JP2011071799A - Radio communication system, radio base station, radio terminal, and radio communication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve utilization efficiency of radio resources by avoiding or reducing generation of excess resources in the radio resources for data transmission addressed to a receiving station. <P>SOLUTION: A transmitting station associates a first radio resource corresponding to a first time zone and a second radio resource corresponding to a second time zone after the first time zone as the resource for transmitting data addressed to at least one receiving station, with at least one receiving station and further performs transmission of first data which is the one which can be transmitted in the first time zone using at least either of the first radio resource or the second radio resource associated with the receiving station. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a base station, a terminal, a communication system, and a communication method, and more particularly to a radio communication system and a radio base station apparatus and a radio terminal apparatus constituting the radio communication system.

  Various voice coding methods have been studied for voice communication in digital communication. For example, as disclosed in Non-Patent Document 1, 3GPP, which is a standardization organization for cellular communication systems, standardizes AMR (Adaptive Multi Rate) and the like. Further, as disclosed in Non-Patent Document 2, EVRC (Enhanced Variable Rate Codec) and the like are standardized in 3GPP2, which is also a standardization organization for cellular communication systems. Here, the speech coder (vocoder) samples the input speech signal, performs a process such as quantization, and outputs the speech frame. For example, in the above-described speech coding schemes such as AMR and EVRC, speech frames are output at a constant cycle.

  On the other hand, a packet switching network uses communication resources only during packet transmission, unlike a circuit switching network that occupies a line and performs communication. Therefore, in order to transmit the above-described voice frame through the packet switching network, it is necessary to secure communication resources in advance. Therefore, as disclosed in Non-Patent Documents 3 to 5, in the standardization organization 3GPP, OFDMA (Orthogonal Frequency Division Access) is adopted as E-UTRA (Evolved Universal Terrestrial Radio Access) as OFDMA (Orthogonal Frequency Division Access). A function of reserving a certain amount of communication resources at a certain period is defined as SPS (Semi-Persistent Scheduling). In addition, as disclosed in Non-Patent Documents 6 to 11, in the standardization organization 3GPP2, a radio access interface that adopts OFDMA as UMB (Ultra Mobile Broadband) is standardized, and a constant mode has a constant amount as a persistent mode. A function for reserving communication resources is defined. In cellular communication systems such as E-UTRA and UMB, a base station allocates communication resources to a terminal for each packet or HARQ (Hybrid Automatic Repeat Request) transmission (subpacket), and communication resource allocation information is used as control information from the base station to the terminal. Notify Here, in SPS and Persistent Mode, the base station reserves periodic communication resources at the start of packet transmission, notifies the terminal of information on the reserved communication resources, and reserves in advance for subsequent packet transmissions. Use communication resources according to the period.

3GPP TS 26.071 V8.0.0 3GPP2 C.I. S0014-B v1.0 3GPP TS 36.321 V8.4.0 5.3.1 DL Assignment reception 3GPP TS 36.321 V8.4.0 5.4.1 UL Grant reception 3GPP TS 36.321 V8.4.0 5.10 Semi-Persistent Scheduling 3GPP2 C.I. S0084-002-0 Version 3.0 6.5.5.1.1.3 Access Terminal Assignment Management for Persistent Assignments 3GPP2 C.I. S0084-002-0 Version 3.0 6.5.5.1.2.1 Access Terminal Assignment Processing for Persistent Assignments 3GPP2 C.I. S0084-002-0 Version 3.0 6.5.5.2.2 F-DCH Transmissions Associated with Persistent Assignments 3GPP2 C.I. S0084-002-0 Version 3.0 8.55.5.1.3 Access Terminal Assignment Management for Persistent Assignments 3GPP2 C.I. S0084-002-0 Version 3.0 8.55.5.1.6 Access Terminal Transmission Logic for Persistent Assignments 3GPP2 C.I. S0084-002-0 Version 3.0 8.5.5.2 Access Network Requirements for Persistent Assignments

If a function for preserving communication resources is used, it is difficult to change the amount of resources and the frequency of resource allocation from moment to moment according to changes in the amount of data to be transmitted. For example, in SPS in E-UTRA and Persistent Mode in UMB, a communication resource of a certain size is reserved at a certain time period.
However, in multi-rate speech coding schemes such as AMR and EVRC, for example, the speech rate is variable according to the speech input to the speech coder, so the size, that is, the bit amount, differs for each speech frame.

  When transmitting traffic with a variable data size using a function for reserving a communication resource of a predetermined size, the communication resource is reserved according to the maximum data size that can be generated. There is a need. At this time, for example, when a certain amount of communication resource is reserved, such as SPS or Persistent Mode, when the data having the maximum data size is transmitted, the amount of the reserved communication resource matches the data size. However, when transmitting data having other data sizes, the amount of communication resources becomes larger than the data size, and surplus resources are generated. In this case, the surplus resource is complemented by stuffing data having no particular meaning such as zero padding, and data is transmitted using the reserved communication resource.

  When such surplus resources occur, supplementation of surplus resources with non-significant data frequently occurs, or when the amount of non-significant data is particularly large, it is particularly meaningful to account for the total amount of data transmitted. The proportion of data that does not exist increases, and the utilization efficiency of radio resources decreases.

  As an aspect of the present invention for solving at least one of the above-described problems, the transmitting station is a first resource corresponding to the first time zone as a resource for transmitting data destined for at least one receiving station. And the second radio resource corresponding to the second time zone after the first time zone is associated with the at least one receiving station, and further associated with the receiving station. In addition, the first data which is data that can be transmitted in the first time zone is transmitted using at least one of the first radio resource and the second radio resource.

  Furthermore, as another aspect, when the first data is transmitted using the second radio resource, the first data is transmitted together with data other than the first data. The configuration is as follows.

  According to one aspect of the present invention, it is possible to avoid or reduce the generation of surplus resources in radio resources for data transmission to a receiving station, and to improve the utilization efficiency of radio resources.

