CN107612602A - The wave beam restoration methods and device of millimeter-wave communication system - Google Patents
The wave beam restoration methods and device of millimeter-wave communication system Download PDFInfo
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Abstract
The invention provides the wave beam restoration methods and device of a kind of millimeter-wave communication system, methods described includes：When receiving the wave beam failure information of user terminal transmission, by current beam to switching to a wave beam pair of the specified beams to concentration successively, until the service quality QoS of the wave beam pair after switching is higher than predetermined threshold value；Wherein, the specified beams to the wave beam of concentration to by the wave beam pair to first area and the wave beam of the adjacent area of first area, to being screened to obtain, the first area refers to the user terminal region before wave beam failure.By the way that current beam to be switched to wave beam pair of the specified beams to concentration successively, wave beam recovery can be completed by only needing the switching of fewer number, relative to traditional restoration methods based on exhaustive search, the recovery latency and resource overhead needed for wave beam recovery are greatly reduced.
Description
Technical field
It is extensive more particularly, to a kind of wave beam of millimeter-wave communication system the present embodiments relate to communication technical field
Multiple method and device.
Background technology
With economic and society development, the trend of exponential increase is being presented for the demand of traffic rate by people.In the least
Metric wave is considered as Next-Generation Wireless Communication Systems (5G) key technology due to its abundant frequency spectrum resource.The ripple of millimeter wave frequency band
Length is shorter, and according to antenna theory, its antenna size is also smaller, and substantial amounts of antenna can be integrated in less region, is easy to lead to
Cross the high-transmission loss of beamforming technique compensation millimeter wave frequency band.
Consider an indoor millimeter-wave system, have a base station and a user, base station uses N number of directional beam, user
End uses M directional beam, in general there is M<<N, share M*N available wave beams pair.Base station and user terminal meet often respectively
Individual wave beam has the angular coverage of formed objects and different directions.The wall of surrounding can provide for wave beam to be reflected and brings
Certain reflection loss.Indoor wall can provide for wave beam to be reflected and brings certain reflection loss, when millimeter wave penetrates
Its material property can be depended on during indoor wall by certain decay that penetrates, attenuation degree.The link load of free routing can
Calculated with following formula：
Ploss=20lg (d)+PR+PT
Wherein, PlossLink load is represented, d represents path length, PRRepresent reflection loss, PTRepresent transmission loss.Due to
The path length of non-line of sight (Not Line of Sight, NLOS) is larger, therefore only considers the NLOS of first order reflection.It is indoor
Under the conditions of occur because path length is shorter line of sight (Line of Sight, LOS) probability it is larger, in sky under outdoor conditions
The probability that LOS footpaths occurs in spacious place is also larger.
In actual scene, currently used wave beam because of mobile human body to may block, the movement of user terminal, move
Fixed shelter is run into during dynamic and make it that its service quality (Quality of Service, QoS) is reduced to below threshold value,
Trigger wave beam failure.Now need to find the available beams pair for meeting QoS threshold condition again, also referred to as wave beam recovers.It is existing
Having technology typically using the wave beam restoration methods based on exhaustive search, could to complete wave beam to after extensive, it is necessary to search for M*N wave beam
It is multiple, it can bring higher recovery latency and expense under the scene for needing frequently to carry out wave beam recovery.
The content of the invention
The embodiments of the invention provide a kind of millimeter wave for overcoming above mentioned problem or solving the above problems at least in part
The wave beam restoration methods and device of communication system.
On the one hand the embodiments of the invention provide a kind of wave beam restoration methods of millimeter-wave communication system, methods described bag
Include：
S1, when receiving the wave beam failure information of user terminal transmission, by current beam to switching to specified beams successively
To a wave beam pair of concentration, until the service quality QoS of the wave beam pair after switching is higher than predetermined threshold value；
Wherein, the specified beams to the wave beam of concentration to passing through the adjacent of the wave beam pair to first area and first area
For the wave beam in region to being screened to obtain, the first area refers to the user terminal region before wave beam failure.
