Mobile station device and base station device in mobile communication system

Abstract

The invention comprises: a state management unit, which controls a prescribed communication resource allocation process; and a receiving processing unit, which receives a CE (Control Element), wherein the prescribed communication resource allocation process is a process of allocating communication resources at predetermined time intervals, and when the receiving processing unit receives an SCell activation / deactivation MAC CE for deactivating a secondary cell, or when the sCellDeactivationTimer set for the secondary cell expires, the state management unit reserves an uplink authorization constructed for the prescribed communication resource allocation process, and after the state management unit reserves the uplink authorization, when the receiving processing unit receives an SCell activation / deactivation MAC CE for activating the secondary cell, the state management unit reinitializes the reserved uplink authorization.

Description

Technical Field

[0001] The present invention relates to a mobile station device and a base station arrangement in a mobile communication system.

[0002] This application claims priority to Japanese Patent Application No. 2017-219907 filed in Japan on November 15, 2017, the contents of which are incorporated herein by reference. Background Art

[0003] In the past, the standardization group 3GPP (3rd Generation Partnership Project) has been standardizing the specifications of Evolved Universal Terrestrial Radio Access (hereinafter referred to as "EUTRA"), which is the evolution of the third-generation mobile communication method, and Advanced EUTRA (also known as "LTE-Advanced"), which is its further development, and commercializing mobile communications using them in various countries (Non-Patent Document 1). In addition, in recent years, in 3GPP, URLLC (Ultra-Reliable and Low Latency Communication) that achieves high reliability and low latency has attracted attention as a technology for the fifth-generation mobile communication method.

[0004] As one of the scheduling (communication resource allocation) technologies, there is a method of periodically allocating communication resources based on semi-persistent scheduling (SPS). This is a technology that is different from dynamic scheduling that allocates communication resources per subframe using a signaling called authorization. By allocating communication resources at predetermined time intervals, authorization can be omitted, and the overhead caused by control signals can be reduced, thereby achieving efficient communication. It has also been adopted in the previous LTE (Long Term Evolution) and LTE-Advanced (Advanced Long Term Evolution) for communications that require real-time performance, such as voice services, but research and specification standardization are also being conducted in the fifth-generation mobile communication method with the purpose of further evolving SPS. In addition, research and specification standardization are also being conducted on an uplink-free (GF: Grant Free) communication method that allows uplink data to be transmitted from a mobile station device to a base station device even if there is no uplink authorization allocated from a base station device to a mobile station device, using uplink SPS.

[0005] Prior art literature

[0006] Non-patent literature

[0007] Non-patent document 1: "3rd Generation Partnership Project; TechnicalSpecification 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 36.300V14.3.0 (2017-06) Summary of the invention

[0008] Problem that the invention aims to solve

[0009] However, in the conventional semi-persistent scheduling and uplink unlicensed communication methods, there is a problem that a control method for activation and deactivation of a serving cell is not specified.

[0010] A solution of the present invention is made in view of the above-mentioned problem, and its object is to provide a communication device having a semi-static scheduling for activation and deactivation of a serving cell and a control method for uplink unauthorized access.

[0011] Technical Solution

[0012] (1) One scheme of the present invention is used to solve the above-mentioned problem. Therefore, a mobile station device of one scheme of the present invention includes: a state management unit, which controls a prescribed communication resource allocation process as a mobile station device communicating with a base station device; and a reception processing unit, which receives a CE (Control Element), wherein the prescribed communication resource allocation process is a process of allocating communication resources at a predetermined time interval. When the reception processing unit receives an SCell activation / deactivation (Activation / Deactivation) MAC CE for deactivating a secondary cell, or when an sCellDeactivationTimer set for the secondary cell expires, the state management unit reserves an uplink grant configured for the prescribed communication resource allocation process. After the state management unit reserves the uplink grant, when the reception processing unit receives an SCell activation / deactivation MAC CE for activating the secondary cell, the state management unit reinitializes the reserved uplink grant.

