CN108271222B - Method and device for determining cut-in threshold - Google Patents
Method and device for determining cut-in threshold Download PDFInfo
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- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
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Abstract
The invention discloses a method and a device for determining a cut-in threshold, which are used for solving the technical problem of low success rate of SRVCC switching to a 2G/3G network in the prior art because a uniform cut-in threshold is set for each 2G/3G network. The method comprises the following steps: the method comprises the steps that a first network device obtains historical switching information of a second network device, wherein SRVCC switching can be carried out on a network provided by the second network device through the network provided by the first network device, the historical switching information comprises information for switching from the network provided by the second network device to P networks in a first preset time period, the network formats of the P networks and the network provided by the second network device are the same, and P is a positive integer; the first network device determines a first hand-in threshold when performing SRVCC handover from a network provided by the first network device to a network provided by the second network device based on the historical handover information.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for determining a hand-in threshold.
Background
Volte (voice over LTE) is a voice service based on LTE (Long Term Evolution) technology. Due to the existence of the conditions of insufficient coverage of the current LTE network and the like, during the Voice Call using the VoLTE, SRVCC (Single Radio Voice Call Continuity) switching from the LTE network to the 2G/3G network is often required, during the SRVCC switching, a UE (User Equipment) may detect the signal strengths of the current LTE network and the 2G/3G network respectively, and send the detection result to a corresponding eNB (Evolved Node B), and when the current LTE network signal strength is lower than a preset threshold and the 2G/3G network signal strength reaches a preset cut-in threshold, the eNB instructs the UE to perform SRVCC switching to the 2G/3G network.
In the prior art, a unified cut-in threshold of a 2G/3G network is generally set for each eNB when SRVCC handover is performed, however, since network environments in which each 2G/3G network is located are different, corresponding interferences may be different, and setting a unified cut-in threshold for each 2G/3G network cannot adapt to different network conditions of each 2G/3G network, which may result in a low success rate of SRVCC handover to a part of 2G/3G networks, and may not ensure continuity of a UE voice call.
Disclosure of Invention
Embodiments of the present invention provide a method and an apparatus for determining a hand-in threshold, so as to solve the technical problem in the prior art that a success rate of SRVCC handover to a 2G/3G network is low because a uniform hand-in threshold is set for each 2G/3G network.
In a first aspect, an embodiment of the present invention provides a method for determining a hand-in threshold, including:
the first network equipment obtains historical switching information of the second network equipment; the SRVCC handover can be performed to a network provided by the second network device through a network provided by the first network device, the historical handover information includes information for performing handover from the network provided by the second network device to P networks within a first predetermined period, the network formats of the P networks and the network provided by the second network device are the same, and P is a positive integer;
the first network equipment determines a first cut-in threshold when SRVCC switching is carried out from a network provided by the first network equipment to a network provided by the second network equipment based on the historical switching information; wherein the first cut-in threshold is used for indicating the lowest signal strength of the network provided by the second network device which needs to be detected when the network provided by the second network device is switched.
In a possible implementation manner, the historical handover information includes P handover thresholds of the P networks in a second predetermined time period, and the number of times of handover and the success rate of handover, where the networks provided by the second network device switch to the P networks in the second predetermined time period, respectively; the first network device determines, based on the historical handover information, a first hand-in threshold when performing SRVCC handover from a network provided by the first network device to a network provided by the second network device, and includes:
the first network equipment determines that the minimum cut-in threshold in the cut-in thresholds of the networks with the switching times not lower than the preset switching times and the switching success rate not lower than the first preset switching success rate in the P networks is a candidate cut-in threshold of the network provided by the second network equipment;
the first network device determines the first hand-in threshold based on the candidate hand-in threshold.
In one possible implementation, the determining, by the first network device, the first hand-in threshold based on the candidate hand-in threshold includes:
the first network device determines that the candidate hand-in threshold is the first hand-in threshold; or
The first network equipment determines that the minimum cut-in threshold in M candidate cut-in thresholds is the first cut-in threshold; the network provided by the first network equipment is provided with M networks capable of carrying out SRVCC handover, the M networks capable of carrying out SRVCC handover are provided with corresponding M candidate cut-in thresholds, and M is a positive integer.
In one possible implementation manner, after the first network device determines, based on the historical handover information, a first cut-in threshold for SRVCC handover from the network provided by the first network device to the network provided by the second network device, the method further includes:
the first network device determines whether a network provided by the second network device meets a first predetermined condition, or the first network device determines whether at least one network of the M networks capable of performing SRVCC handover meets the first predetermined condition;
if so, the first network equipment adjusts the first cut-in threshold to obtain an adjusted first cut-in threshold;
and the first network equipment determines the adjusted first cut-in threshold as a cut-in threshold when SRVCC switching is carried out from the network provided by the first network equipment to the network provided by the second network equipment.
In a possible implementation manner, the first predetermined condition includes that a handover success rate of SRVCC handover performed by a network provided by the first network device to a network provided by the second network device within a third predetermined time period is lower than a second predetermined handover success rate; the first network device adjusting the first hand-in threshold to obtain an adjusted first hand-in threshold, including:
the first network device determines an adjustment value ΔT；
The first network device determines the first hand-in threshold and deltaTThe sum is the adjusted first cut-in threshold;
wherein, DeltaTObtained based on the following formula:
Lia handover success rate, T, for SRVCC handover of the network provided for the first network device to the network provided for the second network device within the third predetermined time periodLFor a predetermined minimum handover success rate, THFor the second predetermined handover success rate, β is a predetermined proportional value.
