WO2005122432A1 - 無線通信装置及び無線通信方法 - Google Patents
無線通信装置及び無線通信方法 Download PDFInfo
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- WO2005122432A1 WO2005122432A1 PCT/JP2005/010042 JP2005010042W WO2005122432A1 WO 2005122432 A1 WO2005122432 A1 WO 2005122432A1 JP 2005010042 W JP2005010042 W JP 2005010042W WO 2005122432 A1 WO2005122432 A1 WO 2005122432A1
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- 238000004891 communication Methods 0.000 title claims abstract description 273
- 238000000034 method Methods 0.000 title claims description 25
- 238000005259 measurement Methods 0.000 claims abstract description 178
- 230000001629 suppression Effects 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims description 67
- 239000000969 carrier Substances 0.000 claims description 50
- 238000010586 diagram Methods 0.000 description 18
- 238000012935 Averaging Methods 0.000 description 10
- 238000012544 monitoring process Methods 0.000 description 5
- 238000012937 correction Methods 0.000 description 4
- 239000000284 extract Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000005562 fading Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
- H04W76/38—Connection release triggered by timers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
Definitions
- the present invention relates to a wireless communication apparatus and a wireless communication method for switching to another carrier frequency and carrier frequency currently used for communication.
- Non-Patent Document 1 which is a standard document of W-CDMA (Wideband Code Division Multiple Access), is known.
- the compressed mode In the compressed mode, during communication between a base station and a communication terminal, a period in which the base station transmits data locally at double speed in a certain cycle and a period in which transmission is paused It is a mode to establish and communicate.
- the communication terminal in compressed mode receives data at twice the speed in the section in which data is present, switches the carrier frequency in the section in which data is not present (section in which transmission is suspended by the base station), and the current communication is performed. Measure the reception quality of the carrier different from the carrier used in (hereinafter “different carrier”).
- the communication terminal When the measurement of the reception quality of different carriers (hereinafter referred to as “different carrier measurement”) is completed, the communication terminal notifies the base station of the reception quality of the plurality of measured carriers.
- the base station switches carriers for data communication after coordination with the communication terminal in consideration of the carrier reception quality and congestion degree of the communication terminal. With this series of operations, even in the case of continuous communication such as voice communication, switching to another carrier can be performed while continuing the communication.
- HSDPA High Speed Downlink Packet Access
- Non-Patent Document 1 and Chapter 6.4 of Non-patent Document 2 which are standards documents of W-CDMA is generally known as a system for performing communication. It is done.
- HSDPA is a scheme in which a plurality of communication terminals use a common channel (hereinafter, "shared channel” and "!) In time division.
- the communication terminal measures the reception quality of packets and reports the measured reception quality to the base station.
- the base station can efficiently use the shared channel by assigning the channel to the communication terminal with good reception quality.
- the communication terminal receives the shared channel if it is assigned to itself and receives it, and does not perform the receiving operation if the shared channel is assigned.
- packet communication such as HSDPA is efficient in communication where user data is generated in bursts, for example, as in the case of Internet access.
- continuous communication such as voice communication
- DPCH D edited Physical Channel
- FIG. 1 is a block diagram showing the configuration of a wireless communication terminal apparatus.
- the signal transmitted from the base station is received by the RF receiver 12 via the antenna 11, and predetermined radio reception processing such as down conversion is performed.
- the RF receiver 12 outputs continuous data and packet data in the received signal to different demodulators. That is, the continuous data is output to the continuous data demodulation unit 13, and the packet data is output to the packet data demodulation unit 16.
- the continuous data demodulation unit 13 demodulates continuous data
- the packet data demodulation unit 16 demodulates packet data.
- the continuous data signal demodulated by the continuous data demodulation unit 13 is decoded as user data by the continuous data decoding unit 14 and output.
- the continuous data signal generally includes control data, and the control data is decoded by the control data decoding unit 15 and output.
- the packet data demodulation unit 17 determines whether the packet data signal demodulated by the packet data demodulation unit 16 is the signal strength for itself or not. The packet data signal is decoded in the decoding unit 18 to obtain packet data.
- the instantaneous reception quality measurement unit 19 measures the reception quality of the packet data signal, and reports the measured reception quality to the base station.
- the reception quality of the packet data signal becomes information for allocating the HS DPA shared channel in the base station.
- the different carrier reception timing setting unit 20 notifies the carrier switching control unit 21, the carrier reception quality measurement unit 22, and the packet reception control unit 23 that the different carrier measurement is to be performed at the timing of the compressed mode.
- the carrier switching control unit 21 controls switching of the carrier frequency to be received by the RF receiving unit 12 at timing of the compressed mode.
