WO2014188811A1 - 通信制御装置、通信制御方法、端末装置及び情報処理装置 - Google Patents
通信制御装置、通信制御方法、端末装置及び情報処理装置 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
Definitions
- the present disclosure relates to a communication control device, a communication control method, a terminal device, and an information processing device.
- Frequency Division Duplex In LTE (Long Term Evolution) standardized by 3GPP (Third Generation Partnership Project), either Frequency Division Duplex (FDD) or Time Division Duplex (TDD) can be adopted.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- a link direction for example, downlink, uplink
- a link direction for example, downlink, uplink
- a plurality of TDD uplink / downlink configurations representing link directions in units of subframes in a radio frame are prepared in advance, and any one of the TDD configurations is used.
- the telecommunications carrier selects one TDD configuration from among seven TDD configurations defined in the LTE technical standard, and sets the TDD configuration in a fixed manner.
- a technique for dynamically setting an optimal TDD configuration according to traffic in a cell will be studied in 3GPP.
- Non-Patent Document 1 defines a configuration of a physical random access channel (PRACH) for transmitting a random access preamble in a random access procedure.
- PRACH physical random access channel
- Non-Patent Document 2 when a TDD configuration is dynamically set, random access transmitted by a UE (User Equipment) (that is, a legacy UE) that does not have the capability for the dynamic setting. Concerns have been disclosed that the preamble is not received by the eNodeB.
- UE User Equipment
- the random access preamble transmitted by the legacy UE is not received by the eNodeB.
- the random access preamble transmitted by the legacy UE may become an interference source for communications involving other UEs.
- first information for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame And the acquisition part which acquires the 2nd information for identifying the resource for random access about each of these TDD configurations, and broadcasts the 1st information and notifies the 2nd information And a communication control unit.
- the random access resource for each of the plurality of TDD configurations identified from the second information is the random access resource for any of the plurality of TDD configurations identified from the first information. Is also included.
- a first for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame There is provided a communication control device including an acquisition unit that acquires the information and a communication control unit that notifies the first information.
- the random access resource identified from the first information is common among the plurality of TDD configurations.
- a first for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame There is provided a communication control device including an acquisition unit that acquires the information and a communication control unit that notifies the first information.
- the random access resource for each of the plurality of TDD configurations identified from the first information is an uplink resource when any of the plurality of TDD configurations is set.
- a resource for random access for a TDD configuration to be set among a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame.
- TDD time division duplex
- a communication control device including an acquisition unit that acquires a communication device and a communication control unit that prohibits a random access procedure by a terminal device for a predetermined period when a TDD configuration is newly set.
- a first for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame is provided.
- a communication control method is provided.
- the random access resource for each of the plurality of TDD configurations identified from the second information is the random access resource for any of the plurality of TDD configurations identified from the first information. Is also included.
- a first for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame is provided.
- the random access resource identified from the first information is common among the plurality of TDD configurations.
- a first for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame includes obtaining the information and informing the first information.
- the random access resource for each of the plurality of TDD configurations identified from the first information is an uplink resource when any of the plurality of TDD configurations is set.
- TDD time division duplex
- a first for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame Is acquired by the base station and the second information for identifying the random access resource for each of the plurality of TDD configurations is notified by the base station, the second information is acquired.
- a communication control unit for performing an access procedure. End apparatus is provided.
- the random access resource for each of the plurality of TDD configurations identified from the second information is the random access resource for any of the plurality of TDD configurations identified from the first information. Is also included.
- An information processing apparatus including a memory that stores a predetermined program and a processor that can execute the predetermined program.
- the predetermined program includes first information for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame. Is acquired by the base station, and the second information for identifying the random access resource for each of the plurality of TDD configurations is notified by the base station; A random access resource identified from the second information, wherein a random access procedure is performed using the random access resource for the set TDD configuration among the plurality of TDD configurations. To do and to do Is a program.
- the random access resource for each of the plurality of TDD configurations identified from the second information is the random access resource for any of the plurality of TDD configurations identified from the first information. Is also included.
- a first for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame Is acquired by the base station and the second information for identifying the random access resource for each of the plurality of TDD configurations is notified by the base station, the second information is acquired.
- a communication control unit for performing an access procedure. End apparatus is provided.
- the random access resource identified from the first information is common among the plurality of TDD configurations.
- an information processing apparatus including a memory that stores a predetermined program and a processor that can execute the predetermined program.
- the predetermined program includes first information for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame. Is acquired by the base station, and the second information for identifying the random access resource for each of the plurality of TDD configurations is notified by the base station; A random access resource identified from the second information, wherein a random access procedure is performed using the random access resource for the set TDD configuration among the plurality of TDD configurations. To do and to do Is a program. The random access resource identified from the first information is common among the plurality of TDD configurations.
- a first for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame Is acquired by the base station and the second information for identifying the random access resource for each of the plurality of TDD configurations is notified by the base station, the second information is acquired.
- a communication control unit for performing an access procedure. End apparatus is provided.
- the random access resource for each of the plurality of TDD configurations identified from the first information is an uplink resource when any of the plurality of TDD configurations is set.
- an information processing apparatus including a memory that stores a predetermined program and a processor that can execute the predetermined program.
- the predetermined program includes first information for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame. Is acquired by the base station, and the second information for identifying the random access resource for each of the plurality of TDD configurations is notified by the base station; A random access resource identified from the second information, wherein a random access procedure is performed using the random access resource for the set TDD configuration among the plurality of TDD configurations. To do and to do Is a program.
- the random access resource for each of the plurality of TDD configurations identified from the first information is an uplink resource when any of the plurality of TDD configurations is set.
- FIG. 2 is an explanatory diagram illustrating an example of a schematic configuration of a communication system 1 according to an embodiment of the present disclosure.
- FIG. It is a block diagram which shows an example of a function structure of eNodeB which concerns on 1st Embodiment. It is explanatory drawing for demonstrating the example of the combination of the 1st PRACH configuration index and 2nd PRACH configuration index which concern on 1st Embodiment. It is explanatory drawing for demonstrating the example of the relationship between the timing of the new setting of a TDD configuration, and the notification timing of the newly set TDD configuration. It is a block diagram which shows an example of the function structure of UE which concerns on 1st Embodiment.
- TDD in LTE FDD
- TDD Time Division Duplex
- FIG. 1 is an explanatory diagram for explaining an example of a TDD frame format.
- a radio frame is also simply referred to as a “frame”.
- Each of the 10 subframes included in the radio frame is one of a downlink subframe, an uplink subframe, and a special subframe.
- the frame format shown in FIG. 1 is a format for eNodeB.
- the reception completion at the UE of the signal transmitted in the eNodeB downlink subframe is later than the timing of the downlink subframe of the frame format due to the propagation delay in space and the processing delay in the UE.
- transmission of a signal received in the eNodeB uplink subframe at the UE is earlier than the timing of the uplink subframe of the frame format. That is, the UE transmits a signal to the eNodeB in advance.
- the special subframe includes a downlink part DwPTS (Downlink Pilot Time Slot), an uplink part UpPTS (Uplink Pilot Time Slot), and a GP (Guard Period).
- DwPTS includes PDCCH.
- UpPTS does not include data.
- the GP is a time domain for compensating for the reception delay in the downlink and the advance transmission in the uplink in the UE.
- a link direction for example, downlink, uplink
- a plurality of TDD uplink / downlink configurations that is, TDD configurations
- any one of the TDD configurations is used.
- TDD configurations a specific example of the TDD configuration will be described with reference to FIG.
- FIG. 2 is an explanatory diagram for explaining an example of a TDD configuration defined in 3GPP.
- the link directions of the subframes # 0 and # 5 are fixed to the downlink for transmission of a synchronization signal (Synchronization Signal) by the eNodeB.
- the link direction of the subframe # 2 is fixed to the uplink. Therefore, the subframe # 1 is a special subframe in any configuration.
- the link direction of the subframes # 3, # 4, # 7, # 8, and # 9 is either uplink or downlink.
- the subframe # 6 is a special subframe or a downlink subframe.
- the telecommunications carrier selects one TDD configuration from the seven TDD configurations and sets it fixedly.
- the eNodeB notifies the set TDD configuration in the system information block 1 (SIB1).
- a TDD configuration including more uplink subframes is selected.
- a TDD configuration including more downlink subframes is selected.
- TDD configuration is dynamically set for each cell in a short time.
- the TDD configuration is broadcast in SIB1.
- the information included in the SIB1 is updated at a cycle of about several hundred milliseconds (ms).
- the UE receives system information, it does not respond to the eNodeB, so the eNodeB cannot determine whether or not the UE has acquired new system information.
- the UE performs a random access procedure when establishing a connection with the eNodeB, such as initial connection establishment, connection re-establishment, handover, and uplink resynchronization.
- a random access procedure when establishing a connection with the eNodeB, such as initial connection establishment, connection re-establishment, handover, and uplink resynchronization.
- FIG. 3 is an explanatory diagram for explaining an example of a schematic flow of a random access procedure. It is assumed that the UE is synchronized with the downlink timing by cell search.
- step S91 the UE transmits a random access preamble.
- the eNodeB knows the existence of the UE and can estimate the delay between the UE and the eNodeB.
- step S93 the eNodeB transmits a random access response (Random Access Response) to the UE. At this time, the eNodeB transmits a timing advance for adjusting the transmission timing of the UE to the UE.
- a random access response Random Access Response
- step S95 the UE transmits an RRC connection request by RRC (Radio Resource Control) signaling.
- RRC Radio Resource Control
- step S97 the eNodeB transmits an RRC connection setup including cell setting information for establishing a connection by RRC signaling.
- Random access preamble (Random access preamble) -PRACH
- PRACH physical random access channel
- the eNodeB broadcasts the PRACH configuration index and the PRACH frequency offset in the system information block 2 (SIB2) so that the UE can know the radio resources used as the PRACH. And UE identifies the radio
- SIB2 system information block 2
- FIG. 4 is an explanatory diagram for explaining an example of radio resources used as PRACH.
- radio resources for one radio frame are shown.
- a radio resource 30 that covers one subframe (1 ms) in the time direction and six resource blocks (RB) in the frequency direction is used as the PRACH.
- ENodeB does not allocate radio resources used as PRACH to any UE. This is to prevent the random access preamble from becoming an interference source for communication between the UE and the eNodeB.
- a radio resource for transmitting a random access preamble (that is, a radio resource used as a PRACH) is also called a random access resource.
- FIG. 5 is an explanatory diagram for explaining an example of a format of a random access preamble.
- the random access preamble includes a cyclic prefix (CP) and a sequence.
- CP cyclic prefix
- the CP length is T CP
- the sequence length is T SEQ .
- FIG. 6 is an explanatory diagram for explaining examples of five formats of the random access preamble.
- CP length T CP and sequence length T SEQ of formats 0 to 5 of the random access preamble are shown.
- the CP length T CP and / or the sequence length T SEQ differ between formats.
- FIG. 7 is an explanatory diagram for explaining a preamble format for the PRACH configuration index.
- a preamble format for the RACH configuration index is shown. This is an excerpt of the table shown in Table 5.7.1-3 of 3GPP TS 36.211.
- the format of the random access preamble is determined from the PRACH configuration index.
- one radio resource (one resource block group) is used as a PRACH in one subframe. Which subframe in the 10 ms radio frame has the PRACH is determined by the PRACH configuration index. Also, which resource block group is PRACH in the frequency direction is calculated from the PRACH frequency offset.
- the number of uplink subframes per radio frame is smaller than in FDD. Therefore, in TDD, in order to secure the PRACH capacity, a plurality of radio resources (a plurality of resource block groups) can be used as a PRACH in one subframe.
- radio resources used as PRACH are defined for each PRACH configuration.
- FIG. 8 is an explanatory diagram for explaining an example of radio resources used as PRACH for each PRACH configuration.
- radio resources used as PRACH for each TDD configuration are shown. This is an excerpt from the table shown in Table 5.7.1-4 of 3GPP TS 36.211.
- Each radio resource used as PRACH is shown in the form of (f RA , t RA (0) , t RA (1) , t RA (2) ).
- t RA (0) is either 0, 1 or 2, and whether PRACH is in all radio frames, even number radio frames, or odd number radio frames.
- T RA (1) is 0 or 1, and indicates whether the PRACH is in the first half frame or the second half frame.
- t RA (2) indicates the number of uplink subframes based on the point at which the downlink switches to the uplink. Thus, it is specified which subframe has the PRACH.
- F RA indicates the frequency index of the resource block. Then, the f RA and PRACH frequency offset, which resource blocks in the frequency direction is used as the PRACH is specified.
- the PRACH position (resource block) in the frequency direction is calculated as follows.
- n PRB RA indicates a resource block in which the PRACH is located.
- N RB UL indicates the number of resource blocks in the frequency band.
- N PRB offset RA indicates a PRACH frequency offset.
- the PRACH position (resource block) in the frequency direction is calculated as follows.
- the radio resource used as the PRACH may change depending on the TDD configuration. Therefore, when dynamic TDD reconfiguration is adopted, the UE can transmit a random access preamble other than the PRACH if it cannot properly recognize the TDD configuration that is dynamically set.
- a legacy UE that does not have the capability for dynamic TDD reconfiguration cannot appropriately recognize a dynamically set TDD configuration, and can transmit a random access preamble other than the PRACH.
- the random access preamble transmitted by the legacy UE is not received by the eNodeB.
- Such concerns are disclosed in the non-patent literature "Media Tek Inc., Support for legacy UEs in adaptive TDD systems, 3GPP TSG-RAN1 # 72 Meeting, R1-130217, January 28th-February 1st, 2012" .
- the random access preamble transmitted by the legacy UE may become an interference source for communications involving other UEs.
- the embodiment according to the present disclosure makes it possible to suppress interference caused by the random access preamble when the TDD configuration is dynamically set.
- FIG. 9 is an explanatory diagram illustrating an example of a schematic configuration of the communication system 1 according to the embodiment of the present disclosure.
- the communication system 1 includes an eNodeB 100, a UE 20, and a UE 200.
- the communication system 1 is a system that complies with LTE, LTE-Advanced, or a communication standard equivalent thereto.
- the eNodeB 100 performs radio communication with the UE 20 and the UE 200 located in the cell 10.
- the eNodeB 100 performs wireless communication using TDD.
- the eNodeB 100 dynamically sets the TDD configuration and performs wireless communication according to the set TDD configuration. That is, the eNodeB 100 employs dynamic TDD reconfiguration.
- the eNodeB 100 notifies the set TDD configuration in the system information. Moreover, eNodeB100 notifies the said TDD configuration to UE200 by RRC signaling, when setting a TDD configuration newly.
- the UE 20 performs radio communication with the eNodeB 100 when located in the cell 10.
- the UE 20 is a UE that does not have the capability for downlink TDD reconfiguration.
- the UE 20 is also referred to as a legacy UE.
- the UE 20 when the TDD configuration is notified in the system information, the UE 20 performs wireless communication according to the TDD configuration.
- the UE 200 performs radio communication with the eNodeB 100 when located in the cell 10.
- UE 200 is a UE having capabilities for downlink TDD reconfiguration.
- the UE 200 is also referred to as a non-legacy UE.
- the UE 200 when the TDD configuration that is dynamically set is notified by RRC signaling, the UE 200 performs radio communication according to the TDD configuration.
- the first PRACH configuration index is notified, and the second PRACH configuration index is notified.
- the random access resource for each TDD configuration identified from the second PRACH configuration index includes the random access resource for any TDD configuration identified from the first PRACH configuration index. To do.
- FIG. 10 is a block diagram illustrating an example of a functional configuration of the eNodeB 100-1 according to the first embodiment.
- the eNodeB 100-1 includes an antenna unit 110, a radio communication unit 120, a network communication unit 130, a storage unit 140, and a processing unit 150.
- the antenna unit 110 receives a radio signal and outputs the received radio signal to the radio communication unit 120.
- the antenna unit 110 transmits the transmission signal output from the wireless communication unit 120.
- the radio communication unit 120 performs radio communication with the UE 20 and the UE 200 located in the cell 10.
- the wireless communication unit 120 performs wireless communication using TDD.
- the network communication unit 130 communicates with other communication nodes.
- the network communication unit 130 communicates with another eNodeB 100.
- the network communication unit 130 communicates with a communication node of the core network.
- the core network is an EPC (Evolved Packet Core)
- the communication node includes an MME (Mobility Management Entity), an S-GW (Serving Gateway), and the like.
- the storage unit 140 stores a program and data for the operation of the eNodeB 100.
- the processing unit 150 provides various functions of the eNodeB 100-1.
- the processing unit 150 includes an information acquisition unit 151 and a communication control unit 153.
- the information acquisition unit 151 acquires information necessary for control by the communication control unit 153. For example, the information acquisition unit 151 acquires information from another device via the wireless communication unit 120. For example, the information acquisition unit 151 acquires information stored in the storage unit 140.
- the information acquisition unit 151 acquires first information for identifying a random access resource for each of a plurality of TDD configurations. Further, the information acquisition unit 151 acquires second information for identifying a random access resource for each of the plurality of TDD configurations.
- the plurality of TDD configurations respectively represent link directions in units of subframes in a time division duplex (TDD) radio frame.
- the random access resource is a radio resource for transmitting a random access preamble (that is, a radio resource used as a PRACH).
- the first information and the second information are index information related to the configuration of the physical random access channel (PRACH). More specifically, the first information is a first PRACH configuration index, and the second information is a second PRACH configuration index. That is, the information acquisition unit 151 acquires the first PRACH configuration index and the second PRACH configuration index.
- PRACH configuration index is as described with reference to FIG.
- the resource for random access for each of the plurality of TDD configurations identified from the second information is identified from the first information.
- the random access resource for any of the plurality of TDD configurations is also included.
- the random access resource for each of the plurality of TDD configurations identified from the second PRACH configuration index is any of the plurality of TDD configurations identified from the first PRACH configuration index. It also includes resources for random access.
