CN116506094B - SRS resource allocation method and device based on multiple users for 5G small cell equipment - Google Patents

SRS resource allocation method and device based on multiple users for 5G small cell equipment Download PDF

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Publication number
CN116506094B
CN116506094B CN202310764042.1A CN202310764042A CN116506094B CN 116506094 B CN116506094 B CN 116506094B CN 202310764042 A CN202310764042 A CN 202310764042A CN 116506094 B CN116506094 B CN 116506094B
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time slot
allocated
narrowband
hopping
srs
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CN116506094A (en
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雷雨濛
赵强
杨妍
冯琳芳
徐一帆
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Shenzhen Guoren Wireless Communication Co Ltd
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Shenzhen Guoren Wireless Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application relates to a multi-user-based SRS resource allocation method and a multi-user-based SRS resource allocation device of 5G small base station equipment, which are used for calculating an index number of a time slot to be allocated if SRS resources can be allocated to UE in a time domain in a current period according to a time domain SRS resource allocation scheme, and allocating corresponding time slots to the UE so as to send SRS signals; according to the frequency domain SRS resource allocation scheme, if SRS resources can be allocated to the UE in the frequency domain in the current period, calculating index numbers of the narrowband hopping to be allocated, and allocating corresponding narrowband hopping to the UE to send SRS signals; according to the code division SRS resource allocation scheme, if SRS resources can be allocated to the UE in the extended ZC sequence in the current period, calculating index numbers of the cyclic shifted ZC sequence to be allocated and the superimposed narrowband frequency hopping, and allocating the narrowband frequency hopping after the corresponding ZC sequence is superimposed to the UE so as to transmit SRS signals. The application can allocate SRS resources for the UE in a mode of expanding ZC sequences by adopting time domain, frequency domain, and can utilize the existing resources to the greatest extent and support the greatest UE access number.

Description

SRS resource allocation method and device based on multiple users for 5G small cell equipment
Technical Field
The application relates to the technical field of mobile communication, in particular to a multi-user-based SRS resource allocation method and device for 5G small base station equipment.
Background
In a mobile communication 5G system, SRS (sounding reference signal ) is transmitted by a user equipment UE to a gNB as an uplink reference signal of NR, and is mainly used for estimating uplink channel frequency domain information, acquiring downlink channel information when channel reciprocity is satisfied, and uplink beam management. The gNB performs resource scheduling adjustment and link self-adaption on the uplink channel information obtained through SRS measurement, so that resources are utilized to the maximum extent, and the conversion rate of the resources is improved, and therefore the SRS plays a very important role in a 5G system.
For TDD (Time Division Duplexing, time division duplex), the 5g TS 38.211 protocol specifies that the SRS signal can continuously transmit 1 or 2 or 4 consecutive SRS signals within the last 6 symbols in the uplink slot U-slot and the special slot S-slot. In the frequency domain, the minimum bandwidth of SRS Resource allocation is 4 RBs (Resource blocks), and the maximum bandwidth is 272 RBs, each RB being composed of 12 subcarriers in the frequency domain. The SRS resource has a comb structure (comb) in the frequency domain, that is, one subcarrier is selected to carry SRS only for every nth subcarrier. Here N may be configured with 2 or 4, commonly referred to as comb-2 or comb-4. SRS signals transmitted by different terminals are multiplexed on the same frequency domain range through the frequency domain, that is, different comb is allocated, that is, different frequency offset is dealt with. For comb-2 configuration, the SRS transmitted by each terminal occupies one of every two subcarriers, so that frequency domain multiplexing of 2 SRS can be realized. Similarly, for comb-4 configuration, frequency domain multiplexing of at most 4 SRSs is configured. Different UEs may use the same SRS physical resource, and at this time, different SRS ports of different UEs are multiplexed by different cyclic shifts. Different transmission comb configurations are specified in the 5G protocol, and the number of supported maximum cyclic shifts is also different. For comb-2 configuration, the maximum number of cyclic shiftsFor comb-4 configuration, the maximum number of cyclic shifts +.>。
The period specified in the 5G protocol for transmitting SRS signals may be configured as {1,2,4,5,8,10,16,20,32,40,64,80,160,230,640,1280,2560} slots. The cell-specific subframe offset in the corresponding cell-specific subframe configuration period is the subframe that the cell UE can use to transmit SRS. Because the SRS bandwidth resources are limited, each UE cannot allocate SRS bandwidth of the entire system, so in order to enable the base station to obtain channel information of the UE unallocated frequency band, the 5G protocol allows the UE to obtain channel information of other frequency bands by using a frequency hopping method.
