WO2012031565A1 - 一种测量干扰的方法、系统和设备 - Google Patents
一种测量干扰的方法、系统和设备 Download PDFInfo
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- WO2012031565A1 WO2012031565A1 PCT/CN2011/079518 CN2011079518W WO2012031565A1 WO 2012031565 A1 WO2012031565 A1 WO 2012031565A1 CN 2011079518 W CN2011079518 W CN 2011079518W WO 2012031565 A1 WO2012031565 A1 WO 2012031565A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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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
- 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
Definitions
- Each cell in a wireless cellular network system typically has one base station in communication with the user terminal.
- the base station transmits a reference signal (i.e., a pilot signal) to the user terminal, and the user terminal obtains a channel estimation value based on the reference signals.
- the reference signal is a known sequence of signals that are transmitted at a specific frequency, at a specific time. Factors such as interference and noise can affect the quality of the channel estimate.
- the data format sent to the user terminal preferably matches the channel conditions of the user terminal.
- the technique that matches the data format sent to the user terminal to its channel conditions is called link adaptation.
- the user terminal needs to report channel quality indication information (CQI) according to its channel condition.
- CQI channel quality indication information
- the CQI reported by the user terminal corresponds to a certain time-frequency resource, that is, the CQI reported by the user terminal indicates the transmission capability on the time-frequency resources.
- the calculation of CQI requires the user terminal to measure the interference and noise of the neighboring cells it receives, including interference I and noise power N0.
- ITU International Telecommunication Union
- Multipoint coordinated transmission technology is the collaboration between multiple transmission points separated geographically. In general, multiple transmission points are base stations of different cells. Multi-point coordinated transmission technology is divided into downlink coordinated transmission and uplink joint reception. Downlink multipoint coordinated transmission technology solutions are mainly divided into two categories: joint scheduling and joint transmission.
- Joint scheduling is to allocate mutually orthogonal resources to different UEs (terminals) by coordinating 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 UE at the cell edge. Therefore, joint scheduling can reduce the interference between cells, thereby improving the performance of the cell edge UE.
- FIG. 1A through the joint scheduling of three cells, three UEs that may interfere with each other are scheduled to mutually orthogonal resources, thereby effectively avoiding interference between cells.
- the joint scheduling scheme Different from the joint scheduling scheme, only one cell sends data to the UE.
- multiple cells simultaneously send data to the UE to enhance the UE receiving signals.
- three cells transmit data to one 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 terminal needs to estimate the channel state information of the coordinated cell base station to the terminal.
- Channel state information estimation in LTE-A is done by measuring pilots.
- FIG. 3 the relationship between pilot and data in a PRB (Physical Resource Block) is shown.
- the first two OFDM (Orthogonal Frequency Division Multiplexing) symbols are used to control the transmission of information, starting from the third OFDM symbol.
- the data area includes a pilot RE (Resource Element) and a data RE.
- the pilots of neighboring cells are usually mapped to different REs.
- the terminal in the cell 1 needs to obtain channel state information of the cell 2 and the cell 3, and needs to perform channel estimation on the RE corresponding to the measurement pilot of the cell 2 and the cell 3.
- downlink data transmission such as PDSCH (Physical Downlink Shared Channel)
- PDSCH Physical Downlink Shared Channel
- the received signal strength of the cell 1 is usually much larger than the signal strength of the cell 2 and the cell 3, so that the signal-to-interference ratio (SINR) of the measurement pilots of the cell 2 and the cell 3 is very low. , Satisfactory channel estimation accuracy cannot be obtained.
- cell 1 can vacate those REs that transmit measurement pilots in cell 2 and cell 3, that is, transmit a zero-power signal. This scheme is called RE MUTING, and the vacant RE is called a silent RE (MUTING). RE), see Figure 1D for details.
- the terminal feedback CQI needs to estimate the interference it is subjected to.
- the interference of the neighboring cell is no longer at the pilot position. Since the interference of neighboring cells is usually the strongest, the interference estimated at the pilot position is much lower than the actual interference.
- the embodiment of the invention provides a method, a system and a device for measuring interference, which are used to solve the problem that the interference precision measured by the terminal is relatively low if the RE MUTING scheme is used in the prior art.
- the network side device determines the configuration information of the first resource unit RE group that performs the interference measurement; the network side device generates the first interference notification information according to the configuration information of the first RE group, and sends the first interference notification to the terminal. And the information is used to instruct the terminal to determine the first RE group according to the first interference notification information, and perform interference measurement on the determined first RE group.
- the terminal determines to perform the dry according to the received first interference notification information from the network side device.
- the terminal performs interference measurement on the determined first RE group.
- a configuration information determining module configured to determine configuration information of a first RE group that performs interference measurement
- a generating module configured to generate first interference notification information according to configuration information of the first RE group
- a sending module configured to send to the terminal
- the first interference notification information is used to indicate that the terminal determines the first RE group according to the first interference notification information, and performs interference measurement on the determined first RE group.
- a location determining module configured to determine, according to the received first interference notification information from the network side device, a location of the first RE group that performs interference measurement
- a measuring module configured to perform interference measurement on the determined first RE group.
