WO2012142901A1 - 一种多点协作传输下的干扰测量方法及设备 - Google Patents
一种多点协作传输下的干扰测量方法及设备 Download PDFInfo
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- WO2012142901A1 WO2012142901A1 PCT/CN2012/073199 CN2012073199W WO2012142901A1 WO 2012142901 A1 WO2012142901 A1 WO 2012142901A1 CN 2012073199 W CN2012073199 W CN 2012073199W WO 2012142901 A1 WO2012142901 A1 WO 2012142901A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- 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
- H04B17/345—Interference values
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
- H04L5/0035—Resource allocation in a cooperative multipoint environment
-
- 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
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
-
- 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
-
- 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 signalling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0073—Allocation arrangements that take into account other cell interferences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
Definitions
- the present invention relates to the field of communications, and in particular, to a method and a device for measuring interference in multi-point coordinated transmission.
- each cell typically has one base station in communication with the user equipment.
- the types of user devices include cell phones, laptops, PDAs, and more.
- the base station sends a reference signal (e.g., a pilot signal) to the user equipment, and the user equipment obtains the channel estimation value based on the reference signals.
- the reference signal is a known signal sequence that is transmitted at a specific time and at a specific frequency by reference. The interference and noise factors affect the quality of the channel estimation.
- the data format sent to the user equipment preferably matches the channel conditions of the user equipment.
- the technique of matching the data format sent to the user equipment to its channel conditions is called link adaptation.
- OFDM Orthogonal Frequency Division Multiplexing
- Orthogonal Frequency Division Multiple Access (OFDMA) technology is a multiple access transmission technology of OFDM technology.
- the frequency resources within the system bandwidth are divided into resource blocks of a certain size, and each resource block is the smallest resource unit of resource allocation in the frequency domain.
- the OFDMA system schedules different user equipments to different resource blocks within the system bandwidth to achieve orthogonal transmission between users.
- the third generation of the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) downlink adopts OFDMA technology, and the minimum granularity of resources of each subframe (1ms) in the time domain is OFDM symbols, each There are 12 or 14 OFDM symbols within a subframe. Minimum in the frequency domain The granularity is a subcarrier. The smallest time-frequency unit is defined as a basic resource unit, ie RE (resource element). The minimum resource allocation unit defined by the LTE system is a Physical Resource Block (PRB). A PRB includes REs corresponding to consecutive 12 subcarriers on all OFDM symbols in one subframe. A user equipment may be scheduled to a continuous or discontinuous physical resource block.
- 3GPP 3rd Generation Partnership Project
- LTE Long Term Evolution
- the user equipment needs to report channel quality indication information according to its channel conditions.
- CQI Channel Quality Indicator
- the coordinated multi-point transmission technology refers to cooperation between multiple transmission points separated geographically.
- multiple transmission points refer to base stations of different cells, or may be multiple base stations in the same cell.
- Multi-point coordination Transmission technology is divided into downlink coordinated transmission and uplink joint reception.
- Downlink multipoint coordinated transmission technology solutions are mainly divided into two categories: cooperative scheduling and joint transmission.
- Co-scheduling means that each base station allocates mutually orthogonal resources to different user equipments (UEs) through coordination of time, frequency and space resources between cells to avoid mutual interference.
- the interference of the small interval is the main factor that restricts the performance of the cell edge UE.
- the cooperative scheduling can reduce the interference between the cells, thereby improving the performance of the cell edge UE. For example, referring to FIG. 1, through coordinated scheduling of three cells, The three UEs that may interfere with each other are scheduled to mutually orthogonal resources, effectively avoiding the interference between the cells.
- the joint transmission means that multiple cells simultaneously transmit data to the UE to enhance the received signal of the UE. For example, referring to FIG. 2, three cells transmit data to the same UE on the same resource, and the UE simultaneously receives signals of multiple cells.
- the superposition of useful signals from multiple cells can improve the signal quality received by the UE, and on the other hand, reduce the interference experienced by the UE, thereby improving system performance.
