CN106211342B - A kind of small cell accessing method and terminal, base station - Google Patents
A kind of small cell accessing method and terminal, base station Download PDFInfo
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- CN106211342B CN106211342B CN201510217269.XA CN201510217269A CN106211342B CN 106211342 B CN106211342 B CN 106211342B CN 201510217269 A CN201510217269 A CN 201510217269A CN 106211342 B CN106211342 B CN 106211342B
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Abstract
The invention discloses a kind of small cell accessing methods, which comprises terminal is accessed the macro base station by accidental channel access process by macro base station, and the common channel information list of the micro-base station in itself coverage area is sent to the terminal by the macro base station；The macro base station notifies the micro-base station in the own range, listens to the uplink signal that the terminal is sent；The macro base station is held consultation with the one or more micro-base station in own range, determines the running time-frequency resource information for downlink synchronous pilot frequency for belonging to one or more than one micro-base station；One or more than one micro-base station is that the intensity of the uplink signal listened to meets the micro-base station of preset condition；The running time-frequency resource information is sent to corresponding terminal by the macro base station.The present invention also discloses a kind of base station and terminals.
Description
Technical field
The present invention relates to wireless communication technique more particularly to a kind of small cell accessing method and terminals, base station.
Background technique
With Universal Mobile Communication System (Universal Mobile Telecommunications System, UMTS)
The popularization and application of abbreviation technology, the wireless application of various high speeds are popularized.Masses are increasing for the demand of high data service.
30% business is about had according to some investigation results with the variation of the applied business of user as business constantly develops
Using generation in home area, and 35% or so business uses and occurs in indoor scenes such as company, restaurants.Therefore in-door covering
Quality will largely influence the business use feeling of user, and under these scenes, since conventional macro base station is generally adopted
With the 2.1GHz resource of frequency range, transmission loss and space loss are larger, weaker to the penetration capacity of building masonry wall, may cause room
The quality of interior covering is not fine.Similarly for hot spot region, such as shopping centre, the regions such as subway station, number is numerous, to communication
Be in great demand, due to the bus station position of macro base station and cost etc., also it is easy to appear capacity is limited, to influence
The business experience of user.In view of these situations, micro-base station solution is introduced into cope with this kind of scene, on the one hand to macro base station
On the other hand the supplement of covering shunts the business of macro network, to improve the quality of in-door covering and the business experience of user to subtract
The flow pressure of light macro net.
Micro-base station has the characteristics that transmission power is low, coverage area is small, small in size, flexible in application.Based on these features, phase
It, may there are a large amount of micro-base stations in regional area for macro base station networking model.There are a large amount of micro-base stations for regional area
Network be referred to as super-intensive network (Ultra Dense Network), the quantity of the micro-base station in super-intensive network and end
The quantity at end is suitable or even the quantity of micro-base station is greater than terminal quantity, will lead in this way between base station spacing very little (such as
<10m).Spacing very little between base station causes the region of base station overlapping covering to increase, and becomes more multiple so as to cause interference environment
It is miscellaneous, and the failure rate of mobility switching is higher.
Summary of the invention
In view of this, the embodiment of the present invention be solves the problems, such as it is existing in the prior art at least one and provide one kind it is slight
Area's cut-in method and terminal, base station can reduce the expense for periodically sending signaling, to improve the general of micro-base station suspend mode
Rate and system information is avoided to pollute.
The technical solution of the embodiment of the present invention is achieved in that
In a first aspect, the embodiment of the present invention provides a kind of small cell accessing method, which comprises
Terminal is accessed the macro base station by accidental channel access process by macro base station, itself is covered model by the macro base station
The common channel information list of micro-base station in enclosing is sent to the terminal；
The macro base station notifies the micro-base station in the own range, listens to the uplink signal that the terminal is sent；
The macro base station is held consultation with the one or more micro-base station in own range, and determination belongs to described one
The running time-frequency resource information for downlink synchronous pilot frequency of a or more than one micro-base station；One or more than one micro- base
Stand is that the intensity of the uplink signal listened to meets the micro-base station of preset condition；
The running time-frequency resource information is sent to corresponding terminal by the macro base station.
Second aspect, the embodiment of the present invention provide a kind of small cell accessing method, which comprises
Terminal itself will access the macro base station in itself affiliated range by accidental channel access process；
The terminal receives the common signal channel letter of the micro-base station in the macro base station coverage area that the macro base station is sent
Cease list；
The terminal receives the mark for the dominant micro-base station system information that the macro base station is sent, or sends out from micro-base station
The mark of the implicit micro-base station system information of the downlink synchronous pilot frequency acquisition of information sent；
The terminal determines that target is micro- according to the mark and the common channel information list of the micro-base station system information
Base station；
The terminal is based on target micro-base station described in the public access information access.
The third aspect, the embodiment of the present invention provide a kind of small cell accessing method, which comprises
Micro-base station listens to the uplink letter of the transmission of the terminal in itself coverage area based on the instruction of the macro base station belonging to itself
Number；
The micro-base station judges whether the uplink signal meets preset condition, obtains judging result；
When the judging result shows that the uplink signal meets preset condition, the micro-base station and the macro base station
It holds consultation, determines the running time-frequency resource information for descending pilot frequency for belonging to the micro-base station, to utilize the running time-frequency resource
Information and the terminal carry out information exchange.
