrier switching control unit 107. Receiving information. Then, the detection unit 109 is based on both information and the time interval from the transmission of the packet until the return data for the packet is received and the time interval from the reception of the return data to the transmission of the next packet. From the radio base station apparatus for the packet related to the current transmission (current transmission packet) It is determined whether the return timing of the reply data overlaps with the gap interval and whether the transmission timing of the packet next to the current transmission packet overlaps with the gap interval.

In FIG. 2, since the reception timing of the reply data from the radio base station apparatus for packet D2 overlaps with the gap interval, detection section 109 detects the radio base station apparatus power for the packet related to the current transmission (current transmission packet). Control information (notification information) indicating that the reception timing of the reply data overlaps the gap interval is sent to the packet modulation section 105. This control information (notification information) is modulated by packet modulation section 105, multiplexed with packet D2, and transmitted to the radio base station apparatus.

[0037] Even if reply data R2 is received in the gap section, radio terminal apparatus 100 is not in a state of demodulating. Therefore, even if the reply data R2 is ACK, the radio terminal device 100 determines that the radio base station device has not received the packet D2, and the packet transmission control unit 104 controls the packet D2 to be received. Resend (timing T2 in Figure 2).

[0038] As in the case of timing T1, the detection unit 109 transmits both the transmission timing information and the compressed mode timing information, the time interval from the transmission of the packet to the reception of the response data for the packet, and the response. Based on the time interval from when the data is received until the next packet is transmitted, the reception timing of the response data of the wireless base station device for the packet related to the current transmission (current transmission packet) is the gap interval. It is determined whether they overlap, and whether the transmission timing of the packet next to the current transmission packet overlaps the gap interval.

In FIG. 2, since the next transmission timing of packet D2 that is the current transmission packet (timing for transmitting D3) overlaps the gap interval, detection unit 109 detects that the next transmission timing of the current transmission packet is a gap. Control information (notification information) indicating that it overlaps the section is sent to the packet modulation unit 105. This control information (notification information) is modulated by packet modulation section 105, multiplexed with packet D2, and transmitted to the radio base station apparatus.

[0040] As described above, the reception timing of the return data from the radio base station apparatus for the packet related to the current transmission (current transmission packet) overlaps with the gap section, and the transmission timing of the packet next to the current transmission packet Can be notified to the radio base station apparatus that it overlaps the gap section, so that the radio base station apparatus can perform the following Embodiments 6 to As shown in Form 8, it is possible to perform processing such as changing the gap section or stopping the compressed mode. When the radio base station apparatus performs the processing as described above, it is possible to prevent a decrease in throughput and to avoid performing unnecessary packet transmission, thereby reducing interference.

[0041] Thus, according to the present embodiment, the wireless terminal device 100 used in the wireless communication system in which the compressed mode is applied to the downlink dedicated channel and high-speed packet communication is performed on the uplink packet channel is provided in the wireless terminal device 100. Carrier switching control unit 107 that acquires the compressed gap interval scheduled timing, packet transmission control unit 104 that controls the uplink packet transmission timing, the gap segment scheduled timing, the uplink packet transmission scheduled timing, and Upstream packet transmission scheduled timing power Based on the estimated reception timing of the reception availability notification information returned from the upstream packet receiving side, which is estimated, the gap section, the uplink packet transmission scheduled timing, and the reception That at least one of the scheduled times overlaps Serial and detection unit 109 that generates notification information to notify the receiving side, and the provided.

[0042] By so doing, it is possible to notify the radio base station apparatus on the receiving side of the uplink packet that the gap interval and the transmission / reception timing overlap, so that the radio base station apparatus can respond to the notification according to the notification. Processing such as changing the section or stopping the compressed mode can be executed. When the radio base station apparatus performs the above processing, it is possible to prevent a decrease in throughput and to avoid performing unnecessary packet transmission, so that interference can be reduced.

[Embodiment 2]

Embodiment 2 is an embodiment in the case of transmitting a gap (GAP) position change request as control information (notification information) from a wireless terminal device to a wireless base station device.

As shown in FIG. 3, radio terminal apparatus 200 according to Embodiment 2 has detection section 201.

[0045] Based on the transmission timing information input from the packet transmission control unit 104 and the compression mode timing information input from the carrier switching control unit 107, the detection unit 201 detects a packet ( The response data reception timing from the wireless base station device for the current transmission packet) overlaps with the gap interval, and the current transmission packet It is determined whether the transmission timing of the packet overlaps with the gap interval. As a result of this determination, the detection unit 201 determines that the gap (GAP) is used when the transmission timing of the next packet overlaps with the timing of the gap interval, or when the reception timing of the return data overlaps with the timing of the gap interval. ) A position change request is generated, and this gap (GAP) position change request is output to the packet modulation unit 105. The gap (GAP) position change request is modulated by the packet modulation unit 105, multiplexed with the packet, and transmitted to the radio base station apparatus.

Next, the operation of radio terminal apparatus 200 having the above configuration will be described with reference to FIG. 3 and FIG. FIG. 4 is a diagram for explaining the operation of the wireless terminal device 200. In the figure, the reception status of radio terminal apparatus 200 in the downlink dedicated channel (for data) is shown at the top. The middle section shows the reception status of radio terminal apparatus 200 in the downlink dedicated channel (for reply). The lower part shows the transmission status of radio terminal apparatus 200 in the uplink dedicated channel (for uplink high-speed packet communication). In the bottom row, changes in the carrier frequency set by the switching control of the carrier switching control unit 107 are shown.

In FIG. 4, first, packet D1 is transmitted from radio terminal apparatus 200 to the radio base station apparatus via an uplink dedicated channel for high-speed packet communication. Packet transmission control is performed by the packet transmission control unit 104. The wireless terminal device 200 receives the reply data R1 transmitted by the wireless base station device as reply data to the packet D1 via the downlink individual channel.

[0048] When the reply data R1 is ACK, the next packet D2 is transmitted in the same manner as the packet D1.