- a network side device configured to determine configuration information of the first RE group that performs the interference measurement, generate first interference notification information according to the configuration information of the first RE group, and send the first interference notification information to the terminal;
- the terminal is configured to determine, according to the received first interference notification information from the network side device, a location of the first RE group that performs interference measurement, and perform interference measurement on the determined first RE group.
- the notification terminal performs interference measurement on the first RE group, the interference precision of the measurement is improved when the RE MUTING scheme is used;
- the terminal determines the CQI by using the interference determined by the embodiment of the present invention, the accuracy of the CQI can be improved, thereby enabling the base station to better implement link adaptation, thereby improving the efficiency of data transmission.
- 1A is a schematic diagram of joint scheduling in the background art
- FIG. 1B is a schematic diagram of coordinated transmission in the background art
- FIG. 1C is a schematic diagram of a mapping relationship of pilot domain data in the background art
- Figure 1D is a schematic diagram of RE MITTING
- FIG. 2 is a schematic structural diagram of a system for measuring interference according to an embodiment of the present invention.
- FIG. 3 is a schematic structural diagram of a network side device according to an embodiment of the present invention.
- FIG. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
- FIG. 5 is a schematic flowchart of a method for measuring interference according to an embodiment of the present invention.
- FIG. 6 is a schematic flowchart of a second method for measuring interference according to an embodiment of the present invention.
- FIG. 7 is a schematic diagram of an application scenario according to an embodiment of the present invention.
- FIG. 8 is a schematic diagram of grouping according to an embodiment of the present invention.
- FIG. 9 is a schematic diagram of a first pilot domain data mapping relationship according to an embodiment of the present invention.
- FIG. 10 is a schematic diagram of a second pilot domain data mapping relationship according to an embodiment of the present invention.
- FIG. 11 is a schematic flowchart of a method for performing interference by using a MUTING RE according to an embodiment of the present invention. detailed description
- the network side device generates the first interference notification information according to the configuration information of the first RE group that performs the interference measurement, and sends the first interference notification information to the terminal.
- the terminal determines, according to the first interference notification information, the interference measurement. The location of an RE group, and interference measurements on the determined first RE group. Since the notification terminal performs interference measurement on the first RE group, the interference accuracy of the measurement is improved when the RE MUTING scheme is used.
- RE MUTING in the background art is only a name, and other schemes other than RE MUTING are also applicable to the embodiment of the present invention. That is to say, the first RE group in the embodiment of the present invention is a MUTING RE group, and may also be another RE group having the same function but the same function as the MUTING RE.
- the system for measuring interference includes: a network side device 10 and a terminal
- the network side device 10 is configured to determine configuration information of the first RE group that performs interference measurement, according to The determined configuration information of the first RE group generates first interference notification information, and sends the first trunk 4 notification information to the terminal 20.
- the terminal 20 is configured to determine, according to the received first interference notification information from the network side device 10, a location of the first RE group that performs interference measurement, and perform interference measurement on the determined first RE group.
- each subframe has multiple REs, and multiple REs can be selected from all REs and divided into multiple RE groups. For example, as shown in Figure 8, a total of 24 REs in two rows are divided into 6 groups, that is, a group marked with "0", a group labeled "1", and so on.
- the specific grouping situation can be determined in the agreement or negotiated between the network side and the terminal side.
- the divided multiple RE groups may be updated as needed, for example, the number of selected REs, the RE location, the number of divided RE groups, the location of the RE group, and the number of REs included in the RE group.
- the location is updated.
- the specifically updated packet situation may be determined in the protocol or negotiated between the network side and the terminal side.
- the RE group here may or may not include the RE occupied by the measurement pilot of the serving cell.
- the network side device 10 selects a plurality of groups that need to be silent (ie, a group consisting of MUTING REs in the background art) from the group of REs to form an RE group set, and select at least one group of REs from the RE group set.
- the first RE group that is, the RE group set is composed of all silent RE groups.
- the number of RE groups in the RE group set may be more than the number of RE groups occupied by the pilots of the coordinated transmission cell of the terminal. For example, only the REs of the first group and the second group may be needed, and the REs of the UE MUTING may be actually notified to be the first group and the second group, or the first, second, and third groups may be notified, so that an extra group of REs is used.
- the help terminal 20 performs interference estimation.
- the additional RE group may be used as the first RE group.
- the cell 1 notifies the terminal RE group set to the ⁇ 1, 2, 3 ⁇ group (corresponding to the group number in FIG. 8), wherein the first group and the second group are for better estimation of the cell 2 and the cell 3
- the channel (ie, the second RE group), and the third group of REs are for estimating interference (ie, the first RE group); the terminal is capable of detecting the interference generated by the PDSCH of the two adjacent cells on the third group of REs.
- the terminal may be configured to estimate interference on a specific RE group according to the location of the terminal.
- terminal 1 in Figure 7 is located at the edge of cells 1 and 2
- terminal 3 is located at the center of cell 1
- terminal 2 is located at the edge of cells 1 and 3.
- the network side device notifies the terminal 2 to measure the interference on the first group RE, because the terminal 2 is located at the edge of the cell 1 and the cell 3, and the cell 1 and the cell 3 may participate in the joint transmission to the UE 2, and the signal of the cell 3 is not connected to the terminal 2 at this time.
