CN104684047B - Method and apparatus in heterogeneous communications network for finding cell - Google Patents
Method and apparatus in heterogeneous communications network for finding cell Download PDFInfo
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- CN104684047B CN104684047B CN201510067487.XA CN201510067487A CN104684047B CN 104684047 B CN104684047 B CN 104684047B CN 201510067487 A CN201510067487 A CN 201510067487A CN 104684047 B CN104684047 B CN 104684047B
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- cell
- user equipment
- cells
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Discovery/identification cell scheme that the present invention provides a kind of in heterogeneous communications network, the location information of position range information and estimated user equipment of the macro base station based on cell each in macrocell, judge whether user equipment has been approached some or multiple cells, if it is, dedicated signaling is then sent to user equipment, user equipment is based on dedicated signaling triggering search, to periodically search for the one or more cell.The present invention also provides the schemes of another discovery cell, user equipment based on it is received by macro base station broadcast each cell warning region position range information and this estimated user equipment location information, judge whether this user equipment has been approached some or multiple cells, if it is, search is triggered, then to periodically search for the one or more cell.The present invention can efficiently have found/identify the cell in heterogeneous communications network in the case where saving the power consumption of user equipment.
Description
The application be on July 7th, 2011 propose application No. is 201110190014.0 it is entitled " in heterogeneous communications
The divisional application of the patent application of method and apparatus in network for finding cell ".
Technical field
This application involves slight for finding in heterogeneous communications network (HetNet) more particularly to heterogeneous communications network
The method and apparatus in area.
Background technique
Existing closed user group (closed subscriber group, CGS) cell discovery/identifying schemes are to be based on
Image processor function (autonomous search function, ASF) and close instruction (proximity
Indication) this mechanism is realized, important target first is that reducing the power consumption of user equipment.In this scenario, it uses
Family equipment side is stored with a white list (white list), includes limited quantity associated there on the white list
CGS cell cell ID (cell ID), in addition, being also stored with the CGS of limited quantity associated there in user equipment
The information of cell, such as position range information, wireless footprint (radio fingerprint) information etc..User equipment is according to institute
The position range information of the CGS cell of the limited quantity associated there of storage and the position of this estimated user equipment
Information etc. determines this user equipment whether close to one or more CGS cells on its white list, if it is, triggering
Search, to periodically search for all CGS cells on white list.In search process, user equipment is by white
The upper strongest cell of the signal strength that it is measured of list is determined as target CGS cell, and sends one close to being indicated to macro base
It stands, switches over preparation for triggering the macro base station, wherein this includes the cell ID of target CSG cell close in instruction.
Existing CGS cell discovery/recognition methods be based on user equipment only it is associated with the CGS cell of limited quantity this
One is true.Therefore, user equipment can remember the information of CGS cell associated there, such as location information, wireless footprint letter
Breath etc..However, due to its substantial amounts, user equipment can not for public picocell (public pico cell)
The information of all these public picocells can be stored, therefore, existing CGS cell finds scheme and is not suitable for public pico-
Discovery/identification of cell.
Currently, discovery/identification of public picocell is merely by exhaustive search (exhaustive search) mode
It realizes, which results in the power consumptions of higher user equipment.Accordingly, it is desirable to provide a kind of scheme for being able to solve the technical problem.
Summary of the invention
In view of the above-mentioned problems, being provided a kind of in the macro base station of heterogeneous communications network in the first aspect of the present invention
The method for finding cell for assisting user equipment, which is characterized in that the described method comprises the following steps: a. is based on being stored
The macrocell in all cells position range information and the estimated user equipment location information, sentence
Whether the user equipment that breaks has been approached the region including one or more cells；B. if the user equipment has connect
The nearly region then sends dedicated signaling to the user equipment, and for informing the user equipment, it has been approached the region,
It wherein include the cell ID of one or more of cells in the region in the dedicated signaling；C. it receives and comes from institute
The confirmation instruction for switching over preparation for triggering this macro base station of user equipment is stated, and is switched over based on confirmation instruction
Prepare, wherein the confirmation instruction includes the cell ID of target cell, the target cell is the institute in the region
State the strongest cell of signal strength that user equipment described in one or more cells measures.
