CN106888497A - For wireless frame structure implementation method, system, base station, the terminal of cell searching - Google Patents
For wireless frame structure implementation method, system, base station, the terminal of cell searching Download PDFInfo
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- CN106888497A CN106888497A CN201510940312.5A CN201510940312A CN106888497A CN 106888497 A CN106888497 A CN 106888497A CN 201510940312 A CN201510940312 A CN 201510940312A CN 106888497 A CN106888497 A CN 106888497A
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- Prior art keywords
- frame
- common signal
- superframe
- descending
- subframe
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
Abstract
The invention discloses a kind of wireless frame structure implementation method, system, base station, terminal for cell searching, using the N times of frame of standard radio frame length as superframe, N >=2；Methods described includes：Base station is provided for sending the descending common signal subframe of cell common signal and/or channel information in the superframe；Carry out the transmission of descending sub frame using the superframe, and sub-frame of uplink reception；Terminal receives the superframe that base station sends, and using the descending common signal subframe in superframe, the cell common signal and/or channel information is detected when cell searching is carried out.
Description
Technical field
It is the present invention relates to the cell searching technology of mobile communication more particularly to a kind of for the wireless of cell searching
Frame structure implementation method, system, base station, terminal.
Background technology
Long Term Evolution (LTE, Long Term Evolution) be with OFDM (OFDM,
Orthogonal Frequency Division Multiplexing)/frequency division multiple access (FDMA, Frequency
Division Multiplexing Access) it is the technology of core, it is counted as " quasi- 4G " technology, with 2G and 3G
Technology is compared, and LTE possesses offer data transfer rate higher, improves cell capacity, reduce system delay, support
The advantages such as the MPS process of maximum 100km radiuses, therefore, the favor of common carrier is increasingly obtained, should
With scope from bullet train communication extension to ground-to-air communication, such as aircraft communications system.
Ground-to-air communication generally requires the super large radius of society of more than 100km, and switching is reduced with this, so that
Reduce networking cost.And for time-division Long Term Evolution (TD-LTE, Time Division Long Term
Evolution) standard, due to the introducing of super large coverage radius of cell, the spy in TD-LTE up-downgoings proportioning
Different subframe lengths and sub-frame of uplink number all can be problematic, for example：During 300km coverage radius of cell, extremely
The round-trip delay of 1.99ms is needed less, while Physical Random Access Channel (PRACH, Physical Random
Access Channel) Stochastic accessing at least need targeting sequencing (Preamble) time span of 5ms etc..
Additionally, when using hyperfrequency (3GHz~30GHz) as ground-to-air aircraft communication frequency range, due to
Hyperfrequency and the conventional super remote covering radius of ground-to-air communication, can bring super large path loss, in order to carry out at a high speed
Data communication, it is necessary to end side and base station side using wave beam forming narrow beam antenna, to strengthen transmitting-receiving two
The antenna gain of side.And base station side is precalculated using after narrow beam shaped aerial due to that can only be directed at certain
Good direction, therefore when aircraft initially enters the field of base station, terminal is in descending cell search process
In cannot obtain the beam forming gain of base station side antenna so that terminal cannot carry out cell synchronous and lead
The search of frequency signal, in this way, also cannot just initiate follow-up random access procedure.
Therefore, under hyperfrequency working frequency range, ultra-high velocity terminal translational speed and super large MPS process model
In enclosing, because signal transmission path loss becomes big, caused terminal can't detect cell downlink common signal and letter
How the problem in road, make base station side and end side not use narrow beam shaped aerial mode, can also carry out cell
Continue access process after the completion of measuring simultaneously, as problem demanding prompt solution.
The content of the invention
In order to solve the above technical problems, the embodiment of the invention provides a kind of radio frames knot for cell searching
Structure implementation method, system, base station, terminal, can realize in hyper band, ultraspeed, super large cell
In the case of covering, cell searching during communication is easily and effectively completed.