- FIG. 11 is an explanatory diagram for explaining an example of a combination of the first PRACH configuration index and the second PRACH configuration index according to the first embodiment.
- a PRACH configuration index 5 that is a first PRACH configuration index
- a PRACH configuration index 15 that is a second PRACH configuration index
- the resources for random access for TDD configurations 0 and 6 identified from the first PRACH configuration index are radio resources indicated by (0, 0, 0, 1) (radio in subframe # 3). Resource).
- the random access resource for TDD configurations 1 and 3 identified from the first PRACH configuration index is a radio resource indicated by (0, 0, 0, 0) (radio resource of subframe # 2). ).
- the random access resource for each of the TDD configurations 0, 1, 3, and 6 identified from the second PRACH configuration index is also the radio resource indicated by (0, 0, 0, 1) ( (0, 0, 0, 0) is also included.
- the random access resources for TDD configuration 0 identified from the second PRACH configuration index are (0, 0, 0, 0), (0, 0, 0, 1), (0, 0). , 0, 2), (0, 0, 1, 1) (0, 0, 1, 2).
- the resources for random access for each of the TDD configurations 0, 1, 3, 6 identified from the PRACH configuration index 15 are the TDD configurations 0, 1 identified from the PRACH configuration index 5.
- 3 and 6 include random access resources.
- the plurality of TDD configurations are a part of all TDD configurations. More specifically, for example, the plurality of TDD configurations do not include a TDD configuration that is not applied when the first information is broadcast. That is, the plurality of TDD configurations do not include a TDD configuration that is not applied when the first PRACH configuration index is broadcast.
- the plurality of TDD configurations include TDD configurations 0, 1, 3, and 6.
- the plurality of TDD configurations do not include the TDD configurations 2, 4, and 5 that are not applied when the PRACH configuration index 5 is broadcast (that is, N / A).
- the selection of the combination of the first PRACH configuration index and the second PRACH configuration index can be more flexible.
- the existing PRACH configuration index can be used as the first PRACH configuration index and the second PRACH configuration index.
- the communication control unit 153 controls wireless communication within the cell 10.
- the communication control unit 153 notifies the first information. Specifically, for example, the communication control unit 153 broadcasts the first PRACH configuration index.
- the communication control unit 153 notifies the second information. Specifically, for example, the communication control unit 153 notifies the second PRACH configuration index.
- the communication control unit 153 notifies the first information in the system information and notifies the second information by individual signaling. In addition, for example, the communication control unit 153 notifies the UE 200 that can perform wireless communication according to the dynamically set TDD configuration, with the second information by individual signaling.
- the communication control unit 153 reports the first PRACH configuration index in the system information (for example, SIB2). Further, the communication control unit 153 notifies the UE 200 having the capability for dynamic TDD reconfiguration of the second PRACH configuration index by RRC signaling.
- SIB2 system information
- the communication control unit 153 may notify the second information in the system information. More specifically, for example, the communication control unit 153 may also notify the second PRACH configuration index in the system information.
- the communication control unit 153 dynamically sets the TDD configuration.
- the communication control unit 153 sets any one of the plurality of TDD configurations. As an example, as illustrated in FIG. 11, when the first PRACH configuration index is 5, the communication control unit 153 changes the TDD configurations 0, 1, 3, and 6 according to changes in traffic conditions. Select one of the TDD configurations.
- the selected TDD configuration is a TDD configuration that is more suitable for traffic conditions. As an example, if there is more uplink traffic compared to downlink traffic, a TDD configuration with a higher percentage of uplink subframes is selected. As another example, if the downlink traffic is higher than the uplink traffic, a TDD configuration with a higher percentage of downlink subframes is selected. Then, the communication control unit 153 newly sets the selected TDD configuration.
- the communication control unit 153 notifies the TDD configuration to be set. More specifically, for example, the communication control unit 153 notifies the set TDD configuration in the SIB1.
- the communication control unit 153 notifies the set TDD configuration. More specifically, for example, when a TDD configuration is newly set, the communication control unit 153 notifies the UE 200 of the TDD configuration by RRC signaling before the TDD configuration is set.
- the TDD configuration is notified and notified.
- the timing for newly setting the TDD configuration in other words, the reconfiguration point
- the timing for notifying the newly set TDD configuration will be described.
- FIG. 12 is an explanatory diagram for explaining an example of a relationship between a new setting timing of the TDD configuration and a notification timing of the newly set TDD configuration.
- TDD configuration 0 is set up to radio frame # 5.
- a new TDD configuration 1 is set at a timing (reconfiguration point) between the radio frame # 5 and the radio frame # 6.
- the SIB1 including the information of the TDD configuration is updated with a period of the order of several hundred milliseconds (ms)
- the TDD configuration that has been set before i.e. TDD configuration 0
- the timing for acquiring broadcasted SIB1 information varies depending on the UE. Therefore, when a newly set TDD configuration is acquired from SIB1, the delay from the reconfiguration point to the timing when the newly set TDD configuration is acquired by the UE is several hundred milliseconds. This is an order delay.
- the UE 20 may misidentify the TDD configuration in a period after the reconfiguration point. Specifically, referring again to the example of FIG. 12, the UE 20 (legacy UE) misidentifies the TDD configuration that has been set at least during the radio frames # 6 to # 8 as the TDD configuration 0. On the other hand, since the UE 200 (non-legacy UE) is notified of the newly set TDD configuration (ie, TDD configuration 1) before the reconfiguration point, the UE 200 can correctly recognize the TDD configuration. .
- the communication control unit 153 controls radio resources.
- the communication control unit 153 is a resource for random access identified from the second information (second PRACH configuration index), and the above-described TDD configuration is set. Random access resources are used as PRACH. That is, the communication control unit 153 treats a signal received by the radio communication unit 120 with the random access resource identified from the second PRACH configuration index as a random access preamble from the UE.
- the communication control unit 153 allocates radio resources to UEs (UE 20 and UE 200). For example, the communication control unit 153 allocates PDSCH (Physical Downlink Shared Channel) radio resources of the downlink subframe to the UE according to the set TDD configuration. Moreover, the communication control part 153 allocates the radio
- PUSCH Physical Uplink Shared Channel
- TDD Configuration Settings and Random Access Resources For specific examples of TDD configuration settings and random access resources associated with the settings will be described with reference to FIG. 12 again.
- the PRACH configuration index 5 is broadcast in the system information and the PRACH configuration index 15 is notified to the UE 200 by signaling.
- the UE 200 (non-legacy UE) is notified in advance of the TDD configuration set at the reconfiguration point, it can correctly identify the resource for random access access. That is, the UE 200 reads (0, 0, 0, 0), (0, 0, 0, 1), (0, 0, 0, 2), (0, 0, 1, 1) from the PRACH configuration index 15. ) The radio resource indicated by (0, 0, 1, 2) is identified as a random access access resource. And since these radio
- UE 20 (legacy UE) misidentifies the TDD configuration set at least during radio frames # 6 to # 8 as TDD configuration 0. Therefore, the UE 20 is indicated by (0, 0, 0, 1) corresponding to TDD configuration 0, not the radio resource indicated by (0, 0, 0, 0) corresponding to TDD configuration 1.
- Wireless resources are identified as random access resources. However, as described above, the random access resource identified from the PRACH configuration index 15 and the random access resource for the TDD configuration 1 is the radio resource indicated by (0, 0, 0, 1). including. Therefore, the UE 20 can transmit the random access preamble using the PRACH while misidentifying the TDD configuration.
- the example shown in FIG. 12 is an example in which the TDD configuration is changed from TDD configuration 0 to TDD configuration 1, but the same result can be obtained by changing between any two TDD configurations.
- the legacy UE when a TDD configuration is newly set, even if the TDD configuration is misidentified by the legacy UE, the random access is identified by the legacy UE.
- the resource becomes the actual PRACH. Therefore, the legacy UE can transmit a random access preamble using PRACH. That is, it becomes possible to suppress the failure of the random access procedure by the legacy UE. As a result, the legacy UE does not repeatedly transmit the random access preamble, thereby suppressing an increase in overhead and power consumption.
- the random access preamble transmitted by the legacy UE becomes an interference source for communication involving other UEs. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- FIG. 13 is a block diagram illustrating an example of a functional configuration of the UE 200-1 according to the first embodiment.
- the UE 200-1 includes an antenna unit 210, a radio communication unit 220, a storage unit 230, an input unit 240, a display unit 250, and a processing unit 260.
- the antenna unit 210 receives a radio signal and outputs the received radio signal to the radio communication unit 220.
- the antenna unit 210 transmits the transmission signal output from the wireless communication unit 220.
- the radio communication unit 220 performs radio communication with the eNodeB 100 when the UE 200 is located in the cell 10.
- the wireless communication unit 220 performs wireless communication using TDD.
- the storage unit 230 stores a program and data for the operation of the UE 200.
- the input unit 240 receives input from the user of the UE 200. Then, the input unit 240 provides the input result to the processing unit 260.
- the display unit 250 displays an output screen (that is, an output image) from the UE 200.
- the display unit 250 displays an output screen in accordance with control by the processing unit 260 (display control unit 265).
- the processing unit 260 provides various functions of the UE 200-1.
- the processing unit 260 includes an information acquisition unit 261, a communication control unit 263, and a display control unit 265.
- the information acquisition unit 261 acquires information necessary for control by the communication control unit 263. For example, the information acquisition unit 261 acquires information from another device via the wireless communication unit 220. For example, the information acquisition unit 261 acquires information stored in the storage unit 230.
- the information acquisition unit 261 notifies the first information by the eNodeB 100-1 and notifies the second information by the eNodeB 100-1.
- the second information is acquired.
- the first PRACH configuration index is notified by the eNodeB 100-1
- the second PRACH configuration index is notified by the eNodeB 100-1.
- the information acquisition unit 261 acquires the second PRACH configuration index via the wireless communication unit 220.
- the information acquisition unit 261 also acquires the first information.
- the information acquisition unit 261 also acquires the first PRACH configuration index via the wireless communication unit 220.
- the information acquisition unit 261 acquires the information on the TDD configuration. More specifically, for example, when the eNodeB 100-1 notifies the UE 200-1 of the TDD configuration information through RRC signaling, the information acquisition unit 261 acquires the information of the TDD configuration.
- the information acquisition unit 261 acquires the information on the TDD configuration. More specifically, for example, when the eNodeB 100-1 broadcasts the SIB1 including the TDD configuration information, the information acquisition unit 261 acquires the TDD configuration information in the SIB1.
- the communication control unit 263 controls radio communication by the UE 200-1.
- the communication control unit 263 performs a random access procedure.
- the communication control unit 263 is a random access resource identified from the second information, and the above-described TDD configuration among the plurality of TDD configurations is set as described above. Perform random access procedures using resources for random access.
- the communication control unit 263 uses the resource for random access for the set TDD configuration identified from the second PRACH configuration index to the radio communication unit 220, Random access preamble is transmitted.
- the second PRACH configuration index is already notified to the UE 200-1, and the latest TDD configuration is notified to the UE 200-1.
- the communication control unit 263 causes the radio communication unit 220 to transmit a random access preamble using the random access resource identified from the second PRACH configuration index.
- the communication control unit 263 is a resource for random access identified from the first information, and the resource for random access for the notified TDD configuration among the plurality of TDD configurations is used. Use it to do random access procedures.
- the communication control unit 263 uses the random access resource for the broadcasted TDD configuration, which is identified from the first PRACH configuration index, to the wireless communication unit 220, and randomly Send the access preamble.
- the second PRACH configuration index has not been notified yet, or the latest TDD configuration has not been notified by the eNodeB 100-1.
- the communication control unit 263 causes the radio communication unit 220 to transmit a random access preamble using the random access resource identified from the first PRACH configuration index.
- the communication control unit 263 controls wireless communication according to the TDD configuration.
- the communication control unit 263 recognizes the TDD configuration from the acquired TDD configuration information, and controls wireless communication according to the TDD configuration.
- the communication control unit 263 causes the radio communication unit 220 to receive a signal in a downlink subframe and transmits a signal to the radio communication unit 220 in an uplink subframe according to the TDD configuration.
- the display control unit 265 controls display of the output screen by the display unit 250. For example, the display control unit 265 generates an output screen displayed by the display unit 250 and causes the display unit 250 to display the output screen.
- FIG. 14 is a flowchart illustrating an example of a schematic flow of the first communication control process on the eNodeB side according to the first embodiment.
- step S301 the information acquisition unit 151 acquires a first PRACH configuration index.
- step S303 the communication control unit 153 notifies the system information (SIB1) including the first PRACH configuration index via the wireless communication unit 120. Then, the process returns to step S301.
- SIB1 system information
- FIG. 15 is a flowchart illustrating an example of a schematic flow of the second communication control process on the eNodeB side according to the first embodiment.
- the second communication control process is executed, for example, when a UE is newly connected.
- step S321 the communication control unit 153 causes the radio communication unit 120 to transmit a capability inquiry about the dynamic TDD configuration to the UE.
- step S323 the communication control unit 153 acquires a response to the inquiry via the wireless communication unit 120.
- step S325 the communication control unit 153 determines whether the UE has the capability of dynamic TDD reconfiguration. If the UE has the capability, the process proceeds to step S327. Otherwise, the process ends.
- step S327 the information acquisition unit 151 acquires the second PRACH configuration index.
- step S329 the communication control unit 153 notifies the second PRACH configuration index by RRC signaling via the wireless communication unit 120. Then, the process ends.
- FIG. 16 is a flowchart illustrating an example of a schematic flow of communication control processing on the UE side according to the first embodiment. The communication control process is executed when a random access procedure is performed.
- step S401 the communication control unit 263 determines whether the second PRACH configuration index has already been notified. If the second PRACH configuration index has already been notified, the process proceeds to step S403. Otherwise, the process proceeds to step S409.
- step S403 the communication control unit 263 determines whether the latest TDD configuration has been notified. If the latest TDD configuration is notified, the process proceeds to step S405. Otherwise, the process proceeds to step S409.
- step S405 the information acquisition unit 261 acquires the second PRACH configuration index.
- step S407 the communication control unit 263 executes the random access access procedure using the random access resource for the set TDD configuration identified from the second PRACH configuration index. Then, the process ends.
- step S409 the information acquisition unit 261 acquires the first PRACH configuration index.
- step S411 the communication control unit 263 executes a random access access procedure using the random access resource for the broadcasted TDD configuration identified from the first PRACH configuration index. Then, the process ends.
- FIGS. 17A and 17B are sequence diagrams illustrating an example of a schematic flow of a communication control process between the eNodeB and the UE according to the first embodiment.
- the eNodeB 100-1 broadcasts the TDD configuration in the SIB1, and broadcasts the first PRACH configuration index in the SIB2 (S501). Then, the UE 200-1 starts wireless communication according to the notified TDD configuration. Further, the eNodeB 100-1 monitors the traffic (S505).
- the UE 200-1 transmits a random access preamble using a random access resource for the broadcasted TDD configuration identified from the broadcasted first PRACH configuration index (S507). Then, the eNodeB 100-1 transmits a response to the random access preamble (random access response) (S509). Further, the UE 200-1 transmits a connection request (for example, RRC connection request) (S511), and the eNodeB 100-1 transmits a connection permission (for example, RRC connection setup) (S513).
- a connection request for example, RRC connection request
- a connection permission for example, RRC connection setup
- the eNodeB 100-1 transmits a capability inquiry about dynamic TDD reconfiguration (S515). Then, the UE 200-1 transmits a response to the inquiry (information indicating that it has the capability) (S517).
- the eNodeB 100-1 transmits the second PRACH configuration index to the UE 200-1 by RRC signaling (S519), and the UE 200-1 transmits a response (S521).
- the eNodeB 100-1 determines to change the TDD configuration according to the traffic monitoring result (S531). Then, the eNodeB 100-1 notifies the UE 200-1 of the newly set TDD configuration by RRC signaling (S533), and the UE 200-1 transmits a response (S535).
- the eNodeB 100-1 newly sets a TDD configuration at the reconfiguration point (S537). Further, the UE 200-1 starts wireless communication according to the notified TDD configuration at the reconfiguration point (S539).
- the UE 200-1 starts a random access procedure, for example, for handover, reconnection, uplink resynchronization, and the like. Specifically, the UE 200-1 transmits a random access preamble using a random access resource for the notified TDD configuration identified from the notified second PRACH configuration index (S541). ). Then, the eNodeB 100-1 transmits a response (random access response) to the random access preamble (S543). Further, the UE 200-1 transmits a connection request (S545), and the eNodeB 100-1 transmits a connection permission (S547).
- a connection request S545
- the eNodeB 100-1 transmits a connection permission (S547).
- the first embodiment of the present disclosure has been described.
- the legacy UE when the TDD configuration is newly set, even if the TDD configuration is misidentified by the legacy UE, the resource for random access identified by the legacy UE become PRACH. Therefore, the legacy UE can transmit a random access preamble using PRACH. That is, it becomes possible to suppress the failure of the random access procedure by the legacy UE. As a result, the legacy UE does not repeatedly transmit the random access preamble, thereby suppressing an increase in overhead and power consumption.
- the random access preamble transmitted by the legacy UE becomes an interference source for communication involving other UEs. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- the first PRACH configuration index is broadcast.
- the resource for random access identified from the first PRACH configuration index is common among a plurality of TDD configurations.
- FIG. 18 is a block diagram illustrating an example of a functional configuration of the eNodeB 100-2 according to the second embodiment.
- the eNodeB 100-2 includes an antenna unit 110, a wireless communication unit 120, a network communication unit 130, a storage unit 140, and a processing unit 160.
- the antenna unit 110 the wireless communication unit 120, the network communication unit 130, and the storage unit 140, there is no difference between the first embodiment and the second embodiment. Therefore, only the processing unit 160 will be described here.
- the processing unit 160 provides various functions of the eNodeB 100-2.
- the processing unit 160 includes an information acquisition unit 161 and a communication control unit 163.