[0013] (2) In addition, a communication method according to one embodiment of the present invention is a communication method for a mobile station device that communicates with a base station device, controls a prescribed communication resource allocation process, receives a CE (Control Element), wherein the prescribed communication resource allocation process is a process for allocating communication resources at predetermined time intervals, and upon receiving an SCell activation / deactivation MAC CE for deactivating a secondary cell, or upon expiration of an sCellDeactivationTimer set for the secondary cell, retains an uplink authorization constructed for the prescribed communication resource allocation process, and after retaining the uplink authorization, upon receiving an SCell activation / deactivation MAC CE for activating the secondary cell, reinitializes the retained uplink authorization.

[0014] (3) In addition, a base station device according to one embodiment of the present invention is a base station device that communicates with a mobile station device, and comprises: a resource management unit that controls a prescribed communication resource allocation process; and a sending processing unit that sends a CE (Control Element), wherein the prescribed communication resource allocation process is a process for allocating communication resources at a predetermined time interval, and when the sending processing unit sends an SCell activation / deactivation MAC CE for deactivating a secondary cell, or when an sCellDeactivationTimer set for the secondary cell expires, the resource management unit reserves an uplink authorization constructed for the prescribed communication resource allocation process, and after the resource management unit reserves the uplink authorization, when the sending processing unit sends an SCell activation / deactivation MAC CE for activating the secondary cell, the resource management unit reinitializes the reserved uplink authorization.

[0015] (4) In addition, a communication method according to one embodiment of the present invention is a communication method of a base station device for communicating with a terminal device, controlling a prescribed communication resource allocation process, and sending a CE (Control Element), wherein the prescribed communication resource allocation process is a process for allocating communication resources at predetermined time intervals, and when an SCell activation / deactivation MAC CE for deactivating a secondary cell is sent, or when an sCellDeactivationTimer set for the secondary cell expires, an uplink authorization constructed for the prescribed communication resource allocation process is retained, and after retaining the uplink authorization, when an SCell activation / deactivation MAC CE for activating the secondary cell is sent, the retained uplink authorization is reinitialized.

[0016] Beneficial Effects

[0017] According to one aspect of the present invention, there is provided a communication device including a control unit for semi-persistent scheduling for activation and deactivation of a serving cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a diagram showing an example of a MAC entity configuration within a mobile station device according to one embodiment of the present invention.

[0019] Figure 2 This is a diagram showing an example of the configuration of a base station device according to one aspect of the present invention.

[0020] Figure 3 It is a diagram showing an uplink SPS / GF state of a mobile station apparatus according to one aspect of the present invention.

[0021] Figure 4 This is a diagram showing an example of transition of the uplink SPS / GF state of the mobile station apparatus according to one aspect of the present invention.

[0022] Figure 5 This is a diagram showing an example of a process flow of a mobile station device according to one aspect of the present invention. DETAILED DESCRIPTION

[0023] (First Embodiment)

[0024] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. Figure 1 This is an example of the configuration of a MAC entity in the mobile station device of this embodiment. Figure 1In the figure, 101 is a control unit, which controls all components. 102 is an upper layer interface unit, which sets and manages logical channels of upper layers such as PDCP (Packet Data Convergence Protocol), RLC (Radio Link Control) and RRC (Radio Resource Control), and transmits and receives uplink data and downlink data through the logical channels. 103 is an uplink PDU (Protocol Data Unit) component, which adds a header to the uplink transmission data received from the upper layer through the logical channel, combines data of multiple logical channels, and constructs an uplink PDU. 104 is a transmission processing unit, which performs error correction coding processing, modulation processing, etc. on the uplink PDU produced by the uplink PDU component unit 103, and maps the uplink SPS resources indicated by the uplink resource management unit 106. 105 is an uplink SPS / GF state management unit, which manages the state of the uplink SPS / GF and changes the state of the uplink SPS / GF when an event related to the uplink SPS / GF occurs. The uplink resource management unit 106 manages the uplink resources allocated by the base station device and controls the mapping of the uplink PDU and the transmission resources. In addition, according to the uplink SPS / GF state managed by the uplink SPS / GF state management unit 105, the uplink SPS / GF resources are set and the configured uplink grant is enabled or disabled. The reception processing unit 107 demodulates the received signal from the wireless interface unit 110, decodes the error correction code, and reconstructs the downlink PDU. The downlink PDU separation unit 108 separates one or more data from the downlink PDU received by the receiving processing unit 107, and the user data and control data are sent to the upper layer via the upper layer interface unit 102, and the CE (Control Element) data is sent to the control unit 101. 110 is the downlink resource management unit, and the wireless interface unit 109 sends and receives wireless signals with the base station device.

