CN105324969B - Small-power base station, communication system and information transferring method - Google Patents
Small-power base station, communication system and information transferring method Download PDFInfo
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- CN105324969B CN105324969B CN201480029976.XA CN201480029976A CN105324969B CN 105324969 B CN105324969 B CN 105324969B CN 201480029976 A CN201480029976 A CN 201480029976A CN 105324969 B CN105324969 B CN 105324969B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
Abstract
An embodiment of the present invention provides a kind of small-power base station, communication system and information transferring method, in the heterogeneous network applied to the non-pooled deployment of base band.By the way that the information that can be independently accessed macro base station is set to receive processing unit in small-power base station, the broadcast channel and Physical Downlink Control Channel of macro base station are directly received and processed by information reception processing unit, so as to the uplink scheduling information of the user equipment of quick obtaining access macrocell, small-power base station is enabled to carry out the follow-up processing flows such as uplink interference signal elimination and signal merging in time according to uplink scheduling information, the information processing rate of small-power base station is improved, enhances system performance.
Description
Technical field
The present embodiments relate to wireless communication field, more particularly to a kind of small-power base station, communication system and information pass
Transmission method.
Background technology
With the development of radio network technique, covered to promote the capacity of data transmission service, quality and depth, the 4th
Homogeneous network (Homogeneous Network) base used for communication system in the original 2/2.5th, the 3rd generation communication system
A kind of heterogeneous network (Heterogeneous Network, HetNet) system is proposed on plinth.Difference can be included in HetNet
The wireless network of type, such as：There are multiple femtocells (Femto) base stations, micro- in the coverage of a macro base station
Microcellulor (Pico) base station or microcellulor (Micro) base station provide hot spot covering.In general, the hair of different types of base station
It penetrates power and coverage is different, macro base station transmission power is tens watts, and coverage is larger, is known as high-power base station；
Femtocell, micromicro honeycomb base station or microcell base station transmission power and coverage are relatively small, can be referred to as
For small-power base station (Lower Power Node, LPN).
HetNet can be concentrated there are many networking mode, such as based on base band in the middle part of HetNet and the non-base band collection of deployment
The HetNet of administration.Under the HetNet scenes for concentrating deployment in non-base band, macro base station and LPN are deployed in different positions, macro base station
Information exchange is carried out by information transfer channel between station with LPN.Since macro base station and LPN points open deployment, information station is transmitted
The bandwidth of passage and delay requirement are higher, particularly when information transfer channel is non-dedicated passage between station, information propagation delay time
The problem of big, is especially prominent.For the information of some propagation delay times sensitivity, if the transmission of these information is believed between cannot meeting station
Breath exchanges the requirement to time delay, will influence information processing rate, and then causes LPN that can not carry out interference signal elimination and letter in time
Number merge etc. subsequent processes.
The content of the invention
An embodiment of the present invention provides a kind of small-power base station, system and information transferring methods, can promote small-power base
The information processing rate stood.
In a first aspect, an embodiment of the present invention provides a kind of small-power base station, applied in heterogeneous network, the heterogeneous network bag
Include the macro base station of the small-power base station and the covering small-power base station, the small-power base station include information receiving unit,
Scheduling information acquiring unit and middle Transmit Receive Unit, wherein, described information receiving unit is accessed described grand by Radio Link
Base station, and described information receiving unit and radio frequency isolation in the middle Transmit Receive Unit holding；
Described information receiving unit holds for obtaining on the Physical Broadcast Channel PBCH of the macrocell of the macro base station management
The cell level knowledge of the macrocell carried；
Scheduling information acquiring unit, for according to interim with the matched cell-radio network of user equipment (UE) in macrocell
Identification code CRNTI and the cell level knowledge, obtain and are carried on the physical downlink control channel PDCCH channel of the macrocell
The UE uplink scheduling information.
In the first possible realization method of first aspect, described information receiving unit accesses institute by Radio Link
It is synchronous with the macrocell down direction holding after stating macro base station, obtain the physical area identification code PCI of the macrocell, institute
State PCI for identify the PBCH that receives whether belong to the macrocell.
A kind of possible realization method of any of the above with reference to first aspect, the cell level knowledge includes at least, described
The resource block RB distribution situations that the physical mixed automatic re-transmission indicating channel PHICH of macrocell is occupied；
The scheduling information acquiring unit obtains the macrocell according to the CRNTI and the cell level knowledge
The uplink scheduling information of the UE carried in physical downlink control channel PDCCH includes,
The RB distribution situations that the scheduling information acquiring unit is occupied according to the PHICH parse the object of the macrocell
Control format instruction channel PCFICH is managed, the control format pointer CFI in the PCFICH is obtained, determines the macrocell
The symbol numbers and distribution that PDCCH is occupied in a subframe, extract the Downlink Control Information DCI in the PDCCH, parse
The uplink scheduling information of the UEUE included in the DCI of DCI0 forms.
A kind of possible realization method of any of the above with reference to first aspect, it is single that above-mentioned small-power base station further includes reception
Member, for obtaining the CRNTI of the UE in the macrocell from the macro base station, including,
The user accessing information that the macro base station is sent to the small-power base station by transmission channel between station is received, it is described
User accessing information is used to indicate the PDCCH that the scheduling information acquiring unit handles the UE, the user accessing information bag
It includes and the matched CRNTI of the UE.
A kind of possible realization method of any of the above with reference to first aspect, the scheduling information acquiring unit are additionally operable to,
Traversal is likely to occur the CRNTI sections with the matched CRNTI of the UE in each Transmission Time Interval TTI cycles, obtains institute
State CRNTI.
A kind of possible realization method of any of the above with reference to first aspect, the baseband processing unit, for according to institute
The uplink scheduling information for stating UE handles the uplink transmitting signal of the UE, eliminated including uplink interference signal and/or with it is described grand
Base station carries out uplink collaboration multicast communication CoMP.
A kind of possible realization method of any of the above with reference to first aspect, described information receiving unit and the middle radio frequency
Radio frequency isolation includes during Transmit-Receive Unit is kept, and stands alone as described information receiving unit deployment antenna, and described information receiving unit makes
With the antenna cell level knowledge is received from the macro base station.
Second aspect, an embodiment of the present invention provides a kind of communication system, including small-power base station and the covering small work(
The macro base station of rate base station, the small-power base station include information and receive processing unit and middle Transmit Receive Unit, wherein, the letter
Breath receives processing unit and accesses the macro base station by Radio Link, and described information receives processing unit and received with the middle radio frequency
Radio frequency isolation during bill member is kept；
The small-power base station receives the object of the macrocell of the processing unit acquisition macro base station management by described information
The cell level knowledge of the macrocell carried on reason broadcast channel PBCH；
Know temporarily according to the matched cell-radio network of user equipment (UE) in the macrocell small-power base station
Other code CRNTI and the cell level knowledge, obtain carried in the physical downlink control channel PDCCH of the macrocell it is described
The uplink scheduling information of UE；
The macro base station is used for, and receiving processing unit to described information provides the cell level knowledge.