- the information acquisition unit 161 acquires information necessary for control by the communication control unit 163. For example, the information acquisition unit 161 acquires information from another device via the wireless communication unit 120. For example, the information acquisition unit 161 acquires information stored in the storage unit 140.
- the information acquisition unit 161 acquires first information for identifying a random access resource for each of a plurality of TDD configurations.
- the plurality of TDD configurations respectively represent link directions in units of subframes in a time division duplex (TDD) radio frame.
- the random access resource is a radio resource for transmitting a random access preamble (that is, a radio resource used as a PRACH).
- the first information is index information related to the configuration of the physical random access channel (PRACH). More specifically, the first information is a first PRACH configuration index. That is, the information acquisition unit 161 acquires the first PRACH configuration index.
- PRACH configuration index is as described with reference to FIG.
- the resource for random access identified from the first information is common among the plurality of TDD configurations.
- FIG. 19 is an explanatory diagram for describing a first example of the first PRACH configuration index according to the second embodiment.
- a PRACH configuration index 58 is shown as the first PRACH configuration index.
- the PRACH configuration index 58 is not an index already defined by 3GPP but an index newly provided.
- the resource for random access identified from the first PRACH configuration index is common among all TDD configurations. That is, the random access resources for any TDD configuration are the same radio resources indicated by (0, 0, 0, 0).
- the plurality of TDD configurations may be a part of all TDD configurations. More specifically, for example, the plurality of TDD configurations may not include a TDD configuration that is not applied when the first information is broadcast. That is, the plurality of TDD configurations may not include a TDD configuration that is not applied when the first PRACH configuration index is broadcast.
- the plurality of TDD configurations may not include a TDD configuration that is not applied when the first PRACH configuration index is broadcast.
- FIG. 20 is an explanatory diagram for describing a second example of the first PRACH configuration index according to the second embodiment.
- a PRACH configuration index 43 is shown as the first PRACH configuration index.
- the PRACH configuration index 43 is an index already determined by 3GPP.
- the resource for random access identified from the first PRACH configuration index is common among some TDD configurations (that is, TDD configurations 0, 3, and 6) among all TDD configurations. is there. That is, the random access resource for any TDD configuration of some TDD configurations (ie, TDD configurations 0, 3, 6) is the same radio resource indicated by (0, 0, 0, 0) It is.
- the part of the TDD configurations are not applied when the PRACH configuration index 43 is broadcast (that is, N / A), and do not include the TDD configurations 1, 2, 4, and 5.
- the selection of the first PRACH configuration index can be more flexible.
- an existing PRACH configuration index can be used as the first PRACH configuration index.
- the communication control unit 163 controls wireless communication within the cell 10.
- the communication control unit 163 notifies the first information. Specifically, for example, the communication control unit 163 broadcasts the first PRACH configuration index.
- the communication control unit 163 notifies the first information in the system information. More specifically, for example, the communication control unit 163 broadcasts the first PRACH configuration index in the system information (for example, SIB2).
- SIB2 system information
- the communication control unit 163 is similar to the communication control unit 153 according to the first embodiment. Operate.
- the communication control unit 163 controls radio resources.
- the communication control unit 163 is a resource for random access identified from the first information (first PRACH configuration index), and the above-described TDD configuration is set. Random access resources are used as PRACH. That is, the communication control unit 163 treats a signal received by the radio communication unit 120 with the random access resource identified from the first PRACH configuration index as a random access preamble from the UE.
- the communication control unit 163 operates in the same manner as the communication control unit 153 according to the first embodiment.
- UE 20 (legacy UE) misidentifies the TDD configuration set at least during radio frames # 6 to # 8 as TDD configuration 0.
- the random access resource for any TDD configuration identified from the PRACH configuration 58 is a radio resource indicated by (0, 0, 0, 0). Therefore, the UE 20 can transmit the random access preamble using the PRACH while misidentifying the TDD configuration.
- the UE 200 (non-legacy UE) transmits a random access preamble using the PRACH while correctly recognizing the TDD configuration.
- the PRACH (the PRACH corresponding to the broadcast PRACH configuration index) is maintained. Therefore, even if the legacy UE misidentifies the TDD configuration, it can transmit the random access preamble using the PRACH. That is, it becomes possible to suppress the failure of the random access procedure by the legacy UE. As a result, the legacy UE does not repeatedly transmit the random access preamble, thereby suppressing an increase in overhead and power consumption.
- the random access preamble transmitted by the legacy UE becomes an interference source for communication involving other UEs. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- FIG. 21 is a block diagram illustrating an example of a functional configuration of the UE 200-2 according to the second embodiment.
- the UE 200-2 includes an antenna unit 210, a radio communication unit 220, a storage unit 230, an input unit 240, a display unit 250, and a processing unit 270.
- the information acquisition unit 271 acquires information necessary for control by the communication control unit 273. For example, the information acquisition unit 271 acquires information from other devices via the wireless communication unit 220. For example, the information acquisition unit 271 acquires information stored in the storage unit 230.
- the information acquisition unit 271 acquires the first information when the first information is broadcast by the eNodeB 100-2.
- the first PRACH configuration index is broadcast by the eNodeB 100-2.
- the information acquisition unit 271 acquires the first PRACH configuration index via the wireless communication unit 220.
- the information acquisition unit 271 operates in the same manner as the information acquisition unit 261 according to the first embodiment.
- the communication control unit 273 controls radio communication performed by the UE 200-2.
- the communication control unit 273 performs a random access procedure.
- the communication control unit 273 is a random access resource identified from the first information, and is set (or notified) from among the plurality of TDD configurations.
- the random access procedure is performed using the random access resource for the TDD configuration.
- the communication control unit 273 uses the wireless communication unit 220 for random access with respect to the set (or broadcast) TDD configuration identified from the first PRACH configuration index.
- a resource is used to transmit a random access preamble.
- the communication control unit 273 operates in the same manner as the communication control unit 263 according to the first embodiment.
- the communication control processing on the eNodeB side according to the second embodiment is the eNodeB side according to the first embodiment described with reference to FIG. 14 except that the contents of the first PRACH configuration index are different. This is the same as the first communication control process.
- FIG. 22 is a flowchart illustrating an example of a schematic flow of communication control processing on the UE side according to the second embodiment.
- the communication control process is executed when a random access procedure is performed.
- step S421 the information acquisition unit 271 acquires the first PRACH configuration index.
- step S423 the communication control unit 273 uses the random access resource for the configured (or broadcasted) TDD configuration identified from the first PRACH configuration index, and performs a random access access procedure. I do. Then, the process ends.
- FIGS. 23A and 23B are sequence diagrams illustrating an example of a schematic flow of a communication control process between the eNodeB and the UE according to the second embodiment.
- steps S601 to S617 according to the second embodiment shown in FIG. 23A are the same as those in the first embodiment described with reference to FIG. 17A except that the contents of the first PRACH configuration index are different. This is the same as steps S501 to S517. Also, steps S631 to S639, S645, and S647 according to the second embodiment shown in FIG. 23B are the same as steps S531 to S539, S545, and S547 according to the first embodiment described with reference to FIG. 17B. It is. Therefore, steps S641 and S643 according to the second embodiment shown in FIG. 23B will be described here.
- the UE 200-2 starts a random access procedure, for example, for handover, reconnection, uplink resynchronization, and the like. Specifically, the UE 200-2 transmits a random access preamble using a random access resource for the notified TDD configuration identified from the notified first PRACH configuration index (S641). ). Then, the eNodeB 100-2 transmits a response (random access response) to the random access preamble (S643).
- the second PRACH configuration index is notified in addition to the notification of the first PRACH configuration index.
- UE200 non-legacy UE performs a random access procedure using the resource for random access about the set TDD configuration identified from the 2nd PRACH configuration index.
- the information acquisition unit 161 further includes second information for identifying a random access resource for each of the plurality of TDD configurations. get.
- the second information is a second PRACH configuration index.
- the second PRACH configuration index is an arbitrary PRACH configuration index.
- FIG. 24 is an explanatory diagram for explaining an example of a combination of the first PRACH configuration index and the second PRACH configuration index according to a modification of the second embodiment.
- a PRACH configuration index 58 is shown as the first PRACH configuration index. This is as described above with reference to FIG.
- the PRACH configuration index 15 is shown as the second PRACH configuration index.
- the second PRACH configuration index is PRACH configuration index 15 in this example, but may be any PRACH configuration index. Thus, an arbitrary PRACH configuration index can be selected as the second PRACH configuration index.
- the communication control unit 163 notifies the second information. Specifically, for example, the communication control unit 163 notifies the second PRACH configuration index.
- the communication control unit 163 notifies the second information by individual signaling.
- the communication control unit 153 notifies the UE 200 that can perform wireless communication according to the dynamically set TDD configuration, with the second information by individual signaling. More specifically, for example, the communication control unit 163 notifies the UE 200 having the capability for dynamic TDD reconfiguration of the second PRACH configuration index by RRC signaling.
- the communication control unit 163 may notify the second information in the system information. More specifically, for example, the communication control unit 163 may also notify the second PRACH configuration index in the system information.
- the communication control unit 163 is a random access resource identified from the second information (second PRACH configuration index), and is set to a TDD configuration.
- the above random access resource is also used as PRACH. That is, the communication control unit 163 further handles a signal received by the radio communication unit 120 with the random access resource identified from the second PRACH configuration index as a random access preamble from the UE.
- the information acquisition unit 271 notifies the first information by the eNodeB 100-2 and notifies the second information by the eNodeB 100-2.
- the second information is acquired.
- the first PRACH configuration index is notified by the eNodeB 100-2
- the second PRACH configuration index is notified by the eNodeB 100-2.
- the information acquisition unit 271 acquires the second PRACH configuration index via the wireless communication unit 220.
- the information acquisition unit 271 also acquires the first information.
- the information acquisition unit 261 also acquires the first PRACH configuration index via the wireless communication unit 220.
- the communication control unit 273 is a random access resource identified from the second information, and is set in the plurality of TDD configurations. A random access procedure is performed using the random access resource for the TDD configuration that is present.
- the communication control unit 273 uses the random access resource for the set TDD configuration identified from the second PRACH configuration index to the wireless communication unit 220, Random access preamble is transmitted.
- the second PRACH configuration index is already notified to the UE 200-2, and the latest TDD configuration is notified to the UE 200-2.
- the communication control unit 273 causes the radio communication unit 220 to transmit a random access preamble using the random access resource identified from the second PRACH configuration index.
- the communication control unit 273 is a resource for random access identified from the first information, and the resource for random access for the notified TDD configuration among the plurality of TDD configurations is used. Use it to do random access procedures.
- the communication control unit 273 uses the random access resource for the notified TDD configuration, which is identified from the first PRACH configuration index, to the wireless communication unit 220, and randomly Send the access preamble.
- the second PRACH configuration index has not been notified yet, or the latest TDD configuration has not been notified by the eNodeB 100-2.
- the communication control unit 273 causes the wireless communication unit 220 to transmit a random access preamble using the random access resource identified from the first PRACH configuration index.
- the communication control process on the eNodeB side according to the modification of the second embodiment is the same as the eNodeB according to the first embodiment described with reference to FIGS. 14 and 15 except that the contents of the PRACH configuration index are different. This is the same as the communication control processing on the side.
- the UE side communication control process according to the modification of the second embodiment is the UE side according to the first embodiment described with reference to FIG. 16 except that the content of the PRACH configuration index is different. This is the same as the communication control process.
- the communication control process between the eNodeB and the UE according to the modification of the second embodiment is the first implementation described with reference to FIGS. 17A and 17B except that the contents of the PRACH configuration index are different. It is the same as the communication control process between eNodeB and UE which concerns on a form.
- the PRACH for the UE 200 can be prepared more freely.
- the second embodiment of the present disclosure has been described.
- the PRACH (the PRACH corresponding to the broadcast PRACH configuration index) is maintained. Therefore, even if the legacy UE misidentifies the TDD configuration, it can transmit the random access preamble using the PRACH. That is, it becomes possible to suppress the failure of the random access procedure by the legacy UE. As a result, the legacy UE does not repeatedly transmit the random access preamble, thereby suppressing an increase in overhead and power consumption.
- the random access preamble transmitted by the legacy UE becomes an interference source for communication involving other UEs. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- the first PRACH configuration index is broadcast.
- the random access resource identified from the first PRACH configuration index is an uplink resource when any of a plurality of TDD configurations is set.
- FIG. 25 is a block diagram illustrating an example of a functional configuration of the eNodeB 100-3 according to the third embodiment.
- the eNodeB 100-3 includes an antenna unit 110, a radio communication unit 120, a network communication unit 130, a storage unit 140, and a processing unit 170.
- the antenna unit 110 the wireless communication unit 120, the network communication unit 130, and the storage unit 140, there is no difference between the second embodiment (or the first embodiment) and the third embodiment. Therefore, only the processing unit 170 will be described here.
- the processing unit 170 provides various functions of the eNodeB 100-3.
- the processing unit 170 includes an information acquisition unit 171 and a communication control unit 173.
- the information acquisition unit 171 acquires information necessary for control by the communication control unit 173. For example, the information acquisition unit 171 acquires information from other devices via the wireless communication unit 120. For example, the information acquisition unit 171 acquires information stored in the storage unit 140.
- the information acquisition unit 171 operates in the same manner as the information acquisition unit 161 according to the second embodiment. For example, the information acquisition unit 171 acquires the first PRACH configuration index.
- the resource for random access for each of the plurality of TDD configurations identified from the first information is the plurality of TDD configurations. Even if any of these is set, it is an uplink resource.
- the resource for random access for each of the plurality of TDD configurations identified from the first information is the plurality of TDD configurations. Even if any of these is set, it is an uplink resource.
- FIG. 26 is an explanatory diagram for explaining an example of the first PRACH configuration index according to the third embodiment.
- the PRACH configuration index 5 is shown as the first PRACH configuration index.
- the random access resources for the TDD configurations 0 and 6 identified from the first PRACH configuration index are radio resources indicated by (0, 0, 0, 1) (radio in subframe # 3). Resource).
- subframe # 3 is an uplink subframe in any of a plurality of TDD configurations (here, TDD configurations 0, 1, 3, and 6).
- the random access resource for TDD configurations 1 and 3 identified from the first PRACH configuration index is a radio resource indicated by (0, 0, 0, 0) (radio resource of subframe # 2 ).
- FIG. 26 the random access resources for the TDD configurations 0 and 6 identified from the first PRACH configuration index.
- subframe # 2 is an uplink subframe.
- any of the TDD configurations 0, 1, 3, and 6 is set as the random access resource for each of the TDD configurations 0, 1, 3, and 6 that is identified from the first PRACH configuration index. Is also an uplink resource.
- the plurality of TDD configurations are a part of all TDD configurations. More specifically, for example, the plurality of TDD configurations do not include a TDD configuration that is not applied when the first information is broadcast. That is, the plurality of TDD configurations do not include a TDD configuration that is not applied when the first PRACH configuration index is broadcast.
- the plurality of TDD configurations include TDD configurations 0, 1, 3, and 6.
- the plurality of TDD configurations do not include the TDD configurations 2, 4, and 5 that are not applied when the PRACH configuration index 5 is broadcast (that is, N / A).
- the selection of the first PRACH configuration index can be more flexible.
- an existing PRACH configuration index can be used as the first PRACH configuration index.
- the communication control unit 173 controls wireless communication within the cell 10.
- the communication control unit 173 operates in the same manner as the communication control unit 163 according to the second embodiment.
- the communication control unit 173 is similar to the communication control unit 163 according to the second embodiment. Operate.
- the communication control unit 173 controls radio resources.
- the communication control unit 173 determines whether each of the plurality of TDD configurations is identified from the first information, regardless of which of the plurality of TDD configurations is set. Random access resources are used as random access channels. That is, the communication control unit 173 treats a signal received by the radio communication unit 120 with any random access resource identified from the first PRACH configuration index as a random access preamble from the UE.
- the communication control unit 173 operates in the same manner as the communication control unit 163 according to the second embodiment.
- the PRACH configuration index 5 is reported in the system information.
- UE 20 (legacy UE) misidentifies the TDD configuration set at least during radio frames # 6 to # 8 as TDD configuration 0.
- the radio resource indicated by (0, 0, 0, 0) and the radio indicated by (0, 0, 0, 1) Both resources are used as PRACH. Therefore, the UE 20 can transmit the random access preamble using the PRACH while misidentifying the TDD configuration.
- the UE 200 (non-legacy UE) transmits a random access preamble using the PRACH while correctly recognizing the TDD configuration.
- the resource for random access for each TDD configuration identified from the broadcast PRACH configuration index is independent of the set TDD configuration. It can always be used as PRACH. Therefore, even if the legacy UE misidentifies the TDD configuration, it can transmit the random access preamble using the PRACH. That is, it becomes possible to suppress the failure of the random access procedure by the legacy UE. As a result, the legacy UE does not repeatedly transmit the random access preamble, thereby suppressing an increase in overhead and power consumption.
- the random access preamble transmitted by the legacy UE becomes an interference source for communication involving other UEs. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- the functional configuration of the UE 200-3 according to the third embodiment is the same as the functional configuration of the UE 200-2 according to the second embodiment.
- the difference between 3rd Embodiment and 2nd Embodiment is only the content of the 1st information (1st PRACH configuration index) alert
- the communication control process on the eNodeB side according to the third embodiment is the same as the communication control process (or FIG. 14) on the eNodeB side according to the second embodiment except that the contents of the first PRACH configuration index are different. This is the same as the first communication control process on the eNodeB side according to the first embodiment described with reference to FIG.
- the UE side communication control processing according to the third embodiment is the UE side according to the second embodiment described with reference to FIG. 22 except that the content of the first PRACH configuration index is different. This is the same as the communication control process.
- the second PRACH configuration index is notified in addition to the notification of the first PRACH configuration index.
- UE200 non-legacy UE performs a random access procedure using the resource for random access about the set TDD configuration identified from the 2nd PRACH configuration index.
- the information acquisition unit 171 further includes second information for identifying a random access resource for each of the plurality of TDD configurations. get.
