CN114466424B - 5G cell switching method for improving UDN connection stability - Google Patents
5G cell switching method for improving UDN connection stability Download PDFInfo
- Publication number
- CN114466424B CN114466424B CN202111396577.5A CN202111396577A CN114466424B CN 114466424 B CN114466424 B CN 114466424B CN 202111396577 A CN202111396577 A CN 202111396577A CN 114466424 B CN114466424 B CN 114466424B
- Authority
- CN
- China
- Prior art keywords
- cell
- mts
- handover
- offset
- switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/04—Reselecting a cell layer in multi-layered cells
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/165—Performing reselection for specific purposes for reducing network power consumption
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a 5G cell switching method for improving the connection stability of UDN, which solves the problem of poor switching connection stability in a 5G UDN network in the prior art and comprises the following steps: accounting for signal level offset; analyzing the disconnection rate; synthesizing system hysteresis; corrected A3 switching judgment; and optimizing ping-pong handover. The invention firstly analyzes the offset of the signal level relative to the transmitting power according to different cell equipment types under the UDN architecture. And establishing a matching curve of the specific offset parameter according to the neighbor cell disconnection rate index. And evaluating the average minimum residence time of the cell in switching, wherein the system resource is inclined towards the cell with longer residence time, filtering the cell which is not suitable for the current mobile terminal to access through a speed threshold, and establishing a target neighbor list participating in switching. Judging the ping-pong switching state affecting the UDN connection stability, selecting the optimal cell from the target neighbor cell list as the final target service cell for switching, and optimizing the use perception of the user.
Description
Technical Field
The invention relates to the technical field of 5G communication, in particular to a 5G cell switching method for improving the connection stability of UDN.
Background
The UDN (Ultra Dense Networks, ultra dense network) can greatly increase the capacity of a 5G system by means of abundant and various devices, and further development assistance of the Internet of things and the Internet is achieved in the future. However, because the UDN network devices differ in phase, the transmission power is different, so that the stability of mobile connection in the UDN network is deviated, the switching ping-pong effect of the mobile terminal is obvious, and the user perception is further affected. Therefore, how to perform UDN optimization with pertinence and improve the network connection stability becomes one of the 5G problems to be solved. At present, the effective methods are not too much, have focus on evaluating the movement state of the user, have adaptation to the reference signal, establish a virtual cell, and the like, but the researches do not start with the key indexes of connection stability, and often do not start with each other.
Disclosure of Invention
The invention provides a 5G cell switching method for improving the connection stability of a 5G UDN network, which aims to solve the problem of poor switching connection stability in the prior art, starts from a disconnection rate and performs point-to-point compensation based on cell specific offset. Analyzing core indexes such as minimum residence time related to cell switching, and dynamically establishing corresponding system hysteresis; each kind of UDN equipment sets up the maximum access speed threshold to ensure that the terminal can establish smooth and reliable target switching cell sets when moving at different speeds, and analyzes the corresponding ping-pong switching state, and selects the optimal cell as the target serving cell, thereby improving the perception of users and achieving the aim of optimizing switching. The switching parameters are adaptively adjusted, and the performance of the cell is fully considered to select a proper target neighbor cell.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A5G Cell switching method for improving UDN connection stability comprises the steps of N=n+1 cells CLLN= { Cell s }∪CLLn＝{Cell s ，Cell 1 ，…，Cell n -consisting of macro-cell, micro-cell, home base station, relay station etc.; wherein, cell s Clln= { Cell for the primary serving Cell of the current mobile terminal 1 ，…，Cell n -is its neighbor; cell signal level { RSRP s ，RSRP 1 ，…，RSRP n Transmit power { Rx }, transmit power s ，Rx 1 ，…，Rx n Rate of dropped calls { Drp } 1 ，Drp 2 ，…，Drp n Cell handover average residence time { Mts }, cell handover average residence time { Mts { cell handover average residence time { Mts { cell handover average cell handover cell 1 ，Mts 2 ，…，Mts n Maximum terminal speed { Vap } for each base station to access 1 ，Vap 2 ，…，Vap n Ping pong handover rate { Pph } 1 ，Pph 2 ，…，Pph n }；
The method comprises the following steps:
step one, calculating the level offset of the signal: adopting a level offset mode to replace the absolute value of the signal level, and calculating the offset of the signal level of each cell at the current moment and the cell transmitting power;
step two, analyzing the disconnection rate: setting basic hysteresis parameters and specific offset coefficients, and calculating basic offset and neighbor cell specific offset according to the disconnection rate;
step three, system hysteresis synthesis: setting a switching minimum residence time, a residence time threshold, a hysteresis threshold and a hysteresis coefficient, and calculating cell hysteresis under different conditions;
step four, corrected A3 switching judgment: the neighbor cells meeting the level offset requirement are included in the candidate set, so that switching is triggered;
step five, optimizing ping-pong switching: selecting a set meeting the Case4 condition, calculating a target set according to the set, and selecting a neighbor cell with the minimum ping-pong handover rate from the target set as a target cell for the handover.