Configuration diagram of cellular radio communication system Diagram showing resource definition Diagram showing definition of SPS resource Diagram showing reserved resources Sequence diagram showing data communication procedure by SPS Flow chart showing the procedure for determining whether the base station delays data transmission based on the presence or absence of padding Flow chart showing a procedure for determining whether a base station performs data transmission delay based on the presence or absence of padding and the amount of delay Flow chart showing a procedure for determining whether a base station performs data transmission delay or data transmission using another resource based on the presence / absence of padding and the amount of delay The figure explaining the data transmission in a SPS resource Diagram explaining data transmission when data transmission is delayed A flow diagram showing a procedure for determining whether a base station releases resources based on the occurrence of free resources Flow chart showing a procedure for determining whether a base station allocates free resources to terminals based on the occurrence of free resources The figure explaining the data transmission in a SPS resource The figure explaining the data transmission of a base station in case a some terminal shares a series of SPS resources. Sequence diagram showing a procedure for data communication of a base station when a plurality of terminals share a series of SPS resources A flow diagram showing a procedure for determining a base station that starts sharing a series of SPS resources by a plurality of terminals based on the generation of free resources A flow chart showing a procedure for determining a base station that starts sharing a series of SPS resources by a plurality of terminals based on the amount of padding A flow diagram showing a procedure for determining a base station that starts sharing a series of SPS resources by a plurality of terminals based on past data transmission conditions Flow chart showing the operation procedure of a base station that changes the number of terminals and a combination of terminals that share a series of SPS resources Diagram showing audio data transmission using SPS resources The figure which shows delaying data transmission in audio | voice data transmission Flow chart showing the procedure for the base station to determine the postponement of data transmission based on the amount of padding Flow chart showing the procedure for the base station to determine the postponement of data transmission based on the frequency of padding Flow chart showing a procedure of data transmission of a base station when a plurality of terminals share a series of SPS resources The figure which shows an example of the allocation SPS resource management table The figure which shows the structural example of a base station Diagram showing an example of terminal configuration Flow chart showing operation procedure of terminal data reception

  A communication system to which the present invention is applied, and a base station and a terminal in the communication system will be described in detail with reference to the drawings, taking SPS in E-UTRA as an example. However, it is obvious that the embodiment of the present invention is not limited to SPS as long as resources for data transmission / reception are reserved in advance for data transmission to the terminal.

  A first embodiment to which the present invention is applied will be described below. FIG. 1 shows a configuration example of a wireless communication system that employs E-UTRA. As shown in FIG. 1, the wireless communication system includes a plurality of base stations and a plurality of terminals. The base stations 101a to 101c are connected to the base station control apparatus 103 via a wired line, and the base station control apparatus 103 is further connected to the network 104 via a wired line. The terminal 102 a is connected to the base station 101 a, the terminal 102 b is connected to the base station 101 b, and the terminal 102 c is connected to the base station 101 c by radio, and can communicate with the network 104 via the base station controller 103. In the system of FIG. 1, the base stations 101a to 101c allocate communication resources and notify the terminals 102a to 102c connecting the allocation information. The cells 105a to 105c indicate the approximate range in which the connected terminals 102a to 102c can communicate by wireless connection with the respective base stations 101a to 101c. In the following description, the base station refers to at least one of the base stations 101a to 101c of the cells 105a to 105c, and the terminal refers to at least one of the terminals 102a to 102c. And

  FIG. 26 shows a configuration example of a base station for carrying out the present invention. The network interface 2605 receives data from the network and transmits the data to a DSP (Digital Signal Processor) 2604. The DSP 2604 stores data received from the network interface in an RLC (Radio Link Control) buffer 2609. The MPU 2606 serving as the control unit allocates radio resources and instructs the DSP 2604 to transmit data packets using the radio resources allocated by the MPU 2606. The radio resource allocation information determined by the MPU 2606 is stored in the memory 2607. The DSP 2604 takes out data from the RLC buffer according to an instruction from the MPU 2604 and transmits the data to the baseband unit 2603 as a physical packet. The baseband unit 2603 performs signal processing such as encoding and modulation on the physical packet received from the DSP 2604 in accordance with an instruction from the MPU 2604. The codeword generated from the physical packet by the baseband unit 2603 is held in the HARQ buffer 2608 until the physical packet transmission is completed. The digital signal generated by the baseband unit 2603 is converted into an analog signal by the RF unit 2602, up-converted to a radio frequency transmission frequency band assigned by the MPU 2606, amplified to an appropriate transmission power, and then transmitted from the antenna 2601. Is done. In the configuration example of FIG. 26, the antenna 2601 is configured as hardware. Also, the baseband unit 2603, DSP 2604, network interface 2605, memory 2607, HARQ buffer 2608, RLC buffer 2609, MPU 2606, and RF unit 2602 may all be configured by hardware, or the baseband unit 2603, DSP 2604, network interface 2605, HARQ buffer 2608, RLC buffer 2609, MPU 2606, and RF unit 2602 may be executed as program modules stored in the memory 2607.

  FIG. 27 shows a configuration example of a terminal for carrying out the present invention. The antenna 2701 receives a radio signal from the base station. For the received signal, the RF unit 2702 performs processing such as down-conversion to a baseband signal and conversion from an analog signal to a digital signal. Thereafter, the baseband unit 2703 performs processing such as demodulation and decoding, and the obtained physical packet from the base station is sent to the DSP 2704. The demodulation result of the baseband unit 2703 is held in the HARQ buffer 2708 until decoding is successful. The MPU 2706 extracts resource allocation information notified from the base station from the DSP 2704 and stores it in the memory 2707. The resource allocation information is used when the baseband unit 2703 performs demodulation and decoding. Data processed by the DSP 2704 is temporarily stored in the RLC buffer 2709 and then transmitted to the application interface 2705. In the configuration example of FIG. 27, the antenna 2701 is configured as hardware. In addition, the baseband unit 2703, DSP 2704, application interface 2705, memory 2707, HARQ buffer 2708, RLC buffer 2709, MPU 2706, and RF unit 2702 may all be configured by hardware, or the baseband unit 2703, DSP 2704, application interface 2705, HARQ buffer 2708, RLC buffer 2709, MPU 2706, and RF unit 2702 may be executed as program modules stored in memory 2707.

  FIG. 2 shows an example of assignment of communication resources used for communication between the base stations 101a to 101c and the terminals 102a to 102c. As shown in FIG. 2, the communication resource 201 is defined by a frequency band 203 and a time slot 202. In E-UTRA, a unit time slot in communication resource allocation is called a subframe. In E-UTRA, a time frequency resource composed of a certain frequency bandwidth and subframe in communication resource allocation is called a resource block. In the following description, a resource block is abbreviated as RB.

  Allocation of communication resources in E-UTRA is performed by either DS (Dynamic Scheduling) or SPS. Notification of communication resource allocation information from the base station to the terminal in E-UTRA is performed for each HARQ transmission in the downlink and for each packet in the uplink. This method is called DS (Dynamic Scheduling). On the other hand, in SPS, communication resources used for the first HARQ transmission of each packet can be periodically reserved in advance. In this embodiment, communication resources secured by SPS are defined as SPS resources.