- the second information is a second PRACH configuration index.
- the second PRACH configuration index is an arbitrary PRACH configuration index.
- FIG. 27 is an explanatory diagram for explaining an example of a combination of the first PRACH configuration index and the second PRACH configuration index according to a modification of the third embodiment.
- a PRACH configuration index 5 is shown as the first PRACH configuration index.
- the PRACH configuration index 12 is shown as the second PRACH configuration index.
- the second PRACH configuration index is PRACH configuration index 12 in this example, but may be any PRACH configuration index. Thus, an arbitrary PRACH configuration index can be selected as the second PRACH configuration index.
- the communication control unit 173 operates in the same manner as the communication control unit 163 according to the modification of the second embodiment.
- the communication control unit 173 is a random access resource identified from the second information (second PRACH configuration index), and is set to a TDD configuration.
- the above random access resource is also used as PRACH. That is, the communication control unit 163 further handles a signal received by the radio communication unit 120 with the random access resource identified from the second PRACH configuration index as a random access preamble from the UE.
- the functional configuration of the UE 200-3 according to the modified example of the third embodiment is the same as the functional configuration of the UE 200-2 according to the modified example of the second embodiment.
- the difference between the modification of 3rd Embodiment and the modification of 2nd Embodiment is alert
- the communication control process on the eNodeB side according to the modification of the third embodiment is the same as the communication control process on the eNodeB side according to the modification of the second embodiment except that the contents of the PRACH configuration index are different (or This is the same as the communication control process on the eNodeB side according to the first embodiment described with reference to FIGS. 14 and 15.
- the UE-side communication control process according to the modification of the third embodiment is different from the UE-side communication control process according to the modification of the second embodiment (except that the contents of the PRACH configuration index are different). Or, it is the same as the UE-side communication control process according to the first embodiment described with reference to FIG.
- the communication control process between the eNodeB and the UE according to the modification of the third embodiment is performed between the eNodeB and the UE according to the modification of the second embodiment, except that the contents of the PRACH configuration index are different. This is the same as the communication control process (or the communication control process between the eNodeB and the UE according to the first embodiment described with reference to FIGS. 17A and 17B).
- the PRACH for UE 200 (non-legacy UE) can be prepared more freely.
- the third embodiment of the present disclosure has been described.
- the random access resource for each TDD configuration identified from the broadcast PRACH configuration index is always used as the PRACH regardless of the set TDD configuration. obtain. Therefore, even if the legacy UE misidentifies the TDD configuration, it can transmit the random access preamble using the PRACH. That is, it becomes possible to suppress the failure of the random access procedure by the legacy UE. As a result, the legacy UE does not repeatedly transmit the random access preamble, thereby suppressing an increase in overhead and power consumption.
- the random access preamble transmitted by the legacy UE becomes an interference source for communication involving other UEs. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- a line-dam access for the previous TDD configuration that was set before the newly set TDD configuration is performed.
- the resource for use is not assigned to any terminal device.
- FIG. 28 is a block diagram illustrating an example of a functional configuration of the eNodeB 100-4 according to the fourth embodiment.
- the eNodeB 100-4 includes an antenna unit 110, a radio communication unit 120, a network communication unit 130, a storage unit 140, and a processing unit 180.
- the antenna unit 110, the wireless communication unit 120, the network communication unit 130, and the storage unit 140 are the same as those in the second embodiment (or the third embodiment or the first embodiment) and the fourth embodiment. There is no difference between. Therefore, only the processing unit 180 will be described here.
- the processing unit 180 provides various functions of the eNodeB 100-4.
- the processing unit 180 includes an information acquisition unit 181 and a communication control unit 183.
- the information acquisition unit 181 acquires information necessary for control by the communication control unit 183. For example, the information acquisition unit 181 acquires information from another device via the wireless communication unit 120. For example, the information acquisition unit 181 acquires information stored in the storage unit 140.
- the information acquisition unit 181 operates in the same manner as the information acquisition unit 161 according to the second embodiment. For example, the information acquisition unit 181 acquires the first PRACH configuration index.
- the first PRACH configuration index is an arbitrary PRACH configuration index.
- a specific example of the first PRACH configuration will be described with reference to FIG.
- FIG. 29 is an explanatory diagram for describing an example of a first PRACH configuration index according to the fourth embodiment.
- the PRACH configuration index 0 is shown as the first PRACH configuration index.
- any PRACH configuration index defined by 3GPP as described with reference to FIG. 8 is acquired as the first PRACH configuration index.
- the PRACH configuration index 0 is an example of a first PRACH configuration index.
- the first PRACH configuration index may be another PRACH configuration index.
- the information acquisition unit 181 acquires random access resource information for a set TDD configuration among a plurality of TDD configurations.
- the plurality of TDD configurations respectively represent link directions in units of subframes in a time division duplex (TDD) radio frame.
- the random access resource is a radio resource for transmitting a random access preamble (that is, a radio resource used as a PRACH).
- the information acquisition unit 181 acquires information on random access resources for the set TDD configuration identified from the first PRACH configuration index. Specifically, for example, referring again to the example of FIG. 29, when the PRACH configuration index 0 is broadcast and the TDD configuration 2 is set, the information acquisition unit 181 uses the random access resource information as information. , (0, 1, 0, 0) is acquired. For example, when the TDD configuration 3 is newly set, the information acquisition unit 181 acquires information on radio resources indicated by (0, 1, 0, 2) as information on random access resources.
- the communication control unit 183 controls wireless communication within the cell 10.
- the communication control unit 183 operates in the same manner as the communication control unit 163 according to the second embodiment.
- the communication control unit 183 is similar to the communication control unit 163 according to the second embodiment. Operate.
- the communication control unit 183 controls radio resources.
- the communication control unit 183 operates in the same manner as the communication control unit 163 according to the second embodiment.
- the communication control unit 183 allocates radio resources to UEs (UE 20 and UE 200). For example, the communication control unit 183 allocates the PDSCH radio resource of the downlink subframe to the UE according to the set TDD configuration. Moreover, the communication control part 153 allocates the radio
- the communication control unit 183 determines the previous TDD configuration that was set before the newly set TDD configuration. Are not allocated to any UE.
- the first PRACH configuration index is PRACH configuration index 0.
- TDD configuration 2 is set, and then TDD configuration 3 is set.
- the communication control unit 183 selects a random access resource (that is, a radio resource indicated by (0, 1, 0, 0)) for the previous TDD configuration (that is, TDD configuration 2). Not assigned to any UE.
- the radio resources that can transmit the random access preamble by the legacy UE are , Not assigned to any UE. Therefore, it can suppress that the random access preamble transmitted by the legacy UE becomes an interference source for communication involving other UEs. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- the communication control unit 183 does not allocate line dumb access resources for the previous TDD configuration to any UE during a predetermined period.
- the UE 20 when the TDD configuration is newly set, the UE 20 (legacy UE) changes the set TDD configuration to the TDD at least during the radio frames # 6 to # 8. Misidentified as configuration 0. Therefore, communication control section 183 does not allocate any random access resource for the previous TDD configuration to any UE for at least a predetermined period longer than the period of radio frames # 6 to # 8. .
- FIG. 30 is a flowchart illustrating an example of a schematic flow of communication control processing on the eNodeB side according to the fourth embodiment.
- step S701 the communication control unit 183 determines whether a TDD configuration is newly set. If the TDD configuration is newly set, the process proceeds to step S703. Otherwise, the process proceeds to step S707.
- step S703 the communication control unit 183 allocates radio resources excluding random access resources for the previous TDD configuration to the UE.
- step S705 the communication control unit 183 determines whether a predetermined period has elapsed after the TDD configuration is newly set. If the predetermined period has elapsed, the process returns to step S701. Otherwise, the process returns to step S703.
- step S707 the communication control unit 183 allocates radio resources to the UE.
- the fourth embodiment has been described above. According to the fourth embodiment, for example, even if the TDD configuration is newly set and the legacy UE misidentifies the TDD configuration, the radio resource to which the random access preamble can be transmitted by the legacy UE is transmitted to any UE. Also not assigned. Therefore, it can suppress that the random access preamble transmitted by the legacy UE becomes an interference source for communication involving other UEs. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- a random access procedure by the UE is prohibited for a predetermined period.
- FIG. 31 is a block diagram illustrating an example of a functional configuration of the eNodeB 100-5 according to the fifth embodiment.
- the eNodeB 100-5 includes an antenna unit 110, a radio communication unit 120, a network communication unit 130, a storage unit 140, and a processing unit 190.
- the antenna unit 110, the wireless communication unit 120, the network communication unit 130, and the storage unit 140 are the same as those in the fourth embodiment (or the first embodiment, the second embodiment, or the third embodiment). There is no difference from the fifth embodiment. Therefore, only the processing unit 190 will be described here.
- the processing unit 190 provides various functions of the eNodeB 100-5.
- the processing unit 190 includes an information acquisition unit 191 and a communication control unit 193.
- the information acquisition unit 191 acquires information necessary for control by the communication control unit 193. For example, the information acquisition unit 191 acquires information from another device via the wireless communication unit 120. For example, the information acquisition unit 191 acquires information stored in the storage unit 140.
- the information acquisition unit 191 acquires information on a new setting of the TDD configuration.
- the information is information indicating that a TDD configuration is newly set.
- the TDD configuration represents the link direction in units of subframes in a time division duplex (TDD) radio frame.
- TDD time division duplex
- the information acquisition unit 191 For acquisition of the PRACH configuration index, the information acquisition unit 191 operates in the same manner as the information acquisition unit 181 according to the fourth embodiment. For example, the information acquisition unit 191 acquires the first PRACH configuration index.
- the contents of the first PRACH configuration index are the same as those in the fourth embodiment. That is, the first PRACH configuration index is an arbitrary PRACH configuration index.
- the communication control unit 193 controls wireless communication within the cell 10.
- the communication control unit 193 prohibits a random access procedure by the UE for a predetermined period when a TDD configuration is newly set.
- the communication control unit 193 prohibits the random access procedure by reporting information for prohibiting the random access procedure in the system information. More specifically, for example, the information for prohibiting the random access procedure is access class barring information broadcast in the SIB2.
- the access class burring information includes a burring factor (Barring Factor) and a burring time (Barring Time).
- the burring factor is information for controlling the probability that the UE is prohibited from accessing
- the burring time is information indicating a period during which the UE is prohibited from attempting access.
- the communication control unit 193 prohibits the random access procedure by the UE by setting and reporting the access barring information to an appropriate value during a predetermined period before and after the change of the TDD configuration.
- the UE 20 when the TDD configuration is newly set, the UE 20 (legacy UE) changes the set TDD configuration to the TDD at least during the radio frames # 6 to # 8. Misidentified as configuration 0.
- the communication control unit 193 prohibits the random access procedure by the UE for at least a predetermined period longer than the period of the radio frames # 6 to # 8.
- the random access preamble is not transmitted by the UE during a predetermined period. Therefore, even if the legacy UE misidentifies the TDD configuration, interference due to the random access preamble does not occur. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- the communication control unit 193 operates in the same manner as the communication control unit 183 according to the fourth embodiment.
- the communication control unit 193 is the same as the communication control unit 183 according to the fourth embodiment. Operate.
- the communication control unit 193 controls radio resources.
- the communication control unit 193 operates in the same manner as the communication control unit 183 according to the fourth embodiment.
- the communication control unit 193 allocates radio resources to UEs (UE 20 and UE 200). For example, the communication control unit 193 allocates the PDSCH radio resource of the downlink subframe to the UE according to the set TDD configuration. Moreover, the communication control part 193 allocates the radio
- FIG. 32 is a flowchart illustrating an example of a schematic flow of communication control processing on the eNodeB side according to the fifth embodiment.
- step S751 the communication control unit 193 notifies system information (SIB2) including access burring information.
- SIB2 system information
- the initial value of the access barring information is set so as not to prohibit access of the UE.
- step S753 the communication control unit 193 determines whether a TDD configuration is newly set. If the TDD configuration is newly set, the process proceeds to step S755. Otherwise, the process returns to step S751.
- step S755 the communication control unit 193 sets access burring information so as to prohibit access of the UE.
- step S757 the communication control unit 193 notifies system information (SIB2) including access burring information.
- SIB2 system information
- step S759 the communication control unit 183 determines whether a predetermined period has elapsed. If the predetermined period has elapsed, the process proceeds to step S761. Otherwise, the process returns to step S757.
- step S761 the communication control unit 193 sets access burring information so as not to prohibit access of the UE. Then, the process returns to step S751.
- the fifth embodiment has been described above. According to the fifth embodiment, for example, when a TDD configuration is newly set, the random access preamble is not transmitted by the UE during a predetermined period. Therefore, even if the legacy UE misidentifies the TDD configuration, interference due to the random access preamble does not occur. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- the eNodeB 100 may be realized as any kind of eNodeB (evolved Node B) such as a macro eNodeB or a small eNodeB.
- a small eNodeB may be an eNodeB that covers a smaller cell than a macro cell, such as a pico eNodeB, a micro eNodeB, or a home (femto) eNodeB.
- the eNodeB 100 may include a main body (also referred to as a base station apparatus) that controls radio communication and one or more RRHs (Remote Radio Heads) that are arranged at locations different from the main body.
- RRHs Remote Radio Heads
- various types of terminals to be described later may operate as the eNodeB 100 by temporarily or semi-permanently executing the base station function.
- the UE 200 is realized as a mobile terminal such as a smartphone, a tablet PC (Personal Computer), a notebook PC, a portable game terminal, a portable / dongle type mobile router or a digital camera, or an in-vehicle terminal such as a car navigation device. May be.
- the UE 200 may be realized as a terminal (also referred to as an MTC (Machine Type Communication) terminal) that performs M2M (Machine To Machine) communication.
- MTC Machine Type Communication
- M2M Machine To Machine
- at least some components of the UE 200 may be realized as a module (for example, an integrated circuit module configured by one die) mounted on these terminals.
- FIG. 33 is a block diagram illustrating a first example of a schematic configuration of an eNB to which the technology according to the present disclosure may be applied.
- the eNB 800 includes one or more antennas 810 and a base station device 820. Each antenna 810 and the base station apparatus 820 can be connected to each other via an RF cable.
- Each of the antennas 810 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission and reception of radio signals by the base station apparatus 820.
- the eNB 800 includes a plurality of antennas 810 as illustrated in FIG. 33, and the plurality of antennas 810 may respectively correspond to a plurality of frequency bands used by the eNB 800, for example. Note that although FIG. 33 illustrates an example in which the eNB 800 includes a plurality of antennas 810, the eNB 800 may include a single antenna 810.
- the base station apparatus 820 includes a controller 821, a memory 822, a network interface 823, and a wireless communication interface 825.
- the controller 821 may be a CPU or a DSP, for example, and operates various functions of the upper layer of the base station apparatus 820. For example, the controller 821 generates a data packet from the data in the signal processed by the wireless communication interface 825, and transfers the generated packet via the network interface 823. The controller 821 may generate a bundled packet by bundling data from a plurality of baseband processors, and may transfer the generated bundled packet. In addition, the controller 821 is a logic that executes control such as radio resource control, radio bearer control, mobility management, inflow control, or scheduling. May have a typical function. Moreover, the said control may be performed in cooperation with a surrounding eNB or a core network node.
- the memory 822 includes RAM and ROM, and stores programs executed by the controller 821 and various control data (for example, terminal list, transmission power data, scheduling data, and the like).
- the network interface 823 is a communication interface for connecting the base station device 820 to the core network 824.
- the controller 821 may communicate with the core network node or other eNB via the network interface 823.
- the eNB 800 and the core network node or another eNB may be connected to each other by a logical interface (for example, an S1 interface or an X2 interface).
- the network interface 823 may be a wired communication interface or a wireless communication interface for wireless backhaul.
- the network interface 823 may use a frequency band higher than the frequency band used by the wireless communication interface 825 for wireless communication.
- the wireless communication interface 825 supports any cellular communication scheme such as LTE (Long Term Evolution) or LTE-Advanced, and provides a wireless connection to terminals located in the cell of the eNB 800 via the antenna 810.
- the wireless communication interface 825 may typically include a baseband (BB) processor 826, an RF circuit 827, and the like.
- the BB processor 826 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and each layer (for example, L1, MAC (Medium Access Control), RLC (Radio Link Control), and PDCP).
- Various signal processing of Packet Data Convergence Protocol
- Packet Data Convergence Protocol is executed.
- the BB processor 826 may have some or all of the logical functions described above instead of the controller 821.
- the BB processor 826 may be a module that includes a memory that stores a communication control program, a processor that executes the program, and related circuits. The function of the BB processor 826 may be changed by updating the program. Good.
- the module may be a card or a blade inserted into a slot of the base station apparatus 820, or a chip mounted on the card or the blade.
- the RF circuit 827 may include a mixer, a filter, an amplifier, and the like, and transmits and receives a radio signal via the antenna 810.
- the wireless communication interface 825 includes a plurality of BB processors 826 as illustrated in FIG. 33, and the plurality of BB processors 826 may respectively correspond to a plurality of frequency bands used by the eNB 800, for example. Further, the wireless communication interface 825 includes a plurality of RF circuits 827 as shown in FIG. 33, and the plurality of RF circuits 827 may respectively correspond to a plurality of antenna elements, for example.
- FIG. 33 shows an example in which the wireless communication interface 825 includes a plurality of BB processors 826 and a plurality of RF circuits 827. However, the wireless communication interface 825 includes a single BB processor 826 or a single RF circuit 827. But you can.
- the information acquisition unit 151 and the communication control unit 153 described with reference to FIG. 10 may be implemented in the wireless communication interface 825.
- the eNB 800 illustrated in FIG. Alternatively, at least some of these components may be implemented in the controller 821.
- the eNB 800 includes a module including a part (for example, the BB processor 826) or all of the wireless communication interface 825 and / or the controller 821, and the information acquisition unit 151 and the communication control unit 153 are mounted in the module. May be.
