CN103079217B - Sounding reference signal resource is determined method, Apparatus and system - Google Patents

Abstract

The application discloses a kind of sounding reference signal resource and has determined method, Apparatus and system. Wherein, described method comprises the steps: to measure the translational speed of subscriber equipment; Determine the detection reference signal SRS resource of distributing to subscriber equipment according to the translational speed of subscriber equipment, wherein, sounding reference signal resource comprises detection reference signal bandwidth and detection reference signal cycle. Such scheme is determined the resource of distributing to detection reference signal according to the translational speed of subscriber equipment, can effectively save SRS resource, improves the quantity of accessible user in community.

Description

Method, device and system for determining sounding reference signal resources

technical field

The present application relates to the communication field, in particular to a method, device and system for determining sounding reference signal resources.

Background technique

In the Long Term Evolution (LTE) system, the user equipment must perform uplink synchronization when sending data to the base station, and the uplink signals sent by the user equipment at different locations using the same time slot arrive at the receiving antenna of the base station at the same time, so that the base station can demodulate the data of each user. data sent by the device. A Sounding Reference Signal (Sounding Reference Signal, SRS) is a signal used to measure wireless channel information between a user equipment and a base station. According to the instructions of the base station, the user equipment periodically sends the SRS signal on the last data symbol (time) of the subframe according to the allocated bandwidth (frequency). The base station must adjust the time offset according to the received SRS signal within a certain period of time. If the time offset cannot be adjusted within a certain period of time, the user terminal will enter the uplink out-of-synchronization state, resulting in the failure of the base station to perform demodulation. However, to perform time offset adjustment, sufficient SRS signal samples must be obtained before the user equipment loses uplink synchronization. The sample size of the SRS signal is related to the bandwidth allocated to the user equipment and the number of measurements. The larger the bandwidth allocated to the user equipment, the larger the sample size of the SRS signal carried, and the more times of measurement, the more samples of the collected SRS signal. . Since measurements can be performed in each cycle, the shorter the cycle, the more measurements can be made, and the larger the number of SRS signal samples collected.

Therefore, it is very important to determine the resources allocated to the sounding reference signal. When the bandwidth allocated to the user equipment is determined, if the period of the sounding reference signal is too long, the time deviation will not be adjusted for a long time, and the time deviation will be too large, resulting in The user terminal enters an uplink out-of-synchronization state, which causes the base station to fail to perform demodulation. If the sounding reference signal period is too short, the sounding reference signal will be sent too frequently, resulting in waste of SRS resources. Moreover, SRS resources are certain, and each user equipment must occupy a certain amount of SRS resources, and the waste of SRS resources will reduce the number of user equipments that can communicate at the same time in the cell.

The prior art provides a method for determining the period of a sounding reference signal. At the beginning, when there are relatively few user equipments entering the network, relatively ample SRS resources are allocated to each user equipment. The period of sending the SRS signal of the user equipment and reducing the bandwidth allocated to the new user equipment entering the network.

However, there are obvious defects in the existing technology. For user equipments that enter the network earlier, more abundant SRS resources can be allocated, that is, the user equipment can be allocated a shorter period of sending SRS signals and more bandwidth. User equipments that enter the network late can only reduce allocated SRS resources, that is, can only lengthen the period for sending SRS signals and reduce bandwidth. Since the user equipment that has entered the network earlier adopts a relatively generous SRS resource allocation method, the SRS resource is obviously wasted. For user equipment that enters the network later, although it is possible to access the network by lengthening the period of sending SRS signals and reducing the bandwidth to reduce the occupation of SRS resources, the SRS resources are fixed, and the bandwidth cannot be infinitely reduced and sent The period of the SRS signal cannot be extended infinitely. When the bandwidth is reduced or the period of the SRS signal is extended beyond a critical point, it will cause uplink out-of-synchronization of the user equipment. Therefore, when the base station finds that it is no longer possible to allocate SRS resources to the user equipment by continuing to lengthen the period of sending SRS signals and reduce the bandwidth, the base station will reject the access of the user equipment, thereby limiting the number of accessible users in the cell.

Contents of the invention

The technical problem mainly solved by this application is to provide a method, device and system for determining SRS resources, which can save SRS resources and increase the number of accessible users in a cell.

In order to solve the above technical problems, the first aspect of the present application provides a method for determining sounding reference signal resources, including the following steps: measuring the moving speed of the user equipment; determining the sounding reference signal allocated to the user equipment according to the moving speed of the user equipment A signal SRS resource, wherein the SRS resource includes a SRS bandwidth and a SRS period.