[0049] When the packet D2 is transmitted (timing T1 in FIG. 4), the detecting unit 201 transmits the transmission timing information from the packet transmission control unit 104 and the timing of the compression mode from the carrier switching control unit 107. Receiving information. Then, the detection unit 201 is based on both information and the time interval from the transmission of the packet until the return data for the packet is received and the time interval from the reception of the return data to the transmission of the next packet. The response timing of the return data from the radio base station apparatus for the packet related to the current transmission (current transmission packet) overlaps with the gap interval and the current transmission packet It is determined whether the transmission timing of the next packet overlaps the gap interval.

In FIG. 4, since the reception timing of the reply data from the radio base station apparatus for packet D 2 overlaps with the gap section, detection section 201 sends a gap (GAP) position change request to bucket modulation section 105. This gap (GAP) position change request is modulated by the packet modulator 105, multiplexed with the packet D2, and transmitted to the radio base station apparatus.

[0051] Even if reply data R2 is received in the gap section, radio terminal apparatus 200 is not in a state of demodulating. Therefore, even if the reply data R2 is ACK, the wireless terminal device 200 determines that the packet cannot be received by the wireless base station device, and the packet transmission control unit 104 controls the packet D2 to be received. Resend (timing T2 in Fig. 4).

[0052] As in the case of timing T1, the detection unit 201 includes both the transmission timing information and the compressed mode timing information, the time interval from the transmission of the packet to the reception of the reply data for the packet, and the response. Based on the time interval from when the data is received until the next packet is transmitted, the reception timing of the response data of the wireless base station device for the packet related to the current transmission (current transmission packet) is the gap interval. It is determined whether they overlap and whether the next transmission timing of the current transmission packet overlaps the gap interval.

In FIG. 4, since the next transmission timing (timing for transmitting D3) of packet D2, which is the current transmission packet, overlaps with the gap interval, detection unit 201 performs packet modulation on the gap (GAP) position change request. Send to part 105. This gap (GAP) position change request is modulated by the packet modulation section 105, multiplexed with the packet D2, and transmitted to the radio base station apparatus.

[0054] As described above, when the reception timing of the return data from the radio base station apparatus for the packet related to the current transmission (current transmission packet) overlaps the gap section, and transmission of the packet next to the current transmission packet When the timing corresponds to at least one of the cases where the timing overlaps the gap section, the radio base station apparatus can acquire a gap (GAP) position change request transmitted from the radio terminal apparatus 200. Therefore, the radio base station apparatus can perform the gap section change process as described in Embodiment 6 and Embodiment 8 described later. The radio base station device performs the gap section change process. In addition, since the overlap can be eliminated in advance, it is possible to prevent a decrease in throughput and to avoid performing unnecessary packet transmission, thereby reducing interference.

[0055] Thus, according to the present embodiment, detection section 201 has the scheduled transmission timing of the next transmission packet following the current transmission packet related to the next transmission and the scheduled reception timing of the reception availability notification information for the next transmission packet. Notification information including a gap position change request is generated when at least one of the above and the next gap section scheduled timing overlap

[0056] By doing so, the radio base station apparatus on the receiving side of the transmission packet can eliminate the overlap in advance by changing the gap section in response to the gap position change request, so that the throughput can be reduced. The reduction can be prevented, and unnecessary packet transmission can be avoided, so that interference can be reduced.

[Embodiment 3]

Embodiment 3 is an embodiment in the case of transmitting a carrier (frequency) switching cancellation notification as control information (notification information) from a wireless terminal device to a wireless base station device. When transmitting this frequency cancellation notification, there is no change in the processing in the radio base station apparatus, but the radio terminal apparatus does not perform the different carrier measurement normally performed in the gap section, and the carrier used in the compressed mode is not used. The state in which the signal transmitted from the radio base station apparatus can be received and modulated and the signal can be transmitted is maintained.

As shown in FIG. 5, radio terminal apparatus 300 according to Embodiment 3 has detection section 301 and carrier switching control section 302.

[0059] Based on the transmission timing information input from the packet transmission control unit 104 and the compressed mode timing information input from the carrier switching control unit 302, the detection unit 301 detects the packet ( It is determined whether the reception timing of the return data from the radio base station apparatus for the current transmission packet) overlaps with the gap interval, and whether the transmission timing of the packet next to the current transmission packet overlaps with the gap interval. As a result of this determination, if the next transmission timing and the gap interval timing overlap, or if the return data reception timing and the gap interval timing overlap, the detection unit 301 issues a carrier switching cancel notification. Generate and packet this carrier switching cancel notification Output to modulation section 105 and carrier switching control section 302.

[0060] Carrier switching control section 302 has at least one of when the next packet transmission timing and the gap section timing overlap at detection section 301 and when the return data reception timing and the gap section timing overlap. When it is determined that either of them is satisfied, the frequency change control processing of the reception unit 102 and the transmission unit 106 that is normally performed in the gap section and the demodulation stop control processing for the reply data demodulation unit 103 are not performed. That is, when the carrier switching cancel notification is output from the detection unit 301, the carrier switching control unit 302 indicates that the different carrier measurement is not performed at the timing of the next compressed mode. This is notified to the reply data demodulation unit 103, the packet transmission control unit 104, the transmission unit 106, and the reception quality measurement unit 108.

Next, the operation of radio terminal apparatus 300 having the above configuration will be described with reference to FIG. 5 and FIG. FIG. 6 is a diagram for explaining the operation of the wireless terminal device 300. In the figure, the reception status of radio terminal apparatus 300 in the downlink dedicated channel (for data) is shown at the top. The middle section shows the reception status of the wireless terminal device 300 in the downlink dedicated channel (for reply). The lower part shows the transmission status of radio terminal apparatus 300 in the uplink dedicated channel (for uplink high-speed packet communication). In the bottom row, changes in the carrier frequency set by the switching control of the carrier switching control unit 302 are shown.