The third aspect, an embodiment of the present invention provides a kind of information transferring method, applied in heterogeneous network, the heterogeneous network
Macro base station including small-power base station and the covering small-power base station, the small-power base station include information receiving unit and
Middle Transmit Receive Unit, wherein, described information receives processing unit and accesses the macro base station, and described information by Radio Link
Radio frequency isolation during processing unit is kept with the middle Transmit Receive Unit is received, the described method includes,
The small-power base station receives the object of the macrocell of the processing unit acquisition macro base station management by described information
The cell level knowledge of the macrocell carried on reason broadcast channel PBCH；
Know temporarily according to the matched cell-radio network of user equipment (UE) in the macrocell small-power base station
Other code CRNTI and the cell level knowledge, obtain carried in the physical downlink control channel PDCCH of the macrocell it is described
The uplink scheduling information of UE.
In the first possible realization method of the third aspect, the small-power base station is handled by described information reception
Unit obtains the cell-level letter of the macrocell carried on the Physical Broadcast Channel PBCH of the macrocell of the macro base station management
Before breath, further comprise：
After described information reception processing unit accesses the macro base station by Radio Link, with the macrocell down direction
It keeps synchronous, obtains the physical area identification code PCI of the macrocell, the PCI is for identifying the PBCH received
It is no to belong to the macrocell.
With reference to a kind of possible realization method of any of the above of the third aspect, the cell level knowledge includes at least, described
The resource block RB distribution situations that the physical mixed automatic re-transmission indicating channel PHICH of macrocell is occupied；
The CRNTI of UE of the small-power base station in the macrocell and the cell level knowledge, described in acquisition
The uplink scheduling information of the UE carried in the physical downlink control channel PDCCH of macrocell includes,
According to the RB distribution situations that the PHICH is occupied, the Physical Control Format Indicator Channel of the macrocell is parsed
PCFICH obtains the control format pointer CFI in the PCFICH, determines that the PDCCH of the macrocell is accounted in a subframe
The Downlink Control Information DCI in the PDCCH is extracted in symbol numbers and distribution, in the DCI for parsing DCI0 forms
Comprising the macrocell UE uplink scheduling information.
With reference to a kind of possible realization method of any of the above of the third aspect, the CRNTI by the small-power base station from
The macro base station obtains, including the small-power base station reception macro base station is sent to described small by transmission channel between station
The user accessing information of power base station, the user accessing information are used to indicate the small-power base station and handle the UE's
PDCCH, the user accessing information include and the matched CRNTI of the UE.
With reference to a kind of possible realization method of any of the above of the third aspect, by the Base-Band Processing list of the small-power base station
Member, which obtains the CRNTI and is transmitted to described information, receives processing unit；
Processing unit is received according to the CRNTI of the forwarding and the cell level knowledge of reception by described information, is obtained
Take the uplink scheduling information of the UE.
With reference to a kind of possible realization method of any of the above of the third aspect, the method further includes：The small-power base
Stand and the uplink of the UE is handled according to the uplink scheduling information of the UE emit signal, eliminated including uplink interference signal and/or
Uplink, which is carried out, with the macro base station cooperates with multicast communication CoMP.
With reference to a kind of possible realization method of any of the above of the third aspect, described information receive processing unit with it is described in
Radio frequency isolation includes during Transmit Receive Unit is kept, and stands alone as described information and receives processing unit deployment antenna, described information connects
It receives processing unit and receives the cell level knowledge from the macro base station using the antenna.
Technical solution disclosed by the embodiments of the present invention is applied in the heterogeneous network of the non-pooled deployment of base band, by small work(
The information that macro base station can be independently accessed by being set in rate base station receives processing unit, and receiving processing unit by the information directly receives
And the broadcast channel and Physical Downlink Control Channel of macro base station are handled, so as to which quick obtaining accesses the upper of the user equipment of macrocell
Row scheduling information so that small-power base station can carry out uplink interference signal elimination and signal in time according to uplink scheduling information
The follow-up processing flows such as merging, improve the information processing rate of small-power base station, enhance system performance.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of heterogeneous network networking scene that the embodiment of the present invention is applicable in；
Fig. 2 is a kind of structure diagram of small-power base station provided in an embodiment of the present invention；
Fig. 3 is a kind of structure diagram of small-power base station provided in an embodiment of the present invention；
Fig. 4 is a kind of flow diagram of information transferring method provided in an embodiment of the present invention；
Fig. 5 is a kind of communication system schematic diagram provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Technical solution provided in an embodiment of the present invention is suitable for may be employed the various types of communication system of heterogeneous network networking mode,
For example, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, time division synchronous
CDMA (Time Division-Synchronous Code Division Multiple Access, TD-SCDMA) system
The communication system of system, Long Term Evolution (Long-Term Evolution, LTE) system and the follow-up evolution of LTE.
The present embodiments relate to base station can be node B (Node-B) in WCDMA or TD-SCDMA system, also may be used
To be the communication system of evolved node B (e-NodeB, evolved NodeB) in LTE communication system or the follow-up evolution of LTE
Similar base station equipment in system.
The present embodiments relate to user equipment (User Equipment, UE) can be through wireless access network (Radio
Access Network, RAN) it communicates with one or more core nets, for example, UE can be mobile phone or have movement
Computer of terminal etc., for example, user equipment can also be portable, pocket, hand-held, built-in computer or it is vehicle-mounted
Mobile device, they exchange voice and/or data with wireless access network.
The embodiment of the present invention defines base station to the unidirectional communications link of UE as downlink, and UE is to the one-way communication of base station
Link is uplink.
The embodiment of the present invention will be illustrated with LTE system, and technical solution provided in an embodiment of the present invention communicates at other
Application in system is similar in LTE system, repeats no more.
In LTE system, the minimum load bearing unit of physical layer data can be resource element (Resource Flement,
RE), a RE can be made of a symbol (Symbol) on a subcarrier and time domain on frequency domain.Physical layer data
Load bearing unit can also for example include resource block (Resource Block, RB).On frequency domain, a RB can include 12 companies
Continuous subcarrier, each subcarrier can occupy the bandwidth of 15KHz, i.e. a RB can occupy the bandwidth of 180KHz；In time domain
On, a RB can include 7 continuous symbols.
Fig. 1 is a kind of heterogeneous network networking scene schematic diagram that the embodiment of the present invention is applicable in, in this scenario, grand including one
Base station eNB, small-power base station a LPN, eNB and LPN are independently disposed, and there are data transmission channels between two equipment to carry out
Information exchange, such as can be optical fiber transport channel, or microwave transmission passage, the present invention are not specially limited this.