Fourth aspect, the embodiment of the present invention provide a kind of macro base station, and the macro base station includes the first access unit, the first hair
Send unit, notification unit, the first determination unit and the second transmission unit, in which:
First access unit, for terminal to be accessed macro base station by accidental channel access process；
First transmission unit, for the common channel information list of the micro-base station in itself coverage area to be sent to
The terminal；
The notification unit listens to the uplink letter that the terminal is sent for notifying the micro-base station in the own range
Number
First determination unit, for holding consultation with the one or more micro-base station in own range, really
Surely belong to the running time-frequency resource information for downlink synchronous pilot frequency of one or more than one micro-base station；It is one or one
A above micro-base station is that the intensity of the uplink signal listened to meets the micro-base station of preset condition；
Second transmission unit, for pilot tone running time-frequency resource information to be sent to corresponding terminal.
5th aspect, the embodiment of the present invention provide a kind of terminal, and the terminal includes the second access unit, the second reception list
Member, third receiving unit or acquiring unit, the second determination unit and access unit, in which:
Second access unit, it is macro in itself affiliated range for itself will be accessed by accidental channel access process
Base station；
Second receiving unit, for receiving the micro-base station in the macro base station coverage area that the macro base station is sent
Common channel information list；
The third receiving unit, for receiving the mark for the dominant micro-base station system information that the macro base station is sent,
Alternatively, the acquiring unit, the micro-base station system information that the downlink synchronous pilot frequency acquisition of information for sending from micro-base station implies
Mark；
Second determination unit, for true according to the mark of micro-base station system information and the common channel information list
Set the goal micro-base station；
The access unit, for based on target micro-base station described in the public access information access.
6th aspect, the embodiment of the present invention provide a kind of micro-base station, the micro-base station include listen to unit, judging unit,
Third determination unit, in which:
It is described to listen to unit, the hair of the terminal in itself coverage area is listened to for the instruction based on the macro base station belonging to itself
The uplink signal sent；
The judging unit obtains judging result for judging whether the uplink signal meets preset condition；
The third determination unit, for when the judging result shows that the uplink signal meets preset condition,
It holds consultation with the macro base station and determines the running time-frequency resource information for downlink synchronous pilot frequency for belonging to each micro-base station, with convenience
Information exchange is carried out with the running time-frequency resource information and the terminal.
A kind of small cell accessing method provided in an embodiment of the present invention and terminal, base station, wherein macro base station by believing at random
Terminal is accessed the macro base station by road access process, and the macro base station believes the common signal channel of the micro-base station in itself coverage area
Breath list is sent to the terminal；The macro base station notifies the micro-base station in the own range, listens to what the terminal was sent
Uplink signal；The macro base station is held consultation with the one or more micro-base station in own range, is determined described in belonging to
The running time-frequency resource information for downlink synchronous pilot frequency of one or more micro-base station；It is one or more than one micro-
Base station is that the intensity of the uplink signal listened to meets the micro-base station of preset condition；The macro base station provides the time-frequency
Source information is sent to corresponding terminal；It so, it is possible to reduce the expense for periodically sending signaling, stop to improve micro-base station
The probability of dormancy and system information is avoided to pollute.
Detailed description of the invention
Fig. 1-1 is the interaction schematic diagram between macro base station and micro-base station in the related technology；
Fig. 1-2 is the implementation process schematic diagram of the small cell accessing method of the embodiment of the present invention one；
Fig. 2 is the implementation process schematic diagram of the small cell accessing method of the embodiment of the present invention two；
Fig. 3 is the composed structure schematic diagram of three macro base station of the embodiment of the present invention；
Fig. 4 is the composed structure schematic diagram of four terminal of the embodiment of the present invention；
Fig. 5 is the composed structure schematic diagram of five micro-base station of the embodiment of the present invention.
Specific embodiment
The 12nd version (3rd Generation of third generation partner program can be used under super-intensive network
Partnership Project Release 12,3GPP R12) control plane and service surface separation (C/U split) mode can
To be used to solve the problems, such as to point out in background above technology.Fig. 1-1 is the interaction between macro base station and micro-base station in the related technology
Schematic diagram, as Figure 1-1, terminal (User Equipment, UE) is by establishing unique wireless heterogeneous networks with macro base station
(Radio Resource Control, RRC) signaling connection, the data connection established in Lai Guanli micro-base station, this avoid
Signaling switching more than frequent third layer (L3) caused by cell is too small.Simultaneously because macro base station and micro-base station form overlapping
Covering can dynamically turn off micro-base station when loading lesser, avoid covering black hole and efficiency can be improved.
It can make the letter of radio resource control layer or more although with the mode that doubly-linked knot control plane and service surface separate
It enables switching reduce, but still falls within different cells between micro-base station and macro base station, need to broadcast different system informations, with
Convenient for cell identification, synchronization, accidental channel (RACH) access etc..Micro-base station public broadcasting is wide in a manner of different loop cycles
It broadcasts and send following information: PSS/SSS:2 times/10ms；MIB:1 times/40ms；SIB:1 times/80ms, 160ms/320ms etc., wherein
PSS indicates primary synchronization signal (Primary Synchronization Signal), and SSS indicates secondary synchronization signal (Secondary
Synchronization Signal), MIB indicates Master Information Block (Master Information Block), and SIB indicates system
Block of information (System Information Block).