And provide a kind of method in the user equipment of heterogeneous communications network for finding cell, feature
Be, the described method comprises the following steps: A., which is received, is used to inform this user equipment that it to have been approached one from the macro base station
A includes the dedicated signaling in the region of one or more cells, wherein including one in the region in the dedicated signaling
Or the cell ID of multiple cells；B. the dedicated signaling, triggering search, to periodically search in the region are based on
One or more of cells；C. confirmation instruction is sent to the macro base station, switches over standard for triggering the macro base station
It is standby, wherein including the cell ID of target cell in the confirmation instruction, the target cell is the institute in the region
State the strongest small cell of signal strength that this user equipment measures in one or more cells.
In the second aspect of the present invention, provide it is a kind of in the macro base station of heterogeneous communications network for assisting user to set
Preparation shows the method for cell, which is characterized in that the user equipment is stored with the cell mark of all cells frequently accessed
Knowledge and position range information, the described method comprises the following steps: m. is based on all cells in the macrocell stored
Position range information and the estimated user equipment location information, judge whether the user equipment has been approached one
A includes the region of one or more cells；N. if the user equipment has been approached the region, judge the region
In one or more of cells whether all belong to the small cell that the user equipment frequently accesses；O. if it is not, then
Dedicated signaling is sent to the user equipment, it has been approached the region for informing the user equipment, wherein described dedicated
It include the non-frequent visit of one or more in the region other than the cell that the user equipment frequently accesses in signaling
Ask the cell ID of cell；P. it receives and is used to trigger the confirmation that this macro base station switches over preparation from the user equipment
Instruction, and preparation is switched over based on confirmation instruction, wherein the confirmation instruction includes the cell ID of target cell,
The target cell is strong for the signal that user equipment described in one or more of cells in the region measures
Spend strongest cell.
And provide a kind of method in the user equipment of heterogeneous communications network for finding cell, feature
It is, the user equipment is stored with the cell ID and position range information of all cells frequently accessed, the method
The following steps are included: position range information and estimated this use of the M. based on the cell frequently accessed stored
The location information of family equipment judges the small cells whether this user equipment frequently accesses close to one or more；N. if this use
Family equipment has been approached one or more of cells frequently accessed, then triggers search, described all to periodically search for
The cell frequently accessed；O. it sends confirmation to indicate to the macro base station, switches over preparation for triggering the macro base station,
Described in confirmation instruction in include target cell cell ID, the target cell be it is described it is all frequently access it is small
The strongest small cell of the signal strength that this user equipment measures in cell.
Optionally, further comprising the steps of before the step O: to receive and be used to inform this user from the macro base station
It has been approached the dedicated signaling that one includes the region of one or more cells to equipment, wherein including institute in the dedicated signaling
State in region that the one or more other than the cell that the user equipment frequently accesses is non-frequently to access the small of cell
Area's mark；Based on the dedicated signaling, triggering search, to periodically search for one or more of non-frequencies in the region
Numerous access cell；Wherein the step O includes: to send confirmation instruction to the macro base station, for trigger the macro base station into
Row switching prepares, wherein including the cell ID of target cell in the confirmation instruction, the target cell is the institute
There are one or more of non-this user equipment that frequently access in cell in the cell frequently accessed and the region to survey
The strongest cell of the signal strength measured.
In the third aspect of the present invention, provide a kind of slight for finding in the user equipment of heterogeneous communications network
The method in area, which is characterized in that the described method comprises the following steps: warning region of the i. based on acquired all cells
The location information of position range information and this estimated user equipment, judges whether this user equipment has been approached one and include
The region of one or more cells, wherein the coverage area in the warning region in the slight area is more than or equal to the cell
Normal coverage areas；Ii. if this user equipment has been approached the region, search is triggered, to periodically search for the area
One or more of cells in domain；Iii. confirmation instruction is sent to macro base station, is cut for triggering the macro base station
Preparation is changed, wherein including the cell ID of target cell in the confirmation instruction, the target cell is in the region
One or more of cells in the strongest small cell of signal strength that measures of this user equipment.