With reference to the first aspect, in a first possible implementation manner of the first aspect of the present application, the step of determining resources allocated to sounding reference signals according to the moving speed of the user equipment includes: according to the moving speed of the user equipment Obtain the sounding reference signal measurement duration of the user equipment, wherein the sounding reference signal measurement duration is the longest time for ensuring the uplink synchronization of the user equipment; obtain the sounding reference signal bandwidth allocated to the user equipment, according to the Calculate the sounding reference signal bandwidth to obtain the number of times to measure the sounding reference signal; make the sounding reference signal cycle greater than the first threshold and less than the ratio of the sounding reference signal measurement duration to the number of times the sounding reference signal is measured, equal to the sounding reference signal The ratio of the signal measurement duration to the number of times the sounding reference signal is measured, or greater than the ratio of the sounding reference signal measurement duration to the number of times the sounding reference signal is measured and smaller than a second threshold, so that the user equipment performs the specified The sounding reference signal is sent periodically by the sounding reference signal.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect of this application, the obtaining of the sounding reference signal measurement duration of the user equipment according to the moving speed of the user equipment is The steps include: determining a speed level according to the moving speed of the user equipment, and determining a sounding reference signal measurement duration of the user equipment according to the speed level.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect of the present application, the speed level includes a low speed level and a high speed level.

With reference to the third possible implementation manner of the first aspect, in the fourth possible implementation manner of the first aspect of the present application, the low-speed level is that the moving speed of the user equipment is less than 30 kilometers per hour; the high-speed The level is that the moving speed of the user equipment is greater than or equal to 30 kilometers per hour.

With reference to the first aspect, in a fifth possible implementation manner of the first aspect of the present application, the method further includes: when the moving speed of the user equipment changes, re-determining resources allocated to the sounding reference signal.

In order to solve the above technical problem, the second aspect of the present application further provides an apparatus for determining sounding reference signal resources, including: a measurement module and an allocation module, the measurement module is used to measure the moving speed of the user equipment, and the measurement module uses the The moving speed of the user equipment is sent to the allocation module; the allocation module is configured to receive the moving speed of the user equipment, and determine the sounding reference signal resources allocated to the user equipment according to the moving speed of the user equipment, wherein, The SRS resources include the SRS bandwidth and the SRS period.

With reference to the second aspect, in a first possible implementation manner of the second aspect of the present application, the allocation module includes: a measurement duration unit, a measurement times unit, and a determination unit, and the measurement duration unit is used to The moving speed obtains the SRS measurement duration of the user equipment, wherein the SRS measurement duration is the longest time for ensuring the uplink synchronization of the UE, and the measurement duration unit converts the SRS measurement duration to The determination unit sends; the measurement times unit is used to obtain the sounding reference signal bandwidth allocated to the user equipment, calculate the number of times required to measure the sounding reference signal according to the sounding reference signal bandwidth, and the measurement times unit will The number of times of measuring the sounding reference signal is sent to the determining unit; the determining unit is configured to receive the measurement duration of the sounding reference signal and the number of times of measuring the sounding reference signal, so that the period of the sounding reference signal is greater than the first threshold and less than The ratio of the sounding reference signal measurement duration to the number of times the sounding reference signal is measured is equal to the ratio of the sounding reference signal measurement duration to the number of times the sounding reference signal is measured, or greater than the ratio of the sounding reference signal measurement duration to the number of times the sounding reference signal is measured The ratio of the times of measuring the sounding reference signal is smaller than a second threshold, so that the user equipment sends the sounding reference signal according to the sounding reference signal period.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect of the present application, the measurement duration unit is further configured to receive the moving speed of the user equipment, and according to the user equipment The moving speed of the user equipment determines a speed level, and determines the SRS measurement duration of the user equipment according to the speed level.

With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect of the present application, the speed level includes a low speed level and a high speed level.

With reference to the third possible implementation manner of the second aspect, in the fourth possible implementation manner of the second aspect of the present application, the low-speed level is that the moving speed of the user equipment is less than 30 kilometers per hour; the high-speed The level is that the moving speed of the user equipment is greater than or equal to 30 kilometers per hour.

With reference to the second aspect, in a fifth possible implementation manner of the second aspect of the present application, the allocation module is further configured to re-determine resources allocated to the sounding reference signal when the moving speed of the user equipment changes.

In order to solve the above technical problems, the third aspect of the present application further provides a system for determining sounding reference signal resources, including a base station and user equipment, and communication between the base station and user equipment is possible, wherein the base station is configured with any of the above-mentioned device described in this item.