- the interference is further, and the signal of the cell 2 is negligible due to the serious attenuation, so that the terminal 2 can relatively accurately estimate the interference received during the joint transmission. If the terminal 2 only performs single-cell transmission, the signal of the cell 3 is still interfered with the terminal. At this time, the network-side device can configure the terminal 2 to measure interference on the second group RE, and the terminal 2 can still detect that the interference is large. Interference of cell 3.
- the signals of terminal 3, cell 2 and cell 3 to UE3 located in the center of cell 1 are relatively weak, so the interference measured on the first group (or group 2) RE can accurately reflect that the terminal is transmitting in a single cell. The interference experienced, see Figure 10.
- the network side device 10 determines the first RE group for performing interference measurement according to the location of the RE group set of the neighboring cell or according to the location or random selection of the terminal.
- the configuration information of each first RE group can be determined.
- the configuration information of the RE group includes but is not limited to one or more of the following information:
- the pilot mode refers to the RE position occupied by the pilot transmitted by the cell in one subframe.
- the network side device 10 to generate the first interference notification information according to the determined configuration information of the first RE group, and several types are listed below:
- Method 1 The network side device 10 determines the measurement set information, and uses the determined measurement set information as the first interference notification information.
- the second RE group is the RE group used for measuring the channel of the neighboring cell, and the cells corresponding to the different second RE groups are different, so the second RE may be used.
- the configuration information corresponding to the group and the cell identifier of the corresponding cell are placed in the measurement set information; and the first RE group also has configuration information, but there is no corresponding cell, so the virtual small can be used.
- the area identifier is used as the cell identifier corresponding to the first RE group.
- LTE defines a total of 504 physical layer cell identifiers, which requires a 9-bit identifier.
- the identifier of 504 ⁇ 511 can be used as the virtual cell identifier, and then the configuration information of the first RE group is used. And the corresponding virtual cell identifier is placed in the measurement set information. That is, the measurement set information includes configuration information of each second RE group in the RE group set and a cell identifier of a cell corresponding to each second RE group, and configuration information of each first RE group and each first The virtual d and area ID corresponding to the RE group.
- the terminal 20 determines the configuration information of the first RE group included in the measurement set information according to the virtual cell identifier corresponding to the first RE group, and determines the first RE according to the determined configuration information. The location of the group.
- the terminal 20 checks the corresponding cell identifier, finds the configuration information corresponding to the virtual cell identifier, uses the configuration information as the configuration information of the first RE group, and then knows the period of the first RE group according to the configuration information.
- the frame offset and its position in the subframe is the same.
- the measurement set information may also have no configuration information of each first RE group and a virtual cell identifier corresponding to each first RE group, and only includes configuration information of each second RE group and a cell corresponding to each second RE group. Cell identification. In this way, the configuration information of the first RE group of the terminal 20 can be implicitly notified. However, before applying the implicit notification, the network side device 10 needs to send configuration information of each RE group in the RE group set to the terminal.
- the terminal 20 receives the configuration information of each RE group in the RE group set from the network side device, so that the configuration information of all RE groups in the RE group set is known, and then all non-second REs are searched from the RE group set.
- the group that is, the set of the RE group, but not the second group of the RE
- the RE group that is found is the first RE group
- the configuration information corresponding to the first RE group is determined from the configuration information of all the RE groups in the set of the RE group.
- the period of the first RE group, the subframe offset, and its position in the subframe are determined according to the determined configuration information.
- the network side device 10 determines the interference measurement indication information corresponding to the configuration information of the first RE group according to the correspondence between the configuration information and the interference measurement indication information, and uses the determined interference measurement indication information as the first interference notification information.
- the terminal 20 determines configuration information of the first RE group according to the interference measurement indication information, where The location of the first RE group is determined based on the determined configuration information.
- the interference measurement indication information is determined by the network side device 10 in a bitmap manner; or the interference measurement indication information is determined by the network side device 10 according to the number of the first RE group, for example, directly notifying the terminal of the specific first RE group number, If the terminal needs to perform measurement interference on the nth RE group, the terminal may be directly notified to n; or
- the interference measurement indication information is determined by the network side device 10 according to the configuration information of the first RE group; or
- the interference measurement indication information is determined by the network side device 10 according to the configuration information of the first RE group and the virtual cell identifier corresponding to the first RE group.
- the network side device 10 may send the RE group set to the terminal 20.
- the configuration information of each RE group or the configuration information of the first RE group is sent to the terminal 20, and then the corresponding interference measurement indication information is determined according to the location of each RE group.
- the network side device 10 can also directly send the configuration information of the first RE group to the terminal 10, so that the terminal 10 can further determine the location of the first RE group, and the terminal 10 directly receives the configuration information of the first RE group to perform the first RE group. Location is determined.
- the interference measurement indication information is determined by the network side device 10 by means of a bitmap.
- the third group is the first RE group, where "0" indicates that the corresponding RE group is not the first RE group, and "1" indicates that the corresponding RE group is the first RE group, and the interference measurement indication information is ⁇ 0, 0, 0. , 1, 0, 0 ⁇ , where each bit corresponds to one RE. If the 0th group RE is the RE occupied by the measurement pilot of the cell 1, it will be notified by other signaling.
- the interference measurement information sent to the terminal can remove the corresponding bit of the 0th group and compress it into 5 bits, that is, ⁇ 0, 0, 1, 0, 0 ⁇ , where the first bit corresponds to the first group, the second bit. Corresponding to the second group, and so on.