The region that eNB is covered is known as macrocell (Macro Cell), for meeting the demand of the mobility of UE and seamless coverage；LPN-
1 as the supplement covered to eNB, and the smaller hot spot region in the range of macrocell covered is known as Microcell or small cell
(Small Cell).After UE enters macrocell, eNB can be accessed and obtain communication service.Clear simple to describe, the present invention is real
Applying in example in the range of macrocell and will access the UE of eNB and is referred to as macrocell UE.When macrocell UE in moving process by
When gradually close to LPN, the uplink signal of macrocell UE to LPN progressively enhances, and LPN is by receiving the uplink of macrocell UE
Scheduling information can carry out the uplink signal processing such as interference cancellation and signal merging, the communication of enhancing macrocell UE
Quality.
An embodiment of the present invention provides a kind of small-power base stations as shown in Figure 2, can be applied in heterogeneous network, described different
Network forming includes the macro base station of the small-power base station and the covering small-power base station, and the small-power base station is received including information
Unit 101, scheduling information acquiring unit 102 and middle Transmit Receive Unit 103, wherein, described information receiving unit 101 passes through nothing
Wired link accesses the macro base station, and described information receiving unit 101 kept with the middle Transmit Receive Unit 103 in radio frequency every
From.
Wherein, information receiving unit 101 possesses the ability carried out wireless communication with macro base station, can be as the use of macro base station
The macro station is accessed at family, is detected by cell signal, the processes such as Signalling exchange establish Radio Link with macro base station and are connected line number of going forward side by side
According to transmission.Detailed access procedure is referred to the process of common UE access base station in the prior art, and this will not be repeated here.In reality
During border is realized, which is referred to common UE designs, and small-power base station is arranged on as a particular terminal
It is internal.
Middle Transmit Receive Unit 103 and information receiving unit 101 are interfered with each other, it is necessary to by middle radio-frequency receiving-transmitting list in order to prevent
Therefore radio frequency isolation during member 103 and information receiving unit 101 are kept, can be individually for information receiving unit 101 and configure antenna,
The prevention at radio-frequency port of information receiving unit 101 can be connected using RF cable with antenna.Wherein, middle Transmit Receive Unit 103 is used
In signal transmitting and receiving, function is identical with the transceiver of base station of the prior art, and this will not be repeated here.Information receiving unit
101 receive the common channel informations such as PBCH, the PDCCH sent from macro base station using the antenna.
In order to avoid middle Transmit Receive Unit 103 interference and to ensure that information receiving unit 101 can be accessed accurately expected
Macro base station simultaneously normally receives the common channel informations such as PBCH, PDCCH that processing macro base station is sent, it is necessary to consider rationally to be deployed as letter
Cease the antenna that receiving unit 101 configures.Specifically, ambient enviroment is may be referred to when disposing antenna, such as along the small-power base
Back haul link (Backhaul) or the power circuit deployment stood, and covered away from middle 103 corresponding antenna of Transmit Receive Unit
Scale deployments；Or miniature antenna is oriented using high-gain, it is covered in middle 103 corresponding antenna lobe of Transmit Receive Unit weaker
The modes such as regional deployment, the embodiment of the present invention are not specially limited the deployment way of antenna.
Information receiving unit 101, can be by the modes such as being pre-configured with after macro base station is accessed, such as information is received single
Member 101 is arranged to continue to send data transfer request to the corresponding macrocell of the macro base station so that information receiving unit 101 can be with
The macrocell is resided, avoids the occurrence of cell switching.Meanwhile information receiving unit 101 can be and above-mentioned grand after macro base station is accessed
Cell downlink direction keeps synchronous, obtains the Physical Cell Identifier (Physical Cell Identify, PCI) of the macrocell,
The signal from different community is distinguished, receives the information of the common signal channel carrying of macrocell.
Described information receiving unit 101, for obtaining the Physical Broadcast Channel of the macrocell of the macro base station management
The cell level knowledge of the macrocell carried on (Physical Broadcast Channel, PBCH).
Specifically, information receiving unit 101 accesses macro base station by Radio Link, receives and demodulates the PBCH of macrocell,
The cell level knowledge of the macrocell carried on PBCH is obtained, including physical mixed automatic re-transmission indicating channel (Physical
Hybrid ARQ Indicator Channel, PHICH) occupy resource block (Resource Block, RB) distribution situation, it is small
The system informations such as the antenna port quantity in area.By PBCH, all UE into cell broadcast identical system information, letter to macrocell
Cease user of the receiving unit 101 as macro base station, can by Radio Link directly, rapidly acquisition above system information.
Scheduling information acquiring unit 102, for basis and the matched cell-radio network of user equipment (UE) in macrocell
Interim identity CRNTI and the cell level knowledge, obtain on the physical downlink control channel PDCCH channel of the macrocell
The uplink scheduling information of the UE of carrying.
Wherein, CRNTI belong to Radio Network Temporary Identifier (Radio Network Temporary Identifier,
RNTI one kind) is applicable in cell range, and for identifying UE on district common channel, each UE has in a cell
The CRNTI of unique match can be used for distinguishing different UE.Specifically, when district common channel carrying be UE special logic
During the data of channel, CRNTI can be added on protocol Data Unit (Protocol Data Unit, PDU) head of MAC layer and made
Different UE is distinguished for special identifier, CRNTI is generally 16 bits.
Specifically, PDCCH it is upper can with bearing downlink control information (Downlink Control Information, DCI),
It can include the resource allocation information and other control information on multiple UE.Specifically include, downlink data transmission scheduling information, on
Row data transmitting scheduling information and uplink power control commands etc..Correspondingly, the form of DCI includes DCI0, DCI1/1A/
1B/1C, DCI2, DCI3/3A etc. are several.Wherein, the DCI of DCI0 forms is used to send uplink synchronous channel
The uplink scheduling information of the resource allocation information, that is, macrocell UE of (Synchronization Channel, SCH), other DCI lattice
Formula bearing downlink data transmission scheduling information and uplink power control commands.The control channel resource units that PDCCH is used are
CCE, PDCCH can be transmitted on one or more continuous CCE, in general, in a subframe, can be had multiple
PDCCH。
After demodulating PBCH and obtaining the cell level knowledge of macrocell, scheduling information acquiring unit 102 can be according to PHICH
PCFICH is parsed, is determined by the control format pointer (Control Format Indicator, CFI) defined in PCFICH
The symbol numbers and distribution that PDCCH is occupied in a subframe.Due in the occupied symbols of PDCCH, except PDCCH, going back
Include reference signal (Reference Signal, RS), Physical Control Format Indicator Channel (Physical Control
Format Indicator Channel, PCFICH), the contents such as PHICH, and wherein, the distribution of PCFICH and content are in PBCH
Can be clear and definite after reception, the distribution of PHICH can also be determined by PCFICH, and the distribution of RS depends on the day broadcasted in PBCH
Line port number.Accordingly, the other information in the occupied symbols of PDCCH can be removed, determines the distribution of PDCCH, that is, is determined
The RE that whole PDCCH can be occupied in a subframe.