Wherein, before step S1, methods described also includes：
All wave beams pair of the first area are searched for, and obtain the qos value of all wave beams pair of the first area；
Using all wave beam centering qos value highest wave beams of the first area to the line of sight as the first area
LOS wave beams pair, and using the high wave beam of all wave beam centering qos values of the first area time to as the non-of the first area
Line of sight NLOS wave beams pair；
The LOS wave beams of the first area are obtained to numbering with the NLOS wave beams of the first area to numbering, and by institute
The LOS wave beams of first area are stated to numbering with the NLOS wave beams of the first area to the corresponding beam table of numbering deposit user terminal
In correspondence position；Have in beam table corresponding to the user terminal all areas LOS wave beams pair and NLOS wave beams to both
Numbering and corresponding relation.
Wherein, the specified beams are described by current beam pair to collecting the LOS wave beams pair including at least the first area
Specified beams are switched to successively to a wave beam of concentration to specifically including：
The LOS wave beams of the first area are obtained to numbering in beam table corresponding to the user terminal；
By the current beam to switching to the LOS wave beams of the first area to wave beam pair corresponding to numbering.
Wherein, the specified beams are described by current beam to collecting the NLOS wave beams pair including at least the first area
To switching to specified beams successively to a wave beam of concentration to specifically including：
The NLOS wave beams of the first area are obtained to numbering in beam table corresponding to the user terminal；
By the current beam to switching to the NLOS wave beams of the first area to wave beam pair corresponding to numbering.
Wherein, the specified beams are described by current beam pair to collecting the LOS wave beams pair including at least the adjacent area
Specified beams are switched to successively to a wave beam of concentration to specifically including：
Described in being obtained in beam table corresponding to the user terminal to numbering inquiry according to the LOS wave beams of the first area
The LOS wave beams of adjacent area are to numbering；
By the current beam to switching to the LOS wave beams of the adjacent area to wave beam pair corresponding to numbering.
Wherein, the specified beams are described by current beam to collecting the NLOS wave beams pair including at least the adjacent area
To switching to specified beams successively to a wave beam of concentration to specifically including：
Described in being obtained in beam table corresponding to the user terminal to numbering inquiry according to the LOS wave beams of the first area
The LOS wave beams of adjacent area are to numbering；
Described in being obtained in beam table corresponding to the user terminal to numbering inquiry according to the LOS wave beams of the adjacent area
The NLOS wave beams of adjacent area are to numbering；
By the current beam to switching to the NLOS wave beams of the adjacent area to wave beam pair corresponding to numbering.
Wherein, the adjacent area includes two regions, is divided into second area and the 3rd region, the second area and institute
The both sides that the 3rd region is located at the first area respectively are stated, the specified beams comprise at least to collection：The first area
LOS of the LOS wave beams to the NLOS wave beams of the, first area to the LOS wave beams of the, second area to, the 3rd region
Wave beam is to, NLOS wave beams pair of the second area and the NLOS wave beams pair in the 3rd region；It is described by current beam to according to
It is secondary to switch to specified beams to a wave beam of concentration to specifically including：
By current beam to switching to the NLOS wave beams of the LOS wave beams of the first area to, the first area successively
To the LOS wave beams of the, second area to the LOS wave beams in, the 3rd region to the NLOS wave beams pair of the, second area and
One wave beam pair of the NLOS wave beam centerings in the 3rd region.
On the other hand the embodiments of the invention provide a kind of wave beam recovery device of millimeter-wave communication system, described device bag
Include：
Handover module, for when receive user terminal transmission wave beam failure information when, by current beam to switching successively
A wave beam pair to specified beams to concentration, until the service quality QoS of the wave beam pair after switching is higher than predetermined threshold value；
Wherein, the specified beams to the wave beam of concentration to passing through the adjacent of the wave beam pair to first area and first area
For the wave beam in region to being screened to obtain, the first area refers to the user terminal region before wave beam failure.
On the other hand the embodiments of the invention provide a kind of computer program product, the computer program product includes depositing
The computer program on non-transient computer readable storage medium storing program for executing is stored up, the computer program includes programmed instruction, when described
When programmed instruction is computer-executed, the computer is set to perform the above method.
