CN103428749B - A kind of descending multi-point signal mass measuring method and device - Google Patents
A kind of descending multi-point signal mass measuring method and device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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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
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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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
- H04B17/318—Received signal strength
- H04B17/327—Received signal code power [RSCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0076—Distributed coding, e.g. network coding, involving channel coding
- H04L1/0077—Cooperative coding
Abstract
The present invention is applicable to wireless communication technology field, providing descending multi-point signal mass measuring method and device, described method includes: user equipment (UE) receives the channel state information reference signals CSI-RS management collection configuration information that base station is sent by radio resource control RRC signaling; UE demodulates described RRC signaling, obtain CSI-RS management collection configuration information, and carry out the measurement of CSI-RS Reference Signal Received Quality RSRQ according to the CSI-RS antenna end slogan of instruction, the sub-frame configuration of each CSI-RS and CSI-RS configuration in described CSI-RS management collection configuration information. Is the embodiment of the present invention by above technical scheme, it is possible to improve the CSI-RS to each downlink point? the certainty of measurement of RSRQ, and implementation complexity is low, also indirectly improves the spectrum efficiency of system.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of descending multi-point signal mass measuring method and device.
Background technology
The research and development of present wireless communication system increasingly carries out evolution to the direction reaching higher frequency spectrum efficiency. In order to reach higher spectrum efficiency, one of them important directions is how to improve the spectrum efficiency when multiple cell identical networking. Down direction at multiple cell identical networking, the downlink point of each community is all for the UE (UserEquipment in oneself community, subscriber equipment) send downlink data, owing to being identical networking, so the downstream signal that neighbor cell sends in the downstream direction can be overlapped mutually in UE side, thus the downlink reception of UE is produced interference. Solving multiple adjacent same exit point that takes place frequently at down direction to the UE a kind of effective ways producing interference is, multiple different downlink points are carried out CoMP (CoordinatedMultiplePoints, collaborative multiple spot) operation, so that the signal that each different launch point arrives UE side can produce useful superposition, thus producing to receive gain accordingly. Realizing above-mentioned purpose, need the downstream signal measurement that the adjacent base station from same frequency is launched in UE side, then the signal quality of measurement is reported the base station oneself providing service by UE, in order to serving BS makes the selecting properly of multipoint cooperative. Therefore how to when there is the identical networking of co-channel interference, it is correctly carry out cooperation point to select basis that the signal quality from different base station carries out accurate and effective measurement, is also one of key factor improving multi-cell downlink spectrum efficiency.
Signal quality measured when for how measuring multiple cell identical networking, prior art uses LTE-A (LongTermEvolution-Advanced, senior Long Term Evolution) the downlink channel condition information CSI-RS (ChannelStateInformation-ReferenceSignal of definition in version 10, channel state information reference signals) in occur OFDM (OrthogonalFrequencyDivisionMultiplexing, OFDM) character position carry out the measurement of signal quality.
The OFDM symbol position occurred in the CSI-RS of definition in LTE-A version 10 is used to carry out the measurement of signal quality, what exist major problem is that, density that CSI-RS in LTE-A version 10 occurs is the closeest be also 5ms once, the rarest, reach 80ms once, and a CSI-RS only takes up 2 OFDM symbol. Therefore, if using the measurement carrying out signal quality as the OFDM symbol position occurred in the CSI-RS of definition in version 10, its precision is difficult to meet the requirement of descending CoMP multidrop channel mass measurement.
Summary of the invention
Embodiments provide the measuring method of a kind of downlink channel condition information, device and subscriber equipment, aim to solve the problem that the CSI-RS cycle occurred is big, the problem that signal is more sparse and brings certainty of measurement is inadequate, improve the certainty of measurement of CSI-RSRSRQ, it is possible to for the effective metrical information of signal quality measured offer of the descending multi-point transmitting of descending CoMP.
On the one hand, it is provided that a kind of descending multi-point signal mass measuring method, including:
User equipment (UE) receives the channel state information reference signals CSI-RS management collection configuration information that base station is sent by radio resource control RRC signaling, described CSI-RS management collection configuration information includes: CSI-RS antenna end slogan, CSI-RS configure, and the sub-frame configuration of each CSI-RS;
UE demodulates described RRC signaling, obtains CSI-RS management collection configuration information;
CSI-RS configuration according to the management collection configuration information instruction of described CSI-RS, and the sub-frame configuration of each CSI-RS, the antenna port measurement that described CSI-RS antenna end slogan is corresponding obtain the Reference Signal Received Power RSRP measured value of CSI-RS;
The measurement position of signaling Network Based instruction, or the measurement position based on the instruction of described UE higher layer message, or the measuring method based on the instruction of described UE higher layer message, carry out the received signal strength indicator rssi measurement of CSI-RS, obtain CSI-RSRSSI measured value;
According to formula RSRQ=N*RSRP/RSSI, calculating the measured value obtaining CSI-RSRSRQ, wherein, N measures the Resource Block RB quantity in the bandwidth of received signal strength indicator RSSI place, and RSRP is CSI-RSRSRP measured value, and RSSI is CSI-RSRSSI measured value.