Wireless frame structure implementation method for cell searching provided in an embodiment of the present invention, by N times of standard without
The frame of line frame length is used as superframe, N >=2；Methods described includes：
It is provided for sending the descending common signal of cell common signal and/or channel information in the superframe
Subframe；
Carry out the transmission of descending sub frame using the superframe, and sub-frame of uplink reception.
In the embodiment of the present invention, methods described also includes：
Each public reference signal (CRS, Common are reduced in the descending common signal subframe
Reference Signal) symbol CRS numbers；And/or,
Resource units (RE, the Resource of CRS are not placed in the descending common signal subframe
Element cancel in) and place channel information.
In the embodiment of the present invention, methods described also includes：
According to radius of society, the length of continuously arranged special subframe (S subframes) is set.
In the embodiment of the present invention, methods described also includes：
According to radius of society and/or PRACH frame structures, continuously arranged sub-frame of uplink (U subframes) is set
Length.
In the embodiment of the present invention, the length that continuously arranged sub-frame of uplink U subframes are set, including：
The length for setting continuously arranged U subframes is more than or equal to 4ms.
The wireless frame structure implementation method for cell searching that another embodiment of the present invention is provided, N times is marked
The frame of accurate wireless frame length is used as superframe, N >=2；Methods described includes：
The superframe that base station sends is received, is provided with the superframe for sending cell common signal and/or channel
The descending common signal subframe of information；
Using the descending common signal subframe, terminal detects the public letter of the cell when cell searching is carried out
Number and/or channel information.
In the embodiment of the present invention, carry out the transmission of sub-frame of uplink using the superframe, and descending sub frame connects
Receive.
Base station provided in an embodiment of the present invention, including：
Frame setting unit, for using the N times of frame of standard radio frame length as superframe, N >=2；Described super
It is provided for sending the descending common signal subframe of cell common signal and/or channel information in frame；
Information transmission unit, the transmission for carrying out descending sub frame using the superframe, and sub-frame of uplink
Receive.
In the embodiment of the present invention, the frame setting unit is additionally operable to subtract in the descending common signal subframe
The CRS numbers of few each CRS symbol；And/or, do not place CRS in the descending common signal subframe
RE in cancel place channel information.
In the embodiment of the present invention, the frame setting unit is additionally operable to, according to radius of society, set continuous arrangement
Special subframe S subframes length.
In the embodiment of the present invention, the frame setting unit is additionally operable to according to radius of society and/or PRACH frames
Structure, sets the length of continuously arranged sub-frame of uplink U subframes.
In the embodiment of the present invention, the frame setting unit is additionally operable to set the length of continuously arranged U subframes
More than or equal to 4ms.
Terminal provided in an embodiment of the present invention includes：
Information transmission unit, the superframe for receiving base station transmission, is provided with small for sending in the superframe
The descending common signal subframe of area's common signal and/or channel information；
Detection unit, for utilizing the descending common signal subframe, terminal detection when cell searching is carried out
The cell common signal and/or channel information.
In the embodiment of the present invention, described information transmission unit is additionally operable to carry out sub-frame of uplink using the superframe
Transmission, and descending sub frame reception.
It is described above that wireless frame structure for cell searching provided in an embodiment of the present invention realizes that system includes
Base station and terminal.
In the technical scheme of the embodiment of the present invention, using the N times of frame of standard radio frame length as superframe, so,
Longer continuously arranged same type of subframe can be obtained, to meet super large MPS process the need for；Base
Stand and descending common signal for sending cell common signal and/or channel information is provided in the superframe
Frame；Carry out the transmission of descending sub frame using the superframe, and sub-frame of uplink reception.Terminal receives base station
The superframe of transmission, is provided with the descending public affairs for sending cell common signal and/or channel information in the superframe
Common signal subframe；Using the descending common signal subframe, terminal detects described small when cell searching is carried out
Area's common signal and/or channel information.It can be seen that, the embodiment of the present invention is based on special framing mode, can make end
End is in the hyper band of 3-30GHz, the coverage radius of cell of more than 100km and high-speed mobile
When being worked under the scene of (800km/h-1200km/h), base station side does not use pole narrow beam shaped aerial, eventually
End also can easily and effectively complete cell searching during communication；And the embodiment of the present invention can be suitable for LTE systems
System.