And it provides and a kind of finds cell for assisting user equipment in the macro base station of heterogeneous communications network
Method, which is characterized in that the described method comprises the following steps: I. broadcast in this macro base station coverage area it is all have turned on it is slight
The position range information in the warning region in area, wherein the coverage area in the warning region in the slight area is more than or equal to described slight
The normal coverage areas in area；II. it receives and is used to trigger the confirmation that this macro base station switches over preparation from the user equipment
Instruction, and preparation is switched over based on confirmation instruction, wherein the confirmation instruction includes the cell ID of target cell,
The target cell is strong for the signal that user equipment described in one or more of cells in the region measures
Spend strongest cell.
In the fourth aspect of the present invention, provide a kind of slight for finding in the user equipment of heterogeneous communications network
The method in area, which is characterized in that the described method comprises the following steps: x. receives the macro base station coverage area broadcasted by macro base station
The position range information in the warning region of interior all cells having turned on, wherein the covering model in the warning region in the slight area
Enclose the normal coverage areas more than or equal to the cell；Y. the alert zone based on received all cells having turned on
The position range information in domain, triggering search, with periodically search in the macro base station coverage area it is all have turned on it is slight
Area.
It should be noted that cell (small cell) herein includes but is not limited to: picocell (pico
Cell), millimicro cell (femto cell).
It, can be in the case where saving the power consumption of user equipment, efficiently by applying the technical scheme of the present invention
It was found that the cell in/identification heterogeneous communications network.In addition, the technical solution of above-mentioned second aspect is compared to above-mentioned first party
The technical solution in face, additionally it is possible to save the expense of signaling to a certain extent.
In addition, the present invention in one embodiment, provide it is a kind of in the macro base station of heterogeneous communications network for auxiliary
User equipment is helped to find the device of cell, which is characterized in that described device includes: the first judgment means, is deposited for being based on
The position range information of all cells in the macrocell of storage and the location information of the estimated user equipment,
Judge whether the user equipment has been approached the region including one or more cells；First sending device, for such as
User equipment described in fruit has been approached the region, then sends dedicated signaling to the user equipment, for informing that the user sets
Standby its has been approached the region, wherein including the small of one or more of cells in the region in the dedicated signaling
Area's mark；First receiving device switches over preparation for triggering this macro base station from the user equipment for receiving
Confirmation instruction, and preparation is switched over based on confirmation instruction, wherein the confirmation instruction includes the cell of target cell
Mark, the letter that the target cell measures for user equipment described in one or more of cells in the region
Number strongest cell of intensity.
The present invention in one embodiment, provides a kind of small for finding in the user equipment of heterogeneous communications network
The device of cell, which is characterized in that described device includes: the second reception device, is used for for receiving from the macro base station
Informing this user equipment, it has been approached the dedicated signaling that one includes the region of one or more cells, wherein the dedicated letter
It include the cell ID of one or more of region cell in order；First searcher, for based on described dedicated
Signaling, triggering search, to periodically search for one or more of cells in the region；Second sending device is used
In sending confirmation instruction to the macro base station, preparation is switched over for triggering the macro base station, wherein in confirmation instruction
Cell ID including target cell, the target cell are this in one or more of cells in the region
The strongest cell of the signal strength that user equipment measures.
Another embodiment provides a kind of in the macro base station of heterogeneous communications network for assisting use by the present invention
Family equipment finds the device of cell, which is characterized in that the user equipment is stored with the small of all cells frequently accessed
Area's mark and position range information, described device includes: the second judgment means, for based in the macrocell stored
The location information of the position range information of all cells and the estimated user equipment judges that the user equipment is
It is no to have been approached the region including one or more cells；Third judgment means, if connect for the user equipment
The nearly region, then it is frequent to judge whether one or more of cells in the region all belong to the user equipment
The cell of access；Third sending device is used for if it is not, then sending dedicated signaling to the user equipment, for informing
Stating user equipment, it has been approached the region, wherein including in the region in the dedicated signaling in addition to the user equipment frequency
The non-cell ID for frequently accessing cell of one or more except the cell of numerous access；Third reception device, for connecing
It receives and switches over the confirmation instruction of preparation for triggering this macro base station from the user equipment, and indicated based on the confirmation
Preparation is switched over, wherein the confirmation instruction includes the cell ID of target cell, the target cell is the area
The strongest small cell of the signal strength that user equipment described in one or more of cells in domain measures.
