WO2012096296A1 - ユーザ装置及び測定方法 - Google Patents
ユーザ装置及び測定方法 Download PDFInfo
- Publication number
- WO2012096296A1 WO2012096296A1 PCT/JP2012/050354 JP2012050354W WO2012096296A1 WO 2012096296 A1 WO2012096296 A1 WO 2012096296A1 JP 2012050354 W JP2012050354 W JP 2012050354W WO 2012096296 A1 WO2012096296 A1 WO 2012096296A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rssi
- subframe
- rsrq
- measurement
- cell
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0094—Definition of hand-off measurement parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0073—Allocation arrangements that take into account other cell interferences
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
Definitions
- the present invention relates to a user device and a measurement method.
- UE User Equipment
- the user equipment moves from a serving cell to a neighboring cell and the signal from the neighboring cell becomes stronger than the signal from the serving cell (the cell that originally performed communication), the user equipment moves to the neighboring cell. Perform a handover.
- the user apparatus performs handover according to the procedure shown in FIG.
- the user apparatus measures the signal power of the adjacent cell.
- the user apparatus checks whether or not the signal power of the adjacent cell satisfies the following (Equation 1).
- the offset is a value provided in order to prevent frequent handover from the serving cell to the adjacent cell at the cell boundary, and may be a positive value or a negative value. In general, a positive value is used as a value provided in order to prevent frequent handovers.
- the network When the network receives the event (Event A3) in S3, the network determines that the user apparatus performs handover to the cell in which the event (Event A3) is reported, and executes the handover procedure (S3).
- Event A3 The event described above is defined as “Event A3”, but may be defined as another event, that is, an event other than “Event A3”.
- the signal power in the example described above is, for example, the power RP of the LTE (Long Term Evolution RS) that is the successor of LTE (Long Term Evolution RS), which is the successor of WCDMA (Wideband Code Division Multiple Access) or HSDPA (High Speed Downlink Packet Access) (Reference Signal Received Power) ".
- LTE Long Term Evolution RS
- WCDMA Wideband Code Division Multiple Access
- HSDPA High Speed Downlink Packet Access
- Non-Patent Document 1 The LTE described above may be referred to as “E-UTRA / E-UTRAN”. More specifically, the reference signal may be a common reference signal.
- RSRQ Reference Signal Received Quality
- I a value obtained by dividing RSRP by “RSSI (Received Signal Strength Indicator), and is defined in Non-Patent Document 1. That is, RSRQ is calculated by the following (Formula 2).
- RSSI is the total received power of all signals such as a desired signal from a serving cell, an interference signal from an adjacent cell, and a noise signal due to thermal noise, that is, total received power, and is defined in Non-Patent Document 1. .
- the RSSI may be referred to as “E-UTRA carrier RSSI”.
- the above RSSI values are different for different frequency carriers.
- the frequency carrier with a high degree of congestion has a large RSSI value
- the frequency carrier with a low degree of congestion has a small RSSI value.
- the RSRQ value may differ depending on the RSSI value depending on the degree of congestion or the like. Therefore, RSRQ is used, for example, when performing a different frequency handover.
- RSRP and RSRQ may be used not only for the above-mentioned “Event A3” but also for other events.
- RS SIR which is the SIR of the reference signal may be used instead of the above-described RSRP or RSRQ.
- the above-described RSRP, RSRQ, and RS SIR may be collectively referred to as radio quality, radio signal quality, or “Radio quality”.
- the radio quality used for the handover described above greatly affects the communication quality of the mobile communication system.
- the measurement accuracy in S1 is related to the quality of handover.
- the handover is not actually performed in the area to be handed over, and the communication is disconnected. Occurs.
- the RSSI used for the above RSRQ calculation is measured only in the OFDM symbol including the reference signal, as shown in FIG.
- OFDM symbols # 0 / # 4 / # 7 / # 11 are OFDM symbols including a reference signal, and other OFDM symbols are OFDM symbols not including a reference signal.
- the reference signal is the reference signal of the antenna port 0 when there are a plurality of transmission antennas.
- e-ICIC Enhanced Inter Cell Interference Coordination
- neighboring cells that are cells that cause interference do not transmit downlink signals in, for example, subframes # 2 / # 3 / # 6 / # 7.
- a user apparatus that performs communication in a serving cell that receives interference measures RSRP and RSRQ only in subframes # 2 / # 3 / # 6 / # 7 in which no downlink signal is transmitted.
- the RRC signaling determines whether the user apparatus performs the RSRP or RSRQ measurement from the network. Will be notified.
- a specific subframe that is, a subframe in which there is no interference from a neighboring cell. Further, the specific subframe is notified from the network to the user apparatus.
- RSSI which is a denominator when RSRQ is calculated, is measured only in an OFDM symbol including a reference signal, as shown in FIG.
- the RSSI value described above always includes the power of the reference signal of the adjacent cell as shown in FIG.
- the RSSI is measured in the OFDM symbol # 0 / # 4 / # 7 / # 11 of the serving cell, the RSSI is always included in the OFDM symbol # 0 / # 4 / # 7 of the adjacent cell. / # 11 reference signal power is included.
- the RSRQ calculation includes the influence of the signal from the neighboring cell that should originally be excluded, so that there is a problem that the RSRQ cannot be calculated appropriately.
- the neighboring cell transmits only the reference signal
- the serving cell transmits both the reference signal and the data signal
- the signal from the neighboring cell is 10 times larger than the signal from the serving cell.
- the value of RSRQ is calculated as follows.
- RSRQ excluding signals from neighboring cells is calculated as follows.