Since the moving speed of the user equipment is different, the resource of the sounding reference signal required by the user equipment is different. When the mobile speed of the user equipment is fast, the channel fades quickly, and the user equipment needs to adjust the time offset faster, so more SRS resources are needed; when the mobile speed of the user equipment is slow, the channel fades slowly, and the user equipment can Adjusts time offset slowly, so less SRS resources are required. Therefore, the above solution determines the resources allocated to the sounding reference signal according to the moving speed of the user equipment, which can effectively save SRS resources and increase the number of accessible users in the cell.

Description of drawings

FIG. 1 is a schematic structural diagram of an embodiment of a system for determining sounding reference signal resources in the present application;

FIG. 2 is a schematic diagram of symbols for transmitting SRS signals by the sounding reference signal resource determination system shown in FIG. 1;

Fig. 3 is a schematic diagram of the bandwidth of the transmission SRS signal of the sounding reference signal resource determination system shown in Fig. 1;

FIG. 4 is a flowchart of an embodiment of a method for determining sounding reference signal resources in the present application;

FIG. 5 is a flow chart of another embodiment of the method for determining sounding reference signal resources in the present application;

FIG. 6 is a schematic structural diagram of an embodiment of an apparatus for determining sounding reference signal resources in the present application;

FIG. 7 is a schematic structural diagram of another embodiment of an apparatus for determining sounding reference signal resources of the present application;

Fig. 8 is a schematic structural diagram of still another implementation manner of an apparatus for determining sounding reference signal resources of the present application.

detailed description

In the following description, for purposes of illustration rather than limitation, specific details, such as specific system architectures, interfaces, and techniques, are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

Referring to FIGS. 1 to 3, FIG. 1 is a schematic structural diagram of an embodiment of a sounding reference signal resource determination system of the present application. FIG. 2 is a schematic diagram of symbols for transmitting SRS signals by the sounding reference signal resource determination system shown in FIG. 1 is a schematic diagram of the sounding reference signal resource determining the bandwidth of the system for transmitting the SRS signal. The system for determining SRS resources in this embodiment includes: a base station 110 and a user equipment 120, and communication between the base station 110 and the user equipment 120 is possible.

In the LTE system, the subframe length is 1 millisecond. When a common cyclic prefix (CyclicPrefix, CP) is used, each subframe includes a total of 14 symbols from symbols #0 to #13. In the last symbol of the uplink subframe, that is, symbol #13, the user equipment 120 sends a sounding reference signal to the base station 110 . For example, the SRS period may be 5 milliseconds, 10 milliseconds or 20 milliseconds, 40 milliseconds, 80 milliseconds, 160 milliseconds, and so on. The base station 110 also presets the bandwidth of the SRS signal allocated to the user equipment 120, for example, the bandwidth allocated to the user equipment 120 can be set to 4 resource blocks (ResourceBlock, RB), 20 resource blocks, 40 resource blocks or 80 resource blocks and so on.

When the user equipment 120 sends the SRS signal to the base station 110, each resource block carries a unit number of SRS signal samples. Therefore, within a certain period of time, the shorter the period of the sounding reference signal, the wider the bandwidth allocated to the SRS signal, and the larger the number of samples of the SRS signal received by the base station 110 .

Referring to FIG. 4 , FIG. 4 is a flowchart of an embodiment of a method for determining sounding reference signal resources in the present application. The method for determining reference signal resources in this embodiment includes:

S401: The base station measures the moving speed of the user equipment.

The moving speed of the user equipment is different. For example, when a person makes a phone call while walking, the moving speed of the user equipment is relatively slow, but when a person makes a phone call in a vehicle traveling at high speed, the moving speed of the user equipment is relatively fast. When the moving speed of the user equipment is fast, the channel fades quickly, and the user equipment needs to adjust the time offset faster; when the moving speed of the user equipment is slow, the channel fades slowly, and the user equipment can adjust the time offset slowly. Therefore, a user equipment with a faster moving speed needs more SRS resources than a user equipment with a slower moving speed to ensure that sufficient SRS signal samples are obtained before uplink out-of-sync occurs. Therefore, before determining the SRS resources allocated to the user equipment, the base station measures the moving speed of the user equipment.

S402: The base station determines sounding reference signal resources allocated to the user equipment according to the moving speed of the user equipment, where the sounding reference signal resources include a sounding reference signal bandwidth and a sounding reference signal period.

The base station determines the SRS resource allocated to the user equipment according to the moving speed of the user equipment. For the user equipment with a faster moving speed, the base station tries to allocate a shorter SRS period and a wider SRS bandwidth to the user equipment. ; For a user equipment with a slow moving speed, the base station tries to allocate a longer SRS period and a narrower SRS bandwidth to the user equipment.

Referring to FIG. 5 , FIG. 5 is a flowchart of another implementation manner of a method for determining sounding reference signal resources in the present application. The method for determining sounding reference signal resources in this embodiment includes the following steps:

S501: The base station measures the moving speed of the user equipment.