On the other hand the embodiments of the invention provide a kind of non-transient computer readable storage medium storing program for executing, the non-transient calculating
Machine readable storage medium storing program for executing stores computer instruction, and the computer instruction makes the computer perform the above method
The wave beam restoration methods and device of a kind of millimeter-wave communication system provided in an embodiment of the present invention, by the way that prewave will be worked as
Shu Yici switches to wave beam pair of the specified beams to concentration, it is only necessary to which the switching of fewer number can complete wave beam recovery, relatively
In traditional restoration methods based on exhaustive search, the recovery latency and resource overhead needed for wave beam recovery are greatly reduced.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the wave beam restoration methods of millimeter-wave communication system provided in an embodiment of the present invention；
Fig. 2 is the wave beam in a kind of millimeter-wave communication system provided in an embodiment of the present invention between base station and user terminal to signal
Figure；
Fig. 3 is wave beam restoration methods provided in an embodiment of the present invention and the required search based on exhaustive search restoration methods time
Several cumulative distribution function simulation curves；
Fig. 4 is wave beam restoration methods provided in an embodiment of the present invention and the required search based on exhaustive search restoration methods time
Several analogous diagrams；
Fig. 5 is a kind of structured flowchart of the wave beam recovery device of millimeter-wave communication system provided in an embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is explicitly described, it is clear that described embodiment be the present invention
Part of the embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of creative work is made, belongs to the scope of protection of the invention.
In millimeter-wave communication system, if base station uses N number of directional beam, N number of directional beam of base station is covered each by
One sector region, this N number of sector region form the border circular areas that a base station is the center of circle.Area described in the embodiment of the present invention
Domain refers both to the sector region that a directional beam of base station is covered, and repeats no more below.
Fig. 1 be a kind of millimeter-wave communication system provided in an embodiment of the present invention wave beam restoration methods flow chart, such as Fig. 1
Shown, methods described includes：S1, when receiving the wave beam failure information of user terminal transmission, by current beam to switching successively
A wave beam pair to specified beams to concentration, until the service quality QoS of the wave beam pair after switching is higher than predetermined threshold value；Its
In, the specified beams are to the wave beam of concentration to passing through the wave beam pair and the wave beam of the adjacent area of first area to first area
To being screened to obtain, the first area refers to the user terminal region before wave beam failure.
Wherein, the communication channel of base station and user terminal is divided into downlink communication channel and uplink communication channel, wave beam herein
Failure fails for the wave beam of downlink communication channel, and wave beam failure information can be fed back to base by user terminal by uplink communication channel
Stand.To ensure the connectivity of uplink communication channel, uplink communication channel can not use wave beam forming or using traditional
Low-frequency range carrier wave.Wave beam failure is judged by user terminal, judge wave beam failure foundation be between base station and the user terminal under
Whether the QoS of the current beam pair used in row communication channel is dropped to below predetermined threshold value.The selection of the predetermined threshold value and channel
Environment is relevant with transmission required signal-to-noise ratio SNR, while in view of the dynamic fluctuation of channel, can will determine that foundation is arranged to one
In the individual period, the QoS of the current beam pair is always below the predetermined threshold value.
Indoors millimeter-wave communication system and LOS wave beams to it is more when outdoor millimeter-wave communication system in, wave beam failure
Typically caused by three kinds of reasons：Current beam is to being blocked, user terminal is mobile or current beam moves to being blocked with user terminal
Dynamic collective effect.
Specifically, when wave beam failure occurs, the reason for wave beam fails can not be known in advance, therefore the embodiment of the present invention uses
Method be by the current beam to switching to wave beam pair of the specified beams to concentration successively, pass through obtain switching after wave beam
To QoS, judge whether the QoS of wave beam pair after switching be higher than predetermined threshold value, to determine whether to complete wave beam recovery.If cut
QoS after changing is higher than predetermined threshold value, then judges that completing wave beam recovers, and stops switching.If the QoS after switching is less than predetermined threshold value,
Then continue to switch to other wave beams pair of specified beams to concentration.