Another embodiment provides a kind of in the user equipment of heterogeneous communications network for finding by the present invention
The device of cell, which is characterized in that the user equipment is stored with cell ID and the position of all cells frequently accessed
Range information is set, described device includes: the 4th judgment means, for the position based on the cell frequently accessed stored
The location information for setting range information and this estimated user equipment judges the whether close one or more frequencies of this user equipment
The cell of numerous access；Second searcher one or more of frequently accesses if had been approached for this user equipment
Cell then triggers search, to periodically search for all small cells frequently accessed；4th sending device, for sending out
It send confirmation instruction to the macro base station, preparation is switched over for triggering the macro base station, wherein including in confirmation instruction
The cell ID of target cell, the target cell are this user equipment measurement in all cells frequently accessed
The strongest cell of the signal strength arrived.
Another embodiment provides a kind of in the user equipment of heterogeneous communications network for finding by the present invention
The device of cell, which is characterized in that described device includes: the 5th judgment means, for based on acquired all small cells
Warning region position range information and this estimated user equipment location information, judge this user equipment whether
It include the region of one or more cells close to one, wherein the coverage area in the warning region in the slight area is more than or equal to
The normal coverage areas of the cell；Third searcher triggers if having been approached the region for this user equipment
Search, to periodically search for one or more of cells in the region；5th sending device, for sending confirmation
Instruction switches over preparation for triggering the macro base station, wherein including target cell in confirmation instruction to macro base station
Cell ID, the target cell be the region in one or more of cells in this user equipment measure
The strongest cell of signal strength.
Another embodiment provides a kind of in the macro base station of heterogeneous communications network for assisting use by the present invention
Family equipment finds the device of cell, which is characterized in that described device includes: broadcaster, for broadcasting the covering of this macro base station
The position range information in the warning region of all cells having turned in range, wherein the warning region in the slight area is covered
Lid range is more than or equal to the normal coverage areas of the cell；4th reception device comes from the user equipment for receiving
For trigger this macro base station switch over preparation confirmation instruction, and based on the confirmation indicate switch over preparation, wherein
The confirmation instruction includes the cell ID of target cell, and the target cell is one or more in the region
The strongest cell of the signal strength that user equipment described in a cell measures.
The present invention In yet another embodiment, provide it is a kind of in the user equipment of heterogeneous communications network for finding
The device of cell, which is characterized in that described device includes: the 4th reception device, macro by this of macro base station broadcast for receiving
The position range information in the warning region of all cells having turned in base station range, wherein the warning in the slight area
The coverage area in region is more than or equal to the normal coverage areas of the cell；4th searcher, for based on received
All cells having turned on warning region position range information, triggering search, to periodically search for the macro base
All cells having turned in coverage area of standing.
Various aspects of the invention will be more clear by the explanation of embodiment in detail below.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention above-mentioned
And other features will become more apparent:
Fig. 1 is the network topological diagram according to the heterogeneous communications network of one embodiment of the present of invention；
Fig. 2 shows one embodiment according to the first aspect of the invention in heterogeneous communications network for finding
The method flow diagram of cell；
Fig. 3 show one embodiment according to the second aspect of the invention in heterogeneous communications network for finding
The method flow diagram of cell；
Fig. 4 show one embodiment according to the third aspect of the invention we in heterogeneous communications network for finding
The method flow diagram of cell；
Fig. 5 is the network topological diagram according to the heterogeneous communications network of another embodiment of the invention；
Fig. 6 show one embodiment according to the fourth aspect of the invention in heterogeneous communications network for finding
The method flow diagram of cell.
Same or similar attached drawing mark indicates same or similar component in attached drawing.
Specific embodiment
It should be noted that cell (small cell) herein includes but is not limited to: picocell (pico
Cell), millimicro cell (femto cell).
Below with reference to attached drawing, the present invention will be described in detail.
