WO2012111596A1 - Communication system, base station device, mobile station device, method for reporting power headroom, and integrated circuit - Google Patents
Communication system, base station device, mobile station device, method for reporting power headroom, and integrated circuit Download PDFInfo
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- WO2012111596A1 WO2012111596A1 PCT/JP2012/053238 JP2012053238W WO2012111596A1 WO 2012111596 A1 WO2012111596 A1 WO 2012111596A1 JP 2012053238 W JP2012053238 W JP 2012053238W WO 2012111596 A1 WO2012111596 A1 WO 2012111596A1
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- station apparatus
- mobile station
- serving cell
- base station
- transmission timing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/365—Power headroom reporting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
Definitions
- the present invention provides a communication system in which a mobile station apparatus efficiently reports power headroom when a plurality of uplink transmission timing adjustments are required, a base station apparatus and a mobile station apparatus directed to the communication system,
- the present invention relates to a power headroom reporting method and an integrated circuit.
- EUTRA Evolved Universal Terrestrial Radio Access
- 3GPP 3rd Generation Partnership Project
- EUTRA Evolved Universal Terrestrial Radio Access
- high-speed communication is realized by adopting an OFDM (Orthogonal Frequency-Division Multiplexing) communication method and adopting flexible scheduling called a resource block in a predetermined frequency / time unit.
- OFDM Orthogonal Frequency-Division Multiplexing
- Carrier aggregation has been proposed as a technology in Advanced EUTRA.
- Carrier aggregation is a technique for improving a transmission rate by using a plurality of different frequencies (hereinafter, also referred to as “component carriers”) in an aggregate manner.
- component carriers a mobile station apparatus communicating with a base station apparatus has a plurality of uplink transmission timings (Timing Advance) for each frequency or component carrier using carrier aggregation (Non-patent Document). 1).
- a random access procedure is prepared to adjust the uplink transmission timing of the mobile station apparatus.
- the base station apparatus causes the specific mobile station apparatus to start the random access procedure.
- information indicating the start of a random access procedure is set in the physical downlink control channel and transmitted.
- a power headroom (hereinafter also referred to as “PHR”) for notifying the base station device of the remaining power of the transmission power of the mobile station device is used.
- the PHR is obtained by subtracting the transmission power required for the physical uplink shared channel or the transmission power required for the physical uplink shared channel and the physical uplink control channel from the maximum transmission power of the mobile station apparatus in a certain component carrier. It represents the remaining power (remaining power of transmission power).
- a larger PHR indicates that there is a margin in uplink transmission of the mobile station apparatus that is the report source.
- the base station apparatus may execute appropriate scheduling such as designating a modulation scheme with a high transmission rate and allocating more resources to the reporting mobile station apparatus with reference to the reported PHR. it can.
- Non-Patent Document 2 describes a conventional PHR calculation method.
- the base station apparatus configures one cell by combining one downlink component carrier and one uplink component carrier. Note that the base station apparatus can configure one cell with only one downlink component carrier.
- the transmission timing has a plurality of uplink transmission timings, and each uplink transmission timing is set for each uplink component carrier (or uplink component carrier group and / or uplink frequency).
- each uplink transmission timing is set for each uplink component carrier (or uplink component carrier group and / or uplink frequency).
- the component carrier When the component carrier is activated, there is a component carrier that cannot be transmitted because the uplink transmission timing is not adjusted. This means that even if the mobile station apparatus reports PHR of a component carrier that cannot be transmitted, the base station apparatus cannot perform scheduling using the component carrier.
- Non-Patent Document 1 a specific solution for the problem that the mobile station device reports the PHR of the component carrier that cannot be scheduled by the base station device is Non-Patent Document 1 and Non-Patent Document 2 do not show anything.
- an object of the present invention is directed to a communication system that enables efficient power headroom reporting by a mobile station apparatus when adjustment of a plurality of uplink transmission timings is necessary.
- a communication system that reports power headroom indicating the remaining power of transmission power of a plurality of serving cells to which a mobile station apparatus is connected to a base station apparatus.
- the plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated.
- Second serving cell The base station device activates the second serving cell set in the mobile station device.
- the uplink transmission timing of the second serving cell activated by the base station device has been adjusted based on the transmission timing adjustment information related to the second serving cell received from the base station device. Sometimes it is determined that the power headroom reporting trigger condition has been met.
- the base station device notifies the transmission timing adjustment information using the Contention based Random Access procedure.
- the base station apparatus notifies transmission timing adjustment information using a non-contention based Random Access procedure.
- the mobile station apparatus when the mobile station apparatus determines that the trigger condition for power headroom reporting is satisfied, the mobile station apparatus activates a plurality of serving cells and adjusts the uplink transmission timing. Based on the above, the serving cell reporting the power headroom is determined.
- the mobile station apparatus reports to the base station apparatus the power headroom of the second serving cell in which the mobile station apparatus is activated and the uplink transmission timing is adjusted.
- the plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated.
- Second serving cell The base station device activates the second serving cell set in the mobile station device.
- the mobile station apparatus executes the random access procedure in the second serving cell activated by the base station apparatus, and whether or not the trigger condition for power headroom reporting is satisfied based on the success or failure of the random access procedure Determine whether.
- the random access procedure is the Contention based Random Access procedure
- the mobile station apparatus determines whether the trigger condition of the power headroom is based on whether or not the contention resolution is correctly received. Determine if it is satisfied.
- the random access procedure is a Non-contention based Random Access procedure
- the mobile station apparatus determines whether the power headroom trigger condition is based on whether or not the random access response is correctly received. Determine if it is satisfied.
- the mobile station apparatus when the mobile station apparatus determines that the trigger condition for power headroom reporting is satisfied, the mobile station apparatus activates a plurality of serving cells and adjusts the uplink transmission timing. Based on the above, the serving cell reporting the power headroom is determined.
- the mobile station apparatus reports to the base station apparatus the power headroom of the second serving cell in which the mobile station apparatus is activated and the uplink transmission timing is adjusted.
- a mobile station apparatus in a communication system that reports to a base station apparatus a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station apparatus is connected. Is done.
- the plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated.
- Second serving cell In the mobile station device, the uplink transmission timing of the second serving cell activated by the base station device has been adjusted based on the transmission timing adjustment information related to the second serving cell received from the base station device. Sometimes it is determined that the power headroom reporting trigger condition has been met.
- the mobile station apparatus receives transmission timing adjustment information from the base station apparatus using a Contention based Random Access procedure.
- the mobile station apparatus receives transmission timing adjustment information from the base station apparatus using a non-contention based Random Access procedure.
- the mobile station apparatus When it is determined that the power headroom report trigger condition is satisfied, the mobile station apparatus according to the present embodiment is based on the activation state of a plurality of serving cells and the uplink transmission timing adjustment state. Determine the serving cell reporting power headroom.
- the mobile station apparatus reports to the base station apparatus the power headroom of the second serving cell that is activated and whose uplink transmission timing is in an adjusted state.
- a mobile station apparatus in a communication system that reports to a base station apparatus a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station apparatus is connected. Is done.
- the plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated.
- Second serving cell The mobile station apparatus executes the random access procedure in the second serving cell activated by the base station apparatus, and whether or not the trigger condition for power headroom reporting is satisfied based on the success or failure of the random access procedure Determine whether.
- the mobile station apparatus determines whether the power headroom trigger condition is satisfied based on whether the contention resolution is correctly received. Determine whether.
- the mobile station apparatus determines whether the power headroom trigger condition is satisfied based on whether the random access response is correctly received. Determine whether.
- the mobile station apparatus When it is determined that the power headroom report trigger condition is satisfied, the mobile station apparatus according to the present embodiment is based on the activation state of a plurality of serving cells and the uplink transmission timing adjustment state. Determine the serving cell reporting power headroom.
- the mobile station apparatus reports to the base station apparatus the power headroom of the second serving cell that is activated and whose uplink transmission timing is in an adjusted state.
- a base station apparatus in a communication system that reports to a base station apparatus a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station apparatus is connected. Is done.
- the plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated.
- Second serving cell The base station device activates the second serving cell set in the mobile station device, transmits transmission timing adjustment information related to the activated second serving cell to the mobile station device, and sets the second serving cell of the second serving cell.
- the mobile station apparatus is caused to determine that the trigger condition for reporting the power headroom is satisfied.
- a base station apparatus in a communication system that reports to a base station apparatus a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station apparatus is connected. Is done.
- the plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated.
- Second serving cell The base station apparatus activates the second serving cell set in the mobile station apparatus and causes the mobile station apparatus to execute a random access procedure for the activated second serving cell, thereby causing the mobile station apparatus to perform random access. Based on the success or failure of the access procedure, it is determined whether the trigger condition for power headroom reporting has been met.
- a power headroom reporting method in a communication system for reporting to a base station device a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station device is connected Is provided.
- the plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated.
- the base station device activates the second serving cell set in the mobile station device.
- the uplink transmission timing of the second serving cell activated by the base station device has been adjusted based on the transmission timing adjustment information related to the second serving cell received from the base station device. Sometimes it is determined that the power headroom reporting trigger condition has been met.
- a power headroom reporting method in a communication system for reporting to a base station device a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station device is connected Is provided.
- the plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated.
- the base station device activates the second serving cell set in the mobile station device.
- the mobile station apparatus executes the random access procedure in the second serving cell activated by the base station apparatus, and whether or not the trigger condition for power headroom reporting is satisfied based on the success or failure of the random access procedure Determine whether.
- a mobile station apparatus in a communication system that reports to a base station apparatus a power headroom indicating the remaining transmission power of a plurality of serving cells connected to the mobile station apparatus.
- An integrated circuit is provided.
- the plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated.
- Second serving cell In the integrated circuit, when the uplink transmission timing of the second serving cell activated by the base station apparatus is in an adjustment state based on the transmission timing adjustment information regarding the second serving cell received from the base station apparatus And the power headroom reporting trigger condition is satisfied.
- a mobile station apparatus in a communication system that reports to a base station apparatus a power headroom indicating the remaining transmission power of a plurality of serving cells connected to the mobile station apparatus.
- An integrated circuit is provided.
- the plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated.
- Second serving cell The integrated circuit performs a random access procedure in the second serving cell activated by the base station apparatus, and whether or not a trigger condition for power headroom reporting is satisfied based on the success or failure of the random access procedure Judging.
- the present invention is intended to improve a communication system, a base station apparatus, a mobile station apparatus, a power headroom reporting method, and an integrated circuit when a mobile station apparatus and a base station apparatus are connected using a plurality of frequencies simultaneously.
- a communication system to which the present invention is applicable is not limited to a communication system that is upward compatible with EUTRA, such as EUTRA or Advanced EUTRA.
- EUTRA EUTRA
- the present invention can also be applied to UMTS (Universal Mobile Telecommunications System).
- a mobile station apparatus that can be connected to a base station apparatus using a plurality of frequencies needs to adjust a plurality of uplink transmission timings, an efficient power It is possible to provide a communication system capable of reporting headroom, a base station apparatus and mobile station apparatus directed to the communication system, a power headroom reporting method, and an integrated circuit.
- Carrier aggregation is a technology that aggregates (aggregates) a plurality of different frequencies (component carriers or frequency bands) and treats them as one frequency (frequency band). For example, when five component carriers having a frequency bandwidth of 20 MHz are aggregated by carrier aggregation, the mobile station apparatus can access them by regarding these as one frequency bandwidth of 100 MHz.
- the component carriers to be aggregated may be continuous frequencies, or may be frequencies at which all or part of them are discontinuous. For example, when the usable frequency is in the 800 MHz band, 2.4 GHz band, and 3.4 GHz band, one component carrier is transmitted in the 800 MHz band, another component carrier is transmitted in the 2 GHz band, and another component carrier is transmitted in the 3.4 GHz band. May be.
- the base station apparatus determines the number of uplink or downlink component carriers to be allocated to the mobile station apparatus based on various factors such as the amount of data buffer remaining, the reception quality of the mobile station apparatus, the load in the cell and the QoS. You can increase or decrease the number. Note that the number of uplink component carriers assigned by the base station apparatus is preferably equal to or less than the number of downlink component carriers.
- a channel means a medium used for signal transmission
- a physical channel means a physical medium used for signal transmission.
- the physical channel may be added or changed in the future in EUTRA and / or Advanced EUTRA, but even if it is changed, the content of the embodiment according to the present invention is not affected.
- Radio frames In EUTRA and Advanced EUTRA, physical channel scheduling is managed using radio frames.
- One radio frame is 10 ms, and one radio frame is composed of 10 subframes. Further, one subframe is composed of two slots (that is, one slot is 0.5 ms).
- management is performed using resource blocks as the minimum scheduling unit in which physical channels are arranged.
- the resource block is defined by a constant frequency region composed of a set of a plurality of subcarriers (for example, 12 subcarriers) and a time region composed of a constant transmission time interval (1 slot).
- Synchronization signals are composed of three types of primary synchronization signals and secondary synchronization signals composed of 31 types of codes arranged alternately in the frequency domain.
- a combination of the primary synchronization signal and the secondary synchronization signal indicates 504 cell identifiers (cell ID: Physical Cell Identity; PCI) for identifying the base station apparatus and frame timing for radio synchronization.
- the mobile station device identifies the cell ID of the received synchronization signal by cell search.
- the physical broadcast information channel (PBCH; Physical Broadcast Channel) is transmitted for the purpose of notifying control parameters (broadcast information (system information: System information)) commonly used in mobile station apparatuses in the cell. Broadcast information that is not notified in the physical broadcast information channel is transmitted in a layer 3 message (system information) through the physical downlink shared channel after the radio resource used for transmission is notified in the physical downlink control channel.
- a cell global identifier (CGI; Cell Global Identifier) indicating a cell-specific identifier, a tracking area identifier (TAI; Tracking Area Identifier) for managing a paging standby area, random access control information, and the like are notified.
- CGI Cell Global Identifier
- TAI Tracking Area Identifier
- the downlink reference signal is a pilot signal transmitted at a predetermined power for each cell.
- the downlink reference signal is a known signal that is periodically repeated at a frequency and a time position according to a predetermined rule.
- the mobile station apparatus measures the reception quality for each cell by receiving the downlink reference signal.
- the mobile station apparatus also uses the downlink reference signal as a reference signal for simultaneous demodulation of the physical downlink control channel or the physical downlink shared channel that is transmitted simultaneously with the downlink reference signal.
- As a sequence used for the downlink reference signal a sequence that can be identified for each cell is used.
- the downlink reference signal may be described as a cell-specific RS (Cell-specific reference signals), but its use and meaning are the same.
- a physical downlink control channel (PDCCH; Physical Downlink Control Channel) is transmitted in several OFDM symbols from the top of each subframe, and radio resource allocation information according to the scheduling of the base station apparatus is transmitted to the mobile station apparatus. It is used for the purpose of instructing the adjustment amount of increase / decrease of transmission power.
- the mobile station apparatus monitors (monitors) the physical downlink control channel addressed to itself before transmitting / receiving downlink data or layer 3 messages (paging, handover command, etc.) that are downlink control data.
- receiving the physical downlink control channel addressed to the station it is necessary to acquire from the physical downlink control channel each radio resource allocation information called uplink grant during transmission and downlink grant (downlink assignment) during reception There is.
- the physical uplink control channel (PUCCH; Physical Uplink Control Channel) includes a data acknowledgment confirmation (ACK / NACK: Acknowledgement / Negative Acknowledgement) and downlink propagation path information C (QQn): Q I It is used to notify a quality request (SR: Scheduling Request) that is an uplink radio resource request.
- PUCCH Physical Uplink Control Channel
- ACK / NACK Acknowledgement / Negative Acknowledgement
- QQn downlink propagation path information
- Q I It is used to notify a quality request (SR: Scheduling Request) that is an uplink radio resource request.
- the physical downlink shared channel (PDSCH; Physical Downlink Shared Channel) notifies the mobile station apparatus of not only downlink data but also broadcast information not included in the physical broadcast information channel as a layer 3 message that is downlink control data. Also used to do.
- the radio resource allocation information of the physical downlink shared channel is indicated by the physical downlink control channel.
- the physical uplink shared channel (PUSCH: Physical Uplink Shared Channel) mainly transmits uplink data and uplink control data, but can also include control data such as downlink reception quality and ACK / NACK. is there. Similarly to the physical downlink shared channel, the radio resource allocation information of the physical uplink shared channel is indicated by the physical downlink control channel.
- PUSCH Physical Uplink Shared Channel
- An uplink reference signal (uplink reference signal: Uplink Reference Signal; also referred to as an uplink pilot signal or an uplink pilot channel) includes a demodulation reference signal (DRS: Demodulation Reference Signal) and a sounding reference signal (SRS: Sounding Reference Signal). ).
- the demodulation reference signal is used by the base station apparatus to demodulate the physical uplink control channel PUCCH and / or the physical uplink shared channel PUSCH.
- the sounding reference signal is mainly used by the base station apparatus to estimate the uplink channel state.
- a physical random access channel is a channel used for notifying a preamble sequence and has a guard time.
- the preamble sequence is configured to represent 6-bit information by preparing 64 types of sequences.
- the physical random access channel is used as an access means from the mobile station apparatus to the base station apparatus.
- the mobile station device uses the physical random access channel to request radio resources from the base station device when the physical uplink control channel is not set, or to match the uplink transmission timing with the reception timing window of the base station device.
- Request transmission timing adjustment information also referred to as timing advance (TA)
- TA timing advance
- the mobile station apparatus transmits a preamble sequence using the radio resource for the physical random access channel set by the base station apparatus.
- the mobile station device When the mobile station device receives the transmission timing adjustment information, the mobile station device sets a transmission timing timer (TA timer) that measures the effective time of the transmission timing adjustment information, sets the transmission timing adjustment state during the effective time, and transmits the transmission timing outside the effective period
- TA timer transmission timing timer
- the state is managed as an unadjusted state (transmission timing unadjusted state).
- the other physical channels are not directly related to the embodiment of the present invention, and thus will not be described in detail.
- Random access procedure In this specification, a series of procedures relating to random access is referred to as a random access procedure.
- the random access procedure includes a contention based random access (contention based random access) procedure and a non-contention based random access (non-contention based random access) procedure.
- the Contention based Random Access procedure is a random access procedure in which preamble sequences transmitted by different mobile station apparatuses may collide.
- the Contention based Random Access procedure is typically used for initial access from a state in which the mobile station device is not connected (communication) to the base station device or from a state in which the mobile station device is connected to the base station device. This is used for a scheduling request for requesting uplink transmission resources.
- the collision of preamble sequences means that a plurality of mobile station apparatuses use the same preamble sequence and transmit physical random access channels using the same frequency and time resources. Note that a preamble sequence collision is also referred to as a random access collision.
- the Non-contention based Random Access procedure is a random access procedure in which no collision occurs in preamble sequences transmitted by different mobile station apparatuses.
- the non-contention based Random Access procedure is typically a state in which the mobile station device is connected (communication) with the base station device and the uplink is out of synchronization. Is started. The start of the Non-contention based Random Access procedure is instructed by an RRC (Radio Resource Control: Layer 3) layer message and control data of the physical downlink control channel PDCCH.
- RRC Radio Resource Control: Layer 3
- the preamble sequence (dedicated preamble) used in the Non-contention based Random Access procedure is individually notified from the base station apparatus to the mobile station apparatus.
- the preamble sequence used in the Contention based Random Access procedure is randomly selected by the mobile station apparatus from the preamble sequences that are not used as individual preambles during random access.
- the number of preamble sequences used in the Contention based Random Access procedure and the Non-contention based Random Access procedure is notified from the base station apparatus.
- the mobile station apparatus 1 selects a preamble sequence (random access preamble) selected based on the downlink radio channel state (path loss) and / or the size of the message 3 (message transmitted in step S3). It transmits to the apparatus 2 (step S1).
- the base station apparatus 2 calculates a transmission timing shift amount between the mobile station apparatus 1 and the base station apparatus 2 from the random access preamble, and returns a response to the random access preamble (random access response).
- the transmission timing adjustment information for adjusting the transmission timing deviation is transmitted to the mobile station apparatus 1 (step S2).
- the mobile station apparatus 1 confirms the content of the random access response, and when the random access response includes a preamble number corresponding to the transmitted random access preamble, the mobile station apparatus 1 determines the uplink transmission timing based on the transmission timing adjustment information. adjust. When adjusting the transmission timing, the mobile station apparatus 1 starts a transmission timing timer (TA timer) in which the adjusted transmission timing is valid. Also, the mobile station apparatus 1 transmits an upper layer message (upper layer message and / or RRC message) to the base station apparatus 2 in accordance with the scheduling information included in the random access response (step S3). The base station apparatus 2 transmits a collision confirmation message (contention resolution, contention resolution) to the mobile station apparatus 1 that has received the upper layer message of step S3 (step S4). This completes the procedure.
- TA timer transmission timing timer
- the mobile station apparatus 1 transmits an upper layer message (upper layer message and / or RRC message) to the base station apparatus 2 in accordance with the scheduling information included in the random access response (step S3).
- the base station apparatus 2 notifies the mobile station apparatus 1 of the number of the dedicated preamble and the number of the physical random access channel to be used (random access channel number) (random access preamble allocation) (step S11).
- the random access channel number is a number indicating a physical random access channel in which transmission of an individual preamble with a number notified from the base station apparatus 2 to the mobile station apparatus 1 is permitted. For example, one random access channel number indicates that a dedicated preamble may be transmitted on all physical random access channels, and another random access channel number indicates a dedicated preamble on every second physical random access channel in the time direction. Indicates that it may be sent.
- the mobile station apparatus 1 transmits a preamble sequence (individual preamble) corresponding to the designated number on the physical random access channel indicated by the random access channel number and permitted to transmit the dedicated preamble (step S12).
- the base station apparatus 2 calculates a transmission timing shift amount between the mobile station apparatus 1 and the base station apparatus 2 from the dedicated preamble, and transmits a response to the dedicated preamble (random access response) as a transmission timing.
- the transmission timing adjustment information for adjusting the deviation is transmitted to the mobile station apparatus 1 (step S13). This completes the procedure.
- the mobile station apparatus 1 performs the contention based random access procedure instead of the non-contention based random access procedure. In this case, the mobile station apparatus 1 completes the procedure according to the procedure of steps S1 to S4 in FIG.
- the power headroom is calculated by the mobile station device for each frequency (component carrier and / or cell) and notified to the base station device.
- the power headroom is calculated in the physical layer (layer 1) based on parameters set from the RRC layer and managed in the MAC layer.
- the physical layer notifies the MAC layer of the calculated power headroom value of each component carrier.
- the MAC layer of the mobile station apparatus determines that it is the power headroom reporting timing when any of the following trigger conditions is satisfied, and uses the MAC control element included in the control header portion of the data to determine the PHR. Is transmitted to the base station apparatus.
- the trigger condition is (1) when the PHR report prohibition timer (Prohibit PHR timer) is stopped, and when the path loss value of the serving cell is deteriorated by a predetermined value or more than when the previous PHR was reported, (2 ) When the PHR period timer expires, (3) when the PHR setting is changed, and (4) when the secondary cell is activated.
- the first report format (type 1) is a report format applied when only the physical uplink shared channel PUSCH can be transmitted in a subframe in which the mobile station apparatus is present.
- Type 1 PHR uses different PHR calculation methods for subframes transmitting PUSCH and subframes not transmitting PUSCH. This detailed calculation method follows the description of 3GPP TS36.213.
- the second report format (type 2) is a report format applied when the physical uplink control channel PUCCH and the physical uplink shared channel PUSCH can be transmitted simultaneously in a subframe in which the mobile station apparatus is present.
- Type 2 PHR uses different PHR calculation methods for subframes transmitting PUCCH and PUSCH simultaneously, subframes transmitting only PUSCH, and subframes transmitting only PUCCH. . This detailed calculation method follows the description of 3GPP TS36.213.
- the base station apparatus moves using a layer 3 message as to which of the type 1 and type 2 PHR report formats is to be used. Set for each station device.
- FIG. 3 is a diagram showing an example of a communication network configuration according to the embodiment of the present invention.
- the mobile station apparatus 1 can be wirelessly connected to the base station apparatus 2 by simultaneously using a plurality of frequencies (component carriers) Band1 to Band3 by carrier aggregation.
- one base station apparatus 2 has transmitting apparatuses 11 to 13 (and receiving apparatuses 21 to 23 (not shown)) for a plurality of frequencies, and each frequency is controlled by one.
- a configuration performed by the base station apparatus 2 is preferable from the viewpoint of simplification of control.
- the configuration of the base station apparatus 2 is not limited to FIG.
- the base station device 2 may be configured to transmit a plurality of frequencies with a single transmission device because the plurality of frequencies are continuous frequencies. Furthermore, a configuration in which transmission / reception timing differs for each frequency may be employed. The number of transmitters and receivers and the frequency at which transmission and reception can be performed may be different. The communicable range of each frequency controlled by the transmission device of the base station device 2 is regarded as a cell. At this time, the areas (cells) covered by the respective frequencies may have different widths and / or different shapes.
- the areas covered by the frequency of the component carrier configured by the base station apparatus 2 are each referred to as a cell, and this is the definition of the cell in the actually operated communication system.
- a cell the areas covered by the frequency of the component carrier configured by the base station apparatus 2 are each referred to as a cell, and this is the definition of the cell in the actually operated communication system.
- some of the component carriers used by carrier aggregation may be defined simply as additional radio resources rather than cells.
- it may be defined as an extended cell different from the conventional cell.
- the gist of the present invention is not affected.
- carrier aggregation is communication performed by a plurality of cells using a plurality of component carriers, and is also referred to as cell aggregation.
- the mobile station apparatus 1 may be wirelessly connected to the base station apparatus 2 via a relay station apparatus (or repeater) for each frequency. That is, the base station apparatus 2 in the embodiment according to the present invention can be replaced with a relay station apparatus.
- the third generation base station apparatus 2 defined by 3GPP is referred to as Node B (Node B), and the base station apparatus in EUTRA and Advanced EUTRA is referred to as E Node B (eNode B).
- the third-generation mobile station apparatus 1 defined by 3GPP is referred to as UE (User Equipment).
- the base station apparatus 2 manages cells that are areas in which the mobile station apparatus 1 can communicate.
- the cell is also referred to as a macro cell, a femto cell, a pico cell, or a nano cell depending on the size of an area that can communicate with the mobile station apparatus 1.
- the cell used for communication with the mobile station device 1 among the cells of the base station device 2 is a serving cell.
- the other cells are referred to as neighboring cells (Neighboring cells). That is, when the mobile station apparatus 1 and the base station apparatus 2 communicate using a plurality of cells using carrier aggregation, there are a plurality of serving cells.