[0062] When packet D2 is transmitted (timing T1 in Fig. 6), detection unit 301 transmits transmission timing information from packet transmission control unit 104 and compression mode timing from carrier switching control unit 302. Receiving information. Then, the detection unit 301 is based on both information and the time interval from the transmission of the packet until the return data for the packet is received and the time interval from the reception of the return data to the transmission of the next packet. And determining whether the reception timing of the reply data from the radio base station apparatus for the packet related to the current transmission (current transmission packet) overlaps with the gap interval and whether the next transmission timing of the current transmission packet overlaps with the gap interval. .

[0063] In FIG. 6, since the reception timing of the reply data from the radio base station apparatus for packet D2 overlaps with the gap section, the detection unit 301 displays a packet for canceling carrier switching. The data is sent to the dot modulation unit 105 and the carrier switching control unit 302. This carrier switching cancellation notification is modulated by the packet modulation section 105, multiplexed with the packet D2, and transmitted to the radio base station apparatus.

[0064] Carrier switching control section 302 has at least one of when the next packet transmission timing and the gap section timing overlap at detection section 301 and when the return data reception timing and the gap section timing overlap. When the carrier switching cancellation notification is received from the detecting unit 301 by determining that it corresponds to either of these, the frequency change control processing of the receiving unit 102 and the transmitting unit 106 normally performed in the gap section, The demodulation stop control process for the reply data demodulation unit 103 is not performed. Therefore, even the reply data R2 received in the gap section can be received and modulated.

When the reply data R2 received and modulated in the gap section is ACK, the packet D3 is transmitted at the next transmission timing under the control of the packet transmission control unit 104 (timing T2 in FIG. 6).

[0066] As in the case of timing T1, detection unit 301 receives both information of transmission timing information and compression mode timing information, and the time interval and response from reception of a packet to reception of reply data for the packet. Based on the time interval from when the data is received until the next packet is transmitted, the reception timing of the response data of the wireless base station device for the packet related to the current transmission (current transmission packet) is the gap interval. It is determined whether they overlap and whether the next transmission timing of the current transmission packet overlaps the gap interval.

[0067] In FIG. 6, since the next transmission timing of packet D3, which is the current transmission packet (timing for transmitting D4) overlaps with the gap section, detection unit 301 transmits carrier switching cancellation notification to packet modulation unit 105 and The data is sent to the carrier switching control unit 302.

[0068] Carrier switching control section 302 has at least one of when the detection timing of the next packet overlaps with the timing of the gear section and when the timing of reception of the return data and the timing of the gap section overlap. When the carrier switching cancellation notification is received from the detection unit 301 by determining that it corresponds to either of these, the frequency change control processing of the reception unit 102 and the transmission unit 106 that is normally performed during the gap section, In addition, the demodulation stop control process for the reply data demodulation unit 103 is not performed. Therefore, it is possible to transmit even packet D4 whose transmission timing overlaps the gap interval.

[0069] As described above, when the reception timing of the return data from the radio base station apparatus for the packet related to the current transmission (current transmission packet) overlaps with the gap section, and transmission of the packet next to the current transmission packet When the timing corresponds to at least one of the cases where the timing overlaps with the gap section, the radio base station apparatus can acquire the carrier switching cancellation notification transmitted from the radio terminal apparatus 300. Further, carrier switching control section 302 has at least one of a case where detection section 301 overlaps the next transmission timing and the gap section timing and a case where the reception timing of reply data and the gap section timing overlap. When the carrier switching cancellation notification is received from the detecting unit 301 by determining that it corresponds to the frequency change control processing of the receiving unit 102 and the transmitting unit 106 that is normally performed in the gap section, and the reply data demodulating unit 10 3 The demodulation stop control process for is not performed. Therefore, it is possible to receive and demodulate the reply data that overlaps the gap section, and it is possible to transmit even the packet whose transmission timing overlaps the gap section. As a result, interruption of packet transmission can be avoided, so that a drop in throughput can be prevented, and unnecessary packet transmission can be avoided, so that unnecessary packet transmission can be avoided and interference can be reduced.

As described above, according to the present embodiment, detection section 301 deviates at least between the scheduled transmission timing of the current transmission packet related to the next transmission and the scheduled reception timing of reception availability notification information for the current transmission packet. On the other hand, when the next gap section scheduled timing overlaps, notification information including a transmission / reception carrier switching cancellation notification is generated, and the carrier switching control unit 302 responds to the switching cancellation notification with the next switching cancellation notification. Stop transmission / reception carrier switching at the gap section scheduled timing.

[0071] By doing this, wireless terminal apparatus 300 stops transmission / reception carrier switching in the gap section, so that packets can be transmitted and received in the gap section and return data can be received. As a result, interruption of packet transmission can be avoided, so that a reduction in throughput can be prevented, and unnecessary packet transmission can be avoided, so that unnecessary packet transmission can be avoided and interference can be reduced. [Embodiment 4]

Embodiment 4 is an embodiment in which transmission execution and transmission suspension of a gap position change request are controlled according to the line quality level of the downlink dedicated channel. If the channel quality is lower than the predetermined level, transmission of the gap position change request is stopped.

As shown in FIG. 7, radio terminal apparatus 400 according to Embodiment 4 includes a line quality measurement unit 401 and a detection unit 402.

Channel quality measuring section 401 calculates a channel quality measurement value from the received signal of receiving section 102 and outputs the calculated value to detecting section 402. Channel quality measurement section 401 calculates a channel quality measurement value based on the received signal transmitted to the own device in the downlink dedicated channel. Here, the channel quality measurement value is an index indicating whether or not the received signal can be received accurately. For example, the received power per code and the SZN ratio can be used.

Detection unit 402 is similar to detection unit 201 of Embodiment 2, and includes transmission timing information input from packet transmission control unit 104 and compression mode timing information input from carrier switching control unit 107. Based on the above, whether the reception timing of the response data of the radio base station apparatus for the packet related to the current transmission (current transmission packet) overlaps with the gap interval, and transmission of the packet next to the current transmission packet Determine if the timing overlaps the gap interval.

[0076] Unlike the detection unit 201 of the second embodiment, the detection unit 402 is the case where the next transmission timing and the gap interval timing overlap as a result of the determination, or the reception timing of the return data and the gap interval timing If the line quality measurement value is less than the predetermined level, transmission of the gap position change request is stopped and the gap position change request is requested only when the line quality measurement value is equal to or higher than the predetermined level. Execute sending.