The invention relates to a 5G cell switching method IUSHA (Improving UDN link Stability based 5G Handover Algorithm) for improving the connection stability of UDN, which firstly analyzes the offset of signal level relative to transmitting power according to different cell equipment types under a UDN architecture. And establishing a matching curve of the specific offset parameter according to the neighbor cell disconnection rate index. And evaluating the average minimum switching residence time of each cell, tilting the system resource towards the cell with longer residence time, filtering the cell which is not suitable for the current mobile terminal to access through a speed threshold, and finally establishing a target neighbor list participating in switching. Judging the ping-pong switching state affecting the UDN connection stability, selecting the optimal cell from the target neighbor cell list as the final target service cell for switching, and further optimizing the use perception of the user.
Preferably, the first step includes the following: adopting a level offset mode to replace the traditional absolute value of signal level, and eliminating the signal level gap of different types of equipment in the UDN network; for each cell in the CLLN, calculating the offset of the signal level at the current moment and the cell transmission power
dRP N ＝{dtRP s ，dtRP 1 ，…，dtRP n }＝{RSRP s -Rx s ，RSRP 1 -Rx 1 ，…，RSRP n -Rx n }。
Preferably, the second step includes the following:
step 2-1: setting a basic hysteresis parameter Hysm and a specific offset coefficient CIO ft ；
Step 2-2: primary serving Cell s Specific offset O of (2) cs Zero clearing; for neighbor clln= { Cell 1 ，…，Cell n Each Cell in } i Calculate the base offset COB i ＝exp((-1)*Drp i ) Wherein exp (·) is a natural exponential function; calculating the CIO of the specific offset of the adjacent cell i ＝CIO ft *COB i ＝CIO ft *exp((-1)*Drp i )。
Preferably, the third step includes the following:
step 3-1: setting a switching minimum dwell time MTS and a dwell time threshold theta MTS Hysteresis threshold theta Hys Hysteresis coefficient sigma Hys ；
Step 3-2: for clln= { Cell 1 ，…，Cell n Each Cell in } i If the Case1 condition Mts is satisfied i ≥θ MTS * MTS, calculating cell hysteresis Hys_IUSHA i =hysm; if the Case2 condition MTS is less than or equal to Mts i ≤θ MTS * MTS, first calculate hysteresis slope X k ＝(1-θ Hys )*Hysm/(θ MTS -1) MTS, calculating the hysteresis intercept
Y b ＝Hysm-X k *θ MTS *MTS＝Hysm-(1-θ Hys )*Hysm/(θ MTS -1)*MTS*θ MTS *MTS＝Hysm-(1-θ Hys )*Hysm*θ MTS /(θ MTS -1)＝(θ MTS *θ Hys -1)*Hysm/(θ MTS -1) then calculating
If Case3 condition Mts is satisfied i < MTS, calculation
Preferably, the fourth step includes the following:
step 4-1: a3 event M n +O fn +O cn -Hys＞M s +O fs +O cs +off indicates that the signal quality of the neighbor cell is better than the signal quality of the serving cell, thereby triggering handover; conversely, A3 satisfies the away state;
wherein M is n O, which is the measurement result of the neighboring cell fn For a frequency specific offset on the adjacent cell frequency, O cn A specific offset for the neighboring cell, if there is no configuration, set to 0;
M s o, the measurement result of the serving cell fs O for a frequency specific offset on the serving cell frequency cs Hys is the hysteresis of the event and Off is the inexpensive parameter of the event for a particular offset of the serving cell;
step 4-2: for clln= { Cell 1 ，…，Cell n Each neighbor Cell in } i Will A3 switch function Hdf i ＝(M i +O fi +O ci -Hys i )-(M s +O fs +O cs ) Modified to Hdf i ＝dtRP i +CIO i -Hys_IUSHA i -dtRP s ；
Step 4-3: case5 condition Hdf will be met i Adjacent to > Off is included in candidate set CLL cnd Is a kind of medium.