The moving speed of the user equipment is different. For example, when a person makes a phone call while walking, the moving speed of the user equipment is relatively slow, but when a person makes a phone call in a vehicle traveling at high speed, the moving speed of the user equipment is relatively fast. When the moving speed of the user equipment is fast, the channel fades quickly, and the user equipment needs to adjust the time offset faster; when the moving speed of the user equipment is slow, the channel fades slowly, and the user equipment can adjust the time offset slowly. Therefore, before determining the SRS resources allocated to the user equipment, the base station measures the moving speed of the user equipment.

S502: The base station obtains the SRS measurement duration of the user equipment according to the moving speed of the user equipment.

After obtaining the moving speed of the user equipment, the base station obtains the SRS measurement duration of the user equipment according to the moving speed of the user equipment. Wherein, the sounding reference signal measurement duration is the longest time for ensuring the uplink synchronization of the user equipment, if the base station has not obtained enough SRS signal samples after exceeding the sounding reference signal measurement duration, thereby adjusting the time offset, an uplink error will occur. out of step.

In order to save SRS resources to the greatest extent, the SRS measurement duration may be determined completely according to the moving speed of the user equipment. However, in order to facilitate management and save the calculation process, the mobile speed of the user equipment can also be divided into at least two speed grades, each speed grade corresponds to a sounding reference signal measurement duration, and this sounding reference signal measurement duration ensures that even if the user equipment moves at a speed When moving at the fastest movement speed in the level, there will be no upward synchronization. The base station determines the speed class according to the moving speed of the user equipment, and determines the SRS measurement duration of the user equipment according to the speed class. For example, the base station divides the speed grades of the user equipment into low speed grades and high speed grades. If the moving speed of the user equipment is less than 30 kilometers per hour, determine it as a low-speed class, and determine the first sounding reference signal measurement duration; if the moving speed of the user equipment is greater than or equal to 30 kilometers per hour, determine it as a high-speed class, and determine The second SRS measurement duration, the first SRS measurement duration is longer than the second SRS measurement duration. It can be understood that the speed grades can also be divided into three or more speed grades, so as to improve the accuracy.

S503: The base station obtains the bandwidth of the sounding reference signal allocated to the user equipment, and calculates the number of times required to measure the sounding reference signal according to the bandwidth of the sounding reference signal.

As mentioned above, the base station presets the SRS bandwidth allocated to the user equipment as 4 resource blocks (ResourceBlock, RB), 20 resource blocks, 40 resource blocks, or 80 resource blocks and so on. If the moving speed of the user equipment is faster, a wider sounding reference signal bandwidth is preferentially allocated to the user equipment. For example, if the moving speed of the user equipment is fast, 80 resource blocks are allocated to the user equipment; if all 80 resource blocks have been allocated, 40 resource blocks are allocated to the user equipment, and so on. The base station acquires the bandwidth of the sounding reference signal allocated to the user equipment, and calculates the number of times required to measure the sounding reference signal according to the bandwidth of the sounding reference signal. Wherein, the number of times to measure the sounding reference signal can be obtained through simulation experiments. For example, when the bandwidth allocated to the user equipment is 80RB, the number of times to measure the sounding reference signal is 2; when the bandwidth allocated to the user equipment is 4RB, the measurement The number of times to sound the reference signal is 32 times.

S504: The base station determines a detection signal period.

The sounding reference signal can only be measured once in each sounding signal period, so the sounding signal period is determined after knowing the measurement duration of the sounding reference signal and the number of times of measuring the sounding reference signal. Let the SRS measurement duration be S, and the number of SRS measurements be N, so that the SRS period T satisfies the ratio of the SRS measurement duration S to the SRS measurement times N, which is equal to the SRS The ratio N of the signal measurement duration S to the number of times of measuring the sounding reference signal, or greater than the ratio of the measurement duration S of the sounding reference signal to the number of times N of measuring the sounding reference signal and smaller than the second threshold, that is, or Wherein, a is the first threshold, and when the detection signal period is less than a, the effect of saving SRS resources cannot be satisfied. b is the second threshold, and when the period of the detection signal is greater than b, the upper step loss will occur. Based on this, the base station determines the period of the sounding signal, and enables the user equipment to send the SRS signal according to the determined period of the sounding signal.

During the communication process, if the moving speed of the user equipment changes, the resources allocated to the sounding reference signal are re-determined to prevent wasting SRS resources or causing uplink failure.

Referring to FIG. 6 , FIG. 6 is a schematic structural diagram of an embodiment of an apparatus for determining sounding reference signal resources in the present application. The apparatus for determining SRS resources in this embodiment includes: a measurement module 610 and an allocation module 620 .