- FIG. 4 shows the downlink component carrier and the uplink component carrier that the base station device 2 sets for the mobile station device 1 when the mobile station device 1 according to the embodiment of the present invention performs carrier aggregation. It is the figure which showed an example of the correspondence.
- the correspondence relationship between two downlink component carriers (downlink component carrier DL_CC1, downlink component carrier DL_CC2) and two uplink component carriers (uplink component carrier UL_CC1, uplink component carrier UL_CC2).
- the present invention is not limited to the case of two component carriers.
- the downlink component carrier DL_CC1 and the uplink component carrier UL_CC1, and the downlink component carrier DL_CC2 and the uplink component carrier UL_CC2 are respectively cell-specific connected (Cell Specific Linkage).
- the cell-specific connection is, for example, a correspondence relationship (linkage relationship) between uplink and downlink frequencies accessible to the base station device 2 when the mobile station device 1 is not carrier-aggregated.
- the part of the broadcast information (SIB2: System Information Block Type2) indicates the corresponding relationship.
- SIB2 System Information Block Type2
- the cell specific connection is also referred to as SIB2 linkage.
- the correspondence relationship between the uplink and downlink frequencies in the cell is explicitly indicated as frequency information in the broadcast information. Alternatively, when not explicitly instructed, the correspondence relationship is instructed implicitly by using information on the prescribed frequency difference between the uplink and the downlink uniquely determined for each operating frequency. In addition to these methods, other methods may be used as long as the correspondence relationship between uplink and downlink frequencies can be shown for each cell.
- the base station apparatus 2 individually sets the correspondence relationship between the downlink component carrier and the uplink component carrier for each mobile station apparatus 1 separately from the cell-specific connection (individual connection; UE Specific Linkage). It is also possible. At this time, the setting of the individual connection is indicated by an RRC message (layer 3 message). The base station apparatus 2 can also assign a plurality of settings (configurations) necessary for transmission of the physical random access channel for each uplink component carrier or each uplink frequency.
- a cell composed of an uplink component carrier in which radio resource request uplink control channel setting is performed and a downlink component carrier that is cell-specifically connected to the uplink component carrier is a primary cell (PCell: Primary cell). Called. Moreover, the cell comprised from component carriers other than a primary cell is called a secondary cell (SCell: Secondary cell). Although the primary cell is not subject to activation / inactivation control (that is, it is always considered to be activated), the secondary cell has a state of activation / inactivation. These state changes are performed based on a timer set in the mobile station apparatus 1 for each component carrier, in addition to being explicitly designated from the base station apparatus 2. The primary cell and the secondary cell are also collectively referred to as a serving cell.
- the activation or deactivation of the component carrier ie, activation or deactivation of the secondary cell
- an L2 (Layer 2) message that can be interpreted by a Layer 2 configuration task.
- activation or deactivation is controlled by a control command recognized by layer 2 after being decoded by the physical layer (layer 1).
- the L2 message in EUTRA and Advanced EUTRA is notified by a control command (MAC control element: MAC Control Element) interpreted in the MAC layer.
- the mobile station device 1 may stop monitoring the uplink grant and the downlink grant (downlink assignment) used for scheduling the deactivated component carrier (secondary cell). That is, monitoring of the physical downlink control channel may be stopped. Moreover, the mobile station apparatus 1 may stop the transmission of the uplink pilot channel called a sounding reference signal (SRS) regarding the uplink of the deactivated component carrier (secondary cell). Moreover, the mobile station apparatus 1 may stop transmission of a physical uplink control channel regarding the uplink of the deactivated component carrier (secondary cell). Moreover, the mobile station apparatus 1 may implement a measurement with a sampling rate lower than the activated state regarding the downlink of the deactivated component carrier (secondary cell).
- SRS sounding reference signal
- the present embodiment relates to a power headroom reporting method at the time of carrier aggregation of the mobile station apparatus 1, and particularly shows a power headroom reporting method when the mobile station apparatus 1 manages a plurality of uplink transmission timings.
- FIG. 5 is a block diagram showing a schematic configuration example of the mobile station apparatus 1 according to the first embodiment of the present invention.
- the mobile station apparatus 1 includes a reception unit 101, a demodulation unit 102, a decoding unit 103, a measurement processing unit 104, a control unit 105, a random access control unit 106, a coding unit 107, a modulation unit 108, a transmission unit 109, a timing management unit 110, An upper layer 111 and a PHR calculation unit 112 are included.
- the upper layer 111 includes RRC (Radio Resource Control) that performs radio resource control.
- the random access control unit 106 functions as a part of a MAC (Medium Access Control) layer that manages the data link layer.
- MAC Medium Access Control
- mobile station apparatus control information Prior to reception, mobile station apparatus control information is input from the upper layer 111 to the control unit 105, and control information related to reception is appropriately input to the reception unit 101, the demodulation unit 102, and the decoding unit 103 as reception control information.
- the mobile station apparatus control information is information necessary for radio communication control of the mobile station apparatus 1 configured by reception control information and transmission control information, and is set by the base station apparatus 2 and system parameters. Input to the control unit 105 as necessary. Further, the reception control information includes information such as reception timing, multiplexing method, and radio resource arrangement information regarding each channel in addition to information on the reception frequency band.
- the received signal is received by the receiving unit 101.
- the receiving unit 101 receives a signal in the frequency band specified by the reception control information.
- the received signal is input to the demodulation unit 102.
- Demodulation section 102 demodulates the received signal and inputs the demodulated signal to decoding section 103.
- the decoding unit 103 correctly decodes downlink data and downlink control data from the signal, and inputs each decoded data to the upper layer 111.
- the measurement processing unit 104 measures the measurement result of the downlink reference signal reception quality (SIR, SINR, RSRP, RSRQ, RSSI, path loss, etc.) for each cell (component carrier), the physical downlink control channel, or the physical downlink shared channel.
- SIR downlink reference signal reception quality
- Downlink measurement information is generated based on the measurement result of the reception error rate, and the downlink measurement information is input to the upper layer 111.
- the downlink measurement information is used in the upper layer 111 for detection of a radio link failure (Radio link failure) accompanied by radio link re-establishment and radio link monitoring (Radio link monitoring) accompanied by suspension of uplink transmission. It is done.
- the downlink measurement information of the measurement processing unit 104 is input to the PHR calculation unit 112.
- PHR control information including parameters necessary for PHR reporting is set by the upper layer 111.
- the PHR control information includes at least a plurality of timers related to PHR reporting (PHR reporting prohibition timer, PHR period timer), a PHR reporting format (type 1 or type 2), a difference value of change in path loss used for a trigger condition, and PHR. Includes offset values and coefficients for the calculation of.
- the PHR calculation unit 112 calculates the value of the power headroom for each activated component carrier (secondary cell) based on the set PHR control information, downlink measurement information, and uplink transmission state. Further, the PHR calculation unit 112 determines, for each subframe, whether the PHR trigger condition is satisfied based on the input downlink measurement information and the states of a plurality of timers included in the PHR control information. When the PHR calculation unit 112 determines that any of the trigger conditions of the PHR is satisfied, the transmission state of the uplink physical channel in the subframe at the time of the trigger, the set report format, and the downlink measurement The PHR value calculated based on the information is input to the upper layer 111.
- mobile station apparatus control information is input from the upper layer 111 to the control unit 105, and control information related to transmission is appropriately transmitted to the random access control unit 106, encoding unit 107, modulation unit 108, and transmission unit 109 as transmission control information.
- the transmission control information includes information such as encoding information, modulation information, transmission frequency band information, transmission timing for each channel, multiplexing method, and radio resource arrangement information as uplink scheduling information of the transmission signal.
- the random access control information is input from the upper layer 111 to the random access control unit 106.
- the random access control information includes preamble information, radio resource information for physical random access channel transmission, and the like.
- the upper layer 111 sets transmission timing adjustment information and a transmission timing timer used for adjusting the uplink transmission timing in the timing management unit 110 as necessary.
- the timing management unit 110 manages the uplink transmission timing state (transmission timing adjustment state or transmission timing non-adjustment state) based on the set information.
- the encoding unit 107 receives uplink data and uplink control data from the upper layer 111 and random access data information related to transmission of the physical random access channel from the random access control unit 106.
- the encoding unit 107 generates a preamble sequence transmitted through the physical random access channel based on the random access data information.
- the encoding unit 107 appropriately encodes each data according to the transmission control information and inputs the data to the modulation unit 108.
- the modulation unit 108 modulates the input from the coding unit 107.
- the transmission unit 109 maps the input from the modulation unit 108 to the frequency domain, converts the frequency domain signal into a time domain signal, and amplifies the power on a carrier wave of a predetermined frequency. Furthermore, the transmission unit 109 adjusts the uplink transmission timing according to the transmission timing adjustment information input from the timing management unit 110, and transmits.
- a physical uplink shared channel in which uplink control data is arranged typically constitutes a layer 3 message (radio resource control message; RRC message).
- RRC message radio resource control message
- FIG. 6 is a block diagram showing a schematic configuration example of the base station apparatus 2 according to the first embodiment of the present invention.
- the base station apparatus includes a reception unit 201, a demodulation unit 202, a decoding unit 203, a control unit 204, a coding unit 205, a modulation unit 206, a transmission unit 207, an upper layer 208, and a network signal transmission / reception unit 209.
- the upper layer 208 inputs the downlink data and the downlink control data to the encoding unit 205.
- the encoding unit 205 encodes the input data and inputs it to the modulation unit 206.
- Modulation section 206 modulates the encoded signal.
- the signal output from the modulation unit 206 is input to the transmission unit 207.
- Transmitter 207 maps the input signal to the frequency domain, converts the frequency domain signal into a time domain signal, performs power amplification on a predetermined frequency carrier wave, and transmits the signal.
- the physical downlink shared channel in which downlink control data is arranged typically constitutes a layer 3 message (RRC message).
- the receiving unit 201 converts the signal received from the mobile station device 1 into a baseband digital signal.
- the digital signal is input to the demodulation unit 202 and demodulated.
- the signal demodulated by the demodulation unit 202 is subsequently input to the decoding unit 203 and decoded, and the correctly decoded uplink control data and uplink data are input to the upper layer 208.
- the base station apparatus control information necessary for control of these blocks is information necessary for radio communication control of the base station apparatus 2 configured by reception control information and transmission control information. Gateway device) and system parameters, and the upper layer 208 inputs to the control unit 204 as necessary.
- the control unit 204 appropriately inputs base station apparatus control information related to transmission to each block of the encoding unit 205, modulation unit 206, and transmission unit 207 as transmission control information.
- the control unit 204 appropriately inputs base station apparatus control information related to reception to each block of the reception unit 201, the demodulation unit 202, and the decoding unit 203 as reception control information.
- the RRC of the base station device 2 exists as part of the upper layer 208.
- the network signal transmission / reception unit 209 transmits and / or receives control messages between the base station apparatuses 2 or between the host network apparatus and the base station apparatus 2.
- the other components of the base station apparatus 2 are not shown because they are not related to the present embodiment.
- the network configuration of the communication system in which the mobile station device 1 and the base station device 2 are arranged can be the same as that shown in FIG.
- the timing at which the mobile station apparatus 1 that manages a plurality of transmission timings can report PHR will be described with reference to FIG.
- the horizontal axis of FIG. 7 shows the history of time.
- the mobile station device 1 is started from a state in which at least one inactivated secondary cell is set from the base station device 2. Such a state can typically be regarded as a state after a new secondary cell is added or a state after the handover is performed. Further, the secondary cell requires uplink transmission timing different from that of the primary cell.
- Time T01 indicates that the mobile station apparatus 1 has received the activation command for the deactivated secondary cell.
- the activation command may be notified by a MAC control element as usual, or may be notified by an RRC message or a physical downlink control channel.
- the mobile station apparatus 1 applies the necessary settings accompanying the activation of the secondary cell, such as the downlink measurement processing of the activated secondary cell and, in some cases, transmission of an uplink reference signal in the uplink. Processing time is required.
- the mobile station apparatus 1 considers that the secondary cell is actually activated at time T02 when a delay time n1 (for example, 8 subframes) used for this processing time has elapsed.
- the time T02 coincides with the timing at which the random access procedure for the secondary cell can be started.
- the mobile station apparatus 1 starts a random access procedure in the secondary cell at any timing after time T02 and transmits a physical random access channel to the base station apparatus 2.
- the random access procedure is started in the latest subframe in which there is a random access resource that can be used by the mobile station apparatus 1 after time T02.
- the mobile station apparatus 1 receives a random access response from the base station apparatus 2 at time T03.
- the random access procedure is performed in the secondary cell.
- the timing at which the mobile station apparatus 1 starts the random access procedure in the secondary cell between the time T02 and the time T03 is, for example, (1) the same as the timing when the secondary cell is activated, (2) activation of the secondary cell When the start of random access is instructed later by the MAC control element, (3) when the start of random access is instructed by the physical downlink control channel PDCCH after the activation of the secondary cell, etc. are conceivable. In the present embodiment, any of the timings described above may be used.
- the mobile station apparatus 1 receives the random access response to acquire the uplink transmission timing (secondary cell uplink transmission timing) of the secondary cell cell.
- the mobile station device 1 needs a delay time n2 as a processing time for adjusting the uplink transmission timing of the secondary cell.
- the mobile station apparatus 1 determines that the power headroom report of the secondary cell is possible (PHR transmission is possible) after time T04 when the delay time n2 (for example, 4 subframes) has elapsed.
- the mobile station apparatus 1 starts the procedure similar to the case where the trigger conditions of PHR are satisfy
- the mobile station apparatus 1 of the present embodiment is when (1) the PHR report prohibition timer (Prohibit PHR timer) is stopped as a PHR trigger condition instead of the conventional EUTRA PHR trigger condition. (2) PHR period timer (Periodic PHR timer) when the path loss value of the primary cell or the transmission timing adjustment state and the activated secondary cell has deteriorated by more than a predetermined value than when the previous PHR was reported Is used, (3) when the PHR setting is changed, and (4) when the secondary cell is activated to enter the transmission timing adjustment state.
- the mobile station apparatus 1 transmits the PHR between the primary cell and the activated secondary cell in the transmission timing adjustment state to the base station apparatus 2 when any of the above-described PHR trigger conditions is satisfied.
- FIG. 8 is a sequence chart showing the exchange of signaling related to the power headroom report accompanying the activation of the secondary cell between the mobile station apparatus 1 and the base station apparatus 2 according to the present embodiment.
- the mobile station device 1 is started from a state in which at least one inactivated secondary cell is set from the base station device 2. Furthermore, the uplink transmission timing different from the primary cell is set for the secondary cell.
- step S101 an activation command for the secondary cell in the transmission timing non-adjusted state is notified from the base station apparatus 2.
- the activation command may be notified by a MAC control element as usual, or may be notified by an RRC message or a physical downlink control channel.
- the mobile station apparatus 1 determines a random access trigger as to whether or not to start the random access procedure for the activated secondary cell (step S102).
- the timing when the mobile station device 1 starts the random access procedure in the secondary cell is, for example, (1) the same as the timing when the secondary cell is activated, or (2) the random access procedure is performed by the MAC control element after the activation of the secondary cell.
- the start is instructed, (3) When the start of the random access procedure is instructed on the physical downlink control channel PDCCH after the activation of the secondary cell, (4) The layer 3 message (RRC message) after the activation of the secondary cell Or when the start of a random access procedure is instructed.
- RRC message the layer 3 message
- step S103 the mobile station apparatus 1 starts a random access procedure for the secondary cell in the transmission timing non-adjusted state, and transmits a physical random access channel to the base station apparatus 2.
- the base station apparatus 2 transmits a random access response to the mobile station apparatus 1 in step S104.
- the details of step S103 and step S104 may be the same as in FIG. 1 or FIG.
- the mobile station apparatus 1 performs secondary cell uplink transmission timing acquisition (step S105), and acquires uplink transmission timing adjustment information from the random access response in step S104.
- the uplink transmission timing is adjusted after a predetermined time (for example, after 4 subframes) after acquiring the transmission timing adjustment information.
- the mobile station device 1 determines that the PHR trigger condition is satisfied, and determines the PHR notified from the physical layer.
- a power headroom report is made by setting the MAC control information (step S106).
- FIG. 9 is a flowchart regarding power headroom reporting accompanying activation of the secondary cell of the mobile station apparatus 1 according to the present embodiment. This flowchart is started when at least one secondary cell in the transmission timing non-adjusted state is set for the mobile station apparatus 1 and an activation command for the secondary cell is received.
- the mobile station apparatus 1 monitors whether or not a random access procedure is triggered for the secondary cell (step S201).
- the timing when the mobile station device 1 starts the random access procedure in the secondary cell is, for example, (1) the same as the timing when the secondary cell is activated, (2) the random access is started by the MAC control element after the secondary cell is activated (3)
- the start of random access is instructed on the physical downlink control channel PDCCH after activation of the secondary cell, (4) Random in layer 3 message (RRC message) after activation of the secondary cell
- RRC message Random in layer 3 message
- the mobile station apparatus 1 proceeds to step S202 when the secondary cell random access procedure is started, otherwise returns to step S201 and continuously monitors the trigger.
- the mobile station apparatus 1 starts a random access procedure in step S202. Then, the mobile station apparatus 1 monitors the timing at which the power headroom can be reported in parallel with the execution of the random access procedure, and determines whether or not the power headroom can be reported every subframe (step) S203). As described above, the mobile station apparatus 1 determines that the power headroom can be reported when the uplink state of the secondary cell activated by the random access procedure becomes the transmission timing adjustment state. In other words, the mobile station apparatus 1 determines that the power headroom can be reported after a predetermined time has elapsed after receiving the transmission timing adjustment information of the activated secondary cell.
- the mobile station apparatus 1 reports the power headroom by including the PHR of the primary cell notified from the physical layer and the PHR of the activated secondary cell in the transmission timing adjustment state in the MAC control information (step S204). .
- the random access procedure applied to FIGS. 7 to 9 may be either a contention based random access (contention based random access) procedure or a non-contention based random access (non-contention based random access) procedure. . That is, regardless of which random access procedure is started, transmission timing adjustment information of the newly activated secondary cell is notified from the base station apparatus 2 to the mobile station apparatus 1 by a random access response, and the mobile station apparatus 1 is the same in that the PHR is transmitted after adjusting the uplink transmission timing of the activated secondary cell based on the transmission timing adjustment information.
- the mobile station device 1 when the activated secondary cell has the same uplink transmission timing as that of the primary cell, the mobile station device 1 has the uplink transmission timing adjusted for the activated secondary cell (transmission timing adjustment state). If the uplink is not set in the activated secondary cell, the conventional PHR report trigger condition is applied.
- the PHR reporting format may be either type 1 or type 2, and any of them does not affect the spirit of the present invention.
- the base station apparatus 2 activates the secondary cell to cause the mobile station apparatus 1 to report the power headroom of the related cell after adjusting the uplink transmission timing of the secondary cell.
- the mobile station apparatus 1 starts a random access procedure, adjusts the uplink transmission timing of the secondary cell, and then sets the power headroom as a base. Transmit to the station apparatus 2.
- the mobile station apparatus 1 reports the PHR of the component carrier (that is, the deactivated secondary cell) that cannot be scheduled to the base station apparatus 2. It is possible to solve the problem of conventional EUTRA.
- the mobile station apparatus 1 reports the power headroom after starting the random access procedure and adjusting the transmission timing.
- the mobile station apparatus 1 can be reused without extending the L2 message used for power headroom reporting.
- the mobile station apparatus 1 since the mobile station apparatus 1 reports the power headroom of the cell (component carrier) activated after the transmission timing adjustment state is established by the random access procedure, it is possible to reduce useless signaling. It becomes.
- the base station apparatus 2 of the present embodiment knows that the power headroom reported by the mobile station apparatus 1 is a schedulable component carrier, the secondary cell modulation scheme and the Resource allocation can be performed efficiently. Thus, the base station apparatus 2 can perform appropriate scheduling based on the reported power headroom.
- a second embodiment of the present invention will be described below.
- a power headroom reporting method for reporting power headroom after a random access procedure is successful will be described.
- the configurations of mobile station apparatus 1 and base station apparatus 2 used in the present embodiment may be the same as those shown in FIGS.
- the network configuration of the communication system in which the mobile station device 1 and the base station device 2 are arranged can be the same as that shown in FIG.
- the timing at which the mobile station apparatus 1 that manages a plurality of transmission timings can report PHR will be described with reference to FIG.
- the horizontal axis of FIG. 10 shows the history of time.
- the mobile station device 1 is started from a state in which at least one inactivated secondary cell is set from the base station device 2. Such a state can typically be regarded as a state after a new secondary cell is added or a state after the handover is performed. Further, the secondary cell requires uplink transmission timing different from that of the primary cell.
- the mobile station apparatus 1 performs the random access procedure being executed if necessary after time T04 when a delay time n2 (for example, 4 subframes) has elapsed as a processing time for adjusting the uplink transmission timing of the secondary cell. Continue. And the mobile station apparatus 1 judges that the power headroom report of the said secondary cell is possible (PHR transmission is possible) after the time T05 when the random access procedure was successful.
- a delay time n2 for example, 4 subframes
- the mobile station apparatus 1 starts the procedure similar to the case where the trigger conditions of PHR are satisfy
- the mobile station apparatus 1 of the present embodiment is when (1) the PHR report prohibition timer (Prohibit PHR timer) is stopped as a PHR trigger condition instead of the conventional EUTRA PHR trigger condition. (2) PHR period timer (Periodic PHR timer) when the path loss value of the primary cell or the transmission timing adjustment state and the activated secondary cell has deteriorated by more than a predetermined value than when the previous PHR was reported Is used, (3) when the PHR setting is changed, and (4) when the secondary cell random access procedure is successful.
- the mobile station apparatus 1 transmits the PHR between the primary cell and the activated secondary cell in the transmission timing adjustment state to the base station apparatus 2 when any of the above-described PHR trigger conditions is satisfied.
- FIG. 11 and FIG. 12 are sequence charts showing the exchange of signaling related to the power headroom report accompanying the activation of the secondary cell between the mobile station apparatus 1 and the base station apparatus 2 according to the present embodiment.
- FIG. 11 shows an example when the contention based random access procedure is performed
- FIG. 12 shows an example when the non-contention based random access procedure is performed.
- the mobile station device 1 starts from a state in which at least one inactivated secondary cell is set from the base station device 2. Furthermore, the uplink transmission timing different from the primary cell is set for the secondary cell.
- step S301 an activation command for the secondary cell in the transmission timing non-adjusted state is notified from the base station apparatus 2.
- the activation command may be notified by a MAC control element as usual, or may be notified by an RRC message or a physical downlink control channel.
- the mobile station apparatus 1 determines a random access trigger as to whether or not to start a random access procedure for the activated secondary cell (step S302).
- the timing at which the mobile station apparatus 1 starts the random access procedure in the secondary cell may be the same as that described in step S102 in FIG. 8, and therefore detailed description thereof will not be repeated.
- the base station apparatus 2 does not notify the mobile station apparatus 1 of the individual preamble, and the mobile station apparatus 1 starts the Contention based Random Access procedure as a random access procedure.
- step S303 the mobile station apparatus 1 starts the contention based random access procedure for the secondary cell in the transmission timing non-adjusted state, and transmits the physical random access channel to the base station apparatus 2.
- the base station apparatus 2 transmits a random access response to the mobile station apparatus 1 in step S304.
- the details of step S303 and step S304 may be the same as in FIG.
- the mobile station apparatus 1 performs secondary cell uplink transmission timing acquisition (step S305), and acquires uplink transmission timing adjustment information from the random access response in step S304.
- the uplink transmission timing is adjusted after a predetermined time (for example, after 4 subframes) after acquiring the transmission timing adjustment information.
- the mobile station apparatus 1 regards the uplink state of the newly activated secondary cell as a transmission timing adjustment state, and transmits an upper layer message to the base station apparatus 2 (step S306).
- the base station device 2 transmits a collision confirmation message (contention resolution) to the mobile station device 1 (step S307).
- the details of step S306 and step S307 may be the same as in FIG.
- the mobile station apparatus 1 analyzes the contention resolution received in step S307 and confirms whether it is a response to the upper layer message transmitted in step S306. When confirming that the response is to the upper layer message, the mobile station apparatus 1 determines that the contention based random access procedure has been successful (step S308). When the contention based random access procedure is successful, the mobile station apparatus 1 determines that the PHR trigger condition is satisfied, sets the PHR notified from the physical layer in the MAC control information, and performs power headroom reporting (steps). S309).
- the mobile station apparatus 1 starts from a state in which at least one inactivated secondary cell is set from the base station apparatus 2. Further, the secondary cell requires uplink transmission timing different from that of the primary cell.
- step S401 an activation command for the secondary cell in the transmission timing non-adjusted state is notified from the base station apparatus 2.
- the activation command may be notified by a MAC control element as usual, or may be notified by an RRC message or a physical downlink control channel.
- the mobile station apparatus 1 determines a random access trigger as to whether or not to start a random access procedure for the activated secondary cell (step S402).
- the timing at which the mobile station apparatus 1 starts the random access procedure in the secondary cell may be the same as that described in step S102 in FIG. 8, and therefore detailed description thereof will not be repeated.
- the base station apparatus 2 notifies the mobile station apparatus 1 of an individual preamble, and the mobile station apparatus 1 starts a non-contention based random access procedure as a random access procedure.
- the method in which the base station apparatus 2 notifies the mobile station apparatus 1 of the dedicated preamble is one or more of a method in which the dedicated preamble is included in the PDCCH, a method in which the MAC control element notifies, and a method in which the RRC message notifies. Can be used.
- step S403 the mobile station apparatus 1 starts a non-contention based random access procedure for the secondary cell in the transmission timing non-adjusted state, and transmits a physical random access channel to the base station apparatus 2.
- the base station apparatus 2 transmits a random access response to the mobile station apparatus 1 in step S404.
- the details of step S403 and step S404 may be the same as in FIG.
- the mobile station apparatus 1 performs secondary cell uplink transmission timing acquisition (step S405), and acquires uplink transmission timing adjustment information from the random access response of step S404.
- the uplink transmission timing is adjusted after a predetermined time (for example, after 4 subframes) after acquiring the transmission timing adjustment information.
- the mobile station apparatus 1 regards the uplink state of the newly activated secondary cell as the transmission timing adjustment state.
- the mobile station apparatus 1 determines that the Non-contention based Random Access procedure has been successful by receiving the random access response in Step S404 in parallel with the processing in Step S405 (Step S406).
- the mobile station apparatus 1 determines that the PHR trigger condition is satisfied, sets the PHR notified from the physical layer in the MAC control information, and performs power headroom reporting (Step S407).
- step S203 of FIG. 9 the mobile station apparatus 1 determines that the power headroom can be reported, and when the random access procedure executed in the activated secondary cell succeeds, Determine that the room is reportable.