[0025] Figure 2 This is an example of the MAC entity configuration in the base station device of this embodiment. Figure 2In the figure, 201 is a control unit, which controls all components. 202 is an upper layer interface unit, which sets and manages logical channels with upper layers such as PDCP, RLC and RRC, and transmits and receives uplink data and downlink data through the logical channels. 203 is a downlink PDU constituent unit, which adds headers to downlink transmission data received from the upper layer through the logical channel, combines data of multiple logical channels, and forms a downlink PDU. 204 is a transmission processing unit, which performs error correction coding processing, modulation processing and downlink resource mapping on the downlink PDU produced by the downlink PDU constituent unit 203 according to the downlink resource management unit 205, and transmits it to the mobile station device via the wireless interface unit 209. 205 is a downlink resource management unit, which manages and schedules downlink resources allocated to the mobile station device. The uplink resource management unit 206 sets and manages uplink resources allocated to the mobile station device. The reception processing unit 207 demodulates the received signal from the wireless interface unit 210, decodes the error correction code, and reconstructs the uplink PDU. The uplink PDU separation unit 208 separates one or more data from the uplink PDU reconstructed by the reception processing unit 207, and sends the user data and control data to the upper layer via the upper layer interface unit 202. The wireless interface unit 209 transmits and receives wireless signals with the mobile station device.

[0026] Figure 3 is a table showing the uplink SPS / GF status of the mobile station apparatus stored in the uplink SPS / GF status storage unit 105. Figure 3 As shown, the uplink SPS / GF is managed in a maximum of four states. The unconfigured state indicates that the SPS / GF is not set. The deactivated state indicates that the configured uplink grant is set but is disabled. The activated state indicates that the configured uplink grant is in effect and the uplink SPS / GF is being sent. The Suspend state indicates that the configured uplink grant remains in effect and the uplink SPS / GF is temporarily stopped.

[0027] Figure 4 (a) and (b) show changes in the uplink SPS / GF state when an uplink SPS / GF association event occurs according to the present embodiment. Figure 4 (a) is the uplink SPS / GF state transition table, indicating that Figure 4 When the state recorded in the top row of (a) occurs Figure 4In the case of an event related to uplink SPS / GF recorded in the leftmost column of (a), the state changes to the state recorded in the square where the column of the state at that time intersects the row of the event that occurred. In addition, the square indicated by a hyphen indicates that no state transition occurs. Figure 4 (b) is to Figure 4 (a) is a diagram of the uplink SPS / GF state transition diagram, where circles represent states and arrows represent how states change according to uplink SPS / GF associated events. It should be noted that in this embodiment, no Figure 3 The suspend state.

