CN113037422A - Cell reference signal sending method, device, storage medium and computer equipment - Google Patents
Cell reference signal sending method, device, storage medium and computer equipment Download PDFInfo
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- CN113037422A CN113037422A CN201911355122.1A CN201911355122A CN113037422A CN 113037422 A CN113037422 A CN 113037422A CN 201911355122 A CN201911355122 A CN 201911355122A CN 113037422 A CN113037422 A CN 113037422A
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- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
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Abstract
The embodiment of the invention provides a cell reference signal sending method, a device, a storage medium and computer equipment. In the technical scheme provided by the embodiment of the invention, the number of occupied resource blocks in the next transmission time interval of a cell is measured; judging whether the number of the occupied resource blocks is greater than 0; if the number of the occupied resource blocks is larger than 0, resetting a preset periodic timer and sending the cell reference signal by adopting the occupied resource blocks and a plurality of central resource blocks, so that the sending power of the cell reference signal can be reduced, and the interference caused by the cell reference signal is eliminated.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of communications technologies, and in particular, to a cell reference signal sending method, an apparatus, a storage medium, and a computer device.
[ background of the invention ]
Time Division Long Term Evolution (TD-LTE) system uplink single carrier adopts Discrete Fourier Transform Spread Orthogonal Frequency Division multiplexing (DFT-SOFDM) technology, downlink adopts Orthogonal Frequency Division Multiple Access (OFDMA) technology, so that it is possible for adjacent cells to adopt the same Frequency resource for networking. Cell Reference Signal (CRS) is continuously transmitted over the whole bandwidth of a Cell and all subframes, which effectively improves the spectrum efficiency, but also brings interference among co-frequency carriers of multiple neighboring cells. The current inter-cell co-frequency interference is the main interference in the TD-LTE system, so how to effectively suppress the inter-cell co-frequency interference becomes a key problem to further improve the performance and the Service Quality of the TD-LTE network while ensuring the access network spectrum utilization and the Quality of Service (QOS) in the TD-LTE system.
The physical layer of the TD-LTE system has no suppression mechanism aiming at the same frequency interference among the cells, and the adopted same frequency networking mode can cause users between adjacent cells to use the same time frequency resource at the same time, thereby highlighting the same frequency interference among the adjacent cells. Because the same frequency interference during the same frequency networking can cause the reduction of the cell coverage radius, in an area with dense users, the cell overlapping coverage needs to be carried out in order to avoid the cell coverage shrinkage caused by the cell radius convergence caused by the respiratory effect generated by excessive user access quantity, but the increase of the overlapping area can improve the adjacent cell same frequency interference. It is assumed that Resource Blocks (RBs) that can be allocated by each cell according to user requirements are fixed, and different users in the same cell use different RBs. When the load of a cell increases, the probability that the users of the adjacent cells use the same RB at the same time also increases, which causes inter-cell interference. In this process, the decrease of the Reference Signal to Interference and Noise Ratio (RS-SINR) value of the cell causes the decrease of the channel transmission rate, which greatly reduces the access performance and the service QOS of the cell edge users.
At present, aiming at inter-cell co-frequency interference, a related technology adopts an inter-cell interference coordination randomization method, an inter-cell interference elimination method and an inter-cell interference suppression method, and mainly aims to eliminate and suppress inter-cell interference caused by data transmission of services and control channels, but the interference caused by cell reference signals is not greatly eliminated.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a method, an apparatus, a storage medium, and a computer device for sending a cell reference signal, which are capable of eliminating interference caused by the cell reference signal.
In a first aspect, an embodiment of the present invention provides a method for sending a cell reference signal, where the method includes:
measuring the number of occupied resource blocks in the next transmission time interval of the cell;
judging whether the number of the occupied resource blocks is greater than 0;
if the number of the occupied resource blocks is larger than 0, resetting a preset periodic timer and sending the cell reference signal by adopting the occupied resource blocks and a plurality of central resource blocks.