  FIG. 3 shows an example of assignment of SPS resources 300 that are communication resources in SPS in E-UTRA. As shown in FIG. 3, in SPS in E-UTRA, the communication resource 300 is reserved with a constant frequency bandwidth on a constant frequency in an SPS period 301 which is a constant time period. On the other hand, FIG. 4 shows an allocation example of the resource group 400 at a non-constant time interval and a non-constant frequency bandwidth on a non-constant frequency. As shown in FIG. 4, even if the communication resource is reserved with a non-constant time interval and a non-constant frequency bandwidth on a non-constant frequency, the present invention is applied as long as the communication resource is reserved in advance. Obviously it is possible.

  A data transmission procedure using SPS in E-UTRA will be described with reference to FIG. 5, taking data transmission in the downlink from the base station to the terminal as an example. FIG. 5 is a sequence diagram showing a data transmission procedure using SPS. First, in sequence 501, the base station assigns an ID called RNTI (Radio Network Temporary Identifier) to the terminal. The base station uses the assigned RNTI for scramble processing when data transmission is performed by SPS. Here, the data to be transmitted is scrambled with the RNTI assigned to the terminal in advance, so that only the terminal assigned with the RNTI can decode the data. Further, in sequence 502, the base station notifies the terminal of SPS time period information. When data transmission is performed using the SPS resource, the base station notifies the terminal of the start of use of the SPS resource in sequence 503. At this time, the information notified in sequence 503 is scrambled by the RNTI assigned to the terminal. The information notified in the sequence 503 includes information such as the frequency and modulation scheme of resources secured by the SPS.

  Information such as the time period of the SPS resource notified to the terminal in sequence 502, the frequency of the SPS resource notified to the terminal in sequence 503, that is, the index of RB, and the encoding / modulation method, that is, MCS (Modulation and Coding Scheme), In the base station, it is determined by the MPU 2606 and held in the allocated SPS resource management table 2500 as shown in FIG. In the allocated SPS resource management table 2500, an RB index 2502 that is an allocated RB index, an MCS index 2503 that is an MCS index, an allocated resource size 2504, a time period 2505 of an SPS resource, and an offset 2506 are the ID 2501 of each terminal. Is associated with. The resource size 2504 in the allocated SPS resource management table 2500 is the size of the physical packet transmitted by the SPS resource, and is determined from the allocated frequency bandwidth and MCS. The offset 2506 in the table of FIG. 25 is a time offset of the SPS resource for the base station to manage the SPS timing, that is, a time frame (subframe) for starting the SPS, and is determined by the timing at which the notification of the sequence 503 is performed. Is done. Note that the allocated SPS resource management table 2500 as described with reference to FIG. 25 is included in the information notified in the sequence 503, and is held in the memory 2707 of the terminal as resource allocation information. Here, the terminal may be configured to hold the timing of the sequence 503 in the memory 2707 as information indicating the offset 2506.

  At the same time or after notification of the start of use of the SPS resource in sequence 503, data is transmitted from the base station to the terminal using the SPS resource in sequence 504. At this time, the data transmitted in sequence 504 is scrambled by the RNTI assigned to the terminal. The terminal decodes the data received in sequence 504 using the SPS resource information notified in sequence 502 and sequence 503. As a decoding result, the terminal notifies the base station of ACK (Acknowledgement) when the decoding is successful, and NACK (Negative Acknowledgment) when the decoding fails. In the example of FIG. 5, the decoding has succeeded, and the ACK is notified from the terminal to the base station in sequence 505. Subsequent data is transmitted according to the time period set in sequence 502.

  In the sequence 506 in FIG. 5, subsequent data is transmitted using the SPS resource. In the example of FIG. 5, decoding of the data transmitted in sequence 506 fails, and NACK is notified from the terminal to the base station as a decoding result in sequence 507. The base station that has received the NACK retransmits data based on HARQ. Data retransmission by HARQ is performed using DS resources. In sequence 508, the base station notifies the terminal of DS resource allocation information, and at the same time, retransmits the data transmitted in sequence 506 using the DS resource. The terminal attempts to decode the data received in sequence 506 and sequence 508. In the example of FIG. 5, decoding is successful, and ACK is notified from the terminal to the base station as a decoding result in sequence 509.

  In the present embodiment, the base station determines whether to postpone data transmission before performing data transmission using the SPS resource in the sequence 504 and the sequence 506 in FIG. This determination is made based on the presence / absence of occurrence of padding, the amount of occurrence, the frequency of occurrence, etc., which are complementary to meaningless data for the SPS resource. Here, the amount of padding generated is the amount of padding bits inserted into one physical packet, and the frequency of padding generation refers to the temporal frequency of occurrence of a physical packet to be padded. Also, as an example of padding, there is zero padding in which the base station generates data with all values being 0, and the base station supplements the SPS resource with the data as meaningless data. Further, as an example of complementation, in FIG. 26, the DSP 2604 adds meaningless data when transmitting data to the baseband unit 2603 as a physical packet.

  FIG. 6 is a flowchart showing an example of a procedure for determining whether to postpone data transmission based on the presence or absence of padding in the MPU 2606 of the base station. The flow in FIG. 6 is performed in the MPU 2606 of the base station prior to the time when there is an SPS resource reserved for a certain terminal, that is, prior to the sequence 504 in FIG. The determination method will be described with reference to FIG. First, the base station refers to the period and offset in the table of FIG. 25 and checks whether there is user data to be transmitted to the terminal to which the SPS resource is allocated using the SPS resource (601). If there is no user data to be transmitted, the data is not transmitted using the SPS resource (605), and the process is terminated. If there is user data to be transmitted, the size of the user data is compared with the size of the resource in the table of FIG. 25, and the base station confirms the presence or absence of padding (602). If padding occurs, it is determined that transmission of user data to be transmitted to the terminal to which the SPS resource is allocated is performed using an SPS resource in a time slot after the SPS resource, and data transmission is delayed. (604) The process is terminated. At this time, the data whose transmission has been postponed is stored in the RLC buffer 2609 of FIG. If no padding occurs, data transmission is performed using the SPS resource (603), and the process ends. In this embodiment, when the SPS resource is in a state in which data transmission is not performed to a terminal that is a reservation target of the SPS resource, the SPS resource in this state is referred to as a free resource.