In a possible implementation manner, the first predetermined condition includes that a promotion value of a handover success rate for the network provided by the second network device to respectively handover to the P networks is greater than a predetermined promotion value; the first network device adjusting the first hand-in threshold to obtain an adjusted first hand-in threshold, including:
the first network device lowering the first hand-in threshold by a predetermined adjustment value;
and the first network equipment determines that the first cut-in threshold reduced by the preset adjusting value is the adjusted first cut-in threshold.
In one possible implementation, the method further includes:
the first network equipment determines that the signal strength of a network provided by the first network equipment detected by user equipment at a first moment is lower than a preset signal strength;
the first network equipment determines that the signal strength of the network provided by the second network equipment detected by the user equipment at the first moment reaches a cut-in threshold when SRVCC handover is carried out from the network provided by the first network equipment to the network provided by the second network equipment;
the first network equipment sends a switching instruction to the user equipment, wherein the switching instruction is used for indicating the user equipment to carry out SRVCC switching from the network provided by the first network equipment to the network provided by the second network equipment.
In a second aspect, an embodiment of the present invention provides an apparatus for determining a hand-in threshold, including:
a first obtaining module, configured to obtain historical handover information of a second network device; the device can perform Single Radio Voice Call Continuity (SRVCC) handover to a network provided by the second network equipment through the network provided by the device, the historical handover information includes information for performing handover from the network provided by the second network equipment to P networks within a first preset time period, the network formats of the P networks are the same as those of the network provided by the second network equipment, and P is a positive integer;
a first determining module, configured to determine, based on the historical handover information, a first hand-in threshold when performing SRVCC handover from a network provided by the apparatus to a network provided by the second network device; wherein the first cut-in threshold is used for indicating the lowest signal strength of the network provided by the second network device which needs to be detected when the network provided by the second network device is switched.
In a possible implementation manner, the historical handover information includes P handover thresholds of the P networks in a second predetermined time period, and the number of times of handover and the success rate of handover, where the networks provided by the second network device switch to the P networks in the second predetermined time period, respectively; the first determination module is to:
determining that the minimum cut-in threshold in the cut-in thresholds of the networks of which the switching times are not lower than the preset switching times and the switching success rate is not lower than the first preset switching success rate in the P networks is a candidate cut-in threshold of the network provided by the second network equipment;
determining the first hand-in threshold based on the candidate hand-in threshold.
In one possible implementation manner, the first determining module is configured to:
determining the candidate cut-in threshold as the first cut-in threshold; or
Determining a minimum cut-in threshold of the M candidate cut-in thresholds as the first cut-in threshold; the network provided by the device is provided with M networks capable of carrying out SRVCC switching, wherein the M networks capable of carrying out SRVCC switching are provided with corresponding M candidate cut-in thresholds, and M is a positive integer.
In one possible implementation, the apparatus further includes:
a second determining module, configured to determine whether the network provided by the second network device meets a first predetermined condition or whether at least one of the M networks capable of performing SRVCC handover meets the first predetermined condition after the first determining module determines, based on the historical handover information, a first handover threshold at the time of performing SRVCC handover from the network provided by the apparatus to the network provided by the second network device;
the adjusting module is used for adjusting the first cut-in threshold if the first cut-in threshold is met so as to obtain an adjusted first cut-in threshold;
a third determining module, configured to determine that the adjusted first hand-in threshold is a hand-in threshold when SRVCC handover is performed from a network provided by the apparatus to a network provided by the second network device.
In a possible implementation manner, the first predetermined condition includes that a handover success rate of SRVCC handover performed by the network provided by the apparatus to the network provided by the second network device within a third predetermined time period is lower than a second predetermined handover success rate; the adjustment module is configured to:
determining an adjustment value ΔT；
Determining the first cut-in threshold and deltaTThe sum is the adjusted first cut-in threshold;
wherein, DeltaTObtained based on the following formula:
and the network provided by the device for Li performs SRVCC handover to the network provided by the second network equipment within the third predetermined time period, where TL is a predetermined lowest handover success rate, TH is the second predetermined handover success rate, and β is a predetermined proportional value.
In a possible implementation manner, the first predetermined condition includes that a promotion value of a handover success rate for the network provided by the second network device to respectively handover to the P networks is greater than a predetermined promotion value; the adjustment module is configured to:
decreasing the first hand-in threshold by a predetermined adjustment value;
and determining the first cut-in threshold reduced by the preset adjusting value as the adjusted first cut-in threshold.
In one possible implementation, the apparatus further includes:
a fourth determining module, configured to determine that the signal strength of the network provided by the apparatus detected by the user equipment at the first time is lower than a predetermined signal strength;
a fifth determining module, configured to determine that the signal strength of the network provided by the second network device detected by the user equipment at the first time reaches a hand-in threshold when SRVCC handover is performed from the network provided by the apparatus to the network provided by the second network device;
and a handover module, configured to send a handover instruction to the ue, where the handover instruction is used to instruct the ue to perform SRVCC handover from a network provided by the apparatus to a network provided by the second network device.
In a third aspect, a network device is provided, which comprises a processor and a memory, the memory being coupled to the processor and the memory being configured to store instructions, the processor being configured to execute the instructions to perform the method of determining a hand-in threshold as any one of the first aspect may be implemented when the instructions are executed.
In a fourth aspect, a computer storage medium is provided, the computer storage medium comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform any one of the possible methods of determining a cut-in threshold of the first aspect.
The method and the device for determining the cut-in threshold provided by the embodiment of the invention can dynamically determine the first cut-in threshold according to the historical switching information for switching from the network provided by the second network equipment to the P networks in the first preset time period, and the first cut-in threshold can reflect the network condition of the network provided by the second network equipment.