Optionally, before measuring the number of occupied resource blocks in the next transmission time interval of the cell, the method further includes:
acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell;
calculating the utilization rate of the resource blocks in the current transmission time interval of the cell according to the number of the idle resource blocks and the number of the occupied resource blocks in the current transmission time interval of the cell;
judging whether the resource block utilization rate is greater than a first threshold value;
and if the resource block utilization rate is judged to be larger than the first threshold value, continuing to execute the step of measuring the number of occupied resource blocks in the next transmission time interval of the cell.
Optionally, after determining whether the resource block utilization is greater than a first threshold, the method further includes:
if the resource block utilization rate is judged to be less than or equal to the first threshold value, reducing the sending power of the cell reference signal to the designated power, and sending the cell reference signal according to the designated power; and continuing to execute the step of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
Optionally, after determining whether the number of occupied resource blocks is greater than 0, the method further includes:
if the occupied resource block number is judged to be less than or equal to 0, judging whether the periodic timer is in an open state;
if the periodic timer is judged to be in the open state, judging whether the periodic timer is overtime;
if the periodic timer is judged to be overtime, resetting the periodic timer and sending the cell reference signal once by using the full bandwidth, and continuing to execute the step of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell;
and if the periodic timer is not overtime, adopting a plurality of central resource blocks to send the cell reference signals, and continuously executing the step of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
If the periodic timer is judged not to be in an open state, a plurality of central resource blocks are adopted to send the cell reference signals; and continuing to execute the step of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
Optionally, if it is determined that the number of occupied resource blocks is greater than 0, after resetting a preset periodic timer and sending a cell reference signal by using the occupied resource blocks and a plurality of central resource blocks, the method further includes:
and continuing to execute the step of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
Optionally, the calculating, according to the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell, a resource block utilization rate in the current transmission time interval of the cell specifically includes:
adding the number of the idle resource blocks and the number of the occupied resource blocks to obtain the total number of the resource blocks in the current transmission time interval of the cell;
and dividing the occupied resource block number by the total number of the resource blocks to obtain the utilization rate of the resource blocks in the current transmission time interval of the cell.
Optionally, the plurality of central resource blocks comprises 6 central resource blocks.
In another aspect, an embodiment of the present invention provides a cell reference signal transmitting apparatus, where the apparatus includes:
the measuring module is used for measuring the number of occupied resource blocks in the next transmission time interval of the cell;
the second judgment module is used for judging whether the number of the occupied resource blocks is greater than 0;
the reset module is used for resetting the preset periodic timer if the second judging module judges that the number of the occupied resource blocks is more than 0;
and the sending module is used for sending the cell reference signal by adopting the occupied resource block and a plurality of central resource blocks.
On the other hand, an embodiment of the present invention provides a storage medium, where the storage medium includes a stored program, and when the program runs, a device in which the storage medium is located is controlled to execute the above-mentioned cell reference signal transmission method.
In another aspect, an embodiment of the present invention provides a computer device, which includes a memory and a processor, where the memory is configured to store information including program instructions, and the processor is configured to control execution of the program instructions, where the program instructions are loaded into and executed by the processor to implement the steps of the above-mentioned cell reference signal transmission method.
In the technical solutions of the cell reference signal transmission method, the device, the storage medium and the computer device provided by the embodiments of the present invention, the number of occupied resource blocks in the next transmission time interval of a cell is measured; judging whether the number of the occupied resource blocks is greater than 0; if the number of the occupied resource blocks is larger than 0, resetting a preset periodic timer and sending the cell reference signal by adopting the occupied resource blocks and a plurality of central resource blocks, so that the sending power of the cell reference signal can be reduced, and the interference caused by the cell reference signal is eliminated.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a flowchart of a method for transmitting a cell reference signal according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for transmitting a cell reference signal according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of resource elements using only 1 cell reference signal;
FIG. 4 is a schematic diagram of resource elements using only 2 cell reference signals;
FIG. 5 is a schematic diagram of resource elements using only 4 cell reference signals;
FIG. 6 is a schematic diagram of resource block scheduling when an interference avoidance function is not activated in a conventional co-channel interference solving method;
FIG. 7 is a schematic diagram of resource block scheduling when an interference avoidance function is activated in a conventional co-channel interference solving method;
fig. 8 is a schematic structural diagram of a cell reference signal transmitting apparatus according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a computer device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., A and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Fig. 1 is a flowchart of a method for sending a cell reference signal according to an embodiment of the present invention, as shown in fig. 1, the method includes:
and 102, measuring the number of occupied resource blocks in the next transmission time interval of the cell.