  FIG. 22 is a flowchart illustrating an example of a procedure for determining whether to postpone data transmission based on the amount of padding in the MPU 2606 of the base station. The determination method will be described with reference to FIG. First, in step 2201, the base station confirms whether there is user data to be transmitted to the terminal to which the SPS resource is allocated with the SPS resource. If there is no user data to be transmitted, the process proceeds to step 2202, and the process is terminated without transmitting data using the SPS resource. If there is user data to be transmitted, the process proceeds to step 2203, and the base station checks the amount of padding. If the amount of padding exceeds a predetermined threshold, the process proceeds to step 2204 to transmit user data to be transmitted to the terminal to which the SPS resource is allocated, and to change the SPS resource in the time slot after the SPS resource. By using this, data transmission is delayed and the process is terminated. If the generated amount of padding is less than the predetermined threshold value, the process proceeds to step 2205, data transmission is performed using the SPS resource, and the process ends.

  FIG. 23 is a flowchart illustrating an example of a procedure for determining whether to postpone data transmission according to the frequency of padding in the MPU 2606 of the base station. The determination method will be described with reference to FIG. First, in step 2301, the base station confirms whether there is user data to be transmitted to the terminal to which the SPS resource is allocated with the SPS resource. If there is no user data to be transmitted, the process proceeds to step 2302, and the process ends without transmitting data using the SPS resource. When there is user data to be transmitted, the process proceeds to step 2303, and the base station checks the frequency of occurrence of padding. If the occurrence frequency of padding exceeds a predetermined threshold, the process proceeds to step 2304 to transmit user data to be transmitted to the terminal to which the SPS resource is allocated, and to change the SPS resource in the time slot after the SPS resource. By using this, data transmission is delayed and the process is terminated. If the occurrence frequency of padding is less than the predetermined threshold value, the process proceeds to step 2305, data transmission is performed using the SPS resource, and the process ends.

  When the traffic is highly immediate, such as a voice call or video streaming, the service quality deteriorates as the data transmission delay increases. In order to prevent this, the amount of delay in data transmission may be limited. For example, in the case of a voice call, the maximum delay amount may be determined within a range allowed by a buffer for absorbing delay jitter in voice decoding on the receiving side.

  The operation when the delay amount is limited will be described with reference to FIGS. 7 and 8 show an example in which the base station determines whether to postpone data transmission based on the presence / absence of padding, but does the occurrence frequency of padding exceed the threshold in the determination flow of 703 and 802? Whether or not to postpone data transmission may be determined based on whether or not the generation amount of padding exceeds a threshold value. In FIGS. 7 and 8, the determination of whether or not the delay amount exceeds the maximum delay amount may be made based on the elapsed time from the occurrence of traffic such as a voice frame, or the postponement of data transmission. You may perform based on the frequency | count of having performed.

  FIG. 7 is a flowchart illustrating a procedure in which the MPU 2606 of the base station performs data transmission using the SPS resource regardless of whether or not padding has occurred when the delay amount exceeds the maximum delay amount. If there is user data to be transmitted to the terminal to which the SPS resource is allocated in step 701, the base station checks whether or not the maximum delay amount is exceeded (702). If the maximum delay amount is exceeded, data transmission is performed using the SPS resource (704). If the maximum delay amount is not exceeded, the base station confirms whether or not padding has occurred (703), and determines whether to transmit data using the SPS resource or to delay transmission depending on the presence or absence of padding.

  FIG. 8 is a flowchart showing a procedure in which the MPU 2606 of the base station separately secures resources in the same time slot as the SPS resource and performs data transmission when the delay amount exceeds the maximum delay amount. In step 801, when there is user data to be transmitted to the terminal to which the SPS resource is allocated, the base station confirms whether or not padding has occurred (802). Depending on whether or not padding has occurred, the base station uses the SPS resource. Decide whether to send data. If the base station determines that data transmission is not performed using the SPS resource due to padding, the base station checks whether the maximum delay amount is exceeded (804). If the maximum delay amount is exceeded, data transmission is performed using another resource having the same time slot as the SPS resource (806). Another resource can be secured by the DS method. If the maximum delay amount is not exceeded, the base station postpones data transmission (805).

  It will be described with reference to FIGS. 9 and 10 that the wireless utilization efficiency is improved by delaying data transmission as described above. FIG. 9 is a diagram illustrating a state of data transmission in the SPS resource when the present invention is not applied. In FIG. 9, user data 1 (903) is transmitted by the first SPS resource A901, and user data 2 (906) is transmitted by the next SPS resource B904. In either SPS resource, since the size of the user data is less than the size of the SPS resource, complementation is performed by padding. On the other hand, FIG. 10 is a diagram illustrating an example of a state of data transmission in the SPS resource when data transmission is delayed according to the present invention. When user data 1 (1006) is transmitted using the first SPS resource 1001, padding occurs. Therefore, in the flow described with reference to FIG. 6, for example, as shown in FIG. Judge to delay until. In FIG. 10, user data 1 (1005) and user data 2 (1006) are transmitted together in the next SPS resource 1003, and the amount of padding is reduced compared to FIG. For example, when priority is set for user data, data with high priority may be transmitted to the terminal first. Further, for example, when the user data reception order needs to be the order held by the base station in order for the terminal side to decode the user data, the user data 1 may be transmitted prior to the user data 2 first. . In this way, by delaying data transmission according to the present embodiment, it is possible to reduce complementation (padding) with meaningless data by avoiding or reducing the generation of surplus resources not used for user data transmission. Thus, wireless utilization efficiency can be improved.

  FIG. 28 is a flowchart showing an example of a data reception procedure in the terminal. The flow of FIG. 28 is performed based on the resource allocation information after the terminal acquires (503) resource allocation information that may be transmitted from the base station in the subframe in the sequence of FIG. . First, in step 2801, the terminal confirms whether there is any resource allocation by the DS method in the subframe for the terminal. If there is resource allocation by the DS method, data reception processing is performed on the allocated resource (2803). If there is no resource allocation by the DS method, in Step 2802, it is confirmed whether or not the SPS resource reserved for the terminal exists in the subframe. If there is no reserved SPS resource, it is determined that there is no data to be received in the subframe, and the process ends. On the other hand, if there is a reserved SPS resource, data reception processing is performed on the reserved resource (2803). After performing the data reception process in step 2803, the decoding result is determined (2804). If the decoding fails, the terminal notifies the NAK response to the base station (2805). If the decoding is successful, the terminal notifies the base station of an ACK response (2806).

  In the following, other embodiments of a communication system to which the present invention is applied, and a radio base station and a radio terminal in the radio system will be described. In the above-described embodiment, the configuration example of the wireless communication system, the base station, and the terminal, the processing example performed by the base station and the terminal, the features regarding each resource and each data, etc. The same applies to each embodiment.

  A second embodiment to which the present invention is applied will be described with reference to FIGS. In this embodiment, when a free resource occurs, the SPS resource is released. Here, in this embodiment, the release of the SPS resource means that the base station determines that the SPS resource is not used for data transmission to the terminal for which the SPS resource is reserved.