Brief description of the drawings
Fig. 1 is frame structure schematic diagram of the prior art；
Fig. 2 is a structure of time slot composition schematic diagram for descending sub frame in the prior art；
Fig. 3 is the schematic flow sheet of the wireless frame structure implementation method for cell searching of the embodiment of the present invention
One；
Fig. 4 is the frame structure schematic diagram of descending C subframes in the embodiment of the present invention；
Fig. 5 is the structural representation of the base station of the embodiment of the present invention；
Fig. 6 is the schematic flow sheet of the wireless frame structure implementation method for cell searching of the embodiment of the present invention
Two；
Fig. 7 is the structural representation of the terminal of the embodiment of the present invention；
Fig. 8 realizes the structural representation of system for the wireless frame structure for cell searching of the embodiment of the present invention
Figure.
Specific embodiment
In 3GPP TS36.211, the frame structure type 2 of definition is applied to time division duplex (Time Division
Duplex, TDD) pattern, the frame structure as shown in figure 1, each standard radio frame length 10ms,
Tf=307200Ts=10ms, each standard radio frame is by two a length of 153600TsThe field composition of=5ms；Often
Individual field is by five a length of 30720TsThe subframe composition of=1ms.Accordingly, what frame structure shown in Fig. 1 was supported is upper
Descending sub frame configuration is as shown in table 1.
Table 1
In table 1, to each subframe in a standard radio frame, " D " represents the subframe for downlink transfer,
" U " represents the subframe for uplink, and " S " is represented for downlink transfer special frames (DwPTS), up and down
The special subframe of guard time (GP) and uplink special frames (UpPTS) these three domains between row；
It is 30720T that the length of special subframe obeys DwPTS, GP and UpPTS total lengths=1ms；Per height
Frame i represents by two time slots 2i and 2i+1, a length of T of each time slotslot=15360Ts=0.5ms.Wherein, one
The structure composition of two time slots of individual descending sub frame is as shown in Figure 2.
According to the definition of 3GPP TS36.211, as shown in Fig. 2 there is four symbols to be in a descending sub frame
CRS symbols, every 6 RE are a CRS information in each symbol, and other RE can be used to put
Channel information is put, the channel information is Physical Downlink Control Channel (Physical Downlink Control
Channel, PDCCH) or Physical Control Format Indicator Channel (Physical Control Format Indicator
Channel, PCFICH) or physical mixed automatic re-transmission indicating channel (Physical Hybrid ARQ
Indicator Channel, PHICH) or Physical Downlink Shared Channel (Physical Downlink Shared
Channel, PDSCH) etc. channel information.
Based on the analysis to existing frame structure, the embodiment of the present invention is in order to solve in hyperfrequency, ultrahigh speed, super
Under the scene of big cell coverage area, signal transmission path loss increases brought problem, can in framing mode
To consider several aspects：Firstth, multiple standard radio frames form superframe；Secondth, set in the superframe
Descending common signal subframe (C subframes) for sending cell common signal and/or channel information；3rd,
The length of special subframe is adjustable-length；4th, the length of continuous sub-frame of uplink is adjustable-length；5th,
The CRS numbers of each CRS symbol are reduced in the descending common signal subframe；And/or, under described
Cancel in the RE for not placing CRS in row common signal subframe and place channel information.
In embodiments of the present invention, using the N times of frame of standard radio frame length as superframe, N >=2, described
It is provided for sending the descending common signal subframe of cell common signal and/or channel information in superframe；Using institute
Stating superframe carries out the transmission of descending sub frame, and sub-frame of uplink reception.