- the user equipment In order to effectively support coordinated multi-point transmission, in addition to the serving cell, the user equipment also needs to estimate channel state information of the coordinated cell base station to the user equipment.
- LTE-A Long Term Evolution-Advanced
- the estimation of channel state information in the LTE-A system is done by measuring pilots; for example, assuming a measurement pilot and data in a PRB.
- the mapping relationship is shown in FIG. 3, in which the first two OFDM symbols are used for control information transmission, and the data region is from the third OFDM symbol.
- the data area includes an RE for transmitting measurement pilots (abbreviated as pilot RE) and an RE for transmitting data (abbreviation, data RE, that is, PDSCH RE shown in FIG. 3).
- the measurement pilots used by neighboring cells are usually mapped to different REs, because usually the power of the pilot REs is higher, and the full-bandwidth transmission is mapped to the measurement pilots on the same RE.
- the interference between them is very strong, affecting the accuracy of the channel estimation. For example, as shown in FIG.
- the user equipment in the cell 1, in order to obtain channel state information of the cell 2 and the cell 3, the user equipment needs to perform channel estimation on the RE corresponding to the measurement pilot in the cell 2 and the cell 3, and in these On the RE, downlink data transmission may be scheduled in the cell 1, for example, the physical downlink shared channel (PDSCH) is used to transmit data, so that the measurement pilots transmitted in the cell 2 and the cell 3 are subject to the cell 1
- PDSCH physical downlink shared channel
- the interference of the data transmission means that although the user equipment is located in the cell 1, the data sent by the cell 1 is still interfered with the channel of the cell 2 and the cell 3 of the user equipment, and therefore, the user equipment in the cell 1
- the received signal strength of the cell 1 is generally much larger than the signal strength of the cell 2 and the cell 3, so that the user equipment obtained in the cell 1 obtains the signal to interference and noise ratio of the measurement pilots of the cell 2 and the cell 3 ( SINR) is very low and satisfactory channel estimation accuracy cannot be obtained.
- the RE of the measurement pilot is sent out in the cell 2 and the cell 3, that is, the data 0 is transmitted.
- This scheme is called RE MUTING, for example, as shown in FIG.
- the REs used by the cell 2 and the cell 3 for transmitting measurement pilots are set to REs of MUTING (hereinafter abbreviated as MUTING RE).
- the user equipment feeds back the channel state information (mainly CQI), it needs to estimate the interference of the neighboring cell received by the serving cell, and in the scheme of the RE MUTING, the interference of the neighboring cell in the measurement pilot of the serving cell is gone ( For example, the RE of the measurement pilot is transmitted in the cell 1, and no data is transmitted in the cell 2 and the cell 3.
- the interference calculated by the user equipment in the serving cell based on the measured pilot position is much lower than the actual interference.
- FIG. 5 and FIG. 6 it is assumed that the three cells shown in FIG. 5 are configured with MUTING RE, and the structure of the measurement pilots of the three cells is as shown in FIG. 6.
- Cell 1 vacates the REs that are "conflicting" with the measurement pilots of cell 2 and cell 3, and does not transmit any data.
- the user equipment in the cell 1 can estimate the channel state of the cell 2 and the cell 3 on the vacant RE, avoiding the interference from the cell 1, and thus the channel estimation accuracy of the user equipment for the cell 2 and the cell 3 is improved.
- This is beneficial for implementing coordinated multi-point (CoMP) transmissions because CoMP transmissions require channel state information from neighboring cells to user equipment.
- CoMP coordinated multi-point
- the interference source it targets may change according to the conversion of the application scenario, including but not limited to the following situations:
- the cells in the measurement set will transmit useful signals to the UE.
- the interference for the UE is only from the outside of the measurement set, and the interference value used by the UE in calculating and feeding back the channel state information should only include the interference of the external cell of the measurement set;
- the UE's transmission scheme can be used in single cell transmission and multiple CoMP transmission.