Fig. 1 shows the network topological diagram of heterogeneous communications network according to an embodiment of the invention.It is big in figure
Ellipse is macrocell MC, that is, the coverage area of macro base station (macro eNodeB) 10.It is deployed in macrocell MC multiple pico-
Cell (pico cell), for example, small ellipse picocell PC1, picocell PC2, picocell PC3 shown in figure.In figure
User equipment 20 is also shown, is moved in macrocell MC, to be switched between macrocell and each picocell.
It should be noted that in Fig. 1, although illustrating only 3 picocells PC1, PC2 and PC3 in macrocell MC,
But one with ordinary skill in the art would appreciate that the quantity of the picocell in macrocell MC is simultaneously unlimited in practical application
In 3, in addition, can also include multiple millimicro cells in macrocell MC.It is another it should be noted that in practical applications, it is macro
The number of user equipment in cell MC is not limited to 1.Therefore, Fig. 1 is merely illustrative target, does not constitute and protects to the present invention
Protect the limitation of range.
Fig. 2 shows one embodiment according to the first aspect of the invention in heterogeneous communications network for finding
The method flow diagram of cell.Referring to Fig. 2 and combine Fig. 1 to the first aspect of the present invention for finding the side of cell
Method is described.
In the present embodiment, the small of picocell PC1, PC2 and PC3 all in macrocell MC is stored in macro base station 10
Area's mark, position range information etc..In addition, macro base station 10 has locating user devices 20, namely the position of estimation user equipment 10
The ability of confidence breath.
Referring to Fig. 2, firstly, in the step s 21, macro base station 10 is based on all picocells in the macrocell MC stored
Whether the location information of the position range information of PC1, PC2 and PC3 and estimated user equipment 20, judge user equipment 20
The region including one or more picocells is had been approached, for example, macro base station 10 can periodically carry out the judgement.
If it is judged that display user equipment 20 has been approached such a region, such as user equipment 20 has been moved into and connects
Region where nearly picocell PC1 and PC2, then in step S22, macro base station 10 sends dedicated signaling (dedicated
Signaling) to user equipment 20, for informing user equipment 20, it has been approached the region where picocell PC1 and PC2.
It wherein include the cell ID of picocell PC1 and PC2 in the dedicated signaling.
Then, in step S23, user equipment 20 receives the dedicated signaling from macro base station 10, and is based on the dedicated letter
The cell ID of the picocell PC1 and PC2 that include in order, triggering search, to periodically search for picocell PC1 and PC2.
That is, user equipment 20 periodically measures the intensity of the signal from picocell PC1 and PC2, such as
Reference Signal Received Power (reference signal receiving power, RSRP) measurement is carried out, and by signal strength
That strongest picocell, such as picocell PC1 is as to be switched target cell slightly.
Then, in step s 24, user equipment 20 sends confirmation instruction (acknowledge indication) to macro base
It stands 10, switches over preparation for triggering macro base station 10.It include wherein target cell namely picocell in confirmation instruction
The cell ID of PC1.
Then, in step s 25, macro base station 10 receives the confirmation instruction from user equipment 20, and is referred to based on the confirmation
Show and switches over preparation.
Fig. 3 show one embodiment according to the second aspect of the invention in heterogeneous communications network for finding
The method flow diagram of cell.Referring to Fig. 3 and combine Fig. 1 to the second aspect of the present invention for finding the side of cell
Method is described.
In the present embodiment, be stored in 20 side of user equipment, user equipment 20 all its frequently access it is pico- small
The cell ID in area and position range information etc..For example, picocell PC1 and picocell PC3 is that user equipment 20 is frequently visited
The picocell asked, therefore, the information such as the cell ID of picocell PC1 and PC3 and position range information are stored in user
In equipment 20.In addition, user equipment 20 has the ability of the location information of estimation their own.
In 10 side of macro base station, the small of picocell PC1, PC2 and PC3 all in macrocell MC is stored in macro base station 10
Area's mark, position range information etc., and know the cell ID for the picocell that user equipment 20 frequently accesses.In addition, macro
Base station 10 has locating user devices 20, namely estimates the ability of the location information of user equipment 10.
