CN103002585A - Allocation method and device for community sounding reference signal (SRS) resources - Google Patents

Abstract

The invention discloses an allocation method and device for community SRS resources. Periodic SRS resources and non-periodic SRS resources are preserved respectively, so that a community SRS resource pool is divided into a periodic SRS resource pool and a non-periodic SRS resource pool. When user equipment (UE) needs to be allocated with resources, available resources are selected in a corresponding resource pool according to SRS triggering conditions of the UE. When the SRS resources needed by the UE are periodic SRS resources, the UE is allocated with the SRS resources from the predesigned periodic SRS resource pool; and when the SRS resources needed by the UE are non-periodic SRS resources, the UE is allocated with the SRS resources from the predesigned non-periodic SRS resource pool, accordingly, the resource conflict problem of periodic SRS and non-periodic SRS resource alternative allocation caused by access orders and the like of the UE is avoided, the fairness of SRS resource allocation to the UE is guaranteed, and the distribution success rate of the SRS resources is improved.

Description

Method and device for allocating cell SRS resources

Technical Field

The present invention relates to communications technologies, and in particular, to a method and an apparatus for allocating SRS resources in a cell.

Background

In an LTE (Long Term Evolution) system, uplink channel information is measured by an uplink pilot Reference Signal SRS (Sounding Reference Signal).

In an LTE R8/9 system, SRS transmission resources of a UE (User Equipment) are quasi-statically configured through RRC (Radio Resource Control) signaling, and SRS transmission is a single-port SRS, and the UE periodically transmits the SRS according to a high-level signaling. In an LTE-a (Long term evolution Advanced) R10 system, due to introduction of characteristics such as uplink MIMO (Multiple input Multiple Output) enhancement, a UE often needs to transmit an SRS at Multiple ports, and SRS resources need to be larger, so that a non-periodic SRS transmission mode is newly introduced into a protocol, and port number support {1, 2, 4} of SRS transmission is extended. The aperiodic SRS is triggered by the UE to send the SRS through a base station transmitting DCI (Downlink Control information) on a pdcch (physical Downlink Control channel), and the DCI format that can be used for triggering the aperiodic SRS has DCI format0/4/1a/2B/2C, so that the channel measurement delay is reduced, and the flexibility of SRS transmission is increased. Different SRS ports are distinguished by different cyclic shifts of the SRS sequence.

Specifically, in the LTE system, an uplink sounding reference signal, i.e. SRS, is defined for supporting uplink channel measurement. The SRS resource occupies the last SC-FDMA symbol of the regular uplink subframe or the last one or two SC-FDMA symbols of the UpPTS subframe. In the LTE system, the SRS is transmitted periodically through a single port, that is, the base station quasi-statically configures an SRS resource of each UE through a high layer signaling, and the UE continuously transmits an SRS signal at a certain period on a corresponding resource according to the SRS resource configuration until the SRS resource is released, where the SRS resource includes a CS (cyclic Shift), a bandwidth, a frequency hopping parameter, a period, a transmission subframe position, and the like. The CS enables a plurality of UEs to be multiplexed on the same time-frequency resource through cyclic shift, and a protocol TS36.211 defines that the maximum value of the CS is 8, namely 8 UEs are multiplexed at most; for different uplink system bandwidths, SRS bandwidth configurations are defined in a protocol TS36.211 and all support 8 configurations, each configuration simultaneously indicates a maximum SRS transmission bandwidth supported by a cell and an SRS transmission bandwidth class usable by a UE in the cell, each configuration supports 4 SRS transmission bandwidth classes, and an SRS transmission bandwidth of the UE is necessarily one of the 4 SRS transmission bandwidth classes; the period and the position of the sending subframe indicate the SRS time domain resource information of the cell; based on the information of the three resource dimensions, the available SRS time domain, frequency domain and code domain resources of the cell are jointly determined.

Once the periodic SRS resource is configured, the UE will periodically transmit the SRS according to the configuration, and even if the resource is not used for transmitting signals, the resource is always occupied, so the periodic SRS usually occupies more resources, and the resource utilization rate is low, which causes unnecessary resource waste when the UE does not transmit the SRS resource.

In the LTE system, the SRS can be transmitted only on the last SC-FDMA symbol of the uplink subframe and the last 1 or 2 SC-FDMA symbols of the UpPTS subframe, so the uplink SRS resource is very limited, and particularly in the TD-LTE system, the SRS resource is more valuable. When evolving to the LTE-a system, the UE often needs to transmit SRS of multiple antennas at the same time, which results in higher resource overhead.

In order to improve the utilization rate of SRS resources and reduce the expense of the SRS resources, aperiodic SRS transmission is introduced into an LTE-A system. Unlike the periodic SRS, the aperiodic SRS resource is also configured by a higher layer quasi-static, but the UE needs to trigger SRS transmission by sending a DCI (Downlink control information) signaling through the base station, and once triggered, the UE only sends a one-time Sounding signal, but does not send the Sounding signal periodically. Through the aperiodic SRS, the base station can more flexibly obtain the required channel information, reduce the time delay of channel measurement, reduce the resource overhead of the SRS or improve the resource utilization rate of the SRS. The DCI signaling triggering the SRS transmission is DCI format0/4/1A/2B/2C, and an SRS triggering indication domain of 1 bit or 2bit is added in the DCI to indicate whether the UE sends the SRS or not.

For periodic SRS, the protocol supports frequency hopping transmission. For a certain UE, whether to use the frequency hopping method does not need information bits of a higher layer to be specified, but is implicitly determined by a relation between an SRS hopping bandwidth (srshopppingbandwidth) and a single SRS transmission bandwidth (srsBandwidth) of the UE. And when the base station configures the SRS high-level signaling for the UE, the position of each frequency hopping transmission is not explicitly indicated, but only the position of the PRB (frequency-block preamble) of the starting frequency domain of the first transmission is configured for the UE, and the starting position of the frequency band of the frequency hopping transmission is implicitly determined by the SRS transmission times.

Generally, before allocating SRS resources to a UE, it is necessary to determine SRS configuration parameters at a cell level, that is, SRS resource information available to the cell, and then when allocating SRS resources to the UE, allocate SRS configuration parameters in the reserved SRS resources at the cell level, that is, determine SRS configuration parameters at the UE level. The cell-level SRS configuration is shared by all UEs in the cell, and the UE-level SRS parameters are configured for each UE. Therefore, the UE-level configuration is performed based on the cell reserved resources, which is equivalent to the cell-level SRS resource configuration providing an available resource information interface for the UE-level SRS resource configuration.