After the RE of PDCCH occupancy is determined, scheduling information acquiring unit 102 can be according to the RB positions of PDCCH resource mapping
It puts, the DCI on extraction correlation RB further according to the CRNTI of specific macrocell UE, is solved on RB positions corresponding with macrocell UE
Recall the DCI of the uplink scheduling information for belonging to macrocell UE, i.e. DCI0 forms.
Specifically, scheduling information acquiring unit 102 can be CRC with CRNTI corresponding with specific macrocell UE to PDCCH
Verification, if CRC check success, the information for illustrating to carry on PDCCH is matched with macrocell UE.Simultaneously as scheduling
The information that information acquisition unit 102 it is expected to receive is the DCI of DCI0 forms, therefore it may only be necessary to using the DCI0 being likely to occur
Form is decoded the PDCCH for using CRNTI scramblers, it is possible to parse the particular content of DCI0 format informations, is somebody's turn to do
The uplink scheduling information of macrocell UE.
Optionally, as an alternative embodiment of the invention, middle Transmit Receive Unit 103 can be used for from the grand base
Stand and obtain the CRNTI of the UE in the macrocell, including, receive the macro base station be sent to by transmission channel between station it is described small
The user accessing information of power base station, the user accessing information are used to indicate the scheduling information acquiring unit and handle the UE
PDCCH, the user accessing information include and the matched CRNTI of the UE.
For example, macro base station can identify the potential macrocell UE that uplink interference can be caused to the small-power base station, for quilt
The user of CRNTI comprising macrocell UE is accessed letter by the macrocell UE identified, macro station by information transfer channel between station
Breath is sent to corresponding small-power base station, is received by middle Transmit Receive Unit 103, and is transmitted to scheduling information processing unit 102,
By scheduling information processing unit 102 parse wherein with the matched CRNTI of particular UE.Since propagation delay time length is to small-power base
It stands and is had no adverse effect using CRNTI, therefore information transmission mode of the prior art may be employed, save system-computed money
Source, the embodiment of the present invention are not specially limited this.
Optionally, as an alternative embodiment of the invention, scheduling information acquiring unit 102 can be also used for, each
Transmission Time Interval (Transmission Time Interval, TTI) traveled through in the cycle be likely to occur it is matched with the UE
The CRNTI sections of CRNTI, obtain the CRNTI.
Specifically, scheduling information acquiring unit 102 travels through the CRNTI sections for the CRNTI information for being likely to occur macrocell UE,
And it is matched one by one with PDCCH.Optionally, a kind of situation is that information receiving unit 101 is traveled through as defined in existing protocol entirely
CRNTI sections, i.e., 0~65536；Another situation is, scheduling information acquiring unit 102 according to its data processing capacity,
It safeguards some subset in entire CRNTI sections, then only travels through the subset within each TTI cycles, which can be by system
Operations are deleted and updated etc. to operation conditions.Traversal herein refers to will be each in entire section or some subset
The CNRTI and PDCCH that receives carries out CRC check, select with the matched CRNTI of macrocell UE, held so as to obtain on PDCCH
The uplink scheduling information of the macrocell UE carried, the mode of specific acquisition uplink scheduling information is existing in the aforementioned embodiment to retouch
It states, this will not be repeated here.
The CRNTI of macrocell UE is obtained using traversal mode, macro base station to small-power base station without sending macrocell UE again
User accessing information, the limitation smaller of transmission channel station so that the erection of small-power base station is more flexible.
Optionally, small-power base station can also include the baseband processing unit (Base Band Unite, BBU) 104,
The uplink that can be used for handling the macrocell UE according to the uplink scheduling information of above-mentioned macrocell UE emits signal, including uplink
Interference signal, which eliminates and/or carries out uplink with the macro base station, cooperates with coordinated multipoint transmission (Coordinated Multiple
Points Transmission, CoMP).
Specifically, the uplink scheduling information of the macrocell UE of acquisition can be sent to base by scheduling information acquiring unit 102
Tape handling unit 104.There is data message interaction channel between scheduling information acquiring unit 102 and baseband processing unit 104, and
The data message interaction channel propagation delay time is short, can meet requirement of the uplink scheduling information to propagation delay time.Scheduling information obtains
Unit 102 and baseband processing unit 104 can be directly connected to or indirect communication, the embodiment of the present invention does not do this special limit
It is fixed.
In heterogeneous network, when the small-power base station under macrocell UE is covered close to macro base station, macrocell UE to the small work(
The uplink signal of rate base station progressively enhances, even if the uplink signal of macrocell UE to small-power base station is more than certainly
The uplink signal of own service link, since the transmission power of macrocell is stronger than small-power base station transmitting power, the downlink of macro base station
Service link is still stronger than the downlink of small-power base station, is unsatisfactory for macrocell UE and starts the condition that handover measurement reports, nothing
Method is realized is switched to small-power base station by macrocell UE, and therefore, the uplink signal that such macrocell UE is sent can be to small work(
Rate base station uplink causes strong jamming.In order to solve above-mentioned interference problem, small-power base station can receive the uplink for handling the grand UE
Signal reconstructs and offsets the uplink signal, eliminates interference, promotes the small-power base station uplink receiving quality.Specific signal weight
It structure and offsets processing procedure and is referred to related content of the prior art, the embodiment of the present invention does not repeat this.
Further, since when macrocell UE is close to small-power base station, macrocell UE to the uplink signal of small-power base station
Quality of uplink signal than arriving macro base station service link is good, accordingly it is also possible to utilize macrocell UE to the upper of small-power base station
Downlink signal does uplink CoMP processing for macrocell UE, promotes the uplink receiving quality of macrocell UE.Specifically, it is grand
Base station provides the uplink scheduling information of the grand UE to small-power base station, and the data for handling macrocell UE are received by small-power base station
The data-signal of the macrocell UE of reception is forwarded to the macrocell UE of macro station and macro base station reception by signal, small-power base station
Data-signal merge.Specific processing step is referred to related content of the prior art, the embodiment of the present invention pair
This is not repeated.
The small-power base station receives the macro base station to be included by the user accessing information that transmission channel between station is sent, institute
It states baseband processing unit 104 and receives the user accessing information, parse the CRNTI of the macrocell UE and be transmitted to the tune
Spend information acquisition unit 102.
It is appreciated that above-mentioned each unit is the division in logic that a kind of function to small-power base station carries out, it is above-mentioned
The function of each unit can in any combination, such as can be integrated in one or more modules and realized, can also be existing by base station
Function module disperse or concentrative implementation.For example, information receiving unit 101 can be merged into scheduling information acquiring unit 102
One processing unit, by the uplink tune of processing unit access macrocell, the cell level knowledge for obtaining macrocell and then acquisition UE
The function of information is spent, which can communicate with existing baseband processing unit, middle Transmit Receive Unit etc. in base station.Example again
Such as, the function of information receiving unit 101 and scheduling information acquiring unit 102 may be integrated into baseband processing unit 104.It is right
The function division of unit, the embodiment of the present invention does not do any restriction, as long as possessing the small-power base station of the function of above-mentioned each unit
It both falls in protection scope of the present invention.