- the module executes a program for causing the processor to function as the information acquisition unit 151 and the communication control unit 153 (in other words, a program for causing the processor to execute the operations of the information acquisition unit 151 and the communication control unit 153). You may memorize
- a program for causing a processor to function as the information acquisition unit 151 and the communication control unit 153 is installed in the eNB 800, and the radio communication interface 825 (for example, the BB processor 826) and / or the controller 821 executes the program. May be.
- the eNB 800, the base station apparatus 820, or the module may be provided as an apparatus including the information acquisition unit 151 and the communication control unit 153, and the processor functions as the information acquisition unit 151 and the communication control unit 153.
- a program may be provided.
- a readable storage medium storing the program may be provided.
- the radio communication unit 120 described with reference to FIG. 10 may be implemented in the radio communication interface 825 (for example, the RF circuit 827). Further, the antenna unit 110 may be mounted on the antenna 810.
- the network communication unit 130 may be implemented in the controller 821 and / or the network interface 823.
- FIG. 34 is a block diagram illustrating a second example of a schematic configuration of an eNB to which the technology according to the present disclosure may be applied.
- the eNB 830 includes one or more antennas 840, a base station apparatus 850, and an RRH 860. Each antenna 840 and RRH 860 may be connected to each other via an RF cable. Base station apparatus 850 and RRH 860 can be connected to each other via a high-speed line such as an optical fiber cable.
- Each of the antennas 840 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of radio signals by the RRH 860.
- the eNB 830 includes a plurality of antennas 840 as illustrated in FIG. 34, and the plurality of antennas 840 may respectively correspond to a plurality of frequency bands used by the eNB 830, for example. 34 illustrates an example in which the eNB 830 includes a plurality of antennas 840, but the eNB 830 may include a single antenna 840.
- the base station device 850 includes a controller 851, a memory 852, a network interface 853, a wireless communication interface 855, and a connection interface 857.
- the controller 851, the memory 852, and the network interface 853 are the same as the controller 821, the memory 822, and the network interface 823 described with reference to FIG.
- the wireless communication interface 855 supports a cellular communication method such as LTE or LTE-Advanced, and provides a wireless connection to a terminal located in a sector corresponding to the RRH 860 via the RRH 860 and the antenna 840.
- the wireless communication interface 855 may typically include a BB processor 856 and the like.
- the BB processor 856 is the same as the BB processor 826 described with reference to FIG. 33 except that the BB processor 856 is connected to the RF circuit 864 of the RRH 860 via the connection interface 857.
- the wireless communication interface 855 includes a plurality of BB processors 856 as illustrated in FIG.
- the wireless communication interface 855 may include a single BB processor 856.
- connection interface 857 is an interface for connecting the base station device 850 (wireless communication interface 855) to the RRH 860.
- the connection interface 857 may be a communication module for communication on the high-speed line that connects the base station apparatus 850 (wireless communication interface 855) and the RRH 860.
- the RRH 860 includes a connection interface 861 and a wireless communication interface 863.
- connection interface 861 is an interface for connecting the RRH 860 (wireless communication interface 863) to the base station device 850.
- the connection interface 861 may be a communication module for communication on the high-speed line.
- the wireless communication interface 863 transmits and receives wireless signals via the antenna 840.
- the wireless communication interface 863 may typically include an RF circuit 864 and the like.
- the RF circuit 864 may include a mixer, a filter, an amplifier, and the like, and transmits and receives wireless signals via the antenna 840.
- the wireless communication interface 863 includes a plurality of RF circuits 864 as illustrated in FIG. 34, and the plurality of RF circuits 864 may correspond to, for example, a plurality of antenna elements, respectively. 34 shows an example in which the wireless communication interface 863 includes a plurality of RF circuits 864, the wireless communication interface 863 may include a single RF circuit 864.
- the information acquisition unit 151 and the communication control unit 153 described with reference to FIG. 10 may be implemented in the wireless communication interface 855 and / or the wireless communication interface 863.
- the eNB 830 illustrated in FIG. Alternatively, at least some of these components may be implemented in the controller 851.
- the eNB 830 includes a module including a part (for example, the BB processor 856) or all of the wireless communication interface 855 and / or the controller 851, and the information acquisition unit 151 and the communication control unit 153 are mounted in the module. May be.
- the module executes a program for causing the processor to function as the information acquisition unit 151 and the communication control unit 153 (in other words, a program for causing the processor to execute the operations of the information acquisition unit 151 and the communication control unit 153). You may memorize
- a program for causing a processor to function as the information acquisition unit 151 and the communication control unit 153 is installed in the eNB 830, and the wireless communication interface 855 (for example, the BB processor 856) and / or the controller 851 executes the program. May be.
- the eNB 830, the base station device 850, or the module may be provided as a device including the information acquisition unit 151 and the communication control unit 153, and the processor functions as the information acquisition unit 151 and the communication control unit 153.
- a program may be provided.
- a readable storage medium storing the program may be provided.
- the wireless communication unit 120 described with reference to FIG. 10 may be implemented in the wireless communication interface 863 (for example, the RF circuit 864).
- the antenna unit 110 may be mounted on the antenna 840.
- the network communication unit 130 may be implemented in the controller 851 and / or the network interface 853.
- FIG. 35 is a block diagram illustrating an example of a schematic configuration of a smartphone 900 to which the technology according to the present disclosure may be applied.
- the smartphone 900 includes a processor 901, a memory 902, a storage 903, an external connection interface 904, a camera 906, a sensor 907, a microphone 908, an input device 909, a display device 910, a speaker 911, a wireless communication interface 912, one or more antenna switches 915.
- One or more antennas 916, a bus 917, a battery 918 and an auxiliary controller 919 are provided.
- the processor 901 may be, for example, a CPU or a SoC (System on Chip), and controls the functions of the application layer and other layers of the smartphone 900.
- the memory 902 includes a RAM and a ROM, and stores programs executed by the processor 901 and data.
- the storage 903 can include a storage medium such as a semiconductor memory or a hard disk.
- the external connection interface 904 is an interface for connecting an external device such as a memory card or a USB (Universal Serial Bus) device to the smartphone 900.
- the camera 906 includes, for example, an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor), and generates a captured image.
- the sensor 907 may include a sensor group such as a positioning sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor.
- the microphone 908 converts sound input to the smartphone 900 into an audio signal.
- the input device 909 includes, for example, a touch sensor that detects a touch on the screen of the display device 910, a keypad, a keyboard, a button, or a switch, and receives an operation or information input from a user.
- the display device 910 has a screen such as a liquid crystal display (LCD) or an organic light emitting diode (OLED) display, and displays an output image of the smartphone 900.
- the speaker 911 converts an audio signal output from the smartphone 900 into audio.
- the wireless communication interface 912 supports any cellular communication method such as LTE or LTE-Advanced, and performs wireless communication.
- the wireless communication interface 912 may typically include a BB processor 913, an RF circuit 914, and the like.
- the BB processor 913 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various signal processing for wireless communication.
- the RF circuit 914 may include a mixer, a filter, an amplifier, and the like, and transmits and receives radio signals via the antenna 916.
- the wireless communication interface 912 may be a one-chip module in which the BB processor 913 and the RF circuit 914 are integrated.
- the wireless communication interface 912 may include a plurality of BB processors 913 and a plurality of RF circuits 914 as illustrated in FIG. 35 illustrates an example in which the wireless communication interface 912 includes a plurality of BB processors 913 and a plurality of RF circuits 914, the wireless communication interface 912 includes a single BB processor 913 or a single RF circuit 914. But you can.
- the wireless communication interface 912 may support other types of wireless communication methods such as a short-range wireless communication method, a proximity wireless communication method, or a wireless LAN (Local Area Network) method in addition to the cellular communication method.
- a BB processor 913 and an RF circuit 914 for each wireless communication method may be included.
- Each of the antenna switches 915 switches the connection destination of the antenna 916 among a plurality of circuits (for example, circuits for different wireless communication systems) included in the wireless communication interface 912.
- Each of the antennas 916 includes a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of a radio signal by the radio communication interface 912.
- the smartphone 900 may include a plurality of antennas 916 as illustrated in FIG. Note that FIG. 35 illustrates an example in which the smartphone 900 includes a plurality of antennas 916, but the smartphone 900 may include a single antenna 916.
- the smartphone 900 may include an antenna 916 for each wireless communication method.
- the antenna switch 915 may be omitted from the configuration of the smartphone 900.
- the bus 917 connects the processor 901, the memory 902, the storage 903, the external connection interface 904, the camera 906, the sensor 907, the microphone 908, the input device 909, the display device 910, the speaker 911, the wireless communication interface 912, and the auxiliary controller 919 to each other.
- the battery 918 supplies electric power to each block of the smartphone 900 shown in FIG. 35 through a power supply line partially shown by a broken line in the drawing.
- the auxiliary controller 919 operates the minimum necessary functions of the smartphone 900 in the sleep mode.
- the information acquisition unit 261 and the communication control unit 263 described with reference to FIG. 13 may be implemented in the wireless communication interface 912.
- the smartphone 900 illustrated in FIG. Alternatively, at least some of these components may be implemented in the processor 901 or the auxiliary controller 919.
- the smartphone 900 includes a module including a part (for example, the BB processor 913) or the whole of the wireless communication interface 912, the processor 901, and / or the auxiliary controller 919, and the information acquisition unit 261 and the communication control are included in the module.
- Unit 263 may be implemented.
- the module executes a program for causing the processor to function as the information acquisition unit 261 and the communication control unit 263 (in other words, a program for causing the processor to execute the operations of the information acquisition unit 261 and the communication control unit 263).
- a program for causing a processor to function as the information acquisition unit 261 and the communication control unit 263 is installed in the smartphone 900, and the wireless communication interface 912 (for example, the BB processor 913), the processor 901, and / or the auxiliary controller 919 is installed. May execute the program.
- the smartphone 900 or the module may be provided as an apparatus including the information acquisition unit 261 and the communication control unit 263, and a program for causing the processor to function as the information acquisition unit 261 and the communication control unit 263 is provided. May be.
- a readable storage medium storing the program may be provided.
- the wireless communication unit 220 described with reference to FIG. 13 may be implemented in the wireless communication interface 912 (for example, the RF circuit 914).
- the antenna unit 210 may be mounted on the antenna 916.
- FIG. 36 is a block diagram illustrating an example of a schematic configuration of a car navigation device 920 to which the technology according to the present disclosure can be applied.
- the car navigation apparatus 920 includes a processor 921, a memory 922, a GPS (Global Positioning System) module 924, a sensor 925, a data interface 926, a content player 927, a storage medium interface 928, an input device 929, a display device 930, a speaker 931, and wireless communication.
- the interface 933 includes one or more antenna switches 936, one or more antennas 937, and a battery 938.
- the processor 921 may be a CPU or SoC, for example, and controls the navigation function and other functions of the car navigation device 920.
- the memory 922 includes RAM and ROM, and stores programs and data executed by the processor 921.
- the GPS module 924 measures the position (for example, latitude, longitude, and altitude) of the car navigation device 920 using GPS signals received from GPS satellites.
- the sensor 925 may include a sensor group such as a gyro sensor, a geomagnetic sensor, and an atmospheric pressure sensor.
- the data interface 926 is connected to the in-vehicle network 941 through a terminal (not shown), for example, and acquires data generated on the vehicle side such as vehicle speed data.
- the content player 927 reproduces content stored in a storage medium (for example, CD or DVD) inserted into the storage medium interface 928.
- the input device 929 includes, for example, a touch sensor, a button, or a switch that detects a touch on the screen of the display device 930, and receives an operation or information input from the user.
- the display device 930 has a screen such as an LCD or an OLED display, and displays a navigation function or an image of content to be reproduced.
- the speaker 931 outputs the navigation function or the audio of the content to be played back.
- the wireless communication interface 933 supports any cellular communication method such as LTE or LTE-Advanced, and performs wireless communication.
- the wireless communication interface 933 may typically include a BB processor 934, an RF circuit 935, and the like.
- the BB processor 934 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and performs various signal processing for wireless communication.
- the RF circuit 935 may include a mixer, a filter, an amplifier, and the like, and transmits and receives a radio signal via the antenna 937.
- the wireless communication interface 933 may be a one-chip module in which the BB processor 934 and the RF circuit 935 are integrated.
- the wireless communication interface 933 may include a plurality of BB processors 934 and a plurality of RF circuits 935 as shown in FIG. 36 shows an example in which the wireless communication interface 933 includes a plurality of BB processors 934 and a plurality of RF circuits 935, the wireless communication interface 933 includes a single BB processor 934 or a single RF circuit 935. But you can.
- the wireless communication interface 933 may support other types of wireless communication methods such as a short-range wireless communication method, a proximity wireless communication method, or a wireless LAN method in addition to the cellular communication method.
- a BB processor 934 and an RF circuit 935 may be included for each communication method.
- Each of the antenna switches 936 switches the connection destination of the antenna 937 among a plurality of circuits included in the wireless communication interface 933 (for example, circuits for different wireless communication systems).
- Each of the antennas 937 has a single or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission / reception of a radio signal by the radio communication interface 933.
- the car navigation device 920 may include a plurality of antennas 937 as shown in FIG. 36 illustrates an example in which the car navigation apparatus 920 includes a plurality of antennas 937, the car navigation apparatus 920 may include a single antenna 937.
- the car navigation device 920 may include an antenna 937 for each wireless communication method.
- the antenna switch 936 may be omitted from the configuration of the car navigation device 920.
- the battery 938 supplies power to each block of the car navigation device 920 shown in FIG. 36 via a power supply line partially shown by broken lines in the drawing. Further, the battery 938 stores electric power supplied from the vehicle side.
- the information acquisition unit 261 and the communication control unit 263 described with reference to FIG. 13 may be implemented in the wireless communication interface 933.
- the car navigation device 920 illustrated in FIG. Alternatively, at least some of these components may be implemented in the processor 921.
- the car navigation apparatus 920 includes a module including a part (for example, the BB processor 934) or all of the wireless communication interface 933 and / or the processor 921, and the information acquisition unit 261 and the communication control unit 263 are included in the module. May be implemented.
- the module executes a program for causing the processor to function as the information acquisition unit 261 and the communication control unit 263 (in other words, a program for causing the processor to execute the operations of the information acquisition unit 261 and the communication control unit 263). You may memorize
- a program for causing a processor to function as the information acquisition unit 261 and the communication control unit 263 is installed in the car navigation apparatus 920, and the wireless communication interface 933 (for example, the BB processor 934) and / or the processor 921 May be executed.
- the car navigation apparatus 920 or the module may be provided as an apparatus including the information acquisition unit 261 and the communication control unit 263, and a program for causing the processor to function as the information acquisition unit 261 and the communication control unit 263 is provided. May be provided.
- a readable storage medium storing the program may be provided.
- the radio communication unit 220 described with reference to FIG. 13 may be implemented in the radio communication interface 933 (for example, the RF circuit 935).
- the antenna unit 210 may be mounted on the antenna 937.
- the technology according to the present disclosure may be realized as an in-vehicle system (or vehicle) 940 including one or more blocks of the car navigation device 920 described above, an in-vehicle network 941, and a vehicle side module 942. That is, the in-vehicle system (or vehicle) 940 may be provided as a device including the information acquisition unit 261 and the communication control unit 263 (or the information acquisition unit 271 and the communication control unit 273).
- the vehicle-side module 942 generates vehicle-side data such as vehicle speed, engine speed, or failure information, and outputs the generated data to the in-vehicle network 941.
- the information acquisition unit 151 includes first information (first PRACH configuration) for identifying a random access resource for each of a plurality of TDD configurations. Index). Further, the information acquisition unit 151 acquires second information (second PRACH configuration index) for identifying a random access resource for each of the plurality of TDD configurations. Further, the communication control unit 153 notifies the first information. In addition, the communication control unit 153 notifies the second information.
- the random access resource for each of the plurality of TDD configurations identified from the second information is the random access for any of the plurality of TDD configurations identified from the first information. Also includes resources.
- the legacy UE can transmit a random access preamble using PRACH. That is, it becomes possible to suppress the failure of the random access procedure by the legacy UE. As a result, the legacy UE does not repeatedly transmit the random access preamble, thereby suppressing an increase in overhead and power consumption.
- the random access preamble transmitted by the legacy UE becomes an interference source for communication involving other UEs. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- the information acquisition unit 161 includes first information (first PRACH configuration) for identifying a random access resource for each of a plurality of TDD configurations. Index). Further, the communication control unit 163 notifies the first information. The random access resource identified from the first information is common among the plurality of TDD configurations.
- the legacy UE even if the TDD configuration is newly set, the PRACH (the PRACH corresponding to the broadcast PRACH configuration index) is maintained. Therefore, even if the legacy UE misidentifies the TDD configuration, it can transmit the random access preamble using the PRACH. That is, it becomes possible to suppress the failure of the random access procedure by the legacy UE. As a result, the legacy UE does not repeatedly transmit the random access preamble, thereby suppressing an increase in overhead and power consumption.
- the random access preamble transmitted by the legacy UE becomes an interference source for communication involving other UEs. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- the information acquisition unit 181 includes first information (first PRACH configuration) for identifying a random access resource for each of a plurality of TDD configurations. Index). Further, the communication control unit 173 notifies the first information.
- the random access resource for each of the plurality of TDD configurations identified from the first information is an uplink resource when any of the plurality of TDD configurations is set.
- the resource for random access for each TDD configuration identified from the broadcast PRACH configuration index can be always used as the PRACH regardless of the set TDD configuration. Therefore, even if the legacy UE misidentifies the TDD configuration, it can transmit the random access preamble using the PRACH. That is, it becomes possible to suppress the failure of the random access procedure by the legacy UE. As a result, the legacy UE does not repeatedly transmit the random access preamble, thereby suppressing an increase in overhead and power consumption.