Before the non-periodic SRS is introduced in LTE-a, only one SRS triggering mode is periodically transmitted, so that the existing algorithm does not consider the SRS triggering type, and only one resource pool, i.e. dedicated SRS resource, exists in the cell SRS resource. After the LTE-A introduces the aperiodic SRS, the periodic SRS and the aperiodic SRS use the SRS time-frequency resource exclusive to the cell for transmission, and the SRS resource is distributed to the UE according to the sequence of the UE accessing the system according to the algorithm of the prior art. Because the periodic SRS resource and the aperiodic SRS resource use the same cell SRS resource pool, the periodic SRS resource and the aperiodic SRS resource can be smoothly allocated to the UE which is accessed into the system firstly, and the problem of resource conflict does not occur, but for the UE which is accessed into the system later, the difficulty of smoothly allocating the periodic SRS resource is higher and higher, the probability of resource allocation failure is higher and higher, because the periodic SRS transmission is determined, the resource at the position of each frequency hopping transmission needs to be ensured to be available for successful allocation, otherwise, the resource allocation is unsuccessful, and secondly, when the resource is allocated, the CS of each SRS port on the same time-frequency resource needs to be ensured to be available no matter whether the periodic SRS or the aperiodic SRS is available. However, the aperiodic SRS is more flexible than the periodic SRS, but needs to occupy PDCCH overhead, and DCI signaling that can trigger the aperiodic SRS transmission is limited, limited by UE uplink transmission power, and not any UE can meet the requirement of large-bandwidth SRS transmission, so that the aperiodic SRS cannot be configured for all UEs without limitation, and the use of the periodic SRS is not considered at all.

Therefore, cell-specific SRS parameters including cell SRS transmission bandwidth configuration, cell SRS transmission period and subframe offset are configured according to all UE configuration period SRS transmission hypotheses in the system, and the two jointly determine SRS time-frequency resources available for the cell. Since the SRS measurement requirements of different UEs and the SRS antenna port configuration requirement information of different UEs are not distinguished, the estimation of the cell SRS resource requirements is rough, and the RRC reconfiguration frequency can be increased; secondly, as the periodic SRS resources and the aperiodic SRS resources share the same SRS resource pool, and the sequence of accessing the system by the UE is different, for the UE accessed into the system later, the probability of failure of the periodic SRS resource allocation is higher and higher due to the difficulty in avoiding the conflict problem when the periodic SRS resources and the aperiodic SRS resources are allocated, the resource utilization rate is low, and the fairness of the SRS resource allocation of the UE cannot be ensured.

Disclosure of Invention

The embodiment of the invention provides a method and a device for allocating cell SRS resources, which are used for solving the problem of conflict between periodic SRS resources and non-periodic SRS resources and improving the utilization rate of the SRS resources.

A method for allocating cell SRS resources comprises the following steps:

when determining that SRS resources need to be allocated to access User Equipment (UE), determining whether the SRS resources needed by the UE are periodic SRS or non-periodic SRS;

when the SRS resource required by the UE is a periodic SRS, allocating the SRS resource for the UE from a predetermined periodic SRS resource pool; when the SRS resource required by the UE is the non-periodic SRS, the SRS resource is allocated to the UE from a predetermined non-periodic SRS resource pool, and the sum of the periodic SRS resource pool and the non-periodic SRS resource pool is a cell SRS resource pool.

A device for configuring cell SRS resources comprises:

a determining unit, configured to determine that a Sounding Reference Signal (SRS) resource required by a User Equipment (UE) is a periodic SRS or a non-periodic SRS when it is determined that the SRS resource needs to be allocated to the UE;

the device comprises an allocation unit and a processing unit, wherein the allocation unit is used for allocating SRS resources for the UE from a predetermined periodic SRS resource pool when the SRS resources required by the UE are periodic SRS; when the SRS resource required by the UE is the non-periodic SRS, the SRS resource is allocated to the UE from a predetermined non-periodic SRS resource pool, and the sum of the periodic SRS resource pool and the non-periodic SRS resource pool is a cell SRS resource pool.

The embodiment of the invention provides a method and a device for allocating cell SRS resources, wherein a cell SRS resource pool is divided into a periodic SRS resource pool and a non-periodic SRS resource pool in advance, when resources are required to be allocated for UE, the resources required by the UE are determined according to the SRS triggering condition of the UE, and when the SRS resources required by the UE are periodic SRS, the SRS resources are allocated for the UE from the predetermined periodic SRS resource pool; when the SRS resource required by the UE is the non-periodic SRS, the SRS resource is allocated to the UE from the predetermined non-periodic SRS resource pool, so that resource conflict caused when the periodic SRS resource and the non-periodic SRS resource are allocated in the cell SRS resource pool at the same time is avoided, and the utilization rate of the SRS resource is improved.

Drawings

Fig. 1 is a flowchart of a method for allocating SRS resources in a cell according to an embodiment of the present invention;

fig. 2 is a flowchart of a more specific method for dividing a cell SRS resource pool according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a device for allocating SRS resources in a cell according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a more specific apparatus for allocating SRS resources in a cell according to an embodiment of the present invention.

Detailed Description

The embodiment of the invention provides a method and a device for allocating cell SRS resources, wherein a cell SRS resource pool is divided into a periodic SRS resource pool and a non-periodic SRS resource pool in advance, when resources are required to be allocated for UE, the resources required by the UE are determined according to the SRS triggering condition of the UE, and when the SRS resources required by the UE are periodic SRS, the SRS resources are allocated for the UE from the predetermined periodic SRS resource pool; when the SRS resource required by the UE is the non-periodic SRS, the SRS resource is allocated to the UE from the predetermined non-periodic SRS resource pool, so that resource conflict caused when the periodic SRS resource and the non-periodic SRS resource are allocated in the cell SRS resource pool at the same time is avoided, and the utilization rate of the SRS resource is improved.

As shown in fig. 1, a method for allocating SRS resources in a cell according to an embodiment of the present invention includes:

step S101, when determining that SRS resources need to be allocated for accessing UE, determining whether the SRS resources needed by the UE are periodic SRS or non-periodic SRS;

step S102, when the SRS resource needed by the UE is a periodic SRS, allocating the SRS resource for the UE from a predetermined periodic SRS resource pool; and when the SRS resource required by the UE is the non-periodic SRS, allocating the SRS resource for the UE from a predetermined non-periodic SRS resource pool, wherein the sum of the periodic SRS resource pool and the non-periodic SRS resource pool is a cell SRS resource pool.

Since the periodic SRS resource pool and the aperiodic SRS resource pool are divided in advance, and the SRS resource is allocated to the UE from the predetermined periodic SRS resource pool and the SRS resource is allocated to the UE from the predetermined aperiodic SRS resource pool, the conflict between the periodic SRS resource allocation and the aperiodic SRS resource allocation can be avoided.