Small-power base station provided in an embodiment of the present invention, in the heterogeneous network applied to the non-pooled deployment of base band, by
The information receiving unit of macro base station can be independently accessed by being set in small-power base station, and receiving processing unit by the information directly receives
And the broadcast channel and Physical Downlink Control Channel of macro base station are handled, so as to which quick obtaining accesses the upper of the user equipment of macrocell
Row scheduling information so that small-power base station can carry out uplink interference signal elimination and signal in time according to uplink scheduling information
The follow-up processing flows such as merging, improve the information processing rate of small-power base station, enhance system performance.
An embodiment of the present invention provides a kind of small-power base stations as shown in Figure 3, can be applied in heterogeneous network, described different
Network forming includes the macro base station of the small-power base station and the covering small-power base station, and the small-power base station includes receiver
201st, processor 202 and transceiver 203, wherein, the receiver 201 accesses the macro base station, and institute by Radio Link
State radio frequency isolation during receiver 201 is kept with the transceiver 203.
Wherein, receiver 201 possesses the ability carried out wireless communication with macro station, and can be accessed as the user of macro base station should
Macro station is detected by cell signal, the processes such as Signalling exchange and macro base station establish Radio Link and be connected and carry out data transmission.In detail
Thin access procedure is referred to the process of common UE access base station in the prior art, and this will not be repeated here.In practical implementations,
The receiver 201 is referred to common UE designs, and small-power inside of base station is arranged on as a particular terminal.
Transceiver 203 is used for signal transmitting and receiving, and function is identical with the transceiver of base station of the prior art, herein not
It repeats.
The small-power base station further includes, the antenna 204 being connected with receiver 201, can be used for accessing receiver 201 pair
The macro base station answered.
Specifically, in order to prevent transceiver 203 and receiver 201 interfere with each other, it is necessary to by transceiver 203 and receive
Device 201 carries out middle radio frequency isolation, therefore, can be individually for receiver 101 and configure antenna 204, receiver 101 uses the antenna
Receive the common channel informations such as PBCH, the PDCCH sent from macro base station.
Handle what macro base station was sent to ensure that receiver 201 can accurately access expected macro base station and normally receive
The common channel informations such as PBCH, PDCCH are, it is necessary to consider the deployment of antenna 203.Specific deployment way is referred to shown in Fig. 2
The associated description of embodiment, this will not be repeated here.
The small-power base station can also include communication interface 205, for carrying out information exchange between other base stations.Example
Such as, the communication interface 205 can be X2 interface.The X2 interface defines point-to-point between base station in logic and base station
Connection, the specific implementation of physical layer can be herein not specially limited, connect by X2 with copper cable, the methods of microwave, optical fiber
Mouthful, data transmission channel between station can be established between small-power base station and macro base station.
The receiver 201, for obtaining the Physical Broadcast Channel (Physical of the macrocell of the macro base station management
Broadcast Channel, PBCH) on the cell level knowledge of the macrocell that carries.
Specifically, receiver 201 accesses macro base station by Radio Link, receives and demodulates the PBCH of macrocell, obtains
The cell level knowledge of the macrocell carried on PBCH, including PHICH) occupy resource block distribution situation, the antenna port of cell
The system informations such as quantity.By PBCH, all UE into cell broadcast identical system information to macrocell, and receiver 201 is as grand
The user of base station, can by Radio Link directly, rapidly obtain above system information.
Optionally, after receiver 201 accesses macro base station by Radio Link, it can keep same with macrocell down direction
Step, obtains the Physical Cell Identifier code PCI of the macrocell, distinguishes the signal from different community, receive the public letter of macrocell
The information of road carrying.
Processor 202, for basis and the matched cell-radio network interim identity of user equipment (UE) in macrocell
CRNTI and the cell level knowledge, obtain carried on the physical downlink control channel PDCCH channel of the macrocell it is described
The uplink scheduling information of UE.
Wherein, CRNTI belongs to one kind of Radio Network Temporary Identifier, is applicable in cell range, for public in cell
UE is identified on channel, each UE has the CRNTI of unique match in a cell, can be used for distinguishing different UE.
Specifically, the Physical Control Format Indicator Channel PCFICH of the macrocell can be parsed according to PHICH, obtains institute
The control format pointer CFI in PCFICH is stated, determines the symbol numbers that the PDCCH of the macrocell is occupied in a subframe.
Optionally, the small-power base station obtains the institute carried in the physical downlink control channel PDCCH of the macrocell
The uplink scheduling information of UE is stated, including,
The Downlink Control Information DCI in the PDCCH is demodulated, obtains the macrocell included in the DCI of DCI0 forms
The resource allocation information of the uplink synchronous channel SCH of the UE i.e. uplink scheduling information of macrocell UE.
The acquisition process of detailed uplink scheduling information is referred to the related content of other embodiments of the invention, herein not
It repeats.
The acquisition process of specific uplink scheduling information is referred to the associated description of embodiment illustrated in fig. 2, does not do herein
It repeats.
Optionally, as an alternative embodiment of the invention, transceiver 203, described in being obtained from the macro base station
The CRNTI of UE in macrocell, including receiving the macro base station and being sent to the small-power base station by transmission channel between station
User accessing information, the user accessing information are used to indicate the PDCCH that the scheduling information acquiring unit handles the UE, institute
Stating user accessing information includes and the matched CRNTI of the UE.
For example, macro base station can identify the potential macrocell UE that uplink interference can be caused to the small-power base station, for quilt
The macrocell UE identified, macro station will include the CRNTI of macrocell UE by information transfer channel between station, such as X2 interface
User accessing information be sent to corresponding small-power base station, received by transceiver 203, and be transmitted to processor 202, by
Reason device 202 parse wherein with the matched CRNTI of macrocell UE.
Optionally, as an alternative embodiment of the invention, processor 202 can be also used for, in each TTI cycles time
The CRNTI sections being likely to occur with the matched CRNTI of the UE are gone through, obtain the CRNTI.Specific traversal mode is referred to
The associated description of embodiment illustrated in fig. 2, this will not be repeated here.
The CRNTI of macrocell UE is obtained using traversal mode, macro base station to small-power base station without sending macrocell UE again
User accessing information, the limitation smaller of transmission channel station so that the erection of small-power base station is more flexible.
Optionally, processor 202 can be also used for being handled according to the uplink scheduling information of above-mentioned macrocell UE described grand small
The uplink transmitting signal of area UE, eliminates including uplink interference signal and/or cooperates with multipoint cooperative with macro base station progress uplink
The processing such as transmission.Specific processing procedure is referred to the associated description of embodiment illustrated in fig. 2, and this will not be repeated here.