- RSRQ 1/12, “1/12” is “ ⁇ 10.8 dB” in terms of dB value.
- an object of the present invention is to provide a user apparatus and a measurement method that can accurately measure wireless quality.
- a first feature of the present invention is a user apparatus configured to measure radio quality of a serving cell and an adjacent cell, and in a predetermined subframe, the radio signal is transmitted in all time symbols in the predetermined subframe.
- a measurement unit configured to measure quality, and in a subframe other than the predetermined subframe, a measurement unit configured to measure the radio quality in a time symbol including a reference signal in the subframe. The gist is to provide.
- a second feature of the present invention is a user apparatus configured to measure radio quality of a serving cell and an adjacent cell, and in a predetermined subframe, a time symbol that does not include a reference signal in the predetermined subframe In the subframe other than the predetermined subframe, the radio quality is measured in a time symbol including a reference signal in the subframe.
- the gist is to have a measuring unit.
- a third feature of the present embodiment is a user apparatus configured to measure the radio quality of a serving cell and an adjacent cell, and the radio quality includes the reception power of the reference signal of the serving cell and the adjacent cell, the bandwidth And a measurement unit configured to measure the wireless quality when calculated from the total received power in the band, and the measurement unit uses the reference of an adjacent cell to the total received power in the band.
- the gist is to calculate the total received power in the band so that the received power of the signal is not included.
- a measurement method for measuring radio quality of a serving cell and an adjacent cell the step A for determining a time symbol for measuring the radio quality, and the determination of the radio symbol in the determined time symbol. And measuring the quality of the time symbol according to whether interference coordination is applied or not.
- FIG. 1 is a flowchart of a handover method in a conventional mobile communication system.
- FIG. 2 is a diagram illustrating an OFDM symbol for performing RSSI measurement in a conventional mobile communication system.
- FIG. 3 is a diagram illustrating RSRP and RSRQ reception timings when interference coordination is performed between a serving cell and an adjacent cell in a conventional mobile communication system.
- FIG. 4 is a diagram illustrating OFDM symbols for performing RSSI measurement when interference coordination is performed between a serving cell and an adjacent cell in a conventional mobile communication system.
- FIG. 5 is a diagram illustrating OFDM symbols for measuring RSSI in the mobile communication system according to the first embodiment of the present invention.
- FIG. 6 is a diagram illustrating OFDM symbols for measuring RSSI in the mobile communication system according to the first embodiment of the present invention.
- FIG. 7 is a diagram illustrating OFDM symbols for measuring RSSI in the mobile communication system according to the first embodiment of the present invention.
- FIG. 8 is a diagram illustrating OFDM symbols for measuring RSSI in the mobile communication system according to the first embodiment of the present invention.
- FIG. 9 is a functional block diagram of the user apparatus according to the first embodiment of the present invention.
- FIG. 10 is a flowchart of the measurement method in the mobile communication system according to the first embodiment of the present invention.
- Mobile communication system according to the first embodiment of the present invention A mobile communication system according to a first embodiment of the present invention will be described below with reference to the drawings.
- 5 and 6 are diagrams showing RSSI measurement sections in the mobile communication system according to the present embodiment.
- the RSSI of all OFDM symbols in one subframe is measured and interference coordination is performed as shown in FIG.
- RSSI of an OFDM symbol including a reference signal in one subframe is measured.
- the determination of “when interference coordination is applied” and “when interference coordination is not applied” may be performed as follows.
- a subframe for measuring interference coordination that is, RSRP and RSRQ for e-ICIC
- RRC signaling in the designated subframe, as shown in FIG.
- RRM measurement Radio Resource Management measurement
- the RSSI of all OFDM symbols in the frame may be measured.
- the RSSI of the OFDM symbol including the reference signal in one subframe may be measured.
- Such a subframe for RRM measurement may be a subframe for measurement of RRM and Radio link monitoring.
- the subframe for the RRM measurement may be notified individually to the serving cell and the neighboring cell that are the measurement target.
- the RSSI of all OFDM symbols in one subframe is calculated in the RSRQ calculation of the serving cell as shown in FIG. You may measure.
- the subframe in which RSSI is measured is the above-described subframe for RRM measurement.
- the measurement shown in FIG. 7 may be performed instead of the measurement shown in FIG.
- the RSSI of an OFDM symbol not including a reference signal in one subframe is measured, and interference coordination is not applied.
- the RSSI of the OFDM symbol including the reference signal in one subframe may be measured.
- the measurement shown in FIG. 8 may be performed instead of the measurement shown in FIG.
- the RSSI is measured in the OFDM symbol whose transmission timing is the same as the OFDM symbol in which the reference signal in the adjacent cell is transmitted. Instead, the process of measuring the RSSI with other OFDM symbols may be performed.
- the OFDM symbols whose transmission timing is the same as the OFDM symbol in which the reference signal is transmitted are OFDM symbols # 1 / # 5 / # 8 / # 12, and the other OFDM symbols are: OFDM symbols # 0 / # 2 / # 3 / # 4 / # 6 / # 7 / # 9 / # 10 / # 11 / # 13.
- the RSSI of the OFDM symbol including the reference signal in one subframe may be measured as shown in FIG.
- the transmission timing of the adjacent cell may be notified from the base station apparatus eNB by RRC control information, broadcast information, or the like.
- the transmission timing of the neighboring cell may be notified in units of OFDM symbols.
- a difference in relative timing with the transmission timing of the serving cell may be notified as the transmission timing of the neighboring cell.
- the transmission timing of an adjacent cell may be specified by the user apparatus UE detecting autonomously.