On the other hand, it is provided that a kind of descending multi-point signal apparatus for measuring quality, for subscriber equipment, channel state information reference signals CSI-RS Reference Signal Received Quality RSRQ being measured, this device includes:
Receive unit, for receiving the CSI-RS management collection configuration information that base station is sent by radio resource control RRC signaling, described CSI-RS management collection configuration information includes: CSI-RS antenna end slogan, CSI-RS configure, and the sub-frame configuration of each CSI-RS;
Demodulating unit, for demodulating the RRC signaling that described reception unit receives, obtains CSI-RS management collection configuration information;
First measuring unit, for the CSI-RS configuration according to the management collection configuration information instruction of described CSI-RS, and the sub-frame configuration of each CSI-RS, the antenna port measurement that described CSI-RS antenna end slogan is corresponding obtain the Reference Signal Received Power RSRP measured value of CSI-RS;
Second measuring unit, for the measurement position that signaling Network Based indicates, or the measurement position based on the instruction of described UE higher layer message, or the measuring method based on the instruction of described UE higher layer message, carry out the received signal strength indicator rssi measurement of CSI-RS, obtain CSI-RSRSSI measured value;
Computing unit, for according to formula RSRQ=N*RSRP/RSSI, calculating the measured value obtaining CSI-RSRSRQ, wherein, N is the quantity of the Resource Block RB measuring received signal strength indicator RSSI place bandwidth, and RSRP is CSI-RSRSRP measured value, and RSSI is CSI-RSRSSI measured value.
In embodiments of the present invention, by receiving the RRC signaling including CSI-RS management collection configuration information that base station sends, and the subframe configuration information of instruction and CSI-RS is configured according to the CSI-RS in RRC signaling, specific position carries out the measurement of CSI-RS Reference Signal Received Quality RSRQ, with in prior art only CSI-RS place OFDM symbol position carry out the measurement of signal quality compared with, method provided by the invention can when the CSI-RS density occurred be less, ensure that the certainty of measurement of CSI-RSRSRQ, thus improving the certainty of measurement of the CSI-RSRSRQ to each downlink point, the report measuring signal quality more accurately is provided for base station, contribute to base station and make more effective judgement when CoMP cooperation collection selects, it is thus possible to improve CoMP to launch the accuracy that collection launch point selects, more effectively ensure that the acquisition of CoMP gain, thus improve the spectrum efficiency of system.
Accompanying drawing explanation
The LTECoMP general system model schematic diagram that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 uses a Resource Block schematic diagram in the subframe structure of normalCP in LTE system;
The descending multi-point signal mass measuring method flow chart that Fig. 3 provides for the embodiment of the present invention one;
The measuring method flow chart of the CSI-RS Reference Signal Received Quality RSRQ that Fig. 4 provides for the embodiment of the present invention one;
The normalCP type subframe that Fig. 5 a provides for the embodiment of the present invention one CSI-RS port 15 and 16 schematic diagram on a RB;
The normalCP type subframe that Fig. 5 b provides for the embodiment of the present invention one CSI-RS single port 15 schematic diagram on a RB;
Fig. 6 is the CRSRSSI measuring method block diagram that the embodiment of the present invention one provides;
Fig. 7 is two kinds of OFDM symbol position views that in the normal subframe that the embodiment of the present invention one provides, CSI-RS occurs;
The descending multi-point signal mass measuring method flow chart that Fig. 8 provides for another embodiment of the present invention;
Fig. 9 is the structured flowchart of the descending multi-point signal apparatus for measuring quality that the embodiment of the present invention two provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Below in conjunction with specific embodiment, the realization of the present invention is described in detail:
Embodiment one
The embodiment of the present invention provides a kind of descending multi-point signal mass measuring method, the method is typically applied in LTE communication system, in LTE communication system, data send can be divided into up transmission and descending transmission, the up sender of referring to is user terminal UE, and recipient is base station (the node B of eNB:evolvedNodeB evolution); Descending transmission refers to that sender is base station, and recipient is user terminal. Fig. 1 is the CoMP mode of operation schematic diagram of the LTE system that the embodiment of the present invention provides, as shown in Figure 1, under CoMP pattern, multiple base stations provide communication service for multiple users (namely moving platform) simultaneously collaboratively, each user can receive the data stream of multiple antenna, and at synchronization, what each user can be independent receives different data stream, therefore, it is possible to reach the high handling capacity of comparison (throughput).
Descending CoMP needs to do the measurement of the signal quality of multiple downlink point, carrying out the physical resource required for these are measured is CSI-RS (ChannelStateInformation-ReferenceSignal channel state information reference signals), the parameter of the required signal quality measured is RSRP (ReferenceSignalReceivedPower Reference Signal Received Power) and RSRQ (ReferenceSignalReceivedQuality Reference Signal Received Quality), writes a Chinese character in simplified form into CSI-RSRSRP and CSI-RSRSRQ. RSRP is at the intensity level with particular reference to the signal power received on letter, and RSRQ is the signal quality value of definition in specific reference signals.
In LTE-A version 10, defining the CRS method doing channel quality measurement, the method is primarily directed to and carries out on the port 0 of CRS, as shown in Figure 2, for LTE system uses a RB (ResourceBlock, the Resource Block) schematic diagram in the subframe structure of normalCP. The CSI-RS of mark Port0 occurs on the portion subcarriers in the OFDM symbol 0 and 4 in time slot 0 and time slot 1. Namely the CRSRSRP of mobile management is the CSI-RS measurement on port 0 as shown in Figure 1, if UE is able to detect that CRS port 1, then can do the measurement of RSRP simultaneously on port 0 and port 1, otherwise give tacit consent to the measurement being RSRP on port 0. Measuring the value of CRSRSRQ, then have only to measure the value of CRSRSSI, the value of CRSRSSI is defined in carrying out on the OFDM symbol 0 of the time slot 0 shown in upper figure and time slot 1 and symbol 4.
