CN109495413B - Method for transmitting synchronization signal block, method for measuring cell quality, base station and terminal - Google Patents
Method for transmitting synchronization signal block, method for measuring cell quality, base station and terminal Download PDFInfo
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- CN109495413B CN109495413B CN201710812737.7A CN201710812737A CN109495413B CN 109495413 B CN109495413 B CN 109495413B CN 201710812737 A CN201710812737 A CN 201710812737A CN 109495413 B CN109495413 B CN 109495413B
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
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- H04L27/2602—Signal structure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
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- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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Abstract
The invention provides a method for transmitting a synchronization signal block and measuring cell quality, a base station and a terminal, wherein the method comprises the following steps: transmitting a synchronization signal block, the synchronization signal block comprising: a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel; wherein vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are not used for data transmission; in the embodiment of the invention, in order to avoid that the terminal is scheduled to the vacant position of the synchronous signal block for data transmission after switching is finished, the vacant position of the synchronous signal block is set not to be used for data transmission, so that the cell quality measured by the terminal according to the synchronous signal block is more similar to the cell quality of the terminal in the cell actually, and the accuracy of cell quality measurement is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, a base station, and a terminal for transmitting a synchronization signal block and measuring cell quality.
Background
In the existing LTE (long term evolution) technology, a terminal device UE performs RRM (Radio Resource Management) measurement based on a Cell Reference Symbol (CRS), and assists a cell to perform handover decision and mobility Management by measuring reported cell quality RSRQ (reference signal received quality) by the UE.
In LTE, CRS is transmitted in full bandwidth, and in order to reduce the overhead of reference symbols, CRS is no longer available in 5G, so that the measurement function of replacing CRS with another reference signal is not required. One possible way is to make measurements using synchronization symbols. The transmission scheme of the synchronization symbol in 5G is shown in fig. 1: the synchronization symbols and the physical broadcast channel PBCH are transmitted in SS blocks (synchronization signal blocks) and are periodically transmitted, and each SS block comprises: the primary synchronization signal PSS, the secondary synchronization signal SSS and the broadcast channel PBCH are mapped in a PSS-PBCH-SSS-PBCH mode. The PSS-PBCH-SSS-PBCH occupies 1 OFDM symbol, that is, each SS block occupies 4 OFDM (Orthogonal Frequency Division Multiplexing) symbols in the time domain, wherein the PSS and the SSS occupy 12 PRB (physical resource block) in the Frequency domain, and the PBCH occupies 24 PRB in the Frequency domain.
Currently, the reference signal received quality RSRQ in LTE is defined as follows:
wherein, RSRP (Reference Signal Receiving Power) is the useful Signal Power measured on the Reference symbol CRS, and represents the cell Signal strength; RSSI (Received Signal Strength Indication) is the total power on the OFDM symbol containing the reference symbol CRS, including the useful signals, interference and noise of the data and reference signals; n is the number of resource blocks RB within the RSSI measurement bandwidth.
As can be seen from the definition of RSRQ, the measurement of the denominator RSSI of RSRQ includes REs (Resource elements) of the reference signal and REs of the data channel, so that the measurement quantity reflects the influence of the loads of the serving cell and the target cell.
The system bandwidth in 5G is large, and can be 400MHz at most. Although the UE measures the signal quality of the synchronization signal and data at the SS block location (24 PRBs), the SS block does not occupy all resource blocks RB in the frequency domain, and after the actual handover is completed, the UE may be scheduled to perform data transmission at another frequency domain location. In this case, the signal quality actually measured by the UE in the target cell may be very different from the signal quality measured by the UE before, so the measurement result of the SS block of the cell by the UE has little reference to the signal quality of the UE in the cell.
Disclosure of Invention
The invention aims to provide a method for transmitting a synchronization signal block and measuring cell quality, a base station and a terminal, so as to solve the problem of inaccurate cell quality measurement caused by a large difference between the actual signal quality of the terminal in a cell and the signal measurement measured before the terminal in the prior art.
In order to solve the above problem, an embodiment of the present invention provides a method for transmitting a synchronization signal block, including:
transmitting a synchronization signal block, the synchronization signal block comprising: a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel;
wherein the vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are not used for data transmission.