Further, the switching threshold can be dynamically adjusted in a targeted manner according to different network conditions, so that the problem of low success rate of SRVCC switching caused by the fact that the uniform switching threshold does not accord with real network conditions when the uniform switching threshold is fixedly set for each network can be effectively solved, and the success rate of SRVCC switching is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of a method of determining a cut-in threshold in an embodiment of the present invention;
fig. 2 is a block diagram of an apparatus for determining a cut-in threshold according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a network device in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document generally indicates that the preceding and following related objects are in an "or" relationship unless otherwise specified.
In order to facilitate understanding of those skilled in the art, a part of the terms herein will be explained below.
A network device, such as a base station (e.g., access point), may specifically refer to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to translate received air frames and IP packets into and out of communication with each other as a router between the wireless terminal and the rest of the access network, which may include an IP (internet protocol) network. The base station may also coordinate management of attributes for the air interface. For example, the Base Station may be a BTS (Base Transceiver Station) in GSM or CDMA, a NodeB (Base Station) in WCDMA, or an eNB (Evolved Node B) in LTE, and the present invention is not limited thereto.
A user equipment, which may be a wireless terminal or a wired terminal, may refer to a device that provides voice and/or data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a RAN (Radio Access Network) to exchange language and/or data with a Radio Access Network. For example, PCS (Personal Communication Service) phones, cordless phones, SIP (Session Initiation Protocol) phones, WLL (Wireless Local Loop) stations, PDAs (Personal Digital assistants), and the like. A wireless terminal may also be called a system, SU (Subscriber Unit), SS (Subscriber Station), MS (Mobile Station), Mobile Station, remote Station, AP (Access Point), remote terminal, Access terminal, user agent, user equipment.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
The embodiment of the invention provides a method for determining a cut-in threshold, which can be applied to various network devices capable of initiating SRVCC handover, such as a base station in an LTE network, namely eNB.
Referring to fig. 1, a flow of a method for determining a cut-in threshold according to an embodiment of the present invention is described as follows.
Step 101: the first network device obtains historical handover information of the second network device.
The SRVCC switching can be performed to a network provided by a second network device through a network provided by a first network device, the historical switching information includes information for switching from the network provided by the second network device to P networks in a first preset time period, the network formats of the P networks are the same as those of the network provided by the second network device, and P is a positive integer.
In this embodiment of the present invention, the network provided by the first network device is a network capable of performing SRVCC handover, for example, the network provided by the first network device may be a 4G network such as an LTE network, and specifically may be a network of a 4G network system such as FDD-LTE (frequency Division long term evolution) and TD-LTE (Time Division long term evolution), and the first network device may be a base station corresponding to the network capable of performing SRVCC handover. In the following, a case that the first network device is an LTE base station and a network provided by the first network device is an LTE network is taken as an example for description.
The network provided by the second network device may be a 2G or 3G network, for example, a network of a network system such as GSM (Global system for Mobile communication), TD-SCDMA (Time Division-synchronous Code Division Multiple Access), WCDMA (Wideband Code Division Multiple Access), and the second network device may be a 2G/3G base station corresponding to the 2G/3G network. SRVCC handover can be performed to a network provided by a second network device through a network provided by a first network device, that is, a 4G cell corresponding to the network provided by the first network device and a 2G/3G cell corresponding to the network provided by the second network device are adjacent to each other. In the following, a case that the second network device is a 2G base station and a network provided by the second network device is a 2G network is described as an example.
The P networks and the network provided by the second network device belong to networks in the same type of communication system, and the network systems of the P networks and the network provided by the second network device are the same, that is, for example, when the network provided by the second network device is a GSM network, the P networks are corresponding to the P GSM networks. The P networks may respectively correspond to P2G base stations, that is, one 2G base station corresponds to one 2G network, or the number of 2G base stations corresponding to the P networks may also be smaller than P, at this time, one 2G base station may correspond to multiple 2G networks, that is, the multiple 2G networks share the same 2G base station, and the network provided by the second network device may respectively initiate handover in the 2G communication system to the P networks, that is, the 2G cell corresponding to the network provided by the second network device and the P2G cells corresponding to the P networks are adjacent to each other.
The history switching information in the embodiment of the present invention includes switching information for switching from a network provided by the second network device to P networks within the first predetermined period. The first predetermined time period may be a preset time period, or may be obtained from the network immediately when the cut-in threshold needs to be determined. The first predetermined period of time may be a day, a week, a month, etc. based on different needs, and of course, the first predetermined period of time is a past time period before the current time. The switching information provided by the second network device when the network switches to the P networks respectively may include information such as a switching success rate, a switching number, and a switching threshold of each of the P networks.
Step 102: the first network device determines a first hand-in threshold when performing SRVCC handover from a network provided by the first network device to a network provided by the second network device based on the historical handover information.
For ease of description, the hand-in threshold at SRVCC handover from a network provided by a first network device to a network provided by a second network device is referred to as a first hand-in threshold in certain description scenarios herein.
Wherein the first cut-in threshold is used for indicating the lowest signal strength of the network provided by the second network device which needs to be detected when the network provided by the second network device is switched. The user equipment may be instructed to perform SRVCC handover to the network provided by the second network device only when the first network device determines that the signal strength of the network provided by the second network device detected by the user equipment reaches the first entry threshold.