The division of the periodic SRS resource pool and the aperiodic SRS resource pool can be carried out during the configuration of the cell SRS subframe or the reconfiguration of RRC, and the periodic SRS resource pool and the aperiodic SRS resource pool can be adjusted according to the failure rate of resource allocation, so that the resources are more fully utilized.

Specifically, when the periodic SRS resource pool and the aperiodic SRS resource pool are divided, the total number of periodic SRS resource symbols in a single radio frame and the total number of aperiodic SRS resource symbols in a single radio frame may be determined, the number of resources in the periodic SRS resource pool is specifically determined to be the total number of periodic SRS resource symbols in a single radio frame, and the number of resources in the aperiodic SRS resource pool is specifically determined to be the total number of aperiodic SRS resource symbols in a single radio frame.

When determining the total number of periodic SRS resource symbols in a single radio frame and the total number of aperiodic SRS resource symbols in a single radio frame, the maximum SRS transmission bandwidth supportable by a cell may be calculated by combining an uplink system bandwidth and Channel overhead of a PUCCH (Physical uplink control Channel) and a PRACH (Physical Random access Channel) in the system, and quantized to 8 bandwidth configurations specified by a protocol; determining the supportable UE capacity according to the number of SRS resources which can be supported by frequency division (transmission comb) and code division (cyclic shift) on a single time-frequency resource; calculating the number of symbols required by periodic SRS transmission according to the number of UE needing to be configured with periodic SRS transmission in a cell, the proportion of UE configured with different SRS antenna port numbers and the SRS transmission requirements of each UE; calculating the number of symbols required by the aperiodic SRS transmission according to the number of the UEs required to be configured with the aperiodic SRS transmission in the cell, the proportion of the UEs configured with different SRS antenna port numbers and the SRS transmission requirements of each UE; further calculating the total number of SRS symbols required in the cell; and converting the number of SRS symbols required to be configured in a single radio frame according to the total number of SRS symbols in the cell and the SRS transmission requirements of each UE.

At this time, the SRS subframe configuration can be determined by using the number of SRS symbols to be configured in the single radio frame.

When the total number of the periodic SRS resource symbols in a single radio frame is determined, the total number of the periodic SRS resource symbols in the single radio frame can be determined according to the number of the UE supported by the system, namely the total number of the symbols of the periodic SRS transmission to be supported is determined according to the number of the UE, and then the total number of the periodic SRS resource symbols in the single radio frame is determined according to the total number of the symbols of the periodic SRS transmission to be supported, the UE capacity on a single time-frequency resource and the periodic SRS transmission time period;

when the total number of the aperiodic SRS resource symbols in a single radio frame is determined, the aperiodic SRS resources can be multiplexed, so that the total number of the aperiodic SRS transmission to be supported can be determined according to the number of the UE and the probability of triggering the aperiodic SRS transmission on a single time-frequency resource, and then the total number of the aperiodic SRS resource symbols in the single radio frame can be determined according to the total number of the aperiodic SRS transmission to be supported, the UE capacity on the single time-frequency resource and the periodic SRS transmission time period.

Specifically, determining the total number of symbols of the periodic SRS transmission to be supported according to the number of the UEs includes:

determining the number of UE (user equipment) of periodic SRS transmission configured by each port;

determining a total number of symbols for a periodic SRS transmission to be supported

The sum of the number of periodic SRS symbols required by each UE configured for each antenna port.

Determining the number of UEs in periodic SRS transmission configured for each port, specifically including:

determining the number of the UE needing to allocate the periodic SRS resource as N_{period_ue_num}＝p_periodSRS·N_{total_ue_num}Wherein p is_periodSRSThe value range of the UE probability for allocating the periodic SRS resource is (0, 1)]，N_{total_ue_num}Is the number of supported UEs;

determining the number of the UE of the periodic SRS transmission configured by each port as follows:

N_{period_ue_num，n}＝P_n·N_{period_ue_num}，

wherein p is_nFor a UE probability with port number n, n ═ 1, 2, 4,

determining the total number of symbols of the aperiodic SRS transmission to be supported according to the number of the UEs and the probability of triggering the aperiodic SRS transmission on a single time-frequency resource, specifically comprising:

determining the quantity of UE (user equipment) of aperiodic SRS transmission configured by each port;

determining a total number of symbols for a desired aperiodic SRS transmissionThe sum of the number of aperiodic SRS symbols required by each UE configured for each antenna port;

determining a total number of symbols to support aperiodic SRS transmission as:

$N_{\mathrm{aperiod}\_\mathrm{SRS}\_\mathrm{total}\_T_{\min \_\mathrm{period}}}=N_{\mathrm{aperiod}\_\mathrm{SRS}\_\mathrm{total}\_T_{\min \_\mathrm{period}},\mathrm{init}}/K,$

and K is a user multiplexing factor of the aperiodic SRS resource.

Determining the number of UEs in aperiodic SRS transmission configured for each port, specifically including:

determining the number of the UEs needing to allocate the aperiodic SRS resource as follows:

N_{aperiod_ue_num}＝p_aperiodSRS·N_{total_ue_num}，

wherein p is_aperiodSRSThe value range of the UE probability for needing to distribute the non-periodic SRS resource is [0, 1%]，N_{total_ue_num}Is the number of supported UEs;

determining the number of the UE of the aperiodic SRS transmission configured for each port as follows:

N_{aperiod_ue_num，n}＝P_n·N_{aperiod_ue_num}，

wherein p is_nFor a UE probability with port number n, n ═ 1, 2, 4,

determining the total number of the symbols of the periodic SRS resource in a single radio frame according to the total number of the symbols of the periodic SRS transmission to be supported, the UE capacity on a single time-frequency resource and the period of the periodic SRS transmission time, which specifically comprises the following steps:

determining the total number of the periodic SRS resource symbols in a single radio frame as follows:

wherein,total number of symbols for periodic SRS transmission to be supported, C_{single_symbol}For UE capacity, T, on a single time-frequency resource_{min_period}The minimum SRS transmission period requirement which needs to be met by all UE in the system;

determining the total number of the aperiodic SRS resource symbols in a single radio frame according to the total number of the aperiodic SRS transmission to be supported, the UE capacity on a single time-frequency resource and the periodic SRS transmission time period, which specifically comprises the following steps:

determining the total number of the aperiodic SRS resource symbols in a single radio frame as follows:

wherein,

total number of symbols for aperiodic SRS transmission to be supported, C_{single_symbol}For UE capacity, T, on a single time-frequency resource_{min_period}The minimum SRS transmission period requirement that needs to be met for all UEs in the system.

In general, C_{single_symbol}＝RPF×N_{CS_usable_max}Wherein, RPF is a transmission frequency comb with a value of 2, N_{CS_usable_max}The value of CS is the maximum value, and usually the value of CS is {1, 2, 3, 4, 5, 6, 7, 8 }.