- the RSSI of the OFDM symbol specified by the base station apparatus eNB is measured, and in the RSRQ measurement when the interference coordination is not applied, one subframe is measured.
- the RSSI of the OFDM symbol including the reference signal in the signal may be measured.
- the RSSI of OFDM symbol # 2 / # 4 is measured in the RSRQ measurement when interference coordination is applied.
- the RSSI of the ODFM symbols # 0 / # 4 / # 7 / # 11 may be measured as shown in FIG.
- the information regarding the OFDM symbol designated by the base station apparatus eNB may be notified by RRC signaling.
- information on the OFDM symbol an OFDM symbol used for RSSI measurement may be specified, or an OFDM symbol not used for RSSI measurement may be specified.
- information related to the OFDM symbol any form of information may be specified as long as the OFDM symbol used for RSSI measurement can be specified.
- RSRQ and RSSI measurements described above may be performed as measurements of the RSRQ and RSSI of the serving cell, or may be performed as measurements of the RSRQ and RSSI of the neighboring cell.
- the measurement method in the measurement of the RSRQ of the serving cell and the neighboring cell is shown. However, this may be applied to the measurement of the serving cell and the neighboring cell when the user apparatus 10 is in the idle state.
- FIG. 9 is a functional block diagram of the user apparatus 10 according to the present embodiment.
- the user apparatus 10 includes an RRC signal reception unit 101, a measurement OFDM symbol determination unit 103, a reception unit 105, an RSSI measurement unit 107, an RSRP measurement unit 109, and an RSRQ calculation unit 111.
- RRC signal reception unit 101 a measurement OFDM symbol determination unit 103
- reception unit 105 a reception unit 105
- RSSI measurement unit 107 a measurement OFDM symbol determination unit
- RSRP measurement unit 109 an RSRP measurement unit 109
- RSRQ calculation unit 111 an RSRQ calculation unit 111.
- the RRC signal receiving unit 101 is configured to receive an RRC layer control signal from the base station apparatus eNB.
- the RRC signal receiving unit 101 is configured to receive information on whether or not interference coordination, that is, e-ICIC is applied in the cell, as an RRC layer control signal.
- the RRC signal receiving unit 101 is configured to receive information on interference coordination, that is, information on subframes for measurement of RSRP and RSRQ in e-ICIC, as an RRC layer control signal.
- Information notified by the control signal of the RRC layer described above for example, information on whether or not interference coordination, that is, e-ICIC is applied in the cell, interference coordination, that is, RSRP in e-ICIC, Information on subframes for RSRQ measurement is sent to measurement OFDM symbol determination section 103.
- the measurement OFDM symbol determination unit 103 is configured to determine an OFDM symbol for measuring RSSI.
- the measurement OFDM symbol determination unit 103 receives the information notified by the RRC layer control signal from the RRC signal reception unit 101, and based on the information notified by the RRC layer control signal, the RSSI May be configured to determine an OFDM symbol for measuring.
- the measurement OFDM symbol determination unit 103 measures all the OFDM symbols in one subframe as shown in FIG.
- an OFDM symbol including a reference signal in one subframe is an OFDM symbol for measuring RSSI. It may be configured to determine.
- the measurement OFDM symbol determination unit 103 measures the RSSI of the OFDM symbol not including the reference signal in one subframe, as shown in FIG. 7, in the RSRQ measurement when interference coordination is applied.
- the OFDM symbol including the reference signal in one subframe is determined to be the OFDM symbol for measuring the RSSI. It may be configured.
- the measurement OFDM symbol determination unit 103 is configured to notify the RSSI measurement unit 107 of the OFDM symbol for measuring the determined RSSI.
- the receiving unit 105 is configured to receive signals transmitted from the serving cell and the neighboring cells.
- the signal received by the receiving unit 105 includes a reference signal used for RSRP measurement.
- the receiving unit 105 is configured to send the received signal to the RSSI measuring unit 107 and the RSRP measuring unit 109.
- the RSSI receiving unit 107 is configured to receive the OFDM symbol for measuring the RSSI from the measurement OFDM symbol determining unit 103 and measure the RSSI in the OFDM symbol for measuring the RSSI.
- RSSI is the sum of received power of all signals such as a desired signal from a serving cell, an interference signal from an adjacent cell, and a noise signal due to thermal noise.
- the RSSI receiving unit 107 is configured to send the measured RSSI to the RSRQ calculating unit 111.
- the RSRP measurement unit 109 is configured to measure the RSRP of the serving cell and the neighboring cell and send the measured RSRP of the serving cell and the neighboring cell to the RSRQ calculation unit 111.
- the RSRQ calculation unit 111 is configured to receive the RSSI from the RSSI measurement unit 107 and the RSRP of the serving cell and the neighboring cell from the RSRP measurement unit 109.
- RSRQ calculation part 111 calculates RSRQ of a serving cell and an adjacent cell based on the following (formula 3).
- RSRQ RSRP / RSSI (Formula 3)
- the measurement method in the RSSI and RSRQ measurement of the serving cell and the neighboring cell may be applied to the measurement of the serving cell and the neighboring cell when the user apparatus 10 is in the idle state.
- the serving cell and the neighboring cell are measured.
- FIG. 10 is a flowchart of the measurement method in the mobile communication system according to the present embodiment.
- step S201 the user apparatus 10 determines whether or not it is a subframe to which interference coordination control is applied.
- the user apparatus 10 measures RSSI in all OFDM symbols in step S203.
- step S201 the user apparatus 10 measures RSSI in the OFDM symbol including the reference signal in step S205.