- the mobile station apparatus 1 receives a contention resolution addressed to itself if it is a Contention based Random Access procedure, it receives a random access response if it is a Non-contention based Random Access procedure.
- it is determined that the power headroom of the secondary cell that has performed the random access can be reported.
- the mobile station apparatus 1 is the case where the activated secondary cell has the same uplink transmission timing as the primary cell, or the activated secondary cell has the uplink transmission timing adjusted (transmission timing adjustment state). In some cases, or when an uplink is not set in the activated secondary cell, a conventional trigger condition for PHR reporting is applied.
- the PHR reporting format may be either type 1 or type 2, and any of them does not affect the spirit of the present invention.
- the base station apparatus 2 activates the secondary cell to cause the mobile station apparatus 1 to report the power headroom of the related cell after the random access procedure in the secondary cell is successful.
- the secondary cell whose uplink transmission timing is not adjusted is activated, the mobile station apparatus 1 starts a random access procedure, and after the random access procedure is successful, the mobile station apparatus 1 transfers the power headroom to the base station apparatus 2. Send.
- the mobile station apparatus 1 reports the PHR of the component carrier (that is, the deactivated secondary cell) that cannot be scheduled to the base station apparatus 2. It is possible to solve the problem of conventional EUTRA.
- the power headroom is reported after confirming that the random access procedure is successful, if the random access procedure fails after adjusting the transmission timing (particularly, in the Contention based Random Access procedure). It is possible to report the power headroom efficiently in consideration of (which may occur). In other words, since the mobile station apparatus 1 reports the power headroom after the secondary cell can be scheduled by the base station apparatus 2, it is possible to reduce useless signaling.
- the mobile station apparatus 1 of the present embodiment reports the power headroom after the random access procedure is successful.
- the mobile station apparatus 1 can be reused without extending the L2 message used for power headroom reporting.
- the mobile station apparatus 1 reports the power headroom of the cell (component carrier) activated after the random access procedure is successful, it is possible to reduce useless signaling.
- the base station apparatus 2 of the present embodiment knows that the power headroom reported by the mobile station apparatus 1 is a schedulable component carrier, the secondary cell modulation scheme and the Resource allocation can be performed efficiently. Thus, the base station apparatus 2 can perform appropriate scheduling based on the reported power headroom.
- this uplink transmission scheme can be applied to both communication systems of the FDD (frequency division duplex) scheme and the TDD (time division duplex) scheme.
- FDD frequency division duplex
- TDD time division duplex
- an example using a path loss as a measurement value of a downlink component carrier has been described.
- other measurement values SIR, SINR, RSRP, RSRQ, RSSI, BLER
- the mobile station device 1 and the base station device 2 of the embodiment have been described using functional block diagrams.
- the functions of each part of the mobile station device 1 and the base station device 2 or one of these functions Is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to control the mobile station apparatus 1 and the base station apparatus 2.
- the “computer system” includes an OS and hardware such as peripheral devices.
- the “computer-readable recording medium” refers to a semiconductor medium (eg, RAM, nonvolatile memory card, etc.), an optical recording medium (eg, DVD, MO, MD, CD, BD, etc.), a magnetic recording medium (eg, , A magnetic tape, a flexible disk, etc.) and a storage device such as a disk unit built in a computer system. Furthermore, the “computer-readable recording medium” means that a program is dynamically held for a short time, like a communication line when a program is transmitted via a network such as the Internet or a communication line such as a telephone line.
- a network such as the Internet
- a communication line such as a telephone line.
- the program may be for realizing a part of the above-described functions, and may be capable of realizing the above-described functions in combination with a program already recorded in the computer system. .
- each functional block or various features of the mobile station device 1 and the base station device 2 used in the above embodiments may be configured in a circuit including an LSI that is typically an IC (integrated circuit). .
- the integration density of the LSI may be realized at any density.
- Each functional block and various features may be individually chipped, or a part or all of them may be integrated into a chip.
- the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
- an integrated circuit based on the technology can also be used.
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Abstract
Provided is a communication system that reports, to a base station device, the power headroom indicating the transmission power reserve of a plurality of serving cells to which a mobile station device is connected. The plurality of serving cells include: a first serving cell having the same uplink transmission timing as a primary cell; and a second serving cell that is activated or deactivated and that has an uplink transmission timing different from the first serving cell. The base station device activates the second serving cell that has been set to the mobile station device. When the uplink transmission timing of the second serving cell, which has been activated by the base station device, enters an adjustment state on the basis of transmission-timing adjustment information related to the second serving cell and received from the base station device, the mobile station device determines that the condition for triggering the reporting of the power headroom has been satisfied.
Description
本発明は、複数の上りリンク送信タイミングの調整が必要な場合において、移動局装置が効率的にパワーヘッドルームの報告を行なう通信システム、当該通信システムに向けられた基地局装置および移動局装置、パワーヘッドルーム報告方法、ならびに集積回路に関する。
The present invention provides a communication system in which a mobile station apparatus efficiently reports power headroom when a plurality of uplink transmission timing adjustments are required, a base station apparatus and a mobile station apparatus directed to the communication system, The present invention relates to a power headroom reporting method and an integrated circuit.
標準化プロジェクトである3GPP(3rd Generation Partnership Project)において、Evolved Universal Terrestrial Radio Access(以下、「EUTRA」と称する。)の標準化が行なわれた。EUTRAでは、OFDM(Orthogonal Frequency-Division Multiplexing)通信方式の採用や、リソースブロックと呼ばれる所定の周波数/時間単位の柔軟なスケジューリングの採用によって、高速な通信を実現した。
The standardized project, 3GPP (3rd Generation Partnership Project), standardized Evolved Universal Terrestrial Radio Access (hereinafter referred to as “EUTRA”). In EUTRA, high-speed communication is realized by adopting an OFDM (Orthogonal Frequency-Division Multiplexing) communication method and adopting flexible scheduling called a resource block in a predetermined frequency / time unit.
また、3GPPでは、より高速なデータ伝送を実現し、EUTRAの上位互換性を持つAdvanced EUTRAについての議論を行っている。Advanced EUTRAにおける技術として、キャリア・アグリゲーション(Carrier Aggregation)が提案されている。キャリア・アグリゲーションとは、複数の異なる周波数(以下、「コンポーネントキャリア(Component Carrier)」とも称する。)を集約して使用することで、伝送レートを向上させる技術である。また、キャリア・アグリゲーションを用いて、基地局装置と通信中の移動局装置が、周波数毎またはコンポーネントキャリア毎に複数の上りリンク送信タイミング(Timing Advance)を持つことが提案されている(非特許文献1)。
Also, 3GPP is discussing Advanced EUTRA that realizes higher-speed data transmission and has upward compatibility with EUTRA. Carrier aggregation has been proposed as a technology in Advanced EUTRA. Carrier aggregation is a technique for improving a transmission rate by using a plurality of different frequencies (hereinafter, also referred to as “component carriers”) in an aggregate manner. Further, it has been proposed that a mobile station apparatus communicating with a base station apparatus has a plurality of uplink transmission timings (Timing Advance) for each frequency or component carrier using carrier aggregation (Non-patent Document). 1).
EUTRAでは、移動局装置の上りリンク送信タイミングを調整するために、ランダムアクセス手順が用意されている。ランダムアクセス手順は、移動局装置が自律的にランダムアクセス手順の必要性を判断してアクセスを開始する方法の他に、基地局装置が特定の移動局装置に、ランダムアクセス手順を開始させるために、物理下りリンク制御チャネルにランダムアクセス手順の開始を示す情報を設定して送信するという方法がある。
In EUTRA, a random access procedure is prepared to adjust the uplink transmission timing of the mobile station apparatus. In addition to the method in which the mobile station apparatus autonomously determines the necessity of the random access procedure and starts access, the base station apparatus causes the specific mobile station apparatus to start the random access procedure. There is a method in which information indicating the start of a random access procedure is set in the physical downlink control channel and transmitted.
また、3GPPにおいては、基地局装置に対して移動局装置の送信電力の余力を通知するパワーヘッドルーム(Power Head Room;以下、「PHR」とも称する。)が用いられる。PHRは、あるコンポーネントキャリアにおける移動局装置の最大送信電力から、物理上りリンク共用チャネルに必要な送信電力、または、物理上りリンク共用チャネルと物理上りリンク制御チャネルとに必要な送信電力、を引いた残りの電力(送信電力の余力)を表す。PHRが大きいほど、報告元の移動局装置の上りリンクの送信に余裕があることを示す。基地局装置は、報告されたPHRを参考にして、報告元の移動局装置に対して、伝送レートの高い変調方式の指定や、より多くのリソースを割り当てるといった、適切なスケジューリングを実行することができる。非特許文献2には、従来におけるPHRの計算方法が記載されている。
In 3GPP, a power headroom (hereinafter also referred to as “PHR”) for notifying the base station device of the remaining power of the transmission power of the mobile station device is used. The PHR is obtained by subtracting the transmission power required for the physical uplink shared channel or the transmission power required for the physical uplink shared channel and the physical uplink control channel from the maximum transmission power of the mobile station apparatus in a certain component carrier. It represents the remaining power (remaining power of transmission power). A larger PHR indicates that there is a margin in uplink transmission of the mobile station apparatus that is the report source. The base station apparatus may execute appropriate scheduling such as designating a modulation scheme with a high transmission rate and allocating more resources to the reporting mobile station apparatus with reference to the reported PHR. it can. Non-Patent Document 2 describes a conventional PHR calculation method.
また、基地局装置は、一つの下りリンクのコンポーネントキャリアと一つの上りリンクのコンポーネントキャリアとを組み合わせて、一つのセルを構成する。なお、基地局装置は、一つの下りリンクコンポーネントキャリアのみでも一つのセルを構成できる。
In addition, the base station apparatus configures one cell by combining one downlink component carrier and one uplink component carrier. Note that the base station apparatus can configure one cell with only one downlink component carrier.
しかしながら、新規に追加されたコンポーネントキャリアのセルは、データの送受信および物理下りリンク制御チャネルの監視を行なわない、不活性化の状態(詳細については後述する。)である。さらに、非特許文献1で提案されているように複数の上りリンク送信タイミングを持ち、それぞれの上りリンク送信タイミングを上りリンクコンポーネントキャリア毎(あるいは、上りリンクコンポーネントキャリアグループ、および/または、上りリンク周波数毎)に調整するような場合、コンポーネントキャリアが活性化されたタイミングでは、上りリンクの送信タイミングが調整されていないことにより送信ができないコンポーネントキャリアが存在する。これは、送信を行なうことができないコンポーネントキャリアのPHRを移動局装置から報告されても、基地局装置は、当該コンポーネントキャリアを用いたスケジューリングができないことを意味する。
However, the newly added component carrier cell is in an inactive state (details will be described later) in which data transmission / reception and physical downlink control channel monitoring are not performed. Further, as proposed in Non-Patent Document 1, the transmission timing has a plurality of uplink transmission timings, and each uplink transmission timing is set for each uplink component carrier (or uplink component carrier group and / or uplink frequency). When the component carrier is activated, there is a component carrier that cannot be transmitted because the uplink transmission timing is not adjusted. This means that even if the mobile station apparatus reports PHR of a component carrier that cannot be transmitted, the base station apparatus cannot perform scheduling using the component carrier.
そのため、複数の上りリンク送信タイミングを持つコンポーネントキャリアが設定された場合において、基地局装置がスケジューリングできないコンポーネントキャリアのPHRを、移動局装置が報告してしまうという問題に関し、その具体的な解決方法は、非特許文献1および非特許文献2には何ら示されていない。
Therefore, when a component carrier having a plurality of uplink transmission timings is set, a specific solution for the problem that the mobile station device reports the PHR of the component carrier that cannot be scheduled by the base station device is Non-Patent Document 1 and Non-Patent Document 2 do not show anything.
上記の課題を鑑みて、本発明の目的は、複数の上りリンク送信タイミングの調整が必要な場合において、移動局装置による効率的なパワーヘッドルームの報告を可能とする通信システム、当該に向けられた基地局装置および移動局装置、パワーヘッドルーム報告方法、ならびに集積回路を提供することである。
In view of the above problems, an object of the present invention is directed to a communication system that enables efficient power headroom reporting by a mobile station apparatus when adjustment of a plurality of uplink transmission timings is necessary. A base station apparatus and a mobile station apparatus, a power headroom reporting method, and an integrated circuit.
本発明のある実施形態によれば、移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムが提供される。複数の在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含む。基地局装置は、移動局装置に設定した第2の在圏セルを活性化する。移動局装置は、基地局装置が活性化した第2の在圏セルの上りリンクの送信タイミングが、基地局装置から受信した第2の在圏セルに関する送信タイミング調整情報に基づき調整状態となったときに、パワーヘッドルームの報告のトリガ条件が満たされたと判断する。
According to an embodiment of the present invention, there is provided a communication system that reports power headroom indicating the remaining power of transmission power of a plurality of serving cells to which a mobile station apparatus is connected to a base station apparatus. The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated. Second serving cell. The base station device activates the second serving cell set in the mobile station device. In the mobile station device, the uplink transmission timing of the second serving cell activated by the base station device has been adjusted based on the transmission timing adjustment information related to the second serving cell received from the base station device. Sometimes it is determined that the power headroom reporting trigger condition has been met.
本実施形態に係る通信システムにおいて、基地局装置は、Contention based Random Access手順を用いて、送信タイミング調整情報を通知する。
In the communication system according to the present embodiment, the base station device notifies the transmission timing adjustment information using the Contention based Random Access procedure.
本実施形態に係る通信システムにおいて、基地局装置は、Non-contention based Random Access手順を用いて、送信タイミング調整情報を通知する。
In the communication system according to the present embodiment, the base station apparatus notifies transmission timing adjustment information using a non-contention based Random Access procedure.
本実施形態に係る通信システムにおいて、移動局装置は、パワーヘッドルームの報告のトリガ条件が満たされたと判断したときに、複数の在圏セルの活性化の状態と上りリンクの送信タイミングの調整状態とに基づいて、パワーヘッドルームを報告する在圏セルを決定する。
In the communication system according to the present embodiment, when the mobile station apparatus determines that the trigger condition for power headroom reporting is satisfied, the mobile station apparatus activates a plurality of serving cells and adjusts the uplink transmission timing. Based on the above, the serving cell reporting the power headroom is determined.
本実施形態に係る通信システムにおいて、移動局装置は、活性化されており、かつ上りリンクの送信タイミングが調整状態である第2の在圏セルのパワーヘッドルームを、基地局装置へ報告する。
In the communication system according to the present embodiment, the mobile station apparatus reports to the base station apparatus the power headroom of the second serving cell in which the mobile station apparatus is activated and the uplink transmission timing is adjusted.
本発明の別の実施形態によれば、移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムが提供される。複数の在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含む。基地局装置は、移動局装置に設定した第2の在圏セルを活性化する。移動局装置は、基地局装置が活性化した第2の在圏セルでランダムアクセス手順を実行し、ランダムアクセス手順の成功または失敗に基づいて、パワーヘッドルームの報告のトリガ条件が満たされたか否かを判断する。
According to another embodiment of the present invention, there is provided a communication system for reporting to a base station device a power headroom indicating the remaining power of transmission power of a plurality of serving cells connected to the mobile station device. The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated. Second serving cell. The base station device activates the second serving cell set in the mobile station device. The mobile station apparatus executes the random access procedure in the second serving cell activated by the base station apparatus, and whether or not the trigger condition for power headroom reporting is satisfied based on the success or failure of the random access procedure Determine whether.
本実施形態に係る通信システムにおいて、ランダムアクセス手順は、Contention based Random Access手順であり、移動局装置は、コンテンションレゾリューションを正しく受信したか否かに基づいて、パワーヘッドルームのトリガ条件が満たされたか否かを判断する。
In the communication system according to the present embodiment, the random access procedure is the Contention based Random Access procedure, and the mobile station apparatus determines whether the trigger condition of the power headroom is based on whether or not the contention resolution is correctly received. Determine if it is satisfied.
本実施形態に係る通信システムにおいて、ランダムアクセス手順は、Non-contention based Random Access手順であり、移動局装置は、ランダムアクセスレスポンスを正しく受信したか否かに基づいて、パワーヘッドルームのトリガ条件が満たされたか否かを判断する。
In the communication system according to the present embodiment, the random access procedure is a Non-contention based Random Access procedure, and the mobile station apparatus determines whether the power headroom trigger condition is based on whether or not the random access response is correctly received. Determine if it is satisfied.
本実施形態に係る通信システムにおいて、移動局装置は、パワーヘッドルームの報告のトリガ条件が満たされたと判断したときに、複数の在圏セルの活性化の状態と上りリンクの送信タイミングの調整状態とに基づいて、パワーヘッドルームを報告する在圏セルを決定する。
In the communication system according to the present embodiment, when the mobile station apparatus determines that the trigger condition for power headroom reporting is satisfied, the mobile station apparatus activates a plurality of serving cells and adjusts the uplink transmission timing. Based on the above, the serving cell reporting the power headroom is determined.
本実施形態に係る通信システムにおいて、移動局装置は、活性化されており、かつ上りリンクの送信タイミングが調整状態である第2の在圏セルのパワーヘッドルームを、基地局装置へ報告する。
In the communication system according to the present embodiment, the mobile station apparatus reports to the base station apparatus the power headroom of the second serving cell in which the mobile station apparatus is activated and the uplink transmission timing is adjusted.
本発明のさらに別の実施形態によれば、移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおける移動局装置が提供される。複数の在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含む。移動局装置は、基地局装置が活性化した第2の在圏セルの上りリンクの送信タイミングが、基地局装置から受信した第2の在圏セルに関する送信タイミング調整情報に基づき調整状態となったときに、パワーヘッドルームの報告のトリガ条件が満たされたと判断する。
According to still another embodiment of the present invention, there is provided a mobile station apparatus in a communication system that reports to a base station apparatus a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station apparatus is connected. Is done. The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated. Second serving cell. In the mobile station device, the uplink transmission timing of the second serving cell activated by the base station device has been adjusted based on the transmission timing adjustment information related to the second serving cell received from the base station device. Sometimes it is determined that the power headroom reporting trigger condition has been met.
本実施形態に係る移動局装置は、Contention based Random Access手順を用いて、送信タイミング調整情報を基地局装置から受信する。
The mobile station apparatus according to the present embodiment receives transmission timing adjustment information from the base station apparatus using a Contention based Random Access procedure.
本実施形態に係る移動局装置は、Non-contention based Random Access手順を用いて、送信タイミング調整情報を基地局装置から受信する。
The mobile station apparatus according to the present embodiment receives transmission timing adjustment information from the base station apparatus using a non-contention based Random Access procedure.
本実施形態に係る移動局装置は、パワーヘッドルームの報告のトリガ条件が満たされたと判断したときに、複数の在圏セルの活性化の状態と上りリンクの送信タイミングの調整状態とに基づいて、パワーヘッドルームを報告する在圏セルを決定する。
When it is determined that the power headroom report trigger condition is satisfied, the mobile station apparatus according to the present embodiment is based on the activation state of a plurality of serving cells and the uplink transmission timing adjustment state. Determine the serving cell reporting power headroom.
本実施形態に係る移動局装置は、活性化されており、かつ上りリンクの送信タイミングが調整状態である第2の在圏セルのパワーヘッドルームを、基地局装置へ報告する。
The mobile station apparatus according to the present embodiment reports to the base station apparatus the power headroom of the second serving cell that is activated and whose uplink transmission timing is in an adjusted state.
本発明のさらに別の実施形態によれば、移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおける移動局装置が提供される。複数の在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含む。移動局装置は、基地局装置が活性化した第2の在圏セルでランダムアクセス手順を実行し、ランダムアクセス手順の成功または失敗に基づいて、パワーヘッドルームの報告のトリガ条件が満たされたか否かを判断する。
According to still another embodiment of the present invention, there is provided a mobile station apparatus in a communication system that reports to a base station apparatus a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station apparatus is connected. Is done. The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated. Second serving cell. The mobile station apparatus executes the random access procedure in the second serving cell activated by the base station apparatus, and whether or not the trigger condition for power headroom reporting is satisfied based on the success or failure of the random access procedure Determine whether.
本実施形態に係る移動局装置は、ランダムアクセス手順がContention based Random Access手順である場合、コンテンションレゾリューションを正しく受信したか否かに基づいて、パワーヘッドルームのトリガ条件が満たされたか否かを判断する。
When the random access procedure is the Contention based Random Access procedure, the mobile station apparatus according to this embodiment determines whether the power headroom trigger condition is satisfied based on whether the contention resolution is correctly received. Determine whether.
本実施形態に係る移動局装置は、ランダムアクセス手順がNon-contention based Random Access手順である場合、ランダムアクセスレスポンスを正しく受信したか否かに基づいて、パワーヘッドルームのトリガ条件が満たされたか否かを判断する。
When the random access procedure is a non-contention based random access procedure, the mobile station apparatus according to the present embodiment determines whether the power headroom trigger condition is satisfied based on whether the random access response is correctly received. Determine whether.
本実施形態に係る移動局装置は、パワーヘッドルームの報告のトリガ条件が満たされたと判断したときに、複数の在圏セルの活性化の状態と上りリンクの送信タイミングの調整状態とに基づいて、パワーヘッドルームを報告する在圏セルを決定する。
When it is determined that the power headroom report trigger condition is satisfied, the mobile station apparatus according to the present embodiment is based on the activation state of a plurality of serving cells and the uplink transmission timing adjustment state. Determine the serving cell reporting power headroom.
本実施形態に係る移動局装置は、活性化されており、かつ上りリンクの送信タイミングが調整状態である第2の在圏セルのパワーヘッドルームを、基地局装置へ報告する。
The mobile station apparatus according to the present embodiment reports to the base station apparatus the power headroom of the second serving cell that is activated and whose uplink transmission timing is in an adjusted state.
本発明のさらに別の実施形態によれば、移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおける基地局装置が提供される。複数の在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含む。基地局装置は、移動局装置に設定した第2の在圏セルを活性化し、活性化した第2の在圏セルに関する送信タイミング調整情報を移動局装置へ送信し、第2の在圏セルの上りリンクの送信タイミングを調整状態とすることによって、移動局装置にパワーヘッドルームの報告のトリガ条件が満たされたと判断させる。
According to still another embodiment of the present invention, there is provided a base station apparatus in a communication system that reports to a base station apparatus a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station apparatus is connected. Is done. The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated. Second serving cell. The base station device activates the second serving cell set in the mobile station device, transmits transmission timing adjustment information related to the activated second serving cell to the mobile station device, and sets the second serving cell of the second serving cell. By setting the uplink transmission timing to the adjusted state, the mobile station apparatus is caused to determine that the trigger condition for reporting the power headroom is satisfied.
本発明のさらに別の実施形態によれば、移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおける基地局装置が提供される。複数の在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含む。基地局装置は、移動局装置に設定した第2の在圏セルを活性化し、活性化した第2の在圏セルのランダムアクセス手順を移動局装置に実行させることによって、移動局装置に、ランダムアクセス手順の成功または失敗に基づいて、パワーヘッドルームの報告のトリガ条件が満たされたか否かを判断させる。
According to still another embodiment of the present invention, there is provided a base station apparatus in a communication system that reports to a base station apparatus a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station apparatus is connected. Is done. The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated. Second serving cell. The base station apparatus activates the second serving cell set in the mobile station apparatus and causes the mobile station apparatus to execute a random access procedure for the activated second serving cell, thereby causing the mobile station apparatus to perform random access. Based on the success or failure of the access procedure, it is determined whether the trigger condition for power headroom reporting has been met.
本発明のさらに別の実施形態によれば、移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおけるパワーヘッドルーム報告方法が提供される。複数の在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含む。基地局装置は、移動局装置に設定した第2の在圏セルを活性化する。移動局装置は、基地局装置が活性化した第2の在圏セルの上りリンクの送信タイミングが、基地局装置から受信した第2の在圏セルに関する送信タイミング調整情報に基づき調整状態となったときに、パワーヘッドルームの報告のトリガ条件が満たされたと判断する。
According to still another embodiment of the present invention, a power headroom reporting method in a communication system for reporting to a base station device a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station device is connected. Is provided. The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated. Second serving cell. The base station device activates the second serving cell set in the mobile station device. In the mobile station device, the uplink transmission timing of the second serving cell activated by the base station device has been adjusted based on the transmission timing adjustment information related to the second serving cell received from the base station device. Sometimes it is determined that the power headroom reporting trigger condition has been met.
本発明のさらに別の実施形態によれば、移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおけるパワーヘッドルーム報告方法が提供される。複数の在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含む。基地局装置は、移動局装置に設定した第2の在圏セルを活性化する。移動局装置は、基地局装置が活性化した第2の在圏セルでランダムアクセス手順を実行し、ランダムアクセス手順の成功または失敗に基づいて、パワーヘッドルームの報告のトリガ条件が満たされたか否かを判断する。
According to still another embodiment of the present invention, a power headroom reporting method in a communication system for reporting to a base station device a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station device is connected. Is provided. The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated. Second serving cell. The base station device activates the second serving cell set in the mobile station device. The mobile station apparatus executes the random access procedure in the second serving cell activated by the base station apparatus, and whether or not the trigger condition for power headroom reporting is satisfied based on the success or failure of the random access procedure Determine whether.
本発明のさらに別の実施形態によれば、移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおける移動局装置に搭載される集積回路が提供される。複数の在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含む。集積回路は、基地局装置が活性化した第2の在圏セルの上りリンクの送信タイミングが、基地局装置から受信した第2の在圏セルに関する送信タイミング調整情報に基づき調整状態となったときに、パワーヘッドルームの報告のトリガ条件が満たされたと判断する。
According to still another embodiment of the present invention, a mobile station apparatus in a communication system that reports to a base station apparatus a power headroom indicating the remaining transmission power of a plurality of serving cells connected to the mobile station apparatus. An integrated circuit is provided. The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated. Second serving cell. In the integrated circuit, when the uplink transmission timing of the second serving cell activated by the base station apparatus is in an adjustment state based on the transmission timing adjustment information regarding the second serving cell received from the base station apparatus And the power headroom reporting trigger condition is satisfied.
本発明のさらに別の実施形態によれば、移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおける移動局装置に搭載される集積回路が提供される。複数の在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含む。集積回路は、基地局装置が活性化した第2の在圏セルでランダムアクセス手順を実行し、ランダムアクセス手順の成功または失敗に基づいて、パワーヘッドルームの報告のトリガ条件が満たされたか否かを判断する。
According to still another embodiment of the present invention, a mobile station apparatus in a communication system that reports to a base station apparatus a power headroom indicating the remaining transmission power of a plurality of serving cells connected to the mobile station apparatus. An integrated circuit is provided. The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell and an uplink transmission timing different from the first serving cell, and are activated or deactivated. Second serving cell. The integrated circuit performs a random access procedure in the second serving cell activated by the base station apparatus, and whether or not a trigger condition for power headroom reporting is satisfied based on the success or failure of the random access procedure Judging.