The SRS resource allocation may have a plurality of different manners according to the above-mentioned available various technical conditions, and also has many limitations due to the effects of the frequency domain comb structure, frequency hopping, different SRS transmission periods, and the like. For example, in a multi-user scenario, the SRS resource allocation is limited, and in the SRS resource allocation, the maximum UE number of the 5G small cell device needs to be satisfied at the same time, and the SRS data processing capability of the physical layer needs to be considered. If the number of access UE is too large, the physical layer has the risk of overtime processing, so that the 5G small base station equipment is crashed; if the number of access UE is reduced, the UE number test index in the coverage area of the base station is not satisfied.
Therefore, it is needed to propose a method and a device for allocating SRS resources based on multiple users for a 5G small cell device, which are simpler, more effective and higher in utilization.
Disclosure of Invention
The technical problem to be solved by the application is to provide a multi-user-based SRS resource allocation method and device for 5G small base station equipment, which can utilize the existing resources to the greatest extent and support the largest UE access number.
In order to solve the technical problems, the application provides a multi-user-based SRS resource allocation method for 5G small cell equipment, which comprises the following steps:
s1, judging whether SRS resources can be allocated to the UE in a time domain or not in a current period according to a preset time domain SRS resource allocation scheme, if so, calculating to obtain an index number of a time slot to be allocated currently, and allocating a corresponding time slot to the UE to send SRS signals; if not, executing the step S2;
s2, judging whether SRS resources can be allocated to the UE in the frequency domain or not in the current period according to a preset frequency domain SRS resource allocation scheme, if so, calculating to obtain an index number of the current narrowband hopping to be allocated, and allocating corresponding narrowband hopping to the UE to send SRS signals; if not, executing the step S3;
s3, judging whether SRS resources can be allocated to the UE in the extended ZC sequence in the current period according to a preset code division SRS resource allocation scheme, if so, calculating index numbers of the cyclic shifted ZC sequence and the superimposed narrowband hopping, and allocating the narrowband hopping after the corresponding ZC sequence to the UE for transmitting SRS signals.
Further, the preset time domain SRS resource allocation scheme includes: all uplink time slots and special time slots in one period are configured based on the 5G TS 38.211 protocol to be distributed to the UE so as to send SRS signals, wherein the distribution sequence starts from the first uplink time slot or the first special time slot arranged at the forefront;
the preset frequency domain SRS resource allocation scheme comprises the following steps: configuring narrowband hopping of all uplink time slots and special time slots in one period based on a 5G TS 38.211 protocol to allocate the narrowband hopping to the UE to send SRS signals, wherein the allocation sequence starts from the first narrowband hopping of the first uplink time slot or the first narrowband hopping of the first special time slot;
the preset code division SRS resource allocation scheme comprises the following steps: the narrowband hopping of the overlapped ZC sequences of all uplink time slots and special time slots in one period is configured based on the 5G TS 38.211 protocol to be distributed to the UE to send SRS signals, and the distribution sequence starts from the narrowband hopping of the first overlapped ZC sequence of the first uplink time slot or the narrowband hopping of the first overlapped ZC sequence of the first special time slot.
Further, the period includes at least two uplink time slots and one special time slot.
Further, the preset time domain SRS resource allocation scheme includes: the uplink time slot and the special time slot can be respectively allocated to one UE to transmit SRS signals;
the preset frequency domain SRS resource allocation scheme comprises the following steps: the uplink time slot and the special time slot respectively comprise at most 24 narrowband frequency hopping, and each narrowband frequency hopping can be allocated to one UE to transmit SRS signals;
the preset code division SRS resource allocation scheme comprises the following steps: the uplink time slot and the special time slot respectively comprise at most 24 narrowband hopping frequencies, each narrowband hopping frequency can be overlapped with at most 12 ZC sequences, and each narrowband hopping frequency overlapped with one ZC sequence can be distributed to one UE to transmit SRS signals.