And 104, judging whether the number of the occupied resource blocks is more than 0.
And 106, if the number of the occupied resource blocks is judged to be larger than 0, resetting a preset periodic timer and sending the cell reference signal by adopting the occupied resource blocks and a plurality of central resource blocks.
In the technical scheme of the cell reference signal transmission method provided by this embodiment, the number of occupied resource blocks in the next transmission time interval of a cell is measured; judging whether the number of the occupied resource blocks is greater than 0; if the number of the occupied resource blocks is larger than 0, resetting a preset periodic timer and sending the cell reference signal by adopting the occupied resource blocks and a plurality of central resource blocks, so that the sending power of the cell reference signal can be reduced, and the interference caused by the cell reference signal is eliminated.
Fig. 2 is a flowchart of a method for transmitting a cell reference signal according to another embodiment of the present invention, as shown in fig. 2, the method includes:
And 204, calculating the utilization rate of the resource blocks in the current transmission time interval of the cell according to the number of the idle resource blocks and the number of the occupied resource blocks in the current transmission time interval of the cell.
In this embodiment, step 204 specifically includes:
step 2042, adding the number of idle resource blocks and the number of occupied resource blocks to obtain the total number of resource blocks in the current transmission time interval of the cell.
Step 2044, the number of occupied resource blocks is divided by the total number of resource blocks to obtain the utilization rate of the resource blocks in the current transmission time interval of the cell.
Specifically, the first threshold value may be set according to actual needs. For example, the first threshold value is 70%.
In this embodiment, the primary functions of the cell reference signal are synchronization, measurement, channel estimation and demodulation. The cell reference signal is sent regardless of the traffic type and regardless of the network load. The cell reference signal is continuously transmitted over the entire bandwidth and all subframes of the cell. If the transmission power of the cell reference signal is not controlled, not only the interference between the cells with the same frequency is generated, but also unnecessary network resources are wasted.
Wherein the cell reference signal is transmitted at the 0-3 antenna port.
Specifically, the specified power may be set according to actual needs.
In this embodiment, if it is determined that the resource block utilization is greater than the first threshold, it indicates that the cell is in a high load state, the traffic volume is large, and cell reference signal information is sent on each resource block to ensure reliability of information transmission, and at this time, the cell reference signal resource selection and power adaptive function is turned off, and the cell reference signal sending power is directly reduced to the designated power.
The length of the generated sequence of the cell reference signal is
While
Therefore, the length of the generated sequence of the cell reference signal is 220 symbols. Wherein the cell reference signal specifically uses which symbols in the sequence and the length of the used sequence is related to the system bandwidth. Table 1 shows sequence symbols corresponding to different system bandwidths, and as shown in table 1, the number of occupied resource elements under different bandwidths is 12, 30, 50, 100, 150, and 200, respectively. For a bandwidth of 20MHZ, the number of subcarriers is 1200, and the length of a sequence that can be mapped under the bandwidth of 20MHZ is 200. Each sequence symbol in a sequence occupies one resource element, and the distance between the positions where two sequences are mapped is 6 subcarriers, so that it is occupied just over one Orthogonal Frequency Division Multiplexing (OFDM) symbol.
TABLE 1 sequence symbols corresponding to different system bandwidths
| Bandwidth (MHZ) | 1.4 | 3 | 5 | 10 | 15 | 20 |
| Number of |
6 | 15 | 25 | 50 | 75 | 100 |
| Number of resource elements | 12 | 30 | 50 | 100 | 150 | 200 |
| Sequence symbol | 104-115 | 95-124 | 85-134 | 60-159 | 35-184 | 10-209 |
In the time domain, the sequence of the cell reference signal is defined as:
in the formula, nsIs the slot index in one subframe, l is the OFDM symbol index in one slot, and c (2m) and c (2m +1) are pseudo-random sequences. Pseudo-random sequence at the beginning of each OFDM symbol with cinit＝213.