- the user apparatus 10 may calculate RSRQ using RSSI calculated by this flowchart.
- step S207 the user apparatus 10 measures the RSRP of the serving cell and the neighboring cell.
- step S209 the user apparatus 10 measures the RSRQ of the serving cell and the neighboring cell.
- RSRQ is calculated as shown in (Formula 4) below.
- RSRQ RSRP / RSSI (Formula 4)
- the user apparatus 10 may measure RSSI using OFDM symbols that do not include a reference signal, as shown in FIG. 7, instead of measuring RSSI using all OFDM symbols.
- the measurement method of the RSRQ of the serving cell and the neighboring cell was shown. May be applied to the RSRQ measurement of the serving cell and the neighboring cell when the user apparatus 10 is in the idle state.
- the RSRQ of the serving cell and the neighboring cell is measured.
- the mobile communication system it is possible to accurately measure the radio quality of the serving cell and the neighboring cell based on whether or not interference coordination is performed.
- RSSI is measured by using an OFDM symbol including a reference signal in a subframe, thereby performing RSSI. Can be prevented from approaching “0”, the value of RSRQ can be prevented from diverging infinitely, and RSSI or RSRQ can be measured appropriately.
- interference is measured by measuring RSSI with an OFDM symbol that does not include a reference signal in a subframe. Therefore, it is possible to eliminate the influence of the power of the reference signal from the adjacent cell that gives the signal, and appropriately measure RSSI or RSRQ.
- RSSI is measured by using an OFDM symbol including a reference signal in a subframe, thereby performing RSSI. Can be prevented from approaching “0”, the value of RSRQ can be prevented from diverging infinitely, and RSSI or RSRQ can be measured appropriately.
- RSSI is measured with the OFDM symbol shown in FIG. 5 when interference coordination is performed, and RSSI is measured with the OFDM symbol shown in FIG. 6 when interference coordination is not performed.
- the RSRQ calculated from the RSSI measured with the OFDM symbol shown in FIG. 5 and the RSSI measured with the OFDM symbol shown in FIG. 6 are calculated. Both RSRQs may be measured.
- RSSI is measured with the OFDM symbol shown in FIG. 7 when interference coordination is performed, and RSSI is measured with the OFDM symbol shown in FIG. 6 when interference coordination is not performed.
- the RSRQ calculated from the RSSI measured with the OFDM symbol shown in FIG. 7 and the RSSI measured with the OFDM symbol shown in FIG. Both calculated RSRQs may be measured.
- RSRQ when interference coordination is performed, two types of RSRQ that are affected by the reference signal of the neighboring cell and RSRQ that is not affected by the reference signal of the neighboring cell are calculated. RSRQ can be measured.
- the above-described measurement of RSSI and RSRQ when interference coordination is performed may be applied depending on whether or not “MBSFN subframe” is set in the neighboring cell.
- the user apparatus 10 can determine the RSRQ calculated from the RSSI measured with the OFDM symbol shown in FIG. 5 or FIG. In other cases, the RSRQ calculated from the RSSI measured with the OFDM symbol shown in FIG. 6 may be measured.
- RSSI and RSRQ measurement when the above-described interference coordination is performed may be applied depending on whether or not the user apparatus 10 has a function of removing interference caused by a reference signal of an adjacent cell.
- the user apparatus 10 when the user apparatus 10 has a function of removing interference due to the reference signal of the adjacent cell and the interference coordination is applied, the user apparatus 10 performs measurement using the OFDM symbol illustrated in FIG. 5 or FIG. RSRQ calculated from RSSI to be measured may be measured, and in other cases, RSRQ calculated from RSSI measured using the OFDM symbol shown in FIG. 6 may be measured.
- RSSI and RSRQ measurements when the above-described interference coordination is performed may be applied when designated by the base station apparatus eNB.
- the base station apparatus eNB instructs the user apparatus 10 to measure RSSI and RSRQ according to the present embodiment
- the user apparatus 10 starts from the RSSI measured with the OFDM symbol shown in FIG.
- the calculated RSRQ may be measured, and in other cases, the RSRQ calculated from the RSSI measured with the OFDM symbol shown in FIG. 6 may be measured.
- each cell to be measured it may be controlled whether to perform RSSI and RSRQ measurement performed according to whether the above-described interference coordination is performed, or a subframe to be measured Each time, it may be controlled whether or not RSSI and RSRQ are measured according to whether or not the above-described interference coordination is performed.
- the user apparatus 10 selects an OFDM symbol for measuring RSSI so as not to be affected by a reference signal transmitted in a neighboring cell, and the OFDM symbol , RSSI was measured.
- the user apparatus 10 may measure the power of the reference signal transmitted in the adjacent cell and measure the RSSI in consideration of the power of the reference signal transmitted in the adjacent cell.
- the final RSSI may be calculated as follows.
- (Final RSSI value) (Measured RSSI value) ⁇ PowerNeighbor, RS That is, when interference coordination is performed, the user apparatus 10 may calculate the RSSI so that the power due to the reference signal transmitted in the adjacent cell is removed.
- the user apparatus 10 may calculate the RSSI by subtracting the power of the reference signal transmitted in the adjacent cell from the measured RSSI.
- the process of calculating the RSSI so that the power due to the reference signal transmitted in the neighboring cell is removed may be performed only in the OFDM symbol affected by the reference signal transmitted in the neighboring cell.
- the RSSI is calculated so that the power of the reference signal transmitted in the adjacent cell is removed.
- a process may be performed in which the process of calculating RSSI is not performed so that the power of the reference signal transmitted in the adjacent cell is removed.