Next, the operation of radio terminal apparatus 400 having the above configuration will be described with reference to FIG. 7 and FIG. FIG. 8 is a diagram for explaining the operation of the wireless terminal device 400. In the figure, the bottom line shows the fluctuation state of the line quality measurement value.

[0078] At timing T1 in FIG. 8, as in FIG. 4, the detection unit 402 determines that the reception timing of the response data of the radio base station apparatus power for the bucket (current transmission packet) related to the current transmission is the gap interval. In addition, the line quality measurement value is greater than or equal to a predetermined threshold value. Therefore, a gap position change request is transmitted.

On the other hand, at timing T2 in FIG. 8, unlike FIG. 4, the detection unit 402 determines that the transmission timing of the packet next to the current transmission packet overlaps the gap interval, but the channel quality measurement value has a predetermined threshold. Because it is less than the value, transmission of the gap position change request is canceled.

It should be noted that, as a reference for transmission execution and transmission stop of the gap position change request, the error rate of the received data may be used, or the level of the reception quality measurement value in the reception quality measurement unit 108 may be used. . In short, it should be possible to control the transmission execution and suspension of the gap position change request according to the communication quality level of the wireless terminal device.

Here, when the communication quality is less than a predetermined level, there is a high possibility that the retransmission of the packet is likely to be performed even if the gap position is changed. . Therefore, when the reception timing of the reply data from the radio base station apparatus for the packet related to the current transmission (current transmission packet) overlaps with the gap section, and when the next transmission timing of the current transmission packet overlaps with the gap section By transmitting the gap position change request only when it corresponds to at least one of them and the communication quality is equal to or higher than a predetermined level, unnecessary transmission of the gap position change request can be avoided. .

[0082] In the above description, when the channel quality measurement value is equal to or greater than the preset value! /, And the next data transmission timing overlaps with the gap interval timing, or the channel quality measurement value is preset. A case has been described in which a gap position change request is output to the packet modulation unit 105 when the threshold value is exceeded and the reception timing of the return data for data transmission overlaps with the timing of the gap interval. However, the operation of outputting a gap position change request to the packet modulator 105 only when the line quality measurement value is equal to or greater than a preset threshold value and the next data transmission timing overlaps with the gap interval timing. In other words, only when the channel quality measurement value is equal to or higher than a preset threshold value and the reception timing of the return data for data transmission overlaps the gap interval timing, the gap position change request is issued. It is also possible to output to

[0083] As described above, the reception timing of the response data of the wireless base station apparatus with respect to the packet related to the current transmission (current transmission packet) overlaps with the gap section. Only when the next transmission timing of the current transmission packet corresponds to at least one of the cases where it overlaps with the gap section, and the communication quality is equal to or higher than a predetermined level. By performing transmission, useless transmission of gap position change requests can be avoided. As a result, interference can be reduced.

Thus, according to the present embodiment, detection section 402 stops transmission of notification information including a gap position change request when measured communication quality is less than a predetermined level.

In this way, if the measured communication quality is less than the predetermined level, it is presumed that data cannot be transmitted / received correctly even if the gap section force is changed to the transmission section. Transmission can be avoided. As a result, interference can be reduced.

[0086] (Embodiment 5)

Embodiment 5 is an embodiment in which transmission execution and transmission stop of a carrier switching cancel notification are controlled in accordance with the line quality level of a downlink dedicated channel. If the channel quality is lower than the predetermined level, transmission of the carrier switching cancellation notification is stopped.

As shown in FIG. 9, radio terminal apparatus 500 according to Embodiment 5 has detection section 501.

Detection unit 501 is similar to detection unit 301 in the third embodiment, and includes transmission timing information input from packet transmission control unit 104 and compression mode timing information input from carrier switching control unit 302. Based on the above, whether the reception timing of the response data of the radio base station apparatus for the packet related to the current transmission (current transmission packet) overlaps with the gap interval, and transmission of the packet next to the current transmission packet Determine if the timing overlaps the gap interval.

Detection unit 501 differs from detection unit 301 of Embodiment 3 in the case where the result of determination is that the next transmission timing overlaps with the timing of the gap interval, or the reception timing of reply data and the timing of the gap interval Even if the channel quality measurement value is less than the predetermined level, the transmission of the carrier switching cancellation notification is stopped and the carrier switching cancellation notification is sent only when the channel quality measurement value is equal to or higher than the predetermined level. Execute transmission. Next, the operation of radio terminal apparatus 500 having the above configuration will be described with reference to FIG. 9 and FIG. FIG. 10 is a diagram for explaining the operation of the wireless terminal device 500. In the figure, the bottom line shows the fluctuation status of the line quality measurement value.

[0091] At timing T1 in FIG. 10, in the same way as in FIG. 6, the detecting unit 501 determines that the reception timing of the return data from the radio base station apparatus for the packet (current transmission packet) related to the current transmission is the gap interval. In addition, since the channel quality measurement value is equal to or greater than a predetermined threshold value, a carrier switching cancel notification is transmitted.

On the other hand, at timing T2 in FIG. 10, unlike FIG. 6, the detection unit 501 determines that the transmission timing of the packet next to the current transmission packet overlaps the gap interval, but the line quality measurement value is not predetermined. Since it is less than the threshold value, transmission of the carrier switching cancellation notification is stopped.

It should be noted that as a reference for transmission execution and transmission suspension of the carrier switching cancellation notification, the error rate of the received data may be used, or the level of the reception quality measurement value in the reception quality measurement unit 108 may be used. Good. In short, it is only necessary to be able to control the transmission execution and transmission suspension of the carrier switching cancellation notification according to the communication quality level of the wireless terminal device.