- the result of the actual scheduling may be that some UEs configured in the CoMP mode need to perform single cell transmission. Therefore, the UE needs to report the CQI of the single cell transmission. At this time, the interference for the UE comes from the serving cell. ⁇
- a coordinated cell that causes strong interference to the UE can avoid interference to the UE in a silent manner, and the quietness of the coordinated cell may cause a relatively large change in the level of interference received by the UE, thereby affecting The accuracy of the CQI estimation, and the UE cannot determine whether the coordinated cell is silent when reporting the CQI. Therefore, it is conservative to calculate and report the CQI for the two interference scenarios.
- Embodiments of the present invention provide a method and a device for measuring interference in a coordinated multi-point transmission, so that the user equipment can accurately face the channel state information corresponding to different interference sources.
- a method for measuring interference in a multi-point coordinated transmission comprising:
- the first device acquires at least two sets of interference measurement REs preset by the user equipment served by the device, where each interference measurement RE set corresponds to one interference source;
- the first device sends configuration information of the at least two interference measurement RE sets to the user equipment, so that the user equipment performs interference measurement according to the obtained at least two sets of interference measurement REs.
- a method for measuring interference in a multi-point coordinated transmission comprising:
- the user equipment receives configuration information of at least two sets of interference measurement REs sent by the first device served by the user equipment, where each interference measurement RE set corresponds to one interference source;
- the user equipment performs interference measurement based on the obtained at least two sets of interference measurement REs.
- a multi-point coordinated measurement device for interference measurement comprising:
- An acquiring unit configured to acquire at least two interference measurement resource element RE sets preset by the user equipment served by the device, where each interference measurement RE set corresponds to one interference source;
- a communication unit configured to send configuration information of the at least two sets of interference measurement REs to the user equipment, and cause the user equipment to perform interference measurement according to the obtained at least two sets of interference measurement REs.
- a multi-point coordinated measurement device for interference measurement comprising:
- a communication unit configured to receive at least two sets of interference measurement REs sent by the first device served by the device Information, wherein each of the interference measurement RE sets corresponds to an interference source;
- a measuring unit configured to perform interference measurement according to the obtained at least two sets of interference measurement REs.
- the network side configures multiple interference measurement RE sets for the user equipment for different interference sources, and instructs the user equipment to select a corresponding interference measurement RE set to perform interference measurement according to the actual application environment, so that Under CoMP transmission, the user equipment can accurately report channel state information under different interference sources according to the network environment, so that the network side can timely grasp the changes of the network environment, thereby adapting to the needs of CoMP transmission, thereby effectively improving system performance.
- FIG. 1 is a schematic diagram of a cooperative scheduling manner in a multipoint coordinated transmission technology in the background art
- FIG. 2 is a schematic diagram of a joint transmission mode in a multipoint coordinated transmission technology in the background art
- FIG. 3 is a schematic diagram of RE configuration under the common scheme in the background art
- FIG. 5 and FIG. 6 are schematic diagrams of a cell distribution and a corresponding RE configuration diagram in the prior art
- FIG. 7 to FIG. 9 are schematic diagrams showing configuration of four interference measurement RE sets according to an embodiment of the present invention.
- FIG. 10 is a flowchart of notifying a user equipment of an interference measurement RE set in a first embodiment of the present invention
- FIG. 11 is a schematic diagram of a RE location included in a subframe according to an embodiment of the present invention
- FIG. 12 is a flowchart of performing interference measurement by a user equipment based on an interference measurement RE set according to an embodiment of the present invention
- FIG. 13 is a schematic structural diagram of a first device according to an embodiment of the present invention
- FIG. 14 is a schematic structural diagram of a function of a user equipment according to an embodiment of the present invention. detailed description
- the first device is pre-provisioned for the user equipment served by the device.
- the user equipment performs interference measurement according to at least two sets of interference measurement REs obtained from the first device, and further reports corresponding channel state information according to the measurement result.