Preferably, the fifth step includes the following:
step 5-1: the current terminal movement speed Vct is set, and clln= { Cell is set 1 ，…，Cell n Each Cell in } i Select out the condition Vct > Vap meeting Case4 i Set cso= { Cell j ，Cell j+1 …，Cell j+k-1 Calculation target set tao=cll } cnd -CSO；
Step 5-2: and selecting a neighbor cell with the minimum ping-pong handover rate from the TAO as a target cell for the handover.
Therefore, the invention has the following beneficial effects: cell specific offset compensation can be performed according to the cell disconnection rate; according to the minimum residence time of the cell during switching, dynamically matching corresponding system hysteresis; screening a base station list suitable for participating in handover according to the mobile speed of the terminal, and finally obtaining a target cell set; on the basis, through analysis of historical ping-pong switching rate, a target neighbor cell with optimal ping-pong effect is selected for switching, so that stability of UDN switching connection is improved, and user perception is further optimized.
Drawings
Fig. 1 is a flow chart of the present invention.
Fig. 2 is a comparison diagram of the handover target serving cell of the module of the present invention in the closed and open states.
FIG. 3 is a graph showing the average value of candidate neighbor cell levels in the closed and open states.
Fig. 4 is a graph comparing load averages of candidate neighbor cells of the module in the closed and open states.
Fig. 5 is a graph comparing the switching hysteresis of the module of the present invention in the closed and open states.
Fig. 6 is a table tennis effect comparison of the module of the present invention in the closed and open states.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
Example 1:
as shown in fig. 1, the present embodiment provides a 5G Cell handover method for improving UDN connection stability, including n=n+1 cells clln= { Cell s }∪CLLn＝{Cell s ，Cell 1 ，…，Cell n -consisting of macro-cell, micro-cell, home base station, relay station etc.; wherein, cell s Clln= { Cell for the primary serving Cell of the current mobile terminal 1 ，…，Cell n -is its neighbor; cell signal level { RSRP s ，RSRP 1 ，…，RSRP n Transmit power { Rx }, transmit power s ，Rx 1 ，…，Rx n Rate of dropped calls { Drp } 1 ，Drp 2 ，…，Drp n Cell handover average residence time { Mts }, cell handover average residence time { Mts { cell handover average residence time { Mts { cell handover average cell handover cell 1 ，Mts 2 ，…，Mts n Maximum terminal speed { Vap } for each base station to access 1 ，Vap 2 ，…，Vap n Ping pong handover rate { Pph } 1 ，Pph 2 ，…，Pph n }；
Step 1: accounting for signal level offset;