A kind of wave beam restoration methods of millimeter-wave communication system provided in an embodiment of the present invention, by by current beam successively
Switch to wave beam pair of the specified beams to concentration, it is only necessary to which the switching of fewer number can complete wave beam recovery, relative to tradition
The restoration methods based on exhaustive search, greatly reduce wave beam recover needed for recovery latency and resource overhead.
Based on above-described embodiment, before step S1, methods described also includes：
All wave beams pair of the first area are searched for, and obtain the qos value of all wave beams pair of the first area；
Using all wave beam centering qos value highest wave beams of the first area to the line of sight as the first area
LOS wave beams pair, and using the high wave beam of all wave beam centering qos values of the first area time to as the non-of the first area
Line of sight NLOS wave beams pair；
The LOS wave beams of the first area are obtained to numbering with the NLOS wave beams of the first area to numbering, and by institute
The LOS wave beams of first area are stated to numbering with the NLOS wave beams of the first area to the corresponding beam table of numbering deposit user terminal
In correspondence position；Have in beam table corresponding to the user terminal all areas LOS wave beams pair and NLOS wave beams to both
Numbering and corresponding relation.
Wherein, have in beam table corresponding to the user terminal all areas LOS wave beams pair and NLOS wave beams to both
Numbering and corresponding relation, the angle of arrival of the angle of departure for being numbered in base station of each wave beam pair and user terminal correspond.
Specifically, the idle period or data transmission period before wave beam failure occurs, base station will carry out periodic
Beam search determines the region in the beam table to determine the QoS of each wave beam pair in the region of active user end
LOS wave beams pair and corresponding NLOS wave beams pair, this process equivalent to periodic table is updated periodically search can
To ensure beam table all the time close to actual conditions.
Based on above-described embodiment, the specified beams are described to incite somebody to action to collecting the LOS wave beams pair including at least the first area
Current beam to switching to specified beams to a wave beam of concentration to specifically including successively：
The LOS wave beams of the first area are obtained to numbering in beam table corresponding to the user terminal；
By the current beam to switching to the LOS wave beams of the first area to wave beam pair corresponding to numbering.
Based on above-described embodiment, the specified beams are described to collecting the NLOS wave beams pair including at least the first area
By current beam to switching to specified beams successively to a wave beam of concentration to specifically including：
The NLOS wave beams of the first area are obtained to numbering in beam table corresponding to the user terminal；
By the current beam to switching to the NLOS wave beams of the first area to wave beam pair corresponding to numbering.
It is to be appreciated that when current beam be blocked cause wave beam to fail when, now the first area is the use
Family end is currently located region, and the LOS wave beams pair and NLOS wave beams of the user terminal region are to spatially often having one
Fixed differential seat angle, will not be blocked simultaneously, thus only need by the current beam to switch to the region LOS wave beams pair or
NLOS wave beams recover to wave beam can be achieved.
Specifically, as shown in Fig. 2 user terminal is in different zones, used LOS wave beams are to difference；In a certain region,
There is LOS wave beams pair and NLOS wave beams pair.Current beam is detected to being LOS wave beams pair or NLOS wave beams pair in base station.If
Current beam is to NLOS wave beams pair corresponding to being then switched to S for LOS wave beams, if current beam is to for NLOS wave beams pair
LOS wave beams pair corresponding to being then switched to, wherein, the corresponding relation between LOS wave beams pair and NLOS wave beams pair can be in wave beam
Found in table.
User terminal detects the QoS of the wave beam pair after switching and compared with predetermined threshold value.If the QoS of the wave beam pair after switching
More than predetermined threshold value, then user terminal passes through uplink communication channel and notifies base station end to stop switching, completes wave beam and recovers.If switching
For the QoS of wave beam pair afterwards still less than predetermined threshold value, it is extensive that user terminal by uplink communication channel notifies that base station end continues executing with wave beam
Multiple operation.
Based on above-described embodiment, the specified beams are described to incite somebody to action to collecting the LOS wave beams pair including at least the adjacent area
Current beam to switching to specified beams to a wave beam of concentration to specifically including successively：
Described in being obtained in beam table corresponding to the user terminal to numbering inquiry according to the LOS wave beams of the first area
The LOS wave beams of adjacent area are to numbering；
By the current beam to switching to the LOS wave beams of the adjacent area to wave beam pair corresponding to numbering.