In a possible implementation manner, the historical handover information of the second network device includes P hand-in thresholds of P networks in a second predetermined time period, and the number of handovers and the handover success rate of the network to the P networks, which are provided by the second network device, in the second predetermined time period, respectively. At this time, the first network device determines, based on the historical handover information, a first hand-in threshold when the network provided by the first network device performs SRVCC handover to a network provided by a second network device, which may include the following steps: firstly, the first network equipment sets the minimum cut-in threshold in the cut-in thresholds of the networks with the switching times not lower than the preset switching times and the switching success rate not lower than the first preset switching success rate in the P networks as the candidate cut-in threshold of the network provided by the second network equipment, and then determines the first cut-in threshold according to the candidate cut-in threshold.
The second predetermined time period may be the same as the first predetermined time period, or may be a certain period of time in the first predetermined time period, and the second predetermined time period may be a later period of time in the first predetermined time period, or may be a period of time with the largest number of times of switching in the first predetermined time period, or may be a period of time only belonging to the daytime stage in the first predetermined time period, which is not limited in this embodiment of the present invention.
For example, when the 2G cell corresponding to the network provided by the second network device has 4 2G neighboring cells for performing intra-2G system handover (i.e., P is 4), the number of handovers and the handover success rate for the network provided by the second network device to respectively perform handover to the 4 networks provided by the 4 2G neighboring cells in the last week (i.e., the second predetermined time period) are shown in table 1. The 2G serving cell represents a 2G cell corresponding to a network provided by the second network device, the CellID represents a cell identifier of the corresponding cell, the cut-in threshold represents a cut-in threshold of the network provided by the 2G neighboring cell, and a unit of the cut-in threshold is dBm.
TABLE 1
| 2G serving cell | 2G neighborhood | Handover success rate | Number of switching | Cut-in threshold |
| CellID 1 | CellID X1 | 94％ | 15 | -95 |
| CellID 1 | CellID X2 | 98％ | 200 | -93 |
| CellID 1 | CellID X3 | 99％ | 216 | -92 |
| CellID 1 | CellID X4 | 97％ | 78 | -96 |
Assuming that the predetermined switching frequency is 10 times and the first predetermined switching success rate is 95%, 2G neighboring cells in which the switching frequency is not less than 10 times and the switching success rate is not less than 95% among the 4 2G neighboring cells are first screened, and the screening results are shown in table 2.
TABLE 2
Furthermore, the hand-in threshold (i.e., -96) of the network provided by CellID X4 with the lowest hand-in threshold is determined from the 2G neighbor cells satisfying the predetermined number of handovers and the predetermined handover success rate, i.e., from the screening result shown in fig. 2, as the candidate hand-in threshold of the network provided by the second network device.
In a specific implementation process, the first network device determines the first cut-in threshold based on the candidate cut-in threshold, which may include the following two implementations.
The first mode is as follows:
the first network device takes the candidate hand-in threshold of the network provided by the second network device as the first hand-in threshold.
The second mode is as follows:
the first network device takes a minimum cut-in threshold of the M candidate cut-in thresholds as a first cut-in threshold, where the network provided by the first network device has M networks capable of SRVCC handover, for example, 1, 3, or 5 networks capable of SRVCC handover have corresponding M candidate cut-in thresholds.
Specifically, the two manners may be selected according to the type of the first network device. At present, LTE network equipment is divided into two types, one type of LTE network equipment supports the setting of an SRVCC switching threshold by a sub-adjacent cell, and the other type of LTE network equipment only supports the unified setting of the SRVCC switching threshold by all the adjacent cells.
Typically, the network provided by the first network device has a plurality of SRVCC capable networks, for example, M, and the M SRVCC capable networks have M candidate hand-in thresholds.
When the first network device supports the subzone to set the SRVCC handover threshold, a first mode or a second mode may be adopted, in the first mode, the candidate handover threshold of the network provided by the second network device is directly used as the first handover threshold, and in the second mode, the minimum handover threshold is selected from the multiple candidate handover thresholds as the first handover threshold.
When the first network device only supports all the neighboring cells to uniformly set the SRVCC handover threshold, the second method may be adopted. For example, when M is 6, the candidate hand-in thresholds for 6 2G networks that can initiate SRVCC handover by the 4G network provided by the first network device are shown in table 3. The 2G cell represents a 2G cell corresponding to a 2G network that can initiate SRVCC handover by a 4G network provided by the first network device.
TABLE 3
| 2G cell | Candidate hand-in threshold |
| CellID 1 | -93 |
| CellID 2 | -92 |
| CellID 3 | -96 |
| CellID 4 | -93 |
| CellID 5 | -94 |
| CellID 6 | -95 |
As can be seen from Table 3, CellID 3 has the lowest candidate cut-in threshold of-96 dBm, and according to the second mode, it is possible to use-96 dBm as the first cut-in threshold.
In addition, according to actual needs, the embodiment of the present invention may further include other schemes for determining the first hand-in threshold, for example, determining the lower hand-in threshold of the M candidate hand-in thresholds as the first hand-in threshold, for example, using the candidate hand-in threshold of the next to last low CellID 6 in the above table (i.e., -95dBm) as the first hand-in threshold.
In one possible implementation, after the first network device determines, based on the historical handover information, a first handover threshold for SRVCC handover from a network provided by the first network device to a network provided by the second network device, the first network device may further perform the following operations:
firstly, different judgments are made according to different ways of determining the first cut-in threshold. When the first mode is adopted, determining whether a network provided by the second network equipment meets a first preset condition, and when the second mode is adopted, determining whether at least one network in the M networks capable of carrying out SRVCC handover meets the first preset condition;
and when the judgment result is yes, adjusting the first cut-in threshold, obtaining the adjusted first cut-in threshold through adjustment, and taking the adjusted first cut-in threshold as the cut-in threshold when the network provided by the first network equipment performs SRVCC handover to the network provided by the second network equipment.