because the signal level difference of different types of equipment in the UDN network is larger, the invention adopts a level offset mode to replace the traditional signal level absolute value; for each cell in the CLLN, an offset dRP of the signal level at the current time and the cell transmit power is calculated N ＝{dtRP s ，dtRP 1 ，…，dtRP n }＝{RSRP s -Rx s ，RSRP 1 -Rx 1 ，…，RSRP n -Rx n }；
Step 2: analyzing the disconnection rate;
step 2-1: setting a basic hysteresis parameter Hysm and a specific offset coefficient CIO ft ；
Step 2-2: primary serving Cell s Specific offset O of (2) cs Zero clearing; for neighbor clln= { Cell 1 ，…，Cell n Each Cell in } i Calculate the base offset COB i ＝exp((-1)*Drp i ) Wherein exp (·) is a natural exponential function; calculating the CIO of the specific offset of the adjacent cell i ＝CIO ft *COB i ＝CIO ft *exp((-1)*Drp i )；
Step 3: system hysteresis synthesis
Step 3-1: setting a switching minimum dwell time MTS and a dwell time threshold theta MTS Hysteresis threshold theta Hys Hysteresis coefficient sigma Hys ；
Step 3-2: for clln= { Cell 1 ，…，Cell n Each Cell in } i If the Case1 condition Mts is satisfied i ≥θ MTS * MTS, calculating cell hysteresis Hys_IUSHA i =hysm; if the Case2 condition MTS is less than or equal to Mts i ≤θ MTS * MTS, first calculate hysteresis slope X k ＝(1-θ Hys )*Hysm/(θ MTS -1) MTS, calculating the hysteresis intercept
Y b ＝Hysm-X k *θ MTS *MTS＝Hysm-(1-θ Hys )*Hysm/(θ MTS -1)*MTS*θ MTS *MTS＝Hysm-(1-θ Hys )*Hysm*θ MTS /(θ MTS -1)＝(θ MTS *θ Hys -1)*Hysm/(θ MTS -1) and then calculating
If Case3 condition Mts is satisfied i < MTS, calculation
Step 4: corrected A3 switching judgment;
step 4-1: a3 event M n +O fn +O cn -Hys＞M s +O fs +O cs +off indicates that the signal quality of the neighbor cell is better than the signal quality of the serving cell, thereby triggering handover. Conversely, A3 satisfies the away state. Wherein M is n O, which is the measurement result of the neighboring cell fn For a frequency specific offset on the adjacent cell frequency, O cn For a specific offset of the neighboring cell, if there is no such configuration, it is set to 0.M is M s O, the measurement result of the serving cell fs O for a frequency specific offset on the serving cell frequency cs Hys is the hysteresis of the event and Off is the inexpensive parameter of the event for a particular offset of the serving cell;
step 4-2: for clln= { Cell 1 ，…，Cell n Each neighbor Cell in } i Will A3 switch function Hdf i ＝(M i +O fi +O ci -Hys i )-(M s +O fs +O cB ) Modified to Hdf i ＝dtRP i +CIO i -Hys_IUSHA i -dtRP s ；
Step 4-3:case5 condition Hdf will be met i Adjacent to > Off is included in candidate set CLL cnd In (a) and (b);
step 5: optimizing ping-pong switching;
step 5-1: the current terminal movement speed Vct is set, and clln= { Cell is set 1 ，…，Cell n Each Cell in } i Select out the condition Vct > Vap meeting Case4 i Set cso= { Cell j ，Cell j+1 …，Cell j+k-1 Calculation target set tao=cll } cnd -CSO；
Step 5-2: and selecting a neighbor cell with the minimum ping-pong handover rate from the TAO as a target cell for the handover.