- the terminal 20 determines the first RE group according to the bitmap manner according to the configuration information of all the RE groups in the RE group set received from the network side device 10, and determines the first information from the configuration information of the RE group. Configuration information of an RE group.
- the terminal 20 searches for a corresponding RE group from all RE groups, and determines that the third group corresponds to "1", and knows that the third group is the third group.
- An RE group searching for configuration information of the third group from configuration information of all RE groups in the RE group set, and determining a period, a subframe offset, and a position in the subframe of the first RE group according to the found configuration information. .
- the interference measurement indication information is determined by the network side device 10 in a bitmap manner.
- the interference measurement indication information is determined by the network side device 10 in a bitmap manner.
- the third group in the cell 1 is the first RE group, and the "0" indicates that the corresponding RE group is not the first RE group.
- "" indicates that the corresponding RE group is the first RE group, and the interference measurement indication information is ⁇ 0, 0, 1), where each bit corresponds to a group of REs, and the corresponding mode may be specified in the protocol or may be determined by the network side and the terminal side. If the network side device 10 sends the configuration information of all the RE groups in the RE group set to the terminal, Then the RE groups in the RE group set need to be numbered in a determined order.
- the terminal 20 receives the configuration information of all RE groups in the RE group set from the network side device 10, determines the first RE group from the RE group set according to the bitmap manner, and selects all the RE groups in the received RE group set. In the configuration information, determine the configuration information of the first RE group.
- the terminal 20 searches for the corresponding RE group from the RE group set, determines that the third group corresponds to "1", and knows that the three groups are the first RE group, and then receives the The configuration information of the third group is found in the configuration information of all the RE groups in the RE group set, and the period of the first RE group, the subframe offset, and the position in the subframe are determined according to the found configuration information.
- the bitmap information or the number information of the RE group may be sent to the terminal through high layer signaling or sent to the terminal through physical layer signaling.
- the interference measurement indication information is determined by the network side device 10 according to the configuration information of the first RE group (that is, the configuration information of the first RE group is used as the interference measurement indication information), or according to the configuration information of the first RE group and the first RE group.
- the corresponding virtual cell identifier is determined (that is, the configuration information of the first RE group and the virtual cell identifier corresponding to the first RE group are used as the interference measurement indication information), and the configuration information of the first RE group is sent to the terminal 20, so The configuration information of each RE group in the RE group set is transmitted to the terminal 20.
- the terminal 20 after receiving the configuration information of the first RE group (or separately receiving the configuration information of the first RE group and the virtual cell identifier corresponding to the first RE group), the terminal 20 knows that the RE group corresponding to the configuration information is The first RE group, and determining the location of the first RE group according to the configuration information.
- the interference measurement indication information in the embodiment of the present invention is not limited to the above four types, and other content that enables the terminal to determine the configuration information of the first RE group can be used as the interference measurement indication information in the embodiment of the present invention.
- the network side device 10 needs to send the measurement set information and the interference measurement indication information to the terminal 20, for example, the measurement set information including only the configuration information of each second RE group and the cell identity of the cell corresponding to each second RE group is transmitted.
- the measurement indication information is transmitted, and the measurement set information and the interference measurement indication information may be transmitted together or separately.
- the network side device 10 can send the configuration information of each RE group in the RE group set or only the configuration information of the first RE group to the terminal 20 regardless of the manner.
- the location information in the subframe is included in the configuration information
- the location information may also be determined by using a bitmap. For example, according to Figure 8, there are 6 groups, which requires 6-bit position information. Assume that Group 1 and Group 2 are silent RE groups, “0" means that the corresponding RE group is not a silent RE group, and “1” means that the corresponding RE group is a silent RE group, and the position information is ⁇ 0, 1, 1, 0, 0, 0 ⁇ , where each is determined by negotiation.
- location information in addition to the bitmap mode, other information capable of determining the location may also be used as location information, such as number information, in the embodiment of the present invention.
- the network side device 10 after determining that the terminal 20 needs to perform interference measurement on the first RE group, the network side device 10 generates first interference notification information according to the determined configuration information of the first RE group.
- the network side device 10 determines the second interference notification information after determining that the terminal 20 does not need to perform interference measurement on the first RE group, the second interference notification information is sent to the terminal, and the terminal is instructed to perform interference measurement according to the CRS and/or the measurement pilot. .
- the second RE group occupies all possible RE groups, and cannot find a suitable RE group for the terminal to estimate interference; or In order to control the overhead, the introduction of an additional first RE group adds overhead; or
- the terminal can accurately estimate interference based on CRS and/or measurement pilots.
- the second interference notification information is determined by the network side device 10 in a bitmap manner; or the second interference notification information is determined by the network side device 10 according to the virtual cell identifier.
- the interference measurement indication information described above can be utilized. Specifically, it can be determined by 2 bits, assuming that the first bit of 2 bits corresponds to the CRS, the second bit corresponds to the measurement pilot, "0" represents no, "1" represents no, if the terminal is required to perform interference measurement according to the CRS, then 2 The bit is 10; if the terminal is required to perform interference measurement according to the measurement pilot, 2 bits are 01; if the terminal is required to perform interference measurement according to CRS (Common Pilot) and measurement pilot, 2 bits are 11.