本明細書では、移動局装置と基地局装置が複数の周波数を同時に用いて接続される場合における通信システム、基地局装置、移動局装置、パワーヘッドルーム報告方法および集積回路の改良という点において本発明を開示するが、本発明が適用可能な通信方式は、EUTRAまたはAdvanced EUTRAのようにEUTRAと上位互換性のある通信方式に限定されるものではない。例えば、本発明はUMTS(Universal Mobile Telecommunications System)にも適用することができる。
In the present specification, the present invention is intended to improve a communication system, a base station apparatus, a mobile station apparatus, a power headroom reporting method, and an integrated circuit when a mobile station apparatus and a base station apparatus are connected using a plurality of frequencies simultaneously. Although the invention is disclosed, a communication system to which the present invention is applicable is not limited to a communication system that is upward compatible with EUTRA, such as EUTRA or Advanced EUTRA. For example, the present invention can also be applied to UMTS (Universal Mobile Telecommunications System).
以上説明したように、本発明によれば、複数の周波数を用いて基地局装置と接続可能な移動局装置が、複数の上りリンク送信タイミングを調整することが必要な場合において、効率的なパワーヘッドルームの報告を可能とする通信システム、当該通信システムに向けられた基地局装置および移動局装置、パワーヘッドルーム報告方法、ならびに集積回路を提供することができる。
As described above, according to the present invention, when a mobile station apparatus that can be connected to a base station apparatus using a plurality of frequencies needs to adjust a plurality of uplink transmission timings, an efficient power It is possible to provide a communication system capable of reporting headroom, a base station apparatus and mobile station apparatus directed to the communication system, a power headroom reporting method, and an integrated circuit.
本発明の実施形態に関連する、キャリア・アグリゲーション、物理チャネル、ランダムアクセス手順、および、パワーヘッドルーム報告について簡単に説明する。
A brief description of carrier aggregation, physical channels, random access procedures, and power headroom reporting associated with embodiments of the present invention is provided.
[キャリア・アグリゲーション]
キャリア・アグリゲーションとは、複数の異なる周波数(コンポーネントキャリア、または周波数帯域)を集約(アグリゲーション)して一つの周波数(周波数帯域)のように扱う技術である。例えば、キャリア・アグリゲーションによって、周波数帯域幅が20MHzのコンポーネントキャリアを5つ集約した場合、移動局装置は、これらを一つの100MHzの周波数帯域幅とみなしてアクセスすることが可能となる。なお、集約するコンポーネントキャリアは、連続した周波数であってもよいし、全てまたは一部が不連続となる周波数であってもよい。例えば、使用可能な周波数が800MHz帯、2.4GHz帯、3.4GHz帯である場合、あるコンポーネントキャリアが800MHz帯、別のコンポーネントキャリアが2GHz帯、さらに別のコンポーネントキャリアが3.4GHz帯で送信されていてもよい。 [Carrier aggregation]
Carrier aggregation is a technology that aggregates (aggregates) a plurality of different frequencies (component carriers or frequency bands) and treats them as one frequency (frequency band). For example, when five component carriers having a frequency bandwidth of 20 MHz are aggregated by carrier aggregation, the mobile station apparatus can access them by regarding these as one frequency bandwidth of 100 MHz. The component carriers to be aggregated may be continuous frequencies, or may be frequencies at which all or part of them are discontinuous. For example, when the usable frequency is in the 800 MHz band, 2.4 GHz band, and 3.4 GHz band, one component carrier is transmitted in the 800 MHz band, another component carrier is transmitted in the 2 GHz band, and another component carrier is transmitted in the 3.4 GHz band. May be.
キャリア・アグリゲーションとは、複数の異なる周波数(コンポーネントキャリア、または周波数帯域)を集約(アグリゲーション)して一つの周波数(周波数帯域)のように扱う技術である。例えば、キャリア・アグリゲーションによって、周波数帯域幅が20MHzのコンポーネントキャリアを5つ集約した場合、移動局装置は、これらを一つの100MHzの周波数帯域幅とみなしてアクセスすることが可能となる。なお、集約するコンポーネントキャリアは、連続した周波数であってもよいし、全てまたは一部が不連続となる周波数であってもよい。例えば、使用可能な周波数が800MHz帯、2.4GHz帯、3.4GHz帯である場合、あるコンポーネントキャリアが800MHz帯、別のコンポーネントキャリアが2GHz帯、さらに別のコンポーネントキャリアが3.4GHz帯で送信されていてもよい。 [Carrier aggregation]
Carrier aggregation is a technology that aggregates (aggregates) a plurality of different frequencies (component carriers or frequency bands) and treats them as one frequency (frequency band). For example, when five component carriers having a frequency bandwidth of 20 MHz are aggregated by carrier aggregation, the mobile station apparatus can access them by regarding these as one frequency bandwidth of 100 MHz. The component carriers to be aggregated may be continuous frequencies, or may be frequencies at which all or part of them are discontinuous. For example, when the usable frequency is in the 800 MHz band, 2.4 GHz band, and 3.4 GHz band, one component carrier is transmitted in the 800 MHz band, another component carrier is transmitted in the 2 GHz band, and another component carrier is transmitted in the 3.4 GHz band. May be.
また、同一周波数帯、例えば2.4GHz帯内の連続または不連続の複数のコンポーネントキャリアを集約することも可能である。各コンポーネントキャリアの周波数帯域幅は、20MHzより狭い周波数帯域幅であってもよく、各々周波数帯域幅が異なっていてもよい。基地局装置は、滞留しているデータバッファ量、移動局装置の受信品質、セル内の負荷やQoSなどの、種々の要因に基づいて、移動局装置に割り当てる上りリンクまたは下りリンクのコンポーネントキャリアの数を増減することができる。なお、基地局装置が割り当てる上りリンクコンポーネントキャリアの数は、下りリンクコンポーネントキャリアの数と同じか少ないことが好ましい。
Also, it is possible to aggregate a plurality of continuous or discontinuous component carriers in the same frequency band, for example, the 2.4 GHz band. The frequency bandwidth of each component carrier may be a frequency bandwidth narrower than 20 MHz, and the frequency bandwidth may be different from each other. The base station apparatus determines the number of uplink or downlink component carriers to be allocated to the mobile station apparatus based on various factors such as the amount of data buffer remaining, the reception quality of the mobile station apparatus, the load in the cell and the QoS. You can increase or decrease the number. Note that the number of uplink component carriers assigned by the base station apparatus is preferably equal to or less than the number of downlink component carriers.
[物理チャネル]
次に、EUTRAおよびAdvanced EUTRAで使用される主な物理チャネル(または、物理シグナル)について説明する。チャネルとは信号の送信に用いられる媒体を意味し、物理チャネルとは信号の送信に用いられる物理的な媒体を意味する。物理チャネルは、EUTRAおよび/またはAdvanced EUTRAにおいて、今後追加、または、その構造が変更される可能性もあるが、変更された場合でも本発明に従う実施形態の内容には影響しない。 [Physical channel]
Next, main physical channels (or physical signals) used in EUTRA and Advanced EUTRA will be described. A channel means a medium used for signal transmission, and a physical channel means a physical medium used for signal transmission. The physical channel may be added or changed in the future in EUTRA and / or Advanced EUTRA, but even if it is changed, the content of the embodiment according to the present invention is not affected.
次に、EUTRAおよびAdvanced EUTRAで使用される主な物理チャネル(または、物理シグナル)について説明する。チャネルとは信号の送信に用いられる媒体を意味し、物理チャネルとは信号の送信に用いられる物理的な媒体を意味する。物理チャネルは、EUTRAおよび/またはAdvanced EUTRAにおいて、今後追加、または、その構造が変更される可能性もあるが、変更された場合でも本発明に従う実施形態の内容には影響しない。 [Physical channel]
Next, main physical channels (or physical signals) used in EUTRA and Advanced EUTRA will be described. A channel means a medium used for signal transmission, and a physical channel means a physical medium used for signal transmission. The physical channel may be added or changed in the future in EUTRA and / or Advanced EUTRA, but even if it is changed, the content of the embodiment according to the present invention is not affected.
EUTRAおよびAdvanced EUTRAでは、物理チャネルのスケジューリングは、無線フレームを用いて管理される。1無線フレームは10msであり、1無線フレームは10サブフレームで構成される。さらに、1サブフレームは、2スロットで構成される(すなわち、1スロットは0.5msである)。また、物理チャネルが配置されるスケジューリングの最小単位としてリソースブロックを用いて管理される。リソースブロックは、周波数軸を複数サブキャリア(例えば12サブキャリア)の集合で構成される一定の周波数領域と、一定の送信時間間隔(1スロット)で構成される時間領域とで定義される。
In EUTRA and Advanced EUTRA, physical channel scheduling is managed using radio frames. One radio frame is 10 ms, and one radio frame is composed of 10 subframes. Further, one subframe is composed of two slots (that is, one slot is 0.5 ms). Also, management is performed using resource blocks as the minimum scheduling unit in which physical channels are arranged. The resource block is defined by a constant frequency region composed of a set of a plurality of subcarriers (for example, 12 subcarriers) and a time region composed of a constant transmission time interval (1 slot).
同期シグナル(Synchronization Signals)は、3種類のプライマリ同期シグナルと、周波数領域で互い違いに配置される31種類の符号からなるセカンダリ同期シグナルとで構成される。プライマリ同期シグナルとセカンダリ同期シグナルの信号との組み合わせによって、基地局装置を識別する504通りのセル識別子(セルID:Physical Cell Identity;PCI)と、無線同期のためのフレームタイミングとが示される。移動局装置は、セルサーチによって、受信した同期シグナルのセルIDを特定する。
Synchronization signals (Synchronization Signals) are composed of three types of primary synchronization signals and secondary synchronization signals composed of 31 types of codes arranged alternately in the frequency domain. A combination of the primary synchronization signal and the secondary synchronization signal indicates 504 cell identifiers (cell ID: Physical Cell Identity; PCI) for identifying the base station apparatus and frame timing for radio synchronization. The mobile station device identifies the cell ID of the received synchronization signal by cell search.
物理報知情報チャネル(PBCH;Physical Broadcast Channel)は、セル内の移動局装置で共通に用いられる制御パラメータ(報知情報(システム情報:System information))を通知する目的で送信される。物理報知情報チャネルで通知されない報知情報は、送信に用いられる無線リソースが物理下りリンク制御チャネルで通知された上で、物理下りリンク共用チャネルによってレイヤ3メッセージ(システムインフォメーション)で送信される。報知情報として、セル個別の識別子を示すセルグローバル識別子(CGI;Cell Global Identifier)、ページングによる待ち受けエリアを管理するトラッキングエリア識別子(TAI;Tracking Area Identifier)、ランダムアクセス制御情報などが通知される。
The physical broadcast information channel (PBCH; Physical Broadcast Channel) is transmitted for the purpose of notifying control parameters (broadcast information (system information: System information)) commonly used in mobile station apparatuses in the cell. Broadcast information that is not notified in the physical broadcast information channel is transmitted in a layer 3 message (system information) through the physical downlink shared channel after the radio resource used for transmission is notified in the physical downlink control channel. As broadcast information, a cell global identifier (CGI; Cell Global Identifier) indicating a cell-specific identifier, a tracking area identifier (TAI; Tracking Area Identifier) for managing a paging standby area, random access control information, and the like are notified.
下りリンクリファレンスシグナルは、セル毎に所定の電力で送信されるパイロットシグナルである。また、下りリンクリファレンスシグナルは、所定の規則に従う周波数および時間位置で周期的に繰り返される既知の信号である。移動局装置は、下りリンクリファレンスシグナルを受信することでセル毎の受信品質を測定する。また、移動局装置は、下りリンクリファレンスシグナルと同時に送信される、物理下りリンク制御チャネルまたは物理下りリンク共用チャネルの復調のための参照用の信号としても、下りリンクリファレンスシグナルを使用する。下りリンクリファレンスシグナルに使用される系列は、セル毎に識別可能な系列が用いられる。なお、下りリンクリファレンスシグナルは、セル固有RS(Cell-specific reference signals)と記載される場合もあるが、その用途と意味は同じである。
The downlink reference signal is a pilot signal transmitted at a predetermined power for each cell. The downlink reference signal is a known signal that is periodically repeated at a frequency and a time position according to a predetermined rule. The mobile station apparatus measures the reception quality for each cell by receiving the downlink reference signal. The mobile station apparatus also uses the downlink reference signal as a reference signal for simultaneous demodulation of the physical downlink control channel or the physical downlink shared channel that is transmitted simultaneously with the downlink reference signal. As a sequence used for the downlink reference signal, a sequence that can be identified for each cell is used. The downlink reference signal may be described as a cell-specific RS (Cell-specific reference signals), but its use and meaning are the same.
物理下りリンク制御チャネル(PDCCH;Physical Downlink Control Channel)は、各サブフレームの先頭からいくつかのOFDMシンボルで送信され、移動局装置に対して、基地局装置のスケジューリングに従った無線リソース割り当て情報や、送信電力の増減の調整量を指示する目的で使用される。移動局装置は、下りリンクデータや、下りリンク制御データであるレイヤ3メッセージ(ページング、ハンドオーバーコマンドなど)を送受信する前に、自局宛の物理下りリンク制御チャネルを監視(モニタ)し、自局宛の物理下りリンク制御チャネルを受信することで、送信時には上りリンクグラント、受信時には下りリンクグラント(下りリンクアサインメント)と呼ばれるそれぞれの無線リソース割り当て情報を、物理下りリンク制御チャネルから取得する必要がある。
A physical downlink control channel (PDCCH; Physical Downlink Control Channel) is transmitted in several OFDM symbols from the top of each subframe, and radio resource allocation information according to the scheduling of the base station apparatus is transmitted to the mobile station apparatus. It is used for the purpose of instructing the adjustment amount of increase / decrease of transmission power. The mobile station apparatus monitors (monitors) the physical downlink control channel addressed to itself before transmitting / receiving downlink data or layer 3 messages (paging, handover command, etc.) that are downlink control data. Receiving the physical downlink control channel addressed to the station, it is necessary to acquire from the physical downlink control channel each radio resource allocation information called uplink grant during transmission and downlink grant (downlink assignment) during reception There is.
物理上りリンク制御チャネル(PUCCH;Physical Uplink Control Channel)は、物理下りリンク共用チャネルで送信されたデータの受信確認応答(ACK/NACK:Acknowledgement/Negative Acknowledgement)、下りリンクの伝搬路情報(CQI:Channel Quality Indicator)、および上りリンクの無線リソース要求であるスケジューリングリクエスト(SR:Scheduling Request)を通知するために使用される。
The physical uplink control channel (PUCCH; Physical Uplink Control Channel) includes a data acknowledgment confirmation (ACK / NACK: Acknowledgement / Negative Acknowledgement) and downlink propagation path information C (QQn): Q I It is used to notify a quality request (SR: Scheduling Request) that is an uplink radio resource request.
物理下りリンク共用チャネル(PDSCH;Physical Downlink Shared Channel)は、下りリンクデータの他、下りリンク制御データであるレイヤ3メッセージとして、ページングや物理報知情報チャネルに含まれない報知情報を移動局装置へ通知するためにも使用される。物理下りリンク共用チャネルの無線リソース割り当て情報は、物理下りリンク制御チャネルで示される。
The physical downlink shared channel (PDSCH; Physical Downlink Shared Channel) notifies the mobile station apparatus of not only downlink data but also broadcast information not included in the physical broadcast information channel as a layer 3 message that is downlink control data. Also used to do. The radio resource allocation information of the physical downlink shared channel is indicated by the physical downlink control channel.
物理上りリンク共用チャネル(PUSCH;Physical Uplink Shared Channel)は、主に、上りリンクデータおよび上りリンク制御データを送信するが、下りリンクの受信品質やACK/NACKなどの制御データを含めることも可能である。また、物理下りリンク共用チャネルと同様に、物理上りリンク共用チャネルの無線リソース割り当て情報は、物理下りリンク制御チャネルで示される。
The physical uplink shared channel (PUSCH: Physical Uplink Shared Channel) mainly transmits uplink data and uplink control data, but can also include control data such as downlink reception quality and ACK / NACK. is there. Similarly to the physical downlink shared channel, the radio resource allocation information of the physical uplink shared channel is indicated by the physical downlink control channel.
上りリンクリファレンスシグナル(上りリンク参照信号:Uplink Reference Signal;上りリンクパイロット信号、または上りリンクパイロットチャネルとも称する)は、復調参照信号(DRS:Demodulation Reference Signal)と、サウンディング参照信号(SRS:Sounding Reference Signal)とを含む。復調参照信号は、基地局装置が、物理上りリンク制御チャネルPUCCHおよび/または物理上りリンク共用チャネルPUSCHを復調するために使用する。サウンディング参照信号は、基地局装置が、主に、上りリンクのチャネル状態を推定するために使用する。
An uplink reference signal (uplink reference signal: Uplink Reference Signal; also referred to as an uplink pilot signal or an uplink pilot channel) includes a demodulation reference signal (DRS: Demodulation Reference Signal) and a sounding reference signal (SRS: Sounding Reference Signal). ). The demodulation reference signal is used by the base station apparatus to demodulate the physical uplink control channel PUCCH and / or the physical uplink shared channel PUSCH. The sounding reference signal is mainly used by the base station apparatus to estimate the uplink channel state.
物理ランダムアクセスチャネル(PRACH;Physical Random Access Channel)は、プリアンブル系列を通知するために使用されるチャネルであり、ガードタイムを有する。プリアンブル系列は、64種類のシーケンスを用意して、6ビットの情報を表現するように構成されている。物理ランダムアクセスチャネルは、移動局装置から基地局装置へのアクセス手段として用いられる。移動局装置は、物理ランダムアクセスチャネルを用いて、物理上りリンク制御チャネル未設定時に無線リソースを基地局装置へ要求したり、上りリンク送信タイミングを基地局装置の受信タイミングウィンドウに合わせるために必要な送信タイミング調整情報(タイミングアドバンス(TA:Timing Advance)とも称される)を基地局装置へ要求したりする。具体的には、移動局装置は、基地局装置より設定された物理ランダムアクセスチャネル用の無線リソースを用いて、プリアンブル系列を送信する。移動局装置は、送信タイミング調整情報を受信すると、送信タイミング調整情報の有効時間を計時する送信タイミングタイマー(TA timer)を設定し、有効時間中を送信タイミング調整状態とし、有効期間外を送信タイミング非調整状態(送信タイミング未調整状態)として、状態を管理する。なお、それ以外の物理チャネルは、本発明の実施形態には直接的には関わらないため、詳細な説明は行なわない。
A physical random access channel (PRACH) is a channel used for notifying a preamble sequence and has a guard time. The preamble sequence is configured to represent 6-bit information by preparing 64 types of sequences. The physical random access channel is used as an access means from the mobile station apparatus to the base station apparatus. The mobile station device uses the physical random access channel to request radio resources from the base station device when the physical uplink control channel is not set, or to match the uplink transmission timing with the reception timing window of the base station device. Request transmission timing adjustment information (also referred to as timing advance (TA)) to the base station apparatus. Specifically, the mobile station apparatus transmits a preamble sequence using the radio resource for the physical random access channel set by the base station apparatus. When the mobile station device receives the transmission timing adjustment information, the mobile station device sets a transmission timing timer (TA timer) that measures the effective time of the transmission timing adjustment information, sets the transmission timing adjustment state during the effective time, and transmits the transmission timing outside the effective period The state is managed as an unadjusted state (transmission timing unadjusted state). The other physical channels are not directly related to the embodiment of the present invention, and thus will not be described in detail.
[ランダムアクセス手順]
本明細書において、ランダムアクセスに関する一連の手順のことをランダムアクセス手順と称す。ランダムアクセス手順は、Contention based Random Access(競合ベースランダムアクセス)手順と、Non-contention based Random Access(非競合ベースランダムアクセス)手順とを含む。 [Random access procedure]
In this specification, a series of procedures relating to random access is referred to as a random access procedure. The random access procedure includes a contention based random access (contention based random access) procedure and a non-contention based random access (non-contention based random access) procedure.
本明細書において、ランダムアクセスに関する一連の手順のことをランダムアクセス手順と称す。ランダムアクセス手順は、Contention based Random Access(競合ベースランダムアクセス)手順と、Non-contention based Random Access(非競合ベースランダムアクセス)手順とを含む。 [Random access procedure]
In this specification, a series of procedures relating to random access is referred to as a random access procedure. The random access procedure includes a contention based random access (contention based random access) procedure and a non-contention based random access (non-contention based random access) procedure.
Contention based Random Access手順は、異なる移動局装置が送信したプリアンブル系列が衝突(contention)する可能性のあるランダムアクセス手順である。Contention based Random Access手順は、典型的には、移動局装置が基地局装置と接続(通信)していない状態からの初期アクセスのためや、移動局装置が基地局装置と接続している状態からの上りリンクの送信リソースを要求するスケジューリングリクエストのためなどに使用される。プリアンブル系列が衝突するということは、複数の移動局装置が、同じプリアンブル系列を用いるとともに、同一の周波数および時間リソースを用いて、物理ランダムアクセスチャネルを送信することを意味する。なお、プリアンブル系列の衝突は、ランダムアクセスの衝突とも称される。
The Contention based Random Access procedure is a random access procedure in which preamble sequences transmitted by different mobile station apparatuses may collide. The Contention based Random Access procedure is typically used for initial access from a state in which the mobile station device is not connected (communication) to the base station device or from a state in which the mobile station device is connected to the base station device. This is used for a scheduling request for requesting uplink transmission resources. The collision of preamble sequences means that a plurality of mobile station apparatuses use the same preamble sequence and transmit physical random access channels using the same frequency and time resources. Note that a preamble sequence collision is also referred to as a random access collision.
Non-contention based Random Access手順は、異なる移動局装置が送信したプリアンブル系列に衝突が発生しないランダムアクセス手順である。Non-contention based Random Access手順は、典型的には、移動局装置が基地局装置と接続(通信)している状態であり、かつ上りリンクの同期が外れている状態で、基地局装置の指示により開始される。Non-contention based Random Access手順の開始は、RRC(Radio Resource Control:Layer3)層のメッセージおよび物理下りリンク制御チャネルPDCCHの制御データにより、指示される。
The Non-contention based Random Access procedure is a random access procedure in which no collision occurs in preamble sequences transmitted by different mobile station apparatuses. The non-contention based Random Access procedure is typically a state in which the mobile station device is connected (communication) with the base station device and the uplink is out of synchronization. Is started. The start of the Non-contention based Random Access procedure is instructed by an RRC (Radio Resource Control: Layer 3) layer message and control data of the physical downlink control channel PDCCH.
Non-contention based Random Access手順で使用するプリアンブル系列(個別プリアンブル(dedicated preamble))は、基地局装置より個別に移動局装置へ通知される。Contention based Random Access手順で使用されるプリアンブル系列は、ランダムアクセス時に、個別プリアンブルとして使用されないプリアンブル系列から移動局装置がランダムに一つ選択して使用する。あるセルで移動局装置が使用可能なプリアンブル系列のうち、Contention based Random Access手順およびNon-contention based Random Access手順でそれぞれ使用されるプリアンブル系列の数は、基地局装置から通知される。
The preamble sequence (dedicated preamble) used in the Non-contention based Random Access procedure is individually notified from the base station apparatus to the mobile station apparatus. The preamble sequence used in the Contention based Random Access procedure is randomly selected by the mobile station apparatus from the preamble sequences that are not used as individual preambles during random access. Among the preamble sequences that can be used by the mobile station apparatus in a certain cell, the number of preamble sequences used in the Contention based Random Access procedure and the Non-contention based Random Access procedure is notified from the base station apparatus.
次に、図1を参照して、Contention based Random Access手順を簡単に説明する。まず、移動局装置1は、下りリンクの無線伝搬路状態(パスロス)および/またはメッセージ3(ステップS3で送信されるメッセージ)のサイズに基づいて選択した、プリアンブル系列(ランダムアクセスプリアンブル)を基地局装置2へ送信する(ステップS1)。基地局装置2は、ランダムアクセスプリアンブルを受信すると、ランダムアクセスプリアンブルから移動局装置1と基地局装置2との間の送信タイミングのずれ量を算出し、ランダムアクセスプリアンブルに対する応答(ランダムアクセスレスポンス)に、送信タイミングのずれを調整するための送信タイミング調整情報を含めて、移動局装置1へ送信する(ステップS2)。
Next, with reference to FIG. 1, the contention based random access procedure will be briefly described. First, the mobile station apparatus 1 selects a preamble sequence (random access preamble) selected based on the downlink radio channel state (path loss) and / or the size of the message 3 (message transmitted in step S3). It transmits to the apparatus 2 (step S1). When the base station apparatus 2 receives the random access preamble, the base station apparatus 2 calculates a transmission timing shift amount between the mobile station apparatus 1 and the base station apparatus 2 from the random access preamble, and returns a response to the random access preamble (random access response). The transmission timing adjustment information for adjusting the transmission timing deviation is transmitted to the mobile station apparatus 1 (step S2).
移動局装置1は、ランダムアクセスレスポンスの中身を確認し、ランダムアクセスレスポンスに、送信したランダムアクセスプリアンブルに対応するプリアンブル番号が含まれている場合、送信タイミング調整情報に基づいて、上りリンク送信タイミングを調整する。移動局装置1は、送信タイミングを調整した場合に、調整した後の送信タイミングが有効である送信タイミングタイマー(TA timer)をスタートする。また、移動局装置1は、ランダムアクセスレスポンスに含まれているスケジューリング情報に従って、上位レイヤのメッセージ(上位レイヤメッセージおよび/またはRRCメッセージ)を基地局装置2へ送信する(ステップS3)。基地局装置2は、ステップS3の上位レイヤメッセージを受信できた移動局装置1に衝突確認メッセージ(コンテンションレゾリューション、Contention resolution)を送信する(ステップS4)。これにより、手順が完了する。
The mobile station apparatus 1 confirms the content of the random access response, and when the random access response includes a preamble number corresponding to the transmitted random access preamble, the mobile station apparatus 1 determines the uplink transmission timing based on the transmission timing adjustment information. adjust. When adjusting the transmission timing, the mobile station apparatus 1 starts a transmission timing timer (TA timer) in which the adjusted transmission timing is valid. Also, the mobile station apparatus 1 transmits an upper layer message (upper layer message and / or RRC message) to the base station apparatus 2 in accordance with the scheduling information included in the random access response (step S3). The base station apparatus 2 transmits a collision confirmation message (contention resolution, contention resolution) to the mobile station apparatus 1 that has received the upper layer message of step S3 (step S4). This completes the procedure.