Off the net intensively organizing, the neighboring BS information as present in system information block with (different) system is more, periodically wide
The mode broadcast system information pollution (System Information Pollution) easy to form, causes signal to add with interference and makes an uproar
Acoustic ratio (Signal to Interference plus Noise Ratio, SINR) is even if also not in the case where loading very low
Can be very high, so that it cannot modulation and coding strategy (Modulation and using higher (such as 256QAM or more)
Coding Scheme, MCS) so that throughput is affected.In addition the independent system information of periodic broadcast can also be led
Enable consumption is higher.
A kind of small cell accessing method, the main thought of this method will be provided in examples provided below of the present invention
It is: the system information list (common signal channel of all micro-base stations of the macro base station into macro base station coverage area described in terminal broadcast
Information list), the mark of micro-base station system information need to be only sent to itself institute by the micro-base station in the macro base station coverage area
Belong to macro base station, and pilot frequency information will be accessed with downlink and send terminal；The letter that last terminal is sent according to macro base station and micro-base station
Itself is linked into micro-base station by breath.Wherein, common channel information list includes the mark of micro-base station system information, Master Information Block
(MIB), the access informations such as system information block SIB, it includes primary synchronization signal/auxiliary synchronous signal that downlink, which accesses pilot frequency information,
(PSS/SSS) etc..It can be seen from the above description that downlink need to only be accessed pilot frequency information by micro-base station is sent to terminal, thus
The expense for periodically sending signaling is reduced, and then improves the probability of micro-base station suspend mode.
The technical solution of the present invention is further elaborated in the following with reference to the drawings and specific embodiments.
Embodiment one
The embodiment of the present invention provides a kind of small cell accessing method, and this method is applied to macro base station, the cell access side
The function that method is realized can realize that certain program code can be saved by the processor caller code in macro base station
In computer storage medium, it is seen then that the macro base station includes at least pocessor and storage media.
Fig. 1-2 is the implementation process schematic diagram of the small cell accessing method of the embodiment of the present invention one, and as shown in Figs. 1-2, this is small
Cell accessing method includes:
Step 101, terminal is accessed macro base station by accidental channel access process by macro base station；
Here, the accidental channel access process (RACH access process) refers to medium access control (Media Access
Control, MAC) layer control a Xiang Gongneng, it is idle in wireless heterogeneous networks (Radio Resource Control, RRC)
The terminal (User Equipment, UE) of state can establish connection, i.e. terminal by random access procedure and wireless network side
Wireless heterogeneous networks connection is established by random access procedure competition-based first, is connection status by idle state transition,
Then the connection for establishing data communication starts to carry out data communication.Here, the wireless network side mainly includes the nets such as macro base station
Network side apparatus.
Further, it is disposed jointly in macro base station and micro-base station and terminal is only established single wireless heterogeneous networks with micro-base station and connected
In the heterogeneous network connect, when within the coverage area that terminal is in micro-base station and macro base station, terminal is first on macro base station
Random access procedure competition-based is carried out, carries out random access procedure competition-based in micro-base station later.
Step 102, the macro base station is by the common channel information list (Common of the micro-base station in itself coverage area
Channel Information, CCI) it is sent to the terminal；
Here, the mark in common channel information list including micro-base station system information, Master Information Block (MIB), system letter
Cease access informations such as block (SIB)；In the related technology, the information such as Master Information Block, system information block in common channel information list
It is broadcast to terminal in a manner of different loop cycles by micro-base station, so that system information be caused to pollute；In the embodiment of the present invention,
When terminal accesses macro base station, common channel information list is sent to by the terminal by macro base station, can be effectively prevented from
The case where system information pollutes.
Step 103, the macro base station notifies the micro-base station in the own range, listens to the uplink letter that the terminal is sent
Number；
Here, the uplink signal includes uplink reference signals such as Sounding Reference Signal (Sounding
Reference Signal, SRS).
Step 104, the macro base station is held consultation with the one or more micro-base station in own range, is determined and is belonged to
In the running time-frequency resource information for downlink synchronous pilot frequency of one or more than one micro-base station；
Here, it is preset that one or more than one micro-base station is that the intensity of the uplink signal listened to meets
The micro-base station of condition；In step 103, the macro base station notifies the micro-base station in the own range, listens to the terminal hair
The uplink signal sent；Then, whether the intensity for the uplink signal that the micro-base station judgement within the scope of the macro base station listens to meets
Preset condition, when meeting preset condition, the micro-base station is held consultation with the macro base station, and determination belongs to the micro-base station
The running time-frequency resource information for descending pilot frequency, to utilize the running time-frequency resource information and the terminal to carry out information exchange.
Here, for the macro base station by holding consultation with the micro-base station in macro base station own range, micro- base is distributed in determination
It stands and is suitably used for the running time-frequency resource information of downlink synchronous pilot frequency；Wherein, the suitable meaning are as follows: used in different micro- stations
Running time-frequency resource information mutually staggers, so as to avoid interfering.
Step 105, running time-frequency resource information is sent to corresponding terminal by the macro base station.
In the embodiment of the present invention, the method also includes: the macro base station is also by the mark of dominant micro-base station system information
Knowledge is sent to corresponding terminal.