Wherein the synchronization signal block is transmitted over a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols;
the unoccupied positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel comprise:
the OFDM symbol where the main synchronization signal is located is a resource block which is not occupied by the main synchronization signal; and the resource block which is not occupied by the auxiliary synchronization signal on the OFDM symbol where the auxiliary synchronization signal is located.
Wherein the unoccupied positions in the synchronization signal block that are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel include:
a subcarrier whose time domain position is the same as that of the primary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the primary synchronization signal; and the number of the first and second groups,
and the time domain position is the same as that of the auxiliary synchronizing signal, and the frequency domain position is a subcarrier which is coincident with the frequency domain position of the physical broadcast channel but not coincident with the frequency domain position of the auxiliary synchronizing signal.
The synchronization signal block further comprises a load signal sequence, and the load signal sequence is used for indicating load information of a cell;
and the vacant positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel are used for bearing the load signal sequence.
Wherein the load signal sequence is a dummy data sequence; or, the load signal sequence is a preset reference symbol.
Wherein, the power value of the load signal sequence is used for simulating the load information of the cell; alternatively, the first and second electrodes may be,
the number of occupied resource elements of the load signal sequence in the synchronization signal block is used for simulating load information of a cell.
The embodiment of the invention also provides a cell quality measuring method, which comprises the following steps:
receiving a synchronization signal block, the synchronization signal block comprising: a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel; wherein vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are not used for data transmission;
and analyzing the synchronous signal block to obtain the cell quality.
Wherein the step of receiving the synchronization signal block comprises:
receiving a synchronization signal block over a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols;
the unoccupied positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel comprise:
the OFDM symbol where the main synchronization signal is located is a resource block which is not occupied by the main synchronization signal; and the resource block which is not occupied by the auxiliary synchronization signal on the OFDM symbol where the auxiliary synchronization signal is located.
Wherein the unoccupied positions in the synchronization signal block that are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel include:
a subcarrier whose time domain position is the same as that of the primary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the primary synchronization signal; and the number of the first and second groups,
and the time domain position is the same as that of the auxiliary synchronizing signal, and the frequency domain position is a subcarrier which is coincident with the frequency domain position of the physical broadcast channel but not coincident with the frequency domain position of the auxiliary synchronizing signal.
The synchronization signal block further comprises a load signal sequence, and the load signal sequence is used for indicating load information of a cell;
and the vacant positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel are used for bearing the load signal sequence.
Wherein the load signal sequence is a dummy data sequence; or, the load signal sequence is a preset reference symbol.
Wherein, the power value of the load signal sequence is used for simulating the load information of the cell; alternatively, the first and second electrodes may be,
the number of occupied resource elements of the load signal sequence in the synchronization signal block is used for simulating load information of a cell.
The embodiment of the invention also provides a base station, which comprises a processor and a transceiver, wherein the processor is used for executing the following processes:
transmitting a synchronization signal block, the synchronization signal block comprising: a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel;
wherein the vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are not used for data transmission.
Wherein the synchronization signal block is transmitted over a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols;
the unoccupied positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel comprise:
the OFDM symbol where the main synchronization signal is located is a resource block which is not occupied by the main synchronization signal; and the resource block which is not occupied by the auxiliary synchronization signal on the OFDM symbol where the auxiliary synchronization signal is located.
Wherein the unoccupied positions in the synchronization signal block that are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel include:
a subcarrier whose time domain position is the same as that of the primary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the primary synchronization signal; and the number of the first and second groups,
and the time domain position is the same as that of the auxiliary synchronizing signal, and the frequency domain position is a subcarrier which is coincident with the frequency domain position of the physical broadcast channel but not coincident with the frequency domain position of the auxiliary synchronizing signal.
The synchronization signal block further comprises a load signal sequence, and the load signal sequence is used for indicating load information of a cell;
and the vacant positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel are used for bearing the load signal sequence.
Wherein the load signal sequence is a dummy data sequence; or, the load signal sequence is a preset reference symbol.
Wherein, the power value of the load signal sequence is used for simulating the load information of the cell; alternatively, the first and second electrodes may be,
the number of occupied resource elements of the load signal sequence in the synchronization signal block is used for simulating load information of a cell.
The embodiment of the invention also provides a terminal, which comprises a processor and a transceiver, wherein the processor is used for executing the following processes:
receiving a synchronization signal block, the synchronization signal block comprising: a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel; wherein vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are not used for data transmission;
and analyzing the synchronous signal block to obtain the cell quality.