It is to be appreciated that when due to user terminal movement cause wave beam to fail when, now the first area be occur ripple
The user terminal region before beam failure, user terminal are moved to adjacent area and current beam pair or the LOS of first area
Wave beam pair or NLOS wave beams pair, therefore need to switch to the current beam into the LOS wave beams pair or NLOS ripples of the adjacent area
Beam is to complete wave beam recovery, and general LOS wave beams are to the wave beam centering QoS highest wave beams pair for region, therefore by institute
State the LOS wave beams pair that current beam switches to the adjacent area.
Specifically, because user terminal from first area is moved to adjacent area, and current beam is to being still first area
Wave beam pair, so producing wave beam failure.Base station is according to the LOS wave beams of the first area to corresponding to numbering in the user terminal
The LOS wave beams for obtaining the adjacent area are inquired about in beam table to numbering, by the current beam to switching to the adjacent region
The LOS wave beams in domain to wave beam pair corresponding to numbering, will the current beam to switching to the LOS wave beams of the adjacent area
It is right.
User terminal detects the QoS of the wave beam pair after switching and compared with predetermined threshold value.If the QoS of the wave beam pair after switching
More than predetermined threshold value, then user terminal passes through uplink communication channel and notifies base station end to stop switching, completes wave beam and recovers.If switching
For the QoS of wave beam pair afterwards still less than predetermined threshold value, it is extensive that user terminal by uplink communication channel notifies that base station end continues executing with wave beam
Multiple operation.
Based on above-described embodiment, the specified beams are described to collecting the NLOS wave beams pair including at least the adjacent area
By current beam to switching to specified beams successively to a wave beam of concentration to specifically including：
Described in being obtained in beam table corresponding to the user terminal to numbering inquiry according to the LOS wave beams of the first area
The LOS wave beams of adjacent area are to numbering；
Described in being obtained in beam table corresponding to the user terminal to numbering inquiry according to the LOS wave beams of the adjacent area
The NLOS wave beams of adjacent area are to numbering；
By the current beam to switching to the NLOS wave beams of the adjacent area to wave beam pair corresponding to numbering.
It is to be appreciated that when due to current beam to be blocked with user terminal movement collective effect cause wave beam to fail when,
Then need the current beam switching to the NLOS wave beams of adjacent area to complete wave beam recovering.
Specifically, because user terminal from first area is moved to the LOS wave beams of adjacent area and adjacent area to being blocked,
And current beam fails to being still the wave beam pair of first area so producing wave beam.Base station is according to the LOS ripples of the first area
Beam inquires about the LOS wave beams for obtaining the adjacent area to numbering to numbering in beam table corresponding to the user terminal, and base station is again
The adjacent area is obtained to asking in beam table corresponding to numbering in the user terminal according to the LOS wave beams of the adjacent area
NLOS wave beams are to numbering, finally by the current beam to switching to the NLOS wave beams of the adjacent area to ripple corresponding to numbering
Beam pair, will the current beam to switching to the NLOS wave beams pair of the adjacent area.
User terminal detects the QoS of the wave beam pair after switching and compared with predetermined threshold value.If the QoS of the wave beam pair after switching
More than predetermined threshold value, then user terminal passes through uplink communication channel and notifies base station end to stop switching, completes wave beam and recovers.
Further, if the QoS of the wave beam pair after switching passes through uplink communication channel still less than predetermined threshold value, user terminal
Notice base station end continues executing with wave beam recovery operation.Base station end is by all wave beams to being carried out according to the access times in a period of time
Descending sort (sorting operation can be completed before wave beam unsuccessfully occurs), then it was not switched in descending search abovementioned steps
Wave beam pair, stopped search when the wave beam that searches is to meeting QoS threshold condition, complete wave beam and recover.