Wherein the content of the first and second substances,
is the Physical Cell Identity (PCI) of the Cell,
l' is an OFDM symbol index in one subframe,
is the total number of OFDM symbols in a downlink time slot.
Sequences of cell reference signals in the frequency domain
At antenna port p, time slot nsIs mapped to complex modulation symbols
According to the following mapping rules:
wherein:
k＝6m+(v+vshift)mod6
wherein the content of the first and second substances,
for the configuration of the downlink bandwidth, the bandwidth is,
configured for maximum downlink bandwidth.
The resource elements (k, l) used for transmitting the reference signal in a certain time slot of any antenna port cannot be used for any transmission in the same time slot and time slot zero of another antenna port.
Fig. 3 is a schematic resource element diagram using only 1 cell reference signal, and as shown in fig. 3, when only 1 cell reference signal (corresponding to antenna port 0) is used, cell reference symbols are inserted into the 1 st and 3 rd-to-last OFDM symbols of each slot, and adjacent 2 cell reference symbols within the same OFDM symbol are separated by 6 subcarriers in the frequency domain. Meanwhile, the cell reference symbol in the 3 rd to last OFDM symbol and the cell reference symbol in the first OFDM symbol are spaced by 3 subcarriers in the frequency domain. There are 8 resource elements in one resource block for transmitting the cell reference signal at this time.
Fig. 4 is a schematic diagram of resource elements using only 2 cell reference signals, and fig. 5 is a schematic diagram of resource elements using only 4 cell reference signals. As shown in fig. 4 to 5, when a cell uses 2 cell reference signals, the cell reference signal on the first antenna port and the cell reference signal on the 2 nd antenna port are multiplexed in the frequency domain, and are shifted by 3 subcarriers in the frequency domain. When a cell uses 4 cell reference signals, the cell reference signal on the 3 rd antenna port and the cell reference signal on the 4 th antenna port are multiplexed in the frequency domain, and are offset by 3 subcarriers in the frequency domain. And the cell reference signals on the 3 rd and 4 th antenna ports are transmitted on the 2 nd OFDM symbol of each slot, thus being multiplexed with the cell reference signals on the 1 st and 2 nd antenna ports in the time domain. To reduce the overhead of cell reference signals, the cell reference symbol density on the 3 rd and 4 th antenna ports is half that of the 1 st and 2 nd antenna ports.
In this embodiment, if it is determined that the resource block utilization is less than or equal to the first threshold, the cell reference signal resource selection and power adaptive function is turned on, and the number of occupied resource blocks in the next transmission time interval of the cell is measured.
In this embodiment, it is determined whether the number of occupied resource blocks is greater than 0, so as to determine whether occupied resource blocks exist in the next transmission time interval.
In this embodiment, if it is determined that an occupied resource block exists in the next transmission time interval, which indicates that the cell is in a service state, the occupied resource block and the plurality of central resource blocks are used to transmit the cell reference signal, and other resource blocks do not transmit the cell reference signal.
Optionally, the plurality of central resource blocks comprises 6 central resource blocks.
In this embodiment, if it is determined that there is no occupied Resource block in the next transmission time interval, the cell reference signal is always transmitted by using 6 central Resource blocks, and the cell reference signals are not transmitted by other Resource blocks, so as to ensure Radio Resource Management (RRM) measurement.
In this embodiment, if it is determined that the periodic timer is overtime, indicating that the cell is always in a non-service state, the periodic timer is reset and a cell reference signal is sent once using a full bandwidth.
As can be seen from the above, the cell reference signal is transmitted at the 0-3 antenna port, i.e., the transmission position of the cell reference signal is fixed. When the network is organized with the same frequency, the overlapping of the reference signals of the two cells with the same mode can cause the interference of the same frequency. The co-channel interference is one of the main interferences of the cell downlink rate reduction. Especially in dense urban areas, when the network is under the condition of medium and low load, the data symbols of the adjacent areas have no load with high probability, the cell reference signal becomes the main source of interference, and the maximum rate can reach more than 50%, thereby further influencing the important factors of user rate and cell throughput.