- the method when the first device sets at least two interference measurement RE sets for the user equipment served by the configuration device, the method includes:
- the measurement set includes a first device that sends service data to the user equipment, and at least one second that participates in multi-point coordinated transmission (which may be cooperative scheduling or joint transmission) to the user equipment.
- the device sets at least two sets of interference measurement REs according to various types of interference sources corresponding to the measurement set.
- the user equipment determines that the interference measurement is performed on the REs included in the at least two interference measurement RE sets, that is, the user equipment determines that the first device does not send any data or only sends the REs included in the at least two interference measurement RE sets.
- the pilot is measured, so that the interference measurement can be performed.
- the device may be a base station device that belongs to the same cell or a base station device that belongs to multiple cells.
- the device may be a base station device that belongs to the same cell or a base station device that belongs to multiple cells.
- FIG. 5 only the first device corresponding cell 1 and the second device corresponding to cell 2 and cell 3 are taken as an example for detailed description.
- the first device specifically performs one or any combination of the following operations:
- a corresponding interference measurement RE set according to the RE of the second measurement device in the corresponding measurement set for example, the interference measurement RE set B shown in the figure, also referred to as a Slient RE;
- the corresponding interference measurement RE set is set according to the RE of the at least one second device in the corresponding measurement set not transmitting data, for example, the interference measurement RE set D shown in FIG. 9 is also referred to as Slient RE.
- an interference source corresponds to a set of interference measurement REs.
- the interference source corresponding to the interference measurement RE set A is interference outside the cell 1, the cell 2, and the cell 3 (ie, the measurement set);
- the interference source corresponding to the measurement RE set B is the interference outside the cell 1;
- the interference source corresponding to the interference measurement RE set C is also the interference outside the cell 1, the cell 2, and the cell 3 (ie, the interference outside the measurement set);
- the interference source corresponding to the interference measurement RE set D is the interference outside the cell 1 and the cell 2.
- the interference measurement RE set includes the RE of the measurement pilot transmitted by the local cell, the measurement pilot is normally transmitted, and the interference measurement result is not affected; wherein the measurement pilot that needs to be transmitted refers to the cell 1 (ie, the service) In addition to the measurement pilots in the cell, the measurement pilots in the cell 2 and the cell 3 are also included.
- the measurement pilot of the cell 1 is normally transmitted, and the interference measurement result is not affected;
- the RE used by the cooperative cell to transmit the measurement pilot is set to Silent RE in the cell 1, and the Silent RE is set as the interference measurement RE set, the measurement of the cell 2 and the cell 3 on the RE of the corresponding location
- the frequency is also transmitted normally without affecting the interference measurement results.
- the first device needs to communicate with each device in the measurement set before the configuration, and coordinate the configuration of the interference measurement RE set of each other to ensure the user equipment. Accurate interference measurements can be estimated by measuring the RE set with the interference.
- Step 1000 The first device acquires at least two interference measurement RE sets preset by the user equipment served by the device, where each of the interference measurement RE sets corresponds to one interference source.
- the first device may configure different sets of interference measurement REs for the user equipment for different interference measurement requirements. It is assumed that within the measurement set, the first device corresponds to cell 1 and the two second devices correspond to cell 2 and cell 3, respectively.
- each device in the measurement set corresponds to cell 1, cell 2, and cell 3, respectively.
- the first device configures two sets of interference measurement REs for the user equipment, namely interference measurement RE set A and interference measurement RE set B.
- the interference measurement RE set A the measurement pilot of the first device in the cell 1 is included, and the second device in the cell 2 and the cell 3 respectively configure the Silent RE at the corresponding position, that is, no data is transmitted, therefore,
- the interference measured by the user equipment on the interference measurement RE set A is interference outside the measurement set.
- the interference measurement RE set B the second device in the cell 2 and the cell 3 transmits the downlink data at the corresponding location. Therefore, the interference measured by the user equipment on the interference measurement RE set B is the first device in the cell 1. External interference.