Wherein the processor is further configured to perform the following process:
receiving a synchronization signal block over a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols;
wherein the unoccupied positions in the synchronization signal block that are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel include:
the OFDM symbol where the main synchronization signal is located is a resource block which is not occupied by the main synchronization signal; and the resource block which is not occupied by the auxiliary synchronization signal on the OFDM symbol where the auxiliary synchronization signal is located.
Wherein the unoccupied positions in the synchronization signal block that are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel include:
a subcarrier whose time domain position is the same as that of the primary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the primary synchronization signal; and the number of the first and second groups,
and the time domain position is the same as that of the auxiliary synchronizing signal, and the frequency domain position is a subcarrier which is coincident with the frequency domain position of the physical broadcast channel but not coincident with the frequency domain position of the auxiliary synchronizing signal.
The synchronization signal block further comprises a load signal sequence, and the load signal sequence is used for indicating load information of a cell;
and the vacant positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel are used for bearing the load signal sequence.
Wherein the load signal sequence is a dummy data sequence; or, the load signal sequence is a preset reference symbol.
Wherein, the power value of the load signal sequence is used for simulating the load information of the cell; alternatively, the first and second electrodes may be,
the number of occupied resource elements of the load signal sequence in the synchronization signal block is used for simulating load information of a cell.
The embodiment of the present invention further provides a communication device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the transmission method of the synchronization signal block as described above when executing the program;
alternatively, the processor implements the cell quality measurement method as described above when executing the program.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps in the transmission method of the synchronization signal block as described above;
alternatively, the program realizes the steps in the cell quality measurement method as described above when executed by a processor.
The technical scheme of the invention at least has the following beneficial effects:
in the method for transmitting the synchronization signal block and measuring the cell quality, the base station and the terminal of the embodiment of the invention, in order to avoid that the terminal is scheduled to the vacant position of the synchronization signal block for data transmission after the switching is finished, the vacant position of the synchronization signal block is set not to be used for data transmission, so that the cell quality measured by the terminal according to the synchronization signal block is more similar to the cell quality of the terminal in the cell, the cell quality measured by the terminal based on the synchronization signal block has a larger reference value to the actual cell quality, and the accuracy of cell quality measurement is improved.
Drawings
Fig. 1 is a flowchart illustrating steps of a method for transmitting a synchronization signal block according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a synchronization signal block in a transmission method of the synchronization signal block and a cell quality measurement method according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating steps of a method for measuring cell quality according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a method for transmitting a synchronization signal block, including:
wherein the vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are not used for data transmission.
In the above embodiment of the present invention, as shown in fig. 2, the synchronization signal block includes: primary synchronization signals PSS, secondary synchronization signals SSS and a physical broadcast channel PBCH; the mapping mode is PSS-PBCH-SSS-PBCH. The vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are shown by the shaded portions in fig. 2. Specifically, the vacant position is set to be unavailable for data transmission. Note that the synchronization signal block is transmitted periodically.
Specifically, the synchronization signal block is transmitted on a plurality of OFDM symbols (the synchronization signal block shown in fig. 2 occupies 4 OFDM symbols in the time domain);
the unoccupied positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel comprise:
the OFDM symbol where the main synchronization signal is located is a resource block which is not occupied by the main synchronization signal; and the resource block which is not occupied by the auxiliary synchronization signal on the OFDM symbol where the auxiliary synchronization signal is located; as shown in phantom in fig. 2.
Or, the unoccupied positions in the synchronization signal block that are not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel include:
a subcarrier whose time domain position is the same as that of the primary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the primary synchronization signal; and the number of the first and second groups,
a subcarrier whose time domain position is the same as that of the secondary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the secondary synchronization signal; as shown in phantom in fig. 2.
Further, in order to make the cell quality measured by the terminal based on the cell quality measurement of the synchronization signal block more accurate, the synchronization signal block in the embodiment of the present invention further includes a load signal sequence, and the load signal sequence is used for indicating the load information of the cell;
and the vacant positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel are used for bearing the load signal sequence.
It should be noted that after the vacant positions of the synchronization signal blocks carry the load signal sequences, the cell quality measured by the terminal analyzing the synchronization signal blocks is more accurate. If the vacant position is used for carrying the load signal sequence, the vacant position is also set as a symbol which is not used for transmitting other purposes; however, the load signal sequence may occupy the vacant positions of the synchronization signal blocks, or may not occupy the vacant positions of the synchronization signal blocks, and is not particularly limited herein.
