CN116321439A

CN116321439A - Method, device, base station equipment and storage medium for avoiding inter-cell interference

Info

Publication number: CN116321439A
Application number: CN202111552755.9A
Authority: CN
Inventors: 吕腾蛟; 马宏武; 孙益禄
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2023-06-23

Abstract

The embodiment of the application provides a method, a device, base station equipment and a storage medium for avoiding inter-cell interference, wherein the method comprises the following steps: and modifying the positions of the synchronous signals and the physical broadcast channel blocks SSB sent by the cells in the group in the time domain according to the remainder of the physical cell identification PCI module 3 of the cells in the group, wherein the positions of the SSBs sent by the cells with different remainder of the PCI module 3 in the time domain are different. According to the method and the device, the positions of SSBs (subscriber identity module) sent by the cells in the group in the time domain are set according to the remainder of the PCI (physical cell identifier) module 3 of the cells in the group, so that the SSBs sent by the cells in the same group occupy different positions in the time domain, interference of SSBs of adjacent cells is reduced, and the values of synchronous signal-to-noise ratio and interference ratio are improved.

Description

Method, device, base station equipment and storage medium for avoiding inter-cell interference

Technical Field

The present disclosure relates to the field of wireless communications technologies, and in particular, to a method, an apparatus, a base station device, and a storage medium for avoiding inter-cell interference.

Background

In order to improve the spectrum efficiency, the communication system may employ the same-frequency networking, that is, adjacent cells use the same center frequency point, however, the risk of the same-frequency interference between adjacent cells under the same-frequency networking increases along with the same-frequency interference, and user equipment located in an inter-cell edge zone and a signal overlapping coverage area of a plurality of cells may be subjected to serious same-frequency interference.

In particular, during a cell search in which a user equipment performs time and frequency synchronization using a cell synchronization signal, which is called SSB (Synchronization Signal and Physical Broadcast Channel block, synchronization signal and PBCH block) in a 5G (5 th Generation Mobile Communication Technology, fifth generation mobile communication technology) network, the SSB includes PSS (Primary Synchroniztion Singnal, primary synchronization signal), SSS (Secondary Synchroniztion Singnal, secondary synchronization signal) and PBCH (Physical Broadcast Channel ), interference of a neighbor cell synchronization signal may occur.

There is therefore a need for some optimization of the communication system in order to avoid SSB interference between neighboring cells.

Disclosure of Invention

The embodiment of the application provides a method, a device, base station equipment and a storage medium for avoiding inter-cell interference, which are used for solving the defect that in the prior art, SSB transmitted by adjacent cells is in the same position in a time domain, so that when the cells have overlapping coverage, SSB interference can occur among the cells, and avoiding inter-cell SSB interference is realized.

In a first aspect, an embodiment of the present application provides a method for avoiding inter-cell interference, including: and modifying the positions of the synchronous signals and the physical broadcast channel blocks SSB sent by the cells in the group in the time domain according to the remainder of the physical cell identification PCI module 3 of the cells in the group, wherein the positions of the SSBs sent by the cells with different remainder of the PCI module 3 in the time domain are different.

Optionally, according to a method for avoiding inter-cell interference in one embodiment of the present application, the modifying, according to a remainder of PCI modulo 3 of a cell in a small group, a location in a time domain of SSB sent by the cell in the small group includes:

dividing the cells in a group into a first cell, a second cell and a third cell according to the remainder of PCI module 3 of the cells in the group;

the position of the SSB transmitted by the first cell in the time domain is set as a first SSB position in a first time slot, the position of the SSB transmitted by the second cell in the time domain is set as a second SSB position in the first time slot, and the position of the SSB transmitted by the third cell in the time domain is set as a first SSB position in the second time slot.

Optionally, a method for avoiding inter-cell interference according to an embodiment of the present application further includes:

detecting whether a measurement report MR is received within a first preset time;

under the condition that the MR is received in a first preset time, judging whether the absolute value of the difference between the synchronous signal reference signal receiving power SS-RSRP of the serving cell and the SS-RSRP of the neighbor cell in the MR is smaller than an entering SS-SINR optimizing switch threshold or not, and whether the SSB sent by the serving cell and the neighbor cell are in different time slots in a time domain or not;

And under the condition that the absolute value of the difference of the SS-RSRP is smaller than the threshold of the entering SS-SINR optimization switch and the SSB sent by the serving cell and the neighbor cell are in different time slots in the time domain, the media intervention control layer MAC of the serving cell does not schedule the resource block RB corresponding to the SSB in the time slot where the SSB sent by the neighbor cell is located.