  As shown in FIG. 11, when a free resource is generated in step 1101, the base station releases the SPS resource (1102) and ends the determination. If no free resource is generated, the determination is terminated as it is. The released resources may be used for data transmission to other terminals. FIG. 12 is a flowchart illustrating an example of a procedure in which the base station allocates the released resources to other terminals and transmits data. In FIG. 12, if no free resource is generated in step 1201, the process is terminated. On the other hand, when a free resource is generated in step 1201, the base station checks whether another terminal to which no SPS resource is allocated has user data to be transmitted (1202). When the other terminal has user data to be transmitted, the base station allocates a frequency band corresponding to the released resource, that is, RB (Resource Block), to the other terminal by the DS method (1203). If another terminal does not have user data to be transmitted, the process ends. When releasing the SPS resource and transmitting data to another terminal, the other terminal is notified of resource allocation by the DS method (1204), and data is transmitted using the resource (1205). It is not always necessary to allocate free resources to other terminals. When there is data to be transmitted for another traffic to a terminal for which SPS resources have been released, the release of SPS resources is stopped, It may be used to transmit traffic data. In this case, there is no need to newly notify resource allocation. 11 and 12 is performed by the MPU 2606 of the base station.

  As described above, it is possible to avoid or reduce the occurrence of surplus resources in radio resources by using free resources for data transmission to other terminals or data transmission of other traffic of the same terminal. To improve resource utilization efficiency.

  In the third embodiment to which the present invention is applied, a series of SPS resources are shared by a plurality of terminals. Here, as described in FIG. 5, the series of SPS resources refers to a resource group including a plurality of SPS resources allocated to a certain terminal and allocated as a specific frequency bandwidth in a specific time period. .

  FIG. 13 is a diagram illustrating a state in which the base station performs data transmission to the terminal A and the terminal B using the SPS resource when the present embodiment is not applied. In FIG. 13, data transmission to each terminal is performed using a series of SPS resources reserved for each terminal. For example, for terminal A in FIG. 13, user data A1 (1303) is transmitted using the first SPS resource 1301 for terminal A, and user data A2 (1309) is transmitted using the SPS resource 1307 for the next terminal A. Yes. In either SPS resource, since the size of the user data is less than the size of the SPS resource, complementation is performed by padding. The same applies to terminal B.

  On the other hand, a state of data transmission when a series of SPS resources are shared by a plurality of terminals by applying this embodiment will be described with reference to FIG. FIG. 14 is a diagram illustrating an example of a state in which the base station performs data transmission to the terminal A and the terminal B using the SPS resource when the present embodiment is applied. In FIG. 14, in a series of SPS resources 1400 shared by terminal A and terminal B, the base station transmits data to both terminal A and terminal B. In the SPS resource m1411, the base station transmits user data A1 (1403) and user data A2 (1402) to the terminal A. In the next SPS resource n1412, the base station transmits user data B1 (1406) and user data B2 (1405) to the terminal B. For example, when the terminal A and the terminal B share the SPS resource, the data transmission to the terminal B is delayed in the subframe in which the data transmission to the terminal A is performed using the shared SPS resource. Alternatively, in a subframe in which data transmission to terminal B is performed using a shared SPS resource, data transmission to terminal A can be delayed. At this time, different RNTIs are applied to terminals sharing a series of SPS resources.

  The data transmission procedure in this embodiment is different from that described with reference to FIG. 5, and will be described with reference to FIG. In FIG. 15, it is assumed that terminal A and terminal B share a series of SPS resources as in FIG. First, in sequence 1501 and sequence 1502, the base station assigns a terminal-specific RNTI to each terminal. Further, in sequence 1503 and sequence 1504, the base station individually notifies each terminal of SPS time period information. At this time, it is desirable that the time periods notified to the terminal A and the terminal B are the same. Prior to data transmission using the SPS resource, the base station individually notifies each terminal of the start of use of the SPS resource in sequence 1505 and sequence 1506. At this time, it is desirable that the notification timing of the start of using the SPS resource is the same.

  Information notified in sequence 1505 and sequence 1506 is scrambled by the RNTI assigned to the terminal. The information notified in sequence 1505 and sequence 1506 includes information corresponding to the terminal in the allocated SPS resource management table 2500 as described with reference to FIG. When the notification of the start of use of the SPS resource is performed in sequence 1505 and sequence 1506, the base station transmits data to the terminal using the SPS resource at the same time or after the notification. In the example of FIG. 15, in sequence 1507, the base station transmits data to terminal A using the SPS resource. At this time, the data transmitted in sequence 1507 is scrambled by the RNTI assigned to terminal A. Therefore, at the time of data transmission, the transmission signal from the base station is received by either terminal, but since terminal B does not know the scramble code (RNTI of terminal A) included in this transmission signal, terminal B The data transmitted to the terminal A cannot be decoded. On the other hand, the terminal A can decode the data transmitted in the sequence 1507 using the RNTI assigned to the terminal A in advance.

  In the example of FIG. 15, terminal A succeeds in decoding the data transmitted in sequence 1507, and notifies base station of ACK as the decoding result in sequence 1508. Since terminal B fails to decode for the above-mentioned reason, it notifies NACK to the base station as a decoding result in sequence 1509. In the next SPS resource, in sequence 1510, the base station transmits data to terminal B using the SPS resource. At this time, the data transmitted in sequence 1510 is scrambled by the RNTI assigned to terminal B. For this reason, terminal A cannot decode data transmitted in sequence 1510, and notifies base station of NACK as a decoding result in sequence 1511. In the example of FIG. 15, terminal B succeeds in decoding the data transmitted in sequence 1510, and notifies base station of ACK as the decoding result in sequence 1512.

  By the way, in FIG. 15, the base station transmits data to terminal A in sequence 1507, and to terminal B in sequence 1510. Therefore, the base station knows in advance that the NACK notified in sequence 1509 and sequence 1511 is from a terminal that is not the destination of data. Therefore, the base station may ignore the NACK notified in sequence 1509 and sequence 1511.