次に、図2を参照して、Non-contention based Random Access手順を簡単に説明する。まず、基地局装置2は、個別プリアンブルの番号と、使用する物理ランダムアクセスチャネルの番号(ランダムアクセスチャネル番号)とを、移動局装置1へ通知(ランダムアクセスプリアンブル割り当て)する(ステップS11)。ランダムアクセスチャネル番号とは、基地局装置2から移動局装置1へ通知される番号の個別プリアンブルの送信が許可される物理ランダムアクセスチャネル、を示す番号である。例えば、あるランダムアクセスチャネル番号は、全ての物理ランダムアクセスチャネルで個別プリアンブルが送信されてもよいことを示し、別のランダムアクセスチャネル番号は、時間方向で2個毎の物理ランダムアクセスチャネルで個別プリアンブルが送信されてもよいことを示す。移動局装置1は、指定された番号に対応するプリアンブル系列(個別プリアンブル)を、ランダムアクセスチャネル番号により示されている、個別プリアンブルの送信が許可される物理ランダムアクセスチャネルで送信する(ステップS12)。基地局装置2は、個別プリアンブルを受信すると、個別プリアンブルから移動局装置1と基地局装置2との間の送信タイミングのずれ量を算出し、個別プリアンブルに対する応答(ランダムアクセスレスポンス)に、送信タイミングのずれを調整するための送信タイミング調整情報を含めて、移動局装置1へ送信する(ステップS13)。これにより、手順が完了する。
Next, a non-contention based Random Access procedure will be briefly described with reference to FIG. First, the base station apparatus 2 notifies the mobile station apparatus 1 of the number of the dedicated preamble and the number of the physical random access channel to be used (random access channel number) (random access preamble allocation) (step S11). The random access channel number is a number indicating a physical random access channel in which transmission of an individual preamble with a number notified from the base station apparatus 2 to the mobile station apparatus 1 is permitted. For example, one random access channel number indicates that a dedicated preamble may be transmitted on all physical random access channels, and another random access channel number indicates a dedicated preamble on every second physical random access channel in the time direction. Indicates that it may be sent. The mobile station apparatus 1 transmits a preamble sequence (individual preamble) corresponding to the designated number on the physical random access channel indicated by the random access channel number and permitted to transmit the dedicated preamble (step S12). . When the base station apparatus 2 receives the dedicated preamble, the base station apparatus 2 calculates a transmission timing shift amount between the mobile station apparatus 1 and the base station apparatus 2 from the dedicated preamble, and transmits a response to the dedicated preamble (random access response) as a transmission timing. The transmission timing adjustment information for adjusting the deviation is transmitted to the mobile station apparatus 1 (step S13). This completes the procedure.
ただし、基地局装置2から通知されたプリアンブル番号の値が0の場合は、移動局装置1は、Non-contention based Random Access手順ではなく、Contention based Random Access手順を行なう。この場合、移動局装置1は、図1のステップS1~ステップS4の手順に従って、手順を完了する。
However, when the value of the preamble number notified from the base station apparatus 2 is 0, the mobile station apparatus 1 performs the contention based random access procedure instead of the non-contention based random access procedure. In this case, the mobile station apparatus 1 completes the procedure according to the procedure of steps S1 to S4 in FIG.
[パワーヘッドルーム報告]
パワーヘッドルームは、周波数(コンポーネントキャリアおよび/またはセル)毎に移動局装置で計算され、基地局装置へ通知される。移動局装置において、パワーヘッドルームは、RRC層から設定されたパラメータに基づいて物理層(レイヤ1)で計算され、MAC層で管理される。物理層は、計算した各コンポーネントキャリアのパワーヘッドルームの値をMAC層に対して通知する。 [Power Headroom Report]
The power headroom is calculated by the mobile station device for each frequency (component carrier and / or cell) and notified to the base station device. In the mobile station apparatus, the power headroom is calculated in the physical layer (layer 1) based on parameters set from the RRC layer and managed in the MAC layer. The physical layer notifies the MAC layer of the calculated power headroom value of each component carrier.
パワーヘッドルームは、周波数(コンポーネントキャリアおよび/またはセル)毎に移動局装置で計算され、基地局装置へ通知される。移動局装置において、パワーヘッドルームは、RRC層から設定されたパラメータに基づいて物理層(レイヤ1)で計算され、MAC層で管理される。物理層は、計算した各コンポーネントキャリアのパワーヘッドルームの値をMAC層に対して通知する。 [Power Headroom Report]
The power headroom is calculated by the mobile station device for each frequency (component carrier and / or cell) and notified to the base station device. In the mobile station apparatus, the power headroom is calculated in the physical layer (layer 1) based on parameters set from the RRC layer and managed in the MAC layer. The physical layer notifies the MAC layer of the calculated power headroom value of each component carrier.
移動局装置のMAC層は、以下のいずれかのトリガ条件が満たされた場合に、パワーヘッドルームの報告タイミングであると判断し、データの制御ヘッダー部分に含まれるMAC制御要素を用いて、PHRを基地局装置へ送信する。トリガ条件は、(1)PHR報告禁止タイマー(Prohibit PHR timer)が停止しているときであって、かつサービングセルのパスロス値が前回PHRを報告したときよりも所定の値以上劣化したとき、(2)PHR周期タイマー(Periodic PHR timer)が満了したとき、(3)PHRの設定が変更されたとき、(4)セカンダリセルを活性化したとき、である。
The MAC layer of the mobile station apparatus determines that it is the power headroom reporting timing when any of the following trigger conditions is satisfied, and uses the MAC control element included in the control header portion of the data to determine the PHR. Is transmitted to the base station apparatus. The trigger condition is (1) when the PHR report prohibition timer (Prohibit PHR timer) is stopped, and when the path loss value of the serving cell is deteriorated by a predetermined value or more than when the previous PHR was reported, (2 ) When the PHR period timer expires, (3) when the PHR setting is changed, and (4) when the secondary cell is activated.
Advanced ETURAでは、PHRとして2種類の報告形式が規定されている。
In Advanced ETURA, two types of reporting formats are defined as PHR.
一つ目の報告形式(タイプ1)は、移動局装置があるサブフレームにおいて物理上りリンク共用チャネルPUSCHのみを送信可能な場合に、適用される報告形式である。タイプ1のPHRは、PUSCHを送信しているサブフレームとPUSCHを送信していないサブフレームとで異なるPHRの計算方法を使用する。この詳細な計算方法は、3GPP TS36.213の記載に従う。
The first report format (type 1) is a report format applied when only the physical uplink shared channel PUSCH can be transmitted in a subframe in which the mobile station apparatus is present. Type 1 PHR uses different PHR calculation methods for subframes transmitting PUSCH and subframes not transmitting PUSCH. This detailed calculation method follows the description of 3GPP TS36.213.
二つ目の報告形式(タイプ2)は、移動局装置があるサブフレームにおいて物理上りリンク制御チャネルPUCCHと物理上りリンク共用チャネルPUSCHとを同時に送信可能な場合に、適用される報告形式である。タイプ2のPHRは、PUCCHとPUSCHとを同時に送信しているサブフレーム、PUSCHのみを送信しているサブフレーム、およびPUCCHのみを送信しているサブフレームについて、それぞれ異なるPHRの計算方法を使用する。この詳細な計算方法は3GPP TS36.213の記載に従う。
The second report format (type 2) is a report format applied when the physical uplink control channel PUCCH and the physical uplink shared channel PUSCH can be transmitted simultaneously in a subframe in which the mobile station apparatus is present. Type 2 PHR uses different PHR calculation methods for subframes transmitting PUCCH and PUSCH simultaneously, subframes transmitting only PUSCH, and subframes transmitting only PUCCH. . This detailed calculation method follows the description of 3GPP TS36.213.
基地局装置は、移動局装置から通知された移動局装置能力(UE Capability)に基づいて、タイプ1およびタイプ2のPHRの報告形式のうち、どちらを用いるかについて、レイヤ3メッセージを用いて移動局装置毎に設定する。
Based on the mobile station apparatus capability (UE capability) notified from the mobile station apparatus, the base station apparatus moves using a layer 3 message as to which of the type 1 and type 2 PHR report formats is to be used. Set for each station device.
[本発明の通信ネットワーク構成の例]
図3は、本発明の実施形態に係る通信ネットワーク構成の一例を示す図である。移動局装置1は、キャリア・アグリゲーションによって、複数の周波数(コンポーネントキャリア)Band1~Band3を同時に用いて基地局装置2と無線接続することが可能であるとする。この場合、通信ネットワーク構成としては、ある一つの基地局装置2が複数の周波数毎に送信装置11~13(および図示しない受信装置21~23)を有しており、各周波数の制御を一つの基地局装置2で行なう構成が制御の簡略化の観点から好適である。基地局装置2の構成は、図3に限定されない。ただし、複数の周波数が連続する周波数であるなどの理由から、基地局装置2が一つの送信装置で複数の周波数の送信を行なうような構成であってもよい。さらには、周波数毎に送受信のタイミングが異なるような構成であってもよい。送信装置および受信装置の数や送受信可能な周波数が異なっていてもよい。基地局装置2の送信装置によって制御される各周波数の通信可能範囲は、セルとしてみなされる。このとき、各周波数がカバーするエリア(セル)は、それぞれ異なる広さ、および/または、異なる形状であってもよい。 [Example of communication network configuration of the present invention]
FIG. 3 is a diagram showing an example of a communication network configuration according to the embodiment of the present invention. Themobile station apparatus 1 can be wirelessly connected to the base station apparatus 2 by simultaneously using a plurality of frequencies (component carriers) Band1 to Band3 by carrier aggregation. In this case, as a communication network configuration, one base station apparatus 2 has transmitting apparatuses 11 to 13 (and receiving apparatuses 21 to 23 (not shown)) for a plurality of frequencies, and each frequency is controlled by one. A configuration performed by the base station apparatus 2 is preferable from the viewpoint of simplification of control. The configuration of the base station apparatus 2 is not limited to FIG. However, the base station device 2 may be configured to transmit a plurality of frequencies with a single transmission device because the plurality of frequencies are continuous frequencies. Furthermore, a configuration in which transmission / reception timing differs for each frequency may be employed. The number of transmitters and receivers and the frequency at which transmission and reception can be performed may be different. The communicable range of each frequency controlled by the transmission device of the base station device 2 is regarded as a cell. At this time, the areas (cells) covered by the respective frequencies may have different widths and / or different shapes.
図3は、本発明の実施形態に係る通信ネットワーク構成の一例を示す図である。移動局装置1は、キャリア・アグリゲーションによって、複数の周波数(コンポーネントキャリア)Band1~Band3を同時に用いて基地局装置2と無線接続することが可能であるとする。この場合、通信ネットワーク構成としては、ある一つの基地局装置2が複数の周波数毎に送信装置11~13(および図示しない受信装置21~23)を有しており、各周波数の制御を一つの基地局装置2で行なう構成が制御の簡略化の観点から好適である。基地局装置2の構成は、図3に限定されない。ただし、複数の周波数が連続する周波数であるなどの理由から、基地局装置2が一つの送信装置で複数の周波数の送信を行なうような構成であってもよい。さらには、周波数毎に送受信のタイミングが異なるような構成であってもよい。送信装置および受信装置の数や送受信可能な周波数が異なっていてもよい。基地局装置2の送信装置によって制御される各周波数の通信可能範囲は、セルとしてみなされる。このとき、各周波数がカバーするエリア(セル)は、それぞれ異なる広さ、および/または、異なる形状であってもよい。 [Example of communication network configuration of the present invention]
FIG. 3 is a diagram showing an example of a communication network configuration according to the embodiment of the present invention. The
ただし、後述する記載において、基地局装置2が構成するコンポーネントキャリアの周波数でカバーされるエリアのことを、それぞれセルと称して説明するが、これは実際に運用される通信システムにおけるセルの定義とは異なる可能性があることに注意されたい。例えば、ある通信システムでは、キャリア・アグリゲーションによって用いられるコンポーネントキャリアの一部のことを、セルではなく単なる追加の無線リソースと定義するかもしれない。また、従来のセルとは異なる拡張セルとして定義するかもしれない。本発明に係る実施形態において、コンポーネントキャリアをセルと称することで、実際に運用される通信システムにおけるセルの定義と異なる場合が発生したとしても、本発明の主旨には影響しない。なお、キャリア・アグリゲーションは、複数のコンポーネントキャリアを用いた複数のセルによる通信であり、セル・アグリゲーションとも称される。なお、移動局装置1は、周波数毎にリレー局装置(または、リピーター)を介して基地局装置2と無線接続されてもよい。すなわち、本発明に係る実施形態における基地局装置2は、リレー局装置に置き換えることができる。
However, in the description to be described later, the areas covered by the frequency of the component carrier configured by the base station apparatus 2 are each referred to as a cell, and this is the definition of the cell in the actually operated communication system. Note that may be different. For example, in some communication systems, some of the component carriers used by carrier aggregation may be defined simply as additional radio resources rather than cells. Moreover, it may be defined as an extended cell different from the conventional cell. In the embodiment according to the present invention, even when a component carrier is referred to as a cell and a case where the component carrier is different from the definition of a cell in an actually operated communication system occurs, the gist of the present invention is not affected. Note that carrier aggregation is communication performed by a plurality of cells using a plurality of component carriers, and is also referred to as cell aggregation. The mobile station apparatus 1 may be wirelessly connected to the base station apparatus 2 via a relay station apparatus (or repeater) for each frequency. That is, the base station apparatus 2 in the embodiment according to the present invention can be replaced with a relay station apparatus.
なお、3GPPが規定する第3世代の基地局装置2は、ノードB(NodeB)と称され、EUTRAおよびAdvanced EUTRAにおける基地局装置は、イーノードB(eNodeB)と称される。なお、3GPPが規定する第3世代の移動局装置1は、ユーイー(UE:User Equipment)と称される。基地局装置2は、移動局装置1が通信可能なエリアであるセルを管理する。セルは、移動局装置1と通信可能なエリアの大きさに応じて、マクロセル、フェムトセル、ピコセル、またはナノセルとも称される。移動局装置1がある基地局装置2と通信可能であるとき、その基地局装置2のセルのうち、移動局装置1との通信に使用しているセルは、在圏セル(Serving cell)と称され、その他のセルは、周辺セル(Neighboring cell)と称される。つまり、キャリア・アグリゲーションを用いて、移動局装置1と基地局装置2とが複数のセルを用いて通信している場合、在圏セルは複数存在することになる。
The third generation base station apparatus 2 defined by 3GPP is referred to as Node B (Node B), and the base station apparatus in EUTRA and Advanced EUTRA is referred to as E Node B (eNode B). Note that the third-generation mobile station apparatus 1 defined by 3GPP is referred to as UE (User Equipment). The base station apparatus 2 manages cells that are areas in which the mobile station apparatus 1 can communicate. The cell is also referred to as a macro cell, a femto cell, a pico cell, or a nano cell depending on the size of an area that can communicate with the mobile station apparatus 1. When the mobile station device 1 is communicable with a certain base station device 2, the cell used for communication with the mobile station device 1 among the cells of the base station device 2 is a serving cell. The other cells are referred to as neighboring cells (Neighboring cells). That is, when the mobile station apparatus 1 and the base station apparatus 2 communicate using a plurality of cells using carrier aggregation, there are a plurality of serving cells.
[コンポーネントキャリアの構成の設定例]
図4は、本発明の実施形態に係る移動局装置1がキャリア・アグリゲーションを行なう場合に、基地局装置2が移動局装置1に対して設定する、下りリンクコンポーネントキャリアと上りリンクコンポーネントキャリアとの対応関係の一例を示した図である。図4では、2個の下りリンクコンポーネントキャリア(下りリンクコンポーネントキャリアDL_CC1、下りリンクコンポーネントキャリアDL_CC2)と2個の上りリンクコンポーネントキャリア(上りリンクコンポーネントキャリアUL_CC1、上りリンクコンポーネントキャリアUL_CC2)との対応関係について示すが、本発明が2個のコンポーネントキャリアの場合に限定されるということではない。図4中の下りリンクコンポーネントキャリアDL_CC1と上りリンクコンポーネントキャリアUL_CC1、および下りリンクコンポーネントキャリアDL_CC2と上りリンクコンポーネントキャリアUL_CC2が、それぞれセル固有接続(Cell Specific Linkage)している。 [Component carrier configuration setting example]
FIG. 4 shows the downlink component carrier and the uplink component carrier that thebase station device 2 sets for the mobile station device 1 when the mobile station device 1 according to the embodiment of the present invention performs carrier aggregation. It is the figure which showed an example of the correspondence. In FIG. 4, the correspondence relationship between two downlink component carriers (downlink component carrier DL_CC1, downlink component carrier DL_CC2) and two uplink component carriers (uplink component carrier UL_CC1, uplink component carrier UL_CC2). As shown, the present invention is not limited to the case of two component carriers. In FIG. 4, the downlink component carrier DL_CC1 and the uplink component carrier UL_CC1, and the downlink component carrier DL_CC2 and the uplink component carrier UL_CC2 are respectively cell-specific connected (Cell Specific Linkage).
図4は、本発明の実施形態に係る移動局装置1がキャリア・アグリゲーションを行なう場合に、基地局装置2が移動局装置1に対して設定する、下りリンクコンポーネントキャリアと上りリンクコンポーネントキャリアとの対応関係の一例を示した図である。図4では、2個の下りリンクコンポーネントキャリア(下りリンクコンポーネントキャリアDL_CC1、下りリンクコンポーネントキャリアDL_CC2)と2個の上りリンクコンポーネントキャリア(上りリンクコンポーネントキャリアUL_CC1、上りリンクコンポーネントキャリアUL_CC2)との対応関係について示すが、本発明が2個のコンポーネントキャリアの場合に限定されるということではない。図4中の下りリンクコンポーネントキャリアDL_CC1と上りリンクコンポーネントキャリアUL_CC1、および下りリンクコンポーネントキャリアDL_CC2と上りリンクコンポーネントキャリアUL_CC2が、それぞれセル固有接続(Cell Specific Linkage)している。 [Component carrier configuration setting example]
FIG. 4 shows the downlink component carrier and the uplink component carrier that the
セル固有接続とは、例えば、移動局装置1がキャリア・アグリゲーションしていない場合に、基地局装置2にアクセス可能な上りリンクと下りリンクとの周波数の対応関係(連携関係)であり、典型的には、報知情報の一部(SIB2:System Information Block Type2)でその対応関係が示される。セル固有接続は、SIB2 linkageとも称される。セルにおける上りリンクと下りリンクとの周波数の対応関係は、報知情報に周波数情報として明示的に指示される。あるいは、明示的に指示されない場合には、運用周波数毎に一意に決められる上りリンクと下りリンクとの規定の周波数差の情報を用いるなどして、対応関係が暗黙的に指示される。これらの方法に限らず、セル毎に上りリンクと下りリンクとの周波数の対応関係を示すことが可能であれば、これ以外の方法を用いて指示されてもよい。
The cell-specific connection is, for example, a correspondence relationship (linkage relationship) between uplink and downlink frequencies accessible to the base station device 2 when the mobile station device 1 is not carrier-aggregated. The part of the broadcast information (SIB2: System Information Block Type2) indicates the corresponding relationship. The cell specific connection is also referred to as SIB2 linkage. The correspondence relationship between the uplink and downlink frequencies in the cell is explicitly indicated as frequency information in the broadcast information. Alternatively, when not explicitly instructed, the correspondence relationship is instructed implicitly by using information on the prescribed frequency difference between the uplink and the downlink uniquely determined for each operating frequency. In addition to these methods, other methods may be used as long as the correspondence relationship between uplink and downlink frequencies can be shown for each cell.
これに対し、基地局装置2は、下りリンクコンポーネントキャリアと上りリンクコンポーネントキャリアとの対応関係を、セル固有接続とは別に、移動局装置1毎に個別に設定(個別接続;UE Specific Linkage)することも可能である。このとき、個別接続の設定は、RRCメッセージ(レイヤ3メッセージ)で示される。基地局装置2は、物理ランダムアクセスチャネルの送信に必要な設定(コンフィギュレーション)を、上りリンクコンポーネントキャリア毎、または上りリンク周波数毎に、複数割り当てることも可能である。
On the other hand, the base station apparatus 2 individually sets the correspondence relationship between the downlink component carrier and the uplink component carrier for each mobile station apparatus 1 separately from the cell-specific connection (individual connection; UE Specific Linkage). It is also possible. At this time, the setting of the individual connection is indicated by an RRC message (layer 3 message). The base station apparatus 2 can also assign a plurality of settings (configurations) necessary for transmission of the physical random access channel for each uplink component carrier or each uplink frequency.
無線リソース要求用上りリンク制御チャネル設定が行われる上りリンクコンポーネントキャリアと、当該上りリンクコンポーネントキャリアとセル固有接続される下りリンクコンポーネントキャリアとから構成されるセルは、プライマリセル(PCell:Primary cell)と称される。また、プライマリセル以外のコンポーネントキャリアから構成されるセルは、セカンダリセル(SCell:Secondary cell)と称される。プライマリセルは、活性化/不活性化の制御の対象外であるが(つまり、常に活性化しているとみなされる)、セカンダリセルは、活性化/不活性化という状態を持つ。これらの状態の変更は、基地局装置2から明示的に指定される他、コンポーネントキャリア毎に移動局装置1に設定されるタイマーに基づいて行われる。プライマリセルとセカンダリセルとを合わせてサービングセル(在圏セル)とも称する。
A cell composed of an uplink component carrier in which radio resource request uplink control channel setting is performed and a downlink component carrier that is cell-specifically connected to the uplink component carrier is a primary cell (PCell: Primary cell). Called. Moreover, the cell comprised from component carriers other than a primary cell is called a secondary cell (SCell: Secondary cell). Although the primary cell is not subject to activation / inactivation control (that is, it is always considered to be activated), the secondary cell has a state of activation / inactivation. These state changes are performed based on a timer set in the mobile station apparatus 1 for each component carrier, in addition to being explicitly designated from the base station apparatus 2. The primary cell and the secondary cell are also collectively referred to as a serving cell.
ここで、コンポーネントキャリアの活性化または不活性化(すなわち、セカンダリセルの活性化または不活性化)は、レイヤ2の構成タスクで解釈可能なL2(レイヤ2)メッセージによって制御されるように構成される。すなわち、物理層(レイヤ1)でデコードされた後にレイヤ2で認識される制御コマンドによって、活性化または不活性化が制御される。なお、EUTRAおよびAdvanced EUTRAにおけるL2メッセージは、MAC層で解釈される制御コマンド(MAC制御要素:MAC Control Element)によって通知される。
Here, the activation or deactivation of the component carrier (ie, activation or deactivation of the secondary cell) is configured to be controlled by an L2 (Layer 2) message that can be interpreted by a Layer 2 configuration task. The That is, activation or deactivation is controlled by a control command recognized by layer 2 after being decoded by the physical layer (layer 1). Note that the L2 message in EUTRA and Advanced EUTRA is notified by a control command (MAC control element: MAC Control Element) interpreted in the MAC layer.
移動局装置1は、不活性化されたコンポーネントキャリア(セカンダリセル)のスケジューリングに用いる、上りリンクグラントおよび下りリンクグラント(下りリンクアサインメント)のモニタを停止してよい。すなわち、物理下りリンク制御チャネルのモニタを停止してよい。また、移動局装置1は、不活性化されたコンポーネントキャリア(セカンダリセル)の上りリンクに関して、サウンディングリファレンスシグナル(SRS:Sounding reference signal)と呼ばれる上りリンクパイロットチャネルの送信を停止してもよい。また、移動局装置1は、不活性化されたコンポーネントキャリア(セカンダリセル)の上りリンクに関して、物理上りリンク制御チャネルの送信を停止してもよい。また、移動局装置1は、不活性化されたコンポーネントキャリア(セカンダリセル)の下りリンクに関して、活性化した状態よりも低いサンプリングレートで測定を実施してもよい。
The mobile station device 1 may stop monitoring the uplink grant and the downlink grant (downlink assignment) used for scheduling the deactivated component carrier (secondary cell). That is, monitoring of the physical downlink control channel may be stopped. Moreover, the mobile station apparatus 1 may stop the transmission of the uplink pilot channel called a sounding reference signal (SRS) regarding the uplink of the deactivated component carrier (secondary cell). Moreover, the mobile station apparatus 1 may stop transmission of a physical uplink control channel regarding the uplink of the deactivated component carrier (secondary cell). Moreover, the mobile station apparatus 1 may implement a measurement with a sampling rate lower than the activated state regarding the downlink of the deactivated component carrier (secondary cell).
以上の事項を考慮しつつ、以下、添付図面に基づき、本発明の好適な実施形態について詳細に説明する。なお、本発明の実施形態の説明において、本発明に関連した公知の機能や構成についての具体的な説明が、本発明の趣旨を不明瞭にすると判断される場合には、その詳細な説明を行なわない。
In consideration of the above matters, preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the description of the embodiments of the present invention, if it is determined that specific descriptions of known functions and configurations related to the present invention will obscure the spirit of the present invention, detailed descriptions thereof will be given. Don't do it.
[第1の実施形態]
本発明の第1の実施形態について以下に説明する。本実施形態は、移動局装置1のキャリア・アグリゲーション時におけるパワーヘッドルーム報告方法に関し、特に、移動局装置1が複数の上りリンク送信タイミングを管理している場合のパワーヘッドルーム報告方法について示す。 [First Embodiment]
A first embodiment of the present invention will be described below. The present embodiment relates to a power headroom reporting method at the time of carrier aggregation of themobile station apparatus 1, and particularly shows a power headroom reporting method when the mobile station apparatus 1 manages a plurality of uplink transmission timings.
本発明の第1の実施形態について以下に説明する。本実施形態は、移動局装置1のキャリア・アグリゲーション時におけるパワーヘッドルーム報告方法に関し、特に、移動局装置1が複数の上りリンク送信タイミングを管理している場合のパワーヘッドルーム報告方法について示す。 [First Embodiment]
A first embodiment of the present invention will be described below. The present embodiment relates to a power headroom reporting method at the time of carrier aggregation of the
図5は、本発明の第1の実施形態に係る移動局装置1の概略構成例を示すブロック図である。移動局装置1は、受信部101、復調部102、復号部103、測定処理部104、制御部105、ランダムアクセス制御部106、符号部107、変調部108、送信部109、タイミング管理部110、上位レイヤ111、および、PHR計算部112を含む。上位レイヤ111は、無線リソース制御を執り行なうRRC(Radio Resource Control)を含む。また、ランダムアクセス制御部106は、データリンク層を管理するMAC(Medium Access Control)層の一部として機能する。
FIG. 5 is a block diagram showing a schematic configuration example of the mobile station apparatus 1 according to the first embodiment of the present invention. The mobile station apparatus 1 includes a reception unit 101, a demodulation unit 102, a decoding unit 103, a measurement processing unit 104, a control unit 105, a random access control unit 106, a coding unit 107, a modulation unit 108, a transmission unit 109, a timing management unit 110, An upper layer 111 and a PHR calculation unit 112 are included. The upper layer 111 includes RRC (Radio Resource Control) that performs radio resource control. The random access control unit 106 functions as a part of a MAC (Medium Access Control) layer that manages the data link layer.