Further, the calculating to obtain the index number of the current time slot to be allocated includes: traversing the time domain of the uplink time slot and the special time slot in the current period, and calculating the index number of the time slot to be allocated currently according to the index number of the last allocated time slot and the arrangement position of the downlink time slot and the uplink time slot and the special time slot;
the calculating to obtain the index number of the narrowband hopping to be allocated currently comprises the following steps: according to a preset comb density K TC The initial frequency hopping position of the current period and the index number of the last allocated narrowband frequency hopping calculate the index number of the narrowband frequency hopping to be allocated currently;
the calculating the ZC sequence after cyclic shift comprises the following steps: phase according to frequency domain cyclic shiftAnd calculating the index numbers of the current cyclic shifted ZC sequence to be allocated and the superimposed narrowband frequency hopping, wherein the cyclic shift parameter->。
In order to solve the technical problem, the application also provides a multi-user-based SRS resource allocation device of the 5G small base station equipment, which comprises an SRS resource pre-allocation unit, an SRS resource allocation unit, a time domain allocation calculation unit, a frequency domain allocation calculation unit and a cyclic shift calculation unit;
the SRS resource pre-configuration unit pre-configures a time domain SRS resource configuration scheme, a frequency domain SRS resource configuration scheme and a code division SRS resource configuration scheme;
the SRS resource allocation unit judges whether the SRS resource can be allocated to the UE in the time domain according to a preset time domain SRS resource allocation scheme, if so, allocates a corresponding time slot to the UE according to the calculated index number of the current time slot to be allocated so as to send SRS signals; if not, judging whether SRS resources can be allocated to the UE in the frequency domain or not according to a preset frequency domain SRS resource allocation scheme, if so, allocating corresponding narrowband frequency hopping to the UE according to the calculated index number of the narrowband frequency hopping to be allocated currently so as to send SRS signals; if not, judging whether SRS resources can be allocated to the UE in the extended ZC sequence in the current period according to a preset code division SRS resource allocation scheme, if so, allocating the narrowband hopping after overlapping the corresponding ZC sequence to the UE according to the calculated cyclic shifted ZC sequence to be allocated and the index number of the overlapped narrowband hopping to send SRS signals;
the time domain allocation calculation unit calculates an index number of a current time slot to be allocated and sends the index number to the SRS resource allocation unit;
the frequency domain allocation calculation unit calculates an index number of the current narrowband hopping to be allocated and sends the index number to the SRS resource allocation unit;
and the cyclic shift calculating unit calculates the ZC sequence after the cyclic shift to be allocated currently and sends the ZC sequence to the SRS resource allocation unit.
Still further, the SRS resource pre-configuration unit further includes: all uplink time slots and special time slots in one period are configured based on the 5G TS 38.211 protocol to be distributed to the UE so as to send SRS signals, wherein the distribution sequence starts from the first uplink time slot or the first special time slot arranged at the forefront; configuring narrowband hopping of all uplink time slots and special time slots in one period based on a 5G TS 38.211 protocol to allocate the narrowband hopping to the UE to send SRS signals, wherein the allocation sequence starts from the first narrowband hopping of the first uplink time slot or the first narrowband hopping of the first special time slot; and configuring narrowband hopping frequencies of the overlapped ZC sequences of all uplink time slots and special time slots in one period based on the 5G TS 38.211 protocol to be distributed to the UE to transmit SRS signals, wherein the distribution sequence starts from the narrowband hopping frequency of the first overlapped ZC sequence of the first uplink time slot or the narrowband hopping frequency of the first overlapped ZC sequence of the first special time slot.
Further, the period includes at least two uplink time slots and one special time slot.
Further, the preset time domain SRS resource allocation scheme includes: the uplink time slot and the special time slot can be respectively allocated to one UE to transmit SRS signals;
the preset frequency domain SRS resource allocation scheme comprises the following steps: the uplink time slot and the special time slot respectively comprise at most 24 narrowband frequency hopping, and each narrowband frequency hopping can be allocated to one UE to transmit SRS signals;
the preset code division SRS resource allocation scheme comprises the following steps: the uplink time slot and the special time slot respectively comprise at most 24 narrowband hopping frequencies, each narrowband hopping frequency can be overlapped with at most 12 ZC sequences, and each narrowband hopping frequency overlapped with one ZC sequence can be distributed to one UE to transmit SRS signals.
Still further, the time domain allocation calculation unit further includes: traversing the time domain of the uplink time slot and the special time slot in the current period, and calculating the index number of the time slot to be allocated currently according to the index number of the last allocated time slot and the arrangement position of the downlink time slot and the uplink time slot and the special time slot;
the frequency domain allocation calculation unit further includes: according to a preset comb density K TC The initial frequency hopping position of the current period and the index number of the last allocated narrowband frequency hopping calculate the index number of the narrowband frequency hopping to be allocated currently;
the cyclic shift calculation unit further includes: phase according to frequency domain cyclic shiftAnd calculating the index numbers of the current cyclic shifted ZC sequence to be allocated and the superimposed narrowband frequency hopping, wherein the cyclic shift parameter->。
Compared with the prior art, the application has the following beneficial effects: the application can allocate SRS resources for the UE in a mode of expanding ZC sequences by adopting time domain, frequency domain, and can utilize the existing resources to the greatest extent and support the greatest UE access number.