FIG. 24 is an example illustrating an example of a data transmission procedure in the base station when a plurality of terminals share the same SPS resource. The processing in FIG. 24 is used when determining data to be transmitted in the subframe, and is performed prior to, for example, the sequence 1507 or the sequence 1510 in FIG. In FIG. 24, similarly to FIG. 15, it is assumed that terminal A and terminal B share a series of SPS resources. In FIG. 24, the base station first checks the presence / absence of data to be transmitted to terminal A (2901) and the presence / absence of data to be transmitted to terminal B (2902 and 2903). As a result, when there is data to be transmitted only to one of the terminals, data transmission is performed to the terminal having the data to be transmitted. That is, if it is determined Yes in step 2901 and No in step 2902, data is transmitted to terminal A in step 2905. Alternatively, if it is determined No in step 2901 and Yes in step 2903, data is transmitted to terminal B in step 2906. If there is no data to be transmitted to any terminal, data transmission is not performed (2907). When there is data to be transmitted to any terminal, it is determined to which terminal data transmission should be performed. In the example of FIG. 24, the determination is made based on the data size. In step 2904, if the size of data to be transmitted to terminal A is larger than the size of data to be transmitted to terminal B, data is transmitted to terminal A in step 2905. If the size of the data to be transmitted to terminal A is smaller than the size of the data to be transmitted to terminal B in step 2904, data is transmitted to terminal B in step 2906.
As described above, by sharing the same series of SPS resources among a plurality of terminals, it is possible to avoid or reduce the occurrence of surplus resources in the radio resources, and to improve the utilization efficiency of the radio resources.

  A fourth embodiment to which the present invention is applied will be described with reference to FIG. In this embodiment, sharing of a series of SPS resources by a plurality of terminals is started on the basis of the presence / absence of free resources, the generation amount, or the generation frequency. Here, as in the third embodiment, the series of SPS resources refers to a series of resource groups including a plurality of SPS resources allocated as a specific frequency bandwidth in a specific time period.

  FIG. 16 shows an example of a procedure in which the MPU 2606 of the base station determines whether to start sharing a series of SPS resources by a plurality of terminals on the basis of the availability of each terminal. In FIG. 16, the base station checks whether or not each terminal has free resources (1602), and counts the number a of terminals having free resources (1603). Then, the base station determines whether or not the number a of terminals having free resources is equal to or greater than a predetermined threshold (1604). If a is equal to or greater than a predetermined threshold, it is determined that there are enough free resources, and it is determined to start sharing a series of SPS resources among a plurality of terminals (1605). If a is less than a predetermined threshold, it is determined that there are insufficient free resources, and the process ends. Here, when a series of SPS resources are not shared by a plurality of terminals, the series of SPS resources are used for data transmission to a single terminal. An example of data transmission / reception between a plurality of terminals sharing a series of SPS resources and a base station in the present embodiment is as described in Embodiment 3 with reference to FIGS.

In the example of FIG. 16, the base station confirms whether or not there is a free resource for each terminal. Based on whether or not this is the case, the start of sharing a series of SPS resources may be determined.
As described above, by sharing the same series of SPS resources among a plurality of terminals so as to eliminate free resources, it becomes possible to avoid or reduce the occurrence of surplus resources in radio resources, and to use radio resources. To improve efficiency.

  A fifth embodiment to which the present invention is applied will be described with reference to FIG. In the present embodiment, sharing of a series of SPS resources by a plurality of terminals is started on the basis of presence / absence of complementation (padding) with meaningless data, generation amount, or generation frequency. Here, a series of SPS resources refers to a resource group including a plurality of SPS resources allocated as a specific frequency bandwidth in a specific time period, as in the third embodiment.

  FIG. 17 shows an example of a procedure in which the MPU 2606 of the base station determines whether to start sharing a series of SPS resources by a plurality of terminals based on the amount of padding generated by each terminal. In FIG. 17, the MPU 2606 of the base station confirms the amount of padding generated for each terminal (1702), and counts the number of terminals a whose amount of padding is equal to or greater than a predetermined amount threshold (1703). And 1704). Then, the MPU 2606 of the base station determines whether or not the number a of terminals in which the amount of padding that is greater than or equal to the generation amount threshold is greater than or equal to a predetermined number of terminals threshold (1705). Here, the amount of padding is determined by, for example, comparing the resource size 2504 with the data capacity. If the number a is equal to or greater than a predetermined threshold value for the number of terminals, it is determined that there is much complementation with meaningless data, and it is determined to start sharing a series of SPS resources among a plurality of terminals (1706). ). On the other hand, if the number a is less than a predetermined threshold value for the number of terminals, the process is terminated without starting sharing a series of SPS resources among a plurality of terminals. Here, when a series of SPS resources are not shared by a plurality of terminals, the series of SPS resources are used for data transmission to a single terminal. An example of data transmission / reception between a plurality of terminals sharing a series of SPS resources and a base station in the present embodiment is as described in Embodiment 3 with reference to FIGS.

In the example of FIG. 17, the base station confirms the amount of padding for each terminal. The start of sharing the SPS resources may be determined.
As described above, by sharing the same series of SPS resources among a plurality of terminals so as to suppress padding, it is possible to avoid or reduce the occurrence of surplus resources in radio resources, and to improve the efficiency of radio resource utilization. For improvement.

  A sixth example to which the above embodiment of the present invention is applied will be described with reference to FIG. In this embodiment, sharing of a series of SPS resources by a plurality of terminals is started based on the past data transmission status. Here, as in the third embodiment, the series of SPS resources refers to a series of resource groups including a plurality of SPS resources allocated as a specific frequency bandwidth in a specific time period.

  FIG. 18 illustrates an example of a procedure in which the MPU 2606 of the base station determines whether to start sharing a series of SPS resources by a plurality of terminals based on the past data transmission status for each terminal. In FIG. 18, the MPU 2606 of the base station confirms whether or not data has been transmitted to each terminal during the past time n (1802), and the terminal that has not transmitted data during the past time n. Is counted (1803). For example, every time MPU 2606 determines that data is not transmitted as in 2202 in FIG. 22, the count number is added to and held in memory 2607, and MPU 2606 confirms the count number during past time n in 1802. It is good. If the number a of terminals that have not transmitted data during the past time n is equal to or greater than a predetermined threshold (Yes in 1804), the base station transmits to the resource group secured by SPS. It is determined that the amount of user data to be reduced is small, and it is determined to start sharing a series of SPS resources among a plurality of terminals (1805). Here, during the past time n means a period from the time of step 1802 to a time point that is back by time n. Time n is preset in the base station. An example of data transmission / reception between a plurality of terminals sharing a series of SPS resources and a base station in the present embodiment is as described in Embodiment 3 with reference to FIGS.

  In the example of FIG. 18, the base station confirms the past data transmission status for each terminal, but the series of SPS resources in the series of SPS resources used by a specific terminal is used as a reference. You may decide to start sharing.

In speech coding schemes such as AMR, the amount of data and the frequency of speech frame generation in a silent section are smaller than those in a speech section. Therefore, in the present embodiment, when transmitting audio data, a series of SPS resources may be shared by terminals that are silent sections.
As described above, when the amount of data to be transmitted is small, by sharing the same series of SPS resources among a plurality of terminals, it becomes possible to avoid or reduce the occurrence of surplus resources in the radio resources, To improve resource utilization efficiency.