After the divided periodic SRS resource pool and the non-periodic SRS resource pool are determined, the cell SRS resource pool, namely the total number of symbols of the SRS resource in a single radio frame, can be determined, and then the cell SRS subframe configuration can be determined by combining the TDD uplink/downlink subframe configuration and the subframe configuration table (extracted from TS36.211) of the TDD system SRS shown in the table 1.

TABLE 1 subframe configuration for TDD System SRS

Further, the triggering of the aperiodic SRS resource requires the occupation of PDCCH resource, so that the aperiodic SRS resource cannot be reserved too much, and the threshold α can be preset_{max_aperiod_srs}To makeObtaining the ratio of the number of resources in the aperiodic SRS resource pool to the number of resources in the cell SRS resource pool to be less than or equal to alpha_{max_aperiod_srs}The set threshold value alpha_{max_aperiod_srs}Preferably not more than 0.5.

As shown in fig. 2, the following describes in detail a process for determining the total number of periodic SRS resource symbols in a single radio frame and the total number of aperiodic SRS resource symbols in a single radio frame, where the process includes:

step S201, determining SRS frequency domain resource allocation of a cell;

since the periodic SRS and the aperiodic SRS in the embodiment of the present invention are only divided from the time domain resource, the frequency domain resources corresponding to the periodic SRS and the aperiodic SRS are both SRS bandwidth configurations that can be supported by the cell.

The SRS bandwidth configuration of the cell mainly considers the uplink system bandwidth, PUCCH channel overhead and PRACH channel overhead of the cell. Since the configuration of the SRS bandwidth of a cell is well known to those skilled in the art, it is not described herein in detail.

Step S202 to step S204 are to determine the SRS time domain resource configuration of the cell, and the SRS time domain resource configuration of the cell mainly considers the cell load and the SRS measurement period requirement of the UE. Dividing the SRS time domain resources of the cell into periodic SRS time domain resources and aperiodic SRS time domain resources, wherein the periodic SRS time domain resource requirements and the aperiodic SRS time domain resource requirements need to be respectively determined:

step S202, determining the number of supportable UE in a single time domain resource;

when the system is initially configured, it is assumed that all UEs transmit SRS in full bandwidth, and user capacity that can be provided on a single time-frequency resource is calculated. For the case of multi-port SRS transmission, the occupied resources are in a multiple relationship with a single port, and can be converted into multiple single-port resources, so that a single-port SRS configuration can be assumed here, and the UE capacity that can be provided on a single time-frequency resource is:

C_{single_symbol}＝RPF×N_{CS_usable_max}＝2N_{CS_usable_max}≤16

where RPF ═ 2, denotes the transmission frequency comb, N_{CS_usable_max}The value of CS is the maximum value and the value range is {1, 2, 3, 4, 5, 6, 7, 8 }.

Step S203, determining the number of UE transmitted by the periodic SRS configured by each port and the number of UE transmitted by the aperiodic SRS configured by each port;

suppose the number of UEs supported in the system is N_{total_ue_num}Wherein, the probability of the UE needing to allocate the periodic SRS resource is p_periodSRSThe value range is (0, 1)]The probability of the UE needing to allocate the non-periodic SRS resource is p_aperiodSRSThe value range is [0, 1 ]]Considering that both periodic and aperiodic SRS can be configured for a single UE, p is therefore allowed_periodSRS+p_aperiodSRSThe number of the UE for allocating the periodic SRS resource is N when the number is more than or equal to 1_{period_ue_num}＝p_periodSRS·N_{total_ue_num}The number of the UE for allocating the aperiodic SRS resource is N_{aperiod_ue_num}＝p_aperiodSRS·N_{total_ue_num}. The UE probabilities of the periodic SRS and the aperiodic SRS may be counted based on respective SRS triggering conditions, for example, the aperiodic SRS may be counted by only configuring the semi-persistent scheduling UE, configuring the SCell activated UE, and the like in consideration of application scenarios thereof. The aperiodic SRS may not be configured if the system load is very low. Meanwhile, the probability of the UE with the number of configured SRS ports n in the system is assumed to be p_n，n＝{1，2，4}，

In the initial configuration, p is determined according to the initial transmission mode of the UE set by the system_nAfter the system runs for a period of time, updating p according to the transmission mode of each UE and the SRS antenna port number requirement_n。

Based on the above assumptions, for UEs configured with periodic SRS transmission, the number of UEs configured with periodic SRS transmission for each port may be represented as N_{period_ue_num，n}＝p_n·N_{period_ue_num}(ii) a For the UEs configured with aperiodic SRS transmission, the number of UEs configured with aperiodic SRS transmission for each port may be expressed asN_{aperiod_ue_num，n}＝p_n·N_{aperiod_ue_num}。

Step S204, determining the total number of symbols of the periodic SRS transmission to be supported;

for the number of antenna ports N, assume at N_{ue_num，n}In each UE, the number of resources required for acquiring uplink channel quality information and downlink beamforming information through SRS transmitted by the UE can be converted into n times of the number of resources required under a single antenna port. And the number of SRS transmission symbols determined under the configuration of a single antenna port is mainly determined according to T_{min_period}Determination of T_{min_period}The method is well known to those skilled in the art and will not be described herein again for the minimum SRS transmission period requirement that all UEs in the system need to meet. After determining the number of SRS symbols required by the UE configured for each antenna port, summing up the number of SRS symbols to obtain the total number of symbols of periodic SRS transmission supported by the system, which is recorded as the total number of symbols of periodic SRS transmission supported by the system

Step S205, determining the total number of the supported non-periodic SRS transmission symbols;

for aperiodic SRS transmission, the time period T of the periodic SRS transmission_{min_period}For reference, assume at T_{min_period}In the method, the total number of SRS resources required by triggering SRS transmission once by UE (user equipment) which estimates all aperiodic SRS transmission by using the method same as the symbol number estimation of the periodic SRS transmission is recorded as

After the aperiodic SRS resource is configured for the UE, the UE actually occupies the aperiodic SRS resource only when receiving a trigger instruction of the base station, and can be used by other UEs under other conditions, so that the user multiplexing factor K of the aperiodic SRS resource is introduced to limit the maximum number of multiplexed users on a single time-frequency resource. The specific value of K depends on the average probability of triggering the aperiodic SRS transmission on a single time-frequency resource in the update period of the CQI and the shaped information. Therefore, aperiodic SRS transmission to be supportedTotal number of symbols transmitted is

1/K of (1), namely:

$N_{\mathrm{aperiod}\_\mathrm{SRS}\_\mathrm{total}\_T_{\min \_\mathrm{period}}}=N_{\mathrm{aperiod}\_\mathrm{SRS}\_\mathrm{total}\_T_{\min \_\mathrm{period}},\mathrm{init}}/K$

in addition, considering that triggering the aperiodic SRS needs to occupy PDCCH resources, so that the resources of the aperiodic SRS cannot be reserved too much, the parameter alpha is suggested to be introduced_{max_aperiod_srs}And the ratio of the non-periodic SRS resource reserved by the limited cell to the total SRS resource of the cell is recommended to be not more than 0.5.