Drawings
Fig. 1 is a step diagram of a multi-user-based SRS resource allocation method for a 5G small cell device according to the embodiment of the present application;
fig. 2 is a block diagram of a structure of a multi-user based SRS resource allocation apparatus for a 5G small cell device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged where appropriate to implement in other sequences than those of the embodiments of the application.
As shown in fig. 1, the SRS resource allocation method based on multiple users for the 5G small cell device according to the embodiment of the present application includes the following steps:
s1, judging whether SRS resources can be allocated to the UE in a time domain or not in a current period according to a preset time domain SRS resource allocation scheme, if so, calculating to obtain an index number of a time slot to be allocated currently, and allocating a corresponding time slot to the UE to send SRS signals; if not, step S2 is performed.
Specifically, in this embodiment, the preset time domain SRS resource allocation scheme includes: all uplink slots and special slots in one period are configured based on the 5G TS 38.211 protocol to be allocated to the UE to transmit SRS signals, and the allocation sequence starts from the first uplink slot or the first special slot arranged at the front. At least two uplink time slots and one special time slot are included in one period. Wherein, one uplink slot or one special slot may be allocated to one UE to transmit SRS signals.
The calculating to obtain the index number of the current time slot to be allocated comprises the following steps: traversing the time domain of the uplink time slot and the special time slot in the current period, and calculating the index number of the time slot to be allocated currently according to the index number of the last allocated time slot and the arrangement position of the downlink time slot and the uplink time slot and the special time slot.
Assume that a period configured based on the 5g TS 38.211 protocol includes 10 slots, which are sequentially arranged into 7 downlink slots D-slots, 1 special slot S-slots, and 2 uplink slots U-slots. The slot index number of the 10 slots is from 0 to 9, and only the last 1 symbol of the 1 special slot S-slot and the 2 uplink slots U-slot is allocated to the UE to transmit 1 SRS signal.
Assuming that SRS resources are not allocated in the current period, after receiving an SRS resource allocation request of the first access UE, calculating to obtain an index number of 7 of a time slot to be allocated currently; after receiving an SRS resource allocation request of the second access UE, calculating to obtain an index number of 8 of the current time slot to be allocated; after receiving an SRS resource allocation request of the third access UE, calculating to obtain an index number 9 of the current time slot to be allocated; after receiving the request for allocating SRS resources of the fourth access UE, it is determined that the SRS resources cannot be allocated to the UE in the time domain in the current period, and step S2 is entered.
S2, judging whether SRS resources can be allocated to the UE in the frequency domain or not in the current period according to a preset frequency domain SRS resource allocation scheme, if so, calculating to obtain an index number of the current narrowband hopping to be allocated, and allocating corresponding narrowband hopping to the UE to send SRS signals; if not, step S3 is performed.
Specifically, in this embodiment, the preset frequency domain SRS resource allocation scheme includes: the narrowband hopping of all uplink slots and special slots in one period is configured based on the 5g TS 38.211 protocol to allocate to the UE to transmit SRS signals, and the allocation sequence starts from the first narrowband hopping of the first uplink slot or the first narrowband hopping of the first special slot. At least two uplink time slots and one special time slot are included in one period, wherein one uplink time slot or one special time slot respectively comprises at most 24 narrowband hopping frequencies, and each narrowband hopping frequency can be allocated to one UE to transmit SRS signals.
The calculating to obtain the index number of the current to-be-allocated narrowband hopping comprises the following steps: according to a preset comb density K TC And calculating the index number of the narrowband hopping to be allocated currently according to the initial hopping position of the current period and the index number of the last allocated narrowband hopping.
Assuming that in the example of step S1, the SRS resource allocation request of the fourth access UE is received, and there is no slot that can be allocated in the time domain, it is determined whether the SRS resource can be allocated in the frequency domain for the UE in the current period. Assume that a period configured based on the 5g TS 38.211 protocol includes 10 slots, which are sequentially arranged into 7 downlink slots D-slots, 1 special slot S-slots, and 2 uplink slots U-slots. An uplink time slot U-slot and a special time slot S-slot respectively comprise 24 narrowband frequency hopping, the index number of the narrowband frequency hopping is from 0 to 71, and the comb density is K TC 2, and all UEs are configured for full frequency hopping, i.e., UEs hop within SRS frequency band resources of the cell in which they are located.