That is to say, after the first cut-in threshold is determined, due to the change of the network environment between the first network device and the second network device, or the reason that the cut-in effect of the first cut-in threshold is not ideal, and the like, it may also be determined whether the first cut-in threshold needs to be adjusted, if the adjustment is needed, the corresponding adjustment is performed, and then the adjusted first cut-in threshold is used as the cut-in threshold when the network provided by the first network device performs SRVCC handover to the network provided by the second network device.
After the first switching threshold is determined according to the historical switching information, whether the network provided by the second network equipment meets the first preset condition or not is determined, the first switching threshold is dynamically adjusted, the problem that the previously determined first switching threshold cannot meet the changed network environment due to the change of the network environment is solved, and meanwhile, the problem that the previously determined first switching threshold is inaccurate due to accidental errors and the like when the first switching threshold is determined previously is also solved. The first cut-in threshold is dynamically adjusted, so that the change of a network environment can be timely and effectively adapted, the first cut-in threshold can be corrected, and a better SRVCC switching effect is achieved.
The first predetermined condition may include a plurality of conditions, for example, one possible predetermined condition is that the network interference received by the network provided by the second network device is reduced by more than a certain reduction amplitude, another possible predetermined condition is that the network congestion of the network provided by the second network device is reduced by more than a certain reduction amplitude, another possible predetermined condition is that the success rate of the network provided by the second network device performing the intra-2G system handover is increased by more than a certain increase amplitude, and so on. In a specific implementation process, the corresponding first predetermined condition may be selectively set according to the value of the parameter that can be obtained, and of course, other possible setting manners of the first predetermined condition may also be included, which is not necessarily illustrated here.
When the interference of the network provided by the second network device is reduced, the network congestion is reduced, and the success rate of the network provided by the second network device for performing the 2G intra-system handover is increased, it indicates that the success probability of the 2G network access is increased, and at this time, the reduction of the cut-in threshold of the network provided by the second network device can be attempted. For this scenario, the switching threshold may be adjusted by a small amount with the smallest adjustment step, for example, by 1dBm each time.
In a possible implementation manner, when the handover success rate of the network provided by the first network device performing SRVCC handover to the network provided by the second network device within the third predetermined time period is lower than the second predetermined handover success rate, the first network device may adjust the first hand-in threshold in the following manner to obtain the adjusted first hand-in threshold. Wherein the third predetermined time period is later than the first predetermined time period, and the third time period is a time period after the first cut threshold is determined in step 102, and the first predetermined time period may be a day, a week, a month, etc. based on different requirements.
First, the first network device determines an adjustment value ΔTWherein, isTThe calculation is based on the formula (1) to obtain:
Lia handover success rate, T, for the network provided for the first network device to perform SRVCC handover to the network provided for the second network device for a third predetermined time periodLFor a predetermined minimum handover success rate, THFor the second predetermined handover success rate, β is a predetermined proportional value.
In determining the adjustment value deltaTThereafter, the first network device may directly hand-in the first hand-in threshold with ΔTAnd the sum is used as the adjusted first cut-in threshold.
The formula (1) is used for determining an adjustment value during adjustment, and when the difference between the SRVCC switching success rate and the second predetermined switching success rate is large, the adjustment value with a large step length is adopted, so that the SRVCC switching success rate reaches the second predetermined switching success rate as soon as possible; and when the SRVCC switching success rate is smaller than the second preset switching success rate, fine adjustment is carried out by adopting an adjustment value with a smaller step length so as to realize the convergence of regulation and control.
In a possible implementation manner, when the increase value of the handover success rate of the intra-system handover from the network provided by the second network device to the P networks respectively is greater than the predetermined increase value, the first network device may first decrease the first cut-in threshold by the predetermined adjustment value, and then use the first cut-in threshold decreased by the predetermined adjustment value as the adjusted first cut-in threshold, that is, the first cut-in threshold minus the predetermined adjustment value is the adjusted first cut-in threshold.
In this adjustment mode, the upgrade values of the handover success rates of the networks provided by the second network device for performing intra-system handover to the P networks respectively are all greater than the predetermined upgrade value or most of the upgrade values are greater than the predetermined upgrade value, which indicates that the network quality of the 2G system in which the second network device is located is upgraded, and the network environment is improved, so that the cut-in threshold of the 2G network can be properly reduced.
The predetermined adjustment value may be preset by the system, or preset when the second network device is installed and debugged, for example, the predetermined adjustment value is set to 1 dBm.
In a possible implementation manner, the embodiment of the present invention may further determine to adjust a hand-in threshold when to stop performing SRVCC handover on a network provided by the first network device to a network provided by the second network device, for example, the determination may be performed according to the following two aspects.
In a first aspect, when the SRVCC handover success rate is greater than a second predetermined handover success rate, the continued adjustment of the first hand-in threshold is stopped.
When the cut-in threshold for SRVCC switching from a network provided by a first network device to a network provided by a second network device has reached the preset highest cut-in threshold, but the SRVCC switching success rate is still lower than a second preset switching success rate, if an adjusted first cut-in threshold exists, the difference between the SRVCC switching success rate and the second preset switching success rate is within a preset difference value, selecting the minimum cut-in threshold as the finally used adjusted first cut-in threshold; and if the first adjusted cut-in threshold with the difference between the SRVCC switching success rate and the second predetermined switching success rate within the preset difference value does not exist, selecting the first adjusted cut-in threshold with the minimum difference between the SRVCC switching success rate and the second predetermined switching success rate as the first adjusted cut-in threshold for final use.