Further, the load information of the cell is actual load information of the cell; alternatively, the first and second electrodes may be,
the load information of the cell is load information obtained by weighting the actual load information of the cell.
Preferably, the actual load information of the cell is an average load condition of the cell in a past preset time period. Furthermore, how to weight the actual load information of the cell may be preset by the base station or the cell, and is not limited herein; for example, the high frequency cell load weight is lower, and the low frequency cell load weight is higher; or, the cell load weight for high frequencies is higher, and the cell load weight for low frequencies is lower.
Preferably, the load signal sequence is a dummy data sequence, that is, the data transmitted by the load signal sequence only reflects the cell load information, but not the real data.
Or, the load signal sequence is a preset reference symbol, such as a demodulation reference signal DMRS, or a reference symbol formed by another sequence.
Further, in the above embodiment of the present invention, after determining the load information of the cell itself, the cell adds the corresponding load information to the load signal sequence, and when the load signal sequence occupies the vacant position of the synchronization signal block, the power value of the load signal sequence is used to simulate the load information of the cell, that is, the load signal sequence is mapped on a continuous resource block, and the load information of the cell is simulated by adjusting the power value of the load signal sequence; alternatively, the first and second electrodes may be,
when the load signal sequence does not occupy the vacant positions of the synchronization signal block, the number of occupied resource elements RE of the load signal sequence in the synchronization signal block is used for simulating the load information of the cell, that is, the mapping position of the load signal sequence is not fixed, the load information of the cell is simulated by adjusting the number of occupied resource elements of the load signal sequence, for example, the load of the cell is 67%, and then the number of occupied resource elements of the load signal sequence occupies 2/3 of the number of resource elements of the whole vacant positions.
In summary, in the transmission method of the synchronization signal block provided in the above embodiment of the present invention, in order to avoid that the terminal is scheduled to the vacant position of the synchronization signal block for data transmission after completing the handover, the vacant position of the synchronization signal block is set not to be used for data transmission, so that the cell quality measured by the terminal according to the synchronization signal block is closer to the cell quality of the terminal in the cell, and the cell quality measured by the terminal based on the synchronization signal block before has a larger reference value to the actual cell quality; and further transmitting a load signal sequence used for indicating the load information of the cell at the vacant position of the synchronous signal block, so that the terminal can determine the cell quality based on the load information of the cell, and the accuracy of cell quality measurement is improved.
As shown in fig. 3, an embodiment of the present invention further provides a method for measuring cell quality, including:
Note that the terminal side periodically receives the synchronization signal block.
And step 32, analyzing the synchronous signal block to obtain the cell quality.
In the above embodiment of the present invention, as shown in fig. 2, the synchronization signal block includes: primary synchronization signals PSS, secondary synchronization signals SSS and a physical broadcast channel PBCH; the mapping mode is PSS-PBCH-SSS-PBCH. The vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are shown by the shaded portions in fig. 2. Specifically, the vacant position is set to be unavailable for data transmission.
Preferably, step 31 includes:
receiving a synchronization signal block over a plurality of orthogonal frequency division multiplexing OFDM symbols (the synchronization signal block shown in fig. 2 occupies 4 OFDM symbols in the time domain);
wherein the unoccupied positions in the synchronization signal block that are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel include:
the OFDM symbol where the main synchronization signal is located is a resource block which is not occupied by the main synchronization signal; and the resource block which is not occupied by the auxiliary synchronization signal on the OFDM symbol where the auxiliary synchronization signal is located; as shown in phantom in fig. 2.
Or, the unoccupied positions in the synchronization signal block that are not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel include:
a subcarrier whose time domain position is the same as that of the primary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the primary synchronization signal; and the number of the first and second groups,
a subcarrier whose time domain position is the same as that of the secondary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the secondary synchronization signal; as shown in phantom in fig. 2.
Further, in order to make the cell quality measured by the terminal based on the cell quality measurement of the synchronization signal block more accurate, the synchronization signal block in the embodiment of the present invention further includes a load signal sequence, and the load signal sequence is used for indicating the load information of the cell;
and the vacant positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel are used for bearing the load signal sequence.