Additionally, in LTE-A version 10, also define CSI-RS and do the measurement of channel quality, the research of version 11 having been contemplated that, the CSI-RS configuration mode simultaneously using counterpart 10 is to do more types of measurement, does the descending CoMP measurement launching the signal quality (CSI-RSRSRP and CSI-RSRSRQ) of multiple spot including the CSI-RS using non-zero. The port 15-22 that CSI-RS reference signal occurs, the OFDM symbol that OFDM symbol position is time slot 05,6 occurred in the normalCP (general cyclic prefix) and the OFDM symbol 2,3 (such as Fig. 2) of time slot 1, and the OFDM symbol 4 and 5 of the extension CP on time slot 0 and time slot 1. As it has been described above, only in version 10, the OFDM symbol position at the CSI-RS place of definition carries out the measurement of signal quality is the measurement requirement that can not meet descending CoMP multi-point transmitting to signal quality. The present invention seeks to solve when measuring CSI-RSRSRQ, and how system indicates the method measuring which OFDM symbol and measurement.
Specifically, according to Fig. 3, the descending multi-point signal mass measuring method that the embodiment of the present invention one provides, including:
Step S301, user equipment (UE) receives the channel state information reference signals CSI-RS management collection configuration information that base station is sent by radio resource control RRC signaling;
Specifically, CSI-RS management collection configuration information is pre-configured with by base station eNB, in one embodiment, according to topology of networks, (namely eNB can pass through information of adjacent cells to eNB, and OAM (OperationAdministrationMaintenance, operation management maintainance) interface obtains the connection list of the adjacent sending node adjacent with this eNB, namely which community knows around has adjacent with oneself) carry out the particular UE configuration CSI-RS management for eNB service and collect, then this CSI-RS management collection configuration information is sent to UE by UE specific RRC (RadioResource) signaling by eNB.
Wherein, CSI-RS management collection configuration information includes: CSI-RS antenna end slogan, CSI-RS configure, the sub-frame configuration of each CSI-RS; Wherein, CSI-RS is configured to a kind of instruction information, is used to refer to subframe position that CSI-RS occurs, OFDM symbol position that CSI-RS occurs in subframe, and the sub-carrier positions of appearance on each RB in a frequency domain; The sub-frame configuration of CSI-RS represents the period of sub-frame and sub-frame offset that CSI-RS occurs;
In another embodiment, CSI-RS management collection configuration information may further comprise: that the sequence scrambler carrying out CSI-RS reference signal generation initializes the initial cell identification information (being labeled as X) needed, CSI-RS number.
Step S302, UE demodulates described RRC signaling, obtain CSI-RS management collection configuration information, and carry out the measurement of CSI-RS Reference Signal Received Quality RSRQ according to the CSI-RS antenna end slogan of instruction, the sub-frame configuration of each CSI-RS and CSI-RS configuration in described CSI-RS management collection configuration information.
As a preferred embodiment of the present invention, carry out the concrete execution process of concrete grammar of the measurement of CSI-RS Reference Signal Received Quality RSRQ as shown in Figure 4:
Step 31, UE carry out the measurement of CSI-RSRSRP according to the CSI-RS configuration that RRC signaling indicates;
Specifically, the UE CSI-RS configuration according to the management collection configuration information instruction of described CSI-RS, and the sub-frame configuration of each CSI-RS, the antenna port measurement that described CSI-RS antenna end slogan is corresponding obtain the Reference Signal Received Power RSRP measured value of CSI-RS. Specifically, frequency domain position on subframe position that UE occurs according to the CSI-RS that the configuration of described CSI-RS is indicated, OFDM symbol position, CSI-RS place, CSI-RS place RB, the signal power on all CSI-RS subcarriers obtained by the CSI-RS measurement on the Measurement bandwidth of described antenna port, then all these performance numbers measured are carried out arithmetic average, obtain CSI-RSRSRP measured value in corresponding CSI-RS; Below by citing, the measuring method of CSI-RSRSRP is described further.
Fig. 5 a show normalCP type subframe CSI-RS port 15 and 16 schematic diagram on a RB, and when being multiport referring to Fig. 5 a to CSI-RS, the measuring method of CSI-RSRSRP does an explanation; Assume that the CSI-RS distribution that UE receives is as shown in Figure 5 a and has the CSI-RS that 2 port numbers are 15 and 16, when the RSRP being CSI-RS measures, UE can first do the despreading of orthogonal covering codes, namely UE data respectively r1 and the r2 at 2 shown in Fig. 5 OFDM symbol received over subcarriers is assumed, then at UE received signal power P on port 15 and 1615、P16It is respectively as follows:
UE carries out arithmetic average to measuring, on the port 15 and 16 on all RB, the signal power obtained, and namely obtains CSI-RSRSRP RSRP measured value on corresponding port 15 main 16. The sum reporting the value RSRP measured value for finally obtaining on port 15 and 16 then measured in the CSI-RS shown in Fig. 5.
It is that the measuring method of CSI-RSRSRP under single port situation does an explanation below to CSI-RS. As shown in Figure 5 b for normalCP type subframe CSI-RS antenna port on a RB be single port 15, now calculate CSI-RSRSRP time have only to do the calculating of port 15, it may be assumed that
Then, the signal power that measurement on all RB on the CSI-RS Measurement bandwidth of port 15 is obtained by UE carries out arithmetic average, namely obtains the measured value of CSI-RSRSRP.This be also in CSI-RS measure to report value. From the description above it can be seen that whether single antenna port or multiple antenna port, CSI-RSRSRP all only one of which report value.
Step 32, UE carry out the measurement of CSI-RSRSSI;
Specifically, the embodiment of the present invention provides the measuring method of three kinds of CSI-RSRSSI: the measurement position of signaling Network Based instruction or the measurement position based on the instruction of described UE higher layer message or the measuring method according to the instruction of described UE higher layer message carry out the received signal strength indicator rssi measurement of CSI-RS, and these three method is done a detailed description below.