- the present invention is not limited to LTE but can be applied to other mobile communication systems.
- the present invention is not limited to mobile communication systems in which the center frequencies are the same between cells, and can also be applied to different frequency measurement when the frequencies are different.
- the present invention can also be applied to different RAT measurement in a case where radio access technology (RAT: Radio Access Technology) is different depending on a cell.
- RAT Radio Access Technology
- a first feature of the present embodiment is a user apparatus 10 configured to measure the radio quality of a serving cell and an adjacent cell, and in a predetermined subframe, all OFDM symbols (time symbols) in the predetermined subframe. In the subframe other than the predetermined subframe, the radio quality of the serving cell and the neighboring cell is determined in the OFDM symbol including the reference signal in the subframe.
- the gist of the present invention is to include an RSSI measuring unit 107 configured to measure the above.
- the predetermined subframe may be a subframe for measurement when interference coordination is applied.
- the predetermined subframe may be notified from the base station apparatus eNB by RRC signaling.
- the above-described wireless quality may be RSSI, or more specifically, RSSI used for calculation of RSRQ.
- the predetermined subframe may be a subframe for RSRP and RSRQ measurement.
- the predetermined subframe may be a specific subframe for serving cell measurement.
- the predetermined subframe may be a specific subframe for measuring a neighboring cell.
- a second feature of the present embodiment is a user apparatus 10 configured to measure radio quality of a serving cell and an adjacent cell, and a predetermined subframe does not include a reference signal in the predetermined subframe.
- the radio quality of the serving cell and the neighboring cell is measured, and in the subframe other than the predetermined subframe, the radio quality of the serving cell and the neighboring cell is determined in the OFDM symbol including the reference signal in the subframe.
- the gist is to include an RSSI measurement unit 107 configured to measure.
- a third feature of the present embodiment is a user apparatus 10 configured to measure the radio quality of the serving cell and the neighboring cell, where the radio quality of the serving cell and the neighboring cell is the reference signal of the serving cell and the neighboring cell.
- the RSSI measuring unit 107 configured to measure the radio quality of the serving cell and the neighboring cell is provided.
- the gist of the present invention is to calculate the total received power in the band so that the received power of the reference signal of the adjacent cell is not included in the total received power.
- the fourth feature of the present embodiment is a measurement method for measuring the radio quality of the serving cell and the neighboring cell, the step A for determining an OFDM symbol for measuring the radio quality of the serving cell and the neighboring cell, and the determined OFDM symbol. And measuring a radio quality of the serving cell and the neighboring cell in step B.
- step B an OFDM symbol for measuring the radio quality of the serving cell and the neighboring cell is determined according to whether interference coordination is applied or not. The gist is to do.
- the operations of the user apparatus 10 (UE) and the base station apparatus eNB described above may be implemented by hardware, may be implemented by a software module executed by a processor, or may be implemented by a combination of both. May be.
- the software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM).
- RAM Random Access Memory
- flash memory ROM (Read Only Memory)
- EPROM Erasable Programmable ROM
- EEPROM Electrically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM.
- it may be provided in a storage medium of an arbitrary format such as a CD-ROM.
- the storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the user apparatus 10 (UE) and the base station apparatus eNB. Moreover, this storage medium and processor may be provided in the user apparatus 10 (UE) and the base station apparatus eNB as a discrete component.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Noise Elimination (AREA)
Abstract
Description