In a second aspect, when the first cut-in threshold is adjusted, if any one of conditions of network congestion reduction, interference reduction and cut-in success rate within the 2G system in which the second network device is located, which are provided by the second network device, is satisfied, a minimum adjusted first cut-in threshold is selected from at least one adjusted first cut-in threshold that makes the SRVCC handover success rate greater than a second predetermined handover success rate, and is finally used.
Further, after the first handover threshold is set by the foregoing described embodiment, if the first network device determines that the signal strength of the network provided by the first network device detected by the user equipment at the first time is lower than the predetermined signal strength and the signal strength of the network provided by the second network device detected at the first time reaches the first handover threshold or the adjusted first handover threshold, a handover instruction may be sent to the user equipment to instruct the user equipment to perform SRVCC handover from the network provided by the first network device to the network provided by the second network device.
If the switching-in threshold is not adjusted when SRVCC handover is performed from the network provided by the first network device to the network provided by the second network device, the first switching-in threshold reached may be used as a precondition for sending a handover command, and if the switching-in threshold is adjusted, the first switching-in threshold reached after adjustment may be used as a precondition for sending a handover command. The user equipment can be an electronic device with a wireless communication function, such as a mobile phone and a tablet computer.
In the embodiment of the invention, the first cut-in threshold can be dynamically determined according to the historical switching information for switching from the network provided by the second network equipment to the P networks in the first preset time period, and the first cut-in threshold can reflect the network condition of the network provided by the second network equipment, so that the cut-in threshold can be dynamically adjusted according to different network conditions.
Further, the switching threshold can be dynamically adjusted in a targeted manner according to different network conditions, so that the problem of low success rate of SRVCC switching caused by the fact that the uniform switching threshold does not accord with real network conditions when the uniform switching threshold is fixedly set for each network can be effectively solved, and the success rate of SRVCC switching is further improved.
Based on the same inventive concept, please refer to fig. 2, an embodiment of the present invention provides an apparatus for determining a hand-in threshold, which may be, for example, the first network device described above. The apparatus includes a first obtaining module 201 and a first determining module 202, and the first obtaining module 201 and the first determining module 202 in the embodiment of the present invention may implement the relevant functional units through a hardware processor. Wherein:
a first obtaining module 201, configured to obtain historical handover information of a second network device; the device can perform Single Radio Voice Call Continuity (SRVCC) switching to a network provided by second network equipment through the network provided by the device, the historical switching information comprises information for switching from the network provided by the second network equipment to P networks in a first preset time period, the network formats of the P networks are the same as those of the network provided by the second network equipment, and P is a positive integer;
a first determining module 202, configured to determine, based on the historical handover information, a first hand-in threshold when performing SRVCC handover from a network provided by the apparatus to a network provided by the second network device; wherein the first cut-in threshold is used for indicating the lowest signal strength of the network provided by the second network device which needs to be detected when the network provided by the second network device is switched.
In a possible implementation manner, the historical handover information includes P hand-in thresholds of P networks in a second predetermined time period, and the number of handovers and the success rate of handovers, in which the networks provided by the second network device are respectively handed over to the P networks, in the second predetermined time period; the first determining module 202 is configured to:
determining the minimum cut-in threshold in the cut-in thresholds of the networks of which the switching times are not less than the preset switching times and the switching success rate is not less than the first preset switching success rate in the P networks as a candidate cut-in threshold of the network provided by the second network equipment;
based on the candidate cut-in threshold, a first cut-in threshold is determined.
In one possible implementation, the first determining module 202 is configured to:
determining a candidate cut-in threshold as a first cut-in threshold; or
Determining the minimum cut-in threshold of the M candidate cut-in thresholds as a first cut-in threshold; the network provided by the device is provided with M networks capable of carrying out SRVCC switching, the M networks capable of carrying out SRVCC switching are provided with M corresponding candidate cut-in thresholds, and M is a positive integer.
In one possible embodiment, the apparatus further comprises:
a second determining module, configured to determine whether the network provided by the second network device satisfies a first predetermined condition or whether at least one of the M networks capable of performing the SRVCC handover satisfies the first predetermined condition after the first determining module 202 determines, based on the historical handover information, a first handover threshold at the time of performing the SRVCC handover from the network provided by the apparatus to the network provided by the second network device;
the adjusting module is used for adjusting the first cut-in threshold if the first cut-in threshold is met so as to obtain an adjusted first cut-in threshold;
a third determining module, configured to determine that the adjusted first hand-in threshold is a hand-in threshold for SRVCC handover from a network provided by the apparatus to a network provided by the second network device.
In a possible implementation, the first predetermined condition includes that a handover success rate of SRVCC handover performed by the network provided by the apparatus to the network provided by the second network device within a third predetermined time period is lower than a second predetermined handover success rate; the adjustment module is used for:
determining an adjustment value ΔT；
Determining a first cut threshold and deltaTThe sum is the adjusted first cut-in threshold;
wherein, DeltaTObtained based on the following formula:
and the network provided by the device and Li performs SRVCC handover to the network provided by the second network equipment within a third preset time period, wherein TL is a preset lowest handover success rate, TH is a second preset handover success rate, and beta is a preset proportional value.
In a possible implementation manner, the first predetermined condition includes that a boost value of a handover success rate for the network provided by the second network device to respectively perform handover to the P networks is greater than a predetermined boost value; the adjustment module is used for:
decreasing the first cut-in threshold by a predetermined adjustment value;
and determining the first cut-in threshold reduced by the preset adjusting value as the adjusted first cut-in threshold.