- CRS Common Pilot
- the interference measurement indication information it is also possible to add 2 bits to the interference measurement indication information, so that the first interference notification information and the second interference notification information can be made into one interference notification information. For example, if the interference measurement indication information requires 6 bits, then 2 bits can be added at the end, and the measurement information is 8 bits. If it is determined that the terminal 20 is required to perform interference measurement on the first RE group, the first 6 bits of the interference measurement indication information are determined according to the bitmap, and the last 2 bits are all 0; if it is determined that the terminal 20 is not required to perform interference on the first RE group For measurement, the first 6 bits of the interference measurement indication information are all 0, and the last 2 bits are determined as needed.
- the terminal 20 receives the 2-bit information, it knows that the interference measurement is not performed on the first RE group, and then according to the specific bit value, it is known by what way to interfere with the measurement; if the terminal 20 receives the interference measurement indication information, and the interference measurement If the last 2 bits of the indication information are not all 0, it is known that the interference measurement is not performed on the first RE group, and then according to the specific bit value, it is known how to interfere with the measurement.
- a corresponding virtual cell identifier may be directly sent, for example, the CRS corresponding to the virtual cell identifier, and the measurement pilot corresponding to the virtual cell identifier, if received, Then, it is known that CRS is used for interference measurement; if ⁇ is received, it is known that the measurement pilot is used for interference measurement; if ⁇ and ⁇ are received, it is known that CRS and measurement pilot are used for interference measurement.
- All the information sent by the network side device 10 to the terminal 20 can pass the high layer signaling. Sent as RRC signaling.
- the terminal 20 When the terminal 20 performs interference measurement on the determined first RE group, the average received power value on the first RE group can be determined, and the determined average power value is taken as the interference estimation value.
- the network side device 10 of the embodiment of the present invention may be a base station (such as a macro base station, an evolved base station, a home base station, etc.), or may be an RN (relay) device, or may be other network side devices.
- a base station such as a macro base station, an evolved base station, a home base station, etc.
- RN relay
- the method for measuring interference, the network side device, and the terminal are also provided in the embodiment of the present invention. Since the principles of solving the problem by the methods and devices are similar to the system for measuring interference in the embodiment of the present invention, these methods and The implementation of the device can be referred to the implementation of the system, and the details are not repeated here.
- the network side device of the embodiment of the present invention includes: a configuration information determining module 100, a generating module 110, and a sending module 120.
- the configuration information determining module 100 is configured to determine configuration information of the first RE group that performs interference measurement.
- the generating module 110 is configured to generate first interference notification information according to the configuration information of the first RE group determined by the configuration information determining module 100.
- the sending module 120 is configured to send the first interference notification information generated by the generating module 110 to the terminal, to instruct the terminal to determine the first RE group according to the first interference notification information, and perform interference measurement on the determined first RE group.
- the generating module 110 determines the measurement set information, and uses the determined measurement set information as the first interference notification information, where the measurement set information includes configuration information of each second RE group and a cell corresponding to each second RE group. a cell identifier, and configuration information of each first RE group and a virtual cell identifier corresponding to each first RE group, or the measurement set information includes only configuration information of each second RE group and each second RE The cell identifier of the corresponding cell of the group;
- the second RE group is an RE group used to measure a neighbor cell channel.
- the sending module is further configured to: send the first RE group to the terminal Configuration information.
- the measurement set information includes only the configuration information of each second RE group and each second RE group The cell identifier of the corresponding cell;
- the network side device of the embodiment of the present invention further includes: a first notification module 130.
- the first notification module 130 is configured to send configuration information of each RE group in the RE group set to the terminal.
- the generating module 110 determines the interference measurement indication information corresponding to the configuration information of the first RE group according to the correspondence between the configuration information and the interference measurement indication information, and uses the determined interference measurement indication information as the first interference notification information.
- the interference measurement indication information is determined by the generation module 110 by means of a bitmap; or
- the interference measurement indication information is determined by the generation module 110 according to the configuration information of the first RE group; or the interference measurement indication information is determined by the generation module 110 according to the number of the first RE group; or the interference measurement indication information is generated by the generation module 110 according to the first
- the configuration information of the RE group is determined by the virtual cell identifier corresponding to the first RE group.
- the interference measurement indication information is determined by the generation module 110 in a bitmap manner, or the interference measurement indication information is determined by the generation module 110 according to the number of the first RE group;
- the network side device of the embodiment of the present invention further includes: a second notification module 140.
- the second notification module 140 is configured to send, to the terminal, configuration information of each RE group in the RE group set, where the RE group set is composed of the first RE group and the second RE group.
- the generating module 110 may further generate first interference notification information according to the determined configuration information of the first RE group after determining that the terminal needs to perform interference measurement on the first RE group.
- the generating module 110 determines that the terminal does not need to perform interference measurement on the first RE group, the second interference notification information is generated.
- the sending module 120 sends the second interference notification information to the terminal, indicating that the terminal is configured according to the CRS and/or the measurement. Frequency interference measurement.
- the terminal in the embodiment of the present invention includes: a location determining module 200 and a measurement module.
- the location determining module 200 is configured to determine, according to the received first interference notification information from the network side device, a location of the first RE group that performs the interference measurement.