- the second device in the cell 2 and the cell 3 is configured with the Silent RE at the corresponding position, and therefore, the user device measures the thousand on the interference measurement RE set C.
- the disturbance is interference outside the measurement set.
- the UE can obtain the interference outside the measurement set by using the interference measurement RE set A and the interference measurement RE set C.
- the difference between the two is that the interference measurement RE set A includes the measurement pilot of the first device in the cell 1, and the UE needs First, the channel information is estimated according to the pilot signal, and then the received pilot signal is reconstructed, and the reconstructed pilot signal is subtracted from the received signal to obtain a jamming and noise signal, thereby obtaining interference and noise power. It is the interference measurement result.
- the second device in the measurement set does not send any signal, and the UE only needs to calculate the received power on the interference measurement RE set C to obtain the interference and noise power.
- the user equipment may estimate a perturbation autocorrelation matrix or a covariance matrix on the set of interference measurement REs, and calculate the CQI using the correlation matrix or the covariance matrix.
- the second device in the cell 2 is configured with Silent RE at the corresponding location, and the second device in the cell 3 normally transmits data at the corresponding location, so the user equipment is interfering.
- the interference measured by the RE set D is measured as interference other than the second device in the cell 1 and the cell 2.
- FIG. 7 to FIG. 9 only part of the figure corresponding to the cell 1 is for the RE configuration information of the user equipment in the cell 1, and the corresponding parts corresponding to the cell 2 and the cell 3 are the cell 2 and the cell 3, respectively.
- the RE configuration information of the internal user equipment is placed here for a clearer comparison.
- each interference measurement RE set includes, in addition to the location and number of REs in the subframe, In addition to the number of groups, it should also include periods, sub-frame offsets, and so on.
- the period and offset values of different sets of interference measurement REs may be the same or different. If the period and offset values are the same, the different interference measurement RE sets are different in the subframe, and a set of interference measurement REs may be in one There are multiple sub-frames in the period, that is, there may be multiple sub-frame offset values, and the positions of the set of interference measurement REs in different sub-frames in one period may be the same or different.
- Step 1010 The first device sends the obtained configuration information of the at least two interference measurement RE sets to the user equipment, so that the user equipment performs interference measurement according to the obtained at least two interference measurement RE sets.
- the first device may notify the user equipment of the location of the interference measurement RE set in the subframe by means of a bitmap; the RE is configured in one subframe as an example, refer to FIG. 11 Shown as follows:
- All available REs in a sub-frame are divided into a plurality of RE groups, and REs of the same label are a group.
- REs of the same label are a group.
- four REs labeled "1" are a group, so that the available REs are divided into 6 groups;
- 1 bit is used to indicate whether each group of REs belongs to the set of interference measurement REs. Therefore, 6 bits are required to indicate the position of the interference measurement RE set in the subframe, for example, 6 bits are respectively ⁇ 0, 1, 1, 0, 0 , 0 ⁇ , the 4 REs with the identifier "1" and the 4 REs with the label "2" belong to a currently configured set of interference measurement REs; of course, the first device can also be notified by numbering.
- the interference measurement RE gathers the position within the subframe. For example, as shown in Figure 7, assuming that only one RE group is allowed in a set of interference measurement REs, the first device only needs to indicate the number of the RE group by 3 bits. In practical applications, the number of REs, the location, and the number of groups included in each collection can be flexibly optimized according to the application environment, and will not be described here.
- the configuration of the interference measurement RE set may refer to the configuration information of the MUTING RE.
- the RE included in the interference measurement RE set may be a subset of the MUTING RE, and at this time, the interference measurement RE set is in the sub-
- the position within the frame can be determined by bitmap or numbering within the MUTING RE, and will not be described here.
- the first device may adopt the following three modes (including but not limited to): 1. After the first device sends configuration information of the at least two types of interference measurement RE sets to the user equipment, The user equipment does not need to immediately perform interference measurement according to the received interference measurement RE set, but the first device sends an indication to the user equipment according to the measurement requirement, thereby notifying the user equipment in the at least two sets of interference measurement REs obtained by the user equipment. , Select some or all of the interference measurement RE sets for interference measurement.