It should be noted that after the vacant positions of the synchronization signal blocks carry the load signal sequences, the cell quality measured by the terminal analyzing the synchronization signal blocks is more accurate. If the vacant position is used for carrying the load signal sequence, the vacant position is also set as a symbol which is not used for transmitting other purposes; however, the load signal sequence may occupy the vacant positions of the synchronization signal blocks, or may not occupy the vacant positions of the synchronization signal blocks, and is not particularly limited herein.
Further, the load information of the cell is actual load information of the cell; alternatively, the first and second electrodes may be,
the load information of the cell is load information obtained by weighting the actual load information of the cell.
Preferably, the actual load information of the cell is an average load condition of the cell in a past preset time period. Furthermore, how to weight the actual load information of the cell may be preset by the base station or the cell, and is not limited herein; for example, the high frequency cell load weight is lower, and the low frequency cell load weight is higher; or, the cell load weight for high frequencies is higher, and the cell load weight for low frequencies is lower.
Preferably, the load signal sequence is a dummy data sequence, that is, the data transmitted by the load signal sequence only reflects the cell load information, but not the real data.
Or, the load signal sequence is a preset reference symbol, such as a demodulation reference signal DMRS, or a reference symbol formed by another sequence.
Further, in the above embodiment of the present invention, after determining the load information of the cell itself, the cell adds the corresponding load information to the load signal sequence, and when the load signal sequence occupies the vacant position of the synchronization signal block, the power value of the load signal sequence is used to simulate the load information of the cell, that is, the load signal sequence is mapped on a continuous resource block, and the load information of the cell is simulated by adjusting the power value of the load signal sequence; alternatively, the first and second electrodes may be,
when the load signal sequence does not occupy the vacant positions of the synchronization signal block, the number of occupied resource elements of the load signal sequence in the synchronization signal block is used for simulating the load information of the cell, that is, the mapping position of the load signal sequence is not fixed, the load information of the cell is simulated by adjusting the number of occupied resource elements of the load signal sequence, for example, the load of the cell is 67%, and then the number of occupied resource elements of the load signal sequence occupies 2/3 of the number of resource elements of the whole vacant positions.
Further, in the above embodiment of the present invention, the cell quality in step 32 is identified by reference signal received quality RSRQ, and the calculation formula of RSRQ is as follows:
where N is the number of resource blocks RB in the RSSI measurement bandwidth, the minimum measurement bandwidth is the bandwidth of the synchronization signal block, that is, 24 physical resource blocks PRB, where N is 24.
The reference signal received power RSRP is the average of the useful signal power over each resource block RE carrying the secondary synchronization signal SSS and/or the physical broadcast channel within the measurement bandwidth, where the measurement bandwidth is the same as the measurement bandwidth of the RSSI.
The RSSI is an average value of the total power within the measurement bandwidth on a specific OFDM symbol, wherein the specific OFDM symbol is an OFDM symbol containing PSS/SSS/PBCH in a synchronization signal block; the total power comprises co-channel serving cells and non-serving cells, interference of adjacent channels, noise useful signals, interference and thermal noise. I.e. the total power of all positions containing synchronization symbols (SSS and PSS), PBCH and payload signal sequences.
In the method for measuring cell quality provided in the above embodiment of the present invention, in order to avoid that the terminal is scheduled to the vacant position of the synchronization signal block for data transmission after completing handover, the vacant position of the synchronization signal block is set not to be used for data transmission, so that the cell quality measured by the terminal according to the synchronization signal block is closer to the cell quality of the terminal in the cell actually, and the cell quality measured by the terminal based on the synchronization signal block before has a larger reference value for the actual cell quality; and further transmitting a load signal sequence used for indicating the load information of the cell at the vacant position of the synchronous signal block, so that the terminal can determine the cell quality based on the load information of the cell, and the accuracy of cell quality measurement is improved.
As shown in fig. 4, an embodiment of the present invention further provides a base station, which includes a processor 400 and a transceiver 410, where the processor 400 is configured to perform the following processes:
transmitting a synchronization signal block, the synchronization signal block comprising: a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel;
wherein the vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are not used for data transmission.
Preferably, the synchronization signal block is transmitted over a plurality of OFDM symbols;
the unoccupied positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel comprise:
the OFDM symbol where the main synchronization signal is located is a resource block which is not occupied by the main synchronization signal; and the resource block which is not occupied by the auxiliary synchronization signal on the OFDM symbol where the auxiliary synchronization signal is located.