[0094] Here, when the communication quality is less than the predetermined level, even if the carrier that is currently in communication can be received and demodulated can be received and demodulated without performing different carrier measurement. There is a high possibility that it will be impossible to receive correctly. Therefore, when the reception timing of the response data of the radio base station device for the packet related to the current transmission (current transmission packet) overlaps with the gap section, and when the next transmission timing of the current transmission packet overlaps with the gap section By transmitting the carrier switching cancel notification only when the situation falls into at least one of the above and the communication quality is equal to or higher than a predetermined level, unnecessary transmission of the carrier switching cancel notification is avoided. be able to.

In the above description, when the channel quality measurement value is equal to or greater than the preset value! /, And the next data transmission timing overlaps with the gap interval timing, or the channel quality measurement value is preset. Carrier switching cancellation notification when the threshold value is exceeded and the return timing of the return data for data transmission overlaps with the gap interval timing Has been described for outputting to the packet modulation section 105. However, an operation of outputting a carrier switching cancellation notification to the packet modulation unit 105 only when the line quality measurement value is equal to or higher than a preset threshold value and the next data transmission timing overlaps with the timing of the gap interval, or Operation to output a carrier switching cancellation notification to the packet modulator 105 only when the channel quality measurement value is equal to or greater than a preset threshold value and the reception timing of the return data for data transmission overlaps the timing of the gap section But it ’s okay.

[0096] As described above, when the wireless terminal device 500 receives the transmission timing of the response data of the wireless base station device for the packet related to the current transmission (current transmission packet) overlaps the gap interval, and the current transmission The carrier switching cancellation notification is transmitted only when the next transmission timing of the packet corresponds to at least one of the cases when the gap interval overlaps and the communication quality is equal to or higher than a predetermined level. It is possible to avoid unnecessary transmission of the switch cancel notification. As a result, interference can be reduced.

As described above, according to the present embodiment, when measurement communication quality is less than a predetermined level, radio terminal apparatus 500 stops transmission of notification information including the switching cancellation notification. Execute switching between transmission and reception carriers.

By so doing, useless transmission of the carrier switching cancellation notification can be avoided. As a result, interference can be reduced.

[0099] (Embodiment 6)

Embodiment 6 relates to a radio communication system including radio terminal apparatus 200 of Embodiment 2 and a radio base station apparatus that performs processing according to a gap position change request transmitted from radio terminal apparatus 200 .

[0100] As shown in FIG. 11, radio base station apparatus 600 according to the present embodiment includes receiving section 601 and demodulating section.

602, a decoding unit 603, a communication control unit 604, a transmission data forming unit 605, a modulation unit 606, and a transmission unit 607.

[0101] The received signal received via the antenna is subjected to predetermined radio reception processing in receiving section 601 and demodulated in demodulating section 602. The demodulated received signal thus obtained is This is input to the decoding unit 603.

[0102] Decoding section 603 decodes the demodulated signal and detects an error in the data thus obtained.

This detection result is output to the communication control unit 604. The decoding unit 603 outputs the control information (notification information) obtained from the decoding to the communication control unit 604.

Communication control unit 604 generates reply data according to the detection result in decoding unit 603. The communication control unit 604 generates an ACK when the detection result of the decoding unit 603 has no error. The communication control unit 604 generates NAC K when the detection result of the decoding unit 603 is incorrect. The generated reply data is output to transmission data forming section 605.

[0104] Further, the communication control unit 604 performs communication control according to the compressed mode. The communication control unit 604 controls the transmission data forming unit 605 and the modulation unit 606 so that communication is performed at, for example, a double transmission rate in the transmission section in the compressed mode. In response to the gap position change request as control information transmitted from the wireless terminal device 200, the communication control unit 604 has not yet changed the gap at the nearest time after receiving the gap section change request. Change the gap position in the gap section (hereinafter sometimes simply referred to as “unchanged gap section”). The gap position can be changed by using the acquisition of the gap position change request as a trigger, and only the predetermined movement width can be changed. In addition, the wireless terminal device 200 transmits the destination information included in the gap position change request. In such a case, it may be changed to the position indicated by the destination information. However, in response to the gear position change request, the communication control unit 604 does not overlap the unchanged gap section with the response data reception timing of the wireless terminal device 200 and the data transmission timing of the wireless terminal device 200. In addition, it is necessary to change the gap position.

Transmission data forming section 605 forms transmission data from input data according to the control of communication control section 604. The formed data is output to modulation section 606. In the gap section, the transmission data forming unit 605 does not output transmission data.

Modulation section 606 modulates transmission data according to the control of communication control section 604. Transmitting section 607 performs predetermined transmission radio processing on the modulated signal, and the radio signal thus obtained is transmitted via the antenna. Next, the operation in the radio communication system having the above configuration will be described with reference to FIG.

As shown in FIG. 12, when the communication control unit 604 of the radio base station device 600 receives the gap position change request 1102 from both the radio terminal device 200 and the radio terminal device 200, the communication control unit 604 The gap section position is changed so that the reception timing of the reply data and the data transmission timing of the wireless terminal device 200 do not overlap. In Fig. 12, since the unchanged gap section overlaps with the reception timing of the reply data R2 at T1, the gap section is changed to T2.

[0109] Also, when the communication control unit 604 of the radio base station apparatus 600 receives the gear position change request 1103 from the radio terminal apparatus 200, the unchanged gap section and the data transmission timing of the radio terminal apparatus 200 do not overlap. The gap section position is changed as follows. In FIG. 12, since the unchanged gap section overlaps with the transmission timing of the packet D4 transmitted from the wireless terminal device 200 at T3, the gap section is changed to T4.

[0110] Here, in the compressed mode, the wireless terminal device and the wireless base station device operate in cooperation, and in HSUPA, the data transmission timing of the wireless terminal device and the reception timing of the reply data Maintains a predetermined time relationship, so that the position where the gap section and the data transmission timing do not overlap and the position where the gap section and the return data reception timing do not overlap are identified in the radio base station equipment. It is possible to do.

[0111] As described above, if there is no change in the position of the gap section, the reception timing of the response data of the radio base station apparatus response to the packet related to the current transmission (current transmission packet) overlaps with the unchanged gap section. In addition, since it is possible to notify the radio base station apparatus that the transmission timing of the packet next to the current transmission packet overlaps with the unchanged gap section, the radio base station apparatus can perform change processing of the unchanged gap section It becomes. As a result, it is possible to prevent a decrease in throughput, and it is possible to avoid the wireless terminal device 200 from performing unnecessary packet transmission, thereby reducing interference.