- the first device may use the high-level signaling to indicate to the user equipment the set of the interference measurement REs that are actually used for the interference measurement, and specifically: the first device carries the indication by using the high-level signaling according to the current transmission mode of the user equipment.
- the interference measurement RE set index ie, the set number
- the user equipment learns the set of interference measurement REs actually used for the interference measurement according to the index. For example, if the current transmission mode of the user equipment is JT (Joint Transmission), the first device indicates that the user equipment is used, and the interference measurement RE set of the interference outside the measurement set may be measured. If the current transmission mode of the user equipment is coordinated scheduling (CS/CB), the first device instructs the user equipment to use, and can measure the interference measurement RE set of the interference of the cell that does not perform interference coordination; Such a push is not repeated here.
- CS/CB coordinated scheduling
- the first device may also use a Physical Downlink Control Channel (PDCCH) signaling to indicate to the user equipment the set of interference measurement REs actually used for the interference measurement, specifically: the first device may be in the PDCCH.
- PDCCH Physical Downlink Control Channel
- DCI Downlink Control Information
- bit map is used to indicate the set of interference measurement REs that are actually used for interference measurement. For example, if the first device configures four sets of interference measurement REs for the user equipment, four methods are adopted by the bitmap method. The bits indicate, respectively, whether each set of interference measurement REs is actually used for interference measurements.
- the user equipment After the first device sends the configuration information of the at least two interference measurement RE sets to the user equipment, the user equipment does not need to immediately perform interference measurement according to the obtained interference measurement RE set, but the user equipment agrees with the network side according to the network side. In a manner, in the set of at least two interference measurement REs obtained, a part or all of the interference measurement RE sets are selected for the interference measurement.
- the specific operation mode of the user equipment is further described in detail in the subsequent process.
- the user equipment After the first device sends the configuration information of the at least two types of interference measurement RE sets to the user equipment, the user equipment does not need to immediately perform interference measurement according to the obtained interference measurement RE set, but the user equipment is pre-configured according to the local device. In the manner in which at least two sets of interference measurement REs obtained are selected, part or all of the interference measurement RE sets are selected for interference measurement. The specific operation mode of the user equipment is further described in detail in the subsequent process.
- the detailed process of the user equipment performing interference measurement based on the set of interference measurement REs is as follows:
- Step 1200 The user equipment receives configuration information of at least two interference measurement RE sets sent by the first device served by the user equipment, where each of the interference measurement RE sets corresponds to one interference source.
- the set of interference measurement REs configured by the first device for the user equipment is still taken as an example of the four cases shown in FIG. 7 - FIG.
- the measurement device includes a first device corresponding to the cell 1, and a second device corresponding to the cell 2 and the cell 3.
- the first device configures two sets of interference measurement REs for the user equipment, namely interference measurement RE set A and interference measurement RE set B.
- interference measurement RE set A the measurement pilot of the first device in the cell 1 is included, and the second device in the cell 2 and the cell 3 respectively configure the Silent RE at the corresponding position, that is, no data is transmitted, therefore, the user
- the interference measured by the device on the interference measurement RE set A is the interference outside the measurement set.
- the interference measurement RE set B the second device in the cell 2 and the cell 3 transmits the downlink data at the corresponding location. Therefore, the interference measured by the user equipment on the interference measurement RE set B is the first device in the cell 1. Interference outside.
- the second device in the cell 2 and the cell 3 respectively correspond to The Silent RE is configured in the location, so the interference measured by the user equipment on the interference measurement RE set C is interference outside the measurement set.
- the second device in the cell 2 is configured with Silent RE at the corresponding location, and the second device in the cell 3 normally transmits data at the corresponding location, so the user equipment is in the thousand
- the disturbance measured by the disturbance measurement RE set D is a disturbance other than the second device in the cell 1 and the cell 2.