Based on above-described embodiment, the adjacent area includes two regions, is divided into second area and the 3rd region, and described
Two regions and the 3rd region are located at the both sides of the first area respectively, and the specified beams comprise at least to collection：It is described
The LOS wave beams of first area to the NLOS wave beams of the, first area to the LOS wave beams of the, second area to, the described 3rd
The LOS wave beams in region are to, NLOS wave beams pair of the second area and the NLOS wave beams pair in the 3rd region；It is described to incite somebody to action currently
Wave beam to switching to specified beams to a wave beam of concentration to specifically including successively：
By current beam to switching to the NLOS wave beams of the LOS wave beams of the first area to, the first area successively
To the LOS wave beams of the, second area to the LOS wave beams in, the 3rd region to the NLOS wave beams pair of the, second area and
One wave beam pair of the NLOS wave beam centerings in the 3rd region.
Wherein, in general, the wave beam number that base station uses is more, and the wave beam number that user terminal uses is less, user terminal
It is mobile can cause the change at Base Transmitter angle, and can seldom cause the change of user terminal angle of arrival.Uniform line is used in base station
Property antenna ULA in the case of, the LOS wave beams have the adjacent beams of 2 directions (change of the base station anglec of rotation), if base station is using equal
Even flat plane antenna UPA, the LOS wave beams have the adjacent beams of 8 directions (change of the anglec of rotation and the angle of pitch), but user terminal is past
It is past to move in only the horizontal direction without being moved in vertical direction, what the angle of pitch was usually fixed, therefore also need to only consider wherein 2
Adjacent beams on individual direction.
Specifically, according to exclude successively current beam to being blocked, user terminal is mobile and current beam to be blocked with
User terminal moves coefficient order and switched over.
Further, when the user terminal displacement, it is described by current beam to switching to specified beams pair successively
The wave beam concentrated is to specifically including：
By current beam to switching to the NLOS wave beams of the LOS wave beams of the first area to, the first area successively
One wave beam pair of the NLOS wave beam centerings to, LOS wave beams pair of the second area and the second area；Or
By current beam to switching to the NLOS wave beams of the LOS wave beams of the first area to, the first area successively
One wave beam pair of the NLOS wave beam centerings to, the LOS wave beams pair in the 3rd region and the 3rd region.
Specifically, user terminal has the process of displacement within the different periods.Wherein between base station and user terminal
Realize and represent user terminal in different zones, the LOS wave beams pair between base station and user terminal, dotted line represents user terminal in not same district
During domain, a plurality of NLOS wave beams pair between base station and user terminal.In this course, base station can compare the wave beam after switching to compiling
The wave beam used when number unsuccessfully occurring with wave beam is to the magnitude relationship of numbering, to determine base station end wave beam hair that user's moving belt comes
The change direction of firing angle, when user's displacement, the prediction switching when change direction can be recovered as wave beam next time
Direction.The number of switching can so be reduced so that it is smaller that wave beam recovers resource overhead.
Because periodic beam search can determine LOS and NLOS in active user region, therefore for passing
The wave beam restoration methods of system, when wave beam failure occurs, NLOS is first switched to, if being unsatisfactory for QoS requirement, then carried out poor
Search is lifted untill being switched to and meeting the wave beam of qos requirement.
Next the performance of traditional wave beam restoration methods and wave beam restoration methods provided by the present invention is contrasted：
Fig. 3 is required search of the wave beam restoration methods provided in an embodiment of the present invention with recovering machine method based on exhaustive search
The cumulative distribution function simulation curve of number, the average search number needed for two kinds of restoration methods are respectively 1.873 and 8.512,
Compared to traditional restoration methods, restoration methods proposed by the present invention can drop to searching times original 22%, drop significantly
Time delay and expense in low recovery process.
Fig. 4 is required search of the wave beam restoration methods provided in an embodiment of the present invention with recovering machine method based on exhaustive search
The analogous diagram of number, the searching times for the restoration methods that the embodiment of the present invention is provided largely are no more than 5 times, illustrate the recovery
The reason for method is successful in most cases, and searching times are more than 5 be probably LOS and NLOS and meanwhile be blocked, LOS not
In the presence of (being blocked by fixed shelter), history beam information inaccuracy etc..It can be noted that what is carried using the present invention simultaneously
Wave beam restoration methods are fewer than using the wave beam frequency of failure of traditional wave beam restoration methods, illustrate in the premise based on threshold value criterion
Under, the wave beam that the wave beam restoration methods of the invention carried are found is more likely optimal wave beam.