[0112] Thus, according to the present embodiment, a wireless communication system in which the compressed mode is applied to the downlink dedicated channel and high-speed packet communication is performed on the uplink packet channel. Radio base station apparatus 600 to be used receives receiving means (receiving unit 601, demodulating unit 602, decoding unit 603) for receiving a request for changing the gap position of the transmission power of the uplink packet, and according to the gap position changing request And a communication control unit 604 for changing the next unchanged gap section scheduled timing.

By doing so, the radio base station apparatus 600 can avoid the overlap in advance by changing the unchanged gap section position in response to the gap position change request, thereby reducing the throughput. It is possible to prevent the wireless terminal device 200 from performing unnecessary packet transmission, and interference can be reduced.

[0114] (Embodiment 7)

Embodiment 7 relates to a radio communication system that is configured with radio terminal apparatus 300 according to Embodiment 3 and a radio base station apparatus that performs processing in accordance with a carrier switching cancellation notification transmitted from radio terminal apparatus 300 . The basic configuration of the radio base station apparatus of the present embodiment is the same as that of Embodiment 6, and will be described with reference to FIG.

Communication control section 604 changes the gap position of the next gap section instead of the next gap section in response to the carrier switching cancellation notification as control information transmitted from radio terminal apparatus 300. That is, the communication control unit 604 changes the gear position of the next gap section instead of the next gap section by a predetermined movement width, using the acquisition of the carrier switching cancellation notification as a trigger.

Next, the operation in the radio communication system according to the present embodiment will be described with reference to FIG.

[0117] As shown in FIG. 13, when the communication control unit 604 of the radio base station apparatus 600 receives the carrier switching cancellation notification 1202 of the radio terminal apparatus 300, the next gap section (the gap section of T1 in FIG. ) Instead of the next gap section (T2 gap section) and the return data reception timing, and the gap section (T2 gap section) and the data transmission timing of the wireless terminal device 300 do not overlap. Change the position of the gap section of T2.

[0118] Communication control section 604 does not change the position of the gap section when the next gap section and the reception timing of the return data overlap (T1 in Fig. 13). This is the next wireless terminal device In this gap section, reply data can be received by canceling carrier switching.

[0119] Here, in the compressed mode, the wireless terminal device and the wireless base station device operate in cooperation, and in HSUPA, the data transmission timing of the wireless terminal device and the reception timing of the reply data Maintains a predetermined time relationship, so that the position where the gap section and the data transmission timing do not overlap and the position where the gap section and the return data reception timing do not overlap are identified in the radio base station equipment. It is possible to do.

[0120] Therefore, since the communication control unit 604 can calculate the data transmission timing of the wireless terminal device and the reception timing of the return data for the data transmission, the communication control unit 604 has received the carrier switching cancellation notification from the wireless terminal device. The gap position is changed so that the subsequent gap section and the data transmission timing of the wireless terminal device do not overlap, and the gap section and the reception timing of the return data for the data transmission in the wireless terminal device do not overlap. (In Fig. 13, change of gap section position from T2 to T3)

[0121] As described above, radio base station apparatus 600 is configured to use the carrier switching cancel notification as a trigger for changing the gap position in the next gap section instead of the next gap section. Therefore, the radio terminal apparatus notifies the radio base station apparatus that the next gap section, not the next gap section, and the reception timing of the return data in the radio terminal apparatus and the data transmission timing of the radio terminal apparatus overlap. Thus, the radio base station apparatus can perform a gap section change process. As a result, it is possible to prevent the throughput from decreasing and to prevent the wireless terminal device 200 from performing unnecessary packet transmission, thereby reducing interference.

As described above, according to the present embodiment, the radio base station apparatus 600 used in the radio communication system in which the compressed mode is applied to the downlink dedicated channel and high-speed packet communication is performed in the uplink packet channel is provided. Receiving means (receiving unit 601, demodulating unit 602, decoding unit 603) for receiving the uplink packet transmission source power switch cancel notification, and the next gap in the next unchanged gap section according to the switch cancel notification Section schedule And a communication control unit 604 for changing the timing.

[0123] By doing so, radio base station apparatus 600 can avoid the overlap in advance by changing the position of the unchanged gap section in response to the switching cancellation notification, thereby preventing a decrease in throughput. In addition, since it is possible to avoid the wireless terminal apparatus 200 from performing useless packet transmission, interference can be reduced.

[0124] (Embodiment 8)

Embodiment 8 relates to a radio communication system that is configured with radio terminal apparatus 400 according to Embodiment 4 and a radio base station apparatus that performs processing in accordance with a carrier switching cancellation notification transmitted from radio terminal apparatus 400 . The basic configuration of the radio base station apparatus of the present embodiment is the same as that of Embodiment 6, and will be described with reference to FIG.

Communication control section 604 changes the gap section position in response to a gap position change request as control information transmitted from radio terminal apparatus 400. In addition, the communication control unit 604 performs a gap other than the gap position change request related to the change of the changed gap section immediately before the gap section (changed gap section) whose position has been changed in response to the gap position change request. In response to the position change request, the position of the unchanged gear section after the changed gap section is changed. In addition, the communication control unit 604 transmits the gear position change request other than the gap position change request related to the change of the changed gap section immediately before the changed gap section at the timing of transmission. If no other gap position change request is received, change the position of the unchanged gap section after the changed gap section! /.