Here, the macro base station notifies the micro-base station in the own range, listens to the uplink signal that the terminal is sent
(such as reference signal), and negotiate to determine one or more micro-base station preferably accessed, wherein it is preferred that referring to signal strength
Meet preset condition.Macro base station is by the running time-frequency resource information of downlink synchronous pilot frequency and dominant micro-base station system information simultaneously
Mark is sent to terminal；It is dominant mean it is corresponding with implying, wherein the implicit meaning are as follows: the macro base station with it is preferably micro-
Base station determines the downlink synchronous pilot frequency for belonging to each micro-base station, and micro-base station system letter can be wherein implied in downlink synchronous pilot frequency
The mark of breath, such as PSS/SSS synchronizing sequence, in this case, the mark of the micro-base station system information referred to as implied.
In the embodiment of the present invention, terminal is accessed the macro base station by accidental channel access process by macro base station, described macro
The common channel information list of micro-base station in itself coverage area is sent to the terminal by base station；The macro base station notifies institute
The micro-base station in own range is stated, the uplink signal that the terminal is sent is listened to；One in the macro base station and own range
Or more than one micro-base station is held consultation, determination belongs to leading for down-going synchronous for one or more than one micro-base station
The running time-frequency resource information of frequency；One or more than one micro-base station is that the intensity of the uplink signal listened to meets in advance
If condition micro-base station；The running time-frequency resource information is sent to corresponding terminal by the macro base station；In this way, the present invention is implemented
The technical solution that example provides can reduce the expense for periodically sending signaling, to improve the probability of micro-base station suspend mode
With avoid system information from polluting.
Embodiment two
Very close, the optical-fibre channel based on the distance between macro base station and micro-base station under the following small base station super-intensive covering scene
Time delay and handle up close to ideal situation, therefore, may be considered between macro base station and micro-base station by the interaction of Xn interface
Relative ideal, that is, it is considered that no time delay and capacity are limited.On this basis, the present embodiment provides a kind of accesses of cell
Method, this method can be effectively reduced the Signalling exchange expense of wireless network side.
Fig. 2 is the implementation process schematic diagram of the small cell accessing method of the embodiment of the present invention two, as shown in Fig. 2, this method packet
It includes:
Step 201, terminal accesses macro base station by the RACH access process of standard；
Here, RACH access process refers to a Xiang Gongneng of media access control layer control, empty in wireless heterogeneous networks
The terminal of not busy state, can establish connection by random access procedure and wireless network side, i.e. terminal passes through first based on competition
Random access procedure establish wireless heterogeneous networks connection, by idle state transition be connection status, then establish data communication
Connection, start carry out data communication.
Step 202, terminal obtains the common channel information list of the micro-base station of macro base station covering region.
Here, for step 202 during specific implementation, terminal can request common channel information list to macro base station,
Then request of the macro base station based on terminal sends common channel information list to terminal；Certainly, macro base station can be with itself actively
Ground sends common channel information list to terminal.
Here, the mark in common channel information list including micro-base station system information, Master Information Block (MIB), system letter
Cease access informations such as block (SIB).
Step 203, macro base station notice micro-base station listens to the uplink signal of subsequent terminal transmission；
Here, uplink signal (such as uplink reference signals SRS etc.), there are two effects for downlink reference signal, wherein first
A effect is measured for down channel quality, and second effect estimates that terminal passes through downlink reference signal for down channel
Carry out relevant detection and demodulation.In step 203, since terminal is linked into micro-base station, the uplink that terminal is sent not yet
Signal refers to the interactive information between terminal and macro base station, and uplink signal may include Sounding Reference Signal (Sounding
Reference Signal, SRS) etc. information.
Here, the macro base station notifies the micro-base station in the own range, listens to the uplink signal that the terminal is sent,
And negotiate to determine one or more micro-base station preferably accessed.
The macro base station determines that the downlink synchronous pilot frequency for belonging to each micro-base station (can be implied with micro- with preferred micro-base station
The mark of base station system information, such as PSS/SSS synchronizing sequence), while macro base station believes the running time-frequency resource of downlink synchronous pilot frequency
Breath (or mark of dominant micro-base station system information) is sent to terminal.
Step 204, instruction of the micro-base station based on macro base station, the uplink signal sent to terminal are listened to；
Here, the instruction of the macro base station refers to that the instruction of macro base station notice micro-base station in step 203, the instruction are used for
Listen to the uplink signal of subsequent terminal transmission.
Step 205, micro-base station judges whether the uplink signal meets preset condition, obtains judging result；
Here, the preset condition can refer to any condition about uplink signal；During specific implementation,
Preset condition can be the intensity about uplink signal, at this point, step 205 are as follows: micro-base station judges the uplink signal
Whether intensity is more than or equal to preset threshold value, obtains judging result.
Step 206, when the judging result shows that the uplink signal meets preset condition, the micro-base station and institute
It states macro base station to hold consultation, the running time-frequency resource information for downlink synchronous pilot frequency for belonging to each micro-base station is determined, to utilize
The running time-frequency resource information and the terminal carry out information exchange；
Here, each micro-base station refers to that the intensity of the uplink signal received meets the micro-base station of preset condition.After
The continuous example accepted in step 205, when the intensity of the uplink signal is more than or equal to preset threshold value, the micro-base station with
The macro base station is held consultation, and the running time-frequency resource information for downlink synchronous pilot frequency for belonging to each micro-base station is determined, with convenience
Information exchange is carried out with the running time-frequency resource and the terminal.
Here, in step 206, micro-base station is held consultation with macro base station, is to distribute macro base station to micro-base station and close
The suitable running time-frequency resource information for downlink synchronous pilot frequency；Wherein, the mode of negotiation can be by between micro-base station and macro base station
Conventional signaling or message, wherein the suitable meaning are as follows: the running time-frequency resource used in different micro- stations mutually staggers, so as to
It enough avoids interfering.