Fig. 5 is a kind of structured flowchart of the wave beam recovery device of millimeter-wave communication system provided in an embodiment of the present invention, such as
Shown in Fig. 5, described device includes handover module 1, wherein：
Handover module 1 is used for when receiving the wave beam failure information of user terminal transmission, by current beam to switching successively
A wave beam pair to specified beams to concentration, until the service quality QoS of the wave beam pair after switching is higher than predetermined threshold value；Its
In, the specified beams are to the wave beam of concentration to passing through the wave beam pair and the wave beam of the adjacent area of first area to first area
To being screened to obtain, the first area refers to the user terminal region before wave beam failure.
Specifically, when wave beam failure occurs, the reason for wave beam fails can not be known in advance, therefore the embodiment of the present invention uses
Method be by the current beam to switching to wave beam pair of the specified beams to concentration successively, pass through obtain switching after wave beam
To QoS, judge whether the QoS of wave beam pair after switching be higher than predetermined threshold value, to determine whether to complete wave beam recovery.If cut
QoS after changing is higher than predetermined threshold value, then judges that completing wave beam recovers, and stops switching.If the QoS after switching is less than predetermined threshold value,
Then continue to switch to other wave beams pair of specified beams to concentration.
A kind of wave beam recovery device of millimeter-wave communication system provided in an embodiment of the present invention, by by current beam successively
Switch to wave beam pair of the specified beams to concentration, it is only necessary to which the switching of fewer number can complete wave beam recovery, relative to tradition
The restoration methods based on exhaustive search, greatly reduce wave beam recover needed for recovery latency and resource overhead.
The embodiments of the invention provide a kind of computer program product, the computer program product is non-temporary including being stored in
Computer program on state computer-readable recording medium, the computer program include programmed instruction, when described program instructs
When being computer-executed, computer is able to carry out the method that above-mentioned each method embodiment is provided, such as including：When receiving use
During the wave beam failure information that family end is sent, by current beam to switching to a wave beam pair of the specified beams to concentration successively, directly
The service quality QoS of wave beam pair after to switching is higher than predetermined threshold value；Wherein, the specified beams to the wave beam of concentration to passing through
For the wave beam of the adjacent area of wave beam pair and first area to first area to being screened to obtain, the first area refers to ripple
The user terminal region before beam failure.
The embodiments of the invention provide a kind of non-transient computer readable storage medium storing program for executing, and the non-transient computer is readable to deposit
Storage media stores computer instruction, and the computer instruction makes the computer perform the side that above-mentioned each method embodiment is provided
Method, such as including：When receiving the wave beam failure information of user terminal transmission, by current beam to switching to specified beams successively
To a wave beam pair of concentration, until the service quality QoS of the wave beam pair after switching is higher than predetermined threshold value；Wherein, it is described to specify
Wave beam to the wave beam of concentration to by the wave beam pair to first area and the wave beam of the adjacent area of first area to screening
Obtain, the first area refers to the user terminal region before wave beam failure.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. the wave beam restoration methods of a kind of millimeter-wave communication system, it is characterised in that methods described includes：
S1, when receiving the wave beam failure information of user terminal transmission, by current beam to switching to specified beams successively to collection
In a wave beam pair, until the service quality QoS of wave beam pair after switching is higher than predetermined threshold value；
Wherein, the specified beams to the wave beam of concentration to passing through the wave beam pair and the adjacent area of first area to first area
Wave beam to being screened to obtain, the first area refer to wave beam failure before the user terminal region.
2. method according to claim 1, it is characterised in that before step S1, methods described also includes：
All wave beams pair of the first area are searched for, and obtain the qos value of all wave beams pair of the first area；
Using all wave beam centering qos value highest wave beams of the first area to the line of sight LOS as the first area
Wave beam pair, and using the high wave beam of all wave beam centering qos values of the first area time to as the non-straight of the first area
Up to footpath NLOS wave beams pair；
The LOS wave beams of the first area are obtained to numbering with the NLOS wave beams of the first area to numbering, and by described the
The LOS wave beams in one region are to numbering with the NLOS wave beams of the first area in the corresponding beam table of numbering deposit user terminal
Correspondence position；Have in beam table corresponding to the user terminal all areas LOS wave beams pair and NLOS wave beams to both volumes
Number and corresponding relation.