Optionally, according to a method for avoiding inter-cell interference according to an embodiment of the present application, the MAC of the serving cell no longer schedules a resource block RB corresponding to an SSB in a slot where the SSB sent by the neighboring cell is located, where the resource block RB includes:

under the condition that the serving cell occupies the first cell or the second cell, the MAC of the first cell or the second cell does not schedule the RB corresponding to the SSB of the second time slot any more;

or, in the case that the serving cell occupies the third cell, the MAC of the third cell no longer schedules the RB corresponding to the SSB of the first slot.

under the condition that the MR is not received in the first preset time, detecting whether the ratio SlotNackCount of negative response times in downlink per time slot of a time slot where the SSB sent by the adjacent cell is positioned is stable at a preset threshold and lasts for a second preset time;

Under the condition that SlotNackCount is stabilized at a preset threshold and lasts for a second preset time, the MAC of the service cell does not schedule the RB corresponding to the SSB in the time slot where the SSB sent by the adjacent cell is located; wherein SSBs transmitted by the serving cell and the neighboring cell are in different time slots in the time domain.

Optionally, according to a method for avoiding inter-cell interference in an embodiment of the present application, the RB corresponding to the SSB in the slot where the MAC of the serving cell no longer schedules the SSB sent by the neighboring cell includes:

Optionally, according to a method for avoiding inter-cell interference according to an embodiment of the present application, the first preset time is 6 seconds.

Optionally, according to a method for avoiding inter-cell interference according to an embodiment of the present application, the threshold of the incoming SS-SINR optimization switch is 10dB.

Optionally, according to a method for avoiding inter-cell interference according to an embodiment of the present application, the preset threshold is 5%.

In a second aspect, embodiments of the present application further provide a base station apparatus, including a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

and modifying the positions of the synchronous signals and the physical broadcast channel blocks SSB sent by the cells in the group in the time domain according to the remainder of the physical cell identification PCI module 3 of the cells in the group, wherein the positions of the SSBs sent by the cells with different remainder of the PCI module 3 in the time domain are different.

Optionally, according to the base station apparatus of one embodiment of the present application, the modifying, according to the remainder of PCI modulo 3 of the intra-group cell, the location of SSB sent by the intra-group cell in the time domain includes:

Optionally, the base station apparatus according to one embodiment of the present application, the operations further include:

Optionally, according to the base station device of one embodiment of the present application, the resource block RB corresponding to the SSB in the timeslot where the MAC of the serving cell does not schedule the SSB sent by the neighbor cell any more includes:

Optionally, according to the base station apparatus of one embodiment of the present application, the RB corresponding to the SSB in the slot where the MAC of the serving cell no longer schedules the SSB sent by the neighboring cell includes:

Optionally, according to a base station apparatus of one embodiment of the present application, the first preset time is 6 seconds.

Optionally, according to an embodiment of the present application, the threshold of the incoming SS-SINR optimization switch is 10dB.

Optionally, according to an embodiment of the present application, the preset threshold is 5%.

In a third aspect, an embodiment of the present application further provides an apparatus for avoiding inter-cell interference, including:

and the SS-SINR optimizing unit is used for modifying the positions of the synchronous signals and the physical broadcast channel blocks SSB transmitted by the cells in the group in the time domain according to the remainder of the physical cell identification PCI modulo 3 of the cells in the group, wherein the positions of the SSB transmitted by the cells with different remainder of the PCI modulo 3 in the time domain are different.

In a fourth aspect, embodiments of the present application further provide a processor-readable storage medium storing a computer program for causing the processor to perform the steps of the method for avoiding inter-cell interference as described in the first aspect.

According to the method, the device, the base station equipment and the storage medium for avoiding inter-cell interference, the positions of SSBs (subscriber identity module) sent by cells in a small group in a time domain are set according to the remainder of the PCI (peripheral component interconnect) module 3 of the physical cell identification of the cells in the small group, so that SSBs sent by all cells in the same small group occupy different positions in the time domain, interference of SSBs in adjacent cells is reduced, and the values of synchronous signal to noise ratio and interference ratio are improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of SSB distribution of adjacent cells in the time-frequency domain in the prior art;

fig. 2 is a schematic flow chart of a method for avoiding inter-cell interference according to an embodiment of the present application;

fig. 3 is a second flowchart of a method for avoiding inter-cell interference according to an embodiment of the present disclosure;

Fig. 4 is a schematic diagram of SSB distribution of adjacent cells in a time-frequency domain according to an embodiment of the present application;

fig. 5 is a third flowchart of a method for avoiding inter-cell interference according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of an apparatus for avoiding inter-cell interference according to an embodiment of the present application.

Detailed Description

In the embodiment of the application, the term "and/or" describes the association relationship of the association objects, which means that three relationships may exist, for example, a and/or B may be represented: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The term "plurality" in the embodiments of the present application means two or more, and other adjectives are similar thereto.