- the carrier reception quality measurement unit 22 normally measures the reception quality of the carrier frequency used by the communication terminal for communication, but performs different carrier measurement at the timing notified by the different carrier reception timing setting unit 20. , Output the result.
- the packet reception control unit 23 controls the packet data demodulation unit 16 and the instantaneous reception quality measurement unit 19 so as not to receive a packet when performing different carrier measurement. That is, the packet data demodulation section 16 receives all packet data during the different carrier measurement because the different carrier does not transmit or receive packet signals for the own station even if it is transmitted. Stop. For this reason, the instantaneous reception quality measurement unit 19 that measures the reception quality of the packet data signal received by the carrier frequency currently used for communication is also used during the different carrier measurement for the section where normal measurement may not be possible. Stop the measurement.
- the compressed mode is a mode applied to continuous data communication such as voice communication, and is not applied to packet communication.
- the different carrier measurement has priority over the packet communication, and the packet communication is suspended during that time.
- FIG. 1 in order to show a more general configuration, continuous user Although the configuration in which data is also received simultaneously with packet data is shown, the communication terminal receives a continuous data channel in order to exchange control information etc. generally even if such voice communication is not effective. There is a need to.
- Non-Patent Document 1 3GPP TS 25.212 V5.5.0 (3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Multiplexing and channel coding (FD D) (Release 5))
- Non-Patent Document 2 3GPP TS 25.214 V5.5.0 (3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Physical layer procedures (Release 5))
- An object of the present invention is to provide a wireless communication apparatus and a wireless communication method for performing different carrier measurement without lowering the throughput.
- the wireless communication apparatus is a wireless communication apparatus which performs communication by switching a plurality of different carriers, and determines whether packet communication is continued and power is paused or not. If it is determined that packet communication is being continued, the carrier power that is currently used for communication suppresses switching to another carrier, which is another carrier, and pauses bucket communication. If it is determined that the second carrier is determined, the configuration includes a suppression means for permitting switching to another carrier, and a carrier reception quality measuring means for measuring the reception quality of the different carrier for which switching is permitted by the suppression means. take. According to this configuration, when packet communication is being continued, switching to a different carrier power is currently used for communication, and switching to different carriers is suppressed, and packet communication is paused. Since the packet communication is not interrupted by permitting switching to different carriers, different carriers can be measured without reducing the throughput.
- the different carrier measurement is suppressed during packet communication, and the different carrier measurement is performed without interrupting the packet communication by performing the different carrier measurement in the packet idle period in which the packet communication is not performed. It is possible to measure different carriers without lowering the throughput.
- FIG. 1 A block diagram showing the configuration of a wireless communication terminal device
- FIG. 2 A block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 1 of the present invention
- FIG. 3 (A) A diagram showing the case where different carriers are measured in the idle period of the packet, (B) a diagram showing the case where the packet continues for a long time!
- FIG. 4 A flowchart showing different carrier measurement control of the radio communication terminal apparatus according to Embodiment 1 of the present invention
- FIG. 5 A block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 2 of the present invention
- FIG. 6 A block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 3 of the present invention
- FIG. 7 A block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 4 of the present invention
- FIG. 8 A block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 5 of the present invention
- FIG. 9 A block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 6 of the present invention
- FIG. 10 A block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 7 of the present invention. Best Mode for Carrying Out the Invention
- FIG. 2 is a block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 1 of the present invention.
- a packet communication system in which a shared channel is shared in time division between a plurality of wireless communication terminals (hereinafter referred to as "communication terminals") will be described as an example.
- the RF receiving unit 102 receives the signal transmitted from the base station via the antenna 101, down-converts the received signal (received signal), etc., and transmits the baseband signal as continuous data.
- the demodulation unit 103, the packet data demodulation unit 106, the instantaneous reception quality measurement unit 109, and the carrier reception quality measurement unit 110 are output. Further, the RF receiving unit 102 switches the carrier to be received based on the control of the carrier switching control unit 113.
- the continuous data demodulation unit 103 performs processing such as despreading and synchronous detection on the baseband signal output from the RF receiving unit 102 to extract a continuous data signal.
- the extracted continuous data signal generally includes continuous user data such as voice communication and control data for controlling the communication terminal.
- the extracted continuous data signal is output to the continuous data decoding unit 104 and the control data decoding unit 105.
- Continuous data decoding section 104 extracts the continuous data signal user data portion outputted from continuous data demodulation section 103, performs error control such as error correction decoding if necessary, and outputs continuous user data. Output.
- control data decoding section 105 extracts the continuous data signal strength control data part outputted from continuous data demodulation section 103, performs error control such as error correction decoding if necessary, and Output
- error control such as error correction decoding if necessary
- the packet data demodulation unit 106 performs processing such as despreading and synchronous detection on the baseband signal output from the RF receiving unit 102, and extracts a packet data signal.