Step S206, determining the total number of symbols of SRS resources in a single radio frame;

calculating the number N of required SC-FDMA symbols of periodic SRS transmission in a single radio frame to meet the SRS transmission requirements of all UE (user equipment) configured with periodic SRS transmission and UE (user equipment) configured with non-periodic SRS transmission in a cell_{period_SRS_subframe_per_frame}And number of SC-FDMA symbols N for aperiodic SRS transmission_{aperiod_SRS_subframe_per_frame}Respectively as follows:

the total number of symbols of the SRS resource within a single radio frame is:

N_{SRS_subframe_per_frame}＝N_{period_SRS_subframe_per_frame}+N_{aperiod_SRS_subframe_per_frame}

at this time, the cell SRS subframe configuration may be further performed according to the total number of SRS resources in a single radio frame.

In order to further flexibly determine a periodic SRS resource pool and an aperiodic SRS resource pool according to the usage of the periodic SRS resource and the aperiodic SRS resource, thereby reducing the reallocation frequency of the cell SRS resource, and the sizes of the periodic SRS resource pool and the aperiodic SRS resource pool can be adjusted in the resource allocation process, at this time, the method for allocating the cell SRS resource provided by the embodiment of the present invention further includes:

determining the probability of the periodic SRS resource allocation failure and the probability of the non-periodic SRS resource allocation failure in a preset statistical time window;

when the difference value of the probability of the periodic SRS resource allocation failure minus the probability of the aperiodic SRS resource allocation failure is larger than a preset first threshold, increasing the number of resources in a periodic SRS resource pool and correspondingly reducing the number of resources in the aperiodic SRS resource pool; when the difference value of the probability of the periodic SRS resource allocation failure minus the probability of the aperiodic SRS resource allocation failure is smaller than a preset second threshold, increasing the number of resources in an aperiodic SRS resource pool and correspondingly reducing the number of resources in the periodic SRS resource pool; the first threshold is greater than the second threshold.

Specifically, the number of the periodic SRS resource pool and the aperiodic SRS resource pool mainly depends on the number of UEs in the system that require the two SRS transmission modes, and when the system is initialized, the SRS resources in the cell may be divided according to the initial configuration, and after the system runs for a period of time, the semi-static adjustment process of the periodic SRS resource and the aperiodic SRS resource may be implemented according to the following method:

firstly, a statistical time window (the suggestion of the length of the time window is not more than an RRC reconfiguration period) is set, the failure probability that a base station attempts to allocate periodic SRS resources and non-periodic SRS resources to UE (user equipment) for RRC connection establishment or reconfiguration is counted, a forgetting factor filtering mode can be introduced for smoothing aiming at the probability, and if the number of attempts in the non-periodic SRS within the statistical time window is 0, the failure probability of the non-periodic SRS is considered to be 0.

The difference value of the periodic SRS resource allocation failure probability and the non-periodic SRS resource allocation failure probability is compared with a preset threshold value (TH)_lowDenotes the lower limit value, TH_highDenotes the upper limit value, TH_high＞TH_low) Comparing; if it is greater than TH_highIf the number of the symbols of the periodic SRS resource is larger than the number of the symbols of the periodic SRS resource, the number of the symbols is larger than the number of the symbols of the periodic SRS resource_{period_SRS_subframe_per_frame}By one step Δ_symbolNum(considering the scarcity of uplink SRS resources, the proposed value is 1 or 2 SC-FDMA symbols), and the number of the adjusted symbols satisfies the following relation:

N_{period_SRS_subframe_per_frame}＝min(N_{new_period_srs}，N_{SRS_subframe_per_frame})

wherein N is_{new_period_srs}For the number of periodic SRS symbols after one step is added:

N_{new_period_srs}＝N_{period_SRS_subframe_per_frame}+Δ_symbolNum

accordingly, the number of symbols N of the aperiodic SRS_{aperiod_SRS_subframe_per_frame}By one step a_symbolNum：

N_{new_aperiod_srs}＝N_{aperiod_SRS_subframe_per_frame}-Δ_symbolNum

The number of the adjusted aperiodic SRS symbols is:

N_{aperiod_SRS_subframe_per_frame}＝max(0，N_{new_aperiod_srs})

if less than TH_lowIf the aperiodic SRS resource is more limited, the number of the symbols N of the aperiodic SRS needs to be reduced_{aperiod_SRS_subframe_per_frame}By one step Δ_symbolNumThe adjusted number of symbols should satisfy the following relationship:

N_{aperiod_SRS_subframe_per_frame}＝min(N_{new_aperiod_srs}，N_{max_aperiod_srs})

wherein N is_{new_aperiod_srs}For the adjusted number of aperiodic SRS symbols:

N_{new_aperiod_srs}＝N_{aperiod_SRS_subframe_per_frame}+Δ_symbolNum，

N_{max_aperiod_srs}the maximum configurable number of aperiodic SRS symbols of the system is as follows:

wherein alpha is_{max_aperiod_srs}The maximum supportable aperiodic SRS resource which represents the system configuration accounts for the proportion of the SRS resources available for the system.

Correspondingly, the number of symbols N of the periodic SRS_{period_SRS_subframe_per_frame}By one step a_symbolNum。

If it is greater than or equal to TH_lowAnd less than or equal to TH_highAnd keeping the original symbol numbers of the periodic SRS and the non-periodic SRS unchanged.

An embodiment of the present invention further provides a device for configuring SRS resources in a cell, as shown in fig. 3, including:

a determining unit 301, configured to determine whether an SRS resource required by a UE is a periodic SRS or an aperiodic SRS when it is determined that the SRS resource needs to be allocated to an access UE;

an allocating unit 302, configured to, when the SRS resource required by the UE is a periodic SRS, allocate the SRS resource to the UE from a predetermined periodic SRS resource pool; and when the SRS resource required by the UE is the non-periodic SRS, allocating the SRS resource for the UE from a predetermined non-periodic SRS resource pool, wherein the sum of the periodic SRS resource pool and the non-periodic SRS resource pool is a cell SRS resource pool.

Since the division of the cell SRS resource pool needs to be performed in advance, at this time, the apparatus further includes:

a dividing unit 303, configured to determine the total number of periodic SRS resource symbols in a single radio frame, and determine that the number of resources in the periodic SRS resource pool is specifically the total number of periodic SRS resource symbols in the single radio frame; and determining the total number of the aperiodic SRS resource symbols in a single radio frame, and determining the resource number in the aperiodic SRS resource pool as the total number of the aperiodic SRS resource symbols in the single radio frame.