受信に先立ち、上位レイヤ111より制御部105へ移動局装置制御情報が入力され、受信に関する制御情報が受信制御情報として、受信部101、復調部102、復号部103へ適切に入力される。移動局装置制御情報は、受信制御情報と送信制御情報とによって構成される、移動局装置1の無線通信制御に必要な情報であり、基地局装置2やシステムパラメータにより設定され、上位レイヤ111が必要に応じて制御部105へ入力する。また、受信制御情報は、受信周波数帯域の情報の他に、各チャネルに関する受信タイミング、多重方法、無線リソース配置情報などの情報を含む。
Prior to reception, mobile station apparatus control information is input from the upper layer 111 to the control unit 105, and control information related to reception is appropriately input to the reception unit 101, the demodulation unit 102, and the decoding unit 103 as reception control information. The mobile station apparatus control information is information necessary for radio communication control of the mobile station apparatus 1 configured by reception control information and transmission control information, and is set by the base station apparatus 2 and system parameters. Input to the control unit 105 as necessary. Further, the reception control information includes information such as reception timing, multiplexing method, and radio resource arrangement information regarding each channel in addition to information on the reception frequency band.
受信信号は、受信部101において受信される。受信部101は、受信制御情報で指定された周波数帯域で信号を受信する。受信された信号は、復調部102へと入力される。復調部102は、受信信号の復調を行ない、復号部103へ復調した信号を入力する。復号部103は、信号から下りリンクデータと下りリンク制御データとを正しく復号し、復号された各データを上位レイヤ111へ入力する。測定処理部104は、セル(コンポーネントキャリア)毎の下りリンクリファレンスシグナルの受信品質(SIR、SINR、RSRP、RSRQ、RSSI、パスロスなど)の測定結果や、物理下りリンク制御チャネルまたは物理下りリンク共用チャネルの受信誤り率の測定結果に基づいて、下りリンク測定情報を生成し、下りリンク測定情報を上位レイヤ111へ入力する。下りリンク測定情報は、上位レイヤ111において、無線リンク再確立を伴う無線リンク障害(Radio link failure)の検出、および上りリンク送信の停止を伴う無線リンク監視(Radio link monitoring)の実施のために用いられる。
The received signal is received by the receiving unit 101. The receiving unit 101 receives a signal in the frequency band specified by the reception control information. The received signal is input to the demodulation unit 102. Demodulation section 102 demodulates the received signal and inputs the demodulated signal to decoding section 103. The decoding unit 103 correctly decodes downlink data and downlink control data from the signal, and inputs each decoded data to the upper layer 111. The measurement processing unit 104 measures the measurement result of the downlink reference signal reception quality (SIR, SINR, RSRP, RSRQ, RSSI, path loss, etc.) for each cell (component carrier), the physical downlink control channel, or the physical downlink shared channel. Downlink measurement information is generated based on the measurement result of the reception error rate, and the downlink measurement information is input to the upper layer 111. The downlink measurement information is used in the upper layer 111 for detection of a radio link failure (Radio link failure) accompanied by radio link re-establishment and radio link monitoring (Radio link monitoring) accompanied by suspension of uplink transmission. It is done.
同様に、測定処理部104の下りリンク測定情報は、PHR計算部112へ入力される。PHR計算部112は、上位レイヤ111よりPHRの報告に必要なパラメータを含むPHR制御情報が設定される。PHR制御情報は、少なくとも、PHRの報告に関する複数のタイマー(PHR報告禁止タイマー、PHR周期タイマー)、PHRの報告形式(タイプ1またはタイプ2)、トリガ条件に用いるパスロスの変化の差分値、およびPHRの計算に関するオフセット値や係数を含む。
Similarly, the downlink measurement information of the measurement processing unit 104 is input to the PHR calculation unit 112. In the PHR calculation unit 112, PHR control information including parameters necessary for PHR reporting is set by the upper layer 111. The PHR control information includes at least a plurality of timers related to PHR reporting (PHR reporting prohibition timer, PHR period timer), a PHR reporting format (type 1 or type 2), a difference value of change in path loss used for a trigger condition, and PHR. Includes offset values and coefficients for the calculation of.
PHR計算部112は、設定済みのPHR制御情報と、下りリンク測定情報と、上りリンクの送信状態とに基づき、活性化しているコンポーネントキャリア(セカンダリセル)毎にパワーヘッドルームの値を計算する。また、PHR計算部112は、入力された下りリンク測定情報とPHR制御情報に含まれる複数のタイマーの状態とに基づいて、PHRのトリガ条件が満たされたかどうかを、サブフレーム毎に判断する。そして、PHR計算部112は、PHRのトリガ条件のいずれかが満たされたと判断したときに、トリガ時のサブフレームにおける上りリンクの物理チャネルの送信状態と、設定された報告形式と、下りリンク測定情報とに基づいて計算したPHRの値を、上位レイヤ111へ入力する。
The PHR calculation unit 112 calculates the value of the power headroom for each activated component carrier (secondary cell) based on the set PHR control information, downlink measurement information, and uplink transmission state. Further, the PHR calculation unit 112 determines, for each subframe, whether the PHR trigger condition is satisfied based on the input downlink measurement information and the states of a plurality of timers included in the PHR control information. When the PHR calculation unit 112 determines that any of the trigger conditions of the PHR is satisfied, the transmission state of the uplink physical channel in the subframe at the time of the trigger, the set report format, and the downlink measurement The PHR value calculated based on the information is input to the upper layer 111.
送信に先立ち、上位レイヤ111より制御部105へ移動局装置制御情報が入力され、送信に関する制御情報が送信制御情報として、ランダムアクセス制御部106、符号部107、変調部108、送信部109へ適切に入力される。送信制御情報は、送信信号の上りリンクスケジューリング情報として、符号化情報、変調情報、送信周波数帯域の情報、各チャネルに関する送信タイミング、多重方法、無線リソース配置情報などの情報を含む。ランダムアクセス制御情報は、上位レイヤ111からランダムアクセス制御部106へ入力される。ランダムアクセス制御情報は、プリアンブル情報や物理ランダムアクセスチャネル送信用の無線リソース情報などを含む。上位レイヤ111は、必要に応じて、上りリンク送信タイミングの調整に用いる送信タイミング調整情報と送信タイミングタイマーとを、タイミング管理部110に設定する。タイミング管理部110は、設定された情報に基づき上りリンク送信タイミングの状態(送信タイミング調整状態または送信タイミング非調整状態)を管理する。
Prior to transmission, mobile station apparatus control information is input from the upper layer 111 to the control unit 105, and control information related to transmission is appropriately transmitted to the random access control unit 106, encoding unit 107, modulation unit 108, and transmission unit 109 as transmission control information. Is input. The transmission control information includes information such as encoding information, modulation information, transmission frequency band information, transmission timing for each channel, multiplexing method, and radio resource arrangement information as uplink scheduling information of the transmission signal. The random access control information is input from the upper layer 111 to the random access control unit 106. The random access control information includes preamble information, radio resource information for physical random access channel transmission, and the like. The upper layer 111 sets transmission timing adjustment information and a transmission timing timer used for adjusting the uplink transmission timing in the timing management unit 110 as necessary. The timing management unit 110 manages the uplink transmission timing state (transmission timing adjustment state or transmission timing non-adjustment state) based on the set information.
符号部107には、上位レイヤ111より、上りリンクデータと上りリンク制御データとが入力される他、ランダムアクセス制御部106から、物理ランダムアクセスチャネルの送信に関するランダムアクセスデータ情報が入力される。符号部107は、ランダムアクセスデータ情報に基づき物理ランダムアクセスチャネルで送信されるプリアンブル系列を生成する。また、符号部107は、送信制御情報に従い各データを適切に符号化し、変調部108へ入力する。
The encoding unit 107 receives uplink data and uplink control data from the upper layer 111 and random access data information related to transmission of the physical random access channel from the random access control unit 106. The encoding unit 107 generates a preamble sequence transmitted through the physical random access channel based on the random access data information. The encoding unit 107 appropriately encodes each data according to the transmission control information and inputs the data to the modulation unit 108.
変調部108は、符号部107からの入力を変調する。送信部109は、変調部108からの入力を周波数領域にマッピングすると共に、周波数領域の信号を時間領域の信号へ変換し、既定の周波数の搬送波にのせて電力増幅を行なう。さらに、送信部109は、タイミング管理部110より入力された送信タイミング調整情報に従って、上りリンク送信タイミングを調整して送信する。上りリンク制御データが配置される物理上りリンク共用チャネルは、典型的にはレイヤ3メッセージ(無線リソース制御メッセージ;RRCメッセージ)を構成する。図5において、その他の移動局装置1の構成要素は、本実施形態に関係ないため図示していない。
The modulation unit 108 modulates the input from the coding unit 107. The transmission unit 109 maps the input from the modulation unit 108 to the frequency domain, converts the frequency domain signal into a time domain signal, and amplifies the power on a carrier wave of a predetermined frequency. Furthermore, the transmission unit 109 adjusts the uplink transmission timing according to the transmission timing adjustment information input from the timing management unit 110, and transmits. A physical uplink shared channel in which uplink control data is arranged typically constitutes a layer 3 message (radio resource control message; RRC message). In FIG. 5, other components of the mobile station apparatus 1 are not shown because they are not related to the present embodiment.
図6は、本発明の第1の実施形態に係る基地局装置2の概略構成例を示すブロック図である。本基地局装置は、受信部201、復調部202、復号部203、制御部204、符号部205、変調部206、送信部207、上位レイヤ208、および、ネットワーク信号送受信部209を含む。
FIG. 6 is a block diagram showing a schematic configuration example of the base station apparatus 2 according to the first embodiment of the present invention. The base station apparatus includes a reception unit 201, a demodulation unit 202, a decoding unit 203, a control unit 204, a coding unit 205, a modulation unit 206, a transmission unit 207, an upper layer 208, and a network signal transmission / reception unit 209.
上位レイヤ208は、下りリンクデータと下りリンク制御データとを符号部205へ入力する。符号部205は、入力されたデータを符号化し、変調部206へ入力する。変調部206は、符号化した信号の変調を行なう。また、変調部206から出力される信号は、送信部207へ入力される。送信部207は、入力された信号を周波数領域にマッピングした後、周波数領域の信号を時間領域の信号へ変換し、既定の周波数の搬送波にのせて電力増幅を行ない送信する。下りリンク制御データが配置される物理下りリンク共用チャネルは、典型的にはレイヤ3メッセージ(RRCメッセージ)を構成する。
The upper layer 208 inputs the downlink data and the downlink control data to the encoding unit 205. The encoding unit 205 encodes the input data and inputs it to the modulation unit 206. Modulation section 206 modulates the encoded signal. The signal output from the modulation unit 206 is input to the transmission unit 207. Transmitter 207 maps the input signal to the frequency domain, converts the frequency domain signal into a time domain signal, performs power amplification on a predetermined frequency carrier wave, and transmits the signal. The physical downlink shared channel in which downlink control data is arranged typically constitutes a layer 3 message (RRC message).
また、受信部201は、移動局装置1から受信した信号を、ベースバンドのデジタル信号に変換する。デジタル信号は、復調部202へ入力されて復調される。復調部202で復調された信号は、続いて復号部203へ入力されて復号され、正しく復号された上りリンク制御データや上りリンクデータは、上位レイヤ208へ入力される。これら各ブロックの制御に必要な基地局装置制御情報は、受信制御情報と送信制御情報とによって構成される、基地局装置2の無線通信制御に必要な情報であり、上位のネットワーク装置(MMEやゲートウェイ装置)やシステムパラメータにより設定され、上位レイヤ208が必要に応じて制御部204へ入力する。制御部204は、送信に関連する基地局装置制御情報を、送信制御情報として、符号部205、変調部206、送信部207の各ブロックへ適切に入力する。制御部204は、受信に関連する基地局装置制御情報を、受信制御情報として、受信部201、復調部202、復号部203の各ブロックへ適切に入力する。基地局装置2のRRCは、上位レイヤ208の一部として存在する。
Also, the receiving unit 201 converts the signal received from the mobile station device 1 into a baseband digital signal. The digital signal is input to the demodulation unit 202 and demodulated. The signal demodulated by the demodulation unit 202 is subsequently input to the decoding unit 203 and decoded, and the correctly decoded uplink control data and uplink data are input to the upper layer 208. The base station apparatus control information necessary for control of these blocks is information necessary for radio communication control of the base station apparatus 2 configured by reception control information and transmission control information. Gateway device) and system parameters, and the upper layer 208 inputs to the control unit 204 as necessary. The control unit 204 appropriately inputs base station apparatus control information related to transmission to each block of the encoding unit 205, modulation unit 206, and transmission unit 207 as transmission control information. The control unit 204 appropriately inputs base station apparatus control information related to reception to each block of the reception unit 201, the demodulation unit 202, and the decoding unit 203 as reception control information. The RRC of the base station device 2 exists as part of the upper layer 208.
一方、ネットワーク信号送受信部209は、基地局装置2間、または、上位のネットワーク装置と基地局装置2との間での、制御メッセージの送信および/または受信を行なう。図6において、その他の基地局装置2の構成要素は本実施形態に関係ないため図示していない。
Meanwhile, the network signal transmission / reception unit 209 transmits and / or receives control messages between the base station apparatuses 2 or between the host network apparatus and the base station apparatus 2. In FIG. 6, the other components of the base station apparatus 2 are not shown because they are not related to the present embodiment.
また、移動局装置1および基地局装置2が配置される通信システムのネットワーク構成は、図3に示したものと同様のものを適用できる。
Further, the network configuration of the communication system in which the mobile station device 1 and the base station device 2 are arranged can be the same as that shown in FIG.
図7を用いて、複数の送信タイミングを管理する移動局装置1がPHRを報告可能となるタイミングについて説明する。図7の横軸は、時間の経緯を示す。移動局装置1は、基地局装置2から少なくとも一つ以上の不活性化されたセカンダリセルが設定されている状態から開始される。このような状態は、典型的には、新規にセカンダリセルが追加された後の状態、または、ハンドオーバー実施後の状態とみなすことができる。さらに、当該セカンダリセルは、プライマリセルと異なる上りリンク送信タイミングを必要とする。
The timing at which the mobile station apparatus 1 that manages a plurality of transmission timings can report PHR will be described with reference to FIG. The horizontal axis of FIG. 7 shows the history of time. The mobile station device 1 is started from a state in which at least one inactivated secondary cell is set from the base station device 2. Such a state can typically be regarded as a state after a new secondary cell is added or a state after the handover is performed. Further, the secondary cell requires uplink transmission timing different from that of the primary cell.
時刻T01は、移動局装置1が不活性化のセカンダリセルに対して活性化コマンドを受信したことを示す。活性化コマンドは、従来通りMAC制御要素で通知されてもよいし、RRCメッセージや物理下りリンク制御チャネルで通知されてもよい。
Time T01 indicates that the mobile station apparatus 1 has received the activation command for the deactivated secondary cell. The activation command may be notified by a MAC control element as usual, or may be notified by an RRC message or a physical downlink control channel.
このとき、移動局装置1は、活性化したセカンダリセルの下りリンクの測定処理や、場合によっては、上りリンクにおける上りリンクリファレンスシグナルの送信などの、セカンダリセルの活性化に伴う必要な設定を適用するための処理時間が必要である。移動局装置1は、この処理時間に用いる遅延時間n1(例えば、8サブフレーム)が経過した時刻T02において、実際にセカンダリセルが活性化したとみなす。また、時刻T02は、当該セカンダリセルに対するランダムアクセス手順が開始可能となるタイミングと一致している。
At this time, the mobile station apparatus 1 applies the necessary settings accompanying the activation of the secondary cell, such as the downlink measurement processing of the activated secondary cell and, in some cases, transmission of an uplink reference signal in the uplink. Processing time is required. The mobile station apparatus 1 considers that the secondary cell is actually activated at time T02 when a delay time n1 (for example, 8 subframes) used for this processing time has elapsed. The time T02 coincides with the timing at which the random access procedure for the secondary cell can be started.
移動局装置1は、時刻T02以降のいずれかのタイミングで、セカンダリセルにおけるランダムアクセス手順を開始し、物理ランダムアクセスチャネルを基地局装置2へ送信する。典型的には、時刻T02以降で当該移動局装置1が利用可能なランダムアクセスリソースが存在する直近のサブフレームで、ランダムアクセス手順が開始される。そして、移動局装置1は、時刻T03において、基地局装置2からランダムアクセスレスポンスを受信する。ランダムアクセス手順は、当該セカンダリセルで実施される。
The mobile station apparatus 1 starts a random access procedure in the secondary cell at any timing after time T02 and transmits a physical random access channel to the base station apparatus 2. Typically, the random access procedure is started in the latest subframe in which there is a random access resource that can be used by the mobile station apparatus 1 after time T02. Then, the mobile station apparatus 1 receives a random access response from the base station apparatus 2 at time T03. The random access procedure is performed in the secondary cell.
時刻T02から時刻T03の間に、移動局装置1がセカンダリセルでランダムアクセス手順を開始するタイミングとして、例えば、(1)セカンダリセルが活性化されたタイミングと同じ、(2)セカンダリセルの活性化後にMAC制御要素でランダムアクセスの開始が指示されたとき、(3)セカンダリセルの活性化後に物理下りリンク制御チャネルPDCCHでランダムアクセスの開始が指示されたとき、などが考えられる。本実施形態では上述したタイミングのいずれかを用いてよい。
The timing at which the mobile station apparatus 1 starts the random access procedure in the secondary cell between the time T02 and the time T03 is, for example, (1) the same as the timing when the secondary cell is activated, (2) activation of the secondary cell When the start of random access is instructed later by the MAC control element, (3) when the start of random access is instructed by the physical downlink control channel PDCCH after the activation of the secondary cell, etc. are conceivable. In the present embodiment, any of the timings described above may be used.
時刻T03において、移動局装置1がランダムアクセスレスポンスを受信することで当該セカンダリセルセルの上りリンク送信タイミング(セカンダリセル上りリンク送信タイミング)を取得する。移動局装置1は、当該セカンダリセルの上りリンクの送信タイミングを調整するための処理時間として、遅延時間n2が必要である。移動局装置1は、この遅延時間n2(例えば、4サブフレーム)が経過した時刻T04以降に、当該セカンダリセルのパワーヘッドルーム報告が可能(PHR送信可能)であると判断する。
At time T03, the mobile station apparatus 1 receives the random access response to acquire the uplink transmission timing (secondary cell uplink transmission timing) of the secondary cell cell. The mobile station device 1 needs a delay time n2 as a processing time for adjusting the uplink transmission timing of the secondary cell. The mobile station apparatus 1 determines that the power headroom report of the secondary cell is possible (PHR transmission is possible) after time T04 when the delay time n2 (for example, 4 subframes) has elapsed.
そして、移動局装置1は、PHRのトリガ条件が満たされた場合と同様の手順を開始し、プライマリセルと送信タイミング調整状態および活性化しているセカンダリセルとのPHRを、MAC制御要素に含めて基地局装置2へ送信する。
And the mobile station apparatus 1 starts the procedure similar to the case where the trigger conditions of PHR are satisfy | filled, and includes PHR of a primary cell, a transmission timing adjustment state, and the activated secondary cell in a MAC control element. Transmit to the base station apparatus 2.
すなわち、本実施形態の移動局装置1は、従来のEUTRAのPHRのトリガ条件に代えて、PHRのトリガ条件として、(1)PHR報告禁止タイマー(Prohibit PHR timer)が停止しているときであって、プライマリセル、または、送信タイミング調整状態および活性化しているセカンダリセルの、パスロス値が前回PHRを報告したときよりも所定の値以上劣化したとき、(2)PHR周期タイマー(Periodic PHR timer)が満了したとき、(3)PHRの設定が変更されたとき、(4)セカンダリセルを活性化して送信タイミング調整状態となったとき、を使用する。移動局装置1は、上述したPHRのトリガ条件のいずれかが満たされた場合に、プライマリセルと送信タイミング調整状態の活性化しているセカンダリセルとのPHRを、基地局装置2へ送信する。
That is, the mobile station apparatus 1 of the present embodiment is when (1) the PHR report prohibition timer (Prohibit PHR timer) is stopped as a PHR trigger condition instead of the conventional EUTRA PHR trigger condition. (2) PHR period timer (Periodic PHR timer) when the path loss value of the primary cell or the transmission timing adjustment state and the activated secondary cell has deteriorated by more than a predetermined value than when the previous PHR was reported Is used, (3) when the PHR setting is changed, and (4) when the secondary cell is activated to enter the transmission timing adjustment state. The mobile station apparatus 1 transmits the PHR between the primary cell and the activated secondary cell in the transmission timing adjustment state to the base station apparatus 2 when any of the above-described PHR trigger conditions is satisfied.
図8は、本実施形態に係る移動局装置1と基地局装置2とのセカンダリセルの活性化に伴うパワーヘッドルーム報告に関するシグナリングのやり取りを示したシーケンスチャートである。移動局装置1は、基地局装置2から少なくとも一つ以上の不活性化されたセカンダリセルが設定されている状態から開始される。さらに、当該セカンダリセルは、プライマリセルと異なる上りリンク送信タイミングが設定されている。
FIG. 8 is a sequence chart showing the exchange of signaling related to the power headroom report accompanying the activation of the secondary cell between the mobile station apparatus 1 and the base station apparatus 2 according to the present embodiment. The mobile station device 1 is started from a state in which at least one inactivated secondary cell is set from the base station device 2. Furthermore, the uplink transmission timing different from the primary cell is set for the secondary cell.
ここで、ステップS101において、送信タイミング非調整状態のセカンダリセルに対する活性化コマンドが、基地局装置2より通知される。活性化コマンドは、従来通りMAC制御要素で通知されてもよいし、RRCメッセージや物理下りリンク制御チャネルで通知されてもよい。
Here, in step S101, an activation command for the secondary cell in the transmission timing non-adjusted state is notified from the base station apparatus 2. The activation command may be notified by a MAC control element as usual, or may be notified by an RRC message or a physical downlink control channel.
移動局装置1は、活性化したセカンダリセルに対して、ランダムアクセス手順を開始するか否かのランダムアクセストリガの判定を行なう(ステップS102)。移動局装置1がセカンダリセルでランダムアクセス手順を開始するタイミングとして、例えば、(1)セカンダリセルが活性化されたタイミングと同じ、(2)セカンダリセルの活性化後にMAC制御要素でランダムアクセス手順の開始が指示されたとき、(3)セカンダリセルの活性化後に物理下りリンク制御チャネルPDCCHでランダムアクセス手順の開始が指示されたとき、(4)セカンダリセルの活性化後にレイヤ3メッセージ(RRCメッセージ)でランダムアクセス手順の開始が指示されたとき、などが考えられる。本実施形態では上述したタイミングのいずれかを用いてよい。
The mobile station apparatus 1 determines a random access trigger as to whether or not to start the random access procedure for the activated secondary cell (step S102). The timing when the mobile station device 1 starts the random access procedure in the secondary cell is, for example, (1) the same as the timing when the secondary cell is activated, or (2) the random access procedure is performed by the MAC control element after the activation of the secondary cell. When the start is instructed, (3) When the start of the random access procedure is instructed on the physical downlink control channel PDCCH after the activation of the secondary cell, (4) The layer 3 message (RRC message) after the activation of the secondary cell Or when the start of a random access procedure is instructed. In the present embodiment, any of the timings described above may be used.
移動局装置1は、ステップS103にて、ランダムアクセス手順を送信タイミング非調整状態のセカンダリセルに対して開始し、基地局装置2に対して物理ランダムアクセスチャネルを送信する。基地局装置2は、物理ランダムアクセスチャネルを受信すると、ステップS104にてランダムアクセスレスポンスを当該移動局装置1に対して送信する。ステップS103およびステップS104の詳細は、図1または図2と同じでよい。
In step S103, the mobile station apparatus 1 starts a random access procedure for the secondary cell in the transmission timing non-adjusted state, and transmits a physical random access channel to the base station apparatus 2. When receiving the physical random access channel, the base station apparatus 2 transmits a random access response to the mobile station apparatus 1 in step S104. The details of step S103 and step S104 may be the same as in FIG. 1 or FIG.
そして、移動局装置1は、セカンダリセル上りリンク送信タイミング取得(ステップS105)を行ない、ステップS104のランダムアクセスレスポンスより、上りリンクの送信タイミング調整情報を取得する。上りリンク送信タイミングは、送信タイミング調整情報を取得してから所定の時間後(例えば、4サブフレーム後)に調整される。移動局装置1は、新たに活性化された当該セカンダリセルの上りリンクの状態が送信タイミング調整状態となった場合に、PHRのトリガ条件が満たされたと判定し、物理層から通知されたPHRをMAC制御情報に設定してパワーヘッドルーム報告を行なう(ステップS106)。
Then, the mobile station apparatus 1 performs secondary cell uplink transmission timing acquisition (step S105), and acquires uplink transmission timing adjustment information from the random access response in step S104. The uplink transmission timing is adjusted after a predetermined time (for example, after 4 subframes) after acquiring the transmission timing adjustment information. When the uplink state of the newly activated secondary cell becomes the transmission timing adjustment state, the mobile station device 1 determines that the PHR trigger condition is satisfied, and determines the PHR notified from the physical layer. A power headroom report is made by setting the MAC control information (step S106).
図9は、本実施形態に係る移動局装置1のセカンダリセルの活性化に伴うパワーヘッドルーム報告に関するフローチャートである。本フローチャートは、移動局装置1に対して送信タイミング非調整状態のセカンダリセルが少なくとも一つ設定されており、当該セカンダリセルに対する活性化コマンドを受信したときに開始される。
FIG. 9 is a flowchart regarding power headroom reporting accompanying activation of the secondary cell of the mobile station apparatus 1 according to the present embodiment. This flowchart is started when at least one secondary cell in the transmission timing non-adjusted state is set for the mobile station apparatus 1 and an activation command for the secondary cell is received.