- the random access preamble transmitted by the legacy UE becomes an interference source for communication involving other UEs. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- the information acquisition unit 181 acquires information on random access resources for a TDD configuration that is set among a plurality of TDD configurations. Then, when the TDD configuration is newly set, the communication control unit 183 uses the linedam access resource for the previous TDD configuration that was set before the newly set TDD configuration. It is not assigned to any UE.
- the radio resource to which the random access preamble can be transmitted by the legacy UE is not assigned to any UE. Therefore, it can suppress that the random access preamble transmitted by the legacy UE becomes an interference source for communication involving other UEs. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- the information acquisition unit 191 acquires information related to a new setting of the TDD configuration.
- the communication control unit 193 prohibits a random access procedure by the UE for a predetermined period when a TDD configuration is newly set.
- the random access preamble is not transmitted by the UE during a predetermined period. Therefore, even if the legacy UE misidentifies the TDD configuration, interference due to the random access preamble does not occur. That is, when the TDD configuration is dynamically set, interference due to the random access preamble can be suppressed.
- the communication system has been described as an example in which the communication system is based on LTE, LTE-Advanced, or a communication standard equivalent thereto, but the present disclosure is not limited to such an example.
- the communication system may be a system that complies with another communication standard.
- the base station included in the communication system may be referred to by another name instead of being referred to as eNodeB.
- the terminal device contained in a communication system may be called with another name instead of being called UE.
- processing steps in the communication control processing of this specification do not necessarily have to be executed in time series in the order described in the flowchart.
- the processing steps in the communication control process may be executed in an order different from the order described in the flowchart, or may be executed in parallel.
- a processor for example, a CPU, a DSP, etc.
- a communication node for example, eNodeB or UE
- a computer program (in other words, a computer program for causing the processor to execute operations of the components of the communication node) can also be created.
- a storage medium storing the computer program may also be provided.
- An apparatus for example, a finished product or a module for a finished product (a component, a processing circuit, a chip, or the like)
- a memory that stores the computer program and one or more processors that can execute the computer program May also be provided.
- a method including operations of components of the communication node is also included in the technology according to the present disclosure.
- Including Communication control device is the following configurations, Including Communication control device.
- An acquisition unit that acquires first information for identifying a resource for random access for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a radio frame of a time division duplex (TDD) scheme; , A communication control unit for informing the first information; With The random access resource identified from the first information is common among the plurality of TDD configurations. Communication control device. (3) The acquisition unit further acquires second information for identifying a random access resource for each of the plurality of TDD configurations, The communication control unit notifies the second information; The communication control device according to (2).
- TDD time division duplex
- An acquisition unit that acquires first information for identifying a resource for random access for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a radio frame of a time division duplex (TDD) scheme; , A communication control unit for informing the first information; With The random access resource for each of the plurality of TDD configurations identified from the first information is an uplink resource when any of the plurality of TDD configurations is set. Communication control device. (5) The communication control unit randomly accesses resources for random access for each of the plurality of TDD configurations, which are identified from the first information, when any of the plurality of TDD configurations is set. The communication control device according to (4), which is used as a channel.
- the acquisition unit further acquires second information for identifying a random access resource for each of the plurality of TDD configurations, The communication control unit notifies the second information; The communication control device according to (4) or (5).
- the communication control unit broadcasts the first information in system information, and notifies the second information by individual signaling, any one of (1), (3), and (6) The communication control apparatus according to item 1.
- the said communication control part notifies the said 2nd information by separate signaling to the terminal device which can perform radio
- the communication control unit notifies the first information in the system information and notifies the second information in the system information, any of (1), (3), and (6) The communication control apparatus according to claim 1.
- a communication control unit for prohibiting a random access procedure by a terminal device during a predetermined period when a TDD configuration is newly set;
- a communication control device comprising: (16) The communication control device according to (15), wherein the communication control unit prohibits the random access procedure by notifying the system information of information for prohibiting the random access procedure.
- a random access procedure is performed by using the random access resource for the TDD configuration set among the plurality of TDD configurations, which is a resource for random access identified from the second information.
- a memory for storing a predetermined program;
- a processor capable of executing the predetermined program;
- the predetermined program is First information for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame is broadcast by the base station.
- a random access procedure is performed by using the random access resource for the TDD configuration set among the plurality of TDD configurations, which is a resource for random access identified from the second information.
- the random access resource for each of the plurality of TDD configurations identified from the second information is the random access resource for any of the plurality of TDD configurations identified from the first information.
- First information for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame is broadcast by the base station.
- a random access procedure is performed by using the random access resource for the TDD configuration set among the plurality of TDD configurations, which is a resource for random access identified from the second information.
- a memory for storing a predetermined program;
- a processor capable of executing the predetermined program;
- the predetermined program is First information for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame is broadcast by the base station.
- a random access procedure is performed by using the random access resource for the TDD configuration set among the plurality of TDD configurations, which is a resource for random access identified from the second information.
- Is a program for executing The random access resource identified from the first information is common among the plurality of TDD configurations.
- First information for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame is broadcast by the base station.
- a random access procedure is performed by using the random access resource for the TDD configuration set among the plurality of TDD configurations, which is a resource for random access identified from the second information.
- a communication control unit; With The random access resource for each of the plurality of TDD configurations identified from the first information is an uplink resource when any of the plurality of TDD configurations is set. Terminal device.
- a memory for storing a predetermined program;
- a processor capable of executing the predetermined program;
- the predetermined program is First information for identifying a random access resource for each of a plurality of TDD configurations each representing a link direction in a subframe unit in a time division duplex (TDD) radio frame is broadcast by the base station.
- a random access procedure is performed by using the random access resource for the TDD configuration set among the plurality of TDD configurations, which is a resource for random access identified from the second information.
- Is a program for executing The random access resource for each of the plurality of TDD configurations identified from the first information is an uplink resource when any of the plurality of TDD configurations is set.
- Information processing device is an uplink resource when any of the plurality of TDD configurations is set.
- 1 communication system 10 cell 20 UE (legacy UE) 100 eNodeB 151, 161, 171, 181, 191 Information acquisition unit 153, 163, 173, 183, 193 Communication control unit 200 UE (non-legacy UE) 261, 271 Information acquisition unit 263, 273 Communication control unit
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Abstract
Description
所定のプログラムを記憶するメモリと、上記所定のプログラムを実行可能なプロセッサと、を備える情報処理装置が提供される。上記所定のプログラムは、時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、上記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、上記第2の情報を取得することと、上記第2の情報から識別されるランダムアクセス用リソースであって、上記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての上記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行うことと、を実行させるためのプログラムである。上記第2の情報から識別される、上記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、上記第1の情報から識別される、上記複数のTDDコンフィギュレーションのいずれについてのランダムアクセス用リソースも包含する。
1.はじめに
2.本実施形態に係る通信システムの概略的な構成
3.第1の実施形態
3.1.eNodeBの機能構成
3.2.UEの機能構成
3.3.処理の流れ
4.第2の実施形態
4.1.eNodeBの機能構成
4.2.UEの機能構成
4.3.処理の流れ
4.4.変形例
5.第3の実施形態
5.1.eNodeBの機能構成
5.2.UEの機能構成
5.3.処理の流れ
5.4.変形例
6.第4の実施形態
6.1.eNodeBの機能構成
6.2.処理の流れ
7.第5の実施形態
7.1.eNodeBの機能構成
7.2.処理の流れ
8.応用例
8.1.eNodeBに関する応用例
8.2.UEに関する応用例
9.まとめ
まず、図1~図8を参照して、LTEにおけるTDD、ランダムアクセス、ランダムアクセスプリアンブル、及びダイナミックTDDリコンフィギュレーションのケースにおけるランダムアクセスを説明する。
-FDD及びTDD
3GPPにより規格化されたLTEでは、FDD及びTDDのいずれでも採用され得る。周波数の配置が容易であること、及び、アップリンクとダウンリンクの無線リソースの比率を変更しやすいことから、周波数の有効利用のために今後多くのシステムにおいてTDDが採用されることが予想される。
図1を参照して、TDDのフレームフォーマットの例を説明する。図1は、TDDのフレームフォーマットの一例を説明するための説明図である。図1を参照すると、TDDが採用される場合にも、10のサブフレームを含む1つの無線フレーム(Radio Frame)が用いられる。本明細書において、無線フレームは、単に「フレーム」とも呼ばれる。無線フレームに含まれる10のサブフレームの各々は、ダウンリンクサブフレーム、アップリンクサブフレーム、及びスペシャルサブフレームのうちのいずれかである。
TDDでは、サブフレーム単位のリンク方向(例えば、ダウンリンク、アップリンク)が設定される。より具体的には、サブフレーム単位のリンク方向を表す複数のTDDアップリンク/ダウンリンクコンフィギュレーション(即ち、TDDコンフィギュレーション)が予め用意され、いずれかのTDDコンフィギュレーションが用いられる。以下、図2を参照して、TDDコンフィギュレーションの具体例を説明する。
さらに、ネットワーク全体のスループットの向上のために、今後、セル内のトラフィックに応じて、最適なTDDコンフィギュレーションの動的な設定も、3GPPにおいて検討されている。このようなTDDコンフィギュレーションを動的に設定することを、ダイナミックTDDリコンフィギュレーション(Dynamic TDD Reconfiguration)と呼ぶ。
UEは、接続の初期確立、接続の再確立、ハンドオーバ、アップリンク再同期等、eNodeBとの接続を確立する際に、ランダムアクセス手続き(random access procedure)を行う。以下、図3を参照して、ランダムアクセス手続きの例を説明する。
-PRACH
ランダムアクセスプリアンブルの送信には、物理ランダムアクセスチャネル(PRACH)が使用される。PRACHとして使用される無線リソースをUEが知ることができるように、eNodeBは、PRACHコンフィギュレーションインデックス及びPRACH周波数オフセットをシステム情報ブロック2(SIB2)の中で報知する。そして、UEは、これらの情報から、PRACHとして使用される無線リソースを識別し、当該無線リソースを使用してランダムアクセスプリアンブルを送信する。
ランダムアクセスプリアンブルのフォーマットとして、5つのフォーマットが用意されている。以下、この点について、図5及び図6を参照して具体例を説明する。
FDDでは、1つのサブフレームに1つの無線リソース(1つのリソースブロック群)がPRACHとして使用される。10msの無線フレームの中のいずれのサブフレームにPRACHがあるかは、PRACHコンフィギュレーションインデックスにより決まる。また、周波数方向においてどのリソースブロック群がPRACHとなるかは、PRACH周波数オフセットから算出される。
TDDでは、FDDよりも、無線フレームあたりのアップリンクサブフレームの数が小さい。そのため、TDDでは、PRACHの容量を確保するために、1つのサブフレームに複数の無線リソース(複数のリソースブロック群)がPRACHとして使用可能である。3GPPでは、TDDについて、PRACHコンフィギュレーションごとに、PRACHとして使用される無線リソースが定められている。以下、この点について図8を参照して具体例を説明する。
上述したように、PRACHコンフィギュレーションが決まったとしても、TDDコンフィギュレーションによって、PRACHとして使用される無線リソースは変わり得る。そのため、ダイナミックTDDリコンフィギュレーションが採用される場合には、UEは、動的に設定されるTDDコンフィギュレーションを適宜認識できなければ、ランダムアクセスプリアンブルをPRACH以外で送信し得る。
続いて、図9を参照して、本開示の実施形態に係る通信システム1の概略的な構成を説明する。図9は、本開示の実施形態に係る通信システム1の概略的な構成の一例を示す説明図である。図9を参照すると、通信システム1は、eNodeB100、UE20及びUE200を含む。この例では、通信システム1は、LTE、LTE-Advanced又はこれに準ずる通信規格に準拠したシステムである。
eNodeB100は、セル10内に位置するUE20及びUE200との無線通信を行う。とりわけ本開示の実施形態では、eNodeB100は、TDDでの無線通信を行う。また、eNodeB100は、TDDコンフィギュレーションを動的に設定し、設定されるTDDコンフィギュレーションに従った無線通信を行う。即ち、eNodeB100は、ダイナミックTDDリコンフィギュレーションを採用する。