Then, it can be determined that SRS resources can be allocated to the current fourth UE in the frequency domain, and an index number of the narrowband hopping to be allocated currently is calculated to be 0; after receiving a request for allocating SRS resources of the fifth access UE, calculating to obtain an index number of 2 of the narrowband hopping to be allocated currently; after receiving the request for allocating SRS resources of the sixth access UE, calculating to obtain the index number of the narrowband hopping to be allocated currently as 4. After receiving a request for allocating SRS resources of forty access UEs, calculating to obtain an index number of the narrowband hopping to be allocated currently as 1; after receiving forty SRS resource allocation requests of access UE, calculating to obtain the index number of the current narrowband hopping to be allocated as 3; until the seventy-six requests for allocating SRS resources to access the UE are received, if it is determined that the SRS resources cannot be allocated to the UE in the frequency domain in the current period, step S3 is executed.
S3, judging whether SRS resources can be allocated to the UE in the extended ZC sequence in the current period according to a preset code division SRS resource allocation scheme, if so, calculating to obtain a ZC (Zadoff-chu) sequence after cyclic shift to be allocated currently and an index number of the superimposed narrowband hopping, and allocating the narrowband hopping after the corresponding ZC sequence is superimposed to the UE to send SRS signals.
Specifically, in this embodiment, the preset code division SRS resource allocation scheme includes: the narrowband hopping of the overlapped ZC sequences of all uplink time slots and special time slots in one period is configured based on the 5G TS 38.211 protocol to be distributed to the UE to send SRS signals, and the distribution sequence starts from the narrowband hopping of the first overlapped ZC sequence of the first uplink time slot or the narrowband hopping of the first overlapped ZC sequence of the first special time slot. At least two uplink time slots and one special time slot are included in one period, wherein one uplink time slot and one special time slot respectively comprise at most 24 narrowband hopping frequencies, each narrowband hopping frequency can be overlapped with at most 12 ZC sequences, and each narrowband hopping frequency overlapped with one ZC sequence can be distributed to one UE to transmit SRS signals.
The calculation of the cyclic shifted ZC sequence includes: phase according to frequency domain cyclic shiftAnd calculating the index numbers of the current cyclic shifted ZC sequence to be allocated and the superimposed narrowband frequency hopping, wherein the cyclic shift parameter->。
It is assumed that, in the example of step S2, after receiving the request for allocating SRS resources for the seventy-six access UEs, it is determined that the SRS resources cannot be allocated to the UE in the frequency domain in the current period, and then it is determined whether the SRS resources can be allocated to the UE in the extended ZC sequence in the current period. Assume that a period configured based on the 5g TS 38.211 protocol includes 10 slots, which are sequentially arranged into 7 downlink slots D-slots, 1 special slot S-slots, and 2 uplink slots U-slots. An uplink time slot U-slot and a special time slot S-slot respectively comprise 24 narrowband hopping frequencies, the index number of the narrowband hopping frequencies is from 0 to 71, each narrowband hopping frequency can be overlapped with 2 ZC sequences,each narrowband superimposed with a ZC sequenceFrequency hopping may be allocated to one UE to transmit SRS signals.
Then, it can be determined that SRS resources can be allocated to the current seventy-six UEs in the extended ZC sequence, and the index number of the narrowband hopping to be allocated is calculated to be 0, and the phase of the ZC sequence after cyclic shift is calculatedDistributing the ZC sequence with the narrowband hopping index number of 0 after the narrowband hopping superposition cyclic shift to seventy-six UE; after receiving the SRS resource allocation request of seventy-seventh UE, calculating to obtain that the index number of the narrowband hopping to be allocated is 0, and the phase of the ZC sequence after cyclic shift is +.>Distributing the ZC sequence with the narrowband hopping index number of 0 after the narrowband hopping superposition cyclic shift to seventy-seventh UE; after receiving the SRS resource allocation request of seventy-eight UE, calculating to obtain that the index number of the narrowband hopping to be allocated is 1, and the phase of the ZC sequence after cyclic shift is +.>Distributing the ZC sequence with the narrowband hopping index number of 1 after the narrowband hopping superposition cyclic shift to seventy-eight UE; after receiving the SRS resource allocation request of seventy-eight UE, calculating to obtain that the index number of the narrowband hopping to be allocated is 1, and the phase of the ZC sequence after cyclic shift is +.>And distributing the ZC sequence after the cyclic shift of the narrowband hopping superposition with the narrowband hopping index number of 1 to seventy-eight UE.
If the resources of the extended ZC sequence are also used up, switching to the next period, and continuing the time domain, the frequency domain and SRS resource allocation of the extended ZC sequence of the next round.
As shown in fig. 2, the SRS resource allocation apparatus based on multiple users for a 5G small cell device according to the embodiment of the present application includes an SRS resource pre-allocation unit, an SRS resource allocation unit, a time domain allocation calculation unit, a frequency domain allocation calculation unit, and a cyclic shift calculation unit.
And the SRS resource pre-configuration unit pre-configures a time domain SRS resource configuration scheme, a frequency domain SRS resource configuration scheme and a code division SRS resource configuration scheme.