The receiver 201, processor 202, transceiver 203 can be connected by communication bus 206, and the communication is total
Line can be local bus (local bus).The processor 202 can be polycaryon processor or in geographical location
It is upper scattered and with the processor that communication link connects, can be central processing unit (central processing unit,
) or digital signal processor (digital signal processor, DSP) or other special disposal CPU
Device, the embodiment of the present invention are not specially limited this.In practical applications, processor 202 can be integrated in the base band of base station
In processing unit.
Small-power base station provided in an embodiment of the present invention, in the heterogeneous network applied to the non-pooled deployment of base band, by
The receiver of macro base station can be independently accessed by being set in small-power base station, and macro base station is directly received and processed by receiver member
Broadcast channel and Physical Downlink Control Channel so as to the uplink scheduling information of the user equipment of quick obtaining access macrocell, make
The follow-up place such as uplink interference signal elimination and signal merging can be carried out in time according to uplink scheduling information by obtaining small-power base station
Flow is managed, the information processing rate of small-power base station is improved, enhances system performance.
An embodiment of the present invention provides a kind of information transferring methods, and applied in heterogeneous network, the heterogeneous network includes small work(
Rate base station and the macro base station of the covering small-power base station, the small-power base station includes information receiving unit and middle radio frequency is received
Bill member, wherein, described information receives processing unit and accesses the macro base station by Radio Link, and described information reception is handled
Radio frequency isolation during unit is kept with the middle Transmit Receive Unit, method flow are as shown in Figure 4.
Above- mentioned information receives processing unit and possesses the ability carried out wireless communication with macro station, can be as the user of macro base station
The macro station is accessed, is detected by cell signal, the processes such as Signalling exchange and macro base station establish Radio Link and be connected and carry out data
Transmission.Specifically, can be that the information receives processing unit separate configurations antenna, for accessing corresponding macro base station, information connects
It receives processing unit and the common channel informations such as PBCH, the PDCCH sent from macro base station is received using the antenna.
It is sent out to ensure that information reception processing unit can accurately access expected macro base station and normally receive processing macro base station
The common channel informations such as PBCH, the PDCCH sent are, it is necessary to consider the deployment for the antenna being connected with information reception processing unit.Antenna
Suitable deployment can prevent middle Transmit Receive Unit and information from receiving processing unit and interfering with each other, make the transmitting-receiving of small-power base station
Letter machine or middle Transmit Receive Unit receive radio frequency isolation during processing unit is kept with information.Specific allocating antenna mode can join
According to the associated description of embodiment illustrated in fig. 2, this will not be repeated here.
This method includes S301-S302：
S301, the small-power base station receive the macrocell of the processing unit acquisition macro base station management by described information
Physical Broadcast Channel PBCH on the cell level knowledge of the macrocell that carries.
Wherein, the cell level knowledge includes at least, the money of the Physical HARQ Indicator Channel PHICH occupancy of the macrocell
Source distribution, the information such as antenna port quantity of the macrocell.
It is alternatively possible to by the modes such as being pre-configured with, such as information is made to receive processing unit and continues to send to macro base station
Data transfer request so that information receives processing unit after corresponding macrocell is accessed, and can reside the macrocell, avoid out
Existing cell switching.
Optionally, S300 can also be included before S301, including information receives processing unit and accessed by Radio Link
, can be synchronous with the macrocell down direction holding after the macro base station, obtain the Physical Cell Identifier code of the macrocell
PCI distinguishes the signal from different community, receives the information of the common signal channel carrying of macrocell.
The cell level knowledge acquisition process of detailed macrocell is referred to the related content of other embodiments of the invention,
This is not repeated.
S302, the small-power base station are faced according to the matched cell-radio network of user equipment (UE) in the macrocell
When the identification code CRNTI and cell level knowledge, obtain what is carried in the physical downlink control channel PDCCH of the macrocell
The uplink scheduling information of the UE.
Wherein, CRNTI belongs to one kind of Radio Network Temporary Identifier, is applicable in cell range, for public in cell
UE is identified on channel, each UE has the CRNTI of unique match in a cell, can be used for distinguishing different UE.
Specifically, the Physical Control Format Indicator Channel PCFICH of the macrocell can be parsed according to PHICH, obtains institute
The control format pointer CFI in PCFICH is stated, determines the symbol numbers that the PDCCH of the macrocell is occupied in a subframe.
Optionally, the small-power base station obtains the institute carried in the physical downlink control channel PDCCH of the macrocell
The uplink scheduling information of UE is stated, including,
The Downlink Control Information DCI in the PDCCH is demodulated, obtains the macrocell included in the DCI of DCI0 forms
The resource allocation information of the uplink synchronous channel SCH of the UE i.e. uplink scheduling information of macrocell UE.
The acquisition process of detailed uplink scheduling information is referred to the related content of other embodiments of the invention, herein not
It repeats.
Optionally, the acquisition of the uplink scheduling information of above-mentioned UE can receive processing unit by above- mentioned information and complete, and also may be used
To be completed by other function modules in small-power base station, such as can be completed by baseband processing unit, the embodiment of the present invention pair
This is not specially limited.
Optionally, the CRNTI can be obtained by the small-power base station from the macro base station, including small-power base station
Receive the user accessing information that the macro base station is sent to the small-power base station by transmission channel between station, user's access
Information is used to indicate the PDCCH that the small-power base station handles the UE, and the user accessing information includes matching with the UE
CRNTI.
Optionally, small-power base station can travel through the macrocell that is likely to occur CRNTI in each TTI cycles
The section of PDCCH obtains the CRNTI of the macrocell UE.Obtain the CRNTI of macrocell UE using traversal mode, macro base station without
It needs again to the user accessing information of small-power base station transmission macrocell UE so that the erection of small-power base station is more flexible, to station
Between transmission channel limitation smaller.Specific traversal mode is referred to the description in other embodiments of the invention, does not do herein
It repeats.
The CRNTI of macrocell UE is obtained using traversal mode, macro base station to small-power base station without sending macrocell UE again
User accessing information, the limitation smaller of transmission channel station so that the erection of small-power base station is more flexible.
It is alternatively possible to above-mentioned CRNTI is obtained by the baseband processing unit of the small-power base station and is transmitted to the letter
Breath receives processing unit；And processing unit is received according to the CRNTI of the forwarding by described information and is parsed described small
Area's grade information obtains the uplink scheduling information of the UE.
Alternatively it is also possible to by information receive processing unit directly receive macro base station transmission user accessing information or time
Above-mentioned CRNTI sections are gone through to obtain the CRNTI of specific macrocell UE, further obtain the uplink scheduling information of the UE.