The present invention is described in further detail with reference to the accompanying drawings and examples, and the embodiment of the present invention is applicable
In LTE system, the hyper band of 3-30GHz, the coverage radius of cell of more than 100km, terminal are operated in
The translational speed of side is 800km/h-1200km/h, and base station side is not used under the scene of pole narrow beam shaped aerial
Cell searching.
Fig. 3 is that the flow of the wireless frame structure implementation method for cell searching provided in an embodiment of the present invention is shown
It is intended to one, the wireless frame structure implementation method for cell searching in this example is applied to base station side, such as schemes
Shown in 3, the wireless frame structure implementation method for cell searching provided in an embodiment of the present invention includes following step
Suddenly：
Step 301：Using the N times of frame of standard radio frame length as superframe, N >=2；Set in the superframe
Put the descending common signal subframe for sending cell common signal and/or channel information.
In the embodiment of the present invention, the wireless frame structure of new type, referred to as superframe (Hyper Frame) are defined,
One length of superframe is that (n is integer to n*10ms, and n >=2), as existing radio frames (referred to as standard
Radio frames) 10ms integral multiple, so, longer same type of continuous subframes set can be obtained, with
Meet super large MPS process needs.For example, superframe can obtain longer descending sub frame D sub-frame sets, from
And descending time slot utilization rate higher is obtained, improve downlink throughput capacity.
In the embodiment of the present invention, descending common signal subframe (C subframes) is newly defined, C subframes are descending sub frame,
Dedicated for sending cell common signal and channel information, C subframes are used for terminal initial and access cell and cell
Cell searching during switching.
In the embodiment of the present invention, the CRS of each CRS symbol is reduced in the descending common signal subframe
Number；And/or, cancel in the RE for not placing CRS in the descending common signal subframe and place channel
Information.
Specifically, for the D subframes of down user data, due to the super large path loss that hyperfrequency brings, base station
Side can obtain gain using high-gain aerial modes such as narrow beam shaped aerials.But narrow beam is simultaneously
The coverage of cell common signal and channel is limited, so part is not in narrow beam coverage or covers
The terminal at lid edge just can't detect the signal of the cell, and cannot also complete access carries out business.
Therefore, C subframes are used for the search of initial zone of terminal.At the C subframe moment, base station side can be used
Broad beam (such as 60~120 ° of covering) antenna, to meet the access of all terminals in whole cell range.Adopt
After broad beam antenna, antenna gain reduces 15dB compared to narrow beam antenna, therefore descending sub frame structure is
Can not allow terminal normally detect Reference Signal Received Power (Reference Signal Received Power,
) and the common signal channel such as descending PDCCH RSRP.Can now be realized by the C subframe structures for customizing
The detection of the key signal/channel such as cell reference signals, PDCCH.
According to the definition of 3GPP TS36.211, there are four symbols in a descending sub frame for CRS symbols, often
Every 6 RE it is a CRS information in individual symbol, and other RE can be used to place
PDCCH/PFCICH/PHICH/PDSCH channel informations.And in the C subframes of the embodiment of the present invention, can
With by reducing the CRS numbers of each symbol or in the RE for not placing CRS information also not placing any
The mode of other channel informations lifts the transmit power of CRS signals.To realize base station side during super large path loss
Under broad beam antenna scene, CRS signals also can normally be detected by terminal.Further, since air-ground communication is straight
Channel characteristics based on visual path, in a sub- frame in, frequency deviation change is very small, therefore can reduce CRS symbols
Number number, for example 2 symbols are reduced to from 4 symbols, to increase PDCCH and PDSCH (SIB
The common signal channels such as message, Stochastic accessing Msg2) capacity.
And for PDCCH channels, connect to be lifted in the case of super large path loss and the small gain of broad beam antenna
Receipts ability, (can be more than 3 using small bandwidth (less than the RB numbers of system bandwidth) multi-OFDM symbol
Individual OFDM symbol) the method for salary distribution, such as PDCCH region is only with 5 RB but occupies 5 symbols
Number；In this way, the power of remaining RB in each OFDM symbol can increase to 5
On the PDCCH of RB, to dramatically increase the demodulation ability of PDCCH channels.