[0028] Figure 5 The flow of messages between the mobile station apparatus and the base station apparatus according to this embodiment, and changes in the uplink SPS / GF state and the state of the secondary cell (SCell) are shown. Figure 5 Each message is sent from the base station apparatus to the mobile station apparatus, and there is also a case where a response including a processing result for the message is sent from the mobile station apparatus to the base station apparatus, but Figure 5This response is omitted for illustration. First, as an initial state, the uplink SPS / GF state and the secondary cell are both in an unconfigured state (unconfigured). Then, as message 501, SCell addition (additional secondary cell) is sent from the base station device to the mobile station device, and the mobile station device performs settings regarding the SCell according to the content of message 501. At this time, the state of the SCell is configured but not yet effective, so it is in a disabled state (configured but deactivated). Next, SPS / GF addition (additional SPS / GF) is sent from the base station device to the mobile station device (message 502), and the mobile station device configures the uplink resources and configured uplink grant for sending through SPS on the UL-SCH of the SCell according to the content of message 502. However, the SCell has not yet taken effect, so the configured uplink grant is also not effective, and the state of the uplink SPS is deactivated. Next, SCell activation (message 503) is sent from the base station device to the mobile station device. The mobile station device sets the SCell to the effective state (configured and activated: configured and activated) according to message 503. In addition, the uplink SPS state also changes from deactivated to activated, the configured uplink grant becomes effective, and SPS transmission is performed. Next, SCelldeactivation (message 504) is sent from the base station device to the mobile station device. The mobile station device sets the SCell to the disabled state (configured but deactivated) according to message 504. In addition, the uplink SPS state also changes from activated to deactivated, the configured uplink grant is disabled, and SPS transmission is stopped. Next, SCellactivation (message 505) is sent again from the base station device to the mobile station device. The mobile station device sets the SCell to the effective state (configured and activated) again according to message 505. In addition, the uplink SPS state also changes from deactivated to activated, the configured uplink grant becomes effective again, and uplink SPS transmission is performed. Next, SPSrelease (SPS release) (message 506) is sent from the base station device to the mobile station device.According to the message 506, the mobile station apparatus stops the uplink SPS transmission, deletes the uplink resource configuration and configured uplink grant related to the uplink SPS, and changes the uplink SPS state from activated to unconfigured.

[0029] As described above, according to the first embodiment of the present invention, uplink SPS / GF can be appropriately controlled during activation and deactivation of SCell, and uplink SPS / GF transmission on SCell can be realized.

[0030] It should be noted that, in the above description, an example of the case of uplink SPS transmission is described, but the present invention is not limited to this and can also be applied to uplink grant-free (GF) transmission.

[0031] (Second Embodiment)

[0032] In the first embodiment, the uplink SPS transmission control is performed by transitioning the state of the uplink SPS according to the state transition table. However, a method of controlling the uplink SPS without using the state transition table will be described as a second embodiment.

[0033] The control method of the uplink SPS of the MAC entity of the mobile station device in the case of applying the second embodiment of the present invention is described. When the serving cell has been activated, or the serving cell has been deactivated and an activation / deactivation MAC CE (Control Element) for activating the serving cell has been received, the MAC entity will activate the uplink SPS transmission with the constructed uplink authorization. In addition, with the release of the uplink SPS set on the serving cell, after the initial transmission of the SPS confirmation MAC CE (semi-static scheduling confirmation MAC control unit), the constructed uplink authorization set on the serving cell will be deactivated. Externally, after receiving the activation / deactivation MAC CE to deactivate the serving cell, or when the sCellDeactivationTimer set for the serving cell expires, the constructed uplink authorization set on the serving cell will be deactivated.

[0034] As described above, according to the second embodiment of the present invention, uplink SPS transmission can be appropriately controlled when activating and deactivating a serving cell.

[0035] It should be noted that, in the above description, an example of the case of uplink SPS transmission is described, but the present invention is not limited to this and can also be applied to uplink grant-free (GF) transmission.

[0036] (Third Embodiment)

[0037] In the second embodiment, the control method of the uplink SPS when activating and deactivating the serving cell is described, but when the uplink SPS is activated by physical layer signaling (also called L1 signaling, DCI (Downlink Control Information), PDCCH (Physical Downlink Control Channel)), when the uplink SPS is also deactivated along with the deactivation of the serving cell, there is a problem that the uplink SPS is not activated even if the serving cell is activated again. A solution to this problem will be described as a third embodiment.