In the seventh embodiment to which the present invention is applied, the number of terminals and the combination of terminals are dynamically changed in the configuration sharing a series of SPS resources as described in the third to sixth embodiments. And
FIG. 19 shows that when a series of SPS resources are shared by a plurality of terminals, the MPU 2606 of the base station increases or decreases the number of terminals sharing the series of SPS resources on the basis of the occurrence of free resources or resource shortage. An example of the procedure is shown. In FIG. 19, the base station first checks whether or not free resources are generated in a series of SPS resources shared by a plurality of terminals (1901). When free resources are generated, the base station determines that the SPS resources are sufficient, and increases the number of terminals sharing a series of SPS resources (1902). If no free resource is generated, the base station checks whether a shortage of resources occurs with respect to the amount of data to be transmitted in a series of SPS resources shared by a plurality of terminals (1903). When resource shortage occurs, the base station determines that the SPS resource has no room for the number of terminals, and decreases the number of terminals sharing a series of SPS resources (1904).

  In the example of FIG. 19, the number of terminals is changed based on the presence / absence of free resources and resource shortage, but the data transmission status, padding occurrence status, and traffic occurrence status may be used as a reference. For example, in a speech coding scheme such as AMR, the amount of data and the frequency of speech frame generation in a silent section are smaller than those in a speech section. Therefore, in the present embodiment, when transmitting voice data, the number and combination of terminals sharing a series of SPS resources may be changed based on whether the terminal is a silent section or a voiced section.

An example of data transmission / reception between a plurality of terminals sharing a series of SPS resources and a base station in the present embodiment is as described in Embodiment 3 with reference to FIGS. However, in a configuration in which a series of SPS resources are shared, when changing the number of terminals or the combination of terminals and the SPS resources allocated to the terminals need to be changed, the base station updates the SPS resources. Notify For updating the SPS resource, for example, when changing the time offset or frequency resource of the SPS resource, the same method as the sequence 1505 or the sequence 1506 in FIG. 15 may be used, or the time period of the SPS resource is changed. In this case, a method similar to the sequence 1503 or the sequence 1504 in FIG. 15 may be used. At this time, the terminal reflects the updated content of the SPS resource notified in 1503 to 1506 and the like in the allocated SPS resource management table 2500 as described with reference to FIG.
As described above, while sharing the same series of SPS resources with a plurality of terminals, the number of terminals to be shared is changed according to the situation, thereby suppressing both occurrence of free resources and resource shortage, and wireless utilization efficiency. It contributes to the improvement.

  In the eighth embodiment to which the present invention is applied, the voice data is transmitted by the SPS resource in which the data transmitted from the base station to the terminal is voice data. In the following description, the present embodiment will be described based on the characteristics of audio data. However, the same processing as that described in this embodiment can be performed on data other than audio data. Here, the feature of the voice data means that the vocoder on the transmission side outputs a voice frame at a constant time period. In addition, since it is necessary for the vocoder on the receiving side to input voice frames at a fixed time period, a de-jitter buffer is usually provided in front of the vocoder on the receiving side in order to absorb delay jitter in the wireless communication section. That is, a delay that can be absorbed by the de-jitter buffer is allowed. On the other hand, audio frames that exceed the delay amount allowed by the de-jitter buffer are discarded.

  The procedure for applying the present embodiment and transmitting audio data will be described with reference to FIGS. 20 and 21. FIG. FIG. 20 shows a state of audio data transmission using SPS. In FIG. 20, a speech encoding method is assumed in which speech frames are output at a constant time period and the size is different for each speech frame, such as AMR and EVRC. Further, in FIG. 20, the SPS cycle is made to coincide with the speech frame cycle. Therefore, in FIG. 20, a voice frame is transmitted in each SPS resource. Since each audio frame has a different size, SPS resources sufficient to transmit a maximum size audio frame are secured. Therefore, it is necessary to perform padding except when transmitting the maximum size audio frame.

  FIG. 21 shows a state of data transmission when this embodiment is applied to audio data transmission. In FIG. 21, data transmission is not performed in the first SPS resource (2101), but data transmission is delayed to the next SPS resource (2102). In the next SPS resource (2102), two user data (2103 and 2104) are transmitted together. As described above, by applying the present embodiment, it is possible to improve the wireless utilization efficiency by utilizing the characteristics of the audio data. Here, it is desirable to set so that the data transmission is delayed within a delay time 2110 that does not exceed the delay amount allowed by the de-jitter buffer. For example, as described with reference to FIGS. 7 and 8, the delay amount is limited, and the maximum delay amount is set to a delay amount allowed by the de-jitter buffer.

  The free resources (2101) generated in FIG. 21 may be allocated to other terminals as in the second embodiment. Further, as in the third to seventh embodiments, a series of SPS resources may be shared by a plurality of terminals.

Here, when a series of SPS resources are shared by a plurality of terminals, the amount of reserved resources may be insufficient with respect to the amount of user data to be transmitted due to a change in traffic amount or the like. In particular, in the case of a service with high immediacy such as voice traffic, if data transmission continues to be delayed due to lack of resources, the service quality is degraded. Therefore, when resources are insufficient, a packet delayed by a certain amount or more, for example, a packet having a delay exceeding the allowable range of the de-jitter buffer for absorbing the delay jitter in the voice decoding on the receiving side may be discarded. As in the seventh embodiment, the number of terminals sharing a series of SPS resources and the combination of terminals may be changed. Alternatively, when resources are insufficient, additional resources may be temporarily allocated by the DS method.
Also, in order to avoid packet discard due to resource shortage, a series of SPS resources are shared only when the number of terminals connected to the base station is large, and when the number of terminals connected to the base station is small, a series of SPS resources It may be switched to stop sharing.
As described above, by delaying the transmission of audio frames within the range allowed by the de-jitter buffer, the amount of padding is reduced, contributing to the improvement of wireless utilization efficiency and contributing to the prevention of service quality degradation. To do.

  ADVANTAGE OF THE INVENTION According to this invention, generation | occurrence | production of the meaningless data and its amount can be suppressed by delaying data transmission, and the radio utilization efficiency in a radio | wireless communications system can be improved.