By taking TD-LTE standards as an example, in superframe described in the embodiment of the present invention, the proportioning of uplink and downlink subframe,
As shown in table 2：
Table 2
Step 302：Carry out the transmission of descending sub frame using the superframe, and sub-frame of uplink reception.
In the embodiment of the present invention, according to radius of society, the length of continuously arranged special subframe S subframes is set.
Specifically, the adjustable length that continuously arranged special subframe (S subframes) is gathered in superframe, is such as full
The super large MPS process of sufficient 300km radiuses needs, and the length of special subframe set definition is 2ms；Further
, the length of special subframe set can be elongated further, be adjusted according to different districts radius.
In the embodiment of the present invention, according to radius of society and/or PRACH frame structures, set on continuously arranged
The length of row subframe U subframes.In one embodiment, the length for setting continuously arranged U subframes is more than
Equal to 4ms.
Specifically, the duration of continuously arranged sub-frame of uplink U sub-frame sets is adjustable, and support is more than or equal to
4ms：Such as it is the up PRACH channels needs for meeting 300km radius of societies, the length of U sub-frame sets
It is 5ms；Further, the length of continuously arranged sub-frame of uplink U sub-frame sets can be according to different districts
The difference of radius and PRACH frame structures is adjusted.
The design of the special S number of subframes and up U number of subframes that are proposed by the embodiment of the present invention, can
To meet the demand of the conversion of the uplink and downlink timeslot under super large radius of society and Stochastic accessing.By reducing control
Channel occupancy RB numbers and the mode of reference signal is only sent in symbol where reference signal, can allow control
Channel processed and reference signal obtain very big power gain, make up the big path loss that high band causes.And pass through
The special reference signal mapping proposed for this programme use it is special when offset estimation and compensation, Ke Yi
The big frequency deviation that high band is introduced at a high speed is accurately tracked and compensated.Therefore, the embodiment of the present invention is based on special
Framing mode, terminal works can be made in the hyper band of 3-30GHz, the MPS process half of more than 100km
Under footpath, under the scene of high-speed mobile (800km/h-1200km/h), and base station side is not required to using pole narrow beam
Shaped aerial, terminal just can easily and effectively complete cell searching during communication；In addition, the embodiment of the present invention
LTE system can be applied to.
As shown in figure 4, Fig. 4 is the frame structure under whole bandwidth, wherein, CC zone are public control unit
Point；PDSCH zone are physical down shared data part；PSS is master sync signal part；SSS is attached
Synchronizing signal part；CRS is cell reference signals part.In the C subframes that the embodiment of the present invention is set,
Can be by reducing in each described subframe CRS numbers or also not placing in the RE for not placing CRS
When the mode of any other channel information is to lift the transmit power of CRS signals, and then realize super large path loss
Under base station side broad beam antenna scene, CRS signals also can normally be detected by terminal.
Further, since the channel characteristics based on the direct-view footpath of ground-to-air communication, in a sub- frame in time-frequency frequency deviation
Change is very small, therefore, it can reduce the number of CRS symbols, for example, be reduced to 2 symbols from 4 symbols
Number, to increase PDCCH and PDSCH (system information block (SIB) message, Stochastic accessing (Msg2)
Deng common signal channel) capacity.
And for PDCCH channels, connect to be lifted in the case of super large path loss and the small gain of broad beam antenna
Receipts ability, (can be more than 3 using small bandwidth (less than the RB numbers of system bandwidth) multi-OFDM symbol
Individual OFDM symbol) the method for salary distribution, such as PDCCH region is only with 5 RB but occupies 5 symbols
Number；In this way, the power of remaining RB in each OFDM symbol can increase to 5
On the PDCCH of RB, to dramatically increase the demodulation ability of PDCCH channels.