Here, the functions such as Frequency Synchronization, time synchronization of the main downlink of downlink synchronous pilot frequency.
Step 207, macro base station obtains the mark of micro-base station system information, by the running time-frequency resource information and micro-base station system
The mark of information is sent to corresponding terminal；
Here, the mark of micro-base station system information can be what micro-base station carried during step 206 is negotiated.Having
During body is implemented, step 207 can be by macro base station and the RRC of terminal connection by the running time-frequency resource information and dominant
The mark of micro-base station system information informs terminal.
Here, in step 207, macro base station can not also send the mark of dominant micro-base station system information, therefore, it is desirable to
Micro-base station is implied with the mark of micro-base station system information in the downlink synchronous pilot frequency for being sent to terminal, and such terminal can also be from
The mark (mark of implicit micro-base station system information) of micro-base station system information is got in downlink synchronous pilot frequency, so that
Terminal obtains the mark of micro-base station system information.
Step 208, the terminal determines mesh according to the mark and the common channel information list of micro-base station system information
Mark micro-base station；
Here, the terminal is identified according to the micro-base station system information selects to meet item from public access information list
The public access information of part, and the corresponding micro-base station of the public access information is determined as target micro-base station
Here, due to including the access informations such as the mark of micro-base station system information in common channel information list, eventually
It end can be according to the related access information of the mark inquiry target micro-base station of micro-base station system information.
Step 209, the terminal is based on target micro-base station described in the public access information access.
Here, the public access information includes at least one of information: access lead, access running time-frequency resource, contention resolved
The information such as strategy.
In the embodiment of the present invention, the method also includes: the terminal receives the down-going synchronous that the macro base station is sent and leads
The running time-frequency resource information of frequency；The terminal receives the downlink that micro- station is sent according to the running time-frequency resource information of the downlink synchronous pilot frequency
Synchronizing pilot information, and down-going synchronous is completed according to the downlink synchronous pilot frequency information.
Here, the downlink synchronous pilot frequency is mainly used for the functions such as the Frequency Synchronization of downlink, time synchronization.
Here, the terminal receives the down-going synchronous that micro- station is sent according to the running time-frequency resource information of the downlink synchronous pilot frequency
Pilot frequency information, comprising: the terminal utilizes the running time-frequency resource information, receives the target micro-base station and is sent out using non-broadcastedly
The downlink synchronous pilot frequency information sent.
Here, described that down-going synchronous is completed according to the downlink synchronous pilot frequency information, comprising: to be led according to the down-going synchronous
Frequency information carries out downgoing time, frequency, sampling clock synchronization and uplink power estimation.
From the technical solution of the offer of embodiment two it can be seen that macro base station is into macro base station coverage area described in terminal broadcast
All micro-base stations common channel information list, the micro-base station in the macro base station coverage area only need to be by micro-base station system
The mark of information is sent to itself affiliated macro base station, and will access pilot frequency information with downlink and send terminal；Last terminal according to
Itself is linked into micro-base station by the information that macro base station and micro-base station are sent.It is led it can be seen that micro-base station need to only access downlink
Frequency information is sent to terminal, without the mode of broadcast transmission, to reduce the expense for periodically sending signaling, Jin Erti
The high probability of micro-base station suspend mode.
Embodiment three
Based on small cell accessing method above-mentioned, the embodiment of the present invention provides a kind of macro base station again, and first in macro base station
Access unit, the first transmission unit, the first determination unit and the second transmission unit can by the processor in macro base station come
It realizes；Certainly it can also be realized by specific logic circuit；During specific embodiment, processor can be central processing
Device (CPU), microprocessor (MPU), digital signal processor (DSP) or field programmable gate array (FPGA) etc..
Fig. 3 is the composed structure schematic diagram of three macro base station of the embodiment of the present invention, as shown in figure 3, the macro base station 300 includes the
One access unit 301, the first transmission unit 302, notification unit 303, the first determination unit 304 and the second transmission unit 305,
In:
First access unit 301, for terminal to be accessed macro base station by accidental channel access process；
First transmission unit 302, for sending out the common channel information list of the micro-base station in itself coverage area
Give the terminal；
The notification unit 303 listens to the uplink that the terminal is sent for notifying the micro-base station in the own range
Signal；
First determination unit 304, for holding consultation with the one or more micro-base station in own range,
Determine the running time-frequency resource information for downlink synchronous pilot frequency for belonging to one or more than one micro-base station；It is one or
More than one micro-base station is that the intensity of the uplink signal listened to meets the micro-base station of preset condition；
Second transmission unit 305, for pilot tone running time-frequency resource information to be sent to corresponding terminal.
In the embodiment of the present invention, the macro base station further includes third transmission unit, for also by dominant micro-base station system
The mark of information is sent to corresponding terminal.
In the embodiment of the present invention, terminal is accessed macro base station by accidental channel access process by the first access unit 301；The
The common channel information list of micro-base station in itself coverage area is sent to the terminal by one transmission unit 302；Notification sheet
Member 303 notifies the micro-base station in the own range, listens to the uplink signal that the terminal is sent；First determination unit 304 with
One or more micro-base station in own range is held consultation, and determination belongs to one or more than one micro-base station
The running time-frequency resource information for downlink synchronous pilot frequency；The running time-frequency resource information is sent to correspondence by the second transmission unit 305
Terminal；So, it is possible reduce periodically send signaling expense, thus improve micro-base station suspend mode probability and avoid be
System information pollution.