- the measurement module 210 is configured to perform interference measurement on the first RE group determined by the location determining module 200. If the first interference notification information is configuration information including each second RE group and a cell identifier of a cell corresponding to each second RE group, and configuration information of each first RE group and each first RE group Measurement set information of the virtual cell identifier, where the second RE group is an RE group used for measuring a neighbor cell channel;
- the location determining module 200 determines configuration information of the first RE group included in the measurement set information according to the virtual cell identifier corresponding to the first RE group, and determines the location of the first RE group according to the determined configuration information.
- the first interference notification information is measurement set information including only the configuration information of each second RE group and the cell identity of the cell corresponding to each second RE group, where the second RE group is the RE used for measuring the neighbor cell channel Group
- the location determining module 200 receives configuration information of each RE group in the set of RE groups from the network side device, searches for non-second RE groups from configuration information of all RE groups in the RE group set, and uses the found RE group as The first RE group, and determining the configuration information corresponding to the first RE group from the received RE group set, and determining the location of the first RE group according to the determined configuration information, where the RE group set is composed of all silent RE groups.
- the first interference notification information is interference measurement indication information
- the location determining module 200 determines configuration information of the first RE group according to the interference measurement indication information, and determines the location of the first RE group according to the determined configuration information.
- the interference measurement indication information is determined by the network side device by using a bitmap
- the location determining module 200 receives configuration information of all RE groups in the RE group set from the network side device, determines a first RE group from all RE groups according to a bitmap manner, and configures configuration information of all RE groups in the received RE group set. Determining configuration information of the first RE group;
- the location determining module 200 receives configuration information of all RE groups in the RE group set from the network side device, and all REs from the RE group set according to the numbering manner. Determining the first RE group in the group, and determining configuration information of the first RE group from configuration information of all RE groups in the received RE group set;
- the RE group set is composed of a first RE group and a second RE group.
- the location determining module 200 is further configured to: receive configuration information of the first RE group sent by the network side.
- the measurement module 210 determines an average received power value on the first RE group, and uses the determined average power value as a dry estimate.
- the first method for measuring interference in the embodiment of the present invention includes the following steps: Step 501: A network side device determines configuration information of a first RE group that performs interference measurement.
- Step 502 The network side device generates the first interference notification information according to the determined configuration information of the first RE group, and sends the first interference notification information to the terminal, where the terminal is configured to determine the first RE group according to the first interference notification information, and Interference measurements are made on the determined first RE group.
- each subframe has multiple REs, and multiple REs can be selected from all REs and divided into multiple RE groups.
- the specific grouping situation can be determined in the protocol or negotiated between the network side and the terminal side.
- the divided multiple RE groups may be updated as needed.
- the packet status after the specific update can be determined in the protocol or negotiated between the network side and the terminal side.
- the RE group here may or may not include the RE occupied by the measurement pilot of the serving cell.
- the network side device 10 selects a plurality of groups that need to be silent (ie, a group consisting of MUTING REs in the background art) from the group of REs to form an RE group set, and select at least one group of REs from the RE group set.
- the first RE group that is, the RE group set is composed of all silent RE groups.
- the number of RE groups in the RE group set may be more than the number of RE groups occupied by the pilots of the coordinated transmission cell of the terminal.
- the network side device determines the first RE group that performs interference measurement according to the location of the RE group set of the neighboring cell or according to the location of the terminal, or randomly selected.
- the configuration information of each first RE group can be determined.
- the configuration information of the RE group includes but is not limited to one or more of the following information:
- the network side device generates the first interference notification information according to the determined configuration information of the first RE group. There are several ways to do the following:
- the network side device determines the measurement set information, and uses the determined measurement set information as the first notification information.
- the second RE group is the RE group used for measuring the channel of the neighboring cell, and the cells corresponding to the different second RE groups are different, so the second RE may be used.
- the configuration information corresponding to the group and the cell identifier of the corresponding cell are placed in the measurement set information; and the first RE group also has configuration information, but there is no corresponding cell, so the virtual cell identifier can be used as the cell identifier corresponding to the first RE group, for example, LTE defines a total of 504 physical layer cell identifiers, and requires a 9-bit identifier.
- the 504-511 identifier can be used as the virtual cell identifier, and then the configuration information of the first RE group and the corresponding virtual cell identifier are placed in the measurement set information. That is, the measurement set information includes configuration information of each second RE group in the RE group set and a cell identifier of a cell corresponding to each second RE group, and configuration information of each first RE group and each first The virtual d and area ID corresponding to the RE group.
- the measurement set information may also have no configuration information of each first RE group and a virtual cell identifier corresponding to each first RE group, and only includes configuration information of each second RE group and a cell corresponding to each second RE group. Cell identification. In this way, the configuration information of the first RE group of the terminal can be implicitly notified, but before the implicit notification is applied, the network side device needs to send the configuration information of each RE group in the RE group set to the terminal.
- the network side device determines the interference measurement indication information corresponding to the configuration information of the first RE group according to the correspondence between the configuration information and the interference measurement indication information, and uses the determined interference measurement indication information as the first interference notification information.
- the interference measurement indication information is determined by the network side device by using a bitmap manner; or the interference measurement indication information is determined by the network side device according to the number of the first RE group; or the interference measurement indication information is that the network side device is according to the first RE group. And the interference measurement indication information is configured by the network side device according to the configuration information of the first RE group and the first RE group The corresponding virtual d and area identifier are determined.