- the extracted packet data signal includes, as control information for packet communication, information indicating which communication terminal the packet is addressed to (hereinafter referred to as "destination information"), transmission rate information, etc. It is done.
- the extracted packet data is output to the packet control information decoding unit 107 and the packet data decoding unit 108.
- the packet control information decoding unit 107 decodes control information such as destination information and transmission rate information in the packet data signal output from the packet data demodulation unit 106. It is determined from the decoded destination information whether or not the packet data is addressed to the own station, and the determination result is output to the packet data decoding unit 108.
- the packet data decoding unit 108 outputs the determination result output from the packet control information decoding unit 107. Based on the result, the packet data signal output from the packet data demodulation unit 106 is decoded. That is, if the determination result is addressed to the own station, the packet data signal is decoded and user packet data is output, and if the determination result is not addressed to the own station, the packet data signal output from the packet data demodulation unit 106 is discarded. .
- the decoded user packet data is output to carrier measurement control section 111.
- Instantaneous reception quality measurement unit 109 analyzes the baseband signal output from RF reception unit 102, and measures instantaneous reception quality.
- the instantaneous reception quality of the measured baseband signal is transmitted to the base station.
- the base station can perform efficient packet communication by determining the communication terminal to which the shared channel is to be allocated, based on the instantaneous reception quality reported from each communication terminal.
- Carrier reception quality measurement unit 110 measures the reception quality of the carrier using the baseband signal output from RF reception unit 102.
- the reception quality the reception power per code, the S / N ratio, etc. are known.
- carriers to be measured not only the carrier frequency currently used for communication but also different carriers are measured, and the results of carrier measurement are reported to the base station.
- the carrier measurement control unit 111 analyzes the user packet data decoded by the packet data decoding unit 108 to continuously receive and continuously receive packets addressed to the own station. If so, it continues to determine how long, and based on the result of this determination, generates a signal that permits different carrier measurement (different carrier measurement enable signal). The generated different carrier measurement permission signal is output to the different carrier reception timing setting unit 112. The details of the carrier measurement control unit 111 will be described later.
- the different carrier reception timing setting unit 112 recognizes that the different carrier measurement is permitted when the different carrier measurement permission signal output from the carrier measurement control unit 111 is acquired, and transmits the base station transmission in the compressed mode.
- the idle period (hereinafter referred to as “Gap timing”) is notified to the carrier reception quality measurement unit 110, the carrier switching control unit 113, and the packet reception control unit 114. Also, when different carrier measurement is not permitted, notification of gap timing is not performed.
- Carrier switching control section 113 is notified from different carrier reception timing setting section 112.
- the carrier switching signal is output to the RF receiving unit 102 at the gap timing.
- the RF receiving unit 102 switches the carrier frequency currently used for communication to another carrier frequency (different carrier) based on the carrier switching signal to perform reception.
- the carrier switching control unit 113 again outputs a carrier switching signal to the RF receiving unit 102, and the RF receiving unit 102 returns to the carrier frequency in communication and receives.
- the packet reception control unit 114 controls the bucket data demodulation unit 106 and the instantaneous reception quality measurement unit 109 so as not to receive a packet at Gap timing. That is, since packet signals for the own station are not transmitted by the base station power or can not be received if transmitted by different carriers, packet data demodulation section 106 can not receive all packets during different carrier measurement. Stop receiving data. Therefore, instantaneous reception quality measurement unit 109, which measures the reception quality of the packet data signal received at the carrier frequency currently used for communication, also measures the interval during which the normal measurement may not be possible during the different carrier measurement. Stop the measurement.
- the packet continuity determination unit 121 observes the user packet data output from the packet data decoding unit 108, and determines whether or not the packet addressed to the own station is continuously received. In general, in packet communication, a packet continues intermittently for a certain period of time and then there is a pause period, and the packet continues intermittently again. That is, even during the packet duration, there is always packet data that is not always present, but it is a very short section but there is also a section without bucketing.
- whether or not the packet continues is determined by setting time X longer than the short interval in which the packet continues and checking whether the packet exists during this time X. be able to. That is, when time X has passed since packet reception is not received, the packet reception is continued, and when the packet is not received, the power section is determined to be a packet pause section. do it. If it is determined that the packet is a pause period, the determination result is output to the different carrier measurement suppressing section 122.
- the different carrier measurement suppressing unit 122 as a suppressing unit measures the different carriers so that the determination result output from the packet continuation determining unit 121 indicates that the packet is paused.
- the different carrier measurement permission signal is generated, and the generated different carrier measurement permission signal is output to the different carrier reception timing setting unit 112.