Example 2:
in this embodiment, the present invention is specifically described by taking n=6, n=7, and the terminal speed vct=30 km/h as an example, and the conditions of the 5G cell related parameters are shown in table 1:
table 1
The base data are shown in table 2:
table 2
| Sequence number | Project | Data |
| 1 | Basic hysteresis Hysm (dBm) | 3 |
| 2 | Specific offset coefficient CIO ft | 3 |
| 3 | Switching minimum dwell time MTS (ms) | 320 |
| 4 | Residence time threshold theta MTS | 1.2 |
| 5 | Hysteresis threshold theta Hys | 1.2 |
| 6 | Hysteresis coefficient sigma Hys | 1.1 |
| 7 | A3 event cheating parameter Off | 0 |
The 5G cell switching method for improving the connection stability of the UDN, described in the embodiment, comprises the following steps: calculating the level offset of the signal, analyzing the disconnection rate, synthesizing the system hysteresis, correcting the A3 switching judgment, optimizing the ping-pong switching and the like;
step 1: accounting for signal level offset;
calculating the offset dRP of the signal level at the current moment and the cell transmitting power N ＝{dtRP s ，dtRP 1 ，…，dtRP n }＝{RSRP s -Rx s ，RSRP 1 -Rx 1 ，…，RSRP n -Rx n }＝{-161，-152，-158，-146，-158，-164，-154}dB；
Step 2: analyzing the disconnection rate;
primary serving Cell s Specific offset O of (2) cs Zero clearing; calculating the CIO of the specific offset of the adjacent cell i ＝CIO ft *COB j ＝CIO ft *exp((-1)*Drp i )＝{2.41，2.14，2.51，2.31，2.05，1.97}dBm；
Step 3: system hysteresis synthesis
{Cell 5 Meeting Case1 condition Mts i ≥θ MTS * MTS, calculating cell hysteresis Hys_IUSHA 5 ＝Hysm＝3dBm；
{Cell 3 ，Cell 6 MTS is less than or equal to Mts when meeting Case2 condition i ≤θ MTS * MTS, first calculate hysteresis slope X k ＝(1-θ Hys )*Hysm/(θ MTS -1) mts= -0.00938, calculating the hysteresis intercept Y b ＝Hysm-X k *θ MTS *MTS＝Hysm-(1-θ Hys )*Hysm/(θ MTS -1)*MTS*θ MTS *MTS＝Hysm-(1-θ Hys )*Hysm*θ MTS /(θ MTS -1)＝(θ MTS *θ Hys -1)*Hysm/(θ MTS -1) =6.6, then calculate
{Cell 1 ，Cell 2 ，Cell 4 Meeting Case3 condition Mts i < MTS, calculate->Total hysteresis Hys_IUSHA synthesis i ＝{3.98，4.32，3.51，4.29，3，3.55}dBm；
Step 4: corrected A3 switching judgment;
satisfy the following requirementsConditional neighbor candidate set CLL cnd ＝{Cell 1 ，Cell 2 ，Cell 3 ，Cell 4 ，Cell 6 }；
Step 5: optimizing ping-pong switching;
pick out that Case4 condition vct=30 > Vap is satisfied i Set cso=null, calculation target set tao=cll cnd -CSO＝CLL cnd ；
The ping-pong handover rate in the TAO set is {0.35,0.64,0.77,0.43,0.15}, and the neighbor Cell with the minimum ping-pong handover rate of 0.15 is selected most 6 As the target cell for the present handover.
Simulation experiment: the IUSHA method of the invention is used for carrying out MATLAB platform simulation under the opening state and the closing state, the target is sampled 7 times, and the obtained UDN simulation results under the moving speed of 30km/h are respectively shown in the accompanying figures 2-6.
As shown in fig. 2, the target serving Cell fails to switch at sample 4 when IUSHA algorithm is off, and after algorithm switch is turned on, a Cell with smaller ping-pong effect is selected 4 After that smoothly switch to Cell 1 ；
As shown in fig. 3, when the IUSHA algorithm is turned off, the level shift is not adopted to measure the A3 event, and for a non-macro cellular base station, the transmitting power is low, so that the non-macro cellular base station cannot become a switching target, and the level value of a candidate neighbor cell is raised;
as shown in fig. 4, when the IUSHA algorithm is turned on, the neighbor cell load average value is more prone to selecting cells with relatively high loads but without access difficulty for switching, so that the utilization rate of the whole system is effectively improved;
as shown in fig. 5, the handover delay is constant when the IUSHA algorithm is turned off, and cannot be adaptively adjusted according to the load, level and service condition of the neighbor cell;
as shown in fig. 6, the ping-pong switching effect, after switching on the IUSHA algorithm, the overall ping-ping switching rate is much lower than the state value when the algorithm is off.