Consider under descending CoMP scene, all downlink points be almost the time, Frequency Synchronization, so the result of the CRSRSSI obtained based on CRS measurement in mobile management, it is believed that to the greatest extent like identical based on the measurement result of CSI-RS with when being CoMP, therefore in one embodiment of the invention, the measuring method of a kind of simple and effective CSI-RSRSSI is directly to use CRSRSSI measuring unit result;
Fig. 6 show and uses CRSRSSI measuring unit result method block diagram, and according to Fig. 6, the method specifically includes that
Step 1:UE is from the eNB the received RRC signaling including CSI-RS management collection configuration information issued, and obtains CSI-RS.
Step 2:UE, in the measuring unit of CSI-RSRSSI, directly reads the physical layer the last with current time from UE side shifting administrative unit and measures the RSSI value obtained based on CRS port 0, as the physical layer measurements of CSI-RSRSSI.
In another embodiment of the invention, UE can signaling Network Based instruction measurement position, carry out CSI-RSRSSI measurement, obtain CSI-RSRSSI measured value;
Specifically, eNB, by special RRC signaling, configures the specific RRC signaling of UE to UE, includes position instruction message, be used to refer to the measurement being CSI-RSRSRQ on which position in the CSI-RS subframe occurred in this RRC signaling. The position of the message instruction of position instruction here divides again two kinds, and one is instruction is measured in which OFDM symbol. The position of instruction can be whole OFDM symbol of 2 time slots in certain subframe or a part of OFDM symbol therein. For example, as shown in Figure 7, if whole OFDM symbol of the OFDM symbol that character position is time slot 03,4,5,6 that eNB is measured by RRC signal deployment and time slot 1, then UE does the measurement of RSSI on this altogether 10 OFDM symbol, then again these 10 RSSI value are done sums on average, obtain final CSI-RSRSSI measured value. Here the measuring method of RSSI is further illustrated. The Measurement bandwidth assuming RSSI is 50RB, in LTE protocol, each RB always has 12 subcarriers. Each OFDM symbol calculates the arithmetic average of sub-carrier power on each RB, then the power on 50 RB all in Measurement bandwidth in this OFDM symbol is added, namely obtains the RSSI value in an OFDM symbol. Or when the instruction of RRC signaling carry out in continuous 5 descending sub frames after CSI-RS position starts occur CSI-RSSI measure time, then the position measurement of UE all OFDM symbol in these subframes, then does sums measuring the result obtained in all subframes on average.
Described calculation is stated on average, namely assumes have M number a1, a2 ..., aM, meansigma methods a=(a1+a2+...+aM)/M is stated in the calculation of this M number.
The instruction of another kind of position is that eNB is by the measurement of RSRQ is done in special RRC signaling instruction on which descending sub frame. UE then RRC signaling according to eNB configuration, carries out the measurement of RSSI value to the OFDM symbol in all subframes of signaling instruction, and then UE carries out arithmetic average to measuring the RSSI obtained in all subframes, obtains final CSI-RSRSSI measured value.
It should be noted that eNB can indicate, by special RRC signaling, the measurement being CSI-RSRSRQ on the UE which position in the CSI-RS subframe occurred; Position when sending CSI-RS management collection configuration information by radio resource control RRC signaling, can also be indicated message to be also included in the lump in this RRC signaling, be sent to corresponding UE by eNB.
In another embodiment, it is also possible to select different measurement positions to be CSI-RSRSSI according to the instruction of UE side higher layer message and measure, obtain CSI-RSRSSI measured value;
It should be noted that need not indicate the position of frequency domain owing to measuring RSSI, therefore UE higher layer message has only to instruction to which subframe or which OFDM symbol is measured. Therefore, the positional information of described UE higher layer message instruction specifically includes that the OFDM symbol in CSI-RSRSSI antenna end slogan, the subframe numbers of measurement and/or described subframe numbers;
Specifically, when not using above two method, the high level of UE can self-defining measure OFDM symbol number or need measure subframe position, and by interlayer message need measure OFDM symbol position issue UE physical layer measure. High level such as UE indicates measurement in UE OFDM symbol 3,5,6 in the time slot 0 of CSI-RS place subframe and the OFDM symbol 2,3,5,6 in time slot 1. UE physical layer then carries out the measurement of RSSI by above-mentioned indicated OFDM position, after having measured, then carries out arithmetic average to measuring each RSSI value obtained in above-mentioned OFDM symbol. Or when the high-rise instruction of UE carry out in continuous 5 descending sub frames after CSI-RS position starts occur CSI-RSSI measure time, then UE does the measurement of RSSI in all OFDM symbol of these subframes, then does sums measuring the result obtained in all subframes on average.
Further, the measurement position that higher layer message selection in UE side is different is done the basic principle measured and is: guarantee UE measurement of CSI-RSRSSI in sufficient amount of OFDM symbol. Such as, if eNB is to the UE CSI-RS density configured less (as in time domain, 80ms distributes a CSI-RS), then the high level of UE can configure UE physical layer and measure more OFDM symbol or subframe near the CSI-RS position occurred.
Step 33, UE physical layer, according to formula RSRQ=N*RSRP/RSSI, calculate the measured value obtaining CSI-RSRSRQ, and wherein, N is the quantity of the Resource Block RB in systematic survey received signal strength indicator rssi measurement bandwidth.
It should be noted that in another embodiment of the present invention, before step S301, also include:
Step S300, base station is according to the UE ability rating reported, it is judged that whether the UE of current service has the ability supporting descending CoMP communication, if UE does not have the ability supporting CoMP communication, then exits, does not carry out follow-up operation; If UE has the ability of CoMP communication, carry out step S301.