- Step 1210 The user equipment performs interference measurement according to the obtained at least two interference measurement RE sets.
- the user equipment when performing step 1210, adopts the following three execution modes (including but not limited to):
- the user equipment After receiving the configuration information of the at least two interference measurement RE sets sent by the first device, the user equipment obtains at least two types of interference measurement REs according to the indication when receiving the indication sent by the first device according to the measurement requirement In the set, select some or all of the interference measurement RE sets for interference measurement.
- the indication received by the user equipment may be the high layer signaling sent by the first device, where the high layer signaling carries a number of bits indicating the interference measurement RE set index (ie, the set number) actually used for the interference measurement, and the user Based on this index, the device knows the set of interference measurement REs actually used for the interference measurement.
- the indication received by the user equipment may also be the PDCCH signaling sent by the first device, and the number of bits added in the DCI carried in the PDCCH signaling indicates an index of the set of interference measurement REs actually used for interference measurement.
- the set of interference measurement REs actually used for interference measurement is indicated by means of a bitmap, and the user equipment can thereby obtain the set of interference measurement REs used for actually performing interference measurement.
- the user equipment After receiving the configuration information of the at least two interference measurement RE sets sent by the first device, the user equipment selects part or all of the obtained at least two types of interference measurement RE sets according to a manner agreed in advance by the local network and the network side.
- the interference measurement RE set performs interference measurement.
- the user equipment and the network side agree that the user equipment determines the set of interference measurement REs actually used for the interference measurement according to the CQI reference resources configured on the local or network side, specifically:
- the user equipment acquires a CQI reference resource configured by the local preset or the network side, where the CQI reference resource includes a set of the interference measurement RE set;
- the user equipment determines whether at least one of the at least two interference measurement RE sets obtained from the first device is included in the CQI reference resource, and if yes, the user equipment determines the interference measurement RE set included in the CQI reference resource to be actually used for the thousand Interference measurement of the interference measurement RE set; otherwise, the user equipment determines the set of interference measurement REs closest to the CQI reference resource in the set time as the interference measurement RE set actually used for the interference measurement; for example, the user equipment and the network side Conventionally, in at least two sets of interference measurement REs obtained from the first device, According to the set period, each set of interference measurement REs is sequentially selected as the set of interference measurement REs actually used for interference measurement.
- the user equipment can periodically transform the interference measurement RE set to perform interference measurement. If the first device indicates N interference measurement RE sets, the user equipment polls the interference measurement using the set of interference measurement REs and reports the interference measurement. Therefore, the interference measurement results for various interference sources can be obtained, so that the network side can know the interference magnitude of the interference source corresponding to each set of interference measurement REs, and the interference situation of the network side to the network environment is more comprehensive. Know.
- the user equipment may perform interference measurement on the interference measurement RE set actually used for the interference measurement selected by the first and second modes, and obtain corresponding channel state information according to the interference measurement result (eg, I + N0 ) (eg, CQI). ), and report the channel status information to the network side.
- the interference measurement result eg, I + N0
- CQI channel state information
- the user equipment can also perform interference measurement on the obtained at least two sets of interference measurement REs, and according to the interference corresponding to the set of interference measurement REs actually used for interference measurement selected in the first and second modes.
- the measurement result obtains corresponding channel state information, and the channel state information is 4 ⁇ to the network side; for example, the user equipment performs interference measurement for all the interference measurement RE sets, and actually calculates information such as CQI used for feedback.
- the interference measurement amount to be used is selected according to the first and second modes.
- the user equipment After receiving the configuration information of the at least two interference measurement RE sets sent by the first device, the user equipment selects some or all of the interference measurement RE sets in the obtained at least two interference measurement RE sets according to the locally pre-configured manner. Perform a disturbance measurement.
- the user equipment obtains at least two sets of interference measurement REs as the interference measurement actually used for the interference measurement; that is, the user equipment performs interference measurement on all the obtained interference measurement RE sets.