The traditional method for solving the same frequency interference is through the technologies of interference randomization, interference suppression and elimination and the like. Fig. 6 is a schematic diagram of resource block scheduling when the interference avoidance function is not turned on in the conventional co-channel interference solving method, and fig. 7 is a schematic diagram of resource block scheduling when the interference avoidance function is turned on in the conventional co-channel interference solving method. For the resource blocks in the service process, when the interference avoidance function is not activated, each cell starts to schedule from the low-frequency-band resource block, as shown in fig. 6, each cell uses the low-frequency-band resource block under the condition of light load, and the same frequency interference generated by the same resource block among the cells reduces the signal quality. After the interference avoidance function is turned on, the cell re-determines the initial resource block number of the resource scheduling according to a functional algorithm to reduce the RB collision probability in the resource scheduling process, as shown in fig. 7. But conventional approaches to solving co-channel interference typically include prevention, avoidance, suppression, and the like. Conventional downlink Interference solution techniques include Inter Cell Interference Coordination (ICIC) and Coordinated Multiple point transmission (CoMP), which focus on Coordinated scheduling of edge user data, perform Interference around data symbols, and have no capability of interfering with Cell reference signals.
In the embodiment, for the transmission of the cell reference signal in the time domain and the frequency domain, the inter-cell interference is reduced through the cell reference signal resource selection and the power self-adaption function. Aiming at the problem that the full-bandwidth continuous transmission of the cell reference signal can generate interference on the adjacent cell, the cell reference signal is utilized to measure a downlink channel, the number of resource blocks for transmitting the cell reference signal is estimated, unnecessary cell reference signals are effectively screened and eliminated, the interference on the adjacent cell is reduced, the quality and high-order modulation of the downlink channel are improved, the frequency spectrum efficiency and the downlink throughput are further improved, and therefore the user perception is improved.
In addition, according to the technical scheme provided by the embodiment, an operator can deploy the base station very conveniently without hardware change or influence on charging, and the base station can support the base station only by upgrading version base station software. For TD-LTE users, the cell reference signal resource selection and power adaptive technology are widely applied in scenarios, such as a medium-low load scenario, a neighboring cell load imbalance scenario, and a dense networking scenario. For the use of cell reference signal resource selective transmission and power self-adaptive technology, a channel is measured through a cell reference signal, the estimated power of the channel can be used before a service occurs, the number of resource blocks carrying the cell reference signal is transmitted, the transmission of unnecessary cell reference signals is effectively discriminated and eliminated, the power of the transmitted cell reference signal is controlled according to the condition of the service to be generated, the interference generated by the cell reference signal between adjacent cells in the same frequency is reduced, the number of the cell reference signals transmitted on a resource block can be controlled, and the power control resource is effectively saved.
In the technical scheme of the cell reference signal transmission method provided by this embodiment, the number of occupied resource blocks in the next transmission time interval of a cell is measured; judging whether the number of the occupied resource blocks is greater than 0; if the number of the occupied resource blocks is larger than 0, resetting a preset periodic timer and sending the cell reference signal by adopting the occupied resource blocks and a plurality of central resource blocks, so that the sending power of the cell reference signal can be reduced, and the interference caused by the cell reference signal is eliminated.
Fig. 8 is a schematic structural diagram of a cell reference signal transmitting apparatus according to an embodiment of the present invention, and as shown in fig. 8, the apparatus includes: the device comprises an acquisition module 301, a calculation module 302, a first judgment module 303, a sending module 304, a measurement module 305, a second judgment module 306, a reset module 307, a third judgment module 308 and a fourth judgment module 309.
An obtaining module 301, configured to obtain the number of idle resource blocks and the number of occupied resource blocks in a current transmission time interval of a cell.