- the determination result output from the packet continuity determination unit 121 indicates the continuity of the packet, measurement of different carriers is not performed, and generation of a different carrier measurement permission signal is not performed.
- the different carrier measurement suppression unit 122 measures the force at the packet start time, and generates the different carrier measurement permission signal if it does not enter the pause period during the time Y (Y> X), so that a long time difference occurs. It is possible to prevent the carrier measurement from becoming impossible.
- Fig. 3 ⁇ ⁇ shows the case of performing different carrier measurement in the idle period of the packet. Until the time X elapses after the packet traffic continues intermittently, the different carrier measurement is not permitted, and when the time X elapses, it is determined to be a packet pause period and the different carrier measurement is permitted. .
- FIG. 3 ⁇ shows the case where the packet continues for a long time. If the time continues after the start of the packet and the packet continues, as described in the background art, the reception of the packet is interrupted and the measurement of different carriers is prioritized. As a result, even if the packet continues for a long time, switching to the different carrier can be smoothly performed, so that the decrease in throughput can be avoided in the whole system.
- FIG. 4 is a flowchart showing different carrier measurement control of the radio communication terminal apparatus according to Embodiment 1 of the present invention.
- step (hereinafter, abbreviated as “ST”) 301 the different carrier measurement suppressing section 122 starts the timer 1 with the start of packet transmission.
- different carrier measurement suppressing section 122 determines whether or not timer 1 is less than time Y, and if less than time Y (YES), the process proceeds to ST303, where time Y is longer than or equal to NO (NO). If there is, the process moves to ST308.
- the packet continuity determination unit 121 receives a packet addressed to the own station, determines whether or not the packet is received, and a packet addressed to the own station is received (NO). , ST304 if it is determined that a packet has not been received (YES) Migrate to
- the packet continuity determination unit 121 starts the timer 2 and measures the time when no packet is received. In ST305, packet continuity determination section 121 determines whether or not timer 2 is less than time X. If less than time X (YES), the process proceeds to ST306, and if time X is more than X (NO), the process proceeds to ST308 Transition.
- the packet determination unit 121 determines whether or not the reception of the packet has been resumed, and if it is determined that the reception of the packet has been resumed (YES), the process proceeds to ST307 to receive the packet. Is determined not to be resumed (NO), the process returns to ST305. In ST307, the packet continuation determination unit 121 clears timer 2 and returns to ST302.
- the different carrier measurement suppressing section 122 when it is determined in ST 302 that timer 1 is longer than or equal to time Y, that is, when it is determined that the packet addressed to the own station has been continuously received for a long time, the different carrier measurement suppressing section 122 Generates a different carrier measurement permission signal. Similarly, if it is determined in ST 305 that the timer 2 is equal to or greater than X, that is, if it is determined that the reception of the packet addressed to the own station is in the idle period, the different carrier measurement suppressing section 122 measures the different carriers. Generate a permission signal.
- the carrier frequency received by the RF receiving unit 102 is switched, and the carrier receiving quality measuring unit 110 performs different carrier measurement. Then, the different carrier measurement suppressing unit 122 clears the timer 1 in ST310, and the packet continuity determining unit 121 clears the timer 2 in ST311.
- packet continuity determination section 121 determines whether or not the reception of packet data has been completed. If it has been completed, the different carrier measurement control is ended, and if it has not been completed, it returns to ST 301. The operations of ST301 to ST312 are repeated until data reception is completed.
- Second Embodiment In the first embodiment, while performing differential calibration in a packet idle period in which a packet addressed to the own station is not received, and when a packet addressed to the own station is continuously received for a long time, packet transmission is performed.
- packet communication is prioritized over different carrier measurement when there is no reception of continuous user data such as a voice call. The case will be described.
- FIG. 5 is a block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 2 of the present invention. However, parts in FIG. 5 common to FIG. 2 are assigned the same reference numerals as in FIG. 2 and their detailed explanations are omitted. 5 differs from FIG. 2 in that continuous data decoding unit 104 is changed to data decoding unit 401, continuous data reception determination unit 403 is added, and different carrier measurement suppressing unit 122 is different carrier measurement suppressing unit. By changing to 404, the carrier measurement control unit 111 is changed to the carrier measurement control unit 402.
- Continuous data decoding section 401 extracts continuous data signal power user data, performs error control such as error correction decoding if necessary, and receives continuous data of continuous user data by carrier measurement control section 402. Output to the judgment unit 403.
- Continuous data reception determination unit 403 monitors the continuous user data output from continuous data decoding unit 401, determines whether or not there is continuous user data, and determines the difference measurement suppression. Output to section 404.