- the user equipment may obtain corresponding channel state information according to the interference measurement result that represents the largest or smallest interference, and the corresponding channel state information is obtained.
- the channel state information is reported to the network side; or, the average value of each obtained interference measurement result is calculated, and corresponding channel state information is obtained according to the average value, and the channel state information is uploaded to the network side; or Among the obtained interference measurement results, one is selected arbitrarily to obtain corresponding channel state information, and the channel state information is uploaded to the network side.
- the user equipment After receiving the configuration information of the at least two interference measurement RE sets sent by the first device, the user equipment selects part or all of the interference measurement RE sets to perform the interference measurement according to the corresponding relationship between the pre-configured CQI and the interference measurement RE set. .
- the user equipment uses the interference measurement RE set to perform interference measurement, and uses the obtained interference estimation value to calculate the corresponding CQI and uplink.
- the network side can configure the user equipment to report multiple CQIs. Each CQI corresponds to a set of interference measurement REs.
- the user equipment estimates interference on different sets of interference measurement REs to calculate the corresponding CQI.
- Multiple CQIs may correspond to the same set of interference measurement REs.
- the correspondence between the multiple CQIs and the multiple interference measurement RE sets may be preset or configured by the network side to the user equipment.
- the first device includes an obtaining unit 130 and a communication unit 131.
- the acquiring unit 130 is configured to obtain at least two sets of interference measurement resource elements RE preset by the user equipment served by the device, where each interference measurement RE set corresponds to one interference source;
- the communication unit 131 is configured to send configuration information of the at least two interference measurement RE sets to the user equipment, and enable the user equipment to perform interference measurement according to the obtained at least two interference measurement RE sets.
- the first device further includes a setting unit 132, configured to preset at least two sets of interference measurement REs for the user equipment served by the first device.
- the user equipment includes a communication unit 140 and a measurement unit 141.
- the communication unit 140 is configured to receive configuration information of at least two sets of interference measurement REs sent by the first device served by the user equipment, where each interference measurement RE set corresponds to one interference source;
- the measuring unit 141 is configured to perform interference measurement according to the obtained at least two interference measurement RE sets.
- embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
- computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the device is implemented in a flow or a flow or a block diagram of a block or multiple The function specified in the box.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020137031051A KR20140009522A (ko) | 2011-04-22 | 2012-03-28 | 협력 멀티 포인트 전송에서의 간섭측정 방법 및 장치 |
| US14/113,217 US9775059B2 (en) | 2011-04-22 | 2012-03-28 | Method of and apparatus for interference measurement in coordinated multipoint transmission |
| EP12773763.3A EP2701423B1 (en) | 2011-04-22 | 2012-03-28 | Method and device for measuring interference in coordinated multipoint transmission |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110102149.7 | 2011-04-22 | ||
| CN201110102149.7A CN102149124B (zh) | 2011-04-22 | 2011-04-22 | 一种多点协作传输下的干扰测量方法及设备 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012142901A1 true WO2012142901A1 (zh) | 2012-10-26 |
Family
ID=44423057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| PCT/CN2012/073199 Ceased WO2012142901A1 (zh) | 2011-04-22 | 2012-03-28 | 一种多点协作传输下的干扰测量方法及设备 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9775059B2 (zh) |
| EP (1) | EP2701423B1 (zh) |
| KR (1) | KR20140009522A (zh) |
| CN (1) | CN102149124B (zh) |
| WO (1) | WO2012142901A1 (zh) |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2701423A4 (en) | 2014-11-05 |
| US20140066116A1 (en) | 2014-03-06 |
| US9775059B2 (en) | 2017-09-26 |
| EP2701423B1 (en) | 2018-05-02 |
| EP2701423A1 (en) | 2014-02-26 |
| KR20140009522A (ko) | 2014-01-22 |
| CN102149124B (zh) | 2014-08-06 |
| CN102149124A (zh) | 2011-08-10 |
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