The present embodiment, by receiving the RRC signaling including CSI-RS management collection configuration information that base station sends, and according to the CSI-RS configuration instruction in CSI-RS management collection configuration information, specific position carries out the measurement of CSI-RS Reference Signal Received Quality RSRQ, with in prior art only CSI-RS place OFDM symbol position carry out the measurement of signal quality compared with, the certainty of measurement of CSI-RSRSRQ to each downlink point can be improved, and implementation complexity is low, also indirectly improve the spectrum efficiency of system.
Providing below the optimum embodiment of a measurement realizing CSI-RS Reference Signal Received Quality RSRQ, as shown in Figure 8, in the present embodiment, descending multi-point signal mass measuring method includes:
Step 801, user equipment (UE) receives the channel state information reference signals CSI-RS management collection configuration information that base station is sent by radio resource control RRC signaling, described CSI-RS management collection configuration information includes: CSI-RS antenna end slogan, CSI-RS configure, and the sub-frame configuration of each CSI-RS;
Step 802, UE demodulates described RRC signaling, obtains CSI-RS management collection configuration information;
Step 803, CSI-RS configuration according to the management collection configuration information instruction of described CSI-RS, and the sub-frame configuration of each CSI-RS, the antenna port measurement that described CSI-RS antenna end slogan is corresponding obtain the Reference Signal Received Power RSRP measured value of CSI-RS;
Specifically, frequency domain position on subframe position that UE occurs according to the CSI-RS that the configuration of described CSI-RS is indicated, OFDM symbol position, CSI-RS place, CSI-RS place RB, the signal power on all CSI-RS subcarriers obtained by the CSI-RS measurement on the Measurement bandwidth of described antenna port, then all these performance numbers measured are carried out arithmetic average, obtain CSI-RSRSRP measured value in corresponding CSI-RS.
It should be noted that detailed CSI-RSRSRP measuring method may refer to the step 31 of the embodiment of the present invention one, repeat no more herein.
Step 804, the measurement position of signaling Network Based instruction, or the measurement position based on the instruction of described UE higher layer message, or the measuring method based on the instruction of described UE higher layer message, carry out the received signal strength indicator rssi measurement of CSI-RS, obtain CSI-RSRSSI measured value;
Specifically, the embodiment of the present invention provides the measuring method of three kinds of CSI-RSRSSI: the measurement position of signaling Network Based instruction or the measurement position based on the instruction of described UE higher layer message or the measuring method according to the instruction of described UE higher layer message carry out the received signal strength indicator rssi measurement of CSI-RS, and these three method is done a detailed description below.
Consider under descending CoMP scene, all downlink points be almost the time, Frequency Synchronization, so the result of the CRSRSSI obtained based on CRS measurement in mobile management, it is believed that to the greatest extent like identical based on the measurement result of CSI-RS with when being CoMP, therefore in one embodiment of the invention, the measuring method of a kind of simple and effective CSI-RSRSSI is directly to use CRSRSSI measuring unit result;
Fig. 6 show and uses CRSRSSI measuring unit result method block diagram, and according to Fig. 6, the method specifically includes that
Step 1:UE is from the eNB the received RRC signaling including CSI-RS management collection configuration information issued, and obtains CSI-RS.
Step 2:UE, in the measuring unit of CSI-RSRSSI, directly reads the physical layer the last with current time from UE side shifting administrative unit and measures the RSSI value obtained based on CRS port 0, as the physical layer measurements of CSI-RSRSSI.
In another embodiment of the invention, UE can signaling Network Based instruction measurement position, carry out CSI-RSRSSI measurement, obtain CSI-RSRSSI measured value;
Specifically, eNB, by special RRC signaling, configures the specific RRC signaling of UE to UE, includes position instruction message, be used to refer to the measurement being CSI-RSRSRQ on which position in the CSI-RS subframe occurred in this RRC signaling.The position of the message instruction of position instruction here divides again two kinds, and one is instruction is measured in which OFDM symbol. The position of instruction can be whole OFDM symbol of 2 time slots in certain subframe or a part of OFDM symbol therein. For example, as shown in Figure 7, if whole OFDM symbol of the OFDM symbol that character position is time slot 03,4,5,6 that eNB is measured by RRC signal deployment and time slot 1, then UE does the measurement of RSSI on this altogether 10 OFDM symbol, then again these 10 RSSI value are done sums on average, obtain final CSI-RSRSSI measured value. Here the measuring method of RSSI is further illustrated. The Measurement bandwidth assuming RSSI is 50RB, in LTE protocol, each RB always has 12 subcarriers. Each OFDM symbol calculates the arithmetic average of sub-carrier power on each RB, then the power on 50 RB all in Measurement bandwidth in this OFDM symbol is added, namely obtains the RSSI value in an OFDM symbol. Or when the instruction of RRC signaling carry out in continuous 5 descending sub frames after CSI-RS position starts occur CSI-RSSI measure time, then the position measurement of UE all OFDM symbol in these subframes, then does sums measuring the result obtained in all subframes on average.
Described calculation is stated on average, namely assumes have M number a1, a2 ..., aM, meansigma methods a=(a1+a2+...+aM)/M is stated in the calculation of this M number.
The instruction of another kind of position is that eNB is by the measurement of RSRQ is done in special RRC signaling instruction on which descending sub frame. UE then RRC signaling according to eNB configuration, carries out the measurement of RSSI value to the OFDM symbol in all subframes of signaling instruction, and then UE carries out arithmetic average to measuring the RSSI obtained in all subframes, obtains final CSI-RSRSSI measured value.