The measuring module 610 is used for measuring the moving speed of the user equipment. For example, when the moving speed of the user equipment is fast, the channel fades quickly, and the user equipment needs to adjust the time offset faster; when the moving speed of the user equipment is slow, the channel fades slowly, and the user equipment can adjust the time offset slowly. Therefore, a user equipment with a faster moving speed needs more SRS resources than a user equipment with a slower moving speed to ensure that sufficient SRS signal samples are obtained before uplink out-of-sync occurs. Therefore, before determining the SRS resources allocated to the user equipment, the measurement module 610 must measure the moving speed of the user equipment. The measuring module 610 sends the moving speed of the user equipment to the allocating module 620 .

The allocation module 620 is configured to receive the moving speed of the user equipment, and determine the SRS resource allocated to the user equipment according to the moving speed of the user equipment, wherein the SRS resource includes the SRS bandwidth and the SRS period. For example, the allocation module 620 determines the SRS resource allocated to the user equipment according to the moving speed of the user equipment. For the user equipment with a faster moving speed, the allocation module 620 tries to allocate a shorter SRS period and a wider SRS resource. The reference signal bandwidth is allocated to the user equipment; for the slow moving user equipment, the allocation module 620 tries to allocate a longer SRS period and a narrower SRS bandwidth to the user equipment.

Referring to FIG. 7 , FIG. 7 is a schematic structural diagram of another embodiment of an apparatus for determining sounding reference signal resources in the present application. The apparatus for determining SRS resources in this embodiment includes: a measurement module 710 and an allocation module 720 . The allocation module 720 includes a measurement duration unit 721 , a measurement times unit 723 and a determination unit 725 .

The measuring module 710 is used for measuring the moving speed of the user equipment. For example, when the moving speed of the user equipment is fast, the channel fades quickly, and the user equipment needs to adjust the time offset faster; when the moving speed of the user equipment is slow, the channel fades slowly, and the user equipment can adjust the time offset slowly. Therefore, a user equipment with a faster moving speed needs more SRS resources than a user equipment with a slower moving speed to ensure that sufficient SRS signal samples are obtained before uplink out-of-sync occurs. Therefore, before determining the SRS resources allocated to the user equipment, the measurement module 710 must measure the moving speed of the user equipment.

The measurement duration unit 721 is configured to obtain the SRS measurement duration of the UE according to the moving speed of the UE, wherein the SRS measurement duration is the longest time for ensuring the uplink synchronization of the UE. For example, after obtaining the moving speed of the user equipment, the measurement duration unit 721 obtains the SRS measurement duration of the user equipment according to the moving speed of the user equipment. Wherein, the sounding reference signal measurement duration is the longest time for ensuring the uplink synchronization of the user equipment, if the base station has not obtained enough SRS signal samples after exceeding the sounding reference signal measurement duration, thereby adjusting the time offset, an uplink error will occur. out of step. In order to save SRS resources to the greatest extent, the SRS measurement duration may be determined completely according to the moving speed of the user equipment. However, in order to facilitate management and save the calculation process, the mobile speed of the user equipment can also be divided into at least two speed grades, each speed grade corresponds to a sounding reference signal measurement duration, and this sounding reference signal measurement duration ensures that even if the user equipment moves at a speed When moving at the fastest movement speed in the level, there will be no upward synchronization. The measurement duration unit 721 determines a speed level according to the moving speed of the user equipment, and determines a sounding reference signal measurement duration of the user equipment according to the speed level. For example, the measurement duration unit 721 divides the speed class of the user equipment into a low speed class and a high speed class. If the moving speed of the user equipment is less than 30 kilometers per hour, determine it as a low-speed class, and determine the first sounding reference signal measurement duration; if the moving speed of the user equipment is greater than or equal to 30 kilometers per hour, determine it as a high-speed class, and determine The second SRS measurement duration, the first SRS measurement duration is longer than the second SRS measurement duration. It can be understood that the speed grades can also be divided into three or more speed grades, so as to improve the accuracy. The measurement duration unit 721 sends the SRS measurement duration to the determination unit 725 .