It need to be noted that: the description of the above macro base station embodiment, with above-mentioned small cell accessing method embodiment
Description be it is similar, there is with small cell accessing method embodiment similar beneficial effect, therefore do not repeat them here.For the present invention
Undisclosed technical detail in macro base station embodiment please refers to the description of the small cell accessing method embodiment of the present invention and understands,
To save length, therefore repeat no more.
Example IV
Based on small cell accessing method above-mentioned, the embodiment of the present invention provides a kind of terminal again, the second access in terminal
Unit, the second receiving unit, third receiving unit and the second determination unit can be realized by the processor in terminal；When
It can also so be realized by specific logic circuit；During specific embodiment, processor can be central processing unit, Wei Chu
Manage device, digital signal processor or field programmable gate array etc..
Fig. 4 is the composed structure schematic diagram of four terminal of the embodiment of the present invention, as shown in figure 4, the terminal 400 connects including second
Enter unit 401, the second receiving unit 402, third receiving unit 403 or acquiring unit 403, the second determination unit 404 and access
Unit 405, in which:
Second access unit 401, for itself will be accessed in itself affiliated range by accidental channel access process
Macro base station；
Second receiving unit 402, it is micro- in the macro base station coverage area that the macro base station is sent for receiving
The common channel information list of base station；
The third receiving unit 403, for receiving the mark for the dominant micro-base station system information that the macro base station is sent
Know, alternatively, the acquiring unit 403, the micro-base station system that the downlink synchronous pilot frequency acquisition of information for sending from micro-base station implies
The mark for information of uniting；
Second determination unit 404, for according to the mark of micro-base station system information and common channel information column
Table determines target micro-base station.
The access unit 405, for based on target micro-base station described in the public access information access.
In the embodiment of the present invention, the terminal further includes the 4th receiving unit and interactive unit, in which:
4th receiving unit, for receiving the running time-frequency resource information for the downlink synchronous pilot frequency that the macro base station is sent；
The interactive unit receives the downlink synchronous pilot frequency information that micro- station is sent for information, and same according to the downlink
It walks pilot frequency information and completes down-going synchronous.
In the embodiment of the present invention, the interactive unit includes receiving module and processing module, in which:
The receiving module uses non-broadcastedly for receiving the target micro-base station using the running time-frequency resource information
The downlink synchronous pilot frequency information of transmission；
The processing module, it is same for carrying out downgoing time, frequency, sampling clock according to the downlink synchronous pilot frequency information
Step and uplink power estimation.
In the embodiment of the present invention, second determination unit, for being identified according to the micro-base station system information from public
Selection meets the public access information of condition in access information list, and the corresponding micro-base station of the public access information is determined
For target micro-base station.
Here, the public access information includes at least one of information:
Access lead, access running time-frequency resource, contention resolved strategy.
It need to be noted that: the description of the above terminal embodiment, with retouching for above-mentioned small cell accessing method embodiment
It is similar for stating, and has with small cell accessing method embodiment similar beneficial effect, therefore do not repeat them here.For of the invention whole
Undisclosed technical detail in embodiment is held, the description of the small cell accessing method embodiment of the present invention is please referred to and understands, for section
About length, therefore repeat no more.
Embodiment five
Based on small cell accessing method above-mentioned, the embodiment of the present invention provides a kind of micro-base station, listening in micro-base station again
Unit, judging unit, third determination unit can be realized by the processor in micro-base station；It certainly can also be by specific
Logic circuit is realized；During specific embodiment, processor can be for central processing unit, microprocessor, at digital signal
Manage device or field programmable gate array etc..
Fig. 5 is the composed structure schematic diagram of five micro-base station of the embodiment of the present invention, as shown in figure 5, the micro-base station 500 includes detecing
Listen unit 501, judging unit 502 and third determination unit 503, in which:
It is described to listen to unit 501, the end in itself coverage area is listened to for the instruction based on the macro base station belonging to itself
Hold the uplink signal sent；
The judging unit 502 obtains judging result for judging whether the uplink signal meets preset condition；
The third determination unit 503, for showing that the uplink signal meets preset condition when the judging result
When, it holds consultation with the macro base station and determines the running time-frequency resource information for downlink synchronous pilot frequency for belonging to each micro-base station, with
Just information exchange is carried out using the running time-frequency resource information and the terminal.
It need to be noted that: the description of the above micro-base station embodiment, with above-mentioned small cell accessing method embodiment
Description be it is similar, there is with small cell accessing method embodiment similar beneficial effect, therefore do not repeat them here.For the present invention
Undisclosed technical detail in micro-base station embodiment please refers to the description of the small cell accessing method embodiment of the present invention and understands,
To save length, therefore repeat no more.
It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text mean it is related with embodiment
A particular feature, structure, or characteristic is included at least one embodiment of the present invention.Therefore, occur everywhere in the whole instruction
" in one embodiment " or " in one embodiment " not necessarily refer to identical embodiment.In addition, these specific features, knot
Structure or characteristic can combine in any suitable manner in one or more embodiments.It should be understood that in various implementations of the invention
In example, magnitude of the sequence numbers of the above procedures are not meant that the order of the execution order, the execution sequence Ying Yiqi function of each process
It can determine that the implementation process of the embodiments of the invention shall not be constituted with any limitation with internal logic.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.Apparatus embodiments described above are merely indicative, for example, the division of the unit, only
A kind of logical function partition, there may be another division manner in actual implementation, such as: multiple units or components can combine, or
It is desirably integrated into another system, or some features can be ignored or not executed.In addition, shown or discussed each composition portion
Mutual coupling or direct-coupling or communication connection is divided to can be through some interfaces, the INDIRECT COUPLING of equipment or unit
Or communication connection, it can be electrical, mechanical or other forms.