It should be noted that eNB can indicate, by special RRC signaling, the measurement being CSI-RSRSRQ on the UE which position in the CSI-RS subframe occurred; Position when sending CSI-RS management collection configuration information by radio resource control RRC signaling, can also be indicated message to be also included in the lump in this RRC signaling, be sent to corresponding UE by eNB.
In another embodiment, it is also possible to select different measurement positions to be CSI-RSRSSI according to the instruction of UE side higher layer message and measure, obtain CSI-RSRSSI measured value;
It should be noted that need not indicate the position of frequency domain owing to measuring RSSI, therefore UE higher layer message has only to instruction to which subframe or which OFDM symbol is measured. Therefore, the positional information of described UE higher layer message instruction specifically includes that the OFDM symbol in CSI-RSRSSI antenna end slogan, the subframe numbers of measurement and/or described subframe numbers;
Specifically, when not using above two method, the high level of UE can self-defining measure OFDM symbol number or need measure subframe position, and by interlayer message need measure OFDM symbol position issue UE physical layer measure. High level such as UE indicates measurement in UE OFDM symbol 3,5,6 in the time slot 0 of CSI-RS place subframe and the OFDM symbol 2,3,5,6 in time slot 1. UE physical layer then carries out the measurement of RSSI by above-mentioned indicated OFDM position, after having measured, then carries out arithmetic average to measuring each RSSI value obtained in above-mentioned OFDM symbol. Or when the high-rise instruction of UE carry out in continuous 5 descending sub frames after CSI-RS position starts occur CSI-RSSI measure time, then UE does the measurement of RSSI in all OFDM symbol of these subframes, then does sums measuring the result obtained in all subframes on average.
Further, the measurement position that higher layer message selection in UE side is different is done the basic principle measured and is: guarantee UE measurement of CSI-RSRSSI in sufficient amount of OFDM symbol. Such as, if eNB is to the UE CSI-RS density configured less (as in time domain, 80ms distributes a CSI-RS), then the high level of UE can configure UE physical layer and measure more OFDM symbol or subframe near the CSI-RS position occurred.
Step 805, according to formula RSRQ=N*RSRP/RSSI, calculates the measured value obtaining CSI-RSRSRQ, wherein, N measures the Resource Block RB quantity in the bandwidth of received signal strength indicator RSSI place, and RSRP is CSI-RSRSRP measured value, and RSSI is CSI-RSRSSI measured value.
The present embodiment, by receiving the RRC signaling including CSI-RS management collection configuration information that base station sends, and according to the CSI-RS configuration instruction in CSI-RS management collection configuration information, specific position carries out the measurement of CSI-RS Reference Signal Received Quality RSRQ, with in prior art only CSI-RS place OFDM symbol position carry out the measurement of signal quality compared with, the certainty of measurement of CSI-RSRSRQ to each downlink point can be improved, and implementation complexity is low, also indirectly improve the spectrum efficiency of system.
Embodiment two
Fig. 9 illustrates the structured flowchart of the descending multi-point signal apparatus for measuring quality that the embodiment of the present invention two provides, in the present embodiment, this device can be the unit of the software unit in subscriber equipment, hardware cell or software and hardware combining, for subscriber equipment, channel state information reference signals CSI-RS Reference Signal Received Quality RSRQ is measured; Described subscriber equipment can constitute wireless communication system with base station and multiple downlink point, and described device includes: receive unit 91, demodulating unit the 92, first measuring unit the 93, second measuring unit 94 and computing unit 95.
Wherein, receive unit 91, for receiving the CSI-RS management collection configuration information that base station is sent by radio resource control RRC signaling, described CSI-RS management collection configuration information includes: CSI-RS antenna end slogan, CSI-RS configure, and the sub-frame configuration of each CSI-RS;
Specifically, CSI-RS management collection configuration information is pre-configured with by eNB, in one embodiment, according to topology of networks, (namely eNB can pass through information of adjacent cells to eNB, and OAM (OperationAdministrationMaintenance, operation management maintainance) interface obtains the connection list of the adjacent sending node adjacent with this eNB, namely which community knows around has adjacent with oneself) carry out the particular UE configuration CSI-RS management for eNB service and collect, then this CSI-RS management collection is sent to UE by the specific RRC signaling of UE by eNB.
Wherein, CSI-RS management collection configuration information includes: CSI-RS antenna end slogan, CSI-RS configure, the sub-frame configuration of each CSI-RS; Wherein, CSI-RS is configured to a kind of instruction information, is used to refer to the CSI-RS OFDM symbol position occurred in subframe, and the sub-carrier positions of appearance on each RB in a frequency domain; The sub-frame configuration of CSI-RS represents the period of sub-frame and sub-frame offset that CSI-RS occurs;
In another embodiment, CSI-RS management collection configuration information may further comprise: that the sequence scrambler carrying out CSI-RS reference signal generation initializes the initial cell identification information (being labeled as X) needed, CSI-RS number.
Demodulating unit 92, receives, for demodulating, the RRC signaling that unit 91 receives, and obtains CSI-RS management collection configuration information;
First measuring unit 93, for the CSI-RS configuration according to the management collection configuration information instruction of described CSI-RS, and the sub-frame configuration of each CSI-RS, the antenna port measurement that described CSI-RS antenna end slogan is corresponding obtain the Reference Signal Received Power RSRP measured value of CSI-RS;
Specifically, frequency domain position on subframe position that first measuring unit 93 occurs according to the CSI-RS that the configuration of described CSI-RS is indicated, OFDM symbol position, CSI-RS place, CSI-RS place RB, the signal power on all CSI-RS subcarriers obtained by the CSI-RS measurement on the Measurement bandwidth of described antenna port, then all these performance numbers measured are carried out arithmetic average, obtain CSI-RSRSRP measured value in corresponding CSI-RS.