(式1)が満たされた場合に、ユーザ装置は、S2において、そのイベント(Event A3)をネットワーク(基地局装置)に報告する。
RSSIとは、サービングセルからの希望信号や隣接セルからの干渉信号や熱雑音による雑音信号等の全ての信号の受信電力の合計、すなわち、総受信電力であり、非特許文献1に定義されている。RSSIは、「E-UTRA carrier RSSI」と呼ばれてもよい。
本発明の第1の実施形態に係る移動通信システムについて、図面を参照して以下に説明する。
図9は、本実施形態に係るユーザ装置10の機能ブロック図である。図9に示すように、ユーザ装置10は、RRC信号受信部101と、測定OFDMシンボル決定部103と、受信部105と、RSSI測定部107と、RSRP測定部109と、RSRQ算出部111とを有する。
また、上述した例では、ユーザ装置10がネットワーク(基地局装置eNB)と通信中である場合、すなわち、ユーザ装置10がRRC Connected状態である場合のサービングセル及び隣接セルのRSSI及びRSRQ測定における測定方法について示したが、ユーザ装置10がIdle状態である場合のサービングセル及び隣接セルの測定に関して適用されてもよい。
図10は、本実施形態に係る移動通信システムにおける測定方法のフローチャートである。
なお、上述したステップS203において、ユーザ装置10は、全てのOFDMシンボルでRSSIを測定する代わりに、図7に示すように、リファレンス信号を含まないOFDMシンボルでRSSIを測定してもよい。
すなわち、ユーザ装置10は、干渉コーディネーションが行われている場合に、隣接セルにおいて送信されるリファレンス信号による電力が除去されるようにRSSIを算出してもよい。
101…RRC信号受信部
103…測定OFDMシンボル決定部
105…受信部
107…RSSI測定部
109…RSRP測定部
111…RSRQ算出部
Claims (11)
- サービングセル及び隣接セルの無線品質を測定するように構成されているユーザ装置であって、
所定サブフレームでは、該所定サブフレーム内の全ての時間シンボルにおいて、前記無線品質を測定するように構成されており、
前記所定サブフレーム以外のサブフレームでは、該サブフレーム内のリファレンス信号が含まれる時間シンボルにおいて、前記無線品質を測定するように構成されている測定部を具備することを特徴とするユーザ装置。 - 前記所定サブフレームは、干渉コーディネーションが適用される場合の測定用のサブフレームであることを特徴とする請求項1に記載のユーザ装置。
- 前記所定サブフレームは、基地局装置よりRRCシグナリングにより通知されることを特徴とする請求項1に記載のユーザ装置。
- 前記無線品質は、RSSIであることを特徴とする請求項1に記載のユーザ装置。
- 前記無線品質は、RSRQの算出に用いるRSSIであることを特徴とする請求項1に記載のユーザ装置。
- サービングセル及び隣接セルの無線品質を測定するように構成されているユーザ装置であって、
所定サブフレームでは、該所定サブフレーム内のリファレンス信号が含まれない時間シンボルにおいて、前記無線品質を測定するように構成されており、
前記所定サブフレーム以外のサブフレームでは、該サブフレーム内のリファレンス信号が含まれる時間シンボルにおいて、前記無線品質を測定するように構成されている測定部を具備することを特徴とするユーザ装置。 - サービングセル及び隣接セルの無線品質を測定するように構成されているユーザ装置であって、
前記無線品質は、サービングセル及び隣接セルのリファレンス信号の受信電力と、帯域内のトータルの受信電力とから算出される場合に、前記無線品質を測定するように構成されている測定部を具備し、
前記測定部は、前記帯域内のトータルの受信電力に隣接セルのリファレンス信号の受信電力が含まれないように、前記帯域内のトータルの受信電力を算出することを特徴とするユーザ装置。 - サービングセル及び隣接セルの無線品質を測定する測定方法であって、
前記無線品質を測定する時間シンボルを決定するステップAと、
決定された前記時間シンボルにおいて、前記無線品質を測定するステップBと を有し、
前記ステップBにおいて、干渉コーディネーションが適用されるか否かに応じて、前記時間シンボルを決定することを特徴とする測定方法。 - 前記所定サブフレームは、RSRP及びRSRQの測定用のサブフレームであることを特徴とする請求項1に記載のユーザ装置。
- 前記所定サブフレームは、サービングセルの測定用の特定のサブフレームであることを特徴とする請求項1に記載のユーザ装置。
- 前記所定サブフレームは、隣接セルの測定用の特定のサブフレームであることを特徴とする請求項1に記載のユーザ装置。
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020137018797A KR20130117833A (ko) | 2011-01-11 | 2012-01-11 | 유저장치 및 측정방법 |
AU2012206093A AU2012206093B8 (en) | 2011-01-11 | 2012-01-11 | User equipment and measurement method |
MX2013008057A MX2013008057A (es) | 2011-01-11 | 2012-01-11 | Equipo de usuario y metodo de medicion. |
JP2012552740A JP5756129B2 (ja) | 2011-01-11 | 2012-01-11 | ユーザ装置及び測定方法 |
KR1020167016815A KR20160079139A (ko) | 2011-01-11 | 2012-01-11 | 유저장치 |
CN201280005089.XA CN103299674B (zh) | 2011-01-11 | 2012-01-11 | 用户装置及测定方法 |
EP12734020.6A EP2665332A4 (en) | 2011-01-11 | 2012-01-11 | USER DEVICE AND MEASURING PROCEDURE |
NZ613257A NZ613257B2 (en) | 2011-01-11 | 2012-01-11 | User equipment and measurement method |
CA2824275A CA2824275A1 (en) | 2011-01-11 | 2012-01-11 | User equipment and measurement method |
US13/979,176 US9497676B2 (en) | 2011-01-11 | 2012-01-11 | User equipment and measurement method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-003475 | 2011-01-11 | ||
JP2011003475 | 2011-01-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012096296A1 true WO2012096296A1 (ja) | 2012-07-19 |
Family
ID=46507191
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/050354 WO2012096296A1 (ja) | 2011-01-11 | 2012-01-11 | ユーザ装置及び測定方法 |
PCT/JP2012/050357 WO2012096299A1 (ja) | 2011-01-11 | 2012-01-11 | ユーザ装置及び測定方法 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/050357 WO2012096299A1 (ja) | 2011-01-11 | 2012-01-11 | ユーザ装置及び測定方法 |
Country Status (9)
Country | Link |
---|---|
US (2) | US9426706B2 (ja) |
EP (3) | EP3361823A1 (ja) |
JP (2) | JP5810100B2 (ja) |
KR (2) | KR20160079139A (ja) |
CN (2) | CN103299708B (ja) |
AU (1) | AU2012206093B8 (ja) |
CA (1) | CA2824275A1 (ja) |
MX (1) | MX2013008057A (ja) |
WO (2) | WO2012096296A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104067661A (zh) * | 2012-11-02 | 2014-09-24 | 华为技术有限公司 | 接收信号强度指示值的获取方法及用户设备 |
JP2017516341A (ja) * | 2014-04-28 | 2017-06-15 | インテル アイピー コーポレーション | 基準信号受信品質を測定するためのユーザ機器および方法 |
JP2017519466A (ja) * | 2014-05-09 | 2017-07-13 | インテル アイピー コーポレイション | 基準信号受信品質(rsrq)測定値の報告方法 |
JP2017530649A (ja) * | 2014-10-03 | 2017-10-12 | クゥアルコム・インコーポレイテッドQualcomm Incorporated | アンライセンススペクトルにおけるlteのための物理層プロシージャ |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6222093B2 (ja) * | 2012-07-20 | 2017-11-01 | ソニー株式会社 | 無線通信装置、情報処理装置、通信システム、通信品質算出方法およびプログラム |