The acquisition process of the CRNTI of detailed macrocell UE is referred to the related content of other embodiments of the invention,
This is not repeated.
Optionally, step S303 can also be included after S302, the small-power base station is according to the uplink tune of the UE
The uplink transmitting signal of UE described in information processing is spent, is eliminated including uplink interference signal and/or carries out uplink with the macro base station
Cooperate with multicast communication.
Specifically, can be received by described information processing unit the uplink scheduling information of acquisition is sent to it is described small
The baseband processing unit of power base station.Institute is handled according to the uplink scheduling information of the macrocell UE by the baseband processing unit
The uplink transmitting data of macrocell UE are stated, eliminated including uplink interference signal and/or are cooperateed with macro base station progress uplink more
The processing such as point transmission.Specific processing procedure is referred to the associated description of other embodiments of the invention, and this will not be repeated here.
It is appreciated that the information in embodiment of the method shown in Fig. 4, which receives processing unit, only represents a kind of work(in logic
Energy unit, can possess the function of the information receiving unit 101 in Fig. 2 shown device embodiments or can possess shown in Fig. 2
The function of information receiving unit 101 and scheduling information acquiring unit 102 in device embodiment.The embodiment of the present invention does not do this
Any restriction.
Information transferring method disclosed by the embodiments of the present invention be applied to the non-pooled deployment of base band heterogeneous network in, by
The information that macro base station can be independently accessed by being set in small-power base station receives processing unit, and it is direct to receive processing unit by the information
The broadcast channel and Physical Downlink Control Channel of macro base station are received and processed, so as to the user equipment of quick obtaining access macrocell
Uplink scheduling information so that small-power base station can in time be carried out according to uplink scheduling information uplink interference signal elimination and
The follow-up processing flows such as signal merging, improve the information processing rate of small-power base station, enhance system performance.
An embodiment of the present invention provides a kind of communication system, as shown in figure 5, the communication system includes small-power base station 401,
And the macro base station 402 of the covering small-power base station, the small-power base station 401 include information and receive processing unit and middle radio frequency
Transmit-Receive Unit, wherein, described information receives processing unit and accesses the macro base station, and described information receiving area by Radio Link
Manage radio frequency isolation during unit is kept with the middle Transmit Receive Unit；
The small-power base station 401 receives the macrocell of the processing unit acquisition macro base station management by described information
The cell level knowledge of the macrocell carried on Physical Broadcast Channel PBCH；
The small-power base station 401 is according to interim with the matched cell-radio network of user equipment (UE) in the macrocell
Identification code CRNTI and the cell level knowledge obtain the institute carried in the physical downlink control channel PDCCH of the macrocell
State the uplink scheduling information of UE；
The macro base station 402 is used for, and receiving processing unit to described information provides the cell level knowledge.
Using communication system disclosed by the embodiments of the present invention, grand base can be independently accessed by being set in small-power base station
The information stood receives processing unit, and the broadcast channel and physics of macro base station are directly received and processed by information reception processing unit
Down control channel, so as to the uplink scheduling information of the user equipment of quick obtaining access macrocell so that small-power base station energy
It is enough to carry out the follow-up processing flows such as uplink interference signal elimination and signal merging in time according to uplink scheduling information, it improves small
The information processing rate of power base station, enhances system performance.
It is apparent to those skilled in the art that can be cross-referenced between various embodiments of the present invention,
The small-power base station of Fig. 2 or embodiment illustrated in fig. 3 can implement the information transferring method of embodiment illustrated in fig. 5, implement shown in Fig. 5
The executive agent of information transferring method in example can be the small-power base station in Fig. 2 or embodiment illustrated in fig. 3, lead to shown in Fig. 4
The small-power base station in Fig. 2 or embodiment illustrated in fig. 3 can be included in letter system.For convenience and simplicity of description, foregoing description
Method idiographic flow, may be referred to the function description of corresponding unit in aforementioned device embodiment or module.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the module, only
Only a kind of division of logic function can have other dividing mode in actual implementation, such as multiple module or components can be tied
It closes or is desirably integrated into another equipment or some features can be ignored or does not perform.
In addition, each function module in each embodiment of the present invention can be integrated in a processing module, Ke Yishi
Modules are individually physically present, can also two or more modules be integrated in a module.
One of ordinary skill in the art will appreciate that hardware can be passed through by implementing all or part of step of above-described embodiment
It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In medium, storage medium mentioned above can be read-only memory, disk or CD etc..
It is last it should be noted that：The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, all
Within the spirit and principles in the present invention, any modifications, equivalent replacements and improvements are made should be included in the guarantor of the present invention
Within the scope of shield.
Claims (16)
1. a kind of small-power base station, which is characterized in that applied in heterogeneous network, the heterogeneous network include the small-power base station and
Cover the macro base station of the small-power base station, the small-power base station include information receiving unit, scheduling information acquiring unit and
Middle Transmit Receive Unit, wherein, described information receiving unit accesses the macro base station by Radio Link, and described information receives
Radio frequency isolation during unit is kept with the middle Transmit Receive Unit；
Described information receiving unit, for obtaining what is carried on the Physical Broadcast Channel PBCH of the macrocell of the macro base station management
The cell level knowledge of the macrocell；
Scheduling information acquiring unit identifies temporarily for basis with the matched cell-radio network of user equipment (UE) in macrocell
Code CRNTI and the cell level knowledge, obtain the institute carried on the physical downlink control channel PDCCH channel of the macrocell
State the uplink scheduling information of UE.
2. small-power base station according to claim 1, which is characterized in that
After described information receiving unit accesses the macro base station by Radio Link, keep same with the macrocell down direction
Step, obtains the physical area identification code PCI of the macrocell, and whether the PBCHs of the PCI for identification to receive belongs to
The macrocell.
3. small-power base station according to claim 1 or 2, which is characterized in that the cell level knowledge includes at least, described
The resource block RB distribution situations that the physical mixed automatic re-transmission indicating channel PHICH of macrocell is occupied；
The scheduling information acquiring unit obtains the physics of the macrocell according to the CRNTI and the cell level knowledge
The uplink scheduling information of the UE carried on down control channel PDCCH includes,
The RB distribution situations that the scheduling information acquiring unit is occupied according to the PHICH parse the physics control of the macrocell
Format indication channel PCFICH processed obtains the control format pointer CFI in the PCFICH, determines the PDCCH of the macrocell
The symbol numbers occupied in a subframe and distribution extract the Downlink Control Information DCI in the PDCCH, parse DCI0
The uplink scheduling information of the UE included in the DCI of form.
4. small-power base station according to claim 1, which is characterized in that the middle Transmit Receive Unit, for from described
Macro base station obtains the CRNTI of the UE in the macrocell, including receiving the macro base station and being sent to institute by transmission channel between station
The user accessing information of small-power base station is stated, the user accessing information is used to indicate the scheduling information acquiring unit processing institute
The PDCCH of UE is stated, the user accessing information includes and the matched CRNTI of the UE.