The dividing unit 303 determines the total number of periodic SRS resource symbols in a single radio frame, which specifically includes:

determining the total number of symbols of the periodic SRS transmission to be supported according to the number of the UE;

determining the total number of symbols of the periodic SRS resource in a single radio frame according to the total number of the symbols of the periodic SRS transmission to be supported, the UE capacity on the single time-frequency resource and the period of the periodic SRS transmission time;

determining the total number of aperiodic SRS resource symbols in a single radio frame, specifically including:

determining the total number of the symbols of the aperiodic SRS transmission to be supported according to the number of the UE and the probability of triggering the aperiodic SRS transmission on a single time-frequency resource;

and determining the total number of the aperiodic SRS resource symbols in a single radio frame according to the total number of the aperiodic SRS to be supported, the UE capacity on a single time-frequency resource and the period of the periodic SRS transmission time.

The dividing unit 303 determines the total number of symbols of the periodic SRS transmission to be supported according to the number of the UEs, and specifically includes:

determining the number of UE (user equipment) of periodic SRS transmission configured by each port;

determining a total number of symbols for a periodic SRS transmission to be supported

The sum of the number of periodic SRS symbols required by each UE configured for each antenna port.

The dividing unit 303 determines the number of UEs in the periodic SRS transmission configured at each port, which specifically includes:

determining the number of the UE needing to allocate the periodic SRS resource as N_{period_us_num}＝p_periodSRS·N_{total_ue_num}Wherein p is_periodSRSThe value range of the UE probability for allocating the periodic SRS resource is (0, 1)]，N_{total_ue_num}Is the number of supported UEs;

determining the number of the UE of the periodic SRS transmission configured by each port as follows:

N_{period_ue_num，n}＝P_n·N_{period_ue_num}，

wherein p is_nFor a UE probability with port number n, n ═ 1, 2, 4,

the dividing unit 303 determines the total number of symbols of the aperiodic SRS transmission to be supported according to the number of UEs and the probability of triggering the aperiodic SRS transmission on a single time-frequency resource, and specifically includes:

determining the quantity of UE (user equipment) of aperiodic SRS transmission configured by each port;

determining a total number of symbols for a desired aperiodic SRS transmissionThe sum of the number of aperiodic SRS symbols required by each UE configured for each antenna port;

determining a total number of symbols to support aperiodic SRS transmission as:

$N_{\mathrm{aperiod}\_\mathrm{SRS}\_\mathrm{total}\_T_{\min \_\mathrm{period}}}=N_{\mathrm{aperiod}\_\mathrm{SRS}\_\mathrm{total}\_T_{\min \_\mathrm{period}},\mathrm{init}}/K,$

and K is a user multiplexing factor of the aperiodic SRS resource.

The dividing unit 303 determines the number of UEs in aperiodic SRS transmission configured for each port, and specifically includes:

determining the number of the UEs needing to allocate the aperiodic SRS resource as follows:

N_{aperiod_ue_num}＝p_aperiodSRS·N_{total_ue_num}，

wherein p is_aperiodSRSThe value range of the UE probability for needing to distribute the non-periodic SRS resource is [0, 1%]，N_{total_ue_num}Is the number of supported UEs;

determining the number of the UE of the aperiodic SRS transmission configured for each port as follows:

N_{aperiod_ue_num，n}＝P_n·N_{aperiod_ue_num}，

wherein p is_nFor a UE probability with port number n, n ═ 1, 2, 4,

the dividing unit 303 determines the total number of symbols of the periodic SRS resource in a single radio frame according to the total number of symbols of the periodic SRS transmission to be supported, the UE capacity on a single time-frequency resource, and the period SRS transmission time period, and specifically includes:

determining the total number of the periodic SRS resource symbols in a single radio frame as follows:

wherein,

total number of symbols for periodic SRS transmission to be supported, C_{single_symbol}For UE capacity, T, on a single time-frequency resource_{min_period}The minimum SRS transmission period requirement which needs to be met by all UE in the system;

determining the total number of the aperiodic SRS resource symbols in a single radio frame according to the total number of the aperiodic SRS transmission to be supported, the UE capacity on a single time-frequency resource and the periodic SRS transmission time period, which specifically comprises the following steps:

determining the total number of the aperiodic SRS resource symbols in a single radio frame as follows:

wherein,total number of symbols for aperiodic SRS transmission to be supported, C_{single_symbol}For UE capacity, T, on a single time-frequency resource_{min_period}The minimum SRS transmission period requirement that needs to be met for all UEs in the system.

Further, in order to further flexibly determine a periodic SRS resource pool and an aperiodic SRS resource pool according to the usage of the periodic SRS resource and the aperiodic SRS resource, so as to reduce the frequency of cell SRS resource reconfiguration, as shown in fig. 4, the apparatus further includes:

an adjusting unit 304, configured to determine, within a preset statistical time window, a probability of a periodic SRS resource allocation failure and a probability of an aperiodic SRS resource allocation failure; when the difference value of the probability of the periodic SRS resource allocation failure minus the probability of the aperiodic SRS resource allocation failure is larger than a preset first threshold, increasing the number of resources in a periodic SRS resource pool and correspondingly reducing the number of resources in the aperiodic SRS resource pool; when the difference value of the probability of the periodic SRS resource allocation failure minus the probability of the aperiodic SRS resource allocation failure is smaller than a preset second threshold, increasing the number of resources in an aperiodic SRS resource pool and correspondingly reducing the number of resources in the periodic SRS resource pool; the first threshold is greater than the second threshold.

And the ratio of the number of the resources in the aperiodic SRS resource pool to the number of the resources in the cell SRS resource pool is less than or equal to a preset threshold value.

The embodiment of the invention provides a method and a device for allocating cell SRS resources, wherein a cell SRS resource pool is divided into a periodic SRS resource pool and a non-periodic SRS resource pool in advance, when resources are required to be allocated for UE, the resources required by the UE are determined according to the SRS triggering condition of the UE, and when the SRS resources required by the UE are periodic SRS, the SRS resources are allocated for the UE from the predetermined periodic SRS resource pool; when the SRS resource required by the UE is the non-periodic SRS, the SRS resource is allocated to the UE from the predetermined non-periodic SRS resource pool, so that resource conflict caused by the alternate allocation of the periodic SRS resource and the non-periodic SRS resource due to the UE access sequence and the like in the cell SRS resource pool is avoided, and the utilization rate of the SRS resource is improved. On the basis, the periodic SRS resource and the aperiodic SRS resource are further subjected to semi-static adjustment, so that the utilization efficiency of the SRS resource can be improved as much as possible and the reallocation frequency of the cell SRS resource can be reduced on the premise of not changing the configuration of the cell SRS resource.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (20)

1. A method for allocating cell SRS resources is characterized by comprising the following steps:

when determining that SRS resources need to be allocated to access User Equipment (UE), determining whether the SRS resources needed by the UE are periodic SRS or non-periodic SRS;

when the SRS resource required by the UE is a periodic SRS, allocating the SRS resource for the UE from a predetermined periodic SRS resource pool; when the SRS resource required by the UE is the non-periodic SRS, the SRS resource is allocated to the UE from a predetermined non-periodic SRS resource pool, and the sum of the periodic SRS resource pool and the non-periodic SRS resource pool is a cell SRS resource pool.