101a, 101b, 101c: base stations 102a, 102b, 102c: terminal 300: SPS resource 1001: SPS resource A
1002, 1004: Padding 1003: SPS resource B
1005: User data 1
1006: User data 2
2500: Allocated SPS resource management table 2501: Terminal ID
2502: RB index 2505: SPS resource time period 2506: SPS resource time offset 2606: Base station control unit 2607: Base station memory 2706: Terminal control unit 2707: Terminal memory

Claims (19)

A wireless communication system,
A transmitting station, and a receiving station that performs wireless communication with the transmitting station,
The transmitting station is
As a resource for transmitting data destined for the receiving station, a first radio resource configured by a first time zone, and a second time zone configured by a second time zone after the first time zone The radio resources are stored in association with the receiving station,
When transmitting first data that is held by the transmitting station before the first time period and is destined for the receiving station with which the association has been made, the first station is associated with the receiving station. Further, selection of which one of the first radio resource and the second radio resource to use is selected.
Performing based on the data amount of the first data;
A wireless communication system. The wireless communication system according to claim 1,
The transmitting station is
When selecting to transmit the first data using the second radio resource,
Transmitting the first data together with second data that is held by the transmitting station after the first time zone and is addressed to the receiving station with which the correspondence has been made;
A wireless communication system. The wireless communication system according to claim 1,
The transmitting station is
Making the selection based on a comparison between a data amount of the first data and a capacity of the first radio resource;
A wireless communication system. A wireless communication system according to claim 3,
The transmitting station is
In the selection, when the difference between the data amount of the first data and the capacity of the first radio resource is equal to or larger than a predetermined threshold, the second radio resource is used for transmission of the first data. Selected,
Transmitting the first data to the associated receiving station using the selected second resource;
A wireless communication system. A wireless communication system according to claim 3,
The transmitting station is
In the selection, when the number of times that the data amount of the first data is less than the capacity of the first radio resource is equal to or greater than a predetermined threshold, the second radio resource is selected for transmission of the first data. And
Transmitting the first data to the associated receiving station using the selected second resource;
A wireless communication system. The wireless communication system according to claim 1,
The transmitting station is
When the capacity of the first radio resource is larger than the data amount of data destined for the receiving station to which the correspondence is made using the first radio resource, the correspondence is made Along with data destined for the receiving station, it transmits meaningless data using the first radio resource,
When the capacity of the second radio resource is larger than the data amount of the data destined for the receiving station to which the association is performed using the second radio resource, the association is performed. Using the first radio resource to transmit meaningless data together with data destined for the receiving station;
A wireless communication system. The communication system according to claim 6,
The transmission of the meaningless data is zero padding;
A communication system characterized by the above. The wireless communication system according to claim 1,
The capacity of the first radio resource and the capacity of the second radio resource are determined based on the width of the frequency band constituting each radio resource and the length of the time zone constituting each radio resource,
The first radio resource and the second radio resource are configured by the same frequency band,
The length of the first time zone and the length of the second time zone are the same,
An interval between the first time points of the first time zone and the second time zone is a constant value;
A wireless communication system. The wireless communication system according to claim 1,
The transmitting station is
When performing the transmission of the first data using the second radio resource without using the first radio resource,
Using the first radio resource to transmit data destined for the receiving station not associated with the first radio resource and the second radio resource;
A wireless communication system. The wireless communication system according to claim 1,
The transmitting station is
Storing the first radio resource and the second radio resource in association with a plurality of the receiving stations as a resource for transmitting data destined for a plurality of the receiving stations,
Based on the data amount of data destined for each of the plurality of the receiving stations that are associated with each other,
Data transmission destination using the first radio resource associated with the plurality of receiving stations and data transmission destination using the second radio resource associated with the plurality of receiving stations , From a plurality of the receiving stations that are associated with each other,
A wireless communication system. The wireless communication system according to claim 10,
The transmitting station is
Based on the number of the first radio resource and the second radio resource that are not used for transmission of data destined for the receiving station to which the association is made,
Determining the number of the receiving stations that perform the association or the combination of the receiving stations that perform the association;
A wireless communication system. The wireless communication system according to claim 1,
The receiving station is
A buffer for holding data received from the transmitting station;
The wireless communication system, wherein an interval between first time points of the first time zone and the second time zone is equal to or less than a threshold value based on a capacity of the buffer. A wireless base station device that performs wireless communication with a wireless terminal device,
A data holding unit for holding data destined for the wireless terminal device;
As a transmission resource for data destined for the wireless terminal device, a first wireless resource configured by a first time zone and a second time zone configured after the first time zone A resource storage unit for storing two radio resources in association with the at least one radio terminal device;
Sending the first data, which is the data held in the data holding unit before the first time zone, using the second radio resource, with the associated wireless terminal device as the destination A data transmission unit,
A radio base station apparatus characterized by the above. The radio base station apparatus according to claim 13,
The data transmitter is
The first data is sent to the second radio resource together with the second data which is the data held in the data holding unit after the first time period with the associated wireless terminal device as a destination. Sending using
A radio base station apparatus characterized by the above. The radio base station apparatus according to claim 13,
The data transmitter is
When the capacity of the first radio resource is larger than the data amount of the data destined for the radio terminal device to which the association is performed using the first radio resource, the association is performed. Along with the data destined for the wireless terminal device, the nonsense data is transmitted using the first wireless resource,
If the capacity of the second radio resource is larger than the data amount of the data destined for the radio terminal device to which the association is performed using the second radio resource, the association is performed. Using the first radio resource to transmit meaningless data together with the data destined for the radio terminal device;
A radio base station apparatus characterized by the above. The radio base station apparatus according to claim 14,
The transmission of the meaningless data is zero padding;
A radio base station apparatus characterized by the above. The radio base station apparatus according to claim 13,
The first radio resource and the second radio resource that the resource storage unit stores in association with the radio terminal device are:
Composed of the same frequency band,
The length of the first time zone and the length of the second time zone are the same,
An interval between the first time points of the first time zone and the second time zone is a constant value;
A radio base station apparatus characterized by the above. A wireless terminal device that performs wireless communication with a wireless base station device,
A wireless terminal device whose destination is the first wireless resource corresponding to the first time zone and the second wireless resource corresponding to the second time zone after the first time zone A resource allocation storage unit for storing resource allocation information notified from the radio base station apparatus, indicating that the radio terminal apparatus is associated as a resource for receiving addressed data;
The radio base station apparatus refers to the resource allocation information, and uses the second radio resource associated with the radio terminal apparatus by the resource allocation information, and the radio base station apparatus holds before the first time period A receiving unit that receives the first data that is the data addressed to the wireless terminal device,
A wireless terminal device. The wireless terminal device according to claim 18, wherein
The receiver is
Performing the reception of the first data together with the reception of the second data held by the radio base station apparatus after the first time period using the second radio resource;
A wireless terminal device.

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