A calculating module 302, configured to calculate a resource block utilization rate in the current transmission time interval of the cell according to the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
In this embodiment, the calculating module 302 specifically includes: a first computation submodule 3021 and a second computation submodule 3022.
The first calculating sub-module 3021 is configured to add the number of idle resource blocks and the number of occupied resource blocks to obtain the total number of resource blocks in the current transmission time interval of the cell.
The second calculating submodule 3022 is configured to divide the number of occupied resource blocks by the total number of resource blocks, so as to obtain a resource block utilization rate in the current transmission time interval of the cell.
The first determining module 303 is configured to determine whether the resource block utilization is greater than a first threshold.
A sending module 304, configured to reduce a sending power of the cell reference signal to an assigned power and send the cell reference signal according to the assigned power if the first determining module 303 determines that the resource block utilization is smaller than or equal to the first threshold; and continuing to execute the operation of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
A measuring module 305, configured to measure the number of occupied resource blocks in the next transmission time interval of the cell if the first determining module 303 determines that the resource block utilization is greater than the first threshold.
A second determining module 306, configured to determine whether the number of occupied resource blocks is greater than 0.
The resetting module 307 is configured to reset the preset period timer if the second determining module 306 determines that the number of occupied resource blocks is greater than 0.
The sending module 304 is further configured to send the cell reference signal by using the occupied resource block and a plurality of central resource blocks; and continuing to execute the operation of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
In this embodiment, the plurality of central resource blocks includes 6 central resource blocks.
The third determining module 308 is configured to determine whether the period timer is in an on state if the second determining module 306 determines that the number of occupied resource blocks is equal to 0.
The sending module 304 is further configured to send a cell reference signal by using a plurality of central resource blocks if the third determining module 308 determines that the period timer is not in an on state; and continuing to execute the operation of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
A fourth determining module 309, configured to determine whether the periodic timer is overtime if the third determining module 308 determines that the periodic timer is in an open state.
The resetting module 307 is further configured to reset the period timer if the fourth determining module 309 determines that the period timer is overtime.
The transmitting module 304 is further configured to transmit the primary cell reference signal using the full bandwidth; and continuing to execute the operation of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
The sending module 304 is further configured to send a cell reference signal by using a plurality of central resource blocks if the fourth determining module 309 determines that the period timer is not overtime; and continuing to execute the operation of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
The cell reference signal transmitting apparatus provided in this embodiment may be used to implement the cell reference signal transmitting methods in fig. 1 to fig. 2, and for specific description, reference may be made to the above-mentioned embodiment of the cell reference signal transmitting method, and a description thereof is not repeated here.
In the technical scheme of the device for sending the cell reference signal, the number of occupied resource blocks in the next transmission time interval of a cell is measured; judging whether the number of the occupied resource blocks is greater than 0; if the number of the occupied resource blocks is larger than 0, resetting a preset periodic timer and sending the cell reference signal by adopting the occupied resource blocks and a plurality of central resource blocks, so that the sending power of the cell reference signal can be reduced, and the interference caused by the cell reference signal is eliminated.
Fig. 9 is a schematic diagram of a computer device according to an embodiment of the present invention. As shown in fig. 9, the computer device 20 of this embodiment includes: the processor 21, the memory 22, and the computer program 23 stored in the memory 22 and capable of being executed on the processor 21, where the computer program 23 is implemented by the processor 21 to implement the method for sending the cell reference signal in the embodiments, and in order to avoid repetition, the details are not repeated herein. Alternatively, the computer program is executed by the processor 21 to implement the functions of each model/unit applied in the cell reference signal transmitting apparatus in the embodiments, which are not described herein for avoiding repetition.
The computer device 20 includes, but is not limited to, a processor 21, a memory 22. Those skilled in the art will appreciate that fig. 9 is merely an example of a computer device 20 and is not intended to limit the computer device 20 and that it may include more or fewer components than shown, or some of the components may be combined, or different components, e.g., the computer device may also include input output devices, network access devices, buses, etc.