Firstly, macro base station 10 is based on all picocell PC1, PC2 in the macrocell MC stored in step S31
With the position range information of PC3 and the location information of estimated user equipment 20, judge whether user equipment 20 has been approached
One region including one or more picocells, for example, macro base station 10 can periodically carry out the judgement.
If it is judged that display user equipment 20 has been approached such a region, such as user equipment 10 has been moved into and connects
Region where nearly picocell PC1 and PC2, then in step s 32, macro base station 10 judges the picocell PC1 in the region
The picocell that user equipment 20 frequently accesses whether is all belonged to PC2.
At the same time, since user equipment 20 has been moved into close to the region where picocell PC1 and PC2, Yong Hushe
Standby 20 according to the position range information of all picocells that it is frequently accessed namely picocell PC1 and PC3 that are stored with
And the location information of this estimated user equipment 20, judge that this user equipment 20 has been approached the picocell that it is frequently accessed
PC1, then at this point, in step S32 ', user equipment 20 triggering search, with periodically search for all its frequently access it is pico-
Cell namely picocell PC1 and PC3.
And in 10 side of macro base station, then immediately above-mentioned steps S32, in the present embodiment, due to pico- small in the region
Area PC2 is not belonging to the picocell that user equipment 20 frequently accesses, and therefore, in step S33, macro base station 10 sends dedicated signaling
It only include in this region in addition to picocell PC1 that user equipment 20 frequently accesses to user equipment 20, in the dedicated signaling
Except it is non-it is frequent access picocell PC2 cell ID, that is to say, that macro base station 10 pass through the area dedicated signaling Jin Jianggai
The cell ID for belonging to the non-picocell frequently accessed in domain is sent to user equipment 20.
Then, in step S34, user equipment 20 receives the dedicated signaling from macro base station 10, and is based on the dedicated letter
The cell ID for the picocell PC2 for including in order, triggering search, to periodically search for picocell PC2.
Based on the above-mentioned triggering searched for twice, user equipment 20 simultaneously frequently accesses picocell PC2 and all its
Picocell scan for, that is to say, that user equipment 20 periodically measure from picocell PC2 and it is all its frequently
The intensity of the signal of the picocell namely picocell PC1 and PC3 of access, such as carry out Reference Signal Received Power
(reference signal receiving power, RSRP) measurement, and by that strongest picocell of signal strength, example
If picocell PC1 is as to be switched target cell slightly.
Then, in step s 35, user equipment 20 sends confirmation instruction (acknowledge indication) to macro base
It stands 10, switches over preparation for triggering macro base station 10.It include wherein target cell namely picocell in confirmation instruction
The cell ID of PC1.
Then, in step S36, macro base station 10 receives the confirmation instruction from user equipment 20, and is referred to based on the confirmation
Show and switches over preparation.
It should be noted that in the present embodiment, if the one or more for including in the close region of user equipment 20
Picocell all belongs to its picocell frequently accessed, then, macro base station 10 will not send dedicated signaling, and user equipment
20 automatic trigger search, to periodically search for all picocells that it is frequently accessed.
Fig. 4 show one embodiment according to the third aspect of the invention we in heterogeneous communications network for finding
The method flow diagram of cell.Referring to Fig. 4 and combine Fig. 5 to the third aspect of the present invention for finding the side of cell
Method is described.
In the present embodiment, in 20 side of user equipment, user equipment 20 has the ability of the location information of estimation their own.
Further, since the mobility of user equipment 20 is usually very fast, therefore, in the present embodiment, to each picocell
Set the warning region (alert zone) of picocell, it is preferred that as shown in figure 5, the warning region AZ's of picocell covers
The region in dotted line in lid range namely Fig. 5 is greater than the normal coverage areas of picocell itself, so that user equipment
The picocell more can be successfully switched to when close to a certain picocell.Certainly, the warning region of picocell
Coverage area can also be equal to the normal coverage areas of picocell itself.
In 10 side of macro base station, be stored in macro base station 10 picocell all in macrocell MC cell ID and this
The position range information etc. in the warning region of Microcell slightly.Macro base station 10 can broadcast had turned in macrocell MC it is each pico-
The position range information in the warning region of cell, for example, macro base station 10 can be broadcasted periodically, or new whenever having
Picocell is broadcasted after opening.