3. method according to claim 2, it is characterised in that the specified beams are to collecting including at least the first area
LOS wave beams pair, it is described by current beam to switching to specified beams successively to a wave beam of concentration to specifically including：
The LOS wave beams of the first area are obtained to numbering in beam table corresponding to the user terminal；
By the current beam to switching to the LOS wave beams of the first area to wave beam pair corresponding to numbering.
4. method according to claim 2, it is characterised in that the specified beams are to collecting including at least the first area
NLOS wave beams pair, it is described by current beam to switching to specified beams successively to a wave beam of concentration to specifically including：
The NLOS wave beams of the first area are obtained to numbering in beam table corresponding to the user terminal；
By the current beam to switching to the NLOS wave beams of the first area to wave beam pair corresponding to numbering.
5. method according to claim 2, it is characterised in that the specified beams are to collecting including at least the adjacent area
LOS wave beams pair, it is described by current beam to switching to specified beams successively to a wave beam of concentration to specifically including：
According to the LOS wave beams of the first area numbering inquiry is obtained in beam table corresponding to the user terminal described adjacent
The LOS wave beams in region are to numbering；
By the current beam to switching to the LOS wave beams of the adjacent area to wave beam pair corresponding to numbering.
6. method according to claim 2, it is characterised in that the specified beams are to collecting including at least the adjacent area
NLOS wave beams pair, it is described by current beam to switching to specified beams successively to a wave beam of concentration to specifically including：
According to the LOS wave beams of the first area numbering inquiry is obtained in beam table corresponding to the user terminal described adjacent
The LOS wave beams in region are to numbering；
According to the LOS wave beams of the adjacent area numbering inquiry is obtained in beam table corresponding to the user terminal described adjacent
The NLOS wave beams in region are to numbering；
By the current beam to switching to the NLOS wave beams of the adjacent area to wave beam pair corresponding to numbering.
7. method according to claim 2, it is characterised in that the adjacent area includes two regions, is divided into second area
With the 3rd region, the second area and the 3rd region are respectively positioned at the both sides of the first area, the specified beams
Collection is comprised at least：The LOS wave beams of the first area are to the NLOS wave beams of the, first area to, the second area
LOS wave beams are to the LOS wave beams in, the 3rd region to, NLOS wave beams pair of the second area and the 3rd region
NLOS wave beams pair；It is described by current beam to switching to specified beams successively to a wave beam of concentration to specifically including：
By current beam to switching to the LOS wave beams of the first area successively to the NLOS wave beams of the, first area to, institute
The LOS wave beams of second area are stated to the LOS wave beams in, the 3rd region to the NLOS wave beams pair of the, second area and described
One wave beam pair of the NLOS wave beam centerings in the 3rd region.
8. the wave beam recovery device of a kind of millimeter-wave communication system, it is characterised in that described device includes：
Handover module, for when receive user terminal transmission wave beam failure information when, by current beam to switching to finger successively
Standing wave beam is to a wave beam pair of concentration, until the service quality QoS of the wave beam pair after switching is higher than predetermined threshold value；
Wherein, the specified beams to the wave beam of concentration to passing through the wave beam pair and the adjacent area of first area to first area
Wave beam to being screened to obtain, the first area refer to wave beam failure before the user terminal region.
9. a kind of computer program product, it is characterised in that the computer program product includes being stored in non-transient computer
Computer program on readable storage medium storing program for executing, the computer program include programmed instruction, when described program is instructed by computer
During execution, the computer is set to perform the method as described in claim 1 to 7 is any.
10. a kind of non-transient computer readable storage medium storing program for executing, it is characterised in that the non-transient computer readable storage medium storing program for executing is deposited
Computer instruction is stored up, the computer instruction makes the computer perform the method as described in claim 1 to 7 is any.
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