The Processor 21 may be a Central Processing Unit (CPU), other general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 22 may be an internal storage unit of the computer device 20, such as a hard disk or a memory of the computer device 20. The memory 22 may also be an external storage device of the computer device 20, such as a plug-in hard disk provided on the computer device 20, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 22 may also include both internal storage units of the computer device 20 and external storage devices. The memory 22 is used for storing computer programs and other programs and data required by the computer device. The memory 22 may also be used to temporarily store data that has been output or is to be output.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for transmitting a cell reference signal, the method comprising:
measuring the number of occupied resource blocks in the next transmission time interval of the cell;
judging whether the number of the occupied resource blocks is greater than 0;
if the number of the occupied resource blocks is larger than 0, resetting a preset periodic timer and sending the cell reference signal by adopting the occupied resource blocks and a plurality of central resource blocks.
2. The method for transmitting cell reference signal according to claim 1, wherein before the measuring the number of occupied resource blocks in the next transmission time interval of the cell, the method further comprises:
acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell;
calculating the utilization rate of the resource blocks in the current transmission time interval of the cell according to the number of the idle resource blocks and the number of the occupied resource blocks in the current transmission time interval of the cell;
judging whether the resource block utilization rate is greater than a first threshold value;
and if the resource block utilization rate is judged to be larger than the first threshold value, continuing to execute the step of measuring the number of occupied resource blocks in the next transmission time interval of the cell.
3. The method for sending the cell reference signal according to claim 2, wherein after the determining whether the resource block utilization is greater than a first threshold, the method further comprises:
if the resource block utilization rate is judged to be less than or equal to the first threshold value, reducing the sending power of the cell reference signal to the designated power, and sending the cell reference signal according to the designated power; and continuing to execute the step of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
4. The method of claim 1, wherein after determining whether the number of occupied resource blocks is greater than 0, the method further comprises:
if the occupied resource block number is judged to be less than or equal to 0, judging whether the periodic timer is in an open state;
if the periodic timer is judged to be in the open state, judging whether the periodic timer is overtime;
if the periodic timer is judged to be overtime, resetting the periodic timer and sending the cell reference signal once by using the full bandwidth, and continuing to execute the step of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell;
if the periodic timer is judged not to be overtime, a plurality of central resource blocks are adopted to send the cell reference signals, and the step of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell is continuously executed;
if the periodic timer is judged not to be in an open state, a plurality of central resource blocks are adopted to send the cell reference signals; and continuing to execute the step of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
5. The method according to claim 2, wherein after the determining that the number of occupied resource blocks is greater than 0, resetting a preset periodic timer and sending the cell reference signal by using the occupied resource blocks and a plurality of central resource blocks, the method further comprises:
and continuing to execute the step of acquiring the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell.
6. The method according to claim 1, wherein the calculating a resource block utilization rate in the current transmission time interval of the cell according to the number of idle resource blocks and the number of occupied resource blocks in the current transmission time interval of the cell specifically includes:
adding the number of the idle resource blocks and the number of the occupied resource blocks to obtain the total number of the resource blocks in the current transmission time interval of the cell;
and dividing the occupied resource block number by the total number of the resource blocks to obtain the utilization rate of the resource blocks in the current transmission time interval of the cell.
7. The method according to claim 1, wherein the plurality of center resource blocks includes 6 center resource blocks.
8. An apparatus for transmitting cell reference signals, the apparatus comprising:
the measuring module is used for measuring the number of occupied resource blocks in the next transmission time interval of the cell;
the second judgment module is used for judging whether the number of the occupied resource blocks is greater than 0;
the reset module is used for resetting the preset periodic timer if the second judging module judges that the number of the occupied resource blocks is more than 0;
and the sending module is used for sending the cell reference signal by adopting the occupied resource block and a plurality of central resource blocks.
9. A storage medium, comprising a stored program, wherein the program, when executed, controls an apparatus in which the storage medium is located to perform the cell reference signal transmission method according to any one of claims 1 to 7.
10. A computer device comprising a memory for storing information comprising program instructions and a processor for controlling the execution of the program instructions, characterized in that the program instructions are loaded and executed by the processor to implement the steps of the cell reference signal transmission method according to any of claims 1-7.
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