Referring to Fig. 4, firstly, in step S41, macro base station 10 broadcasts all in 10 coverage area of this macro base station have turned on
The position range information in the warning region of picocell, for example, the position model in the warning region of picocell PC1, PC2 and PC3
Enclose information.
Then, in step S42, the position model in warning region of the user equipment 20 based on acquired all picocells
The location information for enclosing information and this estimated user equipment 20, judging whether this user equipment 20 has been approached one includes one
The region of a or multiple picocells.
Judgment result displays this user equipment 20 has been approached such a region, such as this user equipment 20 has been moved into and connects
Region where nearly picocell PC1 and PC2, then in step S43, the triggering search of user equipment 20, to periodically search for
Picocell PC1 and PC2.
That is, user equipment 20 periodically measures the intensity of the signal from picocell PC1 and PC2, such as
Reference Signal Received Power (reference signal receiving power, RSRP) measurement is carried out, and by signal strength
That strongest picocell, such as picocell PC1 is as to be switched target picocell.
Then, in step S44, user equipment 20 sends confirmation instruction to macro base station 10, for trigger macro base station 10 into
Row switching prepares.It wherein include target picocell namely the cell ID of picocell PC1 in confirmation instruction.
Then, in step S45, macro base station 10 receives the confirmation instruction from user equipment 20, and is referred to based on the confirmation
Show and switches over preparation.
It should be noted that In an alternative embodiment, can also be broadcasted pico- small by each picocell oneself
The position range information in the warning region in area.
Fig. 6 show one embodiment according to the fourth aspect of the invention in heterogeneous communications network for finding
The method flow diagram of cell.Referring to Fig. 6 and combine Fig. 5 to the fourth aspect of the present invention for finding the side of cell
Method is described.
In the present embodiment, user equipment 20 does not have the ability for estimating oneself location information, or can not accurately estimate
Count the location information of oneself, or cannot estimate the location information of oneself in a manner of saving power, therefore, it is impossible to using with it is upper
The identical mode of embodiment for stating the third aspect carries out discovery/identification of picocell.
In the present embodiment, referring to Fig. 6, firstly, macro base station 10 broadcasts 10 coverage area of this macro base station in step S61
The position range information in the warning region of interior all picocells having turned on, for example, the police of picocell PC1, PC2 and PC3
Show the position range information in region.
Then, in step S62, user equipment 20 receives institute in 10 coverage area of macro base station broadcasted by macro base station 10
There is the position range information in the warning region for the picocell having turned on.
Then, in step S63, alert zone of the user equipment 20 based on received all picocells having turned on
The position range information in domain, triggering search, with periodically search in 10 coverage area of macro base station it is all have turned on it is pico- small
Area.
In the present embodiment, since user equipment 20 is only in the warning region for the picocell for receiving macro base station broadcast
Position range information after, can just trigger search, that is to say, that when user equipment 20 enter one be not deployed with cell, example
Such as the macrocell of picocell and millimicro cell, then since the macro base station in the macrocell will not broadcast warning regional location model
Information is enclosed, therefore user equipment 20 will not trigger search, to save the power consumption of user equipment 20 to a certain extent.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, should not be by appointing in claim
What appended drawing reference is construed as limiting the claims involved.In addition, it will be evident that one word of " comprising " is not excluded for other elements or step
Suddenly, before the component "one" word is not excluded for including " multiple " element.The multiple element stated in claim to a product
It can be implemented through software or hardware by an element.The first, the second equal words are used to indicate names, and are not offered as appointing
What specific sequence.
Claims (6)
1. a kind of method in the user equipment of heterogeneous communications network for finding cell, which is characterized in that the side
Method the following steps are included:
I. the position range information in the warning region based on acquired all cells and this estimated user equipment
Location information, judges whether this user equipment has been approached the region including one or more cells, wherein described slight
The coverage area in the warning region in area is more than or equal to the normal coverage areas of the cell；
Ii. if this user equipment has been approached the region, search is triggered, described in periodically searching in the region
One or more cells, to periodically measure the signal strength of one or more of cells；
Iii. confirmation instruction is sent to macro base station, preparation is switched over for triggering the macro base station, wherein the confirmation indicates
In include target cell cell ID, the target cell be the region in one or more of cells in
The strongest cell of the signal strength that this user equipment measures.