[0126] As shown in Fig. 14, mobile terminal apparatus 400 uses radio gap station position change request to change the position of the unchanged gap section after the transmission timing of the gap position change request to radio base station apparatus 600. To request. When the communication control unit 604 of the radio base station apparatus 600 receives the gap position change request 1302 from the radio terminal apparatus 400, the unchanged gap section (the gap section of T1 in FIG. 14) that has not been repositioned and the radio terminal The gap section position is changed so that the reception timing of the reply data in the device 400 does not overlap. In Fig. 14, the gap interval is changed to T2, because the unchanged gap interval overlaps with the reception timing of the reply data R2 at T1. [0127] In addition, in Fig. 14, when a gap position change request other than the gap position change request related to the change of the changed gap section immediately before the changed gap section (T2 gap section) is transmitted. Since the other gap position change request is not received, the communication control unit 604 does not change the position of the unchanged gap section (T3 gap section) after the changed gap section. If a gap position change request is sent at the timing of D3, the position of the subsequent unchanged gap section (T3 gap section) is not changed, not the position change of the changed gap section (T2 gap section). It will be awkward.

[0128] Here, in the compressed mode, the wireless terminal device and the wireless base station device operate in cooperation, and in HSUPA, the data transmission timing of the wireless terminal device and the reception timing of the reply data Maintains a predetermined time relationship, so that the position where the gap section and the data transmission timing do not overlap and the position where the gap section and the return data reception timing do not overlap are identified in the radio base station equipment. It is possible to do.

[0129] Further, since the communication quality is lower than the predetermined level at the timing of D3, the gap position change request is not transmitted from the wireless terminal device 400. This is because if the communication quality is less than a predetermined level, it is highly possible that the packet will be retransmitted even if the gap position is changed. Therefore, when the reception timing of the return data from the radio base station apparatus for the packet related to the current transmission (current transmission packet) overlaps with the unchanged gap section, and when the next transmission timing of the current transmission packet is the gap section The gap position change request is transmitted by sending the gap position change request only when the communication quality is equal to or higher than a predetermined level. It can be avoided. Also, for wireless terminal device 400, it is more efficient to perform different carrier measurement without changing the GAP position.

[0130] In the above description, the line quality measurement value is equal to or greater than the preset threshold value! /, And the next data transmission timing overlaps with the timing of the unchanged gap section, or the line quality measurement value is It is more than a preset threshold value and the response data for data transmission The case where the gap position change request is output to the packet modulation unit 105 when the reception timing overlaps with the timing of the unchanged gap section has been described. However, the operation of outputting a gap position change request to the packet modulator 105 is acceptable only when the line quality measurement value is equal to or greater than a preset threshold value and the next data transmission timing overlaps with the timing of the unchanged gap section. Alternatively, a gap position change request is output to the packet modulator 105 only when the channel quality measurement value is equal to or greater than a preset threshold value and the reception timing of the return data for data transmission overlaps with the timing of the unchanged gap section. It works.

[0131] As described above, the wireless terminal device 400 uses the gap position change request, not the position change of the changed gap section after the transmission timing of the gear position change request, but the changed gap section. It is used to request the position change of the unchanged gap section later. Radio base station apparatus 600 is configured so that an unchanged gap section, which is not a gap section whose position has already been changed to a position where it does not overlap, does not overlap with the reception timing of return data and the data transmission timing of the wireless terminal apparatus. In addition, since the position of the unchanged gear section can be changed, the throughput can be prevented from being lowered, and the wireless terminal device 400 can be avoided from performing unnecessary packet transmission, thereby reducing interference. can do.

[0132] Furthermore, when the wireless terminal device 400 overlaps the unchanged gap section with the reception timing of the return data from the wireless base station device for the packet related to the current transmission (current transmission packet), and the current transmission A gap position change request should be transmitted only when the next transmission timing of the packet corresponds to at least one of the cases where it overlaps with the unchanged gap section and the communication quality is equal to or higher than a predetermined level. As a result, useless transmission of a gap position change request can be avoided. As a result, interference can be reduced.

[Embodiment 9]

Embodiment 9 relates to a radio communication system that includes the radio terminal device 500 of Embodiment 5 and a radio base station device that performs processing according to the carrier switching cancellation notification transmitted from the radio terminal device 500 . Base of radio base station apparatus of this embodiment Since this configuration is the same as that of Embodiment 6, it will be described with reference to FIG.

[0134] Communication control section 604 changes the gap position of the next gap section instead of the next gap section in response to the carrier switching cancellation notification as control information transmitted from radio terminal apparatus 500. In addition, the communication control unit 604 transmits a carrier switching cancel notification other than the carrier switching cancellation notification related to the change of the gap section immediately before the gap section before the position is changed according to the carrier switching cancellation notification. If the other carrier switching cancel notification is not received at the timing, the change of the gap section position is cancelled. On the other hand, when another carrier switching cancellation notification is received at that timing, the position of the gap section that comes next after the changed gap section is changed.

[0135] As shown in FIG. 15, when the communication control unit 604 of the radio base station device 600 receives the carrier switching cancellation notification 1402 of 500 radio terminal devices, the next gap interval (the gap interval of T1 in FIG. ) Instead of the next gap section (T2 gap section) and the response data reception timing, and the gap section (T2 gap section) and the data transmission timing of the wireless terminal device 500 do not overlap. Change the position of the gap section of T2. The changed gap section is located at T3.

Also, as shown in FIG. 15, communication control section 604 changes the corresponding gear section immediately before the gap section (T2 gap section) before the position is changed in response to the carrier switching cancellation notification. If the other carrier switching cancel notification other than the carrier switching cancellation notification is not received at the timing when the other carrier switching cancel notification is transmitted (the timing when D3 in FIG. 15 is transmitted), Cancel the change of the gap section position (change of the gap section position from T2 to T3). This is because the channel quality between the radio base station apparatus 600 and the radio terminal apparatus 500 is predicted to be low. In this case, even if the radio terminal apparatus 500 actually transmits a packet, the radio base station apparatus There is a high possibility that the wireless terminal device 500 cannot receive the data, or the wireless terminal device 500 maintains a state where it can receive and demodulate the reply data from the wireless base station device 600! Since it is high, it is more efficient to perform different carrier measurement without changing the GAP position when the line quality measurement value is low. [0137] Here, in the compressed mode, the wireless terminal device and the wireless base station device operate in cooperation, and in HSUPA, the data transmission timing of the wireless terminal device and the reception timing of the reply data Maintains a predetermined time relationship, so that the position where the gap section and the data transmission timing do not overlap and the position where the gap section and the return data reception timing do not overlap are identified in the radio base station equipment. It is possible to do.

