WO2019065277A1 - Mobile station device and base station device in mobile object communication system - Google Patents

Abstract

According to the present invention, in a wireless communication system including at least a base station device and a mobile station device, the mobile station device sets a plurality of quasi-static uplink scheduling resources according to control information from the base station device, and transmits a plurality of pieces of uplink data by allocating the plurality of quasi-static uplink scheduling resources thereto respectively, wherein the mobile station device switches the allocation of transmission of the plurality of pieces of uplink data and the plurality of quasi-static uplink scheduling resources, while the plurality of pieces of uplink data are transmitted by using the plurality of quasi-static uplink scheduling resources.

Description

Mobile station apparatus and base station apparatus in mobile communication system

The present invention relates to a mobile station apparatus and a base station apparatus in a mobile communication system.
Priority is claimed on Japanese Patent Application No. 2017-184639, filed on Sep. 26, 2017, the content of which is incorporated herein by reference.

Conventionally, Evolved Universal Terrestrial Radio Access (hereinafter referred to as "EUTRA"), which is an evolution of the third generation mobile communication system in the standardization organization 3GPP (3rd Generation Partnership Project), and its advanced form, Advanced Specification standardization of EUTRA (also referred to as “LTE-Advanced”) has been performed, and commercialization of mobile communication using it has been performed in various countries (Non-Patent Document 1). Also, in recent years, in 3GPP, as a technology of the 5th generation mobile communication system, URL-LC (Ultra-Reliable and Low Latency Communication) realizing high reliability and low delay is attracting attention.

One of the techniques for realizing low delay communication is a method of periodically allocating communication resources by semi-persistent scheduling (SPS). This is different from dynamic scheduling in which allocation of communication resources is performed by signaling called grant for each subframe, and by allocating communication resources at predetermined time intervals, grants can be omitted and overhead is reduced. Technology that enables efficient communication. It is also used in conventional LTE and LTE-Advanced, and has been used for communications that require real-time capability such as voice service, but even in the 5th generation mobile communication method, examination and specification standardization for the purpose of further evolution of SPS Is advancing.

3D Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 14) 3GPP TS 36.300 V14 .3.0 (2017-06)

However, when switching between allocation of multiple SPS uplink resources and logical channels, data transmission currently being performed is terminated or data transmission is temporarily interrupted, and reconfiguration of SPS uplink resources and logical channel allocation are performed. It had to be redone, and it was inefficient.

SUMMARY OF THE INVENTION In view of the above problems, an aspect of the present invention aims to provide means for efficiently switching between allocation of a plurality of uplink SPS resources and logical channels.

(1) An aspect of the present invention is made to solve the above-mentioned problems, and a mobile station apparatus according to the aspect of the present invention is a mobile station apparatus of a wireless communication system including at least a base station apparatus and a mobile station apparatus. A plurality of uplink quasi-static scheduling resources are set according to control information from the base station apparatus, and a plurality of uplink data are allocated and transmitted respectively to the plurality of uplink quasi-static scheduling resources. In the mobile station apparatus, during transmission of the plurality of uplink data using the plurality of uplink quasi-static scheduling resources, transmission of the plurality of uplink quasi-static scheduling resources and the plurality of uplink data Switch assignments.

(2) Further, a mobile station apparatus according to an aspect of the present invention is the above-described mobile station apparatus, wherein switching of allocation of transmissions of the plurality of uplink quasi-static resources and the plurality of uplink data is the base It performs according to the uplink quasi-static scheduling resource switching control information transmitted from the station apparatus.

(3) Further, a base station apparatus according to an aspect of the present invention is a base station apparatus of a wireless communication system including at least a base station apparatus and a mobile station apparatus, and setting information of a plurality of uplink quasi-static scheduling resources In the base station apparatus which transmits to the mobile station apparatus and receives a plurality of uplink data from the mobile station apparatus using the plurality of uplink quasi-static scheduling resources, the plurality of uplink quasi-static scheduling resources Switch between allocation of transmission of the plurality of uplink quasi-static scheduling resources and transmission of the plurality of uplink data during reception of the plurality of uplink data.