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The technical scheme provided by the embodiment of the application can be suitable for various systems, in particular to a 5G system. For example, suitable systems may be global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet Radio service (general packet Radio service, GPRS), long term evolution (long term evolution, LTE), LTE frequency division duplex (frequency division duplex, FDD), LTE time division duplex (time division duplex, TDD), long term evolution-advanced (long term evolution advanced, LTE-a), universal mobile system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX), 5G New air interface (New Radio, NR), and the like. Terminal devices and network devices are included in these various systems. Core network parts such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS) etc. may also be included in the system.

The terminal device according to the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem, etc. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal devices may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless terminal device may also be referred to as a system, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile), remote station (remote station), access point (access point), remote terminal device (remote terminal), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), user equipment (user device), and the embodiments of the present application are not limited.

The network device according to the embodiment of the present application may be a base station, where the base station may include a plurality of cells for providing services for a terminal. A base station may also be called an access point or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or other names, depending on the particular application. The network device may be operable to exchange received air frames with internet protocol (Internet Protocol, IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile communications, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a network device (NodeB) in a wideband code division multiple access (Wide-band Code Division Multiple Access, WCDMA), an evolved network device (evolutional Node B, eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in a 5G network architecture (next generation system), a home evolved base station (Home evolved Node B, heNB), a relay node (relay node), a home base station (femto), a pico base station (pico), and the like. In some network structures, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

Multiple-input Multiple-output (Multi Input Multi Output, MIMO) transmissions may each be made between a network device and a terminal device using one or more antennas, and the MIMO transmissions may be Single User MIMO (SU-MIMO) or Multiple User MIMO (MU-MIMO). The MIMO transmission may be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or may be diversity transmission, precoding transmission, beamforming transmission, or the like, depending on the form and number of the root antenna combinations.

The embodiment of the application provides a method and a device for avoiding inter-cell interference, which are used for setting the positions of SSBs (subscriber identity module) sent by cells in a group in a time domain according to the remainder of PCI (physical cell identifier) module 3 of the cells in the group, so that the SSBs sent by each cell in the same group occupy different positions in the time domain, thereby reducing the interference of SSBs of neighboring cells and improving the values of synchronous signal to noise ratio and interference ratio.

PCI (Physical Cell Identifier, physical cell identity) is a number between 0-503 that the system configures for a cell to distinguish between radio signals of different cells. The remainder of the PCI modulo 3 is a remainder value obtained by taking the PCI modulo 3, the PCI modulo 3 value determines the positions of the primary synchronization signal and the pilot signal (Cell Reference Signal, CRS), and if the PCI modulo 3 value is the same in the adjacent cells, the primary synchronization signal of the adjacent cells is the same and overlaps with the reference signal position, so that the remainder of the PCI modulo 3 of the adjacent cells is different in the PCI planning, and the remainder of the PCI modulo 3 of each cell in the same group is different.

The method and the device are based on the same application, and because the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated.

Fig. 1 is a schematic diagram of SSB distribution of adjacent cells in the time-frequency domain, and as shown in fig. 1, SSB occupies 4 symbols in the time domain, occupies 20 RBs (resource blocks) in the frequency domain, and each RB is 12 subcarriers in the frequency domain. In a 5G network, the time domain position of the SSB is classified into different cases in 5 according to the difference of subcarrier intervals, here taking case a (case a) used by FDD (Frequency Division Duplexing, frequency division duplex) as an example, where the subcarrier interval of the SSB is 15khz, the position where the first symbol of the SSB is located is {2,8} +14×n, where when the carrier frequency is less than 3GHz, n=0, 1, so each slot (slot) has two SSB candidate positions, and the fixed starting positions are symbol 2 and symbol 8, and there are four SSB candidate positions in the two slots (slot 0 and slot 1), which can be marked as SSB0 position, SSB1 position, SSB2 position and SSB3 position.

In LTE (Long Term Evolution ) network planning, in order to avoid "modulo-3 interference", the remainder of the PCI (Physical Cell Identifier, physical cell identity) modulo-3 of the neighboring cells is different, and the remainder is 0, 1, 2, respectively. In the prior art, SSBs of neighboring cells with different PCI modulo 3 remainder are transmitted at the same location, e.g. all occupy SSB0 location, when the signal ranges of neighboring cells overlap to cover certain areas, i.e. when the areas can search for signals of multiple cells at the same time, larger SSB interference occurs in these areas, and SS-SINR (Synchronization signal-to-noise and interference ratio, synchronous signal to noise ratio and interference ratio) is significantly reduced, which affects user perception QoE (Quality of Experience ).