2. The method of claim 1, further comprising:

determining the total number of the periodic SRS resource symbols in a single radio frame, and determining the resource number in the periodic SRS resource pool to be the total number of the periodic SRS resource symbols in the single radio frame;

and determining the total number of the aperiodic SRS resource symbols in a single radio frame, and determining the resource number in the aperiodic SRS resource pool to be the total number of the aperiodic SRS resource symbols in the single radio frame.

3. The method of claim 2, wherein the determining the total number of periodic SRS resource symbols in a single radio frame comprises:

determining the total number of symbols of the periodic SRS transmission to be supported according to the number of the UE;

determining the total number of the symbols of the periodic SRS resource in a single radio frame according to the total number of the symbols of the periodic SRS transmission to be supported, the UE capacity on the single time-frequency resource and the period of the periodic SRS transmission time;

the determining the total number of aperiodic SRS resource symbols in a single radio frame specifically includes:

determining the total number of the symbols of the aperiodic SRS transmission to be supported according to the number of the UE and the probability of triggering the aperiodic SRS transmission on a single time-frequency resource;

and determining the total number of the aperiodic SRS resource symbols in a single radio frame according to the total number of the supported aperiodic SRS transmission symbols, the UE capacity on a single time-frequency resource and the period of the periodic SRS transmission time.

4. The method of claim 3, wherein the determining the total number of symbols for periodic SRS transmission to be supported based on the number of UEs comprises:

determining the number of UE (user equipment) of periodic SRS transmission configured by each port;

determining a periodic SR to be supportedTotal number of symbols transmitted by S

The sum of the number of periodic SRS symbols required by each UE configured for each antenna port.

5. The method of claim 4, wherein the determining the number of UEs in the periodic SRS transmission configured for each port specifically comprises:

determining the number of the UE needing to allocate the periodic SRS resource as N_{period_ue_num}＝p_periodSRS·N_{total_ue_num}Wherein p is_periodSRSThe value range of the UE probability for allocating the periodic SRS resource is (0, 1)]，N_{total_ue_num}Is the number of supported UEs;

determining the number of the UE of the periodic SRS transmission configured by each port as follows:

N_{period_ue_num，n}＝P_n·N_{period_ue_num}，

wherein p is_nFor a UE probability with port number n, n ═ 1, 2, 4,

6. the method of claim 3, wherein the determining the total number of symbols for aperiodic SRS transmission to be supported according to the number of UEs and the probability of triggering the aperiodic SRS transmission on a single time-frequency resource comprises:

determining the quantity of UE (user equipment) of aperiodic SRS transmission configured by each port;

determining a total number of symbols for a desired aperiodic SRS transmission

The sum of the number of aperiodic SRS symbols required by each UE configured for each antenna port;

determining a total number of symbols to support aperiodic SRS transmission as:

$N_{\mathrm{aperiod}\_\mathrm{SRS}\_\mathrm{total}\_T_{\min \_\mathrm{period}}}=N_{\mathrm{aperiod}\_\mathrm{SRS}\_\mathrm{total}\_T_{\min \_\mathrm{period}},\mathrm{init}}/K,$

and K is a user multiplexing factor of the aperiodic SRS resource.

7. The method of claim 6, wherein the determining the number of UEs for aperiodic SRS transmission configured for each port specifically comprises:

determining the number of the UEs needing to allocate the aperiodic SRS resource as follows:

N_{aperiod_ue_num}＝p_aperiodSRS·N_{total_ue_num}，

wherein p is_aperiodSRSThe value range of the UE probability for needing to distribute the non-periodic SRS resource is [0, 1%]，N_{total_ue_num}Is the number of supported UEs;

determining the number of the UE of the aperiodic SRS transmission configured for each port as follows:

N_{aperiod_ue_num，n}＝P_n·N_{aperiod_ue_num}，

wherein p is_nFor a UE probability with port number n, n ═ 1, 2, 4,

8. the method of claim 3, wherein the determining the total number of periodic SRS resource symbols in a single radio frame according to the total number of periodic SRS transmissions to be supported, the UE capacity on a single time-frequency resource, and the periodic SRS transmission time period comprises:

determining the total number of the periodic SRS resource symbols in a single radio frame as follows:

wherein,

total number of symbols for periodic SRS transmission to be supported, C_{single_symbol}For UE capacity, T, on a single time-frequency resource_minperiodThe minimum SRS transmission period requirement which needs to be met by all UE in the system;

determining the total number of the aperiodic SRS resource symbols in a single radio frame according to the total number of the supported aperiodic SRS transmission symbols, the UE capacity on a single time-frequency resource and the period of the periodic SRS transmission time, which specifically comprises the following steps:

determining the total number of the aperiodic SRS resource symbols in a single radio frame as follows:

wherein,

total number of symbols for aperiodic SRS transmission to be supported, C_{single_symbol}For UE capacity, T, on a single time-frequency resource_{min_period}The minimum SRS transmission period requirement that needs to be met for all UEs in the system.

9. The method of claim 1, further comprising:

determining the probability of the periodic SRS resource allocation failure and the probability of the non-periodic SRS resource allocation failure in a preset statistical time window;

when the difference value of the probability of the periodic SRS resource allocation failure minus the probability of the aperiodic SRS resource allocation failure is larger than a preset first threshold, increasing the number of resources in a periodic SRS resource pool and correspondingly reducing the number of resources in the aperiodic SRS resource pool; when the difference value of the probability of the periodic SRS resource allocation failure minus the probability of the aperiodic SRS resource allocation failure is smaller than a preset second threshold, increasing the number of resources in an aperiodic SRS resource pool and correspondingly reducing the number of resources in the periodic SRS resource pool; the first threshold is greater than the second threshold.

10. The method of claim 1, wherein a ratio of the number of resources in the aperiodic SRS resource pool to the number of resources in a cell SRS resource pool is less than or equal to a predetermined threshold.