まず、移動局装置1は、セカンダリセルに対して、ランダムアクセス手順がトリガされたか否かを監視する(ステップS201)。移動局装置1がセカンダリセルでランダムアクセス手順を開始するタイミングとして、例えば、(1)セカンダリセルが活性化されたタイミングと同じ、(2)セカンダリセルの活性化後にMAC制御要素でランダムアクセスの開始が指示されたとき、(3)セカンダリセルの活性化後に物理下りリンク制御チャネルPDCCHでランダムアクセスの開始が指示されたとき、(4)セカンダリセルの活性化後にレイヤ3メッセージ(RRCメッセージ)でランダムアクセスの開始が指示されたとき、などが考えられる。本実施形態では上述したタイミングのいずれかを用いてよい。
First, the mobile station apparatus 1 monitors whether or not a random access procedure is triggered for the secondary cell (step S201). The timing when the mobile station device 1 starts the random access procedure in the secondary cell is, for example, (1) the same as the timing when the secondary cell is activated, (2) the random access is started by the MAC control element after the secondary cell is activated (3) When the start of random access is instructed on the physical downlink control channel PDCCH after activation of the secondary cell, (4) Random in layer 3 message (RRC message) after activation of the secondary cell When the start of access is instructed, etc. In the present embodiment, any of the timings described above may be used.
移動局装置1は、セカンダリセルのランダムアクセス手順が開始された場合はステップS202へと進み、それ以外はステップS201へと戻り、トリガされるのを引き続き監視する。
The mobile station apparatus 1 proceeds to step S202 when the secondary cell random access procedure is started, otherwise returns to step S201 and continuously monitors the trigger.
移動局装置1は、ステップS202で、ランダムアクセス手順を開始する。そして、移動局装置1は、ランダムアクセス手順の実施と並行してパワーヘッドルームが報告可能となるタイミングを監視し、パワーヘッドルームが報告可能であるか否かの判定を毎サブフレーム行なう(ステップS203)。移動局装置1は、上述したように、ランダムアクセス手順によって活性化されたセカンダリセルの上りリンクの状態が送信タイミング調整状態となったときに、パワーヘッドルームが報告可能であると判定する。換言すれば、移動局装置1は、活性化されたセカンダリセルの送信タイミング調整情報を受信してから所定の時間が経過した後にパワーヘッドルームが報告可能であると判定する。
The mobile station apparatus 1 starts a random access procedure in step S202. Then, the mobile station apparatus 1 monitors the timing at which the power headroom can be reported in parallel with the execution of the random access procedure, and determines whether or not the power headroom can be reported every subframe (step) S203). As described above, the mobile station apparatus 1 determines that the power headroom can be reported when the uplink state of the secondary cell activated by the random access procedure becomes the transmission timing adjustment state. In other words, the mobile station apparatus 1 determines that the power headroom can be reported after a predetermined time has elapsed after receiving the transmission timing adjustment information of the activated secondary cell.
そして、移動局装置1は、物理層から通知されたプライマリセルのPHR、および活性化かつ送信タイミング調整状態のセカンダリセルのPHRを、MAC制御情報に含めてパワーヘッドルーム報告を行なう(ステップS204)。
Then, the mobile station apparatus 1 reports the power headroom by including the PHR of the primary cell notified from the physical layer and the PHR of the activated secondary cell in the transmission timing adjustment state in the MAC control information (step S204). .
なお、図7から図9に適用されるランダムアクセス手順は、Contention based Random Access(競合ベースランダムアクセス)手順とNon-contention based Random Access(非競合ベースランダムアクセス)手順とのどちらであってもよい。すなわち、どちらのランダムアクセス手順を開始した場合であっても、新たに活性化されたセカンダリセルの送信タイミング調整情報がランダムアクセスレスポンスで基地局装置2から移動局装置1へ通知され、移動局装置1は、活性化されたセカンダリセルの上りリンク送信タイミングを送信タイミング調整情報に基づいて調整した後に、PHRを送信するという点は同じである。
The random access procedure applied to FIGS. 7 to 9 may be either a contention based random access (contention based random access) procedure or a non-contention based random access (non-contention based random access) procedure. . That is, regardless of which random access procedure is started, transmission timing adjustment information of the newly activated secondary cell is notified from the base station apparatus 2 to the mobile station apparatus 1 by a random access response, and the mobile station apparatus 1 is the same in that the PHR is transmitted after adjusting the uplink transmission timing of the activated secondary cell based on the transmission timing adjustment information.
なお、移動局装置1は、活性化されたセカンダリセルがプライマリセルと同じ上りリンク送信タイミングであった場合、活性化されたセカンダリセルが上りリンク送信タイミングが調整済み(送信タイミング調整状態)である場合、または、活性化されたセカンダリセルに上りリンクが設定されていない場合は、従来のPHR報告のトリガ条件を適用する。
In addition, when the activated secondary cell has the same uplink transmission timing as that of the primary cell, the mobile station device 1 has the uplink transmission timing adjusted for the activated secondary cell (transmission timing adjustment state). If the uplink is not set in the activated secondary cell, the conventional PHR report trigger condition is applied.
さらに、PHRの報告形式は、タイプ1とタイプ2とのどちらであってもよく、そのいずれであっても本発明の趣旨には影響しない。
Furthermore, the PHR reporting format may be either type 1 or type 2, and any of them does not affect the spirit of the present invention.
このように、第1の実施形態によれば、上りリンク送信タイミングが非調整である上りリンク周波数(上りリンクコンポーネントキャリア)を持つセル(セカンダリセル)が移動局装置1に設定されている場合に、基地局装置2は、当該セカンダリセルを活性化させることで、移動局装置1に、当該セカンダリセルの上りリンク送信タイミングを調整させた後に関連するセルのパワーヘッドルームを報告させる。また、移動局装置1は、上りリンク送信タイミングが非調整のセカンダリセルが活性化されたときに、ランダムアクセス手順を開始し、当該セカンダリセルの上りリンク送信タイミングを調整した後にパワーヘッドルームを基地局装置2へ送信する。
Thus, according to the first embodiment, when a cell (secondary cell) having an uplink frequency (uplink component carrier) whose uplink transmission timing is not adjusted is set in the mobile station apparatus 1. The base station apparatus 2 activates the secondary cell to cause the mobile station apparatus 1 to report the power headroom of the related cell after adjusting the uplink transmission timing of the secondary cell. In addition, when a secondary cell whose uplink transmission timing is not adjusted is activated, the mobile station apparatus 1 starts a random access procedure, adjusts the uplink transmission timing of the secondary cell, and then sets the power headroom as a base. Transmit to the station apparatus 2.
以上のように、第1の実施形態のように構成することによって、移動局装置1が基地局装置2に対してスケジューリングできないコンポーネントキャリア(すなわち、不活性化されたセカンダリセル)のPHRを報告してしまうという従来のEUTRAの問題を解決することができる。
As described above, by configuring as in the first embodiment, the mobile station apparatus 1 reports the PHR of the component carrier (that is, the deactivated secondary cell) that cannot be scheduled to the base station apparatus 2. It is possible to solve the problem of conventional EUTRA.
本実施形態の移動局装置1は、ランダムアクセス手順を開始して送信タイミングが調整された後にパワーヘッドルームを報告する。移動局装置1は、パワーヘッドルームの報告に用いられるL2メッセージを拡張することなく再利用することができる。このように、移動局装置1は、ランダムアクセス手順によって送信タイミング調整状態となった後で活性化しているセル(コンポーネントキャリア)のパワーヘッドルームを報告するため、無駄なシグナリングを削減することが可能となる。
The mobile station apparatus 1 according to the present embodiment reports the power headroom after starting the random access procedure and adjusting the transmission timing. The mobile station apparatus 1 can be reused without extending the L2 message used for power headroom reporting. As described above, since the mobile station apparatus 1 reports the power headroom of the cell (component carrier) activated after the transmission timing adjustment state is established by the random access procedure, it is possible to reduce useless signaling. It becomes.
また、本実施形態の基地局装置2は、移動局装置1が報告したパワーヘッドルームがスケジューリング可能なコンポーネントキャリアであることを知っているため、パワーヘッドルーム報告に基づいてセカンダリセルの変調方式やリソース割り当てを効率的に行なうことができる。このように、基地局装置2は報告されたパワーヘッドルームに基づいて適切なスケジューリングを行なうことが可能となる。
Further, since the base station apparatus 2 of the present embodiment knows that the power headroom reported by the mobile station apparatus 1 is a schedulable component carrier, the secondary cell modulation scheme and the Resource allocation can be performed efficiently. Thus, the base station apparatus 2 can perform appropriate scheduling based on the reported power headroom.
[第2の実施形態]
本発明の第2の実施形態について以下に説明する。本実施形態は、ランダムアクセス手順が成功してからパワーヘッドルームを報告するパワーヘッドルーム報告方法について説明する。本実施形態に用いる移動局装置1および基地局装置2の構成は、それぞれ図5および図6と同じ構成でよいため説明を繰り返さない。 [Second Embodiment]
A second embodiment of the present invention will be described below. In the present embodiment, a power headroom reporting method for reporting power headroom after a random access procedure is successful will be described. The configurations ofmobile station apparatus 1 and base station apparatus 2 used in the present embodiment may be the same as those shown in FIGS.
本発明の第2の実施形態について以下に説明する。本実施形態は、ランダムアクセス手順が成功してからパワーヘッドルームを報告するパワーヘッドルーム報告方法について説明する。本実施形態に用いる移動局装置1および基地局装置2の構成は、それぞれ図5および図6と同じ構成でよいため説明を繰り返さない。 [Second Embodiment]
A second embodiment of the present invention will be described below. In the present embodiment, a power headroom reporting method for reporting power headroom after a random access procedure is successful will be described. The configurations of
また、移動局装置1および基地局装置2が配置される通信システムのネットワーク構成は、図3に示したものと同様のものを適用できる。
Further, the network configuration of the communication system in which the mobile station device 1 and the base station device 2 are arranged can be the same as that shown in FIG.
図10を用いて、複数の送信タイミングを管理する移動局装置1がPHRを報告可能となるタイミングについて説明する。図10の横軸は、時間の経緯を示す。移動局装置1は、基地局装置2から少なくとも一つ以上の不活性化されたセカンダリセルが設定されている状態から開始される。このような状態は、典型的には、新規にセカンダリセルが追加された後の状態、または、ハンドオーバー実施後の状態とみなすことができる。さらに、当該セカンダリセルは、プライマリセルと異なる上りリンク送信タイミングを必要とする。
The timing at which the mobile station apparatus 1 that manages a plurality of transmission timings can report PHR will be described with reference to FIG. The horizontal axis of FIG. 10 shows the history of time. The mobile station device 1 is started from a state in which at least one inactivated secondary cell is set from the base station device 2. Such a state can typically be regarded as a state after a new secondary cell is added or a state after the handover is performed. Further, the secondary cell requires uplink transmission timing different from that of the primary cell.
図10における時刻T01から時刻T04までの一連の処理は、図7と同じであるため、同じ符号を配置してその詳細な説明は繰り返さず、主に時刻T04以降の動作の説明を行なう。
The series of processing from time T01 to time T04 in FIG. 10 is the same as that in FIG.
移動局装置1は、セカンダリセルの上りリンクの送信タイミングを調整するための処理時間として遅延時間n2(例えば、4サブフレーム)が経過した時刻T04以降、必要であれば、実行中のランダムアクセス手順を継続する。そして、移動局装置1は、ランダムアクセス手順が成功した時刻T05以降に、当該セカンダリセルのパワーヘッドルーム報告が可能(PHR送信可能)であると判断する。
The mobile station apparatus 1 performs the random access procedure being executed if necessary after time T04 when a delay time n2 (for example, 4 subframes) has elapsed as a processing time for adjusting the uplink transmission timing of the secondary cell. Continue. And the mobile station apparatus 1 judges that the power headroom report of the said secondary cell is possible (PHR transmission is possible) after the time T05 when the random access procedure was successful.
そして、移動局装置1は、PHRのトリガ条件が満たされた場合と同様の手順を開始し、プライマリセルと送信タイミング調整状態および活性化しているセカンダリセルとのPHRを、MAC制御要素に含めて基地局装置2へ送信する。
And the mobile station apparatus 1 starts the procedure similar to the case where the trigger conditions of PHR are satisfy | filled, and includes PHR of a primary cell, a transmission timing adjustment state, and the activated secondary cell in a MAC control element. Transmit to the base station apparatus 2.
すなわち、本実施形態の移動局装置1は、従来のEUTRAのPHRのトリガ条件に代えて、PHRのトリガ条件として、(1)PHR報告禁止タイマー(Prohibit PHR timer)が停止しているときであって、プライマリセル、または、送信タイミング調整状態および活性化しているセカンダリセルの、パスロス値が前回PHRを報告したときよりも所定の値以上劣化したとき、(2)PHR周期タイマー(Periodic PHR timer)が満了したとき、(3)PHRの設定が変更されたとき、(4)セカンダリセルのランダムアクセス手順が成功したとき、を使用する。移動局装置1は、上述したPHRのトリガ条件のいずれかが満たされた場合に、プライマリセルと送信タイミング調整状態の活性化しているセカンダリセルとのPHRを、基地局装置2へ送信する。
That is, the mobile station apparatus 1 of the present embodiment is when (1) the PHR report prohibition timer (Prohibit PHR timer) is stopped as a PHR trigger condition instead of the conventional EUTRA PHR trigger condition. (2) PHR period timer (Periodic PHR timer) when the path loss value of the primary cell or the transmission timing adjustment state and the activated secondary cell has deteriorated by more than a predetermined value than when the previous PHR was reported Is used, (3) when the PHR setting is changed, and (4) when the secondary cell random access procedure is successful. The mobile station apparatus 1 transmits the PHR between the primary cell and the activated secondary cell in the transmission timing adjustment state to the base station apparatus 2 when any of the above-described PHR trigger conditions is satisfied.
図11および図12は、本実施形態に係る移動局装置1と基地局装置2とのセカンダリセルの活性化に伴うパワーヘッドルーム報告に関するシグナリングのやり取りを示したシーケンスチャートである。図11は、Contention based Random Access手順を行った場合の例を示し、図12は、Non-contention based Random Access手順を行った場合の例を示す。
FIG. 11 and FIG. 12 are sequence charts showing the exchange of signaling related to the power headroom report accompanying the activation of the secondary cell between the mobile station apparatus 1 and the base station apparatus 2 according to the present embodiment. FIG. 11 shows an example when the contention based random access procedure is performed, and FIG. 12 shows an example when the non-contention based random access procedure is performed.
図11において、移動局装置1は、基地局装置2から少なくとも一つ以上の不活性化されたセカンダリセルが設定されている状態から開始される。さらに、当該セカンダリセルは、プライマリセルと異なる上りリンク送信タイミングが設定されている。
In FIG. 11, the mobile station device 1 starts from a state in which at least one inactivated secondary cell is set from the base station device 2. Furthermore, the uplink transmission timing different from the primary cell is set for the secondary cell.
ここで、ステップS301において、送信タイミング非調整状態のセカンダリセルに対する活性化コマンドが、基地局装置2より通知される。活性化コマンドは、従来通りMAC制御要素で通知されてもよいし、RRCメッセージや物理下りリンク制御チャネルで通知されてもよい。
Here, in step S301, an activation command for the secondary cell in the transmission timing non-adjusted state is notified from the base station apparatus 2. The activation command may be notified by a MAC control element as usual, or may be notified by an RRC message or a physical downlink control channel.
移動局装置1は、活性化したセカンダリセルに対して、ランダムアクセス手順を開始するか否かのランダムアクセストリガの判定を行なう(ステップS302)。移動局装置1がセカンダリセルでランダムアクセス手順を開始するタイミングは、図8におけるステップS102で説明したものと同様でよいため、その詳細な説明は繰り返さない。ただし、基地局装置2は、移動局装置1に対して個別プリアンブルを通知せず、移動局装置1は、ランダムアクセス手順としてContention based Random Access手順を開始する。
The mobile station apparatus 1 determines a random access trigger as to whether or not to start a random access procedure for the activated secondary cell (step S302). The timing at which the mobile station apparatus 1 starts the random access procedure in the secondary cell may be the same as that described in step S102 in FIG. 8, and therefore detailed description thereof will not be repeated. However, the base station apparatus 2 does not notify the mobile station apparatus 1 of the individual preamble, and the mobile station apparatus 1 starts the Contention based Random Access procedure as a random access procedure.
移動局装置1は、ステップS303にて、Contention based Random Access手順を送信タイミング非調整状態のセカンダリセルに対して開始し、基地局装置2に対して物理ランダムアクセスチャネルを送信する。基地局装置2は、物理ランダムアクセスチャネルを受信すると、ステップS304にてランダムアクセスレスポンスを当該移動局装置1に対して送信する。ステップS303およびステップS304の詳細は、図1と同じでよい。
In step S303, the mobile station apparatus 1 starts the contention based random access procedure for the secondary cell in the transmission timing non-adjusted state, and transmits the physical random access channel to the base station apparatus 2. When receiving the physical random access channel, the base station apparatus 2 transmits a random access response to the mobile station apparatus 1 in step S304. The details of step S303 and step S304 may be the same as in FIG.
そして、移動局装置1は、セカンダリセル上りリンク送信タイミング取得(ステップS305)を行ない、ステップS304のランダムアクセスレスポンスより、上りリンクの送信タイミング調整情報を取得する。上りリンク送信タイミングは、送信タイミング調整情報を取得してから所定の時間後(例えば、4サブフレーム後)に調整される。移動局装置1は、新たに活性化された当該セカンダリセルの上りリンクの状態を送信タイミング調整状態とみなし、上位レイヤメッセージを基地局装置2へ送信する(ステップS306)。そして、基地局装置2は、移動局装置1に衝突確認メッセージ(コンテンションレゾリューション;Contention resolution)を送信する(ステップS307)。ステップS306およびステップS307の詳細は、図1と同じでよい。
Then, the mobile station apparatus 1 performs secondary cell uplink transmission timing acquisition (step S305), and acquires uplink transmission timing adjustment information from the random access response in step S304. The uplink transmission timing is adjusted after a predetermined time (for example, after 4 subframes) after acquiring the transmission timing adjustment information. The mobile station apparatus 1 regards the uplink state of the newly activated secondary cell as a transmission timing adjustment state, and transmits an upper layer message to the base station apparatus 2 (step S306). Then, the base station device 2 transmits a collision confirmation message (contention resolution) to the mobile station device 1 (step S307). The details of step S306 and step S307 may be the same as in FIG.
移動局装置1は、ステップS307で受信したコンテンションレゾリューションを解析し、ステップS306で送信した上位レイヤメッセージに対する応答であるかを確認する。そして、当該上位レイヤメッセージに対する応答であることを確認した場合、移動局装置1は、Contention based Random Access手順が成功したと判断する(ステップS308)。移動局装置1は、Contention based Random Access手順が成功した場合、PHRのトリガ条件が満たされたと判定し、物理層から通知されたPHRをMAC制御情報に設定してパワーヘッドルーム報告を行なう(ステップS309)。
The mobile station apparatus 1 analyzes the contention resolution received in step S307 and confirms whether it is a response to the upper layer message transmitted in step S306. When confirming that the response is to the upper layer message, the mobile station apparatus 1 determines that the contention based random access procedure has been successful (step S308). When the contention based random access procedure is successful, the mobile station apparatus 1 determines that the PHR trigger condition is satisfied, sets the PHR notified from the physical layer in the MAC control information, and performs power headroom reporting (steps). S309).
一方、図12において、移動局装置1は、基地局装置2から少なくとも一つ以上の不活性化されたセカンダリセルが設定されている状態から開始される。さらに、当該セカンダリセルは、プライマリセルと異なる上りリンク送信タイミングを必要とする。
On the other hand, in FIG. 12, the mobile station apparatus 1 starts from a state in which at least one inactivated secondary cell is set from the base station apparatus 2. Further, the secondary cell requires uplink transmission timing different from that of the primary cell.
ここで、ステップS401において、送信タイミング非調整状態のセカンダリセルに対する活性化コマンドが、基地局装置2より通知される。活性化コマンドは、従来通りMAC制御要素で通知されてもよいし、RRCメッセージや物理下りリンク制御チャネルで通知されてもよい。
Here, in step S401, an activation command for the secondary cell in the transmission timing non-adjusted state is notified from the base station apparatus 2. The activation command may be notified by a MAC control element as usual, or may be notified by an RRC message or a physical downlink control channel.
移動局装置1は、活性化したセカンダリセルに対して、ランダムアクセス手順を開始するか否かのランダムアクセストリガの判定を行なう(ステップS402)。移動局装置1がセカンダリセルでランダムアクセス手順を開始するタイミングは、図8におけるステップS102で説明したものと同様でよいため、その詳細な説明は繰り返さない。ただし、基地局装置2は、移動局装置1に対して個別プリアンブルを通知し、移動局装置1は、ランダムアクセス手順としてNon-contention based Random Access手順を開始する。基地局装置2が移動局装置1に対して個別プリアンブルを通知する方法は、PDCCHに含めて通知する方法、MAC制御要素で通知する方法、RRCメッセージで通知する方法のうち、いずれかまたは複数を用いることができる。
The mobile station apparatus 1 determines a random access trigger as to whether or not to start a random access procedure for the activated secondary cell (step S402). The timing at which the mobile station apparatus 1 starts the random access procedure in the secondary cell may be the same as that described in step S102 in FIG. 8, and therefore detailed description thereof will not be repeated. However, the base station apparatus 2 notifies the mobile station apparatus 1 of an individual preamble, and the mobile station apparatus 1 starts a non-contention based random access procedure as a random access procedure. The method in which the base station apparatus 2 notifies the mobile station apparatus 1 of the dedicated preamble is one or more of a method in which the dedicated preamble is included in the PDCCH, a method in which the MAC control element notifies, and a method in which the RRC message notifies. Can be used.
移動局装置1は、ステップS403にて、Non-contention based Random Access手順を送信タイミング非調整状態のセカンダリセルに対して開始し、基地局装置2に対して物理ランダムアクセスチャネルを送信する。基地局装置2は、物理ランダムアクセスチャネルを受信すると、ステップS404にてランダムアクセスレスポンスを当該移動局装置1に対して送信する。ステップS403およびステップS404の詳細は、図2と同じでよい。
In step S403, the mobile station apparatus 1 starts a non-contention based random access procedure for the secondary cell in the transmission timing non-adjusted state, and transmits a physical random access channel to the base station apparatus 2. When receiving the physical random access channel, the base station apparatus 2 transmits a random access response to the mobile station apparatus 1 in step S404. The details of step S403 and step S404 may be the same as in FIG.
そして、移動局装置1は、セカンダリセル上りリンク送信タイミング取得(ステップS405)を行ない、ステップS404のランダムアクセスレスポンスより、上りリンクの送信タイミング調整情報を取得する。上りリンク送信タイミングは、送信タイミング調整情報を取得してから所定の時間後(例えば、4サブフレーム後)に調整される。移動局装置1は、新たに活性化された当該セカンダリセルの上りリンクの状態を送信タイミング調整状態とみなす。
Then, the mobile station apparatus 1 performs secondary cell uplink transmission timing acquisition (step S405), and acquires uplink transmission timing adjustment information from the random access response of step S404. The uplink transmission timing is adjusted after a predetermined time (for example, after 4 subframes) after acquiring the transmission timing adjustment information. The mobile station apparatus 1 regards the uplink state of the newly activated secondary cell as the transmission timing adjustment state.
移動局装置1は、ステップS405の処理と並行して、ステップS404でランダムアクセスレスポンスを受信したことで、Non-contention based Random Access手順が成功したと判断する(ステップS406)。移動局装置1は、Non-contention based Random Access手順が成功した場合、PHRのトリガ条件が満たされたと判定し、物理層から通知されたPHRをMAC制御情報に設定してパワーヘッドルーム報告を行なう(ステップS407)。
The mobile station apparatus 1 determines that the Non-contention based Random Access procedure has been successful by receiving the random access response in Step S404 in parallel with the processing in Step S405 (Step S406). When the non-contention based Random Access procedure is successful, the mobile station apparatus 1 determines that the PHR trigger condition is satisfied, sets the PHR notified from the physical layer in the MAC control information, and performs power headroom reporting (Step S407).
本実施形態に係る移動局装置1のセカンダリセルの活性化に伴うパワーヘッドルーム報告に関するフローチャートは、図9と同じフローチャートを用いて説明することができる。ただし、図9のステップS203において、移動局装置1は、パワーヘッドルームが報告可能であるか否かの判定に、活性化されたセカンダリセルで実行したランダムアクセス手順が成功したときに、パワーヘッドルームが報告可能であると判定する。換言すれば、移動局装置1は、Contention based Random Access手順であれば自局宛のコンテンションレゾリューションを受信したとき、Non-contention based Random Access手順であればランダムアクセスレスポンスの受信に成功したときに、当該ランダムアクセスを実施したセカンダリセルのパワーヘッドルームが報告可能であると判定する。
The flowchart regarding the power headroom report accompanying the activation of the secondary cell of the mobile station apparatus 1 according to the present embodiment can be described using the same flowchart as FIG. However, in step S203 of FIG. 9, the mobile station apparatus 1 determines that the power headroom can be reported, and when the random access procedure executed in the activated secondary cell succeeds, Determine that the room is reportable. In other words, when the mobile station apparatus 1 receives a contention resolution addressed to itself if it is a Contention based Random Access procedure, it receives a random access response if it is a Non-contention based Random Access procedure. Sometimes, it is determined that the power headroom of the secondary cell that has performed the random access can be reported.
なお、移動局装置1は、活性化されたセカンダリセルがプライマリセルと同じ上りリンク送信タイミングであった場合や、活性化されたセカンダリセルが上りリンク送信タイミングが調整済み(送信タイミング調整状態)である場合、または、活性化されたセカンダリセルに上りリンクが設定されていない場合は、従来のPHR報告のトリガ条件を適用する。
In addition, the mobile station apparatus 1 is the case where the activated secondary cell has the same uplink transmission timing as the primary cell, or the activated secondary cell has the uplink transmission timing adjusted (transmission timing adjustment state). In some cases, or when an uplink is not set in the activated secondary cell, a conventional trigger condition for PHR reporting is applied.
さらに、PHRの報告形式は、タイプ1とタイプ2とのどちらであってもよく、そのいずれであっても本発明の趣旨には影響しない。
Furthermore, the PHR reporting format may be either type 1 or type 2, and any of them does not affect the spirit of the present invention.