Fig. 2 is a flow chart of a method for avoiding inter-cell interference according to an embodiment of the present application, as shown in fig. 2, an embodiment of the present application provides a method for avoiding inter-cell interference, where an execution body of the method may be a base station, for example, a 5G base station. The method comprises the following steps:

and 110, modifying the positions of the synchronous signals and the physical broadcast channel blocks SSB sent by the cells in the group in the time domain according to the remainder of the physical cell identification PCI module 3 of the cells in the group, wherein the positions of the SSBs sent by the cells with different remainder of the PCI module 3 in the time domain are different.

Specifically, the positions of the SSBs sent by the cells in the group in the time domain are set according to the remainder of the PCI module 3 of the physical cell identification of the cells in the group, so that the positions of the SSBs sent by the cells in the same group in the time domain are staggered, and the mutual interference of the SSBs between the cells is avoided.

Fig. 3 is one of the flow diagrams of the method for avoiding inter-cell interference according to the embodiment of the present application, as shown in fig. 3, where modifying, according to the remainder of PCI modulo 3 of a cell in a group, the location in time domain of SSB sent by the cell in the group includes:

and 111, dividing the cells in the small group into a first cell, a second cell and a third cell according to the remainder of the physical cell identification PCI module 3 of the cells in the small group.

Specifically, in this embodiment of the present application, the base station first divides the cells in the same group into the first cell, the second cell and the third cell according to the remainder of the physical cell identifier PCI modulo 3 of the cells in the group, where each cell has a PCI and the remainder of the PCI modulo 3 is different, for example, the remainder of the PCI modulo 3 of the first cell is 0, the remainder of the PCI modulo 3 of the second cell is 1, the remainder of the PCI modulo 3 of the third cell is 2, or other correspondence may be possible, for example, the remainder of the PCI modulo 3 of the first cell is 1, the remainder of the PCI modulo 3 of the second cell is 2, the remainder of the PCI modulo 3 of the third cell is 0, or the like.

Step 112, setting the position of the SSB sent by the first cell in the time domain as the first SSB position in the first time slot, setting the position of the SSB sent by the second cell in the time domain as the second SSB position in the first time slot, and setting the position of the SSB sent by the third cell in the time domain as the first SSB position in the second time slot.

Specifically, in the embodiment of the present application, the base station directly correlates the location of the SSB sent by the cell with the PCI of the cell, and sets the location of the SSB sent by the cell in the time domain according to the remainder of the physical cell identifier PCI modulo 3 of the cell in the cell. Corresponding to case A, there are four SSB candidate positions in two time slots (slot 0 and slot 1), the four SSB candidate positions are distributed to three cells, the SSB transmitted by each cell occupies different SSB candidate positions, theoretically there are four corresponding setting methods, there are always SSB transmitted by two cells in the same time slot, and SSB transmitted by another cell in another time slot.

Fig. 4 is a schematic diagram of distribution of SSBs of neighboring cells in a time-frequency domain, where as shown in fig. 4, the SSB sent by a cell with a remainder of 0 in PCI mode 3 is set to be at an SSB0 position in the time domain, the SSB sent by a cell with a remainder of 1 in PCI mode 3 is set to be at an SSB1 position in the time domain, and the SSB sent by a cell with a remainder of 2 in PCI mode 3 is set to be at an SSB2 position in the time domain, where the SSB0 position and the SSB1 position are within slot0, and the SSB2 position is within slot 1.

Of course, there may be other correspondence, for example, the SSB transmitted by the cell with the remainder of 1 in the PCI mode 3 is set to the SSB0 position in the time domain, the SSB transmitted by the cell with the remainder of 2 in the PCI mode 3 is set to the SSB1 position in the time domain, the SSB transmitted by the cell with the remainder of 0 in the PCI mode 3 is set to the SSB2 position in the time domain, and so on.

According to the method for avoiding inter-cell interference, the positions of SSBs sent by the cells in the group in the time domain are set according to the remainder of the PCI module 3 of the physical cell identification of the cells in the group, so that the SSBs sent by the cells in the same group occupy different positions in the time domain, interference of SSBs in adjacent cells is reduced, and the values of synchronous signal-to-noise ratio and interference ratio are improved.

Optionally, detecting whether an MR (measurement Report) is received within a first preset time;

in the case that the absolute value of the difference between SS-RSRP is smaller than the threshold of the incoming SS-SINR optimization switch, and the SSB transmitted by the serving cell and the neighbor cell are in different time slots in the time domain, the MAC (Media Access Control, media intervention control layer) of the serving cell no longer schedules the resource block RB corresponding to the SSB in the time slot in which the SSB transmitted by the neighbor cell is located.

Optionally, the resource block RB corresponding to the SSB in the timeslot where the MAC of the serving cell does not schedule the SSB sent by the neighboring cell any more includes:

Optionally, the first preset time is 6 seconds; the threshold of the incoming SS-SINR optimization switch is 10dB.