(4) Further, a base station apparatus according to an aspect of the present invention is the above-described base station apparatus, wherein switching of allocation of transmission of the plurality of uplink quasi-static scheduling resources and the plurality of uplink data is uplink The SPS resource switching control information is transmitted to the mobile station apparatus to carry out.

(5) Further, a base station apparatus according to an aspect of the present invention is the above-described base station apparatus, wherein switching of allocation of transmission of the plurality of uplink quasi-static scheduling resources and transmission of the plurality of uplink data is performed It is judged by the channel quality of a plurality of uplink quasi-static scheduling resources.

According to an aspect of the present invention, switching of allocation of a plurality of uplink SPS resources and logical channels can be performed efficiently.

It is a figure which shows an example of a structure of the mobile station apparatus in 1 aspect of this invention. It is a figure which shows an example of a structure of a base station apparatus in 1 aspect of this invention. It is a figure which shows an example of uplink SPS resource setting information. It is a figure which shows an example of matching of a logical channel and uplink SPS setting. It is a figure which shows an example of allocation of several logical channels, PDU, and uplink SPS resource. It is a figure which shows an example of the flow of the process which utilizes uplink SPS resource in a prior art. It is a figure which shows an example of the content of uplink SPS resource switching CE in 1 aspect of this invention. It is a figure which shows an example of the flow of the switching process of uplink SPS resource in 1 aspect of this invention. It is a figure which shows an example of a structure of the mobile station apparatus in 1 aspect of this invention. It is a figure which shows an example of a structure of a base station apparatus in 1 aspect of this invention.

First Embodiment
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an example of a configuration of a mobile station apparatus in the present embodiment. In FIG. 1, reference numeral 101 denotes a control unit, which controls all components. Reference numeral 102 denotes an upper layer interface unit, which sets up and manages a logical channel with the upper layer, and transmits and receives uplink data and downlink data through the logical channel. Reference numeral 103 denotes an uplink PDU (Protocol Data Unit), which adds a header to uplink transmission data received from the upper layer received through the logical channel and combines data of a plurality of logical channels to construct an uplink PDU. A transmission processing unit 104 performs error correction coding processing, modulation processing, and the like on the uplink PDU created by the uplink PDU configuration unit 103, and performs mapping on the uplink SPS resource instructed from the uplink SPS resource management unit 106. The uplink PDU management unit 105 manages the priority of uplink PDUs created by the uplink PDU configuration unit 103, the remaining amount of unsent data, and the like. The uplink SPS resource management unit 106 manages uplink SPS resources allocated from the base station apparatus, and controls mapping of uplink PDUs and transmission resources. The reception processing unit 107 demodulates and decodes an error correction code on the received signal from the wireless interface unit 110, and reconstructs a downlink PDU. The downlink PDU separation unit 108 separates the downlink PDU received from the reception processing unit 107 into one or more pieces of data, sends user data and control data to the upper layer via the upper layer interface unit 102, and performs CE (Control Element). ) The data is sent to the control unit 101. The wireless interface unit 109 transmits and receives wireless signals to and from the base station apparatus.