It should be noted that the specific works flow process of the first measuring unit 93 is referred to the step 31 in the embodiment of the present invention one, repeat no more herein.
Second measuring unit 94, for the measurement position that signaling Network Based indicates, or the measurement position based on the instruction of described UE higher layer message, or the measuring method based on the instruction of described UE higher layer message, carry out the received signal strength indicator rssi measurement of CSI-RS, obtain CSI-RSRSSI measured value;
Specifically, in one embodiment, the second measuring unit 94 can select different measurement positions to carry out CSI-RSRSSI measurement according to the positional information of described subscriber equipment higher layer message instruction, obtains CSI-RSRSSI measured value; The positional information of wherein said subscriber equipment higher layer message instruction includes: the OFDM symbol in CSI-RSRSSI antenna end slogan, the subframe numbers of measurement and/or described subframe numbers.
In another embodiment, first second measuring unit 94 receives the measurement positional information that base station is sent by RRC signaling, this measurement positional information include described second measuring unit carry out CSI-RSRSSI measure the OFDM symbol position at place and/or described UE carries out the subframe measuring place of CSI-RSRSSI;
Then, the position that the second measuring unit 94 indicates at above-mentioned measurement positional information carries out CSI-RSRSSI measurement, obtains CSI-RSRSSI measured value.
In another embodiment, second measuring unit 94 only can also read the RSSI value the last with current time from described user equipment side mobility management unit, measured value as CSI-RSRSSI, wherein, this RSSI value be described UE physical layer based on public reference signal CRS port 0 measure obtain.
It should be noted that the specific works flow process of the second measuring unit 94 is referred to the step 32 in the embodiment of the present invention one, repeat no more herein.
Computing unit 95, for according to formula RSRQ=N*RSRP/RSSI, calculating the measured value obtaining CSI-RSRSRQ, wherein, N is the quantity of the Resource Block RB of systematic survey received signal strength indicator RSSI place bandwidth.
The subscriber equipment that the embodiment of the present invention provides can be applied in the embodiment of the method one of aforementioned correspondence, and details describe referring to above-described embodiment one, do not repeat them here.
In the embodiment of the present invention two, by receiving the RRC signaling including CSI-RS management collection configuration information that base station sends, and according to the CSI-RS configuration instruction in CSI-RS management collection configuration information, specific position carries out the measurement of CSI-RS Reference Signal Received Quality RSRQ, with in prior art only CSI-RS place OFDM symbol position carry out the measurement of signal quality compared with, can when the CSI-RS density occurred be less, ensure the certainty of measurement of CSI-RSRSRQ, thus improving the certainty of measurement of the CSI-RSRSRQ to each downlink point, and implementation complexity is low, also indirectly improve the spectrum efficiency of system.
It should be noted that in said apparatus embodiment, included unit is carry out dividing according to function logic, but is not limited to above-mentioned division, as long as being capable of corresponding function; It addition, the concrete title of each functional unit is also only to facilitate mutually distinguish, it is not limited to protection scope of the present invention.
Additionally, one of ordinary skill in the art will appreciate that all or part of step realizing in the various embodiments described above method can be by the hardware that program carrys out instruction relevant and completes, corresponding program can be stored in a computer read/write memory medium, described storage medium, such as ROM/RAM, disk or CD etc.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (12)
1. a descending multi-point signal mass measuring method, it is characterised in that including:
User equipment (UE) receives the channel state information reference signals CSI-RS management collection configuration information that base station is sent by radio resource control RRC signaling, described CSI-RS management collection configuration information includes: CSI-RS antenna end slogan, CSI-RS configure, and the sub-frame configuration of each CSI-RS;
UE demodulates described RRC signaling, obtains CSI-RS management collection configuration information;
CSI-RS configuration according to the management collection configuration information instruction of described CSI-RS, and the sub-frame configuration of each CSI-RS, the antenna port measurement that described CSI-RS antenna end slogan is corresponding obtain the Reference Signal Received Power RSRP measured value of CSI-RS;
The measurement position of signaling Network Based instruction, or the measurement position based on the instruction of described UE higher layer message, or the measuring method based on the instruction of described UE higher layer message, carry out the received signal strength indicator rssi measurement of CSI-RS, obtain CSI-RSRSSI measured value;
According to formula RSRQ=N*RSRP/RSSI, calculating the measured value obtaining CSI-RSRSRQ, wherein, N measures the Resource Block RB quantity in the bandwidth of received signal strength indicator RSSI place, and RSRP is CSI-RSRSRP measured value, and RSSI is CSI-RSRSSI measured value.
2. the method for claim 1, it is characterised in that also include in described RRC signaling: position instruction message, instruction message in described position is for indicating described UE to carry out the position of CSI-RSRSSI measurement; The measurement position of described signaling Network Based instruction carries out CSI-RSRSSI measurement, obtains CSI-RSRSSI measured value, specifically includes:
Described UE, according to the position instruction message comprised in described RRC signaling, indicates in described position the measurement position of message instruction to carry out CSI-RSRSSI measurement, obtains CSI-RSRSSI measured value.
3. method as claimed in claim 2, it is characterized in that, the measurement position of described position instruction message instruction specifically includes: described UE carry out CSI-RSRSSI measure the OFDM symbol position at place and/or described UE carries out the subframe measuring place of CSI-RSRSSI.