Above-mentioned unit as illustrated by the separation member, which can be or may not be, to be physically separated, aobvious as unit
The component shown can be or may not be physical unit；Both it can be located in one place, and may be distributed over multiple network lists
In member；Some or all of units can be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, each functional unit in various embodiments of the present invention can be fully integrated in one processing unit, it can also
To be each unit individually as a unit, can also be integrated in one unit with two or more units；It is above-mentioned
Integrated unit both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can store in computer-readable storage medium, which exists
When execution, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: movable storage device, read-only deposits
The various media that can store program code such as reservoir (Read Only Memory, ROM), magnetic or disk.
If alternatively, the above-mentioned integrated unit of the present invention is realized in the form of software function module and as independent product
When selling or using, it also can store in a computer readable storage medium.Based on this understanding, the present invention is implemented
Substantially the part that contributes to existing technology can be embodied in the form of software products the technical solution of example in other words,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
It is personal computer, server or network equipment etc.) execute all or part of each embodiment the method for the present invention.
And storage medium above-mentioned includes: various Jie that can store program code such as movable storage device, ROM, magnetic or disk
Matter.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (18)
1. a kind of small cell accessing method, which is characterized in that the described method includes:
Terminal is accessed the macro base station by accidental channel access process by macro base station, and the macro base station will be in itself coverage area
The common channel information list of micro-base station be sent to the terminal；
The macro base station notifies the micro-base station in the own range, listens to the uplink signal that the terminal is sent；
The macro base station is held consultation with the one or more micro-base station in own range, determine belong to it is one or
The running time-frequency resource information for downlink synchronous pilot frequency of more than one micro-base station；One or more than one micro-base station is
The intensity of the uplink signal listened to meets the micro-base station of preset condition；
The running time-frequency resource information is sent to corresponding terminal by the macro base station.
2. the method according to claim 1, wherein the method also includes:
The mark of dominant micro-base station system information is also sent to corresponding terminal by the macro base station.
3. a kind of small cell accessing method, which is characterized in that the described method includes:
Terminal itself will access the macro base station in itself affiliated range by accidental channel access process；
The terminal receives the common channel information column of the micro-base station in the macro base station coverage area that the macro base station is sent
Table；
The terminal receives the mark for the dominant micro-base station system information that the macro base station is sent, or sent from micro-base station
The mark of the implicit micro-base station system information of downlink synchronous pilot frequency acquisition of information；The micro-base station is the uplink letter listened to
Number intensity meet the micro-base station of preset condition；
The terminal determines target micro-base station according to the mark and the common channel information list of the micro-base station system information；
The terminal is based on target micro-base station described in public access information access.
4. according to the method described in claim 3, it is characterized in that, the method also includes:
The terminal receives the running time-frequency resource information for the downlink synchronous pilot frequency that the macro base station is sent；
The terminal receives the downlink synchronous pilot frequency information that micro- station is sent according to the running time-frequency resource information of the downlink synchronous pilot frequency,
And down-going synchronous is completed according to the downlink synchronous pilot frequency information.
5. according to the method described in claim 4, it is characterized in that, the terminal is provided according to the time-frequency of the downlink synchronous pilot frequency
Source information receives the downlink synchronous pilot frequency information that micro- station is sent, comprising:
The terminal utilizes the running time-frequency resource information, and it is same to receive the downlink that the target micro-base station is sent using non-broadcastedly
Walk pilot frequency information；
It is described according to the downlink synchronous pilot frequency information complete down-going synchronous, comprising: according to the downlink synchronous pilot frequency information into
Row downgoing time, frequency, sampling clock are synchronous and uplink power is estimated.
6. according to the described in any item methods of claim 3 to 5, which is characterized in that the terminal is according to the micro-base station system
The mark of information and the common channel information list determine target micro-base station, comprising:
The terminal identifies the selection from public access information list according to the micro-base station system information and meets the public of condition
Access information, and the corresponding micro-base station of the public access information is determined as target micro-base station.
7. according to the described in any item methods of claim 3 to 5, which is characterized in that the public access information includes at least letter
One of breath:
Access lead, access running time-frequency resource, contention resolved strategy.
8. a kind of small cell accessing method, which is characterized in that the described method includes:
Micro-base station listens to the uplink signal of the transmission of the terminal in itself coverage area based on the instruction of the macro base station belonging to itself；
The micro-base station judges whether the uplink signal meets preset condition, obtains judging result；
When the judging result shows that the uplink signal meets preset condition, the micro-base station and the macro base station are carried out
Negotiate, determine the running time-frequency resource information for descending pilot frequency for belonging to the micro-base station, to utilize the running time-frequency resource information
Information exchange is carried out with the terminal.
9. according to the method described in claim 8, it is characterized in that, the micro-base station to judge whether the uplink signal meets pre-
If condition, obtain judging result, comprising:
The micro-base station judges whether the intensity of the uplink signal is more than or equal to preset threshold value, obtains judging result.