11. An apparatus for configuring cell SRS resource, comprising:

a determining unit, configured to determine that a Sounding Reference Signal (SRS) resource required by a User Equipment (UE) is a periodic SRS or a non-periodic SRS when it is determined that the SRS resource needs to be allocated to the UE;

the device comprises an allocation unit and a processing unit, wherein the allocation unit is used for allocating SRS resources for the UE from a predetermined periodic SRS resource pool when the SRS resources required by the UE are periodic SRS; when the SRS resource required by the UE is the non-periodic SRS, the SRS resource is allocated to the UE from a predetermined non-periodic SRS resource pool, and the sum of the periodic SRS resource pool and the non-periodic SRS resource pool is a cell SRS resource pool.

12. The apparatus of claim 11, further comprising:

the dividing unit is used for determining the total number of the periodic SRS resource symbols in a single radio frame and determining that the resource number in the periodic SRS resource pool is specifically the total number of the periodic SRS resource symbols in the single radio frame; and determining the total number of the aperiodic SRS resource symbols in a single radio frame, and determining the resource number in the aperiodic SRS resource pool to be the total number of the aperiodic SRS resource symbols in the single radio frame.

13. The apparatus of claim 12, wherein the unit for determining the total number of periodic SRS resource symbols in a single radio frame comprises:

determining the total number of symbols of the periodic SRS transmission to be supported according to the number of the UE;

determining the total number of the symbols of the periodic SRS resource in a single radio frame according to the total number of the symbols of the periodic SRS transmission to be supported, the UE capacity on the single time-frequency resource and the period of the periodic SRS transmission time;

the determining the total number of aperiodic SRS resource symbols in a single radio frame specifically includes:

determining the total number of the symbols of the aperiodic SRS transmission to be supported according to the number of the UE and the probability of triggering the aperiodic SRS transmission on a single time-frequency resource;

and determining the total number of the aperiodic SRS resource symbols in a single radio frame according to the total number of the supported aperiodic SRS transmission symbols, the UE capacity on a single time-frequency resource and the period of the periodic SRS transmission time.

14. The apparatus of claim 13, wherein the dividing unit determines a total number of symbols of periodic SRS transmission to be supported according to the number of UEs, and specifically comprises:

determining the number of UE (user equipment) of periodic SRS transmission configured by each port;

determining a total number of symbols for a periodic SRS transmission to be supported

The sum of the number of periodic SRS symbols required by each UE configured for each antenna port.

15. The apparatus according to claim 14, wherein the determining, by the dividing unit, the number of UEs in periodic SRS transmission configured for each port specifically includes:

determining the number of the UE needing to allocate the periodic SRS resource as N_{period_ue_num}＝p_periodSRS·N_{toral_ue_num}Wherein p is_periodSRSThe value range of the UE probability for allocating the periodic SRS resource is (0, 1)]，N_{total_ue_num}Is the number of supported UEs;

determining the number of the UE of the periodic SRS transmission configured by each port as follows:

N_{period_ue_num，n}＝P_n·N_{period_ue_num}，

wherein p is_nFor a UE probability with port number n, n ═ 1, 2, 4,

16. the apparatus of claim 13, wherein the dividing unit determines a total number of symbols of the aperiodic SRS transmission to be supported according to the number of UEs and a probability of triggering the aperiodic SRS transmission on a single time-frequency resource, and specifically includes:

determining the quantity of UE (user equipment) of aperiodic SRS transmission configured by each port;

determining a total number of symbols for a desired aperiodic SRS transmissionThe sum of the number of aperiodic SRS symbols required by each UE configured for each antenna port;

determining a total number of symbols to support aperiodic SRS transmission as:

$N_{\mathrm{aperiod}\_\mathrm{SRS}\_\mathrm{total}\_T_{\min \_\mathrm{period}}}=N_{\mathrm{aperiod}\_\mathrm{SRS}\_\mathrm{total}\_T_{\min \_\mathrm{period}},\mathrm{init}}/K,$

and K is a user multiplexing factor of the aperiodic SRS resource.

17. The apparatus according to claim 16, wherein the determining, by the dividing unit, the number of UEs in aperiodic SRS transmission configured for each port specifically includes:

determining the number of the UEs needing to allocate the aperiodic SRS resource as follows:

N_{aperiod_ue_num}＝p_aperiodSRS·N_{total_ue_num}，

wherein p is_aperiodSRSThe value range of the UE probability for needing to distribute the non-periodic SRS resource is [0, 1%]，N_{total_ue_num}Is the number of supported UEs;

determining the number of the UE of the aperiodic SRS transmission configured for each port as follows:

N_{aperiod_ue_num，n}＝P_n·N_{aperiod_ue_num}，

wherein p is_nFor a UE probability with port number n, n ═ 1, 2, 4,

18. the apparatus of claim 13, wherein the determining, by the partitioning unit, the total number of periodic SRS resource symbols in a single radio frame according to the total number of periodic SRS transmission symbols to be supported, the UE capacity on a single time-frequency resource, and the periodic SRS transmission time period specifically comprises:

determining the total number of the periodic SRS resource symbols in a single radio frame as follows:

wherein,total number of symbols for periodic SRS transmission to be supported, C_{single_symbol}For UE capacity, T, on a single time-frequency resource_{min_period}The minimum SRS transmission period requirement which needs to be met by all UE in the system;

determining the total number of the aperiodic SRS resource symbols in a single radio frame according to the total number of the supported aperiodic SRS transmission symbols, the UE capacity on a single time-frequency resource and the period of the periodic SRS transmission time, which specifically comprises the following steps:

determining the total number of the aperiodic SRS resource symbols in a single radio frame as follows:

wherein,

total number of symbols for aperiodic SRS transmission to be supported, C_{single_symbol}For UE capacity, T, on a single time-frequency resource_{min_period}The minimum SRS transmission period requirement that needs to be met for all UEs in the system.

19. The apparatus of claim 11, further comprising:

the adjusting unit is used for determining the probability of the periodic SRS resource allocation failure and the probability of the non-periodic SRS resource allocation failure in a preset statistical time window; when the difference value of the probability of the periodic SRS resource allocation failure minus the probability of the aperiodic SRS resource allocation failure is larger than a preset first threshold, increasing the number of resources in a periodic SRS resource pool and correspondingly reducing the number of resources in the aperiodic SRS resource pool; when the difference value of the probability of the periodic SRS resource allocation failure minus the probability of the aperiodic SRS resource allocation failure is smaller than a preset second threshold, increasing the number of resources in an aperiodic SRS resource pool and correspondingly reducing the number of resources in the periodic SRS resource pool; the first threshold is greater than the second threshold.

20. The apparatus of claim 11, wherein a ratio of the number of resources in the aperiodic SRS resource pool to the number of resources in a cell SRS resource pool is less than or equal to a predetermined threshold.

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