UE20は、セル10内に位置する場合にeNodeB100との無線通信を行う。UE20は、ダウンリンクTDDリコンフィギュレーションについてのケイパビリティを有しないUEである。本明細書では、UE20は、レガシーUEとも呼ばれる。
UE200は、セル10内に位置する場合にeNodeB100との無線通信を行う。UE200は、ダウンリンクTDDリコンフィギュレーションについてのケイパビリティを有するUEである。本明細書では、UE200は、非レガシーUEとも呼ばれる。
続いて、図10~図17Bを参照して、本開示の第1の実施形態を説明する。
まず、図10~12を参照して、第1の実施形態に係るeNodeB100-1の概略的な機能構成を説明する。図10は、第1の実施形態に係るeNodeB100-1の機能構成の一例を示すブロック図である。図10を参照すると、eNodeB100-1は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部140及び処理部150を含む。
アンテナ部110は、無線信号を受信し、受信された無線信号を無線通信部120へ出力する。また、アンテナ部110は、無線通信部120により出力された送信信号を送信する。
無線通信部120は、セル10内に位置するUE20及びUE200との無線通信を行う。とりわけ本開示の実施形態では、無線通信部120は、TDDでの無線通信を行う。
ネットワーク通信部130は、他の通信ノードと通信する。例えば、ネットワーク通信部130は、他のeNodeB100と通信する。また、例えば、ネットワーク通信部130は、コアネットワークの通信ノードと通信する。例えば、当該コアネットワークは、EPC(Evolved Packet Core)であり、当該通信ノードは、MME(Mobility Management Entity)、S-GW(Serving Gateway)等を含む。
記憶部140は、eNodeB100の動作のためのプログラム及びデータを記憶する。
処理部150は、eNodeB100-1の様々な機能を提供する。処理部150は、情報取得部151及び通信制御部153を含む。
情報取得部151は、通信制御部153による制御に必要な情報を取得する。例えば、情報取得部151は、無線通信部120を介して、他の装置からの情報を取得する。また、例えば、情報取得部151は、記憶部140に記憶されている情報を取得する。
とりわけ、第1の実施形態では、情報取得部151は、複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報を取得する。また、情報取得部151は、上記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報を取得する。
とりわけ第1の実施形態では、上記第2の情報から識別される、上記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、上記第1の情報から識別される、上記複数のTDDコンフィギュレーションのいずれについてのランダムアクセス用リソースも包含する。例えば、第2のPRACHコンフィギュレーションインデックスから識別される、上記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、第1のPRACHコンフィギュレーションインデックスから識別される、上記複数のTDDコンフィギュレーションのいずれについてのランダムアクセス用リソースも包含する。以下、この点について、図11を参照して具体例を説明する。
通信制御部153は、セル10内での無線通信を制御する。
とりわけ第1の実施形態では、通信制御部153は、上記第1の情報を報知する。具体的には、例えば、通信制御部153は、第1のPRACHコンフィギュレーションインデックスを報知する。
例えば、通信制御部153は、TDDコンフィギュレーションを動的に設定する。
例えば、通信制御部153は、設定されるTDDコンフィギュレーションを報知する。より具体的には、例えば、通信制御部153は、設定されるTDDコンフィギュレーションをSIB1の中で報知する。
通信制御部153は、無線リソースの制御を行う。
とりわけ第1の実施形態では、通信制御部153は、上記第2の情報(第2のPRACHコンフィギュレーションインデックス)から識別されるランダムアクセス用リソースであって、設定されているTDDコンフィギュレーションについての上記ランダムアクセス用リソースを、PRACHとして使用する。即ち、通信制御部153は、第2のPRACHコンフィギュレーションインデックスから識別される上記ランダムアクセス用リソースで無線通信部120により受信される信号を、UEからのランダムアクセスプリアンブルとして取り扱う。
また、例えば、通信制御部153は、無線リソースをUE(UE20及びUE200)に割り当てる。例えば、通信制御部153は、設定されているTDDコンフィギュレーションに従って、ダウンリンクサブフレームのPDSCH(Physical Downlink Shared Channel)の無線リソースを、UEに割り当てる。また、通信制御部153は、設定されているTDDコンフィギュレーションに従って、アップリンクサブフレームのPUSCH(Physical Uplink Shared Channel)の無線リソースを、UEに割り当てる。
ここで、TDDコンフィギュレーションの設定と、当該設定に伴うランダムアクセス用リソースとの具体例を、図12を再び参照して説明する。なお、ここでは、図11を参照して説明したように、PRACHコンフィギュレーションインデックス5がシステム情報の中で報知され、PRACHコンフィギュレーションインデックス15がシグナリングによりUE200に通知されるものとする。
次に、図13を参照して、第1の実施形態に係るUE200-1の概略的な機能構成を説明する。図13は、第1の実施形態に係るUE200-1の機能構成の一例を示すブロック図である。UE200-1は、アンテナ部210、無線通信部220、記憶部230、入力部240、表示部250及び処理部260を含む。
アンテナ部210は、無線信号を受信し、受信された無線信号を無線通信部220へ出力する。また、アンテナ部210は、無線通信部220により出力された送信信号を送信する。
無線通信部220は、UE200がセル10に位置する場合に、eNodeB100との無線通信を行う。とりわけ本開示の実施形態では、無線通信部220は、TDDでの無線通信を行う。
記憶部230は、UE200の動作のためのプログラム及びデータを記憶する。
入力部240は、UE200のユーザによる入力を受け付ける。そして、入力部240は、入力結果を処理部260に提供する。
表示部250は、UE200からの出力画面(即ち、出力画像)を表示する。例えば、表示部250は、処理部260(表示制御部265)による制御に応じて、出力画面を表示する。
処理部260は、UE200-1の様々な機能を提供する。処理部260は、情報取得部261、通信制御部263及び表示制御部265を含む。
情報取得部261は、通信制御部263による制御に必要な情報を取得する。例えば、情報取得部261は、無線通信部220を介して、他の装置からの情報を取得する。また、例えば、情報取得部261は、記憶部230に記憶されている情報を取得する。
とりわけ第1の実施形態では、情報取得部261は、上記第1の情報がeNodeB100-1により報知され、上記第2の情報がeNodeB100-1により通知される場合に、上記第2の情報を取得する。例えば、第1のPRACHコンフィギュレーションインデックスがeNodeB100-1により報知され、第2のPRACHコンフィギュレーションインデックスがeNodeB100-1により通知される。この場合に、情報取得部261は、無線通信部220を介して、第2のPRACHコンフィギュレーションインデックスを取得する。
また、例えば、情報取得部261は、TDDコンフィギュレーションの情報がeNodeB100-1により通知されると、当該TDDコンフィギュレーションの情報を取得する。より具体的には、例えば、eNodeB100-1が、RRCシグナリングによりTDDコンフィギュレーションの情報をUE200-1に通知すると、情報取得部261は、当該TDDコンフィギュレーションの情報を取得する。
通信制御部263は、UE200-1による無線通信を制御する。
通信制御部263は、ランダムアクセス手続きを行う。
通信制御部263は、TDDコンフィギュレーションに従って無線通信を制御する。
表示制御部265は、表示部250による出力画面の表示を制御する。例えば、表示制御部265は、表示部250により表示される出力画面を生成し、当該出力画面を表示部250に表示させる。
次に、図14~図17Bを参照して、第1の実施形態に係る通信制御処理の例を説明する。
図14は、第1の実施形態に係るeNodeB側の第1の通信制御処理の概略的な流れの一例を示すフローチャートである。
図15は、第1の実施形態に係るeNodeB側の第2の通信制御処理の概略的な流れの一例を示すフローチャートである。当該第2の通信制御処理は、例えば、UEが新たに接続された場合に実行される。
図16は、第1の実施形態に係るUE側の通信制御処理の概略的な流れの一例を示すフローチャートである。当該通信制御処理は、ランダムアクセス手続きが行われる際に実行される。
図17A及び図17Bは、第1の実施形態に係るeNodeB及びUE間の通信制御処理の概略的な流れの一例を示すシーケンス図である。
続いて、図18~図24を参照して、本開示の第2の実施形態を説明する。
まず、図18~図20を参照して、第2の実施形態に係るeNodeB100-2の概略的な機能構成を説明する。図18は、第2の実施形態に係るeNodeB100-2の機能構成の一例を示すブロック図である。図18を参照すると、eNodeB100-2は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部140及び処理部160を含む。
処理部160は、eNodeB100-2の様々な機能を提供する。処理部160は、情報取得部161及び通信制御部163を含む。
情報取得部161は、通信制御部163による制御に必要な情報を取得する。例えば、情報取得部161は、無線通信部120を介して、他の装置からの情報を取得する。また、例えば、情報取得部161は、記憶部140に記憶されている情報を取得する。
とりわけ、第2の実施形態では、情報取得部161は、複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報を取得する。
とりわけ第2の実施形態では、上記第1の情報から識別されるランダムアクセス用リソースは、上記複数のTDDコンフィギュレーションの間で共通である。以下、この点について、図19を参照して具体例を説明する。
通信制御部163は、セル10内での無線通信を制御する。
とりわけ第1の実施形態では、通信制御部163は、上記第1の情報を報知する。具体的には、例えば、通信制御部163は、第1のPRACHコンフィギュレーションインデックスを報知する。
TDDコンフィギュレーションの設定、並びに、TDDコンフィギュレーションの報知及び通知については、通信制御部163は、第1の実施形態に係る通信制御部153と同様に動作する。
通信制御部163は、無線リソースの制御を行う。
とりわけ第2の実施形態では、通信制御部163は、上記第1の情報(第1のPRACHコンフィギュレーションインデックス)から識別されるランダムアクセス用リソースであって、設定されているTDDコンフィギュレーションについての上記ランダムアクセス用リソースを、PRACHとして使用する。即ち、通信制御部163は、第1のPRACHコンフィギュレーションインデックスから識別される上記ランダムアクセス用リソースで無線通信部120により受信される信号を、UEからのランダムアクセスプリアンブルとして取り扱う。
UEへの無線リソースの割当てについては、通信制御部163は、第1の実施形態に係る通信制御部153と同様に動作する。
ここで、TDDコンフィギュレーションの設定と、当該設定に伴うランダムアクセス用リソースとの具体例を、図12を再び参照して説明する。なお、ここでは、図19を参照して説明したように、PRACHコンフィギュレーションインデックス58がシステム情報の中で報知されるものとする。
次に、図21を参照して、第2の実施形態に係るUE200-2の概略的な機能構成を説明する。図21は、第2の実施形態に係るUE200-2の機能構成の一例を示すブロック図である。UE200-2は、アンテナ部210、無線通信部220、記憶部230、入力部240、表示部250及び処理部270を含む。
情報取得部271は、通信制御部273による制御に必要な情報を取得する。例えば、情報取得部271は、無線通信部220を介して、他の装置からの情報を取得する。また、例えば、情報取得部271は、記憶部230に記憶されている情報を取得する。
とりわけ第2の実施形態では、情報取得部271は、上記第1の情報がeNodeB100-2により報知される場合に、上記第1の情報を取得する。例えば、第1のPRACHコンフィギュレーションインデックスがeNodeB100-2により報知される。この場合に、情報取得部271は、無線通信部220を介して、第1のPRACHコンフィギュレーションインデックスを取得する。
TDDコンフィギュレーションの情報の取得については、情報取得部271は、第1の実施形態に係る情報取得部261と同様に動作する。
通信制御部273は、UE200-2による無線通信を制御する。
通信制御部273は、ランダムアクセス手続きを行う。
TDDコンフィギュレーションに従った無線通信の制御については、通信制御部273は、第1の実施形態に係る通信制御部263と同様に動作する。
次に、図22~図23Bを参照して、第2の実施形態に係る通信制御処理の例を説明する。
図22は、第2の実施形態に係るUE側の通信制御処理の概略的な流れの一例を示すフローチャートである。当該通信制御処理は、ランダムアクセス手続きが行われる際に実行される。
図23A及び図23Bは、第2の実施形態に係るeNodeB及びUE間の通信制御処理の概略的な流れの一例を示すシーケンス図である。
次に、図24を参照して、第2の実施形態の変形例を説明する。第2の実施形態の変形例では、第1のPRACHコンフィギュレーションインデックスが報知されることに加えて、第2のPRACHコンフィギュレーションインデックスが通知される。そして、UE200(非レガシーUE)は、第2のPRACHコンフィギュレーションインデックスから識別される、設定されているTDDコンフィギュレーションについてのランダムアクセス用リソースを使用して、ランダムアクセス手続きを行う。
-PRACHコンフィギュレーションインデックスの取得
とりわけ、第2の実施形態の変形例では、情報取得部161は、上記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報をさらに取得する。
-PRACHコンフィギュレーションの通知
--PRACH
とりわけ第2の実施形態の変形例では、通信制御部163は、上記第2の情報(第2のPRACHコンフィギュレーションインデックス)から識別されるランダムアクセス用リソースであって、設定されているTDDコンフィギュレーションについての上記ランダムアクセス用リソースもさらに、PRACHとして使用する。即ち、通信制御部163は、第2のPRACHコンフィギュレーションインデックスから識別される上記ランダムアクセス用リソースで無線通信部120により受信される信号もさらに、UEからのランダムアクセスプリアンブルとして取り扱う。
-PRACHコンフィギュレーションインデックスの取得
とりわけ第2の実施形態では、情報取得部271は、上記第1の情報がeNodeB100-2により報知され、上記第2の情報がeNodeB100-2により通知される場合に、上記第2の情報を取得する。例えば、第1のPRACHコンフィギュレーションインデックスがeNodeB100-2により報知され、第2のPRACHコンフィギュレーションインデックスがeNodeB100-2により通知される。この場合に、情報取得部271は、無線通信部220を介して、第2のPRACHコンフィギュレーションインデックスを取得する。
-ランダムアクセス手続き
とりわけ第2の実施形態の変形例では、通信制御部273は、上記第2の情報から識別されるランダムアクセス用リソースであって、上記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての上記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行う。
第2の実施形態の変形例に係るeNodeB側の通信制御処理は、PRACHコンフィギュレーションインデックスの内容が相違することを除き、図14及び図15を参照して説明した第1の実施形態に係るeNodeB側の通信制御処理と同様である。
続いて、図25~図27を参照して、本開示の第3の実施形態を説明する。
まず、図25及び図26を参照して、第3の実施形態に係るeNodeB100-3の概略的な機能構成を説明する。図25は、第3の実施形態に係るeNodeB100-3の機能構成の一例を示すブロック図である。図25を参照すると、eNodeB100-3は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部140及び処理部170を含む。
処理部170は、eNodeB100-3の様々な機能を提供する。処理部170は、情報取得部171及び通信制御部173を含む。
情報取得部171は、通信制御部173による制御に必要な情報を取得する。例えば、情報取得部171は、無線通信部120を介して、他の装置からの情報を取得する。また、例えば、情報取得部171は、記憶部140に記憶されている情報を取得する。
PRACHコンフィギュレーションインデックスの取得については、情報取得部171は、第2の実施形態に係る情報取得部161と同様に動作する。例えば、情報取得部171は、第1のPRACHコンフィギュレーションインデックスを取得する。
とりわけ第3の実施形態では、上記第1の情報から識別される、上記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、上記複数のTDDコンフィギュレーションのいずれが設定される場合にもアップリンクリソースである。以下、この点について、図26を参照して具体例を説明する。
通信制御部173は、セル10内での無線通信を制御する。
PRACHコンフィギュレーションの報知については、通信制御部173は、第2の実施形態に係る通信制御部163と同様に動作する。
TDDコンフィギュレーションの設定、並びに、TDDコンフィギュレーションの報知及び通知については、通信制御部173は、第2の実施形態に係る通信制御部163と同様に動作する。
通信制御部173は、無線リソースの制御を行う。
とりわけ第3の実施形態では、通信制御部173は、上記複数のTDDコンフィギュレーションのいずれが設定される場合にも、上記第1の情報から識別される、上記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを、ランダムアクセスチャネルとして使用する。即ち、通信制御部173は、第1のPRACHコンフィギュレーションインデックスから識別されるいずれのランダムアクセス用リソースで無線通信部120により受信される信号でも、UEからのランダムアクセスプリアンブルとして取り扱う。
UEへの無線リソースの割当てについては、通信制御部173は、第2の実施形態に係る通信制御部163と同様に動作する。
ここで、TDDコンフィギュレーションの設定と、当該設定に伴うランダムアクセス用リソースとの具体例を、図12を再び参照して説明する。なお、ここでは、図26を参照して説明したように、PRACHコンフィギュレーションインデックス5がシステム情報の中で報知されるものとする。
第3の実施形態に係るUE200-3の機能構成は、第2の実施形態に係るUE200-2の機能構成と同様である。なお、第3の実施形態と第2の実施形態との間の相違点は、eNodeB100により報知され、UE200により取得される第1の情報(第1のPRACHコンフィギュレーションインデックス)の内容のみである。
第3の実施形態に係るeNodeB側の通信制御処理は、第1のPRACHコンフィギュレーションインデックスの内容が相違することを除き、第2の実施形態に係るeNodeB側の通信制御処理(又は、図14を参照して説明した第1の実施形態に係るeNodeB側の第1の通信制御処理)と同様である。
次に、図27を参照して、第3の実施形態の変形例を説明する。第3の実施形態の変形例では、第1のPRACHコンフィギュレーションインデックスが報知されることに加えて、第2のPRACHコンフィギュレーションインデックスが通知される。そして、UE200(非レガシーUE)は、第2のPRACHコンフィギュレーションインデックスから識別される、設定されているTDDコンフィギュレーションについてのランダムアクセス用リソースを使用して、ランダムアクセス手続きを行う。
-PRACHコンフィギュレーションインデックスの取得
とりわけ、第3の実施形態の変形例では、情報取得部171は、上記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報をさらに取得する。
-PRACHコンフィギュレーションの通知
PRACHコンフィギュレーションの通知については、通信制御部173は、第2の実施形態の変形例に係る通信制御部163と同様に動作する。
--PRACH
とりわけ第3の実施形態の変形例では、通信制御部173は、上記第2の情報(第2のPRACHコンフィギュレーションインデックス)から識別されるランダムアクセス用リソースであって、設定されているTDDコンフィギュレーションについての上記ランダムアクセス用リソースもさらに、PRACHとして使用する。即ち、通信制御部163は、第2のPRACHコンフィギュレーションインデックスから識別される上記ランダムアクセス用リソースで無線通信部120により受信される信号もさらに、UEからのランダムアクセスプリアンブルとして取り扱う。
第3の実施形態の変形例に係るUE200-3の機能構成は、第2の実施形態の変形例に係るUE200-2の機能構成と同様である。なお、第3の実施形態の変形例と第2の実施形態の変形例との間の相違点は、eNodeB100により報知され、UE200により取得される第1の情報(第1のPRACHコンフィギュレーションインデックス)の内容のみである。
第3の実施形態の変形例に係るeNodeB側の通信制御処理は、PRACHコンフィギュレーションインデックスの内容が相違することを除き、第2の実施形態の変形例に係るeNodeB側の通信制御処理(又は、図14及び図15を参照して説明した第1の実施形態に係るeNodeB側の通信制御処理)と同様である。
続いて、図28~図30を参照して、本開示の第4の実施形態を説明する。
まず、図28及び図29を参照して、第4の実施形態に係るeNodeB100-4の概略的な機能構成を説明する。図28は、第4の実施形態に係るeNodeB100-4の機能構成の一例を示すブロック図である。図28を参照すると、eNodeB100-4は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部140及び処理部180を含む。
処理部180は、eNodeB100-4の様々な機能を提供する。処理部180は、情報取得部181及び通信制御部183を含む。
情報取得部181は、通信制御部183による制御に必要な情報を取得する。例えば、情報取得部181は、無線通信部120を介して、他の装置からの情報を取得する。また、例えば、情報取得部181は、記憶部140に記憶されている情報を取得する。
PRACHコンフィギュレーションインデックスの取得については、情報取得部181は、第2の実施形態に係る情報取得部161と同様に動作する。例えば、情報取得部181は、第1のPRACHコンフィギュレーションインデックスを取得する。
第4の実施形態では、上記第1のPRACHコンフィギュレーションインデックスは、任意のPRACHコンフィギュレーションインデックスである。以下、図29を参照して、第1のPRACHコンフィギュレーションの具体例を説明する。
とりわけ第4の実施形態では、情報取得部181は、複数のTDDコンフィギュレーションのうちの設定されるTDDコンフィギュレーションについてのランダムアクセス用リソースの情報を取得する。
通信制御部183は、セル10内での無線通信を制御する。
PRACHコンフィギュレーションの報知については、通信制御部183は、第2の実施形態に係る通信制御部163と同様に動作する。
TDDコンフィギュレーションの設定、並びに、TDDコンフィギュレーションの報知及び通知については、通信制御部183は、第2の実施形態に係る通信制御部163と同様に動作する。
通信制御部183は、無線リソースの制御を行う。
PRACHの制御については、通信制御部183は、第2の実施形態に係る通信制御部163と同様に動作する。
通信制御部183は、無線リソースをUE(UE20及びUE200)に割り当てる。例えば、通信制御部183は、設定されているTDDコンフィギュレーションに従って、ダウンリンクサブフレームのPDSCHの無線リソースを、UEに割り当てる。また、通信制御部153は、設定されているTDDコンフィギュレーションに従って、アップリンクサブフレームのPUSCHの無線リソースを、UEに割り当てる。
次に、図30を参照して、第4の実施形態に係る通信制御処理の例を説明する。図30は、第4の実施形態に係るeNodeB側の通信制御処理の概略的な流れの一例を示すフローチャートである。
続いて、図31及び図32を参照して、本開示の第5の実施形態を説明する。
まず、図31を参照して、第5の実施形態に係るeNodeB100-5の概略的な機能構成を説明する。図31は、第5の実施形態に係るeNodeB100-5の機能構成の一例を示すブロック図である。図31を参照すると、eNodeB100-5は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部140及び処理部190を含む。
処理部190は、eNodeB100-5の様々な機能を提供する。処理部190は、情報取得部191及び通信制御部193を含む。
情報取得部191は、通信制御部193による制御に必要な情報を取得する。例えば、情報取得部191は、無線通信部120を介して、他の装置からの情報を取得する。また、例えば、情報取得部191は、記憶部140に記憶されている情報を取得する。
とりわけ第5の実施形態では、情報取得部191は、TDDコンフィギュレーションが新たに設定されると、TDDコンフィギュレーションの新たな設定に関する情報を取得する。一例として、当該情報は、TDDコンフィギュレーションの新たに設定されることを示す情報である。
PRACHコンフィギュレーションインデックスの取得については、情報取得部191は、第4の実施形態に係る情報取得部181と同様に動作する。例えば、情報取得部191は、第1のPRACHコンフィギュレーションインデックスを取得する。
第1のPRACHコンフィギュレーションインデックスの内容については、第4の実施形態と同様である。即ち、第1のPRACHコンフィギュレーションインデックスは、任意のPRACHコンフィギュレーションインデックスである。
通信制御部193は、セル10内での無線通信を制御する。
とりわけ第5の実施形態では、通信制御部193は、TDDコンフィギュレーションが新たに設定される場合に、所定の期間の間、UEによるランダムアクセス手続きを禁止する。
PRACHコンフィギュレーションの報知については、通信制御部193は、第4の実施形態に係る通信制御部183と同様に動作する。
TDDコンフィギュレーションの設定、並びに、TDDコンフィギュレーションの報知及び通知については、通信制御部193は、第4の実施形態に係る通信制御部183と同様に動作する。
通信制御部193は、無線リソースの制御を行う。
PRACHの制御については、通信制御部193は、第4の実施形態に係る通信制御部183と同様に動作する。
通信制御部193は、無線リソースをUE(UE20及びUE200)に割り当てる。例えば、通信制御部193は、設定されているTDDコンフィギュレーションに従って、ダウンリンクサブフレームのPDSCHの無線リソースを、UEに割り当てる。また、通信制御部193は、設定されているTDDコンフィギュレーションに従って、アップリンクサブフレームのPUSCHの無線リソースを、UEに割り当てる。
次に、図32を参照して、第5の実施形態に係る通信制御処理の例を説明する。図32は、第5の実施形態に係るeNodeB側の通信制御処理の概略的な流れの一例を示すフローチャートである。