- the different carrier measurement suppressing unit 404 measures different carriers even if there is continuous user data that is more than just permitting different carrier measurement. Allow That is, continuous user data communication such as voice communication has a higher demand for maintaining stable communication than packet communication and the like. Therefore, it is necessary to always keep track of the different carrier states and be able to switch the carrier frequency at any time. Therefore, when continuous user data is received, different carrier measurements are prioritized over packet communication as described in the background art above. In other words, when continuous user data is not received, packet communication is prioritized over different carrier measurement.
- the power used to determine whether continuous data communication is being performed by actually monitoring continuous user data, for example, continuous data based on control information or the like. It is determined that communication is being done.
- Embodiment 1 explained the case where measurement control of different carriers is performed by monitoring packet traffic addressed to the own station, but in Embodiment 3 of the present invention, the base station is not targeted for packet transmission.
- a description will be given of the case where different carrier measurement control is performed based on the packet pause information by transmitting packet pause information indicating a packet pause period to the communication terminal.
- FIG. 6 is a block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 3 of the present invention.
- the packet control information decoding unit 107 is changed to a packet control information decoding unit 501
- the packet continuation determination unit 121 is changed to a packet continuity determination unit 503
- different carrier measurement suppression is performed.
- the carrier measurement control unit 111 is changed to the carrier measurement control unit 502.
- Packet control information decoding section 501 decodes packet pause information indicating packet pause sections not to be sent as packets, in addition to destination information and transmission rate information which are control information in the packet data signal.
- the decoded packet pause information is output to the packet continuity determination unit 503 of the carrier measurement control unit 502.
- the packet continuity determination unit 503 determines whether or not the packet continues to be suspended, and the determination result is used as the different carrier measurement suppressing unit. Output to 504. That is, if the packet pause information is output from the packet control information decoding unit 501, it is determined that the packet addressed to the local station is paused, and if the packet pause information is not output from the packet control information decoding unit 501, the local station It is determined that the packet addressed to is continuously received.
- the different carrier measurement suppression unit 504 If the determination result output from the packet continuation determination unit 503 indicates that the packet is paused, the different carrier measurement suppression unit 504 generates a different carrier measurement permission signal so as to measure different carriers, The generated different carrier measurement permission signal is output to the different carrier reception timing setting unit 112. On the other hand, when the determination result output from the packet continuation determination unit 503 indicates the continuation of the bucket, measurement of different carriers is not performed, and generation of a different carrier measurement enable signal is not performed as in the case. Also, the different carrier measurement suppressing section 504 measures the time from the packet start time point, and generates a different carrier measurement permission signal if it does not enter the idle period during the time Y (Y> X).
- packet pause information may be included in control information in continuous data communication.
- the continuous data signal is decoded by the control data decoding unit 105, and the packet pause information is output to the different carrier measurement suppressing unit 504.
- different carrier measurement control is performed using packet pause information that is also transmitted by the base station power, whereby communication terminals that are desired to be smaller and consume less power are required.
- the burden of monitoring packets addressed to stations can be reduced, and throughput degradation can be avoided.
- FIG. 7 is a block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 4 of the present invention.
- packet control information decoding unit 107 is changed to packet control information decoding unit 601 and transmission rate averaging unit 603 is added, and different carrier measurement suppressing unit 122 is used as a different carrier.
- the carrier measurement control unit 111 is changed to the carrier measurement control unit 602.
- the packet control information decoding unit 601 decodes control information such as destination information and transmission rate information in the packet data signal output from the packet data demodulation unit 106.
- the decoded transmission rate information is output to transmission rate averaging section 603 of carrier measurement control section 602. Ru.
- the transmission rate averaging unit 603 averages the transmission rate by a fixed amount based on the transmission rate information output from the packet control information decoding unit 601.
- the transmission rate of packet data signals fluctuates according to the reception quality of the communication terminal, here, the average transmission rate in a certain section is calculated.
- the averaging time is, for example, about 100 ms.
- the averaged transmission rate is output to the different carrier measurement suppressing section 604.
- the different carrier measurement suppressing unit 604 is configured to transmit the transmission rate output from the transmission rate averaging unit 603 only by permitting the different carrier measurement when the determination result indicating the pause of the packet is output from the packet continuation determination unit 121. Allow different carrier measurements even if the rate is below a certain threshold.
- a low transmission rate takes longer than a high transmission rate. Therefore, at low transmission rates, the pause intervals of packets will be short, and different carrier measurements will not end at packet pause intervals. Also, if the transmission rate is low, you should move to a carrier with a higher transmission rate other than the one currently used for communication, in order to improve throughput. From such a thing, when the transmission rate is low, it is desirable to prioritize different carrier measurement over packet communication and smoothly switch to another carrier, as described in the above-mentioned background art.