FIG. 2 is an example of a configuration of a base station apparatus in the present embodiment. In FIG. 2, reference numeral 201 denotes a control unit, which controls all the components. An upper layer interface unit 202 sets and manages a logical channel with the upper layer, and transmits and receives uplink data and downlink data through the logical channel. Reference numeral 203 denotes a downlink PDU configuration unit, which adds headers, combines data of a plurality of logical channels, etc. to the downlink transmission data from the upper layer received through the logical channel and to the uplink SPS resource switching CE from the downlink CE generation unit 205 And configure downlink PDUs. A transmission processing unit 204 performs error correction coding processing, modulation processing, and the like on the downlink PDU created by the downlink PDU configuration unit 203, and transmits the downlink PDU to the mobile station apparatus via the radio interface unit 209. A downlink CE generation unit 205 generates an uplink SPS switching CE according to the uplink SPS resource switching notification from the uplink SPS management unit 206, and transmits the uplink SPS switching CE to the downlink PDU configuration unit 204. The uplink SPS management unit 206 performs uplink SPS setting to be assigned to the mobile station apparatus, uplink SPS setting, and frequency band allocation. Also, based on the frequency band channel quality information from the reception processing unit 207, the uplink CE server unit 205 performs uplink SPS resource switching notification to the downlink CE generation unit 205. The reception processing unit 207 demodulates and decodes an error correction code on the reception signal from the wireless interface unit 210, and reconstructs an uplink PDU. The uplink PDU separation unit 208 separates the uplink PDU reconstructed by the reception processing unit 207 into one or more data, and sends user data and control data to the upper layer through the upper layer interface unit 202. The radio interface unit 209 transmits and receives radio signals to and from the mobile station apparatus.

An example of uplink SPS setting, allocation of each frequency band and uplink SPS setting, and management performed by the base station apparatus to the mobile station apparatus will be described with reference to FIGS. 3 and 4. First, uplink SPS setting information as shown in FIG. 3 is notified from the base station apparatus to the mobile station apparatus. In the uplink SPS setting information, the uplink SPS setting index, the setting content of the corresponding uplink SPS, and the frequency band to be used are described. Although only the time interval (interval) is described as an example of uplink SPS setting contents in FIG. 3, all settings (MCS, repetition count, etc.) related to the uplink SPS may be included. Next, correspondence information between the logical channel and the uplink SPS setting index as shown in FIG. 4 is notified from the base station apparatus to the mobile station apparatus. This makes it clear which uplink SPS setting is used to transmit uplink transmission data of each logical channel.

FIG. 5 is a diagram showing an example of allocation of a plurality of logical channels and PDUs, and uplink SPS resources. As shown in FIG. 5, a plurality of logical channels are set with priority as an interface with the upper layer. Each logical channel data is configured as the same PDU after adding and combining a header based on the logical channel and uplink SPS setting index correspondence information of FIG. In the example of FIG. 5, uplink transmission data of the high priority logical channels LCH_A and LCH_B are configured as PDU1, and the low priority logical channels LCH_C and LCH_D are configured as PDU2. Then, PDU1 including LCH_A and LCH_B is transmitted on the uplink SPS resource (SPS-Config-a) in frequency band A, and PDU2 including LCH_C and LCH_D according to the correspondence information between the logical channel and the uplink SPS setting index in FIG. The uplink SPS resource (SPS-Config-b) in the frequency band B is transmitted.

FIG. 6 shows the flow of uplink SPS data transmission in the prior art. Here, uplink SPS resources with time intervals α and β are allocated from the base station to two frequency bands A and B respectively, PDU 1 is transmitted in frequency band A and PDU 2 is transmitted in frequency band B I assume. Immediately after the start of communication, the frequency band A has high propagation path quality, and the frequency band B has medium propagation path quality and is lower than the frequency band A. However, it is assumed that the channel quality of the frequency band A is degraded at time t1, and conversely, the channel quality of the frequency band B is improved. At this time, a failure occurs in part or all of the transmission of PDU1 performed in the uplink SPS resource in frequency band A, and the throughput decreases and the delay increases compared to PDU 2 transmitted in the uplink SPS resource in frequency band B Etc.

In view of such problems, this embodiment can cope with temporal changes in propagation path quality in each frequency band, and can transmit PDUs with high priority using uplink SPS resources in frequency bands with higher propagation path quality. In order to do so, uplink SPS resource setting for each frequency band can be switched by transmitting uplink SPS resource switching CE from the base station apparatus to the mobile station apparatus. FIG. 7 shows an example of the content of the uplink SPS resource switching CE. In the example of FIG. 7, the correspondence information of the timing which switches uplink SPS resource, and uplink SPS setting index with respect to the frequency bands A and B is included. Information other than this may be included, and switching timing may not be included.