[0038] The MAC entity reserves the uplink grant constructed for uplink SPS transmission after receiving an activation / deactivation MAC CE to deactivate the serving cell or when the sCellDeactivationTimer set for the serving cell expires. In addition, when an activation / deactivation MAC CE to activate the serving cell is received while the uplink grant constructed for uplink SPS transmission is reserved, the reserved constructed uplink grant is restarted.

[0039] As described above, according to the present embodiment, even when uplink SPS is activated through physical layer signaling, uplink SPS authorization can be retained when the serving cell is deactivated, and when the serving cell is activated again, the constructed uplink authorization of the uplink SPS can be restarted.

[0040] It should be noted that, in the above description, an example of the case of uplink SPS transmission is described, but the present invention is not limited to this and can also be applied to uplink grant-free (GF) transmission.

[0041] (Fourth Embodiment)

[0042] An example in which an aspect of the present invention is applied to downlink SPS reception will be described as a fourth embodiment.

[0043] In the case where a certain service cell is deactivated, the MAC entity of the mobile station device may also be set not to receive the DL-SCH (Downlink Shared Channel) on the service cell. In this case, the DL-SCH is not received by the MAC entity of the mobile station device in the resources based on the constructed downlink allocation. In addition, in the case where a certain service cell is deactivated, the MAC entity of the mobile station device may also be set not to receive the PDSCH (Physical Downlink Shared Channel) on the service cell. In this case, the PDSCH based on the constructed downlink allocation is not received by the MAC entity of the mobile station device. In addition, in the case where the service cell has been activated, or the service cell has been deactivated and an activation / deactivation MAC CE (Control Element) for activating the service cell has been received, the MAC entity activates the constructed downlink allocation for downlink SPS reception on the service cell. As another example, in the case where an activation / deactivation MAC CE (Control Element) for activating the service cell has been received, the MAC entity activates the constructed downlink allocation for downlink SPS reception on the service cell.

[0044] As described above, if the present embodiment is applied, downlink SPS communication can be appropriately controlled when activating and deactivating a serving cell.

[0045] It should be noted that the processing of each part can be performed by recording a program for realizing all or part of the functions of the mobile station device and the base station device described above on a computer-readable recording medium, reading the program recorded on the recording medium into a computer system and executing it. It should be noted that the "computer system" mentioned here refers to a computer system including hardware such as an OS (Operating System) and peripheral devices.

[0046] Furthermore, in the case of utilizing the WWW system, the "computer system" also includes a home page providing environment (or display environment).

[0047] In addition, "computer-readable recording medium" refers to removable media such as floppy disks, magneto-optical disks, ROMs, CD-ROMs, and storage devices such as hard disks built into computer systems. Furthermore, "computer-readable recording media" include: media that dynamically store programs for a short period of time, such as communication lines when sending programs via networks such as the Internet or communication lines such as telephone lines; and recording media that store programs for a fixed period of time, such as volatile memories inside computer systems that serve as servers or clients in this case. In addition, the above-mentioned program may be a program for realizing a part of the above-mentioned functions, or a program that can realize the above-mentioned functions by combining with programs already recorded in the computer system.

[0048] In addition, all or part of the functions of the mobile station device and the base station device may be integrated on an integrated circuit. Each functional block may be independently chip-based, or part or all of the functional blocks may be integrated on a chip. In addition, the method of integrated circuitization is not limited to LSI, and may also be implemented using a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears with the advancement of semiconductor technology, an integrated circuit based on the technology may also be used.

[0049] As mentioned above, although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to the embodiment, and design changes and the like that do not depart from the scope of the gist of the present invention are also included.

[0050] Industrial Applicability

[0051] One aspect of the present invention is applicable to a wireless communication system or a communication device. One aspect of the present invention can be used, for example, in a communication system, a communication device (such as a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (such as a communication chip), or a program.