Specifically, the SRS resource pre-configuration unit includes configuring all uplink time slots and special time slots in a period based on the 5g TS 38.211 protocol to be allocated to the UE to transmit the SRS signal, where the allocation sequence starts from the first uplink time slot or the first special time slot that is arranged in the first; configuring narrowband hopping of all uplink time slots and special time slots in one period based on a 5G TS 38.211 protocol to allocate the narrowband hopping to the UE to send SRS signals, wherein the allocation sequence starts from the first narrowband hopping of the first uplink time slot or the first narrowband hopping of the first special time slot; and configuring narrowband hopping frequencies of the overlapped ZC sequences of all uplink time slots and special time slots in one period based on the 5G TS 38.211 protocol to be distributed to the UE to transmit SRS signals, wherein the distribution sequence starts from the narrowband hopping frequency of the first overlapped ZC sequence of the first uplink time slot or the narrowband hopping frequency of the first overlapped ZC sequence of the first special time slot. In this embodiment, at least two uplink timeslots and one special timeslot are included in one period.
The preset time domain SRS resource allocation scheme comprises an uplink time slot and a special time slot which can be respectively allocated to one UE to send SRS signals; the preset frequency domain SRS resource configuration scheme comprises the following steps: the uplink time slot and the special time slot respectively comprise at most 24 narrowband frequency hopping, and each narrowband frequency hopping can be allocated to one UE to transmit SRS signals; the preset code division SRS resource allocation scheme comprises the following steps: the uplink time slot and the special time slot respectively comprise at most 24 narrowband hopping frequencies, each narrowband hopping frequency can be overlapped with at most 12 ZC sequences, and each narrowband hopping frequency overlapped with one ZC sequence can be distributed to one UE to transmit SRS signals.
The SRS resource allocation unit judges whether the SRS resource can be allocated to the UE in the time domain or not according to a preset time domain SRS resource allocation scheme, if so, allocates a corresponding time slot for the UE according to the index number of the time slot to be allocated currently obtained through calculation so as to send SRS signals; if not, judging whether SRS resources can be allocated to the UE in the frequency domain or not according to a preset frequency domain SRS resource allocation scheme, if so, allocating corresponding narrowband frequency hopping to the UE according to the index number of the narrowband frequency hopping to be allocated currently obtained through calculation so as to send SRS signals; if not, judging whether SRS resources can be allocated to the UE in the extended ZC sequence in the current period according to a preset code division SRS resource allocation scheme, if so, allocating the narrowband hopping after the corresponding ZC sequence is overlapped to the UE according to the calculated ZC sequence after the cyclic shift to be allocated and the index number of the overlapped narrowband hopping to send SRS signals.
And the time domain allocation calculation unit calculates an index number of the time slot to be allocated currently and sends the index number to the SRS resource allocation unit. Specifically, the time domain allocation calculation unit traverses the time domains of the uplink time slot and the special time slot in the current period, and calculates the index number of the time slot to be allocated currently according to the index number of the last allocated time slot and the arrangement position of the downlink time slot and the uplink time slot.
The frequency domain allocation calculation unit calculates the index number of the current narrowband hopping to be allocated and sends the index number to the SRS resource allocation unit. Specifically, the frequency domain allocation calculation unit calculates the comb density K according to the preset comb density TC And calculating the index number of the narrowband hopping to be allocated currently according to the initial hopping position of the current period and the index number of the last allocated narrowband hopping.
And the cyclic shift calculating unit calculates the ZC sequence after cyclic shift and sends the ZC sequence to the SRS resource allocation unit. Specifically, the cyclic shift calculation unit includes a phase shifted according to the frequency domainAnd calculating the index numbers of the current cyclic shifted ZC sequence to be allocated and the superimposed narrowband frequency hopping, wherein the cyclic shift parameter->。
In summary, the method can allocate SRS resources to the UE in a mode of expanding ZC sequences in time domain and frequency domain, and can utilize the existing resources to the greatest extent and support the greatest UE access number.
The foregoing examples only illustrate preferred embodiments of the application, which are described in more detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that modifications and improvements can be made without departing from the spirit of the application, such as combining different features of the various embodiments, which are all within the scope of the application.