The measurement times unit 723 is configured to obtain the SRS bandwidth allocated to the user equipment, and calculate the required SRS measurement times according to the SRS bandwidth. For example, the base station presets the sounding reference signal bandwidth allocated to the user equipment as 4 resource blocks, 20 resource blocks, 40 resource blocks, or 80 resource blocks, and so on. If the moving speed of the user equipment is faster, a wider sounding reference signal bandwidth is preferentially allocated to the user equipment. For example, if the moving speed of the user equipment is fast, 80 resource blocks are allocated to the user equipment; if all 80 resource blocks have been allocated, 40 resource blocks are allocated to the user equipment, and so on. The measurement times unit 723 acquires the SRS bandwidth allocated to the user equipment, and calculates the required SRS measurement times according to the SRS bandwidth. Wherein, the number of times to measure the sounding reference signal can be obtained through simulation experiments. For example, when the bandwidth allocated to the user equipment is 80RB, the number of times to measure the sounding reference signal is 2; when the bandwidth allocated to the user equipment is 4RB, the measurement The number of times to sound the reference signal is 32 times. The measurement times unit 723 sends the times of measuring the SRS to the determination unit 725 .

The determination unit 725 is configured to receive the SRS measurement duration and the number of times the SRS is measured, so that the SRS period is greater than the first threshold and less than the ratio of the SRS measurement duration to the number of times the SRS is measured, equal to the SRS measurement The ratio of the duration to the number of times the SRS is measured, or greater than the ratio of the SRS measurement duration to the number of times the SRS is measured and smaller than the second threshold, so that the user equipment sends the SRS according to the SRS period. For example, the SRS can only be measured once in each SRS cycle, so the determination unit 725 determines the SRS cycle after knowing the SRS measurement duration and the number of SRS measurements. Let the SRS measurement duration be S, and the number of SRS measurements be N, so that the SRS period T satisfies the ratio of the SRS measurement duration S to the SRS measurement times N, which is equal to the SRS The ratio N of the signal measurement duration S to the number of times of measuring the sounding reference signal, or greater than the ratio of the measurement duration S of the sounding reference signal to the number of times N of measuring the sounding reference signal and smaller than the second threshold, that is, or Wherein, a is the first threshold, and when the detection signal period is less than a, the effect of saving SRS resources cannot be satisfied. b is the second threshold, and when the period of the detection signal is greater than b, the upper step loss will occur. Based on this, the base station determines the period of the sounding signal, and enables the user equipment to send the SRS signal according to the determined period of the sounding signal.

During the communication process, if the moving speed of the user equipment changes, the allocation module 720 re-determines the resources allocated to the sounding reference signal, so as to prevent wasting SRS resources or causing uplink failure.

Referring to FIG. 8 , FIG. 8 is a schematic structural diagram of another embodiment of an apparatus for determining sounding reference signal resources in the present application. The apparatus for determining SRS resources in this embodiment includes: a receiver 810 , a processor 820 and a transmitter 830 . Wherein, the processor 820 is coupled to the receiver 810 and the transmitter 830 respectively.

The receiver 810 and the transmitter 830 are used to communicate with user equipment.