本開示に係る技術は、様々な製品へ応用可能である。例えば、eNodeB100は、マクロeNodeB又はスモールeNodeBなどのいずれかの種類のeNodeB(evolved Node B)として実現されてもよい。スモールeNodeBは、ピコeNodeB、マイクロeNodeB又はホーム(フェムト)eNodeBなどの、マクロセルよりも小さいセルをカバーするeNodeBであってよい。eNodeB100は、無線通信を制御する本体(基地局装置ともいう)と、本体とは別の場所に配置される1つ以上のRRH(Remote Radio Head)とを含んでもよい。また、後述する様々な種類の端末が一時的に又は半永続的に基地局機能を実行することにより、eNodeB100として動作してもよい。
(第1の応用例)
図33は、本開示に係る技術が適用され得るeNBの概略的な構成の第1の例を示すブロック図である。eNB800は、1つ以上のアンテナ810、及び基地局装置820を有する。各アンテナ810及び基地局装置820は、RFケーブルを介して互いに接続され得る。
図34は、本開示に係る技術が適用され得るeNBの概略的な構成の第2の例を示すブロック図である。eNB830は、1つ以上のアンテナ840、基地局装置850、及びRRH860を有する。各アンテナ840及びRRH860は、RFケーブルを介して互いに接続され得る。また、基地局装置850及びRRH860は、光ファイバケーブルなどの高速回線で互いに接続され得る。
(第1の応用例)
図35は、本開示に係る技術が適用され得るスマートフォン900の概略的な構成の一例を示すブロック図である。スマートフォン900は、プロセッサ901、メモリ902、ストレージ903、外部接続インタフェース904、カメラ906、センサ907、マイクロフォン908、入力デバイス909、表示デバイス910、スピーカ911、無線通信インタフェース912、1つ以上のアンテナスイッチ915、1つ以上のアンテナ916、バス917、バッテリー918及び補助コントローラ919を備える。
図36は、本開示に係る技術が適用され得るカーナビゲーション装置920の概略的な構成の一例を示すブロック図である。カーナビゲーション装置920は、プロセッサ921、メモリ922、GPS(Global Positioning System)モジュール924、センサ925、データインタフェース926、コンテンツプレーヤ927、記憶媒体インタフェース928、入力デバイス929、表示デバイス930、スピーカ931、無線通信インタフェース933、1つ以上のアンテナスイッチ936、1つ以上のアンテナ937及びバッテリー938を備える。
ここまで、図9~図36を用いて、本開示の実施形態に係る通信装置及び各処理を説明した。
第1の実施形態によれば、情報取得部151は、複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報(第1のPRACHコンフィギュレーションインデックス)を取得する。また、情報取得部151は、上記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報(第2のPRACHコンフィギュレーションインデックス)を取得する。さらに、通信制御部153は、上記第1の情報を報知する。また、通信制御部153は、上記第2の情報を通知する。そして、上記第2の情報から識別される、上記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、上記第1の情報から識別される、上記複数のTDDコンフィギュレーションのいずれについてのランダムアクセス用リソースも包含する。
第2の実施形態によれば、情報取得部161は、複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報(第1のPRACHコンフィギュレーションインデックス)を取得する。さらに、通信制御部163は、上記第1の情報を報知する。そして、上記第1の情報から識別されるランダムアクセス用リソースは、上記複数のTDDコンフィギュレーションの間で共通である。
第3の実施形態によれば、情報取得部181は、複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報(第1のPRACHコンフィギュレーションインデックス)を取得する。さらに、通信制御部173は、上記第1の情報を報知する。そして、上記第1の情報から識別される、上記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、上記複数のTDDコンフィギュレーションのいずれが設定される場合にもアップリンクリソースである。
第4の実施形態によれば、情報取得部181は、複数のTDDコンフィギュレーションのうちの設定されるTDDコンフィギュレーションについてのランダムアクセス用リソースの情報を取得する。そして、通信制御部183は、TDDコンフィギュレーションが新たに設定される場合に、新たに設定される当該TDDコンフィギュレーションの前に設定されていた前回のTDDコンフィギュレーションについてのラインダムアクセス用リソースを、いずれのUEにも割り当てない。
第5の実施形態によれば、情報取得部191は、TDDコンフィギュレーションが新たに設定されると、TDDコンフィギュレーションの新たな設定に関する情報を取得する。通信制御部193は、TDDコンフィギュレーションが新たに設定される場合に、所定の期間の間、UEによるランダムアクセス手続きを禁止する。
(1)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報、及び、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報を取得する取得部と、
前記第1の情報を報知し、前記第2の情報を通知する通信制御部と、
を備え、
前記第2の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記第1の情報から識別される、前記複数のTDDコンフィギュレーションのいずれについてのランダムアクセス用リソースも包含する、
通信制御装置。
(2)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報を取得する取得部と、
前記第1の情報を報知する通信制御部と、
を備え、
前記第1の情報から識別されるランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションの間で共通である、
通信制御装置。
(3)
前記取得部は、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報をさらに取得し、
前記通信制御部は、前記第2の情報を通知する、
前記(2)に記載の通信制御装置。
(4)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報を取得する取得部と、
前記第1の情報を報知する通信制御部と、
を備え、
前記第1の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションのいずれが設定される場合にもアップリンクリソースである、
通信制御装置。
(5)
前記通信制御部は、前記複数のTDDコンフィギュレーションのいずれが設定される場合にも、前記第1の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを、ランダムアクセスチャネルとして使用する、前記(4)に記載の通信制御装置。
(6)
前記取得部は、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報をさらに取得し、
前記通信制御部は、前記第2の情報を通知する、
前記(4)又は(5)に記載の通信制御装置。
(7)
前記通信制御部は、システム情報の中で前記第1の情報を報知し、個別のシグナリングにより前記第2の情報を通知する、前記(1)、(3)及び(6)のうちのいずれか1項に記載の通信制御装置。
(8)
前記通信制御部は、動的に設定されるTDDコンフィギュレーションに従った無線通信を行うことが可能な端末装置に、個別のシグナリングにより前記第2の情報を通知する、前記(7)に記載の通信制御装置。
(9)
前記通信制御部は、システム情報の中で前記第1の情報を報知し、システム情報の中で前記第2の情報を通知する、前記(1)、(3)及び(6)のうちのいずれか1項に記載の通信制御装置。
(10)
前記複数のTDDコンフィギュレーションは、全てのTDDコンフィギュレーションのうちの、一部のTDDコンフィギュレーションである、前記(1)~(9)のいずれか1項に記載の通信制御装置。
(11)
前記複数のTDDコンフィギュレーションは、前記第1の情報が報知される場合に適用されないTDDコンフィギュレーションを含まない、前記(10)に記載の通信制御装置。
(12)
前記第1の情報は、物理ランダムアクセスチャネルのコンフィギュレーションに関するインデックス情報である、前記(1)~(11)のいずれか1項に記載の通信制御装置。
(13)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションのうちの設定されるTDDコンフィギュレーションについてのランダムアクセス用リソースの情報を取得する取得部と、
TDDコンフィギュレーションが新たに設定される場合に、新たに設定される当該TDDコンフィギュレーションの前に設定されていた前回のTDDコンフィギュレーションについてのラインダムアクセス用リソースを、いずれの端末装置にも割り当てない通信制御部と、
を備える通信制御装置。
(14)
前記通信制御部は、TDDコンフィギュレーションが新たに設定される場合に、所定の期間の間、前記前回のTDDコンフィギュレーションについてのラインダムアクセス用リソースをいずれの端末装置にも割り当てない、前記(13)に記載の通信制御装置。
(15)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表すTDDコンフィギュレーションが新たに設定されると、TDDコンフィギュレーションの新たな設定に関する情報を取得する取得部と、
TDDコンフィギュレーションが新たに設定される場合に、所定の期間の間、端末装置によるランダムアクセス手続きを禁止する通信制御部と、
を備える通信制御装置。
(16)
前記通信制御部は、ランダムアクセス手続きを禁止するための情報をシステム情報の中で報知することにより、前記ランダムアクセス手続きを禁止する、前記(15)に記載の通信制御装置。
(17)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報、及び、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報を取得することと、
前記第1の情報を報知し、前記第2の情報を通知することと、
を含み、
前記第2の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記第1の情報から識別される、前記複数のTDDコンフィギュレーションのいずれについてのランダムアクセス用リソースも包含する、
通信制御方法。
(18)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報を取得することと、
前記第1の情報を報知することと、
を含み、
前記第1の情報から識別されるランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションの間で共通である、
通信制御方法。
(19)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報を取得することと、
前記第1の情報を報知することと、
を備え、
前記第1の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションのいずれが設定される場合にもアップリンクリソースである、
通信制御方法。
(20)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションのうちの設定されるTDDコンフィギュレーションについてのランダムアクセス用リソースの情報を取得することと、
TDDコンフィギュレーションが新たに設定される場合に、新たに設定される当該TDDコンフィギュレーションの前に設定されていた前回のTDDコンフィギュレーションについてのラインダムアクセス用リソースを、いずれの端末装置にも割り当てないことと、
を含む通信制御方法。
(21)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表すTDDコンフィギュレーションが新たに設定されると、TDDコンフィギュレーションの新たな設定に関する情報を取得することと、
TDDコンフィギュレーションが新たに設定される場合に、新たに設定される当該TDDコンフィギュレーションの設定後の所定の期間の間、端末装置によるランダムアクセス手続きを禁止することと、
を含む通信制御方法。
(22)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、前記第2の情報を取得する取得部と、
前記第2の情報から識別されるランダムアクセス用リソースであって、前記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての前記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行う通信制御部と、
を備え、
前記第2の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記第1の情報から識別される、前記複数のTDDコンフィギュレーションのいずれについてのランダムアクセス用リソースも包含する、
端末装置。
(23)
所定のプログラムを記憶するメモリと、
前記所定のプログラムを実行可能なプロセッサと、
を備え、
前記所定のプログラムは、
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、前記第2の情報を取得することと、
前記第2の情報から識別されるランダムアクセス用リソースであって、前記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての前記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行うことと、
を実行させるためのプログラムであり、
前記第2の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記第1の情報から識別される、前記複数のTDDコンフィギュレーションのいずれについてのランダムアクセス用リソースも包含する、
情報処理装置。
(24)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、前記第2の情報を取得する取得部と、
前記第2の情報から識別されるランダムアクセス用リソースであって、前記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての前記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行う通信制御部と、
を備え、
前記第1の情報から識別されるランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションの間で共通である、
端末装置。
(25)
所定のプログラムを記憶するメモリと、
前記所定のプログラムを実行可能なプロセッサと、
を備え、
前記所定のプログラムは、
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、前記第2の情報を取得することと、
前記第2の情報から識別されるランダムアクセス用リソースであって、前記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての前記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行うことと、
を実行させるためのプログラムであり、
前記第1の情報から識別されるランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションの間で共通である、
情報処理装置。
(26)
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、前記第2の情報を取得する取得部と、
前記第2の情報から識別されるランダムアクセス用リソースであって、前記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての前記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行う通信制御部と、
を備え、
前記第1の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションのいずれが設定される場合にもアップリンクリソースである、
端末装置。
(27)
所定のプログラムを記憶するメモリと、
前記所定のプログラムを実行可能なプロセッサと、
を備え、
前記所定のプログラムは、
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、前記第2の情報を取得することと、
前記第2の情報から識別されるランダムアクセス用リソースであって、前記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての前記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行うことと、
を実行させるためのプログラムであり、
前記第1の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションのいずれが設定される場合にもアップリンクリソースである、
情報処理装置。
10 セル
20 UE(レガシーUE)
100 eNodeB
151、161、171、181、191 情報取得部
153、163、173、183、193 通信制御部
200 UE(非レガシーUE)
261、271 情報取得部
263、273 通信制御部
Claims (18)
- 時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報、及び、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報を取得する取得部と、
前記第1の情報を報知し、前記第2の情報を通知する通信制御部と、
を備え、
前記第2の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記第1の情報から識別される、前記複数のTDDコンフィギュレーションのいずれについてのランダムアクセス用リソースも包含する、
通信制御装置。 - 時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報を取得する取得部と、
前記第1の情報を報知する通信制御部と、
を備え、
前記第1の情報から識別されるランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションの間で共通である、
通信制御装置。 - 前記取得部は、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報をさらに取得し、
前記通信制御部は、前記第2の情報を通知する、
請求項2に記載の通信制御装置。 - 時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報を取得する取得部と、
前記第1の情報を報知する通信制御部と、
を備え、
前記第1の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションのいずれが設定される場合にもアップリンクリソースである、
通信制御装置。 - 前記通信制御部は、前記複数のTDDコンフィギュレーションのいずれが設定される場合にも、前記第1の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを、ランダムアクセスチャネルとして使用する、請求項4に記載の通信制御装置。
- 前記取得部は、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報をさらに取得し、
前記通信制御部は、前記第2の情報を通知する、
請求項4に記載の通信制御装置。 - 前記通信制御部は、システム情報の中で前記第1の情報を報知し、個別のシグナリングにより前記第2の情報を通知する、請求項1に記載の通信制御装置。
- 前記通信制御部は、動的に設定されるTDDコンフィギュレーションに従った無線通信を行うことが可能な端末装置に、個別のシグナリングにより前記第2の情報を通知する、請求項7に記載の通信制御装置。
- 前記通信制御部は、システム情報の中で前記第1の情報を報知し、システム情報の中で前記第2の情報を通知する、請求項1に記載の通信制御装置。
- 前記複数のTDDコンフィギュレーションは、全てのTDDコンフィギュレーションのうちの、一部のTDDコンフィギュレーションである、請求項1に記載の通信制御装置。
- 前記複数のTDDコンフィギュレーションは、前記第1の情報が報知される場合に適用されないTDDコンフィギュレーションを含まない、請求項10に記載の通信制御装置。
- 前記第1の情報は、物理ランダムアクセスチャネルのコンフィギュレーションに関するインデックス情報である、請求項1に記載の通信制御装置。
- 時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、前記第2の情報を取得する取得部と、
前記第2の情報から識別されるランダムアクセス用リソースであって、前記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての前記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行う通信制御部と、
を備え、
前記第2の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記第1の情報から識別される、前記複数のTDDコンフィギュレーションのいずれについてのランダムアクセス用リソースも包含する、
端末装置。 - 所定のプログラムを記憶するメモリと、
前記所定のプログラムを実行可能なプロセッサと、
を備え、
前記所定のプログラムは、
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、前記第2の情報を取得することと、
前記第2の情報から識別されるランダムアクセス用リソースであって、前記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての前記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行うことと、
を実行させるためのプログラムであり、
前記第2の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記第1の情報から識別される、前記複数のTDDコンフィギュレーションのいずれについてのランダムアクセス用リソースも包含する、
情報処理装置。 - 時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、前記第2の情報を取得する取得部と、
前記第2の情報から識別されるランダムアクセス用リソースであって、前記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての前記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行う通信制御部と、
を備え、
前記第1の情報から識別されるランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションの間で共通である、
端末装置。 - 所定のプログラムを記憶するメモリと、
前記所定のプログラムを実行可能なプロセッサと、
を備え、
前記所定のプログラムは、
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、前記第2の情報を取得することと、
前記第2の情報から識別されるランダムアクセス用リソースであって、前記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての前記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行うことと、
を実行させるためのプログラムであり、
前記第1の情報から識別されるランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションの間で共通である、
情報処理装置。 - 時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、前記第2の情報を取得する取得部と、
前記第2の情報から識別されるランダムアクセス用リソースであって、前記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての前記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行う通信制御部と、
を備え、
前記第1の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションのいずれが設定される場合にもアップリンクリソースである、
端末装置。 - 所定のプログラムを記憶するメモリと、
前記所定のプログラムを実行可能なプロセッサと、
を備え、
前記所定のプログラムは、
時分割複信(TDD)方式の無線フレームにおけるサブフレーム単位でのリンク方向をそれぞれ表す複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第1の情報が基地局により報知され、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースを識別するための第2の情報が基地局により通知される場合に、前記第2の情報を取得することと、
前記第2の情報から識別されるランダムアクセス用リソースであって、前記複数のTDDコンフィギュレーションのうちの設定されているTDDコンフィギュレーションについての前記ランダムアクセス用リソースを使用して、ランダムアクセス手続きを行うことと、
を実行させるためのプログラムであり、
前記第1の情報から識別される、前記複数のTDDコンフィギュレーションの各々についてのランダムアクセス用リソースは、前記複数のTDDコンフィギュレーションのいずれが設定される場合にもアップリンクリソースである、
情報処理装置。
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CN201480027840.5A CN105393619B (zh) | 2013-05-22 | 2014-04-09 | 通信控制器、通信控制方法、终端装置以及信息处理设备 |
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US14/891,355 US10098155B2 (en) | 2013-05-22 | 2014-04-09 | Communication control device, communication control method, terminal communication control device, communication control method, terminal device, and information processing apparatus |
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EP3001747B1 (en) | 2018-09-12 |
US20160113037A1 (en) | 2016-04-21 |
TW201503736A (zh) | 2015-01-16 |
JP6361653B2 (ja) | 2018-07-25 |
US10098155B2 (en) | 2018-10-09 |
EP3001747A4 (en) | 2017-01-04 |
CN105393619B (zh) | 2019-11-15 |
JPWO2014188811A1 (ja) | 2017-02-23 |
EP3001747A1 (en) | 2016-03-30 |
TWI642321B (zh) | 2018-11-21 |
CN105393619A (zh) | 2016-03-09 |
ES2695198T3 (es) | 2019-01-02 |
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