Preferably, the vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel include:
a subcarrier whose time domain position is the same as that of the primary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the primary synchronization signal; and the number of the first and second groups,
and the time domain position is the same as that of the auxiliary synchronizing signal, and the frequency domain position is a subcarrier which is coincident with the frequency domain position of the physical broadcast channel but not coincident with the frequency domain position of the auxiliary synchronizing signal.
Preferably, the synchronization signal block further includes a loading signal sequence, and the loading signal sequence is used for indicating loading information of a cell;
and the vacant positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel are used for bearing the load signal sequence.
Preferably, the load information of the cell is actual load information of the cell; alternatively, the first and second electrodes may be,
the load information of the cell is load information obtained by weighting the actual load information of the cell.
Preferably, the load signal sequence is a dummy data sequence; or, the load signal sequence is a preset reference symbol.
Preferably, the power value of the load signal sequence is used for simulating load information of a cell; alternatively, the first and second electrodes may be,
the number of occupied resource elements of the load signal sequence in the synchronization signal block is used for simulating load information of a cell.
In the embodiment of the invention, in order to avoid that the terminal is dispatched to the vacant position of the synchronous signal block for data transmission after switching is finished, the vacant position of the synchronous signal block is set not to be used for data transmission, so that the cell quality measured by the terminal according to the synchronous signal block is more similar to the cell quality of the terminal in the cell actually, and the cell quality measured by the terminal based on the synchronous signal block has a larger reference value to the actual cell quality; and further transmitting a load signal sequence used for indicating the load information of the cell at the vacant position of the synchronous signal block, so that the terminal can determine the cell quality based on the load information of the cell, and the accuracy of cell quality measurement is improved.
It should be noted that the base station provided in the embodiments of the present invention is a base station capable of executing the transmission method of the synchronization signal block, and all embodiments of the transmission method of the synchronization signal block are applicable to the base station and can achieve the same or similar beneficial effects.
An embodiment of the present invention further provides a communication device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the transmission method of the synchronization signal block as described above when executing the program.
The communication device is a base station, and specifically the base station includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements each process in the above-described embodiment of the transmission method for a synchronization signal block when executing the program, and can achieve the same technical effect, and details are not repeated here to avoid repetition.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements each process in the above-described transmission method for a synchronization signal block, and can achieve the same technical effect, and details are not described here to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
As shown in fig. 5, an embodiment of the present invention further provides a terminal, which includes a processor 500 and a transceiver 510, and the terminal further includes a user interface 520, where the processor 500 is configured to perform the following processes:
receiving a synchronization signal block, the synchronization signal block comprising: a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel; wherein vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are not used for data transmission;
and analyzing the synchronous signal block to obtain the cell quality.
Preferably, the processor 500 is further configured to perform the following processes:
receiving a synchronization signal block over a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols;
wherein the unoccupied positions in the synchronization signal block that are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel include:
the OFDM symbol where the main synchronization signal is located is a resource block which is not occupied by the main synchronization signal; and the resource block which is not occupied by the auxiliary synchronization signal on the OFDM symbol where the auxiliary synchronization signal is located.
Preferably, the vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel include:
a subcarrier whose time domain position is the same as that of the primary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the primary synchronization signal; and the number of the first and second groups,
and the time domain position is the same as that of the auxiliary synchronizing signal, and the frequency domain position is a subcarrier which is coincident with the frequency domain position of the physical broadcast channel but not coincident with the frequency domain position of the auxiliary synchronizing signal.
Preferably, the synchronization signal block further includes a loading signal sequence, and the loading signal sequence is used for indicating loading information of a cell;
and the vacant positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel are used for bearing the load signal sequence.
Preferably, the load information of the cell is actual load information of the cell; alternatively, the first and second electrodes may be,
the load information of the cell is load information obtained by weighting the actual load information of the cell.
Preferably, the load signal sequence is a dummy data sequence; or, the load signal sequence is a preset reference symbol.
Preferably, the power value of the load signal sequence is used for simulating load information of a cell; alternatively, the first and second electrodes may be,
the number of occupied resource elements of the load signal sequence in the synchronization signal block is used for simulating load information of a cell.