- the average value of the transmission rate of packets is calculated, and when the transmission rate is low, different carriers can be smoothly measured by prioritizing different carriers measurement over packet communication. You can switch to
- FIG. 8 is a block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 5 of the present invention.
- parts in FIG. 8 common to FIG. 2 are assigned the same reference numerals as in FIG. 2 and detailed explanations thereof will be omitted.
- 8 differs from FIG. 2 in that the instantaneous reception quality measuring unit 109
- the carrier measurement control unit 111 becomes the carrier measurement control unit. The point is changed to 702.
- Instantaneous reception quality measurement unit 701 analyzes the baseband signal output from RF reception unit 102, and measures the instantaneous reception quality (packet quality) of the received packet data signal.
- the instantaneous reception quality (packet quality) of the measured baseband signal is transmitted to the base station, while being output to the reception quality averaging unit 703 of the carrier measurement control unit 702.
- Reception quality averaging section 703 averages the reception quality measurement results output from instantaneous reception quality measurement section 701 by a fixed amount.
- the reception quality of the propagation channel fluctuates instantaneously due to the influence of fading etc.
- the average reception quality in a certain section is calculated here.
- the averaging time is, for example, about 100 ms.
- Information on the averaged reception quality is output to the different carrier measurement suppression unit 704.
- the different carrier measurement suppressing unit 704 receives the output from the reception quality averaging unit 703, which only allows the different carrier measurement when the determination result indicating that the packet is paused is output from the packet continuation determining unit 121. Allow different carrier measurements even if the quality is below a certain threshold.
- reception quality is poor in packet communication, errors are more likely to occur and the transmission rate is lower, and the time required to transmit the same amount of data is better than when the reception quality is good. Long. Therefore, if the reception quality is poor, the pause interval of the packet will be shortened, and the measurement of different carriers will not end in the pause interval. Also, if the reception quality is poor, in order to improve the throughput, it is necessary to shift to a carrier with better reception quality other than the current carrier using current communication. From these facts, when reception quality is poor, it is desirable to prioritize different carrier measurement over packet communication and smoothly switch to a different carrier, as described in the background art above.
- reception quality may also be measured separately for baseband signal power.
- reception quality is averaged, and when reception quality is poor, it is possible to smoothly switch to another carrier by giving different carrier measurement priority over packet communication. It is possible to
- the sixth embodiment of the present invention will be described in the case where priority is given to packet transmission over different carrier measurement when the moving speed of the communication terminal is low.
- FIG. 9 is a block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 6 of the present invention.
- parts in FIG. 9 common to FIG. 2 are assigned the same reference numerals as in FIG. 2 and detailed explanations thereof will be omitted.
- 9 differs from FIG. 2 in that the RF receiving unit 102 is changed to the RF receiving unit 801, the moving speed estimation unit 803 is added, and the different carrier measurement suppressing unit 122 is changed to the different carrier measurement suppressing unit 804.
- the carrier measurement control unit 111 is changed to the carrier measurement control unit 802.
- RF reception section 801 receives a signal to which base station power is also transmitted via antenna 101, performs down conversion of the received signal (received signal), etc., and continuously demodulates the baseband signal.
- a section 103, a packet data demodulation section 106, an instantaneous reception quality measurement section 109, a carrier reception quality measurement section 110, and a moving speed estimation section 803 of the carrier measurement control section 802 are output.
- Moving speed estimation section 803 estimates moving speed based on the baseband signal output from RF receiving section 801, and outputs the estimated moving speed to different carrier measurement suppressing section 804.
- a method of estimating the moving speed for example, a method of estimating a doppler frequency that increases in proportion to the moving speed from the magnitude of the phase rotation amount of the baseband signal and the change frequency of the reception level is known. It is.
- the different carrier measurement suppressing unit 804 is configured to allow the different carrier measurement only by permitting the different carrier measurement when the determination result indicating the pause of the packet is output from the packet continuation determining unit 121. Allow different carrier measurement even if it is faster than a certain threshold.
- Embodiments 1 to 6 the case where the communication terminal receives a packet transmitted from the base station has been described, but in Embodiment 7 of the present invention, when the communication terminal transmits a packet, the packet from the communication terminal The case where transmission is prioritized over different carrier measurement will be described.
- FIG. 10 is a block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 7 of the present invention.
- parts in FIG. 10 common to FIG. 2 will be assigned the same reference numerals as in FIG. 2 and detailed explanations thereof will be omitted.
- the packet data coding unit 901 codes transmission packet data with an error correction code or the like, and outputs a transmission packet data signal to the packet data modulation unit 902.
- the packet data modulation unit 902 modulates the transmission packet data signal output from the packet data coding unit 901 and outputs the modulation signal to the RF transmission / reception unit 903.