Claims (8)

1. The SRS resource allocation method based on the multiple users for the 5G small cell equipment is characterized by comprising the following steps:
s1, judging whether SRS resources can be allocated to the UE in a time domain or not in a current period according to a preset time domain SRS resource allocation scheme, if so, calculating to obtain an index number of a time slot to be allocated currently, and allocating a corresponding time slot to the UE to send SRS signals; if not, executing the step S2; the calculating to obtain the index number of the current time slot to be allocated includes: traversing the time domain of the uplink time slot and the special time slot in the current period, and calculating the index number of the time slot to be allocated currently according to the index number of the last allocated time slot and the arrangement position of the downlink time slot and the uplink time slot and the special time slot;
s2, judging whether SRS resources can be allocated to the UE in the frequency domain or not in the current period according to a preset frequency domain SRS resource allocation scheme, if so, calculating to obtain an index number of the current narrowband hopping to be allocated, and allocating corresponding narrowband hopping to the UE to send SRS signals; if not, executing the step S3; the calculating to obtain the index number of the narrowband hopping to be allocated currently comprises the following steps: according to a preset comb density K TC The initial frequency hopping position of the current period and the index number of the last allocated narrowband frequency hopping calculate the index number of the narrowband frequency hopping to be allocated currently;
s3, judging whether the SRS resource can be allocated to the UE in the extended ZC sequence or not in the current period according to a preset code division SRS resource allocation scheme, and if soIf yes, calculating to obtain the current cyclic shifted ZC sequence to be allocated and the index number of the superimposed narrowband frequency hopping, and allocating the narrowband frequency hopping after the corresponding ZC sequence is superimposed to the UE to send SRS signals; the calculating to obtain the index number of the cyclic shifted ZC sequence to be allocated and the superimposed narrowband frequency hopping comprises the following steps: phase according to frequency domain cyclic shiftAnd calculating index numbers of the current cyclic shifted ZC sequence to be allocated and the superimposed narrowband frequency hopping, wherein the cyclic shift parameter is calculated by the index numbers of the last allocated cyclic shifted ZC sequence and the superimposed narrowband frequency hopping
2. The method for allocating SRS resources based on multiple users in the 5G small cell device according to claim 1, wherein the preset time domain SRS resource allocation scheme includes: all uplink time slots and special time slots in one period are configured based on the 5G TS 38.211 protocol to be distributed to the UE so as to send SRS signals, wherein the distribution sequence starts from the first uplink time slot or the first special time slot arranged at the forefront;
the preset frequency domain SRS resource allocation scheme comprises the following steps: configuring narrowband hopping of all uplink time slots and special time slots in one period based on a 5G TS 38.211 protocol to allocate the narrowband hopping to the UE to send SRS signals, wherein the allocation sequence starts from the first narrowband hopping of the first uplink time slot or the first narrowband hopping of the first special time slot;
the preset code division SRS resource allocation scheme comprises the following steps: the narrowband hopping of the overlapped ZC sequences of all uplink time slots and special time slots in one period is configured based on the 5G TS 38.211 protocol to be distributed to the UE to send SRS signals, and the distribution sequence starts from the narrowband hopping of the first overlapped ZC sequence of the first uplink time slot or the narrowband hopping of the first overlapped ZC sequence of the first special time slot.
3. The SRS resource allocation method according to claim 2 wherein the one period includes at least two uplink slots and one special slot.
4. The method for allocating SRS resources based on multiple users in the 5G small cell device according to claim 3, wherein the preset time domain SRS resource allocation scheme includes: the uplink time slot and the special time slot can be respectively allocated to one UE to transmit SRS signals;
the preset frequency domain SRS resource allocation scheme comprises the following steps: the uplink time slot and the special time slot respectively comprise at most 24 narrowband frequency hopping, and each narrowband frequency hopping can be allocated to one UE to transmit SRS signals;
the preset code division SRS resource allocation scheme comprises the following steps: the uplink time slot and the special time slot respectively comprise at most 24 narrowband hopping frequencies, each narrowband hopping frequency can be overlapped with at most 12 ZC sequences, and each narrowband hopping frequency overlapped with one ZC sequence can be distributed to one UE to transmit SRS signals.