FIG. 8 shows an example of the flow of processing in this embodiment. First, the time intervals of the uplink SPS resources in frequency bands A and B are α and β as in FIG. 6, and the uplink SPS resources in frequency band A (SPS-Config-a) are PDU 1 and uplink SPS in frequency band B The transmission of PDU 2 by the resource (SPS-Config-b) is also similar to FIG. Here, as in FIG. 6, it is assumed that the propagation path quality of the frequency band A is degraded at time t1 and the propagation path quality of the frequency band B is improved. After time t1, when the base station apparatus recognizes a change in channel quality in frequency bands A and B, uplink SPS resource switching CE is transmitted from the base station apparatus to the mobile station apparatus (time t2). Here, it is assumed that the content of the uplink SPS resource switching CE is as shown in FIG. The mobile station apparatus having received the SPS switching CE replaces the settings of the uplink SPS resources in the frequency bands A and B with SPS-Config-b and SPS-Config-a, respectively. Then, at the start timing designated by the SPS switching CE, the transmission of PDU2 is resumed by the uplink SPS resource of the frequency band A and the transmission of PDU1 by the uplink SPS resource of the frequency band B.

As described above, according to the first embodiment of the present invention, uplink SPS resources are allocated during transmission of uplink PDUs including uplink transmission data of a high priority logical channel using uplink SPS resources. Even if the propagation path quality of the existing frequency band is degraded, it is possible to instantaneously switch to transmission using the upstream SPS resource of another frequency band with high propagation path quality, and efficient communication becomes possible. .

In this embodiment, although an example in the case of SPS has been described, one aspect of the present invention is not limited to SPS, and can be applied to grant free transmission which does not require a grant from a base station apparatus. It is. Second Embodiment
In the first embodiment, instantaneous switching of uplink SPS resources is realized by sending uplink SPS resource switching CE from the base station apparatus to the mobile station apparatus, but it can also be performed by signaling of the physical layer. This will be described as a second embodiment.

An example of the configuration of the mobile station apparatus in this embodiment is illustrated in FIG. In FIG. 9, the components 901 to 909 are substantially the same as 101 to 109 in FIG. Note that, when an uplink SPS switching signal is included in the downlink physical control channel, the reception processing unit 907 notifies the control unit 901 of the information.

An example of a structure of the base station apparatus in this embodiment is illustrated in FIG. In FIG. 10, the respective components 1001 to 1009 are substantially the same as 201 to 209 in FIG. However, based on the frequency band channel quality information from the reception processing unit 907, the uplink SPS management unit 906 notifies the transmission processing unit 1004 of uplink SPS resource switching. Also, the generation of uplink SPS resource switching CE is not performed in the downlink CE generation unit 1005, and instead, the transmission processing unit 1004 that receives the uplink SPS resource switching notification from the uplink SPS management unit 906 switches the uplink SPS to downlink physical control channel. A signal is transmitted to the mobile station apparatus via the wireless interface unit 1009 including the signal.

In the uplink SPS resource switching process in the present embodiment, at time t2 in FIG. 8, the uplink SPS resource switching signal is included in the downlink physical control channel and transmitted from the base station apparatus instead of the uplink SPS resource switching CE. , And the same process flow.

As described above, according to the second embodiment of the present invention, uplink SPS resources are allocated during transmission of uplink PDUs including uplink transmission data of a high priority logical channel using uplink SPS resources. Even if the propagation path quality of the existing frequency band is degraded, it is possible to instantaneously switch to transmission using the upstream SPS resource of another frequency band with high propagation path quality, and efficient communication becomes possible. .

In this embodiment, although an example in the case of SPS has been described, one aspect of the present invention is not limited to SPS, and can be applied to grant free transmission which does not require a grant from a base station apparatus. It is.

A program for realizing all or a part of the functions of the mobile station apparatus and the base station apparatus described above is recorded in a computer readable recording medium, and the program recorded in the recording medium is recorded in a computer system. The processing of each part may be performed by reading and executing. Here, the “computer system” includes an OS and hardware such as peripheral devices.