Provided by the present invention for the wireless frame structure implementation method of cell searching, based on special framing mode,
Under different LTE antenna modes, using different subframe structures, solve hyper band (3~30GHz),
During overlength distance (radius is more than 100km) covering communication, because signal transmission path loss becomes big, cause terminal
Can't detect the problem of cell downlink common signal and channel.
To realize the above method, the embodiment of the present invention additionally provides a kind of base station, as shown in figure 5, the dress
Put including：
Frame setting unit 501, for using the N times of frame of standard radio frame length as superframe, N >=2；Institute
State the descending common signal subframe for being provided for sending cell common signal and/or channel information in superframe.
Information transmission unit 502, the transmission for carrying out descending sub frame using the superframe, and up son
The reception of frame.
Here, the frame setting unit 501, is additionally operable to reduce each in the descending common signal subframe
The CRS numbers of CRS symbols；And/or, do not place CRS's in the descending common signal subframe
Cancel in RE and place channel information.
The frame setting unit 501, is additionally operable to, according to radius of society, set continuously arranged special subframe S
The length of subframe.
The frame setting unit 501, is additionally operable to according to radius of society and/or PRACH frame structures, the company of setting
The length of the sub-frame of uplink U subframes of continuous arrangement.
The frame setting unit 501, the length for being additionally operable to set continuously arranged U subframes is more than or equal to 4ms.
Base station provided in an embodiment of the present invention, defines and a kind of is obtained in that bigger continuous subframes set duration
Superframe, the size of the superframe is the integral multiple of 10ms standard radio frames, and frame setting unit sets in superframes
Descending common signal subframe is put, the descending common signal subframe is used to send cell common signal and channel,
So, using the descending common signal subframe, terminal realizes cell searching when being initially accessed and switching.
In addition, in actual applications, the frame setting unit 501, information transmission unit 502 can be by centers
Processor (Central Processing Unit, CPU), microprocessor (Micro Processor Unit, MPU),
Digital signal processor (Digital Signal Processor, DSP) or field programmable gate array (Field
Programmable Gate Array, FPGA) etc. realize.
Base station provided in an embodiment of the present invention, by using the N times of frame of standard radio frame length as superframe and
Same type subframe continuous arrangement；It is provided for sending the descending common signal subframe of cell common signal and channel；
Carry out the transmission of descending sub frame using the superframe, and sub-frame of uplink reception.Therefore, the present invention can
Suitable for LTE system, the hyper band of 3-30GHz, the MPS process half of more than 100km can be operated in
Under footpath, under end side high-speed mobile (800km/h-1200km/h), base station side is not assigned using pole narrow beam
During shape antenna, the cell searching of terminal.
Fig. 6 is that the flow of the wireless frame structure implementation method for cell searching provided in an embodiment of the present invention is shown
It is intended to two, using the N times of frame of standard radio frame length as superframe, N >=2；Being searched for cell in this example
The wireless frame structure implementation method of rope is applied to end side, as shown in fig. 6, the nothing for cell searching
Line frame structure implementation method is comprised the following steps：
Step 601：The superframe that base station sends is received, is provided with the superframe for sending the public letter of cell
Number and/or channel information descending common signal subframe.
Step 602：Using the descending common signal subframe, terminal detects described when cell searching is carried out
Cell common signal and/or channel information.
Terminal carries out the transmission of sub-frame of uplink using the superframe, and descending sub frame reception.
Fig. 7 is the structure composition schematic diagram of the terminal of the embodiment of the present invention, as shown in fig. 7, the terminal bag
Include：
Information transmission unit 701, the superframe for receiving base station transmission, is provided with for sending out in the superframe
Send the descending common signal subframe of cell common signal and/or channel information；
Detection unit 702, for utilizing the descending common signal subframe, terminal is when cell searching is carried out
Detect the cell common signal and/or channel information.