From another point of view, by receiving the carrier switching cancellation notification of the communication terminal power, the base station side receives the gap section timing and the data transmission timing overlapping position, and the gap section timing and the received reply data. It is also possible to specify the position where the timing overlaps. That is, when the communication terminal transmits the carrier switching cancellation notification 1402, it is possible to specify the timing at which the next carrier switching cancellation notification 1403 is transmitted.

[0139] Note that, in the above description, when the channel quality measurement value is equal to or greater than a preset threshold value and the next gap section instead of the next gap section overlaps the data transmission timing of the wireless terminal device, Or, when the channel quality measurement value is equal to or greater than a preset threshold value and the next gap section, not the next gap section, and the reception timing of the return data for data transmission in the wireless terminal device overlap, The case where the switching cancellation notification is output to the packet modulation unit 105 has been described. However, only when the channel quality measurement value is equal to or greater than the preset threshold value and the next gap section instead of the next gap section overlaps with the data transmission timing of the wireless terminal device, the carrier switching cancel cell notification is made. Is output to the packet modulation unit 105, or the channel quality measurement value is equal to or greater than a preset threshold value, and the next gap interval, not the next gap interval, and the data transmission in the wireless terminal device An operation of outputting a carrier switching cancellation notification to the packet modulation unit 105 may be performed only when the reception timing of the return data overlaps.

[0140] As described above, radio base station apparatus 600, other than the carrier switching cancellation notification related to the change of the gap section, immediately before the gap section before the position is changed according to the carrier switching cancellation notification. The carrier switching cancellation notification for In the imming, if the other carrier switching cancel notification is not received, the change of the gap section position is canceled. In this way, if it is predicted that the channel quality between the radio base station apparatus 600 and the radio terminal apparatus 500 is low, the radio base station station 500 can actually transmit a packet even if the radio terminal apparatus 500 transmits a packet. Possible that device 600 is not likely to be received, or that wireless terminal device 500 is in a state where it can receive and demodulate reply data from wireless base station device 600 and cannot receive it correctly. Therefore, it is possible to reduce the throughput by returning the gap position to the position before the change, rather than creating the data transmission opportunity and the return data reception opportunity of the wireless terminal device 500 while changing the gap section position. It is possible to prevent the useless packet transmission and prevent the interference.

[0141] Thus, according to the present embodiment, communication control section 604 does not receive a switch cancel notification at the switch cancel notification reception timing immediately before the gap section prediction timing before the change. Cancel the gap position change.

[0142] By doing this, when it is predicted that the channel quality is low, the gap position is not changed, and the opportunity for data transmission and the reception of the return data is not made without changing the position of the gap section. Can be returned to the position before the change. As a result, it is possible to prevent a decrease in throughput and avoid unnecessary transmission of packets, thereby reducing interference.

Industrial applicability

[0143] The radio terminal apparatus and radio base station apparatus of the present invention are useful as those capable of preventing a drop in loop and reducing interference.

Claims

The scope of the claims

[1] A wireless terminal device used in a wireless communication system in which a compressed mode is applied to a downlink dedicated channel and high-speed packet communication is performed on an uplink packet channel, and acquires a gap section scheduled timing in the compressed mode Gap timing acquisition means,

Packet transmission control means for controlling uplink packet transmission timing;

The gap interval scheduled timing, the uplink packet transmission scheduled timing, and the uplink packet transmission scheduled timing force are estimated. The upstream packet receiving side power is estimated. Generating means for generating notification information for notifying the receiving side that a section overlaps at least one of the uplink packet transmission scheduled timing and the reception scheduled timing;

A wireless terminal device comprising:

[2] The generation means includes at least one of a scheduled transmission timing of a next transmission packet following a current transmission packet related to a next transmission and a reception scheduled timing of reception availability notification information for the next transmission packet, and a next gap. The wireless terminal device according to claim 1, wherein a gap position change request is included in the notification information when the scheduled section timing overlaps.

[3] The apparatus further comprises carrier switching means for switching the transmission / reception carrier between the transmission section and the gap section in the compressed mode.

The generation means, when at least one of the scheduled transmission timing of the current transmission packet related to the next transmission and the scheduled reception timing of the reception availability notification information for the current transmission packet overlaps with the next gap section scheduled timing, The notification information includes the transmission / reception carrier switching cancellation notification,

2. The radio terminal apparatus according to claim 1, wherein the carrier switching unit stops switching between transmission and reception carriers at the next scheduled gap section timing in response to the switching cancellation notification.

[4] A communication quality measurement means for measuring communication quality is further provided,

If the measurement communication quality is less than the predetermined level, the gap position change request is included. The wireless terminal device according to claim 2, wherein the transmission of the notification information is stopped.

[5] A communication quality measuring means for measuring communication quality is further provided,

3. The wireless terminal device according to claim 2, wherein when the measured communication quality is less than a predetermined level, transmission of notification information including the switching cancellation notification is stopped and the transmission / reception carrier switching is executed.

[6] A base station apparatus used in a radio communication system in which a compressed mode is applied to a downlink dedicated channel and high-speed packet communication is performed on an uplink packet channel, and a gap position change request from an uplink packet transmission source Receiving means for receiving, and in response to the gap position change request, control means for changing the next unchanged gap section scheduled timing;

A radio base station apparatus comprising:

[7] A base station apparatus used in a wireless communication system in which a compressed mode is applied to a downlink dedicated channel and high-speed packet communication is performed on an uplink packet channel, and a switching cancellation notification from an uplink packet transmission source Receiving means for receiving, control means for changing the next gap section scheduled timing of the next unchanged gap section in response to the switching cancellation notification,

A radio base station apparatus comprising:

[8] The control unit according to claim 7, wherein the control unit cancels the change of the gap position when the switching cancellation notification is not received at the switching cancel notification reception timing immediately before the gap section scheduled timing before the change. The radio base station apparatus described.