[0052] Explanation of symbols

[0053] 101 Control Department

[0054] 102 Upper layer interface

[0055] 103 Uplink PDU component

[0056] 104 Sending Processing Unit

[0057] 105 Uplink SPS / GF status holding unit

[0058] 106 Uplink Resource Management Unit

[0059] 107 Receiving and Processing Department

[0060] 108 Downlink PDU separation unit

[0061] 109 Wireless Interface

[0062] 110 Downlink Resource Management Unit

[0063] 201 Control Department

[0064] 202 Upper layer interface

[0065] 203 Downlink PDU component

[0066] 204 Sending Processing Department

[0067] 205 Downlink Resource Management Unit

[0068] 206 Uplink Resource Management Unit

[0069] 207 Receiving and Processing Department

[0070] 208 Uplink PDU separation unit

[0071] 209 Wireless Interface

Claims

1. A mobile station device for communicating with a base station device, characterized in that: The mobile station device comprises: a memory having computer-readable instructions stored therein; and at least one processor coupled to the memory, the at least one processor configured to execute the computer-readable instructions to cause the mobile station apparatus to: Receiving a message to configure an uplink grant associated with a secondary cell SCell; After receiving the message, receiving a medium access control element MAC CE; In a case where the MAC CE is used to deactivate the SCell and the uplink grant is an uplink grant sent by uplink semi-persistent scheduling SPS or uplink grant-free GF, suspending the uplink grant; In a case where the MAC CE is used to deactivate the SCell and the uplink SPS or the uplink GF set on the SCell is released, deactivating the uplink grant; In a case where the MAC CE is used to activate the SCell and the uplink grant is suspended, reinitializing the uplink grant; and In a case where the MAC CE is used to activate the SCell and the uplink grant is not suspended, activating the uplink grant.

2. A communication method for a mobile station device communicating with a base station device, characterized in that: The communication method comprises: Receiving a message to configure an uplink grant associated with a secondary cell SCell; After receiving the message, receiving a medium access control element MAC CE; In a case where the MAC CE is used to deactivate the SCell and the uplink grant is an uplink grant sent by uplink semi-persistent scheduling SPS or uplink grant-free GF, suspending the uplink grant; In a case where the MAC CE is used to deactivate the SCell and the uplink SPS or the uplink GF set on the SCell is released, deactivating the uplink grant; In a case where the MAC CE is used to activate the SCell and the uplink grant is suspended, reinitializing the uplink grant; and In a case where the MAC CE is used to activate the SCell and the uplink grant is not suspended, activating the uplink grant.

3. A base station device for communicating with a mobile station device, characterized in that: The base station device comprises: a memory having computer-readable instructions stored therein; and at least one processor coupled to the memory, the at least one processor configured to execute the computer-readable instructions to cause the base station apparatus to: Send a message to configure an uplink grant associated with the secondary cell SCell; After sending the message, sending a medium access control element MAC CE; In a case where the MAC CE is used to deactivate the SCell and the uplink grant is an uplink grant sent by uplink semi-persistent scheduling SPS or uplink grant-free GF, suspending the uplink grant; In a case where the MAC CE is used to deactivate the SCell and the uplink SPS or the uplink GF set on the SCell is released, deactivating the uplink grant; In a case where the MAC CE is used to activate the SCell and the uplink grant is suspended, reinitializing the uplink grant; and In a case where the MAC CE is used to activate the SCell and the uplink grant is not suspended, activating the uplink grant.

4. A communication method for a base station device communicating with a mobile station device, characterized in that: The communication method comprises: Send a message to configure an uplink grant associated with the secondary cell SCell; After sending the message, sending a medium access control element MAC CE; In a case where the MAC CE is used to deactivate the SCell and the uplink grant is an uplink grant sent by uplink semi-persistent scheduling SPS or uplink grant-free GF, suspending the uplink grant; In a case where the MAC CE is used to deactivate the SCell and the uplink SPS or the uplink GF set on the SCell is released, deactivating the uplink grant; In a case where the MAC CE is used to activate the SCell and the uplink grant is suspended, reinitializing the uplink grant; and In a case where the MAC CE is used to activate the SCell and the uplink grant is not suspended, activating the uplink grant.

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