Described information transmission unit 701, is additionally operable to be carried out using the superframe transmission of sub-frame of uplink, and
The reception of descending sub frame.
In actual applications, described information transmission unit 701, detection unit 702 can be by central processing units
(Central Processing Unit, CPU), microprocessor (Micro Processor Unit, MPU), number
Word signal processor (Digital Signal Processor, DSP) or field programmable gate array (Field
Programmable Gate Array, FPGA) etc. realize.
Fig. 8 realizes that the structure composition of system is shown for the wireless frame structure for cell searching of the embodiment of the present invention
It is intended to, as shown in figure 8, the system includes：
Base station 81, for using the N times of frame of standard radio frame length as superframe, N >=2；In the superframe
It is provided for sending the descending common signal subframe of cell common signal and/or channel information；Using the superframe
Carry out the transmission of descending sub frame, and sub-frame of uplink reception.
In one implementation, the CRS of each CRS symbol is reduced in the descending common signal subframe
Number；And/or, cancel in the RE for not placing CRS in the descending common signal subframe and place channel
Information.
In another implementation, according to radius of society, continuously arranged special subframe S subframes are set
Length.
In another implementation, according to radius of society and/or PRACH frame structures, continuous arrangement is set
Sub-frame of uplink U subframes length.In another implementation, the length of continuously arranged U subframes is set
Degree is more than or equal to 4ms.
Terminal 82, the superframe for receiving base station transmission, is provided with public for sending cell in the superframe
The descending common signal subframe of signal and/or channel information；Using the descending common signal subframe, terminal exists
Carry out detecting the cell common signal and/or channel information during cell searching.
Here, terminal 82, are additionally operable to be carried out using the superframe transmission of sub-frame of uplink, and descending sub frame
Reception.
Between technical scheme described in the embodiment of the present invention, in the case where not conflicting, can be in any combination.
In several embodiments provided by the present invention, it should be understood that disclosed method and smart machine,
Can realize by another way.Apparatus embodiments described above are only schematical, for example,
The division of the unit, only a kind of division of logic function, can there is other division side when actually realizing
Formula, such as：Multiple units or component can be combined, or be desirably integrated into another system, or some features can
To ignore, or do not perform.In addition, the coupling or straight each other of shown or discussed each part
Connect coupling or communication connection can be the INDIRECT COUPLING or communication connection of equipment or unit by some interfaces,
Can be electrical, machinery or other forms.
It is above-mentioned as separating component illustrate unit can be or may not be it is physically separate, as
The part that unit shows can be or may not be physical location, you can positioned at a place, also may be used
To be distributed on multiple NEs；Part or all of unit therein can be according to the actual needs selected
Realize the purpose of this embodiment scheme.
In addition, each functional unit in various embodiments of the present invention can be fully integrated into a second processing list
In unit, or each unit is individually as a unit, it is also possible to two or more unit collection
Into in a unit；Above-mentioned integrated unit can both be realized in the form of hardware, it would however also be possible to employ hard
Part adds the form of SFU software functional unit to realize.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited to
This, any one skilled in the art the invention discloses technical scope in, can readily occur in
Change or replacement, should all be included within the scope of the present invention.
Claims (15)
1. a kind of wireless frame structure implementation method for cell searching, it is characterised in that by N times of standard
The frame of wireless frame length is used as superframe, N >=2；Methods described includes：
It is provided for sending the descending common signal of cell common signal and/or channel information in the superframe
Subframe；
Carry out the transmission of descending sub frame using the superframe, and sub-frame of uplink reception.
2. method according to claim 1, it is characterised in that methods described also includes：
The CRS numbers of each public reference signal CRS symbols are reduced in the descending common signal subframe；
And/or,
Cancel in the resource units RE for not placing CRS in the descending common signal subframe and place channel
Information.
3. method according to claim 1, it is characterised in that methods described also includes：
According to radius of society, the length of continuously arranged special subframe S subframes is set.