In the embodiment of the invention, in order to avoid that the terminal is dispatched to the vacant position of the synchronous signal block for data transmission after switching is finished, the vacant position of the synchronous signal block is set not to be used for data transmission, so that the cell quality measured by the terminal according to the synchronous signal block is more similar to the cell quality of the terminal in the cell actually, and the cell quality measured by the terminal based on the synchronous signal block has a larger reference value to the actual cell quality; and further transmitting a load signal sequence used for indicating the load information of the cell at the vacant position of the synchronous signal block, so that the terminal can determine the cell quality based on the load information of the cell, and the accuracy of cell quality measurement is improved.
It should be noted that, the terminal provided in the embodiments of the present invention is a terminal capable of executing the cell quality measurement method, and all embodiments of the cell quality measurement method are applicable to the terminal, and can achieve the same or similar beneficial effects.
An embodiment of the present invention further provides a communication device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the cell quality measurement method as described above when executing the program. The communication device is a terminal, and specifically, the terminal includes a memory, a processor, and a computer program that is stored in the memory and can be run on the processor, and when the processor executes the program, the processor implements each process in the above-described embodiment of the cell quality measurement method, and can achieve the same technical effect, and details are not described here to avoid repetition.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements each process in the above-described cell quality measurement method embodiment, and can achieve the same technical effect, and details are not described here to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block or blocks.
These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (22)
1. A method for transmitting a synchronization signal block, comprising:
transmitting a synchronization signal block, the synchronization signal block comprising: a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel;
wherein vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are not used for data transmission;
the synchronization signal block further comprises a load signal sequence, and the load signal sequence is used for indicating load information of a cell;
and the vacant positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel are used for bearing the load signal sequence.
2. The method of claim 1, wherein the synchronization signal block is transmitted over a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols;
the unoccupied positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel comprise:
the OFDM symbol where the main synchronization signal is located is a resource block which is not occupied by the main synchronization signal; and the resource block which is not occupied by the auxiliary synchronization signal on the OFDM symbol where the auxiliary synchronization signal is located.
3. The method of claim 1, wherein the synchronization signal block having no vacant positions occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel comprises:
a subcarrier whose time domain position is the same as that of the primary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the primary synchronization signal; and the number of the first and second groups,
and the time domain position is the same as that of the auxiliary synchronizing signal, and the frequency domain position is a subcarrier which is coincident with the frequency domain position of the physical broadcast channel but not coincident with the frequency domain position of the auxiliary synchronizing signal.
4. The method of claim 1, wherein the load signal sequence is a dummy data sequence; or, the load signal sequence is a preset reference symbol.
5. The method of claim 1,
the power value of the load signal sequence is used for simulating load information of a cell; alternatively, the first and second electrodes may be,
the number of occupied resource elements of the load signal sequence in the synchronization signal block is used for simulating load information of a cell.
6. A method for measuring cell quality, comprising:
receiving a synchronization signal block, the synchronization signal block comprising: a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel; wherein vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are not used for data transmission;
analyzing the synchronous signal block to obtain the cell quality;
the synchronization signal block further comprises a load signal sequence, and the load signal sequence is used for indicating load information of a cell;
and the vacant positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel are used for bearing the load signal sequence.
7. The method of claim 6, wherein the step of receiving the synchronization signal block comprises:
receiving a synchronization signal block over a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols;
the unoccupied positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel comprise:
the OFDM symbol where the main synchronization signal is located is a resource block which is not occupied by the main synchronization signal; and the resource block which is not occupied by the auxiliary synchronization signal on the OFDM symbol where the auxiliary synchronization signal is located.
8. The method of claim 6, wherein the synchronization signal block having no vacant positions occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel comprises:
a subcarrier whose time domain position is the same as that of the primary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the primary synchronization signal; and the number of the first and second groups,
and the time domain position is the same as that of the auxiliary synchronizing signal, and the frequency domain position is a subcarrier which is coincident with the frequency domain position of the physical broadcast channel but not coincident with the frequency domain position of the auxiliary synchronizing signal.
9. The method of claim 6, wherein the load signal sequence is a dummy data sequence; or, the load signal sequence is a preset reference symbol.
10. The method of claim 6, wherein the power value of the load signal sequence is used to simulate load information of a cell; alternatively, the first and second electrodes may be,
the number of occupied resource elements of the load signal sequence in the synchronization signal block is used for simulating load information of a cell.