JP5870891B2 (ja) * | 2012-10-11 | 2016-03-01 | ソニー株式会社 | 情報処理装置、無線通信装置、通信システムおよび情報処理方法 |
US9398480B2 (en) * | 2012-11-02 | 2016-07-19 | Telefonaktiebolaget L M Ericsson (Publ) | Methods of obtaining measurements in the presence of strong and/or highly varying interference |
US9503216B2 (en) | 2012-11-02 | 2016-11-22 | Telefonaktiebolaget L M Ericsson (Publ) | Methods and devices related to effective measurements |
JP5971111B2 (ja) * | 2012-12-20 | 2016-08-17 | 富士通株式会社 | 移動通信端末及びセル判定方法 |
JP6138486B2 (ja) * | 2012-12-28 | 2017-05-31 | 株式会社Nttドコモ | 移動機、受信方法、基地局及び移動機動作制御方法 |
JP6279207B2 (ja) * | 2013-01-10 | 2018-02-14 | 富士通株式会社 | 受信装置及び干渉雑音電力推定方法 |
WO2014148875A1 (en) * | 2013-03-22 | 2014-09-25 | Lg Electronics Inc. | Method and apparatus for performing interference coordination in wireless communication system |
US10237879B2 (en) | 2013-07-09 | 2019-03-19 | Lg Electronics Inc. | Method for channel state report in wireless communication system and apparatus therefor |
JP6444887B2 (ja) | 2013-12-25 | 2018-12-26 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカPanasonic Intellectual Property Corporation of America | 移動局及び受信品質測定方法 |
WO2015113273A1 (zh) * | 2014-01-29 | 2015-08-06 | 华为技术有限公司 | 一种无线资源管理的测量方法及装置 |
US9838951B2 (en) | 2014-03-14 | 2017-12-05 | Intel Corporation And Intel Ip Corporation | Apparatuses, systems, and methods for measuring quality of cell discovery signal |
CN105101282A (zh) | 2014-05-21 | 2015-11-25 | 中兴通讯股份有限公司 | 发现信号测量的方法、装置及用户终端 |
EP3190731B1 (en) * | 2014-09-02 | 2019-05-08 | LG Electronics Inc. | Synchronization signal transmission method and apparatus for device-to-device terminal in wireless communication system |
WO2017119794A1 (ko) * | 2016-01-08 | 2017-07-13 | 엘지전자 주식회사 | 채널 상태 정보 보고 방법 및 이를 수행하는 사용자 장치 |
WO2023023511A1 (en) * | 2021-08-16 | 2023-02-23 | Qualcomm Incorporated | Reference signal received quality for fully loaded reference signals |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009123163A1 (ja) * | 2008-03-31 | 2009-10-08 | 日本電気株式会社 | 無線通信システム、基地局、移動局及び送信パラメータの決定方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101287275B (zh) * | 2007-04-11 | 2011-05-11 | 中兴通讯股份有限公司 | 一种基于cdma系统的下行方向邻区干扰的测量方法 |
US9271174B2 (en) | 2007-08-07 | 2016-02-23 | Intel Deutschland Gmbh | Communication device performing measurements using assigned time slots |
US9867203B2 (en) * | 2008-07-11 | 2018-01-09 | Qualcomm Incorporated | Synchronous TDM-based communication in dominant interference scenarios |
CN101784116B (zh) * | 2009-01-19 | 2012-07-04 | 华为技术有限公司 | 一种探测参考信号资源分配的方法、系统和设备 |
US9253651B2 (en) * | 2009-05-01 | 2016-02-02 | Qualcom Incorporated | Transmission and detection of overhead channels and signals in a wireless network |
US8670432B2 (en) * | 2009-06-22 | 2014-03-11 | Qualcomm Incorporated | Methods and apparatus for coordination of sending reference signals from multiple cells |
CA2784035C (en) * | 2010-03-29 | 2020-07-21 | Lg Electronics Inc. | Method and apparatus for measurement for inter-cell interference coordination in radio communication system |
US9609536B2 (en) * | 2010-04-13 | 2017-03-28 | Qualcomm Incorporated | Measurement of received power and received quality in a wireless communication network |
US20120113961A1 (en) * | 2010-11-08 | 2012-05-10 | Motorola Mobility, Inc. | Interference Measurements in Enhanced Inter-Cell Interference Coordination Capable Wireless Terminals |
-
2012
- 2012-01-11 KR KR1020167016815A patent/KR20160079139A/ko not_active Application Discontinuation
- 2012-01-11 AU AU2012206093A patent/AU2012206093B8/en not_active Ceased
- 2012-01-11 JP JP2012552743A patent/JP5810100B2/ja active Active
- 2012-01-11 EP EP18163893.3A patent/EP3361823A1/en not_active Withdrawn
- 2012-01-11 EP EP12734020.6A patent/EP2665332A4/en not_active Withdrawn
- 2012-01-11 MX MX2013008057A patent/MX2013008057A/es active IP Right Grant
- 2012-01-11 US US13/979,191 patent/US9426706B2/en active Active
- 2012-01-11 CN CN201280005081.3A patent/CN103299708B/zh active Active
- 2012-01-11 WO PCT/JP2012/050354 patent/WO2012096296A1/ja active Application Filing
- 2012-01-11 KR KR1020137018797A patent/KR20130117833A/ko active Application Filing
- 2012-01-11 WO PCT/JP2012/050357 patent/WO2012096299A1/ja active Application Filing
- 2012-01-11 CN CN201280005089.XA patent/CN103299674B/zh active Active
- 2012-01-11 JP JP2012552740A patent/JP5756129B2/ja active Active