In one possible embodiment, the apparatus further comprises:
a fourth determining module, configured to determine that the signal strength of the network provided by the apparatus detected by the user equipment at the first time is lower than the predetermined signal strength;
a fifth determining module, configured to determine that a signal strength of a network provided by the second network device detected by the user equipment at the first time reaches a hand-in threshold when SRVCC handover is performed from the network provided by the apparatus to the network provided by the second network device;
and the switching module is used for sending a switching instruction to the user equipment, wherein the switching instruction is used for indicating the user equipment to carry out SRVCC switching from the network provided by the device to the network provided by the second network equipment.
The device for determining the hand-in threshold in the embodiment of the present invention may dynamically determine the first hand-in threshold according to historical switching information for switching from the network provided by the second network device to the P networks within the first predetermined time period, and since the first hand-in threshold can reflect the network condition of the network provided by the second network device, the hand-in threshold can be dynamically adjusted for different network conditions, and compared with a method that only a uniform hand-in threshold can be fixedly set, a method that can flexibly adjust the hand-in threshold is provided, and a targeted dynamic adjustment can be performed for different network conditions.
Further, the switching threshold can be dynamically adjusted in a targeted manner according to different network conditions, so that the problem of low success rate of SRVCC switching caused by the fact that the uniform switching threshold does not accord with real network conditions when the uniform switching threshold is fixedly set for each network can be effectively solved, and the success rate of SRVCC switching is further improved.
Based on the same inventive concept, please refer to fig. 3, an embodiment of the present invention further provides a network device, which includes a memory 301 and a processor 302, wherein the memory 301 and the processor 302 can be connected to the same bus 300.
The processor 302 may be a CPU (central processing unit) or an ASIC (Application specific integrated Circuit), may be one or more integrated circuits for controlling program execution, may be a baseband chip, and so on.
The number of the memories 301 may be one or more, and one memory 301 is illustrated in fig. 3. The Memory 301 may be a ROM (Read Only Memory), a RAM (Random Access Memory), a magnetic disk Memory, or the like, and in addition, the Memory 301 may be used for storing data and the like.
By programming the processor 302, the code corresponding to any one of the aforementioned methods for determining the cut-in threshold is solidified in the chip, so that the chip can execute any one of the aforementioned methods for determining the cut-in threshold when running, and how to program the processor 302 is a technique known by those skilled in the art and will not be described herein again.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional units is merely used as an example, and in practical applications, the above function distribution may be performed by different functional units according to needs, that is, the internal structure of the device is divided into different functional units to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the described units or division of units is only one type of division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above embodiments are only used to describe the technical solutions of the present invention in detail, but the above embodiments are only used to help understanding the method and the core idea of the present invention, and should not be construed as limiting the present invention. Those skilled in the art should also appreciate that they can easily conceive of various changes and substitutions within the technical scope of the present disclosure.
Claims (14)
1. A method of determining a hand-in threshold, comprising:
the first network equipment obtains historical switching information of the second network equipment; the SRVCC handover can be performed to a network provided by the second network device through a network provided by the first network device, the historical handover information includes information for performing handover from the network provided by the second network device to P networks within a first predetermined period, the network formats of the P networks and the network provided by the second network device are the same, and P is a positive integer;
the first network equipment determines a first cut-in threshold when SRVCC switching is carried out from a network provided by the first network equipment to a network provided by the second network equipment based on the historical switching information; wherein the first cut-in threshold is used for indicating the lowest signal strength of the network provided by the second network device which needs to be detected when the network provided by the second network device is switched.
2. The method for determining a hand-in threshold according to claim 1, wherein the historical handover information includes P hand-in thresholds of the P networks in a second predetermined time period, and the number of handovers and the handover success rate of the networks provided by the second network device to perform the handover to the P networks respectively in the second predetermined time period; the first network device determines, based on the historical handover information, a first hand-in threshold when performing SRVCC handover from a network provided by the first network device to a network provided by the second network device, and includes:
the first network equipment determines that the minimum cut-in threshold in the cut-in thresholds of the networks with the switching times not lower than the preset switching times and the switching success rate not lower than the first preset switching success rate in the P networks is a candidate cut-in threshold of the network provided by the second network equipment;
the first network device determines the first hand-in threshold based on the candidate hand-in threshold.
3. The method of claim 2, wherein the first network device determines the first hand-in threshold based on the candidate hand-in threshold, comprising:
the first network device determines that the candidate hand-in threshold is the first hand-in threshold; or
The first network equipment determines that the minimum cut-in threshold in M candidate cut-in thresholds is the first cut-in threshold; the network provided by the first network equipment is provided with M networks capable of carrying out SRVCC handover, the M networks capable of carrying out SRVCC handover are provided with corresponding M candidate cut-in thresholds, and M is a positive integer.
4. The method of determining a hand-in threshold of claim 3, wherein after the first network device determines a first hand-in threshold for an SRVCC handover from a network provided by the first network device to a network provided by the second network device based on the historical handover information, the method further comprises:
the first network device determines whether a network provided by the second network device meets a first predetermined condition, or the first network device determines whether at least one network of the M networks capable of performing SRVCC handover meets the first predetermined condition;
if so, the first network equipment adjusts the first cut-in threshold to obtain an adjusted first cut-in threshold;
and the first network equipment determines the adjusted first cut-in threshold as a cut-in threshold when SRVCC switching is carried out from the network provided by the first network equipment to the network provided by the second network equipment.
5. The method of claim 4, wherein the first predetermined condition comprises a handover success rate of the network provided by the first network device for SRVCC handover to the network provided by the second network device within a third predetermined time period being lower than a second predetermined handover success rate; the first network device adjusting the first hand-in threshold to obtain an adjusted first hand-in threshold, including:
the first network device determines an adjustment value ΔT；
The first network device determines the first hand-in threshold and deltaTThe sum is the adjusted first cut-in threshold;
wherein, DeltaTObtained based on the following formula:
Lia handover success rate, T, for SRVCC handover of the network provided for the first network device to the network provided for the second network device within the third predetermined time periodLFor a predetermined minimum handover success rate, THFor the second predetermined handover success rate, β is a predetermined proportional value.