11. A base station comprising a processor and a transceiver, wherein the processor is configured to perform the following:
transmitting a synchronization signal block, the synchronization signal block comprising: a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel;
wherein vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are not used for data transmission;
the synchronization signal block further comprises a load signal sequence, and the load signal sequence is used for indicating load information of a cell;
and the vacant positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel are used for bearing the load signal sequence.
12. The base station of claim 11, wherein the synchronization signal block is transmitted over a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols;
the unoccupied positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel comprise:
the OFDM symbol where the main synchronization signal is located is a resource block which is not occupied by the main synchronization signal; and the resource block which is not occupied by the auxiliary synchronization signal on the OFDM symbol where the auxiliary synchronization signal is located.
13. The base station of claim 11, wherein the unoccupied locations in the synchronization signal block that are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel comprise:
a subcarrier whose time domain position is the same as that of the primary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the primary synchronization signal; and the number of the first and second groups,
and the time domain position is the same as that of the auxiliary synchronizing signal, and the frequency domain position is a subcarrier which is coincident with the frequency domain position of the physical broadcast channel but not coincident with the frequency domain position of the auxiliary synchronizing signal.
14. The base station of claim 11, wherein the loading signal sequence is a dummy data sequence; or, the load signal sequence is a preset reference symbol.
15. The base station of claim 11, wherein the power value of the loading signal sequence is used to simulate loading information of a cell; alternatively, the first and second electrodes may be,
the number of occupied resource elements of the load signal sequence in the synchronization signal block is used for simulating load information of a cell.
16. A terminal comprising a processor and a transceiver, wherein the processor is configured to perform the following:
receiving a synchronization signal block, the synchronization signal block comprising: a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel; wherein vacant positions in the synchronization signal block not occupied by the primary synchronization signal, the secondary synchronization signal, and the physical broadcast channel are not used for data transmission;
analyzing the synchronous signal block to obtain the cell quality;
the synchronization signal block further comprises a load signal sequence, and the load signal sequence is used for indicating load information of a cell;
and the vacant positions in the synchronization signal block which are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel are used for bearing the load signal sequence.
17. The terminal of claim 16, wherein the processor is further configured to perform the following process:
receiving a synchronization signal block over a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols;
wherein the unoccupied positions in the synchronization signal block that are not occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel include:
the OFDM symbol where the main synchronization signal is located is a resource block which is not occupied by the main synchronization signal; and the resource block which is not occupied by the auxiliary synchronization signal on the OFDM symbol where the auxiliary synchronization signal is located.
18. The terminal of claim 16, wherein the synchronization signal block having no vacant positions occupied by the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel comprises:
a subcarrier whose time domain position is the same as that of the primary synchronization signal and whose frequency domain position coincides with that of the physical broadcast channel but does not coincide with that of the primary synchronization signal; and the number of the first and second groups,
and the time domain position is the same as that of the auxiliary synchronizing signal, and the frequency domain position is a subcarrier which is coincident with the frequency domain position of the physical broadcast channel but not coincident with the frequency domain position of the auxiliary synchronizing signal.
19. The terminal of claim 16, wherein the load signal sequence is a dummy data sequence; or, the load signal sequence is a preset reference symbol.
20. The terminal of claim 16, wherein the power value of the loading signal sequence is used to simulate loading information of a cell; alternatively, the first and second electrodes may be,
the number of occupied resource elements of the load signal sequence in the synchronization signal block is used for simulating load information of a cell.
21. A communication device comprising a memory, a processor and a computer program stored on the memory and executable on the processor; it is characterized in that the preparation method is characterized in that,
the processor, when executing the program, implements the method of transmitting the synchronization signal block according to any one of claims 1 to 5;
alternatively, the processor implements the method of measuring cell quality according to any one of claims 6 to 10 when executing the program.
22. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the steps in the method for transmission of a synchronization signal block according to any one of claims 1 to 5;
alternatively, the program is executed by a processor for implementing the steps in the method for measuring cell quality according to any one of claims 6 to 10.
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| CN112312331B (en) * | 2020-10-20 | 2022-07-08 | 捷开通讯(深圳)有限公司 | Physical broadcast channel and information transmission method and device |
| WO2022141007A1 (en) * | 2020-12-29 | 2022-07-07 | 海能达通信股份有限公司 | Signal transmission method and device, base station, terminal, and computer storage medium |
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