2. a kind of method for finding cell for assisting user equipment in the macro base station of heterogeneous communications network, feature exist
In the described method comprises the following steps:
I. the position range information in the warning region of all cells having turned in this macro base station coverage area is broadcasted, wherein institute
The coverage area for stating the warning region of cell is more than or equal to the normal coverage areas of the cell；
II. it receives and switches over the confirmation instruction of preparation for triggering this macro base station from the user equipment, and be based on institute
It states confirmation instruction and switches over preparation, wherein the confirmation instruction includes the cell ID of target cell, the target is slight
Area is user equipment described in one or more of cells in the region based on the letter periodically searched for and measured
Number strongest cell of intensity.
3. a kind of method in the user equipment of heterogeneous communications network for finding cell, which is characterized in that the side
Method the following steps are included:
X. the position in the warning region of all cells having turned in the macro base station coverage area by macro base station broadcast is received
Range information, wherein the coverage area in the warning region in the slight area is more than or equal to the normal coverage areas of the cell；
Y. the position range information in the warning region based on received all cells having turned on, triggering search, with week
All cells having turned in the macro base station coverage area are searched for phase property, to periodically measure one or more
The signal strength of a cell.
4. a kind of device for being used to find cell in the user equipment of heterogeneous communications network, which is characterized in that the dress
It sets and includes:
5th judgment means, for the warning position range information in region based on acquired all cells and estimated
This user equipment location information, judge this user equipment whether have been approached one include one or more cells area
Domain, wherein the coverage area in the warning region in the slight area is more than or equal to the normal coverage areas of the cell；
Third searcher triggers search, if having been approached the region for this user equipment to periodically search for
One or more of cells in region are stated, so that the signal for periodically measuring one or more of cells is strong
Degree；
5th sending device indicates to macro base station for sending confirmation, switches over preparation for triggering the macro base station, wherein
It is described confirmation instruction in include target cell cell ID, the target cell be the region in it is one or
The strongest small cell of the signal strength that this user equipment measures in multiple cells.
5. a kind of device for finding cell for assisting user equipment in the macro base station of heterogeneous communications network, feature exist
In described device includes:
Broadcaster, the position range in the warning region for broadcasting all cells having turned in this macro base station coverage area
Information, wherein the coverage area in the warning region in the slight area is more than or equal to the normal coverage areas of the cell；
4th reception device, for receiving the confirmation for switching over preparation for triggering this macro base station from the user equipment
Instruction, and preparation is switched over based on confirmation instruction, wherein the confirmation instruction includes the cell ID of target cell,
The target cell is based on periodically search for user equipment described in one or more of cells in the region
And the strongest cell of signal strength measured.
6. a kind of device for being used to find cell in the user equipment of heterogeneous communications network, which is characterized in that the dress
It sets and includes:
4th reception device, for receiving all cells having turned in the macro base station coverage area by macro base station broadcast
The position range information in region is warned, wherein the coverage area in the warning region in the slight area is more than or equal to the cell
Normal coverage areas；
4th searcher, the position range letter for the warning region based on received all cells having turned on
Breath, triggering search, to periodically search for all cells having turned in the macro base station coverage area, thus periodically
Measure the signal strength of one or more of cells.
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| CN201510067487.XA CN104684047B (en) | 2011-07-07 | 2011-07-07 | Method and apparatus in heterogeneous communications network for finding cell |
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|---|---|---|---|
| CN201110190014.0A CN102869053B (en) | 2011-07-07 | For the method and apparatus finding small-cell in heterogeneous communications network | |
| CN201510067487.XA CN104684047B (en) | 2011-07-07 | 2011-07-07 | Method and apparatus in heterogeneous communications network for finding cell |
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| CN2655571Y (en) * | 2002-07-02 | 2004-11-10 | 交互数字技术公司 | Device for zone converting user equipment between UMTS and WLAN |
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