このように、第2の実施形態によれば、上りリンク送信タイミングが非調整である上りリンク周波数(上りリンクコンポーネントキャリア)を持つセル(セカンダリセル)が移動局装置1に設定されている場合に、基地局装置2は、当該セカンダリセルを活性化させることで、移動局装置1に、当該セカンダリセルにおけるランダムアクセス手順が成功した後に関連するセルのパワーヘッドルームを報告させる。また、移動局装置1は、上りリンク送信タイミングが非調整のセカンダリセルが活性化されたときに、ランダムアクセス手順を開始し、当該ランダムアクセス手順が成功した後にパワーヘッドルームを基地局装置2へ送信する。
As described above, according to the second embodiment, when a cell (secondary cell) having an uplink frequency (uplink component carrier) whose uplink transmission timing is not adjusted is set in the mobile station apparatus 1. The base station apparatus 2 activates the secondary cell to cause the mobile station apparatus 1 to report the power headroom of the related cell after the random access procedure in the secondary cell is successful. Moreover, when the secondary cell whose uplink transmission timing is not adjusted is activated, the mobile station apparatus 1 starts a random access procedure, and after the random access procedure is successful, the mobile station apparatus 1 transfers the power headroom to the base station apparatus 2. Send.
以上のように、第2の実施形態のように構成することによって、移動局装置1が基地局装置2に対してスケジューリングできないコンポーネントキャリア(すなわち、不活性化されたセカンダリセル)のPHRを報告してしまうという従来のEUTRAの問題を解決することができる。
As described above, by configuring as in the second embodiment, the mobile station apparatus 1 reports the PHR of the component carrier (that is, the deactivated secondary cell) that cannot be scheduled to the base station apparatus 2. It is possible to solve the problem of conventional EUTRA.
特に、第2の実施形態ではランダムアクセス手順が成功したことを確認してからパワーヘッドルームが報告されるため、送信タイミングの調整後にランダムアクセス手順が失敗した場合(特に、Contention based Random Access手順で発生する可能性がある)を考慮した効率的なパワーヘッドルームの報告を行なうことが可能となる。換言すれば、移動局装置1は、セカンダリセルが基地局装置2でスケジューリング可能となってからパワーヘッドルームを報告するため、無駄なシグナリングを削減することが可能となる。
In particular, in the second embodiment, since the power headroom is reported after confirming that the random access procedure is successful, if the random access procedure fails after adjusting the transmission timing (particularly, in the Contention based Random Access procedure). It is possible to report the power headroom efficiently in consideration of (which may occur). In other words, since the mobile station apparatus 1 reports the power headroom after the secondary cell can be scheduled by the base station apparatus 2, it is possible to reduce useless signaling.
本実施形態の移動局装置1は、ランダムアクセス手順が成功した後にパワーヘッドルームを報告する。移動局装置1は、パワーヘッドルームの報告に用いられるL2メッセージを拡張することなく再利用することができる。このように、移動局装置1は、ランダムアクセス手順が成功した後で活性化しているセル(コンポーネントキャリア)のパワーヘッドルームを報告するため、無駄なシグナリングを削減することが可能となる。
The mobile station apparatus 1 of the present embodiment reports the power headroom after the random access procedure is successful. The mobile station apparatus 1 can be reused without extending the L2 message used for power headroom reporting. Thus, since the mobile station apparatus 1 reports the power headroom of the cell (component carrier) activated after the random access procedure is successful, it is possible to reduce useless signaling.
また、本実施形態の基地局装置2は、移動局装置1が報告したパワーヘッドルームがスケジューリング可能なコンポーネントキャリアであることを知っているため、パワーヘッドルーム報告に基づいてセカンダリセルの変調方式やリソース割り当てを効率的に行なうことができる。このように、基地局装置2は、報告されたパワーヘッドルームに基づいて適切なスケジューリングを行なうことが可能となる。
Further, since the base station apparatus 2 of the present embodiment knows that the power headroom reported by the mobile station apparatus 1 is a schedulable component carrier, the secondary cell modulation scheme and the Resource allocation can be performed efficiently. Thus, the base station apparatus 2 can perform appropriate scheduling based on the reported power headroom.
なお、以上説明した実施形態は単なる例示に過ぎず、様々な変形例、置換例を用いて実現することができる。例えば、本上りリンク送信方式は、FDD(周波数分割復信)方式とTDD(時分割復信)方式とのどちらの通信システムに対しても適用可能である。また、各実施形態において、下りリンクコンポーネントキャリアの測定値として、パスロスを用いた例について説明したが、それ以外の測定値(SIR、SINR、RSRP、RSRQ、RSSI、BLER)を代わり用いてもよいし、これらの測定値のうち複数を組み合わせて使用することも可能である。
Note that the embodiment described above is merely an example, and can be realized by using various modifications and replacement examples. For example, this uplink transmission scheme can be applied to both communication systems of the FDD (frequency division duplex) scheme and the TDD (time division duplex) scheme. In each embodiment, an example using a path loss as a measurement value of a downlink component carrier has been described. However, other measurement values (SIR, SINR, RSRP, RSRQ, RSSI, BLER) may be used instead. However, it is also possible to use a combination of a plurality of these measured values.
また、説明の便宜上、実施形態の移動局装置1および基地局装置2を機能的なブロック図を用いて説明したが、移動局装置1および基地局装置2の各部の機能またはこれらの機能の一部を実現するためのプログラムを、コンピュータ読み取り可能な記録媒体に記録して、この記録媒体に記録されたプログラムをコンピュータシステムに読み込ませ、実行することにより移動局装置1や基地局装置2の制御を行なってもよい。なお、ここでいう「コンピュータシステム」とは、OSや周辺機器等のハードウェアを含むものとする。
Further, for convenience of explanation, the mobile station device 1 and the base station device 2 of the embodiment have been described using functional block diagrams. However, the functions of each part of the mobile station device 1 and the base station device 2 or one of these functions Is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to control the mobile station apparatus 1 and the base station apparatus 2. May be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices.
また、「コンピュータ読み取り可能な記録媒体」とは、半導体媒体(例えば、RAM、不揮発性メモリカード等)、光記録媒体(例えば、DVD、MO、MD、CD、BD等)、磁気記録媒体(例えば、磁気テープ、フレキシブルディスク等)等の可搬媒体、コンピュータシステムに内蔵されるディスクユニット等の記憶装置のことをいう。さらに、「コンピュータ読み取り可能な記録媒体」とは、インターネット等のネットワークや電話回線等の通信回線を介してプログラムを送信する場合の通信線のように、短時間の間、動的にプログラムを保持するもの、その場合のサーバやクライアントとなるコンピュータシステム内部の揮発性メモリのように、一定時間プログラムを保持しているものも含むものとする。また上記プログラムは、前述した機能の一部を実現するためのものであってもよく、さらに、前述した機能をコンピュータシステムに既に記録されているプログラムとの組み合わせで実現できるものであってもよい。
The “computer-readable recording medium” refers to a semiconductor medium (eg, RAM, nonvolatile memory card, etc.), an optical recording medium (eg, DVD, MO, MD, CD, BD, etc.), a magnetic recording medium (eg, , A magnetic tape, a flexible disk, etc.) and a storage device such as a disk unit built in a computer system. Furthermore, the “computer-readable recording medium” means that a program is dynamically held for a short time, like a communication line when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In this case, it is intended to include those that hold a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or a client in that case. Further, the program may be for realizing a part of the above-described functions, and may be capable of realizing the above-described functions in combination with a program already recorded in the computer system. .
また、上記各実施形態に用いた移動局装置1および基地局装置2の各機能ブロック、または諸特徴は、典型的にはIC(集積回路)であるLSIを含む回路内で構成されてもよい。その場合、LSIの集積密度はどのような密度で実現されていてもよい。各機能ブロックおよび諸特徴は個別にチップ化してもよいし、一部または全部を集積してチップ化してもよい。また、集積回路化の手法はLSIに限らず専用回路または汎用プロセッサで実現してもよい。また、半導体技術の進歩によりLSIに代替する集積回路化の技術が出現した場合、当該技術による集積回路を用いることも可能である。
In addition, each functional block or various features of the mobile station device 1 and the base station device 2 used in the above embodiments may be configured in a circuit including an LSI that is typically an IC (integrated circuit). . In that case, the integration density of the LSI may be realized at any density. Each functional block and various features may be individually chipped, or a part or all of them may be integrated into a chip. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, an integrated circuit based on the technology can also be used.
以上、この発明の実施形態について特定の具体例に基づいて詳述してきたが、本発明の趣旨ならびに請求の範囲は、これら特定の具体例に限定されないことは明らかである。すなわち、本明細書の記載は例示説明を目的としたものであり、本発明に対して何ら制限を加えるものではない。
As described above, the embodiments of the present invention have been described in detail based on specific specific examples. However, it is obvious that the gist and claims of the present invention are not limited to these specific specific examples. In other words, the description in the present specification is for illustrative purposes and does not limit the present invention.
1 移動局装置、2 基地局装置、11,12,13 送信装置、21,22,23 受信装置、101,201 受信部、102,202 復調部、103,203 復号部、104 測定処理部、105,204 制御部、106 ランダムアクセス制御部、107,205 符号部、108,206 変調部、109,207 送信部、110 タイミング管理部、111,208 上位レイヤ、112 PHR計算部、209 ネットワーク信号送受信部、DL_CC 下りリンクコンポーネントキャリア、PDCCH 物理下りリンク制御チャネル、PUCCH 物理上りリンク制御チャネル、PUSCH 物理上りリンク共用チャネル、UL_CC 上りリンクコンポーネントキャリア。
1 mobile station device, 2 base station device, 11, 12, 13 transmission device, 21, 22, 23 reception device, 101, 201 reception unit, 102, 202 demodulation unit, 103, 203 decoding unit, 104 measurement processing unit, 105 , 204 control unit, 106 random access control unit, 107, 205 encoding unit, 108, 206 modulation unit, 109, 207 transmission unit, 110 timing management unit, 111, 208 upper layer, 112 PHR calculation unit, 209 network signal transmission / reception unit DL_CC downlink component carrier, PDCCH physical downlink control channel, PUCCH physical uplink control channel, PUSCH physical uplink shared channel, UL_CC uplink component carrier.
Claims (26)
- 移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムであって、
複数の前記在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、前記第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含み、
前記基地局装置は、前記移動局装置に設定した前記第2の在圏セルを活性化し、
前記移動局装置は、前記基地局装置が活性化した前記第2の在圏セルの上りリンクの送信タイミングが、前記基地局装置から受信した前記第2の在圏セルに関する送信タイミング調整情報に基づき調整状態となったときに、パワーヘッドルームの報告のトリガ条件が満たされたと判断する、通信システム。 A communication system for reporting to a base station device a power headroom indicating a surplus of transmission power of a plurality of serving cells to which a mobile station device is connected,
The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell, and an uplink transmission timing different from the first serving cell, and is activated or deactivated A second serving cell to be
The base station device activates the second serving cell set in the mobile station device,
In the mobile station apparatus, the uplink transmission timing of the second serving cell activated by the base station apparatus is based on transmission timing adjustment information related to the second serving cell received from the base station apparatus. The communication system which judges that the trigger condition of the report of a power headroom was satisfy | filled when it came to the adjustment state. - 前記基地局装置は、Contention based Random Access手順を用いて、前記送信タイミング調整情報を通知する、請求項1に記載の通信システム。 The communication system according to claim 1, wherein the base station apparatus notifies the transmission timing adjustment information using a Contention based Random Access procedure.
- 前記基地局装置は、Non-contention based Random Access手順を用いて、前記送信タイミング調整情報を通知する、請求項1に記載の通信システム。 The communication system according to claim 1, wherein the base station apparatus notifies the transmission timing adjustment information using a Non-contention based Random Access procedure.
- 前記移動局装置は、前記パワーヘッドルームの報告のトリガ条件が満たされたと判断したときに、複数の前記在圏セルの活性化の状態と上りリンクの送信タイミングの調整状態とに基づいて、前記パワーヘッドルームを報告する在圏セルを決定する、請求項1に記載の通信システム。 When determining that the power headroom report trigger condition is satisfied, the mobile station apparatus, based on the activation state of the plurality of serving cells and the adjustment state of uplink transmission timing, The communication system according to claim 1, wherein a serving cell reporting power headroom is determined.
- 前記移動局装置は、活性化されており、かつ上りリンクの送信タイミングが調整状態である前記第2の在圏セルの前記パワーヘッドルームを、前記基地局装置へ報告する、請求項4に記載の通信システム。 The mobile station apparatus reports the power headroom of the second serving cell in which the mobile station apparatus is activated and the uplink transmission timing is in an adjusted state to the base station apparatus. Communication system.
- 移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムであって、
複数の前記在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、前記第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含み、
前記基地局装置は、前記移動局装置に設定した前記第2の在圏セルを活性化し、
前記移動局装置は、前記基地局装置が活性化した前記第2の在圏セルでランダムアクセス手順を実行し、前記ランダムアクセス手順の成功または失敗に基づいて、パワーヘッドルームの報告のトリガ条件が満たされたか否かを判断する、通信システム。 A communication system for reporting to a base station device a power headroom indicating a surplus of transmission power of a plurality of serving cells to which a mobile station device is connected,
The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell, and an uplink transmission timing different from the first serving cell, and is activated or deactivated A second serving cell to be
The base station device activates the second serving cell set in the mobile station device,
The mobile station apparatus performs a random access procedure in the second serving cell activated by the base station apparatus, and based on success or failure of the random access procedure, a trigger condition for reporting power headroom is set. A communication system that determines whether or not the condition is satisfied. - 前記ランダムアクセス手順は、Contention based Random Access手順であり、
前記移動局装置は、コンテンションレゾリューションを正しく受信したか否かに基づいて、前記パワーヘッドルームのトリガ条件が満たされたか否かを判断する、請求項6に記載の通信システム。 The random access procedure is a contention based random access procedure,
The communication system according to claim 6, wherein the mobile station apparatus determines whether a trigger condition for the power headroom is satisfied based on whether the contention resolution is correctly received. - 前記ランダムアクセス手順は、Non-contention based Random Access手順であり、
前記移動局装置は、ランダムアクセスレスポンスを正しく受信したか否かに基づいて、前記パワーヘッドルームのトリガ条件が満たされたか否かを判断する、請求項6に記載の通信システム。 The random access procedure is a non-contention based random access procedure,
The communication system according to claim 6, wherein the mobile station apparatus determines whether a trigger condition for the power headroom is satisfied based on whether or not a random access response is correctly received. - 前記移動局装置は、前記パワーヘッドルームの報告のトリガ条件が満たされたと判断したときに、複数の前記在圏セルの活性化の状態と上りリンクの送信タイミングの調整状態とに基づいて、前記パワーヘッドルームを報告する在圏セルを決定する、請求項6に記載の通信システム。 When determining that the power headroom report trigger condition is satisfied, the mobile station apparatus, based on the activation state of the plurality of serving cells and the adjustment state of uplink transmission timing, The communication system according to claim 6, wherein a serving cell reporting power headroom is determined.
- 前記移動局装置は、活性化されており、かつ上りリンクの送信タイミングが調整状態である前記第2の在圏セルの前記パワーヘッドルームを、前記基地局装置へ報告する、請求項9に記載の通信システム。 The mobile station apparatus reports the power headroom of the second serving cell in which the mobile station apparatus is activated and the uplink transmission timing is in an adjusted state to the base station apparatus. Communication system.
- 移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおける移動局装置であって、
複数の前記在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、前記第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含み、
前記基地局装置が活性化した前記第2の在圏セルの上りリンクの送信タイミングが、前記基地局装置から受信した前記第2の在圏セルに関する送信タイミング調整情報に基づき調整状態となったときに、パワーヘッドルームの報告のトリガ条件が満たされたと判断する、移動局装置。 A mobile station apparatus in a communication system that reports power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station apparatus is connected to the base station apparatus,
The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell, and an uplink transmission timing different from the first serving cell, and is activated or deactivated A second serving cell to be
When the uplink transmission timing of the second serving cell activated by the base station apparatus is in an adjustment state based on the transmission timing adjustment information related to the second serving cell received from the base station apparatus In addition, the mobile station apparatus determines that the power headroom reporting trigger condition is satisfied. - Contention based Random Access手順を用いて、前記送信タイミング調整情報を前記基地局装置から受信する、請求項11に記載の移動局装置。 The mobile station apparatus according to claim 11, wherein the transmission timing adjustment information is received from the base station apparatus using a Contention based Random Access procedure.
- Non-contention based Random Access手順を用いて、前記送信タイミング調整情報を前記基地局装置から受信する、請求項11に記載の移動局装置。 The mobile station apparatus according to claim 11, wherein the transmission timing adjustment information is received from the base station apparatus using a Non-contention based Random Access procedure.
- 前記パワーヘッドルームの報告のトリガ条件が満たされたと判断したときに、複数の前記在圏セルの活性化の状態と上りリンクの送信タイミングの調整状態とに基づいて、前記パワーヘッドルームを報告する在圏セルを決定する、請求項11に記載の移動局装置。 When it is determined that the trigger condition for reporting the power headroom is satisfied, the power headroom is reported based on the activation state of the plurality of serving cells and the adjustment state of uplink transmission timing The mobile station apparatus according to claim 11, wherein a serving cell is determined.
- 活性化されており、かつ上りリンクの送信タイミングが調整状態である前記第2の在圏セルの前記パワーヘッドルームを、前記基地局装置へ報告する、請求項14に記載の移動局装置。 The mobile station apparatus according to claim 14, wherein the mobile station apparatus reports the power headroom of the second serving cell in which the uplink transmission timing is in an adjusted state to the base station apparatus.
- 移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおける移動局装置であって、
複数の前記在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、前記第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含み、
前記基地局装置が活性化した前記第2の在圏セルでランダムアクセス手順を実行し、前記ランダムアクセス手順の成功または失敗に基づいて、パワーヘッドルームの報告のトリガ条件が満たされたか否かを判断する、移動局装置。 A mobile station apparatus in a communication system that reports power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station apparatus is connected to the base station apparatus,
The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell, and an uplink transmission timing different from the first serving cell, and is activated or deactivated A second serving cell to be
A random access procedure is executed in the second serving cell activated by the base station apparatus, and whether a trigger condition for power headroom reporting is satisfied based on success or failure of the random access procedure is determined. A mobile station device to judge. - 前記ランダムアクセス手順がContention based Random Access手順である場合、コンテンションレゾリューションを正しく受信したか否かに基づいて、前記パワーヘッドルームのトリガ条件が満たされたか否かを判断する、請求項16に記載の移動局装置。 When the random access procedure is a Contention based Random Access procedure, it is determined whether the trigger condition of the power headroom is satisfied based on whether the contention resolution is correctly received. The mobile station apparatus as described in.
- 前記ランダムアクセス手順がNon-contention based Random Access手順である場合、ランダムアクセスレスポンスを正しく受信したか否かに基づいて、前記パワーヘッドルームのトリガ条件が満たされたか否かを判断する、請求項16に記載の移動局装置。 17. When the random access procedure is a non-contention based random access procedure, it is determined whether or not a trigger condition of the power headroom is satisfied based on whether or not a random access response is correctly received. The mobile station apparatus as described in.
- 前記パワーヘッドルームの報告のトリガ条件が満たされたと判断したときに、複数の前記在圏セルの活性化の状態と上りリンクの送信タイミングの調整状態とに基づいて、前記パワーヘッドルームを報告する在圏セルを決定する、請求項16に記載の移動局装置。 When it is determined that the trigger condition for reporting the power headroom is satisfied, the power headroom is reported based on the activation state of the plurality of serving cells and the adjustment state of uplink transmission timing The mobile station apparatus according to claim 16, wherein a serving cell is determined.
- 活性化されており、かつ上りリンクの送信タイミングが調整状態である前記第2の在圏セルの前記パワーヘッドルームを、前記基地局装置へ報告する、請求項19に記載の移動局装置。 The mobile station apparatus according to claim 19, wherein the mobile station apparatus reports to the base station apparatus the power headroom of the second serving cell that is activated and whose uplink transmission timing is in an adjusted state.
- 移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおける基地局装置であって、
複数の前記在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、前記第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含み、
前記移動局装置に設定した前記第2の在圏セルを活性化し、活性化した前記第2の在圏セルに関する送信タイミング調整情報を前記移動局装置へ送信し、前記第2の在圏セルの上りリンクの送信タイミングを調整状態とすることによって、前記移動局装置にパワーヘッドルームの報告のトリガ条件が満たされたと判断させる、基地局装置。 A base station apparatus in a communication system that reports power headroom indicating the remaining power of transmission power of a plurality of serving cells to which a mobile station apparatus is connected to the base station apparatus,
The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell, and an uplink transmission timing different from the first serving cell, and is activated or deactivated A second serving cell to be
The second serving cell set in the mobile station device is activated, transmission timing adjustment information related to the activated second serving cell is transmitted to the mobile station device, and the second serving cell of the second serving cell is transmitted. A base station apparatus that causes the mobile station apparatus to determine that a trigger condition for power headroom reporting is satisfied by setting an uplink transmission timing to an adjusted state. - 移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおける基地局装置であって、
複数の前記在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、前記第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含み、
前記移動局装置に設定した前記第2の在圏セルを活性化し、活性化した前記第2の在圏セルのランダムアクセス手順を前記移動局装置に実行させることによって、前記移動局装置に、前記ランダムアクセス手順の成功または失敗に基づいて、パワーヘッドルームの報告のトリガ条件が満たされたか否かを判断させる、基地局装置。 A base station apparatus in a communication system that reports power headroom indicating the remaining power of transmission power of a plurality of serving cells to which a mobile station apparatus is connected to the base station apparatus,
The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell, and an uplink transmission timing different from the first serving cell, and is activated or deactivated A second serving cell to be
By activating the second serving cell set in the mobile station device and causing the mobile station device to execute a random access procedure of the activated second serving cell, the mobile station device causes the mobile station device to execute the random access procedure. A base station apparatus that determines whether a trigger condition for power headroom reporting is satisfied based on success or failure of a random access procedure. - 移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおけるパワーヘッドルーム報告方法であって、
複数の前記在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、前記第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含み、
前記基地局装置は、前記移動局装置に設定した前記第2の在圏セルを活性化し、
前記移動局装置は、前記基地局装置が活性化した前記第2の在圏セルの上りリンクの送信タイミングが、前記基地局装置から受信した前記第2の在圏セルに関する送信タイミング調整情報に基づき調整状態となったときに、パワーヘッドルームの報告のトリガ条件が満たされたと判断する、パワーヘッドルーム報告方法。 A power headroom reporting method in a communication system for reporting to a base station device a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which a mobile station device is connected,
The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell, and an uplink transmission timing different from the first serving cell, and is activated or deactivated A second serving cell to be
The base station device activates the second serving cell set in the mobile station device,
In the mobile station apparatus, the uplink transmission timing of the second serving cell activated by the base station apparatus is based on transmission timing adjustment information related to the second serving cell received from the base station apparatus. A power headroom reporting method for determining that a trigger condition for power headroom reporting is satisfied when an adjustment state is reached. - 移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおけるパワーヘッドルーム報告方法であって、
複数の前記在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、前記第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含み、
前記基地局装置は、前記移動局装置に設定した前記第2の在圏セルを活性化し、
前記移動局装置は、前記基地局装置が活性化した前記第2の在圏セルでランダムアクセス手順を実行し、前記ランダムアクセス手順の成功または失敗に基づいて、パワーヘッドルームの報告のトリガ条件が満たされたか否かを判断する、パワーヘッドルーム報告方法。 A power headroom reporting method in a communication system for reporting to a base station device a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which a mobile station device is connected,
The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell, and an uplink transmission timing different from the first serving cell, and is activated or deactivated A second serving cell to be
The base station device activates the second serving cell set in the mobile station device,
The mobile station apparatus performs a random access procedure in the second serving cell activated by the base station apparatus, and based on success or failure of the random access procedure, a trigger condition for reporting power headroom is set. A power headroom reporting method to determine if it has been met. - 移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおける移動局装置に搭載される集積回路であって、
複数の前記在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、前記第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含み、
前記基地局装置が活性化した前記第2の在圏セルの上りリンクの送信タイミングが、前記基地局装置から受信した前記第2の在圏セルに関する送信タイミング調整情報に基づき調整状態となったときに、パワーヘッドルームの報告のトリガ条件が満たされたと判断する、集積回路。 An integrated circuit mounted on a mobile station device in a communication system that reports to a base station device a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station device is connected,
The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell, and an uplink transmission timing different from the first serving cell, and is activated or deactivated A second serving cell to be
When the uplink transmission timing of the second serving cell activated by the base station apparatus is in an adjustment state based on the transmission timing adjustment information related to the second serving cell received from the base station apparatus And the integrated circuit determines that the power headroom reporting trigger condition has been met. - 移動局装置が接続している複数の在圏セルの送信電力の余力を示すパワーヘッドルームを基地局装置へ報告する通信システムにおける移動局装置に搭載される集積回路であって、
複数の前記在圏セルは、プライマリセルと同じ上りリンクの送信タイミングを持つ第1の在圏セルと、前記第1の在圏セルとは異なる上りリンクの送信タイミングを持ち、活性化または不活性化される第2の在圏セルとを含み、
前記基地局装置が活性化した前記第2の在圏セルでランダムアクセス手順を実行し、前記ランダムアクセス手順の成功または失敗に基づいて、パワーヘッドルームの報告のトリガ条件が満たされたか否かを判断する、集積回路。 An integrated circuit mounted on a mobile station device in a communication system that reports to a base station device a power headroom indicating the remaining power of transmission power of a plurality of serving cells to which the mobile station device is connected,
The plurality of serving cells have a first serving cell having the same uplink transmission timing as the primary cell, and an uplink transmission timing different from the first serving cell, and is activated or deactivated A second serving cell to be
A random access procedure is executed in the second serving cell activated by the base station apparatus, and whether a trigger condition for power headroom reporting is satisfied based on success or failure of the random access procedure is determined. Integrated circuit to judge.
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WO2010150552A1 (en) * | 2009-06-26 | 2010-12-29 | パナソニック株式会社 | Radio communication apparatuses and radio communication method |
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WO2010150552A1 (en) * | 2009-06-26 | 2010-12-29 | パナソニック株式会社 | Radio communication apparatuses and radio communication method |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US9414315B2 (en) | 2013-02-05 | 2016-08-09 | Apple Inc. | Reducing power consumption in connected mode discontinuous reception |
CN106105301A (en) * | 2014-03-06 | 2016-11-09 | 夏普株式会社 | Termination, base station apparatus, communication system, control method and integrated circuit |
CN106105301B (en) * | 2014-03-06 | 2019-11-08 | 夏普株式会社 | Terminal installation, base station apparatus, communication system, control method |
CN113348703A (en) * | 2019-02-01 | 2021-09-03 | 株式会社Ntt都科摩 | User device and base station device |
WO2022194041A1 (en) * | 2021-03-16 | 2022-09-22 | 夏普株式会社 | Random access reporting method and user equipment |
Also Published As
Publication number | Publication date |
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JP2012169913A (en) | 2012-09-06 |
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