6. The method of determining a hand-in threshold of claim 4, wherein the first predetermined condition includes that a boost value of a handover success rate of a network provided by the second network device respectively handing over to the P networks is greater than a predetermined boost value; the first network device adjusting the first hand-in threshold to obtain an adjusted first hand-in threshold, including:
the first network device lowering the first hand-in threshold by a predetermined adjustment value;
and the first network equipment determines that the first cut-in threshold reduced by the preset adjusting value is the adjusted first cut-in threshold.
7. The method of determining a hand-in threshold of any of claims 1-6, wherein the method further comprises:
the first network equipment determines that the signal strength of a network provided by the first network equipment detected by user equipment at a first moment is lower than a preset signal strength;
the first network equipment determines that the signal strength of the network provided by the second network equipment detected by the user equipment at the first moment reaches a cut-in threshold when SRVCC handover is carried out from the network provided by the first network equipment to the network provided by the second network equipment;
the first network equipment sends a switching instruction to the user equipment, wherein the switching instruction is used for indicating the user equipment to carry out SRVCC switching from the network provided by the first network equipment to the network provided by the second network equipment.
8. An apparatus for determining a hand-in threshold, comprising:
a first obtaining module, configured to obtain historical handover information of a second network device; the device can perform Single Radio Voice Call Continuity (SRVCC) handover to a network provided by the second network equipment through the network provided by the device, the historical handover information includes information for performing handover from the network provided by the second network equipment to P networks within a first preset time period, the network formats of the P networks are the same as those of the network provided by the second network equipment, and P is a positive integer;
a first determining module, configured to determine, based on the historical handover information, a first hand-in threshold when performing SRVCC handover from a network provided by the apparatus to a network provided by the second network device; wherein the first cut-in threshold is used for indicating the lowest signal strength of the network provided by the second network device which needs to be detected when the network provided by the second network device is switched.
9. The apparatus of claim 8, wherein the historical handover information includes P hand-in thresholds for the P networks in a second predetermined time period, and a number of handovers and a success rate of handovers, respectively, to the P networks by the network provided by the second network device in the second predetermined time period; the first determination module is to:
determining that the minimum cut-in threshold in the cut-in thresholds of the networks of which the switching times are not lower than the preset switching times and the switching success rate is not lower than the first preset switching success rate in the P networks is a candidate cut-in threshold of the network provided by the second network equipment;
determining the first hand-in threshold based on the candidate hand-in threshold.
10. The apparatus of claim 9, wherein the first determination module is to:
determining the candidate cut-in threshold as the first cut-in threshold; or
Determining a minimum cut-in threshold of the M candidate cut-in thresholds as the first cut-in threshold; the network provided by the device is provided with M networks capable of carrying out SRVCC switching, wherein the M networks capable of carrying out SRVCC switching are provided with corresponding M candidate cut-in thresholds, and M is a positive integer.
11. The apparatus of claim 10, wherein the apparatus further comprises:
a second determining module, configured to determine whether the network provided by the second network device meets a first predetermined condition or whether at least one of the M networks capable of performing SRVCC handover meets the first predetermined condition after the first determining module determines, based on the historical handover information, a first handover threshold at the time of performing SRVCC handover from the network provided by the apparatus to the network provided by the second network device;
the adjusting module is used for adjusting the first cut-in threshold if the first cut-in threshold is met so as to obtain an adjusted first cut-in threshold;
a third determining module, configured to determine that the adjusted first hand-in threshold is a hand-in threshold when SRVCC handover is performed from a network provided by the apparatus to a network provided by the second network device.
12. The apparatus of claim 11, wherein the first predetermined condition comprises a handover success rate for SRVCC handover by the network provided by the apparatus to the network provided by the second network device within a third predetermined time period being lower than a second predetermined handover success rate; the adjustment module is configured to:
determining an adjustment value ΔT；
Determining the first cut-in threshold and deltaTThe sum is the adjusted first cut-in threshold;
wherein, DeltaTObtained based on the following formula:
Lithe network provided for the device performs the switching success rate, T, of the SRVCC switching to the network provided for the second network equipment in the third predetermined time periodLFor a predetermined minimum handover success rate, THFor the second predetermined handover success rate, β is a predetermined proportional value.
13. The apparatus according to claim 11, wherein the first predetermined condition includes that a boosted value of a handover success rate of the network provided by the second network device respectively handing over to the P networks is greater than a predetermined boosted value; the adjustment module is configured to:
decreasing the first hand-in threshold by a predetermined adjustment value;
and determining the first cut-in threshold reduced by the preset adjusting value as the adjusted first cut-in threshold.
14. The apparatus of any one of claims 8-13, wherein the apparatus further comprises:
a fourth determining module, configured to determine that the signal strength of the network provided by the apparatus detected by the user equipment at the first time is lower than a predetermined signal strength;
a fifth determining module, configured to determine that the signal strength of the network provided by the second network device detected by the user equipment at the first time reaches a hand-in threshold when SRVCC handover is performed from the network provided by the apparatus to the network provided by the second network device;
and a handover module, configured to send a handover instruction to the ue, where the handover instruction is used to instruct the ue to perform SRVCC handover from a network provided by the apparatus to a network provided by the second network device.
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| CN111314971B (en) * | 2018-12-12 | 2022-01-25 | 中国移动通信集团北京有限公司 | Network switching method and device |
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