- 2012-01-11 CA CA2824275A patent/CA2824275A1/en not_active Abandoned
- 2012-01-11 US US13/979,176 patent/US9497676B2/en active Active
- 2012-01-11 EP EP12734738.3A patent/EP2665333A4/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009123163A1 (ja) * | 2008-03-31 | 2009-10-08 | 日本電気株式会社 | 無線通信システム、基地局、移動局及び送信パラメータの決定方法 |
Non-Patent Citations (4)
Title |
---|
"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer; Measurements (Release 10)", 3GPP TS 36.214 V10.0.0, December 2010 (2010-12-01), pages 1 - 13, XP050462368 * |
"LS rely on RLM/RSRQ/RSRP measurement definitions for eICIC", 3GPP TSG-RAN WG4 #58, R4-110708, 21 February 2011 (2011-02-21) - 25 February 2011 (2011-02-25), pages 1 - 2, XP050500826 * |
ERICSSON: "Simulation Results for IF TDD RSRP Requirements", 3GPP TSG-RAN WG4 MEETING #47, R4-080957, 5 May 2008 (2008-05-05) - 9 May 2008 (2008-05-09), XP050179570 * |
NTT DOCOMO: "Definition of RSSI in e-ICIC", 3GPP TSG-RAN WG4 MEETING #58, R4-110765, 21 February 2011 (2011-02-21) - 25 February 2011 (2011-02-25), XP050500869 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104067661A (zh) * | 2012-11-02 | 2014-09-24 | 华为技术有限公司 | 接收信号强度指示值的获取方法及用户设备 |
JP2017516341A (ja) * | 2014-04-28 | 2017-06-15 | インテル アイピー コーポレーション | 基準信号受信品質を測定するためのユーザ機器および方法 |
JP2017200226A (ja) * | 2014-04-28 | 2017-11-02 | インテル アイピー コーポレーション | 基準信号受信品質を測定するためのユーザ機器および方法 |
US10028184B2 (en) | 2014-04-28 | 2018-07-17 | Intel IP Corporation | User equipment and methods for measurement of reference signal received quality |
JP2017519466A (ja) * | 2014-05-09 | 2017-07-13 | インテル アイピー コーポレイション | 基準信号受信品質(rsrq)測定値の報告方法 |
JP2017530649A (ja) * | 2014-10-03 | 2017-10-12 | クゥアルコム・インコーポレイテッドQualcomm Incorporated | アンライセンススペクトルにおけるlteのための物理層プロシージャ |
US10721770B2 (en) | 2014-10-03 | 2020-07-21 | Qualcomm Incorporated | Physical layer procedures for LTE in unlicensed spectrum |
Also Published As
Publication number | Publication date |
---|---|
CN103299674A (zh) | 2013-09-11 |
WO2012096299A1 (ja) | 2012-07-19 |
EP3361823A1 (en) | 2018-08-15 |
CN103299674B (zh) | 2016-06-15 |
JPWO2012096296A1 (ja) | 2014-06-09 |
US20130336148A1 (en) | 2013-12-19 |
US20130336149A1 (en) | 2013-12-19 |
KR20130117833A (ko) | 2013-10-28 |
JP5810100B2 (ja) | 2015-11-11 |
AU2012206093B2 (en) | 2015-02-12 |
AU2012206093B8 (en) | 2015-05-28 |
JPWO2012096299A1 (ja) | 2014-06-09 |
NZ613257A (en) | 2014-11-28 |
EP2665332A1 (en) | 2013-11-20 |
MX2013008057A (es) | 2013-08-09 |
CN103299708A (zh) | 2013-09-11 |
CN103299708B (zh) | 2016-12-14 |
US9426706B2 (en) | 2016-08-23 |
CA2824275A1 (en) | 2012-07-19 |
JP5756129B2 (ja) | 2015-07-29 |
US9497676B2 (en) | 2016-11-15 |
KR20160079139A (ko) | 2016-07-05 |
EP2665332A4 (en) | 2015-12-16 |
EP2665333A1 (en) | 2013-11-20 |
EP2665333A4 (en) | 2017-09-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5756129B2 (ja) | ユーザ装置及び測定方法 | |
US8824969B2 (en) | Radio base station and mobile communication method | |
US9596042B2 (en) | Methods of performing inter-frequency measurements in the IDLE state | |
US9585104B2 (en) | Performing inter-frequency measurements on carriers with overlapping bandwidths | |
EP2915360B1 (en) | Methods of obtaining measurements in the presence of strong and/or highly varying interference | |
EP3435723B1 (en) | Ue, network node and methods of assisting measurements in mixed signal configuration | |
JP4620157B2 (ja) | 移動局及び移動通信方法 | |
WO2011126015A1 (ja) | 無線基地局、移動局及び通信制御方法 | |
US9456392B2 (en) | Mobile station and communication method | |
US8996006B2 (en) | Mobile station, radio base station, mobile communication system, and mobile communication method | |
WO2011093453A1 (ja) | 移動局及び移動通信方法 | |
JP6073569B2 (ja) | 通信端末及び測定方法 | |
NZ613257B2 (en) | User equipment and measurement method | |
JP2011019287A (ja) | 移動局及び移動通信方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12734020 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2824275 Country of ref document: CA |
|
ENP | Entry into the national phase |
Ref document number: 2012552740 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: MX/A/2013/008057 Country of ref document: MX |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20137018797 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012734020 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2012206093 Country of ref document: AU Date of ref document: 20120111 Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13979176 Country of ref document: US |