5. The SRS resource allocation device based on the multiple users of the 5G small base station equipment is characterized by comprising an SRS resource pre-allocation unit, an SRS resource allocation unit, a time domain allocation calculation unit, a frequency domain allocation calculation unit and a cyclic shift calculation unit;
the SRS resource pre-configuration unit pre-configures a time domain SRS resource configuration scheme, a frequency domain SRS resource configuration scheme and a code division SRS resource configuration scheme;
the SRS resource allocation unit judges whether the SRS resource can be allocated to the UE in the time domain according to a preset time domain SRS resource allocation scheme, if so, allocates a corresponding time slot to the UE according to the calculated index number of the current time slot to be allocated so as to send SRS signals; if not, judging whether SRS resources can be allocated to the UE in the frequency domain or not according to a preset frequency domain SRS resource allocation scheme, if so, allocating corresponding narrowband frequency hopping to the UE according to the calculated index number of the narrowband frequency hopping to be allocated currently so as to send SRS signals; if not, judging whether SRS resources can be allocated to the UE in the extended ZC sequence in the current period according to a preset code division SRS resource allocation scheme, if so, allocating the narrowband hopping after overlapping the corresponding ZC sequence to the UE according to the calculated cyclic shifted ZC sequence to be allocated and the index number of the overlapped narrowband hopping to send SRS signals;
the time domain allocation calculation unit calculates an index number of a current time slot to be allocated and sends the index number to the SRS resource allocation unit;
the frequency domain allocation calculation unit calculates an index number of the current narrowband hopping to be allocated and sends the index number to the SRS resource allocation unit;
the cyclic shift calculating unit calculates a ZC sequence after cyclic shift to be allocated currently and sends the ZC sequence to the SRS resource allocating unit;
the time domain allocation calculation unit further includes: traversing the time domain of the uplink time slot and the special time slot in the current period, and calculating the index number of the time slot to be allocated currently according to the index number of the last allocated time slot and the arrangement position of the downlink time slot and the uplink time slot and the special time slot;
the frequency domain allocation calculation unit further includes: according to a preset comb density K TC The initial frequency hopping position of the current period and the index number of the last allocated narrowband frequency hopping calculate the index number of the narrowband frequency hopping to be allocated currently;
the cyclic shift calculation unit further includes: phase according to frequency domain cyclic shiftAnd calculating the index numbers of the ZC sequence after the cyclic shift and the superimposed narrowband frequency hopping to be allocated currently, wherein the cyclic shift parameter +.>
6. The apparatus for multiuser-based SRS resource allocation for a 5G small cell device according to claim 5, wherein the SRS resource pre-allocation unit further comprises: all uplink time slots and special time slots in one period are configured based on the 5G TS 38.211 protocol to be distributed to the UE so as to send SRS signals, wherein the distribution sequence starts from the first uplink time slot or the first special time slot arranged at the forefront; configuring narrowband hopping of all uplink time slots and special time slots in one period based on a 5G TS 38.211 protocol to allocate the narrowband hopping to the UE to send SRS signals, wherein the allocation sequence starts from the first narrowband hopping of the first uplink time slot or the first narrowband hopping of the first special time slot; and configuring narrowband hopping frequencies of the overlapped ZC sequences of all uplink time slots and special time slots in one period based on the 5G TS 38.211 protocol to be distributed to the UE to transmit SRS signals, wherein the distribution sequence starts from the narrowband hopping frequency of the first overlapped ZC sequence of the first uplink time slot or the narrowband hopping frequency of the first overlapped ZC sequence of the first special time slot.
7. The SRS resource allocation apparatus based on multiple users for a 5G small cell device according to claim 6, wherein the one period includes at least two uplink slots and one special slot.
8. The apparatus for multiuser-based SRS resource allocation for a 5G small cell device according to claim 7, wherein the preset time domain SRS resource allocation scheme comprises: the uplink time slot and the special time slot can be respectively allocated to one UE to transmit SRS signals;
the preset frequency domain SRS resource allocation scheme comprises the following steps: the uplink time slot and the special time slot respectively comprise at most 24 narrowband frequency hopping, and each narrowband frequency hopping can be allocated to one UE to transmit SRS signals;
the preset code division SRS resource allocation scheme comprises the following steps: the uplink time slot and the special time slot respectively comprise at most 24 narrowband hopping frequencies, each narrowband hopping frequency can be overlapped with at most 12 ZC sequences, and each narrowband hopping frequency overlapped with one ZC sequence can be distributed to one UE to transmit SRS signals.
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WO2011157042A1 (en) * 2010-06-13 2011-12-22 中兴通讯股份有限公司 Multi-antenna transmitting method for sounding reference signal, terminal and base station thereof
CN102761968A (en) * 2011-04-27 2012-10-31 艾利森电话股份有限公司 Method for allocating uplink resource of SRS (Sounding Reference Signal) of multi-user equipment and base station
CN115883290A (en) * 2021-09-30 2023-03-31 华为技术有限公司 Communication method and device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011157042A1 (en) * 2010-06-13 2011-12-22 中兴通讯股份有限公司 Multi-antenna transmitting method for sounding reference signal, terminal and base station thereof
CN102761968A (en) * 2011-04-27 2012-10-31 艾利森电话股份有限公司 Method for allocating uplink resource of SRS (Sounding Reference Signal) of multi-user equipment and base station
CN115883290A (en) * 2021-09-30 2023-03-31 华为技术有限公司 Communication method and device

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