4. method according to claim 1, it is characterised in that methods described also includes：
According to radius of society and/or Physical Random Access Channel PRACH frame structures, set on continuously arranged
The length of row subframe U subframes.
5. method according to claim 4, it is characterised in that the continuously arranged up son of setting
The length of frame U subframes, including：
The length for setting continuously arranged U subframes is more than or equal to 4ms.
6. a kind of wireless frame structure implementation method for cell searching, it is characterised in that by N times of standard
The frame of wireless frame length is used as superframe, N >=2；Methods described includes：
The superframe that base station sends is received, is provided with the superframe for sending cell common signal and/or channel
The descending common signal subframe of information；
Using the descending common signal subframe, terminal detects the public letter of the cell when cell searching is carried out
Number and/or channel information.
7. method according to claim 6, it is characterised in that methods described also includes：
Carry out the transmission of sub-frame of uplink using the superframe, and descending sub frame reception.
8. a kind of base station, it is characterised in that the base station includes：
Frame setting unit, for using the N times of frame of standard radio frame length as superframe, N >=2；Described super
It is provided for sending the descending common signal subframe of cell common signal and/or channel information in frame；
Information transmission unit, the transmission for carrying out descending sub frame using the superframe, and sub-frame of uplink
Receive.
9. base station according to claim 8, it is characterised in that the frame setting unit, is additionally operable to
The CRS numbers of each CRS symbol are reduced in the descending common signal subframe；And/or, described descending
Cancel in the RE for not placing CRS in common signal subframe and place channel information.
10. base station according to claim 8, it is characterised in that the frame setting unit, is additionally operable to
According to radius of society, the length of continuously arranged special subframe S subframes is set.
11. base stations according to claim 8, it is characterised in that the frame setting unit, are additionally operable to
According to radius of society and/or PRACH frame structures, the length of continuously arranged sub-frame of uplink U subframes is set.
12. base stations according to claim 11, it is characterised in that the frame setting unit, are additionally operable to
The length for setting continuously arranged U subframes is more than or equal to 4ms.
13. a kind of terminals, it is characterised in that the terminal includes：
Information transmission unit, the superframe for receiving base station transmission, is provided with small for sending in the superframe
The descending common signal subframe of area's common signal and/or channel information；
Detection unit, for utilizing the descending common signal subframe, terminal detection when cell searching is carried out
The cell common signal and/or channel information.
14. terminals according to claim 13, it is characterised in that described information transmission unit, also use
In the transmission that sub-frame of uplink is carried out using the superframe, and descending sub frame reception.
A kind of 15. wireless frame structures for cell searching realize system, it is characterised in that the system bag
Include the base station described in any one of claim 8 to 12, and the terminal described in claim 13 or 14.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510940312.5A CN106888497B (en) | 2015-12-15 | 2015-12-15 | Method, system, base station and terminal for realizing radio frame structure for cell search |
| PCT/CN2016/085148 WO2016197921A1 (en) | 2015-12-15 | 2016-06-07 | Wireless frame transmission method for cell search, system, base station, and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510940312.5A CN106888497B (en) | 2015-12-15 | 2015-12-15 | Method, system, base station and terminal for realizing radio frame structure for cell search |
Publications (2)
| Publication Number | Publication Date |
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| CN106888497A true CN106888497A (en) | 2017-06-23 |
| CN106888497B CN106888497B (en) | 2020-12-04 |
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| CN201510940312.5A Active CN106888497B (en) | 2015-12-15 | 2015-12-15 | Method, system, base station and terminal for realizing radio frame structure for cell search |
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| Country | Link |
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| CN (1) | CN106888497B (en) |
| WO (1) | WO2016197921A1 (en) |
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| CN109286938A (en) * | 2017-07-19 | 2019-01-29 | 中兴通讯股份有限公司 | A kind of method, base station and terminal for transmitting signal |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2016197921A1 (en) | 2016-12-15 |
| CN106888497B (en) | 2020-12-04 |
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