The "computer system" also includes a homepage providing environment (or display environment) if the WWW system is used.

The “computer-readable recording medium” means a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in a computer system. Furthermore, “computer-readable recording medium” dynamically holds a program for a short time, like a communication line in the case of transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, the volatile memory in the computer system which is the server or the client in that case, and the one that holds the program for a certain period of time is also included. The program may be for realizing a part of the functions described above, or may be realized in combination with the program already recorded in the computer system.

Also, all or part of the functions of the mobile station apparatus and the base station apparatus may be integrated into an integrated circuit. Each functional block may be chiped individually, or part or all may be integrated and chipped. Further, the method of circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible. In the case where an integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology, it is also possible to use an integrated circuit according to such technology.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope of the present invention are also included.

One aspect of the present invention is suitable for use in a wireless communication system or communication apparatus. One embodiment of the present invention is used, for example, in a communication system, a communication device (for example, a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (for example, a communication chip), or a program. be able to.

101 ... control unit 102 ... upper layer interface unit 103 ... uplink PDU configuration unit 104 ... transmission processing unit 105 ... uplink PDU management unit 106 ... uplink SPS resource management unit 107 ... reception processing unit 108 ... downlink PDU separation unit 109 ... radio interface unit 201 Control unit 202 Upper layer interface unit 203 Downlink PDU configuration unit 204 Transmission processing unit 205 Downlink CE generation unit 206 Uplink SPS resource management unit 207 Reception processing unit 208 Uplink PDU separation unit 209 Radio interface unit 901: control unit 902: upper layer interface unit 903: uplink PDU configuration unit 904: transmission processing unit 905: uplink PDU management unit 906: uplink SPS resource management unit 907: reception processing unit 908: downlink PDU separation unit 909: wireless interface unit 1001 ... control unit 10 2 ... upper layer interface unit 1003 ... downlink PDU constructing unit 1004 ... transmission processing unit 1005 ... downlink CE generator 1006 ... uplink SPS resource management unit 1007 ... reception processing unit 1008 ... upstream PDU separation unit 1009 ... wireless interface unit

Claims (5)

A base station apparatus, a mobile station apparatus of a wireless communication system including at least a mobile station apparatus, comprising:
Setting a plurality of uplink quasi-static scheduling resources according to the control information from the base station apparatus;
In the mobile station apparatus, which allocates and transmits a plurality of uplink data respectively to the plurality of uplink quasi-static scheduling resources,
Switching between allocation of transmission of the plurality of uplink quasi-static scheduling resources and transmission of the plurality of uplink data during transmission of the plurality of uplink data using the plurality of uplink quasi-static scheduling resources Station equipment. The mobile station according to claim 1, wherein switching of allocation of transmission of the plurality of uplink quasi-static resources and transmission of the plurality of uplink data is performed according to uplink quasi-static scheduling resource switching control information transmitted from the base station apparatus. Station equipment. A base station apparatus, a base station apparatus of a wireless communication system including at least a mobile station apparatus,
Transmits configuration information of a plurality of uplink quasi-static scheduling resources to the mobile station apparatus;
In the base station apparatus that receives a plurality of uplink data from a mobile station apparatus using the plurality of uplink quasi-static scheduling resources,
A base that switches allocation of transmission of the plurality of uplink quasi-static scheduling resources and the plurality of uplink data during reception of the plurality of uplink data using the plurality of uplink quasi-static scheduling resources Station equipment. The base station apparatus according to claim 3, wherein switching of allocation of transmissions of the plurality of uplink quasi-static scheduling resources and the plurality of uplink data is performed by transmitting uplink SPS resource switching control information to the mobile station apparatus. . The base station apparatus according to claim 3, wherein switching of allocation of transmission of the plurality of uplink quasi-static scheduling resources and the transmission of the plurality of uplink data is determined based on channel quality of the plurality of uplink quasi-static scheduling resources. .

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