5. small-power base station according to claim 1, which is characterized in that the scheduling information acquiring unit is additionally operable to,
Traversal is likely to occur the CRNTI sections with the matched CRNTI of the UE in each Transmission Time Interval TTI cycles, described in acquisition
CRNTI。
6. small-power base station according to claim 1, which is characterized in that baseband processing unit is further included,
The baseband processing unit emits signal, bag for handling the uplink of the UE according to the uplink scheduling information of the UE
Uplink interference signal is included to eliminate and/or cooperate with multicast communication CoMP with macro base station progress uplink.
7. small-power base station according to claim 1, which is characterized in that described information receiving unit is received with the middle radio frequency
Radio frequency isolation includes during bill member is kept, and stands alone as described information receiving unit deployment antenna, and described information receiving unit uses
The antenna receives the cell level knowledge from the macro base station.
8. a kind of communication system, the macro base station including small-power base station and the covering small-power base station, the small-power base station
Processing unit and middle Transmit Receive Unit are received including information, wherein, described information receives processing unit and is connect by Radio Link
Enter the macro base station, and described information receives radio frequency isolation during processing unit is kept with the middle Transmit Receive Unit；
The physics that the small-power base station receives the macrocell that processing unit obtains the macro base station management by described information is wide
Broadcast the cell level knowledge of the macrocell carried on channel PBCH；
The small-power base station according to the matched cell-radio network interim identity of user equipment (UE) in the macrocell
CRNTI and the cell level knowledge obtain the UE's that is carried in the physical downlink control channel PDCCH of the macrocell
Uplink scheduling information；
The macro base station is used for, and receiving processing unit to described information provides the cell level knowledge.
9. a kind of information transferring method, which is characterized in that applied in heterogeneous network, the heterogeneous network includes small-power base station and covers
The macro base station of the small-power base station is covered, the small-power base station includes information and receives processing unit and middle Transmit Receive Unit,
Wherein, described information receives processing unit and accesses the macro base station by Radio Link, and described information receive processing unit with
Radio frequency isolation during the middle Transmit Receive Unit is kept, the described method includes,
The physics that the small-power base station receives the macrocell that processing unit obtains the macro base station management by described information is wide
Broadcast the cell level knowledge of the macrocell carried on channel PBCH；
The small-power base station according to the matched cell-radio network interim identity of user equipment (UE) in the macrocell
CRNTI and the cell level knowledge obtain the UE's that is carried in the physical downlink control channel PDCCH of the macrocell
Uplink scheduling information.
10. according to the method described in claim 9, it is characterized in that, the small-power base station is handled by described information reception
Unit obtains the cell-level letter of the macrocell carried on the Physical Broadcast Channel PBCH of the macrocell of the macro base station management
Before breath, further comprise：
After described information reception processing unit accesses the macro base station by Radio Link, kept with the macrocell down direction
It is synchronous, the physical area identification code PCI of the macrocell is obtained, whether the PBCHs of the PCI for identification to receive belongs to
In the macrocell.
11. the method according to claim 9 or 10, which is characterized in that the cell level knowledge includes at least, described grand small
The resource block RB distribution situations that the physical mixed automatic re-transmission indicating channel PHICH in area is occupied；
The CRNTI of UE of the small-power base station in the macrocell and the cell level knowledge obtain described grand small
The uplink scheduling information of the UE carried in the physical downlink control channel PDCCH in area includes,
According to the RB distribution situations that the PHICH is occupied, the Physical Control Format Indicator Channel PCFICH of the macrocell is parsed,
The control format pointer CFI in the PCFICH is obtained, determines the symbol that the PDCCH of the macrocell is occupied in a subframe
The Downlink Control Information DCI in the PDCCH is extracted in number and distribution, parses the institute included in the DCI of DCI0 forms
State the uplink scheduling information of macrocell UE.
12. according to the method described in claim 9, it is characterized in that, the CRNTI by the small-power base station from the grand base
It stands acquisition, including,
The small-power base station receives the user that the macro base station is sent to the small-power base station by transmission channel between station and connects
Enter information, the user accessing information is used to indicate the PDCCH that the small-power base station handles the UE, and the user accesses letter
Breath includes and the matched CRNTI of the UE.
13. according to the method described in claim 9, it is characterized in that, the small-power base station is in each Transmission Time Interval TTI
Traversal is likely to occur the CRNTI sections with the matched CRNTI of the UE in cycle, obtains the CRNTI.
14. the method according to claim 12 or 13, which is characterized in that
The CRNTI is obtained by the baseband processing unit of the small-power base station and is transmitted to described information and receives processing unit；
Processing unit is received according to the CRNTI of the forwarding and the cell level knowledge of reception by described information, obtains institute
State the uplink scheduling information of UE.
15. according to the method described in claim 9, it is characterized in that, the method further includes：
The uplink that the small-power base station handles the UE according to the uplink scheduling information of the UE emits signal, is done including uplink
Signal is disturbed to eliminate and/or cooperate with multicast communication CoMP with macro base station progress uplink.
16. according to the method described in claim 9, it is characterized in that, described information receives processing unit and the middle radio frequency receipts
Radio frequency isolation includes during bill member is kept, and stands alone as described information and receives processing unit deployment antenna, described information reception processing
Unit receives the cell level knowledge using the antenna from the macro base station.
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2014/079088 WO2015184588A1 (en) | 2014-06-03 | 2014-06-03 | Low power node, communication system and information transmission method |
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| CN105324969B true CN105324969B (en) | 2018-06-05 |
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| KR101400882B1 (en) * | 2008-04-25 | 2014-06-30 | 삼성전자주식회사 | A method for wireless communication between femto-BS and macro-BS, and a system thereof |
| US10090956B2 (en) * | 2009-06-16 | 2018-10-02 | Qualcomm Incorporated | Mechanisms for information exchange across cells to facilitate reception in a heterogeneous network |
| EP2489229A1 (en) * | 2009-10-16 | 2012-08-22 | Nokia Siemens Networks Oy | Control channel coordination in heterogeneous networks |
| CN102348216B (en) * | 2010-07-31 | 2015-12-09 | 华为技术有限公司 | A kind of interference processing method and device |
| US8964684B2 (en) * | 2010-11-16 | 2015-02-24 | Lg Electronics Inc. | Method and apparatus for providing control information |
| WO2013182228A1 (en) * | 2012-06-05 | 2013-12-12 | Nokia Siemens Networks Oy | Uplink control information signaling in inter-site downlink carrier aggregation scenarios |
| CN103581073B (en) * | 2012-07-21 | 2019-01-25 | 中兴通讯股份有限公司 | Interference elimination method and device |
| CN102820954B (en) * | 2012-08-15 | 2015-04-29 | 北京工业大学 | Method for reducing inter-cell interference of heterogeneous network |
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