4. the method for claim 1, it is characterised in that the measurement position of described signaling Network Based instruction carries out CSI-RSRSSI measurement, obtains CSI-RSRSSI measured value, specifically includes:
Described UE receives the measurement positional information that sends by RRC signaling of base station, and described measurement positional information includes described UE and carries out the OFDM symbol position measuring place of CSI-RSRSSI and/or described UE carries out the subframe at measurement place of CSI-RSRSSI;
The position that described UE indicates at described measurement positional information carries out CSI-RSRSSI measurement, obtains CSI-RSRSSI measured value.
5. the method for claim 1, it is characterised in that the described measurement position based on the instruction of described UE higher layer message carries out CSI-RSRSSI measurement, obtains CSI-RSRSSI measured value, specifically includes:
The physical layer of described UE selects different measurement positions to carry out CSI-RSRSSI measurement according to the positional information that described UE higher layer message indicates, obtaining CSI-RSRSSI measured value, the positional information of wherein said UE higher layer message instruction includes: the OFDM symbol in CSI-RSRSSI antenna end slogan, the subframe numbers of measurement and/or described subframe numbers.
6. the method for claim 1, it is characterised in that the described measuring method based on the instruction of described UE higher layer message carries out CSI-RSRSSI measurement, obtains CSI-RSRSSI measured value, specifically includes:
Described UE directly reads the RSSI value the last with current time from UE side shifting administrative unit, and as the measured value of CSI-RSRSSI, wherein, the physical layer that described RSSI value is described UE obtains based on the measurement of public reference signal CRS port 0.
7. the method as described in any one of claim 1-6, it is characterized in that, the described CSI-RS configuration according to the management collection configuration information instruction of described CSI-RS, and the sub-frame configuration of each CSI-RS, obtained the Reference Signal Received Power RSRP measured value of CSI-RS by the antenna port measurement that described CSI-RS antenna end slogan is corresponding, specifically include:
Frequency domain position on the subframe position that occurs according to the CSI-RS that the configuration of described CSI-RS is indicated, OFDM symbol position, CSI-RS place, CSI-RS place RB, the signal power on all CSI-RS subcarriers obtained by the CSI-RS measurement on the Measurement bandwidth of described antenna port, then all these performance numbers measured are carried out arithmetic average, obtain CSI-RSRSRP measured value in corresponding CSI-RS.
8. a descending multi-point signal apparatus for measuring quality, measures channel state information reference signals CSI-RS Reference Signal Received Quality RSRQ for user equipment (UE), it is characterised in that described device includes:
Receive unit, for receiving the CSI-RS management collection configuration information that base station is sent by radio resource control RRC signaling, described CSI-RS management collection configuration information includes: CSI-RS antenna end slogan, CSI-RS configure, and the sub-frame configuration of each CSI-RS;
Demodulating unit, for demodulating the RRC signaling that described reception unit receives, obtains CSI-RS management collection configuration information;
First measuring unit, for the CSI-RS configuration according to the management collection configuration information instruction of described CSI-RS, and the sub-frame configuration of each CSI-RS, the antenna port measurement that described CSI-RS antenna end slogan is corresponding obtain the Reference Signal Received Power RSRP measured value of CSI-RS;
Second measuring unit, for the measurement position that signaling Network Based indicates, or the measurement position based on the instruction of described UE higher layer message, or the measuring method based on the instruction of described UE higher layer message, carry out the received signal strength indicator rssi measurement of CSI-RS, obtain CSI-RSRSSI measured value;
Computing unit, for according to formula RSRQ=N*RSRP/RSSI, calculating the measured value obtaining CSI-RSRSRQ, wherein, N is the quantity of the Resource Block RB measuring received signal strength indicator RSSI place bandwidth, and RSRP is CSI-RSRSRP measured value, and RSSI is CSI-RSRSSI measured value.
9. device as claimed in claim 8, it is characterised in that described second measuring unit specifically for:
Positional information according to the instruction of described subscriber equipment higher layer message selects different measurement positions to carry out CSI-RSRSSI measurement, obtaining CSI-RSRSSI measured value, the positional information of wherein said subscriber equipment higher layer message instruction includes: the OFDM symbol in CSI-RSRSSI antenna end slogan, the subframe numbers of measurement and/or described subframe numbers.
10. device as claimed in claim 8, it is characterised in that described second measuring unit specifically for:
Reading the RSSI value the last with current time from described user equipment side mobility management unit, as the measured value of CSI-RSRSSI, wherein, the physical layer that described RSSI value is described UE obtains based on the measurement of public reference signal CRS port 0.
11. device as claimed in claim 8, it is characterised in that described second measuring unit specifically for:
Receiving the measurement positional information that sends by RRC signaling of base station, described measurement positional information includes described second measuring unit and carries out the OFDM symbol position measuring place of CSI-RSRSSI and/or described UE carries out the subframe at measurement place of CSI-RSRSSI;
Carry out CSI-RSRSSI measurement in the position of described measurement positional information instruction, obtain CSI-RSRSSI measured value.
12. the device as described in any one of claim 8-11, it is characterised in that described first measuring unit specifically for:
Frequency domain position on the subframe position that occurs according to the CSI-RS that the configuration of described CSI-RS is indicated, OFDM symbol position, CSI-RS place, CSI-RS place RB, the signal power on all CSI-RS subcarriers obtained by the CSI-RS measurement on the Measurement bandwidth of described antenna port, then all these performance numbers measured are carried out arithmetic average, obtain CSI-RSRSRP measured value in corresponding CSI-RS.
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| PCT/CN2013/074617 WO2013170690A1 (en) | 2012-05-18 | 2013-04-24 | Downlink multi-point signal quality measurement method and device |
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