- the RF transmission / reception unit 903 performs transmission processing such as up-conversion on the modulated signal output from the packet data modulation unit 902, and transmits the modulation signal to the base station via the antenna 101.
- the RF transmission / reception unit 903 performs transmission / reception on the carrier based on the transmission carrier information output from the carrier switching control unit 113.
- frequency control can be shared between transmission and reception by linking the reception and transmission frequencies at certain intervals, leading to cost down. In this case, when receiving different carriers, transmission can not be performed on the carrier currently in communication. For this reason, the compressed mode described above also applies to transmission.
- the packet transmission control unit 904 controls the packet data coding unit 901 not to transmit a packet at the gap timing output from the different carrier reception timing setting unit 112. As a result, the packet data coding unit 901 does not transmit the packet until the next transmission opportunity, when it is controlled so as not to transmit the packet from the packet transmission control unit 904.
- Carrier measurement control circuit 905 determines whether the transmission of the packet is continuing or not, and Based on the judgment result, generate a signal that permits different carrier measurement (different carrier measurement permission signal). The generated different carrier measurement permission signal is output to the different carrier reception timing setting unit 112.
- the bucket continuation judging unit 911 judges whether or not the packet transmission is continuing. This may be performed by actually observing transmission packet data to determine whether or not the power is continuing, or by receiving information on the packet data.
- the different carrier measurement suppressing unit 912 permits measurement of the different carriers. That is, when a packet is transmitted from the communication terminal, priority is given to packet transmission while transmission packets are continuing, and by performing a different carrier measurement when packet transmission enters a pause period, transmission packets can be transmitted. It is possible to perform differential calibration without losing throughput.
- the communication terminal when the communication terminal transmits a packet, priority is given to packet transmission of communication terminal power over different carrier measurement, and while different carrier measurement is suspended during packet transmission. Communication can be performed without reducing the throughput of packet communication.
- a first aspect of the present invention is a wireless communication apparatus which performs communication by switching a plurality of different carriers, and continues packet communication and determines whether or not to stop the packet. If it is determined that packet communication is continuing as the determination means, it is determined that packet communication is suspended by suppressing switching to another carrier that is the carrier power currently used for communication. And a carrier reception quality measurement unit configured to measure the reception quality of the different carrier for which switching is permitted by the suppression unit.
- the packet continuity determining means includes a bucket If packet communication is resumed within the first predetermined time, it is determined that packet communication is continuing, and if packet communication is not performed for the first predetermined time, packet communication is suspended. It is a wireless communication device that determines that!
- a third aspect of the present invention in the above aspect, is different from the above aspect, when the packet communication is performed continuously for a second predetermined time or longer longer than the first predetermined time. It is a wireless communication device that permits switching to carriers.
- the different carrier measurement can not be performed, but it is longer than the first predetermined time.
- packet communication is continuously performed for the second predetermined time or more, by permitting switching to the different carrier, it is possible to prevent the different carrier measurement from being disabled for a long time.
- a fourth aspect of the present invention is, in the above aspect, provided with continuous data communication determination means for determining whether or not continuous data communication is performed, and the suppression means performs continuous data communication to perform! / If it is determined that the packet communication is determined to be, it is a wireless communication device that permits switching to another carrier even if packet communication continues.
- the packet continuity determining means continues or pauses the packet communication based on packet pause information indicating that the communication partner power halts the transmitted packet communication.
- Wireless communication device to determine
- packet communication may be continued or paused.
- the sixth aspect of the present invention in the above aspect, includes transmission rate acquisition means for acquiring a transmission rate of packet communication, and the suppression means has a case where the transmission rate is lower than a predetermined value V, It is a wireless communication device that permits switching to another carrier even if packet communication continues.
- a seventh aspect of the present invention in the above aspect, comprises packet quality measurement means for measuring packet quality which is reception quality of received packets, and the suppression means has a predetermined bucket quality. It is a wireless communication device that permits switching to another carrier even if packet communication continues if the quality is worse than the quality.
- the pause interval of the packet is shortened and the measurement of different carriers is not completed in the pause interval, so packet communication continues. Also, by permitting switching to different carriers, it is possible to prevent that different carriers can not be measured for a long time.
- the eighth aspect of the present invention in the above aspect, includes a movement speed estimation means for estimating the movement speed of the own apparatus, and the suppression means is configured to transmit the packet when the movement speed is larger than a predetermined value. It is a wireless communication device that permits switching to another carrier even if communication is continuing.
- a ninth aspect of the present invention is a wireless communication terminal apparatus comprising the wireless communication apparatus of the above aspect. According to this configuration, when packet communication is continued, the carrier key currently used for communication is also suppressed from switching to another carrier, and when packet communication is paused, By permitting switching to different carriers, packet communication is not interrupted, so different carriers can be measured without reducing throughput.