- the network side device may send each RE in the RE group set to the terminal.
- the configuration information of the group or the configuration information of the first RE group is sent to the terminal 20, and then the corresponding interference measurement indication information is determined according to the location of each RE group.
- the configuration information of the first RE group It will be sent to the terminal, so there is no need to send the configuration information of each RE group in the RE group set to the terminal.
- the interference measurement indication information in the embodiment of the present invention is not limited to the above four types, and other content that enables the terminal to determine the configuration information of the first RE group can be used as the interference measurement indication information in the embodiment of the present invention.
- the network side device needs to send measurement set information and interference measurement indication information to the terminal, for example, sending measurement information including only the configuration information of each second RE group and the cell identity of each cell corresponding to the second RE group, and interference measurement
- the indication information may be sent together with the interference measurement indication information or separately.
- the network side device may send configuration information of each RE group in the RE group set or only configuration information of the first RE group to the terminal regardless of the manner.
- the location information included in the subframe may also be determined by using a bitmap.
- the network side device after determining that the terminal needs to perform interference measurement on the first RE group, the network side device generates first interference notification information according to the determined configuration information of the first RE group.
- the network side device determines the second interference notification information after determining that the terminal does not need to perform interference measurement on the first RE group, the second interference notification information is sent to the terminal, and the terminal is instructed to perform interference measurement according to the CRS and/or the measurement pilot.
- the second RE group occupies all possible RE groups, and cannot find a suitable RE group for the terminal to estimate interference; or In order to control the overhead, the introduction of an additional first RE group adds overhead; or
- the terminal can accurately estimate interference based on CRS and/or measurement pilots.
- the second interference notification information is determined by the network side device by using a bitmap manner; or the second interference notification information is determined by the network side device according to the virtual d and the area identifier.
- the interference measurement indication information described above may be utilized.
- the interference measurement indication information it is also possible to add 2 bits to the interference measurement indication information, so that the first interference notification information and the second interference notification information can be made into one interference notification information. For example, if the interference measurement indication information requires 6 bits, then 2 bits can be added at the end, and the measurement information is 8 bits. If it is determined that the terminal 20 is required to perform interference measurement on the first RE group, the first 6 bits of the interference measurement indication information are determined according to the bitmap, and the last 2 bits are all 0; if it is determined that the terminal 20 is not required to perform interference on the first RE group For measurement, the first 6 bits of the interference measurement indication information are all 0, and the last 2 bits are determined as needed.
- a corresponding virtual d and area identifier may be directly sent.
- All the information sent by the network side device to the terminal can be sent by using high layer signaling, such as RRC signaling.
- the network side device in the embodiment of the present invention may be a base station (such as a macro base station, an evolved base station, a home base station, etc.), or an RN (relay) device, or other network side devices.
- a base station such as a macro base station, an evolved base station, a home base station, etc.
- RN relay
- the second method for measuring interference in the embodiment of the present invention includes the following steps: Step 601: The terminal determines, according to the received first interference notification information from the network side device, the first RE group that performs interference measurement. position.
- Step 602 The terminal performs interference measurement on the determined first RE group.
- the terminal determines the configuration information of the first RE group included in the measurement set information according to the virtual cell identifier corresponding to the first RE group, and determines the first RE according to the determined configuration information. The location of the group.
- the terminal checks the corresponding cell identifier, finds the configuration information corresponding to the virtual cell identifier, uses the configuration information as the configuration information of the first RE group, and then, according to the configuration information, can know the period of the first RE group, the subframe offset. And its position in the subframe.
- the first interference notification information is measurement set information including only configuration information of each second RE group and a cell identity of a cell corresponding to each second RE group, where the RE group set is composed of the first RE group and the second RE group Composition
- the terminal receives the configuration information of each RE group in the RE group set of the network side device, so that the configuration information of all the RE groups in the RE group set is known, and then all the non-second REs are searched from the RE group set.
- the group that is, the set of the RE group, but not the second group of the RE
- the RE group that is found is the first RE group
- the configuration information corresponding to the first RE group is determined from the configuration information of all the RE groups in the set of the RE group.
- the period of the first RE group, the subframe offset, and its position in the subframe are determined according to the determined configuration information.
- the first interference notification information is interference measurement indication information
- step 601 the terminal determines configuration information of the first RE group according to the interference measurement indication information, and determines a location of the first RE group according to the determined configuration information.
- the interference measurement indication information is determined by the network side device in a bitmap manner; or the interference measurement indication information is determined by the network side device according to the number of the first RE group, for example, directly notifying the terminal of the specific first RE group number, requiring the terminal If the measurement interference is performed on the nth RE group, the terminal may be directly notified to n; or
- the interference measurement indication information is determined by the network side device according to the configuration information of the first RE group; or the interference measurement indication information is determined by the network side device according to the configuration information of the first RE group and the virtual d and the area identifier corresponding to the first RE group. .
- the interference measurement indication information is determined by the network side device 10 in a bitmap manner; or the interference measurement indication information is determined by the network side device according to the number of the first RE group.