10. method according to claim 8 or claim 9, which is characterized in that the uplink signal includes channel detection with reference to letter
Number.
11. a kind of macro base station, which is characterized in that the macro base station includes the first access unit, the first transmission unit, notification sheet
Member, the first determination unit and the second transmission unit, in which:
First access unit, for terminal to be accessed macro base station by accidental channel access process；
First transmission unit, it is described for the common channel information list of the micro-base station in itself coverage area to be sent to
Terminal；
The notification unit listens to the uplink signal that the terminal is sent for notifying the micro-base station in the own range；
First determination unit determines and belongs to for holding consultation with the one or more micro-base station in own range
In the running time-frequency resource information for downlink synchronous pilot frequency of one or more than one micro-base station；It is one or one with
On micro-base station be that the intensity of the uplink signal listened to meets the micro-base station of preset condition；
Second transmission unit, for pilot tone running time-frequency resource information to be sent to corresponding terminal.
12. macro base station according to claim 11, which is characterized in that the macro base station further includes third transmission unit, is used
In the mark of dominant micro-base station system information is also sent to corresponding terminal.
13. a kind of terminal, which is characterized in that the terminal includes the second access unit, the second receiving unit, third receiving unit
Or acquiring unit, the second determination unit and access unit, in which:
Second access unit, for the macro base in itself affiliated range itself will to be accessed by accidental channel access process
It stands；
Second receiving unit, for receiving the public affairs of the micro-base station in the macro base station coverage area that the macro base station is sent
Channel information list altogether；
The third receiving unit, for receiving the mark for the dominant micro-base station system information that the macro base station is sent, alternatively,
The acquiring unit, the mark for the micro-base station system information that the downlink synchronous pilot frequency acquisition of information for sending from micro-base station implies
Know；The micro-base station is that the intensity of the uplink signal listened to meets the micro-base station of preset condition；
Second determination unit, for determining mesh according to the mark and the common channel information list of micro-base station system information
Mark micro-base station；
The access unit, for based on target micro-base station described in public access information access.
14. terminal according to claim 13, which is characterized in that the terminal further includes that the 4th receiving unit and interaction are single
Member, in which:
4th receiving unit, for receiving the running time-frequency resource information for the downlink synchronous pilot frequency that the macro base station is sent；
The interactive unit, for receiving the downlink synchronous pilot frequency information that micro- station is sent, and root using the running time-frequency resource information
Down-going synchronous is completed according to the downlink synchronous pilot frequency information.
15. terminal according to claim 14, which is characterized in that the interactive unit includes receiving module and processing mould
Block, in which:
The receiving module is received the target micro-base station and is sent out using non-broadcastedly for utilizing the running time-frequency resource information
The downlink synchronous pilot frequency information sent；
The processing module is synchronized for carrying out downgoing time, frequency, sampling clock according to the downlink synchronous pilot frequency information,
And uplink power estimation.
16. 3 to 15 described in any item terminals according to claim 1, which is characterized in that second determination unit is used for root
According to micro-base station system information mark, selection meets the public access information of condition from public access information list, and by institute
It states the corresponding micro-base station of public access information and is determined as target micro-base station.
17. 3 to 15 described in any item terminals according to claim 1, which is characterized in that the public access information includes at least
One of information:
Access lead, access running time-frequency resource, contention resolved strategy.
18. a kind of micro-base station, which is characterized in that the micro-base station includes listening to unit, judging unit, third determination unit,
In:
It is described to listen to unit, the transmission of the terminal in itself coverage area is listened to for the instruction based on the macro base station belonging to itself
Uplink signal；
The judging unit obtains judging result for judging whether the uplink signal meets preset condition；
The third determination unit, for when the judging result shows that the uplink signal meets preset condition, with institute
It states macro base station and holds consultation and determine and belong to the running time-frequency resource information for downlink synchronous pilot frequency of each micro-base station, to utilize institute
It states running time-frequency resource information and the terminal carries out information exchange.
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| CN201510217269.XA CN106211342B (en) | 2015-04-30 | 2015-04-30 | A kind of small cell accessing method and terminal, base station |
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| CN201510217269.XA CN106211342B (en) | 2015-04-30 | 2015-04-30 | A kind of small cell accessing method and terminal, base station |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103379496A (en) * | 2012-04-27 | 2013-10-30 | 中国移动通信集团公司 | Method, system and device for controlling work condition of small base station |
| CN103874173A (en) * | 2012-12-14 | 2014-06-18 | 中国移动通信集团公司 | Signal detection method, micro base station opening method, and related equipment and systems |
| CN103916931A (en) * | 2013-01-05 | 2014-07-09 | 中国移动通信集团公司 | Terminal access method, large base station, small base station, terminal and system for heterogeneous network |
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| US9973980B2 (en) * | 2013-03-06 | 2018-05-15 | Qualcomm Incorporated | Communications methods and apparatus that facilitate handover decisions and related measurements |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103379496A (en) * | 2012-04-27 | 2013-10-30 | 中国移动通信集团公司 | Method, system and device for controlling work condition of small base station |
| CN103874173A (en) * | 2012-12-14 | 2014-06-18 | 中国移动通信集团公司 | Signal detection method, micro base station opening method, and related equipment and systems |
| CN103916931A (en) * | 2013-01-05 | 2014-07-09 | 中国移动通信集团公司 | Terminal access method, large base station, small base station, terminal and system for heterogeneous network |
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