The processor 820 is used to measure the moving speed of the user equipment, obtain the measurement duration of the sounding reference signal of the user equipment according to the moving speed of the user equipment, obtain the bandwidth of the sounding reference signal allocated to the user equipment, and calculate the required measurement sounding signal according to the bandwidth of the sounding reference signal The number of reference signals, determining the SRS period according to the SRS measurement duration and the number of times the SRS is measured, so that the SRS period is greater than the first threshold and less than the ratio of the SRS measurement duration to the number of times the SRS is measured, Equal to the ratio of the sounding reference signal measurement duration to the number of times the sounding reference signal is measured, or greater than the ratio of the sounding reference signal measurement duration to the number of times the sounding reference signal is measured and smaller than the second threshold, so that the user equipment sends a sounding signal according to the sounding reference signal period reference signal. For example, when the moving speed of the user equipment is fast, the channel fades quickly, and the user equipment needs to adjust the time offset faster; when the moving speed of the user equipment is slow, the channel fades slowly, and the user equipment can adjust the time offset slowly. Therefore, a user equipment with a faster moving speed needs more SRS resources than a user equipment with a slower moving speed to ensure that sufficient SRS signal samples are obtained before uplink out-of-sync occurs. Therefore, before determining the SRS resources allocated to the user equipment, the processor 820 must measure the moving speed of the user equipment. After obtaining the moving speed of the user equipment, the processor 820 obtains the SRS measurement duration of the user equipment according to the moving speed of the user equipment. Wherein, the sounding reference signal measurement duration is the longest time for ensuring the uplink synchronization of the user equipment, if the base station has not obtained enough SRS signal samples after exceeding the sounding reference signal measurement duration, thereby adjusting the time offset, an uplink error will occur. Out of step. In order to save SRS resources to the greatest extent, the SRS measurement duration may be determined completely according to the moving speed of the user equipment. However, in order to facilitate management and save the calculation process, the mobile speed of the user equipment can also be divided into at least two speed classes, each speed class corresponds to a sounding reference signal measurement duration, and ensure that even if the user equipment moves at the fastest rate within the speed class When moving at a moving speed, there will be no uplink loss of synchronization. The processor 820 determines a speed class according to the moving speed of the user equipment, and determines a sounding reference signal measurement duration of the user equipment according to the speed class. For example, the processor 820 divides the speed class of the user equipment into a low speed class and a high speed class. If the moving speed of the user equipment is less than 30 kilometers per hour, determine it as a low-speed class, and determine the first sounding reference signal measurement duration; if the moving speed of the user equipment is greater than or equal to 30 kilometers per hour, determine it as a high-speed class, and determine The second SRS measurement duration, the first SRS measurement duration is longer than the second SRS measurement duration. It can be understood that the speed grades can also be divided into three or more speed grades, so as to improve the accuracy. The base station presets the sounding reference signal bandwidth allocated to the user equipment as 4 resource blocks, 20 resource blocks, 40 resource blocks or 80 resource blocks and so on. If the moving speed of the user equipment is faster, a wider sounding reference signal bandwidth is preferentially allocated to the user equipment. For example, if the moving speed of the user equipment is fast, 80 resource blocks are allocated to the user equipment; if all 80 resource blocks have been allocated, 40 resource blocks are allocated to the user equipment, and so on. The processor 820 acquires the bandwidth of the sounding reference signal allocated to the user equipment, and calculates the number of times required to measure the sounding reference signal according to the bandwidth of the sounding reference signal. Among them, it can be obtained through simulation experiments that, for example, when the bandwidth allocated to the user equipment is 80RB, the number of times to measure the sounding reference signal is 2; when the bandwidth allocated to the user equipment is 4RB, the number of times to measure the sounding reference signal is 32 times. The SRS can only be measured once in each SRS cycle, so the processor 820 determines the SRS cycle after knowing the SRS measurement duration and the number of SRS measurements. Let the SRS measurement duration be S, and the number of SRS measurements be N, so that the SRS period T satisfies the ratio of the SRS measurement duration S to the SRS measurement times N, which is equal to the SRS The ratio N of the signal measurement duration S to the number of times of measuring the sounding reference signal, or greater than the ratio of the measurement duration S of the sounding reference signal to the number of times N of measuring the sounding reference signal and smaller than the second threshold, that is, or Wherein, a is the first threshold, and when the detection signal period is smaller than a, the effect of saving SRS resources cannot be satisfied. b is the second threshold, and when the period of the detection signal is greater than b, the upper step loss will occur. Based on this, the base station determines the period of the sounding signal, and enables the user equipment to send the SRS signal according to the determined period of the sounding signal.

During the communication process, if the moving speed of the user equipment changes, the processor 820 re-determines resources allocated to the sounding reference signal, so as to prevent wasting SRS resources or causing uplink failure.

Based on the above-mentioned base station, this application also proposes a system for determining sounding reference signal resources, including base station and user settings, and communication between the base station and user equipment can be performed. For details, please refer to FIG. 1 and related descriptions, which will not be repeated here. .

Since the moving speed of the user equipment is different, the resource of the sounding reference signal required by the user equipment is different. When the mobile speed of the user equipment is fast, the channel fades quickly, and the user equipment needs to adjust the time offset faster, so more SRS resources are needed; when the mobile speed of the user equipment is slow, the channel fades slowly, and the user equipment can Adjusts time offset slowly, so less SRS resources are required. Therefore, the above solution determines the resources allocated to the sounding reference signal according to the moving speed of the user equipment, which can effectively save SRS resources and increase the number of accessible users in the cell.

In the several implementation manners provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device implementations described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), magnetic disk or optical disk, and other media that can store program codes.

Claims (13)

1. sounding reference signal resource is determined a method, it is characterized in that, comprises the steps:

The translational speed of base station measurement subscriber equipment;

Described base station is determined and is distributed to described subscriber equipment according to the translational speed of described subscriber equipmentDetection reference signal SRS resource, wherein, sounding reference signal resource comprises detection reference signalBandwidth and detection reference signal cycle; For translational speed subscriber equipment faster, described base stationDistribute shorter detection reference signal cycle and wider detection reference signal bandwidth to subscriber equipment;For the slower subscriber equipment of translational speed, the detection reference signal cycle that described base station assigns is grownAnd narrower detection reference signal bandwidth is to subscriber equipment.