The foregoing embodiments are provided for further explanation of the present invention and are not to be construed as limiting the scope of the present invention, and some insubstantial modifications and variations of the present invention, which are within the scope of the invention, will be suggested to those skilled in the art in light of the foregoing teachings.
Claims (7)
1. A5G cell switching method for improving the connection stability of UDN is characterized by comprising the following steps:
step one, calculating the level offset of the signal: adopting a level offset mode to replace the absolute value of the signal level, and calculating the offset of the signal level of each cell at the current moment and the cell transmitting power;
step two, analyzing the disconnection rate: setting basic hysteresis parameters and specific offset coefficients, and calculating basic offset and neighbor cell specific offset according to the disconnection rate;
step three, system hysteresis synthesis: setting a switching minimum residence time, a residence time threshold, a hysteresis threshold and a hysteresis coefficient, and calculating cell hysteresis under different conditions;
step four, corrected A3 switching judgment: the neighbor cells meeting the level offset requirement are included in the candidate set, so that switching is triggered; incorporating into the candidate set neighbor cells satisfying the Case5 condition A3 that the handover function is greater than the inexpensive parameter of the event;
step five, optimizing ping-pong switching: selecting a set meeting a Case4 condition, calculating a target set according to the set, and selecting a neighbor cell with the minimum ping-pong handover rate from the target set as a target cell for the handover; the Case4 condition is that the current terminal moving speed is greater than the maximum terminal speed.
2. The 5G Cell handover method for improving UDN connection stability according to claim 1, wherein the 5G Cell includes n=n+1 cells clln= { Cell s }∪CLLn＝{Cell s ，Cell 1 ，…，Cell n }；
Wherein, cell s Clln= { Cell for the primary serving Cell of the current mobile terminal 1 ，…，Cell n -is its neighbor; cell signal level { RSRP s ，RSRP 1 ，…，RSRP n Transmit power { Rx }, transmit power s ，Rx 1 ，…，Rx n Rate of dropped calls { Drp } 1 ，Drp 2 ，…，Drp n Cell handover average residence time { Mts }, cell handover average residence time { Mts { cell handover average residence time { Mts { cell handover average cell handover cell 1 ，Mts 2 ，…，Mts n Maximum terminal speed { Vap } for each base station to access 1 ，Vap 2 ，…，Vap n Ping pong handover rate { Pph } 1 ，Pph 2 ，…，Pph n }。
3. The method for 5G cell handover to improve UDN connection stability according to claim 1, wherein the first step includes: adopting a level offset mode to replace the traditional absolute value of signal level, and eliminating the signal level gap of different types of equipment in the UDN network; for each cell in the CLLN, calculating the offset of the signal level at the current moment and the cell transmission power
dRP N ＝{dtRP s ，dtRP 1 ，…，dtRP n }＝{RSRP s -Rx s ，RSRP 1 -Rx 1 ，…，RSRP n -Rx n }。
4. The method for 5G cell handover to improve UDN connection stability according to claim 1, wherein the second step comprises the following steps:
step 2-1: setting a basic hysteresis parameter Hysm and a specific offset coefficient CIO ft ；
Step 2-2: primary serving Cell s Specific offset O of (2) cs Zero clearing; for neighbor clln= { Cell 1 ，…，Cell n Each Cell in } i Calculate the base offset COB i ＝exp((-1)*Drp i ) Wherein exp (·) is a natural exponential function; calculating the CIO of the specific offset of the adjacent cell i ＝CIO ft *COB i ＝CIO ft *exp((-1)*Drp i )。
5. The method for 5G cell handover for improving UDN connection stability according to claim 1, wherein the third step comprises the following steps:
step 3-1: setting a switching minimum dwell time MTS and a dwell time threshold theta MTS Hysteresis threshold theta Hys Hysteresis coefficient sigma Hys ；
Step 3-2: for clln= { Cell 1 ，…，Cell n Each Cell in } i If the Case1 condition Mts is satisfied i ≥θ MTS * MTS, calculating cell hysteresis Hys_IUSHA i =hysm; if the Case2 condition MTS is less than or equal to Mts i ≤θ MTS * MTS, first calculate hysteresis slope X k ＝(1-θ Hys )*Hysm/(θ MTS -1) MTS, calculating the hysteresis intercept
Y b ＝Hysm-X k *θ MTS *MTS＝Hysm-(1-θ Hys )*Hysm/(θ MTs -1)*MTS*θ MTS *MTS＝Hysm-(1-θ Hys )*Hysm*θ MTS /(θ MTS -1)＝(θ MTS *θ Hys -1)*Hysm/(θ MTS -1)
Then calculate
If Case3 condition Mts is satisfied i <MTS, calculation
6. The method for 5G cell handover for improving UDN connection stability according to claim 1, wherein the fourth step comprises:
step 4-1: a3 event M n +O fn +O cn -Hys＞M s +O fs +O cs +off indicates that the signal quality of the neighbor cell is better than the signal quality of the serving cell, thereby triggering handover; conversely, A3 satisfies the away state;
wherein M is n O, which is the measurement result of the neighboring cell fn For frequency-specific on adjacent cell frequencyOffset, O cn As for the specific offset of the adjacent cell, if the specific offset of the adjacent cell is not available, the specific offset is set to 0;
M s o, the measurement result of the serving cell fs O for a frequency specific offset on the serving cell frequency cs Hys is the hysteresis of the event and Off is the inexpensive parameter of the event for a particular offset of the serving cell;
step 4-2: for clln= { Cell 1 ，…，Cell n Each neighbor Cell in } i Will A3 switch function Hdf i ＝(M i +O fi +O ci -Hys i )-(M s +O fs +O cs ) Modified into
Hdf i ＝dtRP i +CIO i -Hys-IUSHA i -dtRP s ；
Step 4-3: case5 condition Hdf will be met i Adjacent to > Off is included in candidate set CLL cnd Is a kind of medium.
7. The method for 5G cell handover for improving UDN connection stability according to claim 1, wherein the fifth step comprises the following steps:
step 5-1: the current terminal movement speed Vct is set, and clln= { Cell is set 1 ，…，Cell n Each Cell in } i The set CSO= { Cell satisfying the Case4 condition Vct > Vapi is sorted out j ，Cell j+1 …，Cell j+n-1 Calculation target set tao=cll } cnd -CSO；
Step 5-2: and selecting a neighbor cell with the minimum ping-pong handover rate from the TAO as a target cell for the handover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111396577.5A CN114466424B (en) | 2021-11-23 | 2021-11-23 | 5G cell switching method for improving UDN connection stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111396577.5A CN114466424B (en) | 2021-11-23 | 2021-11-23 | 5G cell switching method for improving UDN connection stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114466424A CN114466424A (en) | 2022-05-10 |
| CN114466424B true CN114466424B (en) | 2023-07-21 |
Family
ID=81405625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111396577.5A Active CN114466424B (en) | 2021-11-23 | 2021-11-23 | 5G cell switching method for improving UDN connection stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114466424B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102474764A (en) * | 2009-07-09 | 2012-05-23 | 阿尔卡特朗讯公司 | Method of determining wireless hand off parameters |
| CN105282792A (en) * | 2015-09-16 | 2016-01-27 | 华信咨询设计研究院有限公司 | LTE cell switching method based on load coupling |
| CN105472639A (en) * | 2015-10-22 | 2016-04-06 | 杭州电子科技大学 | LTE handover optimization method based on power adjustment |
| CN105578546A (en) * | 2016-01-15 | 2016-05-11 | 华信咨询设计研究院有限公司 | Customer perception oriented sine self-adaptive LTE switching method |
| CN111343680A (en) * | 2020-03-02 | 2020-06-26 | 东南大学 | Switching time delay reduction method based on reference signal received power prediction |