- the terminal Receiving configuration information of all RE groups in the RE group set of the network side device or configuration information of the first RE group, in step 601, the terminal determines the first RE group according to the bitmap mode or number, and receives the RE group from the In the configuration information, determine the configuration information of the first RE group.
- the terminal is in a separate manner. After receiving the configuration information of the first RE group (or separately receiving the configuration information of the first RE group and the virtual cell identifier corresponding to the first RE group), it is known that the RE group corresponding to the configuration information is the first RE group, and according to The configuration information determines the location of the first RE group in the subframe.
- the interference measurement indication information in the embodiment of the present invention is not limited to the above four types, and other content that enables the terminal to determine the configuration information of the first RE group can be used as the interference measurement indication information in the embodiment of the present invention.
- step 602 when the terminal performs interference measurement on the determined first RE group, the average received power value on the first RE group may be determined, and the determined average power value is used as the interference estimation value.
- the method in the implementation of the present invention further includes:
- the interference measurement is performed according to the CRS and/or the measurement pilot according to the indication of the second interference notification information.
- the second interference notification information is determined by the network side device 10 in a bitmap manner, it is assumed that the first bit of 2 bits corresponds to the CRS, the second bit corresponds to the measurement pilot, and "0" represents no, " ⁇ represents no, if 2 bits If it is 10, it is determined that the interference measurement is performed according to the CRS; if 2 bits is 01, it is determined that the interference measurement is performed according to the measurement pilot; if the 2 bits is 11, it is determined that the interference measurement is performed according to the CRS and the measurement pilot.
- the interference measurement indication information it is also possible to add 2 bits to the interference measurement indication information, so that the first interference notification information and the second interference notification information can be made into one interference notification information. For example, if the interference measurement indication information needs 6 bits, then 2 bits can be added at the end, and the dry measurement instruction information is 8 bits. If the first 6 bits of the interference measurement indication information received by the terminal are not all "0", and the last 2 bits are all "0", it is determined that the interference measurement needs to be performed on the first RE group; if the interference measurement indication information received by the terminal The first 6 bits are all "0", the last 2 bits are not all "0", then it is determined not It is necessary to perform interference measurement on the first RE group, and further determine the measurement mode according to the last 2 bits.
- the terminal may determine the measurement mode according to the corresponding virtual cell identifier, for example, the CRS corresponds to the virtual cell identifier A, and the measurement pilot corresponds to the virtual cell identifier B.
- the CRS corresponds to the virtual cell identifier A
- the measurement pilot corresponds to the virtual cell identifier B.
- A it is known that CRS is used for interference measurement.
- B it is known to use the measurement pilot for interference measurement.
- a and B it is known to use CRS and measurement pilot for interference measurement.
- FIG. 5 and FIG. 6 can synthesize a process to form a new method for measuring interference, that is, steps 501 and 502 are performed, and then steps 601 and 602 are performed.
- the method for performing interference using the MUTING RE in the embodiment of the present invention includes the following steps:
- Step 1101 The base station determines, by using information interaction, the self-configured MUTING RE configuration information.
- Step 1102 The base station notifies each terminal of the configuration information of each MUTING RE group by broadcast or RRC signaling.
- the number and location of the MUTING RE are included; the location information of the MUTING RE includes a period, a subframe offset, a position within the subframe, etc.; the main purpose of notifying the location information of the MUTING RE to the terminal is to enable the terminal to correctly calculate Rate matching parameters to achieve proper demodulation.
- Step 1103 The base station determines a MUTING RE group for performing interference measurement in each MUTING RE group.
- Step 1104 The base station notifies the terminal of the MUTING RE group for interference measurement.
- Step 1105 The terminal determines a MUTING RE group that performs interference measurement, and determines configuration information of the MUTING RE group that performs interference measurement.
- Step 1106 The terminal determines, according to the configuration information of the MUTING RE group that performs the interference measurement, the location of the MUTING RE group that performs the interference measurement in the subframe.
- Step 1107 The terminal estimates an average received power value on the MUTING RE group that performs interference measurement, and uses the average received power value as the interference estimation value.
- embodiments of the invention may 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 one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
- a computer-usable storage medium 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 apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- 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.
- the terminal determines the CQI by using the interference determined by the embodiment of the present invention
- the accuracy of the high CQI enables the base station to better achieve link adaptation, thereby improving the efficiency of data transmission.
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Description
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Priority Applications (3)
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EP11823088.7A EP2566219B1 (en) | 2010-09-10 | 2011-09-09 | Method, system and device for measuring interference |
US13/700,983 US9125071B2 (en) | 2010-09-10 | 2011-09-09 | Method, system and apparatus for measuring interference |
KR1020127031501A KR101487375B1 (ko) | 2010-09-10 | 2011-09-09 | 간섭을 측정하는 방법, 시스템 및 장치 |
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CN201010280130.7 | 2010-09-10 |
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Publication number | Publication date |
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CN102404055B (zh) | 2014-06-18 |
US20130070634A1 (en) | 2013-03-21 |
CN102404055A (zh) | 2012-04-04 |
US9125071B2 (en) | 2015-09-01 |
EP2566219B1 (en) | 2016-11-09 |
KR20130029081A (ko) | 2013-03-21 |
EP2566219A4 (en) | 2013-08-14 |
KR101487375B1 (ko) | 2015-01-29 |
EP2566219A1 (en) | 2013-03-06 |
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