Specifically, two parameters are added: detect MR timer (unit: seconds) and enter SS-SINR optimized switch threshold (unit: dB). The parameter "detect MR timer" is compared with the normal reporting MR time of the base station, and the parameter value is set to 6 seconds, and is mainly related to the reporting period of the measurement report MR, so that it is required to detect whether the MR is received in at least one complete MR reporting period, and thus, in an embodiment, if the MR reporting period is 5.12 seconds, the preset time of the MR timer may be set to 6 seconds. The parameters may be adjusted in real time, i.e., in some embodiments, other time intervals than 6 seconds may be selected as needed or configured to accurately and efficiently detect MR reports. The parameter "enter the SS-SINR optimizing switch threshold" is used for judging whether to trigger the scheduling of avoiding the adjacent cell interference, and is judged to trigger the scheduling of avoiding the adjacent cell interference under the condition that the parameter is smaller than the "enter the SS-SINR optimizing switch threshold", the proposal is set to be 10dB, the parameter value is used for judging the influence of the adjacent cell on the SSB SNIR of the local cell, when the SSB signal intensity of the adjacent cell is similar to that of the main cell, the SSB SINR of the local cell is reduced, and in one embodiment, the condition that the SSB SINR is smaller than 10dB is set, the influence of the synchronous signal reference signal receiving power of the adjacent cell on the local cell is considered to be larger, and the scheduling of avoiding the adjacent cell interference is required to be triggered. In other embodiments, other threshold values than 10dB may be selected as desired or configured.

Under the condition that the MR reported by the terminal equipment UE is detected in the MR timer, judging whether the absolute value of the difference between the SS-RSRP of the serving Cell and the SS-RSRP of the Neighbor Cell is smaller than a parameter 'entering an SS-SINR optimization switch threshold', if so, the MAC layer of the serving Cell does not schedule Resource Blocks (RBs) corresponding to SSB in the time slot where the SSB sent by the Neighbor Cell is located any more, wherein the SSB sent by the serving Cell and the Neighbor Cell are in different time slots in the time domain according to the SS-RSRP (Synchronization Signal Reference Signal Received Power) of the serving Cell and the SS-RSRP of the strongest Neighbor Cell in the MR. If the SSB is greater than the 'enter SS-SINR optimized switch threshold' or the SSB sent by the serving cell and the neighbor cell are in the same time slot in the time domain, normal scheduling is performed. For example, when the serving cell is the first cell or the second cell and the SS-RSRP of the neighboring cell in the MR is the third cell, it is determined whether the absolute value of the difference between the SS-RSRP of the serving cell and the SS-RSRP of the neighboring cell is smaller than the parameter "enter SS-SINR optimization switch threshold", if smaller than "enter SS-SINR optimization switch threshold", the MAC layer of the first cell or the second cell does not schedule 20 RBs corresponding to the SSB of the second slot any more, and if greater than "enter SS-SINR optimization switch threshold", normal scheduling is performed. Of course, there may be other situations, for example, when the serving cell is the third cell and the SS-RSRP of the neighboring cell in the MR is the first cell or the second cell, it is determined whether the absolute value of the difference between the SS-RSRP of the serving cell and the SS-RSRP of the neighboring cell is smaller than the parameter "enter SS-SINR optimization switch threshold", if smaller than "enter SS-SINR optimization switch threshold", the MAC layer of the third cell does not schedule 20 RBs corresponding to the SSB of the first time slot any more, and if greater than "enter SS-SINR optimization switch threshold", normal scheduling is performed.

According to the method for avoiding inter-cell interference, whether the scheduling for avoiding adjacent cell interference is triggered or not is detected, and the call of the cell to the RB corresponding to the SSB is adjusted under the condition that the scheduling for avoiding adjacent cell interference is triggered, so that interference of the adjacent cell SSB to the PDSCH (physical Downink Shared Channel, physical downlink shared channel) of the cell can be avoided.

Optionally, under the condition that the MR is not received in the first preset time, detecting whether the duty ratio SlotNackCount of negative response times in downlink per time slot of the time slot where the SSB sent by the adjacent cell is located is stable in a preset threshold and lasts for a second preset time;

under the condition that SlotNackCount is stabilized at a preset threshold and lasts for a second preset time, the MAC of the service cell does not schedule the RB corresponding to the SSB in the time slot where the SSB sent by the adjacent cell is located; wherein the SSB transmitted by the serving cell and the neighbor cell are in different time slots in the time domain.

Optionally, the RB corresponding to the SSB in the slot where the MAC of the serving cell no longer schedules the SSB sent by the neighboring cell includes:

Optionally, the preset threshold is 5%.

Specifically, when MR is not received within a preset time, slotNackCount is adopted for judgment, that is, judgment according to MR is mainly performed, judgment according to slotNackCount is used as an auxiliary, MR is adopted for judgment when MR reporting exists, and slotNackCount is adopted for judgment when MR reporting does not exist for a long time. The whole term of SlotNackCount is SlotNack Count, which means the ratio of Nack times in each time Slot, and Nack is negative acknowledgement. When the serving cell is the first cell or the second cell, detecting whether the downlink slotNackCount of the second time slot is stabilized at about 5% and lasting for a predetermined time, if the downlink slotNackCount is stabilized at about 5% and lasting for the predetermined time, the MAC layer of the first cell or the second cell does not schedule 20 RBs corresponding to the SSB of the second time slot any more, and if the downlink slotNackCount is not stabilized at about 5% or lasting for the predetermined time, the MAC layer is normally scheduled. Of course, there may be other situations, for example, when the serving cell is the third cell, it is detected whether the downlink slotNackCount of the first slot is stabilized at about 5% and lasts for a predetermined time, if the slotNackCount is stabilized at about 5% and lasts for a predetermined time, the MAC layer of the third cell does not schedule 20 RBs corresponding to the SSB of the first slot any more, and if the slotNackCount is not stabilized at about 5% or does not last for a predetermined time, the MAC layer of the third cell normally schedules. Since the transmission period of SSB is fixed to 20ms, the corresponding negative acknowledgement, i.e. the error duty ratio, in each time slot caused by the interference of the neighbor SSB to the PDSCH (physical Downink Shared Channel, physical downlink shared channel) is basically fixed, the period is counted down, the number of SSB transmissions within 1s is obtained to be 50, i.e. the number of SSB interference by the neighbor SSB is 50 in 1000 times, and it is known from the calculation formula 50/1000=5%, and since the slotNackCount caused by the interference of the neighbor SSB to the PDSCH of the cell is about 5%, the preset threshold is suggested to be 5%, and as the above-mentioned derivation process, the preset threshold is mainly determined by factors such as the transmission period of the neighbor SSB. In some embodiments, other threshold values may also be selected for SlotNackCount according to different configurations. .

According to the method for avoiding inter-cell interference, the judgment is mainly performed according to the MR, the judgment is performed according to the SlotNackCount, the MR is adopted for judgment when the MR is available for reporting, and the slotNackCount is adopted for judgment when the MR is not available for reporting for a long time, so that interference of the adjacent cell SSB to the PDSCH of the cell can be well avoided, different conditions can be considered, and the robustness is improved.

Fig. 5 is a third flowchart of a method for avoiding inter-cell interference according to an embodiment of the present application, and referring to fig. 5, the method for avoiding inter-cell interference according to an embodiment of the present application includes the following steps.

The parameter names mentioned in the present embodiment are used to describe the corresponding functions, and do not represent the actual parameter names that are necessarily the names mentioned in the present embodiment, and should be regarded as the same parameters when the parameters can realize the same functions.

Adding a parameter 'SS-SINR optimization switch', wherein the parameter is used for turning on or turning off a function of avoiding inter-cell interference provided by the embodiment of the application; in order to implement the method for avoiding inter-cell interference provided in the embodiments of the present application, the "SS-SINR optimization switch" function is turned on first.

Adding a parameter 'SSB sent by a cell in a group', wherein the parameter is used for modifying the position of the SSB sent by the cell in the time domain according to the remainder (0/1/2) of the module 3 of the PCI of the cell; when the value of the parameter is set as 'adaptive selection', the base station modifies the position of SSB transmitted by the cell in the time domain according to the remainder (0/1/2) of PCI modulo 3 of the cell; thus, the value of the parameter "SSB transmitted by one intra-group cell" is then set to "adaptive selection".

Specifically, the location in time of SSB0 transmitted by the cell with the remainder of 0 in PCI mode 3 is set to the first SSB0 of Slot0, the location in time of SSB transmitted by the cell with the remainder of 1 in PCI mode 3 is set to the second SSB1 of Slot0, and the location in time of SSB transmitted by the cell with the remainder of 2 in PCI mode 3 is set to the first SSB2 of Slot 1.

And a parameter 'detection MR timer' is added, wherein the parameter is used for comparing with the MR time normally reported by the base station, and whether MR is reported in the MR timer or not is detected, and the proposal is set to be 6 seconds. Next, it is detected whether MR is received within 6 seconds.

And adding a parameter 'entering an SS-SINR optimizing switch threshold', wherein the parameter is used for judging whether to trigger the scheduling for avoiding the adjacent cell interference, and the parameter is judged to trigger the scheduling for avoiding the adjacent cell interference under the condition that the parameter is smaller than the 'entering the SS-SINR optimizing switch threshold', and the proposal is set to be 10dB. In the case of MR reception within 6 seconds, the following determination is made:

for the case that the remainder of PCI modulo 3 of the serving cell is 0 or 1, the cell with the remainder of PCI modulo 3 is 0 or 1 judges whether the absolute value of the difference between the SS-RSRP of the serving cell and the SS-RSRP of the neighbor cell is smaller than the parameter 'enter SS-SINR optimizing switch threshold', and if the neighbor cell with the strongest SS-RSRP is the cell with the remainder of PCI modulo 3 being 2, if both are, the upper layer informs the MAC layer, and the MAC layer of the cell with the remainder of PCI modulo 3 being 0 or 1 does not schedule 20 RBs corresponding to SSB of Slot1 any more; otherwise, the absolute value of the difference is not smaller than the parameter 'entering the SS-SINR optimizing switch threshold' and/or the neighbor cell does not have the cell with the remainder of 2 of PCI modulo 3, and the scheduling is normal.

For the case that the remainder of PCI modulo 3 of the serving cell is 2, the cell with the remainder of PCI modulo 3 judges whether the absolute value of the difference between the SS-RSRP of the serving cell and the SS-RSRP of the neighbor cell is smaller than the parameter 'enter SS-SINR optimization switch threshold', and if the neighbor cell with the strongest SS-RSRP is the cell with the remainder of PCI modulo 3 of 0 or 1, if both are the cells, the upper layer informs the MAC layer, and the MAC layer of the cell with the remainder of PCI modulo 3 of 2 does not schedule 20 RBs corresponding to SSB of Slot0 any more; otherwise, the absolute value of the difference is not smaller than the parameter 'entering the SS-SINR optimizing switch threshold' and/or the neighbor cell does not have the cell with the remainder of PCI modulo 3 of 0 or 1, and normal scheduling is carried out.

In the case where MR is not received within 6 seconds, the following determination is made:

for the case that the remainder of the PCI modulo 3 of the service cell is 0 or 1, the cell with the remainder of the PCI modulo 3 of 0 or 1 judges whether the Slot1NackCount is stabilized to be about 5% according to the downlink Slot1NackCount of the Slot1 (the specific gravity of the sum of Nack times in the Slot 1) and lasts for a preset time, if so, the upper layer informs the MAC layer, and the MAC layer of the cell with the remainder of the PCI modulo 3 of 0 or 1 does not schedule 20 RBs corresponding to SSB of the Slot1 any more; otherwise, i.e. slot1NackCount is not stabilized around 5% and/or does not last for a predetermined time, scheduling is normal.

For the case that the remainder of the PCI modulo 3 of the serving cell is 2, the cell with the remainder of the PCI modulo 3 judges whether the Slot0NackCount is stabilized to be about 5% according to the downlink Slot0NackCount of Slot0 (the specific gravity of the sum of Nack times in Slot 0) and lasts for a preset time, if so, the upper layer informs the MAC layer, and the MAC layer of the cell with the remainder of the PCI modulo 3 of 2 does not schedule 20 RBs corresponding to SSB of Slot0 any more; otherwise, i.e. slot0NackCount is not stabilized around 5% and/or does not last for a predetermined time, scheduling is normal.

Fig. 6 is a schematic structural diagram of a network side device according to an embodiment of the present application, as shown in fig. 6, where the network side device includes a memory 620, a transceiver 600, and a processor 610, where:

a memory 620 for storing a computer program; a transceiver 600 for transceiving data under the control of the processor 610; a processor 610 for reading the computer program in the memory 620 and performing the following operations:

Specifically, the transceiver 600 is used to receive and transmit data under the control of the processor 610.

Wherein in fig. 6, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 610 and various circuits of memory represented by memory 620, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 600 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. The processor 610 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 610 in performing operations.

The processor 610 may be a central processing unit (Central Processing Unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), or the processor may employ a multi-core architecture.

It should be noted that, the above base station device provided in this embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution body is the base station device, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are omitted herein.

Fig. 7 is a schematic structural diagram of an apparatus for avoiding inter-cell interference provided in an embodiment of the present application, and referring to fig. 7, the apparatus for avoiding inter-cell interference provided in an embodiment of the present application includes:

and the SS-SINR optimizing unit 710 is configured to modify, according to the remainder of the physical cell identification PCI modulo 3 of the cells in the group, the positions in the time domain of the synchronization signal and the physical broadcast channel block SSB transmitted by the cells in the group, where the positions in the time domain of the SSBs transmitted by the cells with different remainders of the PCI modulo 3 are different.

It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

Optionally, the apparatus for avoiding inter-cell interference according to one embodiment of the present application, wherein the modifying, according to the remainder of PCI modulo 3 of the intra-cell, the location of SSB sent by the intra-cell in the time domain includes:

Optionally, an apparatus for avoiding inter-cell interference according to an embodiment of the present application is further configured to:

Optionally, according to an apparatus for avoiding inter-cell interference in one embodiment of the present application, the resource block RB corresponding to the SSB in the timeslot where the MAC of the serving cell no longer schedules the SSB sent by the neighboring cell includes:

Optionally, according to an apparatus for avoiding inter-cell interference in one embodiment of the present application, the RB corresponding to the SSB in the slot where the MAC of the serving cell no longer schedules the SSB sent by the neighboring cell includes:

Optionally, according to an apparatus for avoiding inter-cell interference according to an embodiment of the present application, the first preset time is 6 seconds.

Optionally, according to an apparatus for avoiding inter-cell interference of an embodiment of the present application, the threshold of the incoming SS-SINR optimization switch is 10dB.

Optionally, according to an apparatus for avoiding inter-cell interference according to an embodiment of the present application, the preset threshold is 5%.

It should be noted that, the above device provided in the embodiment of the present invention can implement all the method steps implemented in the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment in this embodiment are omitted.

In another aspect, embodiments of the present application further provide a processor readable storage medium storing a computer program, where the computer program is configured to cause the processor to perform the method provided in the foregoing embodiments, where the method includes: and modifying the positions of the synchronous signals and the physical broadcast channel blocks SSB sent by the cells in the group in the time domain according to the remainder of the physical cell identification PCI module 3 of the cells in the group, wherein the positions of the SSBs sent by the cells with different remainder of the PCI module 3 in the time domain are different.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution, in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), and the like.

Optionally, the modifying the location of SSBs sent by cells within a group in the time domain according to the remainder of PCI modulo 3 of the cells within the group includes:

Optionally, a processor readable storage medium according to an embodiment of the present application, the method further comprises:

Optionally, according to the processor readable storage medium of one embodiment of the present application, the MAC of the serving cell no longer schedules a resource block RB corresponding to the SSB in a slot where the SSB sent by the neighboring cell is located, where the resource block RB includes:

Optionally, according to the processor readable storage medium of one embodiment of the present application, the RB corresponding to the SSB in the slot where the MAC of the serving cell no longer schedules the SSB sent by the neighboring cell includes:

Optionally, the first preset time is 6 seconds according to a processor readable storage medium of an embodiment of the present application.

Optionally, the entering SS-SINR optimization switch threshold is 10dB according to a processor readable storage medium of an embodiment of the present application.

Optionally, the preset threshold is 5% according to a processor readable storage medium of an embodiment of the present application.

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

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable 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 processor-executable instructions may also be stored in a processor-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 processor-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 processor-executable 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.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A method for avoiding inter-cell interference, comprising:

2. The method for avoiding inter-cell interference according to claim 1, wherein said modifying the location in the time domain of SSBs transmitted by cells within a group according to the remainder of PCI modulo 3 of the cells within the group comprises:

3. The method for avoiding inter-cell interference according to claim 2, further comprising:

4. The method for avoiding inter-cell interference according to claim 3, wherein the MAC of the serving cell no longer schedules the resource block RB corresponding to the SSB in the slot in which the SSB transmitted by the neighboring cell is located, comprising:

5. A method of avoiding inter-cell interference according to claim 3, further comprising:

6. The method for avoiding inter-cell interference according to claim 5, wherein the MAC of the serving cell no longer schedules RBs corresponding to SSBs in a time slot in which SSBs transmitted by neighboring cells are located, comprising:

7. A method of avoiding inter-cell interference according to claim 3, wherein the first predetermined time is 6 seconds.

8. A method of avoiding inter-cell interference as recited in claim 3, wherein the incoming SS-SINR optimized switch threshold is 10dB.

9. The method of avoiding inter-cell interference according to claim 5, wherein the preset threshold is 5%.

10. A base station apparatus comprising a memory, a transceiver, and a processor:

11. The base station apparatus of claim 10, wherein said modifying the location in the time domain of SSBs transmitted by cells within a group based on the remainder of PCI modulo 3 for the cells within the group comprises:

12. The base station apparatus of claim 11, wherein the operations further comprise:

13. The base station apparatus of claim 12 wherein the MAC of the serving cell no longer schedules resource blocks RBs corresponding to SSBs in a time slot in which SSBs transmitted by the neighbor cell are located, comprising:

14. The base station apparatus of claim 12, wherein the operations further comprise:

15. The base station apparatus of claim 14 wherein the serving cell's MAC no longer schedules RBs corresponding to SSBs in the time slot in which SSBs transmitted by neighboring cells are located, comprising:

16. The base station apparatus of claim 12, wherein the first preset time is 6 seconds.

17. The base station apparatus of claim 12, wherein the incoming SS-SINR optimization switch threshold is 10dB.

18. The base station apparatus of claim 14, wherein the preset threshold is 5%.

19. An apparatus for avoiding inter-cell interference, comprising:

20. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to perform the method of any one of claims 1 to 9.