| CN113038525A (en) * | 2021-03-12 | 2021-06-25 | 重庆邮电大学 | Cell pre-switching method in 5G system |
-
2021
- 2021-11-23 CN CN202111396577.5A patent/CN114466424B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102474764A (en) * | 2009-07-09 | 2012-05-23 | 阿尔卡特朗讯公司 | Method of determining wireless hand off parameters |
| CN105282792A (en) * | 2015-09-16 | 2016-01-27 | 华信咨询设计研究院有限公司 | LTE cell switching method based on load coupling |
| CN105472639A (en) * | 2015-10-22 | 2016-04-06 | 杭州电子科技大学 | LTE handover optimization method based on power adjustment |
| CN105578546A (en) * | 2016-01-15 | 2016-05-11 | 华信咨询设计研究院有限公司 | Customer perception oriented sine self-adaptive LTE switching method |
| CN111343680A (en) * | 2020-03-02 | 2020-06-26 | 东南大学 | Switching time delay reduction method based on reference signal received power prediction |
| CN113038525A (en) * | 2021-03-12 | 2021-06-25 | 重庆邮电大学 | Cell pre-switching method in 5G system |
Non-Patent Citations (1)
| Title |
|---|
| 李昊 ; 邓春红.面向5G异构网络的切换自优化算法研究.《重庆科技学院学报(自然科学版)》.2020,全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114466424A (en) | 2022-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Silva et al. | Adaptive hysteresis margin based on fuzzy logic for handover in mobile networks with dense small cells | |
| US9161277B2 (en) | Mobility control method mitigating inter cell interference and base stations which adopt the method | |
| EP2321998B1 (en) | Cell search and selection in a wireless communication system | |
| CN100362903C (en) | A method of hard switch between heterogeneous systems for WCDMA system | |
| Hussein et al. | A novel cell-selection optimization handover for long-term evolution (LTE) macrocellusing fuzzy TOPSIS | |
| He | A fuzzy logic based vertical handoff decision algorithm between WWAN and WLAN | |
| CN105682156B (en) | The adaptive LTE cell switching methods of Gaussian Profile based on load | |
| TWI566614B (en) | Method of performing cell reselection in wireless communication system | |
| Silva et al. | Self-tuning handover algorithm based on fuzzy logic in mobile networks with dense small cells | |
| JP2001169323A (en) | Mobile communication system, hand-over controller and its hand-over method | |
| CN103220688A (en) | Moving-load balancing method based on efficacy function in LTE (long term evolution) self-organized network | |
| KR100979204B1 (en) | Handover method and apparatus in mobile network | |
| Ba et al. | Load-aware cell select scheme for multi-connectivity in intra-frequency 5G ultra dense network | |
| Zhang et al. | A two-layer mobility load balancing in LTE self-organization networks | |
| Padmapriya et al. | Utility based Vertical Handoff Decision Model for LTE-A networks | |
| Hatipoğlu et al. | Handover-based load balancing algorithm for 5G and beyond heterogeneous networks | |
| CN114466424B (en) | 5G cell switching method for improving UDN connection stability | |
| Habibzadeh et al. | A novel handover decision-making algorithm for HetNets | |
| CN109982411B (en) | Method and device for selecting terminal access network and terminal thereof | |
| CN113923738B (en) | Switching method of 5G cell under UDN architecture and related device | |
| Patil et al. | An approach for optimization of handoff algorithm using fuzzy logic system | |
| Deswal et al. | A Vertical Handover Algorithm in Integrated Macrocell Femtocell Networks. | |
| CN105517056A (en) | Interlayer cascade load balancing method based on network mode switching in multi-mode mobile communication network | |
| Abd El-Fadeel et al. | C4. Vertical handoff in heterogeneous wireless networks with predictive SINR using GM (1, 1) | |
| Haddad et al. | A game theoretic approach for the association problem in two-tier HetNets |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |