CN104936256A - Small-cell base station discovery signal generation and configuration methods and related devices - Google Patents
Small-cell base station discovery signal generation and configuration methods and related devices Download PDFInfo
- Publication number
- CN104936256A CN104936256A CN201410102261.4A CN201410102261A CN104936256A CN 104936256 A CN104936256 A CN 104936256A CN 201410102261 A CN201410102261 A CN 201410102261A CN 104936256 A CN104936256 A CN 104936256A
- Authority
- CN
- China
- Prior art keywords
- signal
- small
- base station
- frequency
- cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses generation and configuration methods used for a discovery signal DS used for a small-cell scene, and related devices. The DS generation method comprises the steps of: generating a DS-SS which is used for time frequency synchronization and serves as one part of the discovery signal; and generating a DS-RS which is used for channel measurement and serves as the other part of the discovery signal. The DS configuration method comprises the steps of: determining configuration parameters of the discovery signal DS; sand ending the configuration parameters to adjacent base stations around the small-cell base station through background links, wherein the configuration parameters are used for indicating at least one item of the following configuration items: (1) the frequency difference between the frequency center of the DS-SS and the frequency center of a transmission bandwidth, (2) the pattern, density and position of the DS-SS distributed on a time frequency, (3) an emission period of the DS-SS and/or the DS-RS, emission times in a single period and/or an emission time offset, and (4) whether a transmission system is FDD or TDD.
Description
Technical field
The present invention relates to wireless communication technology field, more specifically, relate to small-cell base station and find production method and collocation method and the relevant device thereof of signal DS and utilize small-cell to find the community discovery procedure of signal.
Background technology
Modern mobile radio system presents two distinguishing features, and one is broadband high-speed rate, and the bandwidth of such as forth generation mobile radio system can reach 100MHz, and downstream rate is up to 1Gbps; Two is mobile interchange, has promoted the emerging services such as mobile Internet access, mobile video program request, online navigation.These two features propose high requirement to wireless mobile telecommunication technology, mainly contain: transmitting signal, distributed/centralized signal transacting etc. in superelevation rate wireless transmission, interregional AF panel, movement.In the enhancing forth generation (4G) and the 5th generation (5G) mobile radio system in future, in order to meet above-mentioned growth requirement, various corresponding key technology starts to be suggested and to prove, and is worth researcher in this field's extensive concern.
In October, 2007, International Telecommunication Union (ITU) ratifies global microwave internet access system (WiMax, Worldwide Interoperability for Microwave Access) becomes the 4th 3G system standard.This occurs in the event in 3G latter stage in epoch, is actually the preview of 4G Standard wars war.In fact, in order to tackle with the challenge of WLAN (wireless local area network) and the WiMax Wireless IP Technology stream that is representative, from 2005, third generation 3GPP organized and just sets about carrying out brand-new system upgrade, the i.e. standardization effort of long evolving system (LTE, Long TermEvolution).This be one based on the standard four generation system of orthogonal frequency division multiplexi (OFDM, Orthogonal Frequency Division Multiplexing), at the beginning of 2009, release the first edition, and started commercialization in the whole world successively in 2010.Meanwhile, 3GPP tissue is about forth generation mobile radio system (4G, the FourthGeneration) standardization formulation work also start the first half of the year in 2008, this system is called advanced long evolving system (LTE-A, Long Term EvolutionAdvanced).The key standardisation document of the physical layer procedure of this system completes at the beginning of 2011.In November, 2011, ITU is organized in Chongqing in China and announces, lte-a system and WiMax system are two official standards of 4G system.At present, the commercial process of lte-a system is just progressively launched in the world.
Although the communication service that the forth generation mobile radio system being representative with lte-a system and WiMax system can provide higher rate for user and better experience, they still fully can not meet the user's request of the coming years and more than ten years.At present, the number of users of mobile communication system is about 5,500,000,000, according to estimates, will rise to 7,300,000,000 to this numeral in 2015.Wherein, the growth of smart phone user number is particularly remarkable.In 2011, intelligent mobile phone terminal was in the world about 4.28 hundred million, and by 2015, this numeral will be doubled and redoubled to 1,000,000,000.The universal quick growth having driven wireless mobile communications speed of powerful smart mobile phone.Recent years, the wireless communication rate of global range grows steadily with the trend of average annual 2 times.Trend like this, after 10 years, mobile radio system must have the speed more than 1000 times to promote than current system can meet the primary demand of future customer in traffic rate.Certainly, described speed mainly refers to data service (accounting for about ninety percent of total traffic at present), as synchronous in the download of smartphone software, real-time navigation, personal information high in the clouds with share etc.And speech business is limited by population increases relatively slow objective condition, there will not be in coming 10 years and increase substantially.
Except the challenge that 1000 times of speed increase, another challenge comes from the rise of mobile Internet.At present, the linking Internet of 70% initiated by mobile terminal.Coming 10 years will be the brand-new opportunity period of IT industry, and its main chance is, traditional PC the Internet has been moved the Internet gradually and has replaced.So new user habit expedites the emergence of out a series of business new model, as towards handheld communication devices and touch-screen software development, based on individual location social networks, centered by individual data cloud management etc.And mobile Internet affects major embodiment both ways for mobile radio system.The first, mobile video data traffic significantly increases, and expects 2016, and it will account for about 66% of total data flow.The business that this real-time grade is relatively high, the reliability for mobile radio system proposes high requirement.The second, in future, most of mobile data communication will occur in indoor and hot spot region, community, and this covering for mobile radio system it is also proposed challenge.
In addition, to the year two thousand twenty, will there be the machine communication equipment of 20,000,000,000 in the whole world, and its data traffic than will have the growth of 500% at present.How design system is to support the machine communication equipment of substantial amounts, is also a problem needing further investigation.
According to the challenge in Future Ten year, for the forth generation mobile radio system strengthened, roughly there is some growth requirement following:
● higher WiMAX speed, and the hot spot region, community of emphasis optimization local
● improve Consumer's Experience further, need the communication service optimizing cell border areas especially
● consider that usable spectrum can not have the expansion of 1000 times, therefore need to continue the new technology that research can improve spectrum utilization efficiency
● the frequency spectrum (5GHz, even higher) of high band will come into operation, to obtain larger communication bandwidth
● the collaborative work of existing network (2G/3G/4G, WLAN, WiMax etc.), with sharing data flow
● for different business, application and service certain optimisation
● strengthening system supports the ability of large-scale machines communication
● flexibly, intelligence and the network planning of cheapness with arrange net
● design is with the battery consumption of the power consumption and subscriber equipment of saving network
In order to realize above-mentioned growth requirement, in June, 2013, international third generation Partnership Program (3GPP) is organized in Slovenia and has held a special task meeting, and the key technology of the forth generation mobile radio system strengthened is discussed.In this meeting, deliver and discuss 42 parts of motions altogether, the key technology of being finally shortlisted for mainly contains 3, is respectively: enhancement mode small-cell technology, three-dimensional MIMO technology and the multipoint cooperative communication technology strengthened.
Wherein enhancement mode small-cell technology is a method at hot zones raising spectrum utilization efficiency.In traditional cell structure, in order to avoid interference between base station, the space length being separated by certain is arranged.And enhancement mode small-cell technology is in traditional cell structure, add small-cell base station intensive in a large number at hot zones, the higher availability of frequency spectrum and transmission rate are provided.Enhancement mode small-cell technology has three to study point in present stage: 1. the interference coordination technique of enhancement mode small-cell, 2. the discovery Design of Signal of enhancement mode small-cell, 3. the synchronization mechanism design of enhancement mode small-cell.
Patent application of the present invention is paid close attention to generation and the collocation method of the discovery signal in above-mentioned enhancement mode small-cell and is utilized small-cell to find the community discovery procedure of signal.
In the discovery technique of existing community, list of references 3GPP TS36.211V11.4.0 (2013-09) gives existing base station discovery mechanism.It mainly comprises for the main synchronizing sequence PSS of clock synchronous and secondary synchronization sequences SSS signal (saving described 6.11) and the cell reference signals CRS signal (described in save 6.10) for RRM.Subscriber equipment by measuring the signals such as PSS, SSS, CRS on time-domain and frequency-domain, carries out synchronous and community with base station and finds, then access.But because the structure comparison of conventional cell is sparse, existing discover method can produce larger signal and mutually disturb under the scene of the intensive layout of enhancement mode small-cell, impact finds the normal work of signal.
Summary of the invention
The object of the invention is to: design a kind of production method and collocation method and relevant device thereof of the discovery signal for small-cell scene and utilize small-cell to find the community discovery procedure of signal, to overcome above-mentioned the topic existed in prior art.
According to a first aspect of the invention, propose a kind of production method of the discovery signal for small-cell scene, comprising: produced by small-cell base station and be used for the synchronous synchronizing signal DS-SS of temporal frequency, as a part for described discovery signal; And produced the reference signal DS-RS being used for channel measurement by small-cell base station, as another part of described discovery signal.The feature of the discovery signal of generation like this is:
1. described in, find that signal (referred to as DS) is made up of two parts, one is for the synchronous synchronizing signal (referred to as DS-SS signal) of temporal frequency, and another is the reference signal (referred to as DS-RS signal) for providing basic channel measurement.
2. small-cell base station launches described discovery signal with certain period distances, no matter this base station is in the state such as work, sleep.
3. DS-SS signal described in feature 1 is narrow band signal compared to transmission bandwidth, and it comprises DS-SS-P signal and DS-SS-S signal.DS-SS-P signal uses Zadoff-Chu sequence sequential coding on frequency domain.DS-SS-S signal uses pseudorandom BPSK to encode on frequency domain.DS-SS comprises the number information of small-cell.
4. DS-SS-P signal described in feature 3 and DS-SS-S signal are launched respectively in time domain.It is frequency division multiplexing (FDD) or time division multiplexing (TDD) that transmission interval and mutual context may be used for differentiating transmission system.
5. DS-RS signal described in feature 1 on whole transmission bandwidth evenly or standard be uniformly distributed.It uses pseudorandom QPSK to encode on frequency domain.
6. the pattern that described in feature 1, DS-RS signal distributes in temporal frequency, density, position can configure or fix.
7. the determination mode of the pattern that described in feature 6, DS-RS signal distributes in temporal frequency, density, position comprises: (1) gets fixed value, (2) configured by base station or upper layer entity, (3) number based on small-cell, calculated by a fixed function, (4) based on virtual small-cell numbering, calculated by a fixed function.
8. the frequency range may used when transmission bandwidth described in feature 3,5 refers to and transmits after subscriber equipment passes through to find signal discovery small-cell base station.
9. the center frequency of DS-SS signal described in feature 1 and the center frequency of transmission bandwidth described in feature 8 are without the need to overlapping.A frequency-splitting can be had between Liang Ge center.This frequency-splitting can configure or fix.In order to not conflict with normal temporal frequency synchronizing signal, DS-SS signal center dot frequency not should be the integral multiple of 100kHz.
10. the determination mode of the frequency-splitting of the center frequency of DS-SS signal and the center frequency of transmission bandwidth described in feature 9 comprises: (1) gets fixed value, (2) configured by base station or upper layer entity, (3) number based on small-cell, calculated by a fixed function, (4) based on virtual small-cell numbering, calculated by a fixed function.The scope of frequency-splitting is 0kHz-20MHz.
Described in 11. features 1, DS-SS signal and DS-RS signal have the time migration on launch time.Time migration both them can be identical, also can be different.Time migration can be fixing, also can be configuration.Identical time migration means that they are sent simultaneously, and different time migrations means that they are by difference alternate emission.
Described in 12. features 11, the determination mode of the time migration of DS-SS signal or DS-RS signal comprises: (1) gets fixed value, (2) configured by base station or upper layer entity, (3) number based on small-cell, calculated by a fixed function, (4) based on virtual small-cell numbering, calculated by a fixed function.The scope of time migration is 0.05ms-40ms.
Described in 13. features 1, DS-SS signal and DS-RS signal have the identical or different transmitting cycles.This cycle can be fixing, also can be configuration.
Described in 14. features 13, the determination mode in the transmitting cycle of DS-SS signal or DS-RS signal comprises: (1) gets fixed value, (2) configured by base station or upper layer entity, (3) number based on small-cell, calculated by a fixed function, (4) based on virtual small-cell numbering, calculated by a fixed function.The scope in cycle is 10ms-1000ms.
Described in 15. features 1, DS-SS signal and DS-RS signal can have multiple time migration.Namely DS-SS signal or DS-RS signal send repeatedly in one-period.DS-SS signal can be identical with emitting times in the monocycle that DS-RS signal has, and also can be different.In this monocycle, emitting times can be fixing, also can be configuration.
In the monocycle of DS-SS signal or DS-RS signal described in 16. features 15, the determination mode of emitting times comprises: (1) gets fixed value, (2) configured by base station or upper layer entity, (3) number based on small-cell, calculated by a fixed function, (4) based on virtual small-cell numbering, calculated by a fixed function.The scope of number is 1-10.
According to a second aspect of the invention, propose a kind of collocation method of the discovery signal for small-cell scene, comprising: the configuration parameter being determined to find signal DS by small-cell base station or upper layer entity; And send described configuration parameter by small-cell base station or upper layer entity by the neighbor base stations of backstage chain road direction around it.Some parameters that the configuration parameter of described discovery signal is used in the discovery signal produced according to a first aspect of the present invention are the occasions that can configure, or the position of DS-SS-P signal in the discovery signal produced according to a first aspect of the present invention and DS-SS-S signal is not used for the occasion distinguishing FDD/TDD.This configuration parameter is used to indicate at least one item in the following configuration:
1. the transmitting cycle of DS/DS-SS/DS-RS signal described in first aspect present invention feature 13,
2. emitting times in the DS/DS-SS/DS-RS signal monocycle described in first aspect present invention feature 15,
3. the time migration of DS/DS-SS/DS-RS signal described in first aspect present invention feature 11,
4. the frequency-splitting of the center frequency of DS-SS signal and the center frequency of transmission bandwidth described in first aspect present invention feature 9,
5. the pattern that described in first aspect present invention feature 6, DS-RS signal distributes in temporal frequency, density, position,
6. transmission system is the instruction of frequency division multiplexing (FDD) or time division multiplexing (TDD).
The parameter of described DS/DS-SS/DS-RS signal refers to that these parameters can be: DS-SS signal uses identical parameter value with DS-RS signal, namely configures a parameter value to DS signal; Or DS-SS signal uses different parameter values from DS-RS signal, namely give the parameter value that DS-SS signal is different from DS-RS signal configures respectively.
The form of expression of described configuration parameter 1-5 can be:
1. the concrete numerical value based on defined unit,
2. based on the index sequence number of predefine form,
3. based on the index sequence number to the predefine form that base station is numbered or virtual numbering is relevant,
4. the function of time, occurrence changes in time,
5. to the function of time that base station is numbered or virtual numbering is relevant,
6. bitmap.
Described configuration parameter can after combination in any with the index sequence number table based on predefine form not.
Described configuration parameter 1-5 can represent with bitmap after combination in any.
According to a third aspect of the invention we, a kind of discovery procedure for small-cell scene is proposed.This discovery procedure comprises the following steps:
Step 1: small-cell base station launches discovery signal according to discovery signal configures parameter.Find that the configuration parameter of signal is in small-cell base station initialization, or by small-cell base station itself when reconfiguring, or the controlled entity on upper strata determines.
Step 2: after the discovery signal configures parameter of small-cell base station determines, these parameters are by the neighbor base stations given by backstage link transmission around it.
Step 3: when neighbor base stations to receive the discovery signal configures parameter of transmission by backstage, it finds by using the transmission of one of following two methods the user that signal configures parameter accesses to it:
(1). this base station is added these and is found the configuration parameter information of signal to it for broadcasting in the system information of frequently same or adjacent frequency base station.This base station periodic broadcasting sends the subscriber equipment that these system informations access to it.
(2). this base station is added these and is found that the information of signal is in the control signal of adding the subscriber equipment being transmitted to its access to.Find that the configuration parameter information of signal issues subscriber equipment in the process of emissioning controling signal.
Step 4: subscriber equipment by receive that its access base station sends for broadcasting with frequently or the system information of adjacent frequency base station or receive the control signal of subscriber equipment, obtain the discovery signal configures parameter of neighbours' small-cell base station, thus according to the discovery signal configures parameter of the neighbours' small-cell base station received, monitoring discovery signal on the time point of correspondence, carries out community discovery.
The base station of not refering in particular in above-mentioned steps comprises small-cell base station and common macro base station.
The link of backstage described in step 2 comprises: 1. the direct Background communication between base station and base station, 2. base station A and its upper layer entity A communication, upper layer entity A and upper layer entity B communication, upper layer entity B and base station B communication.
Time point corresponding described in step 5 refers to the time point having DS-SS signal or DS-RS signal to launch in second aspect present invention represented by parameter 1-3.
Utilize technical scheme of the present invention, at least following beneficial effect can also be obtained:
● compatible with existing community discovery mechanism;
● configuration has very strong flexibility;
● can multiplexing existing signal, reduce overhead;
● find that the interference between signal is less, improve detection probability and precision of channel estimation;
● less to the change of existing system agreement, be easy to realize.
Accompanying drawing explanation
By the preferred embodiments of the present invention being described below in conjunction with accompanying drawing, above-mentioned and other objects, features and advantages of the present invention will be made clearly, wherein:
Fig. 1 is the flow chart of small-cell discovery signal generating method according to a first aspect of the present invention;
Fig. 2 is the schematic diagram designed according to the discovery signal structure of the embodiment of the present invention one;
Fig. 3 is the schematic diagram of the discovery signal transmission time Position Design according to the embodiment of the present invention one;
Fig. 4 is the schematic diagram of the configuration parameter of discovery signal according to the embodiment of the present invention one;
Fig. 5 is the schematic diagram designed according to the discovery signal structure of the embodiment of the present invention two;
Fig. 6 is the schematic diagram of the discovery signal transmission time Position Design according to the embodiment of the present invention two;
Fig. 7 is the schematic diagram of the configuration parameter of discovery signal according to the embodiment of the present invention two;
Fig. 8 is the schematic diagram of the discovery signal transmission time Position Design according to the embodiment of the present invention three;
Fig. 9 is the schematic diagram of the configuration parameter of discovery signal according to the embodiment of the present invention three;
Figure 10 designs according to the DS-SS for TDD/FDD pattern recognition of the embodiment of the present invention four;
Figure 11 is the flow chart of small-cell discovery symbol arranging method according to a second aspect of the present invention;
Figure 12 is the block diagram of the structure of the method small-cell base station performed according to a first aspect of the present invention;
Figure 13 is the block diagram of the structure of the equipment of the method performed according to a second aspect of the present invention; And
Figure 14 is the flow chart that the small-cell utilizing the present invention to propose according to a third aspect of the present invention finds the community discovery procedure of signal.
Embodiment
With reference to the accompanying drawings to a preferred embodiment of the present invention will be described in detail, eliminating in the course of the description is unnecessary details and function for the present invention, causes obscure to prevent the understanding of the present invention.
Set forth performing step of the present invention in detail in order to clear, provide some specific embodiments of the invention below, be applicable to the cellular communication system of LTE-Rel eaSe12.It should be noted that, the invention is not restricted to the application described in embodiment, but be applicable to other communication systems, the LTE system after such as LTE-ReleaSe12/13.Correspondingly, technical term title mentioned in this article also may change with the change of version.In addition, in the following description, based on different configurations, principle of the present invention and specific design example thereof have been described in detail.But, it will be appreciated by those skilled in the art that the example of the concrete configuration (e.g., the pattern of DS-SS position, DS-RS, launch time, content of parameter etc.) provided in following example is only illustrative and nonrestrictive.Such as, one of ordinary skill in the art are easy to the pattern that the DS-RS how applying the present invention to other is expected in instruction according to the present invention, launch time, content of parameter etc.
First, signal DS production method is found with reference to Fig. 1 small-cell described according to a first aspect of the present invention.As shown in the figure, the method originates in step S110, is produced be used for the synchronous synchronizing signal DS-SS of temporal frequency, as a part for described discovery signal by small-cell base station.Then, in step S120, the reference signal DS-RS being used for channel measurement is produced by small-cell base station, as another part of described discovery signal.The discovery signal of generation like this is made up of two parts, and one is for the synchronous synchronizing signal (referred to as DS-SS signal) of temporal frequency, and another is the reference signal (referred to as DS-RS signal) for providing basic channel measurement.
According to first embodiment of the invention, Fig. 2 illustrates the structural representation that finds signal.In this embodiment, see on the whole, DS signal comprises DS-RS signal and DS-SS signal, and DS-RS signal and DS-SS signal are transmitted simultaneously.Wherein DS-SS is made up of DS-SS-P signal and DS-SS-S signal again.In the middle of Fig. 2 and two subgraphs of the rightmost side, DS-SS signal only occupies a part for whole transmission bandwidth, and DS-RS signal distributions is in whole transmission bandwidth (with the signal of black bar shaped solid line in the subgraph in centre, with the signal of point-like striped in the subgraph of the rightmost side).DS-RS signal has certain pattern in temporal frequency, is not to occupy all running time-frequency resources.
Fig. 3 illustrates Position Design launch time that this finds signal.As shown in the figure, find that signal is transmitted periodically in time.DS-SS and DS-RS shares identical sub-frame offset (subframe), cycle parameter (with a frame for the cycle), emitting times (1) in the monocycle.
According to first embodiment of the invention, Fig. 4 illustrates the configuration parameter of corresponding discovery signal.Comprising the sub-carrier offset (frequency shift (FS) of DS-SS signal, unit is a subcarrier width, i.e. 15kHz), sub-frame offset (the time migration of the DS that DS-SS and DS-RS shares, unit is the duration of a subframe, i.e. 1ms), the transmitting cycle of the DS that DS-SS and DS-RS shares, (unit was the duration of a subframe, i.e. 1ms), also have the instruction of TDD/FDD structure.In this example, the pattern of the distribution of DS-RS, density, position are fixing.In the monocycle of the DS that DS-SS and DS-RS shares, emitting times is fixed as 1.
According to second embodiment of the present invention, Fig. 5 illustrates the structural representation that another finds signal.Wherein DS-SS signal has OFDMA symbol skew (time migration, unit is an OFDMA symbol duration, is about 66.7 μ s).The pattern of DS-RS signal in this figure and different in Fig. 2, and it has the possibility of configuration of density in temporal frequency, position.Also give the optional pattern of DS-RS signal in Figure 5 in a tabular form, often kind of pattern corresponds to different distribution densities and the position of RS signal.
Fig. 6 illustrates Position Design launch time that this finds signal.Wherein transmitting cycle of DS-SS and DS-RS, sub-frame offset are different.Optional transmitting cycle and sub-frame offset configuration can be listed in table.The sub-carrier offset of DS-SS signal can decide according to fixed function based on cell number.Such as, this function can be Δ f=45 [(N
iDmod31)-15] kHz, wherein Δ f represents the sub-carrier offset of DS-SS signal, N
iDrepresent cell number.
According to second embodiment of the present invention, Fig. 7 illustrates the configuration parameter of corresponding discovery signal.Divide other transmitting cycle and sub-frame offset comprising DS-SS and DS-RS, the pattern of the distribution of DS-RS, density, position, the OFDMA symbol skew of DS-SS signal, also has the instruction of TDD/FDD structure.Fig. 5 illustrates a part for the pattern of the distribution of DS-RS, density, position form.Fig. 6 illustrates a part for the form of the combination of transmitting cycle and sub-frame offset.In this example, in monocycle of DS of sharing of DS-SS and DS-RS, emitting times is fixed as 1.
According to the 3rd embodiment of the present invention, Fig. 8 illustrates Position Design launch time that another finds signal.Wherein in transmitting cycle of DS-SS and DS-RS, monocycle, emitting times, time migration are different.The frequency location of DS-SS signal can calculate with the configurable function that the time is relevant according to small-cell numbering use one.Such as, this configurable function can comprise three functions, is respectively Δ f
1=90 [(N
iDmod31)-15]+15 (tmod6) kHz, Δ f
2=180 [(N
iDmod31)-15]+15 (tmod12) kHz, Δ f
3=360 [(N
iDmod31)-15]+15 (tmod24) kHz, wherein Δ f represents the sub-carrier offset of DS-SS signal, N
iDrepresent cell number, t represents current subframe numbers.
According to the 3rd embodiment of the present invention, Fig. 9 illustrates the configuration parameter of corresponding discovery signal.Emitting times, sub-frame offset in other transmitting cycle, monocycle is divided comprising DS-SS and DS-RS.Fig. 8 also illustrates a part for the bitmap of the combination of emitting times, sub-frame offset in transmitting cycle, monocycle.In this example, the pattern of the distribution of DS-RS, density, position are fixing.The OFDMA symbol skew of DS-SS signal is also fixing.
According to the 4th embodiment of the present invention, Figure 10 illustrates a design for the relative position of the DS-SS-P signal and DS-SS-S signal of differentiating TDD/FDD pattern.In this design, the DS-SS-P signal under fdd mode and DS-SS-S signal are adjacent in time, and DS-SS-P signal in tdd mode and DS-SS-S signal are spaced in time.
Below, with reference to Figure 11, the small-cell described according to a second aspect of the present invention finds the flow chart of symbol arranging method.As shown in the figure, after determining the configuration parameter finding signal DS (S1100), described configuration parameter (S1100) is sent by the neighbor base stations of backstage chain road direction around it by small-cell base station or upper layer entity (such as, base station controller).
Described configuration parameter is used to indicate at least one item in the following configuration:
(1) frequency-splitting of the center frequency of described DS-SS and the center frequency of transmission bandwidth;
(2) described DS-RS distribute in temporal frequency pattern, density, position;
(3) emitting times and/or skew launch time in transmitting cycle of described DS-SS and/or DS-RS, monocycle; And
(4) transmission system is frequency division multiplexing (FDD) or time division multiplexing (TDD).
The form of expression being used to indicate in above-mentioned (1)-(3) configuration parameter of one or more item configuration can be following one:
The concrete configuration value of predefine unit,
Index sequence number in predetermined configuration form,
The time dependent function of time of predefined occurrence, or
Bitmap.
Wherein, the example of the concrete configuration value of predefine unit, predetermined configuration form, the time dependent function of time of predefined occurrence or bitmap provides according in the of the present invention first to the 3rd embodiment described above all, repeats no more herein.It should be noted that, although only a kind of form of expression may be illustrated for the configuration parameter being used to indicate in above-mentioned (1)-(3) one or more item configuration in above embodiment, benefit from those skilled in the art will recognize that of above-mentioned instruction and all the other any forms of expression can be used to the form of expression replacing embodiment to provide.
With method according to a first aspect of the present invention accordingly, the invention allows for relevant small-cell base station 1200.Figure 12 shows the schematic construction block diagram of this small-cell base station 1200.
As shown in the figure, this small-cell base station 1200 comprises discovery signal generation device 1210 and finds sender unit 1220.Described discovery signal generation device 1210 is configured to produce for the synchronous synchronizing signal DS-SS of temporal frequency, as a part for described discovery signal, and produces the reference signal DS-RS being used for channel measurement, as another part of described discovery signal.Described discovery sender unit 1220 is configured to launch the discovery signal produced.
With method according to a second aspect of the present invention accordingly, the invention allows for and relevant find the equipment 1300 of signal DS for configuration under the scene of small-cell, it can be small-cell base station or its upper layer entity.Figure 13 shows the schematic construction block diagram of this equipment 1300.
As shown in the figure, this equipment 1300 comprises configuration parameter determining device 1310 and configuration parameter dispensing device 1320.Described configuration parameter determining device 1310 is for determining the configuration parameter finding signal DS.Described configuration parameter dispensing device 1320 is for sending described configuration parameter by the neighbor base stations around the chain road direction small-cell base station of backstage.Described configuration parameter is used to indicate at least one item in the following configuration: the frequency-splitting of the center frequency of (1) described DS-SS and the center frequency of transmission bandwidth; (2) described DS-RS distribute in temporal frequency pattern, density, position; (3) emitting times and/or skew launch time in transmitting cycle of described DS-SS and/or DS-RS, monocycle; And (4) transmission system is frequency division multiplexing (FDD) or time division multiplexing (TDD).
Finally, Figure 14 small-cell utilizing the present invention to propose shown according to a third aspect of the present invention finds the community discovery procedure of signal.
As shown in the figure, the discovery procedure of described community comprises the following steps:
Step S1410: small-cell base station launches discovery signal according to discovery signal configures parameter.Find that the configuration parameter of signal is in small-cell base station initialization or when reconfiguring, determined by itself or upper layer entity.Such as, the sub-carrier offset of DS-SS signal is set to 96, i.e. 1440kHz, and it is not the multiple of 100kHz.The sub-frame offset of the DS that DS-SS and DS-RS shares is set to 1.The transmitting cycle of the DS that DS-SS and DS-RS shares is set to 10.TDD/FDD structure be designated as 1, that is, indicate FDD system.
Step S1420: after the discovery signal configures parameter of small-cell base station determines, these parameters are by the neighbor base stations be directly transferred to by backstage link around it.
Step S1430: when neighbor base stations to receive the discovery signal configures parameter of transmission by backstage, it finds by using the transmission of one of following two methods the user that signal configures parameter accesses to it:
(1). this base station is added these and is found the information of signal to it for broadcasting in the system information of frequently same or adjacent frequency base station.This base station periodic broadcasting sends the subscriber equipment that these system informations access to it.
(2). this base station is added these and is found that the information of signal is in the control signal of adding the subscriber equipment being transmitted to its access to.Find that the information of signal issues subscriber equipment in the process of emissioning controling signal.
Step S1440: the system information for broadcasting frequently same or adjacent frequency base station that subscriber equipment sends by receiving its access base station, or the control signal receiving subscriber equipment obtains the discovery signal configures parameter of neighbours' small-cell base station, thus according to the discovery signal configures parameter of the neighbours' small-cell base station received, (sub-frame offset of DS is 1, the transmitting cycle of DS is 10), monitoring discovery signal on the time point of correspondence, carries out community discovery.
It should be noted that in the above description, only in an illustrative manner, show technical scheme of the present invention, but be not intended that the invention be limited to above-mentioned steps and cellular construction.In a likely scenario, can as required step and cellular construction be adjusted and be accepted or rejected.Therefore, some step and unit not implement the necessary element of overall invention thought of the present invention.Therefore, technical characteristic essential to the invention is only limited to the minimum requirements that can realize overall invention thought of the present invention, and not by the restriction of above instantiation.
So far invention has been described in conjunction with the preferred embodiments.Should be appreciated that, those skilled in the art without departing from the spirit and scope of the present invention, can carry out various other change, replacement and interpolation.Especially, those skilled in the art can recombinate to the characteristic element provided respectively in above-mentioned four embodiments, to obtain preferred embodiment as required.Therefore, scope of the present invention is not limited to above-mentioned specific embodiment, and should be limited by claims.
Claims (25)
1., for a production method of the discovery signal DS of small-cell scene, comprising:
Produced by small-cell base station and be used for the synchronous synchronizing signal DS-SS of temporal frequency, as a part for described discovery signal; And
The reference signal DS-RS being used for channel measurement is produced, as another part of described discovery signal by small-cell base station.
2. method according to claim 1, wherein, described DS is launched with certain period distances by described small-cell base station.
3. method according to claim 1, wherein, described DS-SS only accounts for a part for whole transmission bandwidth, and is included in main DS-SS signal DS-SS-P and auxiliary DS-SS signal DS-SS-S that time domain is launched respectively.
4. method according to claim 3, wherein, described DS-SS-P uses Zadoff-Chu sequence sequential coding on frequency domain, and described DS-SS-S uses pseudorandom BPSK to encode on frequency domain.
5. method according to claim 1, wherein, described DS-SS carries the number information of small-cell.
6. method according to claim 1, wherein, the central point frequency of described DS-SS not should be the integral multiple of 100kHz, to avoid clashing with the temporal frequency synchronizing signal of routine.
7. method according to claim 1, wherein, described DS-RS on whole transmission bandwidth evenly or standard be uniformly distributed.
8. method according to claim 1, wherein, described DS-RS uses pseudorandom QPSK to encode on frequency domain.
9. method according to claim 1, wherein, described DS-SS and DS-RS has emitting times and/or skew identical or different launch time in identical or different transmitting cycle, identical or different monocycle.
10. the method according to claim 1,6,7 or 9, wherein, the frequency-splitting of the center frequency of described DS-SS and the center frequency of transmission bandwidth; The pattern that described DS-RS distributes in temporal frequency, density, position; And the transmitting cycle of described DS-SS or DS-RS, at least one item in the monocycle in emitting times, skew launch time are following one:
(1) fix; Or
(2) configured by small-cell base station or upper layer entity.
11. methods according to claim 10, wherein, the frequency-splitting of the center frequency of described DS-SS and the center frequency of transmission bandwidth; The pattern that described DS-RS distributes in temporal frequency, density, position; And the transmitting cycle of described DS-SS or DS-RS, at least one item in the monocycle in emitting times, skew launch time determine according to true or virtual small-cell numbering.
12. methods according to claim 10, wherein, the scope of described frequency-splitting is 0kHz-20MHz; The scope in described transmitting cycle is 10ms-1000ms; In the described monocycle, the scope of emitting times is 1-10; The scope of described skew launch time is 0.05ms-40ms.
13. methods according to claim 3, wherein, the Transmission Time Interval of described DS-SS-P and DS-SS-S and context are frequency division multiplexing (FDD) or time division multiplexing (TDD) for differentiating transmission system.
14. 1 kinds of small-cell base stations, comprising:
Find signal generation device, be configured to produce for the synchronous synchronizing signal DS-SS of temporal frequency, as a part for described discovery signal, and produce the reference signal DS-RS being used for channel measurement, as another part of described discovery signal; And
Find sender unit, be configured to launch the discovery signal produced.
15. 1 kinds of collocation methods for the discovery signal DS of small-cell scene, wherein, described discovery signal DS comprises for the synchronous synchronizing signal DS-SS of temporal frequency and the reference signal DS-RS for channel measurement, and described method comprises:
The configuration parameter finding signal DS is determined by small-cell base station or upper layer entity;
Described configuration parameter is sent by the neighbor base stations of backstage chain road direction around it, wherein by small-cell base station or upper layer entity
Described configuration parameter is used to indicate at least one item in the following configuration:
(1) frequency-splitting of the center frequency of described DS-SS and the center frequency of transmission bandwidth;
(2) described DS-RS distribute in temporal frequency pattern, density, position;
(3) emitting times and/or skew launch time in transmitting cycle of described DS-SS and/or DS-RS, monocycle; And
(4) transmission system is frequency division multiplexing (FDD) or time division multiplexing (TDD).
16. methods according to claim 15, wherein, be used to indicate (1)-(3) in one or more item configuration configuration parameter take the form of following one:
The concrete configuration value of predefine unit,
Index sequence number in predetermined configuration form,
The time dependent function of time of predefined occurrence, or
Bitmap.
17. methods according to claim 16, wherein, the concrete configuration value of described predefine unit, described predetermined configuration form or the described predefined function of time are relevant to the true or virtual numbering of small-cell base station.
18. methods according to claim 15, also comprise:
Described neighbor base stations launches the configuration parameter of the discovery signal DS received from small-cell base station or upper layer entity to its subscriber equipment, wherein, the configuration of the discovery signal DS of described subscriber equipment indicated by the configuration parameter received, performs community and find.
19. methods according to claim 18, wherein, described configuration parameter is added in the system information for broadcasting frequently same or adjacent frequency base station by described neighbor base stations.
20. methods according to claim 18, wherein, described configuration parameter is added into by described neighbor base stations and will be transmitted in the control signal of its subscriber equipment.
21. methods according to claim 18, wherein, described subscriber equipment is monitoring discovery signal on the time point that there is DS-SS or DS-RS transmitting according to the instruction of described configuration parameter only.
22. methods according to claim 15, wherein, described backstage link comprises: the backstage link between base station and base station, the backstage link between base station and its upper layer entity and/or the backstage link between upper layer entity and upper layer entity.
23. 1 kinds find the equipment of signal DS for configuration under the scene of small-cell, and wherein, described discovery signal DS comprises for the synchronous synchronizing signal DS-SS of temporal frequency and the reference signal DS-RS for channel measurement, and described equipment comprises:
Configuration parameter determining device, for determining the configuration parameter finding signal DS;
Configuration parameter dispensing device, for sending described configuration parameter by the neighbor base stations around the chain road direction small-cell base station of backstage, wherein
Described configuration parameter is used to indicate at least one item in the following configuration:
(1) frequency-splitting of the center frequency of described DS-SS and the center frequency of transmission bandwidth;
(2) described DS-RS distribute in temporal frequency pattern, density, position;
(3) emitting times and/or skew launch time in transmitting cycle of described DS-SS and/or DS-RS, monocycle; And
(4) transmission system is frequency division multiplexing (FDD) or time division multiplexing (TDD).
24. equipment according to claim 23, wherein, described equipment is small-cell base station or its upper layer entity.
Community discovery procedure under 25. 1 kinds of small-cell scenes, wherein, find that signal DS comprises for the synchronous synchronizing signal DS-SS of temporal frequency and the reference signal DS-RS for channel measurement, described discovery procedure comprises:
Small-cell base station sends described discovery signal;
Small-cell base station or its upper layer entity send the configuration parameter of described discovery signal by the neighbor base stations of backstage chain road direction small-cell base station;
Described neighbor base stations sends described configuration parameter to access user; And
The configuration of the discovery signal of described access user indicated by the configuration parameter received from described neighbor base stations, performs community and finds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102261.4A CN104936256A (en) | 2014-03-19 | 2014-03-19 | Small-cell base station discovery signal generation and configuration methods and related devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102261.4A CN104936256A (en) | 2014-03-19 | 2014-03-19 | Small-cell base station discovery signal generation and configuration methods and related devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104936256A true CN104936256A (en) | 2015-09-23 |
Family
ID=54123150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410102261.4A Pending CN104936256A (en) | 2014-03-19 | 2014-03-19 | Small-cell base station discovery signal generation and configuration methods and related devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104936256A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019037506A1 (en) * | 2017-08-24 | 2019-02-28 | 电信科学技术研究院有限公司 | Measurement gap determination method, user terminal and network side device |
| CN109714141A (en) * | 2017-08-11 | 2019-05-03 | 华为技术有限公司 | A kind of indicating means and equipment of Physical Resource Block PRB grid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014008665A1 (en) * | 2012-07-13 | 2014-01-16 | Renesas Mobile Corporation | Small cell discovery and measurement in wireless mobile networks |
-
2014
- 2014-03-19 CN CN201410102261.4A patent/CN104936256A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014008665A1 (en) * | 2012-07-13 | 2014-01-16 | Renesas Mobile Corporation | Small cell discovery and measurement in wireless mobile networks |
Non-Patent Citations (2)
| Title |
|---|
| ERICSSON: "3GPP TSG RAN WG1 #76 R1-140759 On the design of discovery bursts and procedures", 《3GPP》 * |
| SAMSUNG: "3GPP TSG-RAN WG1 #74 R1-133828 Discussion on small cell discovery", 《3GPP》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109714141A (en) * | 2017-08-11 | 2019-05-03 | 华为技术有限公司 | A kind of indicating means and equipment of Physical Resource Block PRB grid |
| US10911208B2 (en) | 2017-08-11 | 2021-02-02 | Huawei Technologies Co., Ltd. | Physical resource block PRB grid indication method and device |
| US11539497B2 (en) | 2017-08-11 | 2022-12-27 | Huawei Technologies Co., Ltd. | Physical resource block PRB grid indication method and device |
| US11924143B2 (en) | 2017-08-11 | 2024-03-05 | Huawei Technologies Co., Ltd. | Physical resource block PRB grid indication method and device |
| WO2019037506A1 (en) * | 2017-08-24 | 2019-02-28 | 电信科学技术研究院有限公司 | Measurement gap determination method, user terminal and network side device |
| US11438127B2 (en) | 2017-08-24 | 2022-09-06 | Datang Mobile Communications Equipment Co., Ltd. | Measurement gap determination method, user equipment, and network side device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109451581B (en) | A kind of paging method and device | |
| CN106572533B (en) | Paging processing method and device | |
| CN101714897B (en) | Method for configuring sounding reference signals | |
| CN104704898B (en) | Method, user equipment and the base station of communication | |
| KR20210003839A (en) | Method, apparatus and system for implementing sidelink resource configuration | |
| CN108370576A (en) | Method and system for executing network slice in wireless access network | |
| US9769705B2 (en) | Method and apparatus for implementing decentralized clustering mechanism | |
| CN105409301B (en) | LTE synchronous method and relevant device and system | |
| CN109451585A (en) | A kind of communication means and device | |
| MY179770A (en) | Small data communications in a wireless communication network | |
| CN105684540A (en) | Systems and methods for improved communication efficiency in high efficiency wireless networks | |
| WO2015058005A3 (en) | METHOD AND SYSTEM FOR MILLIMETER WAVE HOTSPOT (mmH) BACKHAUL AND PHYSICAL (PHY) LAYER TRANSMISSIONS | |
| CN102843180B (en) | Method of data transmission in channel | |
| JP2015525043A5 (en) | ||
| US10271266B2 (en) | Telecommunications apparatus and methods | |
| CN104854949A (en) | System and method for random access in heterogeneous communications systems | |
| CN102611524A (en) | Method, system and equipment for information transmission | |
| CN103095631A (en) | Transmission method, allocation method and device of downlink reference signal | |
| CN102547968B (en) | Coordinated multiple-point transmission downlink synchronization method and device | |
| CN102377722A (en) | Apparatus and method for co-existence between different radio access technologies | |
| CN104521267A (en) | Communication control device, and communication control method | |
| CN103947239A (en) | Wireless base station and wireless communication method | |
| WO2015032271A1 (en) | Signalling transmission method, system and network side of reference operations for multiple carriers | |
| CN106332226A (en) | Cell searching method and device for MMC (Millimeter Wave Communication) network | |
| JP2022191387A (en) | Paging occasion start determination |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150923 |