- a tenth aspect of the present invention is a wireless communication method in which communication is performed by switching a plurality of different carriers, and continues packet communication and determines whether or not to continue packet determination. If it is determined that the process and the packet communication are continued, it is determined that the carrier power currently used for communication is suppressed from switching to another carrier which is another carrier, and the packet communication is suspended.
- a wireless communication method comprising: a suppression step of permitting switching to a different carrier; and a carrier reception quality measuring step of measuring reception quality of the different carrier for which switching is permitted by the suppression step.
- the wireless communication apparatus and the wireless communication method according to the present invention have an effect of performing different carrier measurement without interrupting packet communication and avoiding a decrease in throughput, for example, a wireless communication terminal apparatus in the CDMA system. It can be applied to
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20050745940 EP1755237A1 (en) | 2004-06-08 | 2005-06-01 | Radio communication device and radio communication method |
US10/574,599 US20070053323A1 (en) | 2004-06-08 | 2005-06-01 | Wireless communication apparatus and wireless communication method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-170184 | 2004-06-08 | ||
JP2004170184A JP2005354196A (ja) | 2004-06-08 | 2004-06-08 | 無線通信装置及び無線通信方法 |
Publications (1)
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WO2005122432A1 true WO2005122432A1 (ja) | 2005-12-22 |
Family
ID=35503445
Family Applications (1)
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PCT/JP2005/010042 WO2005122432A1 (ja) | 2004-06-08 | 2005-06-01 | 無線通信装置及び無線通信方法 |
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US (1) | US20070053323A1 (ja) |
EP (1) | EP1755237A1 (ja) |
JP (1) | JP2005354196A (ja) |
CN (1) | CN1965506A (ja) |
WO (1) | WO2005122432A1 (ja) |
Cited By (4)
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WO2007077847A1 (ja) * | 2005-12-28 | 2007-07-12 | Ntt Docomo, Inc. | 移動局装置および基地局装置並びに周辺セル測定制御方法 |
CN100433931C (zh) * | 2006-02-10 | 2008-11-12 | 华为技术有限公司 | 在小区切换过程中提高分组数据单元传输效率的方法 |
JP2012517194A (ja) * | 2009-02-03 | 2012-07-26 | クゥアルコム・インコーポレイテッド | 移動体デバイスによる、無線カバレッジ関連情報の地理ベースの測定およびログ記録 |
JP2016122998A (ja) * | 2014-12-25 | 2016-07-07 | 日本電気株式会社 | 無線通信端末およびその制御方法 |
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GB2434714A (en) * | 2006-01-26 | 2007-08-01 | Nec Technologies | Inter-frequency measurement |
ES2324736T3 (es) | 2006-03-28 | 2009-08-13 | Samsung Electronics Co., Ltd. | Metodo y aparato para la recepcion discontinua de un terminal conectado en un sistema de comunicacion movil. |
US9036607B2 (en) | 2006-05-23 | 2015-05-19 | Sharp Kabushiki Kaisha | Method, mobile station device, base station device, and mobile communication system for gap-generation determination |
US7706341B2 (en) * | 2006-08-02 | 2010-04-27 | Avaya Inc. | Accounting for telecommunications terminal mobility in call admission control |
WO2008072294A1 (ja) * | 2006-12-08 | 2008-06-19 | Panasonic Corporation | 無線端末装置および無線基地局装置 |
WO2010032675A1 (ja) | 2008-09-22 | 2010-03-25 | シャープ株式会社 | 基地局装置、移動局装置、移動通信システムおよび通信方法 |
WO2010096968A1 (zh) * | 2009-02-27 | 2010-09-02 | 华为技术有限公司 | 压缩模式参数的配置及测量方法、装置、系统 |
JP6259727B2 (ja) * | 2014-06-30 | 2018-01-10 | 株式会社Nttドコモ | 基地局および移動通信システム |
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- 2005-06-01 WO PCT/JP2005/010042 patent/WO2005122432A1/ja not_active Application Discontinuation
- 2005-06-01 CN CNA2005800187197A patent/CN1965506A/zh active Pending
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JP2012517194A (ja) * | 2009-02-03 | 2012-07-26 | クゥアルコム・インコーポレイテッド | 移動体デバイスによる、無線カバレッジ関連情報の地理ベースの測定およびログ記録 |
JP2016122998A (ja) * | 2014-12-25 | 2016-07-07 | 日本電気株式会社 | 無線通信端末およびその制御方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1755237A1 (en) | 2007-02-21 |
US20070053323A1 (en) | 2007-03-08 |
CN1965506A (zh) | 2007-05-16 |
JP2005354196A (ja) | 2005-12-22 |
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