2. method according to claim 1, is characterized in that, describedly establishes according to described userStandby translational speed determines that the step of the resource of distributing to detection reference signal comprises:

Obtain the detection reference signal of described subscriber equipment according to the translational speed of described subscriber equipmentMeasure duration, wherein, it is up for ensureing described subscriber equipment that described detection reference signal is measured durationSynchronous maximum duration;

Obtain the detection reference signal bandwidth of distributing to described subscriber equipment, according to described detection referenceSignal bandwidth calculates the number of times of required measurement detection reference signal;

Make the detection reference signal cycle be greater than the first thresholding and be less than described detection reference signal to surveyThe ratio of the number of times of amount duration and described measurement detection reference signal, equal described detection reference signalMeasure the ratio of the number of times of duration and described measurement detection reference signal, or, be greater than described detection ginsengExamine signal measurement duration and described measurement detection reference signal number of times ratio and be less than secondLimit, so that described subscriber equipment sends described detection with reference to letter by the described detection reference signal cycleNumber.

3. method according to claim 2, is characterized in that, describedly establishes according to described userThe step that standby translational speed obtains the detection reference signal measurement duration of described subscriber equipment comprises:

Determine speed class according to the translational speed of described subscriber equipment, and according to described speed classDetermine the detection reference signal measurement duration of described subscriber equipment.

4. method according to claim 3, is characterized in that, described speed class comprises lowSpeed grade and high speed grade.

5. method according to claim 4, is characterized in that, described in described low speed grade isThe translational speed of subscriber equipment is less than 30 kilometer per hours; Described high speed grade is that described user establishesStandby translational speed is more than or equal to 30 kilometer per hours.

6. method according to claim 1, is characterized in that, described method also comprises:

In the time that the translational speed of subscriber equipment changes, redefine and distribute to detection reference signalResource.

7. a sounding reference signal resource determining device, is characterized in that, described detection is with reference to letterNumber resource determining device is base station, comprising: measurement module and distribution module,

Described measurement module is for measuring the translational speed of subscriber equipment, described in described measurement module is incited somebody to actionThe translational speed of subscriber equipment sends to described distribution module;

Described distribution module, for receiving the translational speed of described subscriber equipment, is established according to described userStandby translational speed is determined the sounding reference signal resource of distributing to described subscriber equipment, wherein, visitsSurvey reference signal resource and comprise detection reference signal bandwidth and detection reference signal cycle; For movingThe subscriber equipment of moving speed, the detection reference signal cycle that described module assigns is shorter andWider detection reference signal bandwidth is to subscriber equipment; For the slower subscriber equipment of translational speed,The detection reference signal cycle that described module assigns is grown and narrower detection reference signal bandThe wide subscriber equipment of giving.

8. device according to claim 7, is characterized in that, described distribution module comprises:Measure duration unit, measure time counting unit and determining unit,

Described measurement duration unit is for obtaining described use according to the translational speed of described subscriber equipmentThe detection reference signal of family equipment is measured duration, and wherein, described detection reference signal is measured duration and isEnsure the maximum duration of described subscriber equipment uplink synchronous, described measurement duration unit is by described detectionReference signal is measured duration and is sent to described determining unit;

Described measurement time counting unit is for obtaining the detection reference signal of distributing to described subscriber equipmentBandwidth, obtains the inferior of required measurement detection reference signal according to described detection reference signal bandwidth calculationNumber, described measurement time counting unit by the number of times of described measurement detection reference signal to described determining unitSend;

Described determining unit is used for receiving described detection reference signal and measures duration and described measurementThe number of times of detection reference signal, make the detection reference signal cycle be greater than the first thresholding and be less than described inDetection reference signal measure the number of times of duration and described measurement detection reference signal ratio, equal instituteState detection reference signal and measure the ratio of the number of times of duration and described measurement detection reference signal, or,Be greater than described detection reference signal and measure the ratio of duration and the number of times of described measurement detection reference signalValue and be less than the second thresholding, so that described subscriber equipment sends institute by the described detection reference signal cycleState detection reference signal.

9. device according to claim 8, is characterized in that, described measurement duration unit alsoFor receiving the translational speed of described subscriber equipment, determine according to the translational speed of described subscriber equipmentSpeed class, and according to described speed class determine described subscriber equipment detection reference signal measureDuration.

10. device according to claim 9, is characterized in that, described speed class comprises lowSpeed grade and high speed grade.

11. devices according to claim 10, is characterized in that, described low speed grade is instituteThe translational speed of stating subscriber equipment is less than 30 kilometer per hours; Described high speed grade is described userThe translational speed of equipment is more than or equal to 30 kilometer per hours.

12. devices according to claim 7, is characterized in that, described distribution module also forIn the time that the translational speed of subscriber equipment changes, redefine the money of distributing to detection reference signalSource.

13. 1 kinds of sounding reference signal resources are determined system, it is characterized in that, comprise base station and userEquipment, can communicate between described base station and subscriber equipment, and wherein, described base station is provided withDevice as described in claim as arbitrary in claim 7-12.