CN106612540A

CN106612540A - A method, user equipment and base station for realizing downlink synchronization

Info

Publication number: CN106612540A
Application number: CN201510698107.2A
Authority: CN
Inventors: 黄磊; 王艺
Original assignee: Huawei Technologies Co Ltd
Current assignee: XFusion Digital Technologies Co Ltd
Priority date: 2015-10-23
Filing date: 2015-10-23
Publication date: 2017-05-03
Anticipated expiration: 2035-10-23
Also published as: WO2017067436A1; CN106612540B

Abstract

The embodiment of the invention provides a method for downlink synchronization, user equipment and a high frequency base station in a high and low frequency hybrid networking system. The method comprises the following steps: the user equipment receives synchronization information sent by the high frequency base station, wherein a synchronization radio frame used for the synchronization information comprises at least one special subframe comprising a DLBP including Nu subintervals, each of which transmits Nd synchronization signals, wherein Nu and Nd are positive integers greater than 1; and the user equipment carries out synchronization according to the synchronization information. In the embodiment of the invention, the high frequency base station transmits the synchronization information in the special subframe, and the UE completes the synchronization with the high frequency base station by receiving the synchronization signal in the special subframe, thereby facilitating the UE to quickly access the high frequency system and saving the power consumption in access.

Description

The method of down-going synchronous, user equipment and base station

Technical field

The present embodiments relate to the communications field, and more particularly, to a kind of low-and high-frequency mixed networking The method of down-going synchronous, user equipment and base station in system.

Background technology

With the continuous lifting of the requirements such as message transmission rate now for mobile communication, communication quality, The existing frequency range for mobile communication has become very crowded.However, in the millimeter of 6-300GHz In wave frequency section, still possess that substantial amounts of frequency spectrum resource is also unassigned to be used.Millimeter wave frequency band is incorporated into Honeycomb access communications, make full use of the big bandwidth resources of millimeter wave frequency band, are 5G movements of future generation One of important research direction of communication system.

In existing research, the high band with millimeter wave frequency band as representative is mainly used in indoor short distance and leads to Letter scene.In outdoor scene, due to a varied topography, cause that high band path loss is larger, penetrate barrier Ability is weaker, and has serious rain to decline effect in some frequencies, seriously constrains high band in outdoor The application of scene.However, high band is short due to its wavelength, large scale array antenna, Ke Yitong are easily realized Cross beam shaping (beam-forming) technology and bring big beam antenna gain, so as to effectively compensate Its high path loss, this also provides probability for high band in the application that the middle and long distance of outdoor scene is transmitted.

From the point of view of current present Research, frequency range is more high, and the scope that it can be covered is then relatively less, base Available array antenna scale of standing is then bigger.For example, for E-band systems, it is generally possible to cover 25 meters to 100 meters of radius of society, the scale of base station array antenna is up to 1024 antenna array units. For the system of below 30GHz frequency ranges, it is generally possible to cover 50 meters to 200 meters of radius of society, base Stand array antenna scale up to 256 antenna array units.Large scale array day is adopted in radio frequency system Line forms the directional beam with high-gain, can overcome the high path loss that high band brings, and improves link and covers Lid.However, directional beam sets to broadcast channel, control channel, synchronizing channel, RACH Meter proposes challenge with transmission.

In existing mobile communication system, such as UMTS (Universal Mobile Telecommunications System, UMTS), Long Term Evolution (Long Term Evolution, LTE) System, the transmission of above-mentioned channel is realized by the transmitting-receiving of omnidirectional antenna.For descending broadcast is believed For road, down control channel, synchronizing channel, base station sends once above-mentioned channel letter by omnidirectional antenna Breath, all user equipmenies under its covering can be successfully received.For ascending control channel, at random connect For entering channel, user equipment sends once above-mentioned channel information, and own base station can then pass through omnidirectional antenna It is successfully received.But in high frequency communication system, due to the restriction of the beam angle of directional beam, lead to The fraction region that the signal of a directional beam transmission can only be covered on certain specific direction is crossed, and at this Corresponding information cannot be then properly received outside region.Therefore, such as to obtain in existing mobile communication system The effect that covers of omnidirectional, then need to travel through transmitting terminal and the combination of receiving terminal all of directional beam.If Sending and receiving end adopts directional beam, then the quantity of above-mentioned beam combination is very huge, will cause radio frequency system Expense is sharply increased.

In high frequency communication system, base station can be carried out with user equipment using large-scale aerial array Beam shaping, by adjust the phase place of each antenna element, amplitude and/or multiple radio frequencies (Radio Frequency, RF) the numerical weighted vector on passage can form the directional beam (broad beam, narrow beam) of different in width. The beam angle of generally broad beam is more than 2 times of narrow beam beam angle.

In addition, in high frequency communication system, the high path loss that high band brings needs the height by aerial array Beam gain is compensating.The acquisition of high beam gain is built upon transmitting-receiving two-end wave beam alignment (beam Alignment on basis).Once transmitting-receiving two-end wave beam mismatch (mis-aligned), receives signal Quality then can drastically decline, and normal data communication can be interrupted.Therefore, in high frequency communication system, In order to ensure normal data communication, need regular or irregular carry out wave beam training (beam Training) and wave beam tracking (beam tracking) so that transmitting-receiving two-end can adopt optimal transmitting-receiving ripple Beam is to carrying out the transmission of data.

In the prior art, the equal reserved part resource of each wireless sub-frame is used for the transmission of downlink synchronous signal, It is a kind of distributed sending method.User equipment needs the synchronization letter by receiving to multiple wireless sub-frames Number it is combined and compares the down-going synchronous that could realize system.Time required for this synchronous method compared with It is long, cause expense larger, and further have impact on the performance of system.

The content of the invention

The method that the present invention provides down-going synchronous in a kind of low-and high-frequency mixed networking, can save expense, from And the performance of lift system.

A kind of first aspect, there is provided method of down-going synchronous, is applied to low-and high-frequency mixed networking system, Including：

User equipment receives the synchronizing information that high frequency base station sends, and the synchronizing information is held by synchronous radio frame Carry, the synchronous radio frame includes at least one special subframe, the special subframe is used to transmit synchronous letter Number, wherein, the special subframe includes down-going synchronous and wave beam training interval DLBP, the DLBP Including Nu subinterval, Nd synchronizing signal is transmitted in described each subinterval, and wherein Nu and Nd is Positive integer more than 1；

The user equipment is synchronized according to the synchronizing information.

Alternatively, the synchronous radio frame still further comprises at least one general subframe, the general son Frame is used for transmission data.

So, by general sub-frame transmission data in synchronous radio frame, by special subframe synchronous signal transmission, Further, user equipment can carry out down-going synchronous according to the close frame structure, and synchronization overhead is little, The synchronous efficiency of low-and high-frequency group network system, lift system performance can further be improved.

With reference in a first aspect, in the first possible implementation of first aspect, described each sub-district Between include Nd timeslice, the length of each timeslice includes at least two OFDM symbols.

With reference to the first possible implementation of first aspect, in second possible reality of first aspect In existing mode, the first OFDM symbol at least two OFDM symbol is used to send main synchronization Signal, the second OFDM symbol at least two OFDM symbol is used to send auxiliary synchronous signals.

With reference to second possible implementation of first aspect, in the third possible reality of first aspect In existing mode, second OFDM symbol is used to send the particular sequence of the auxiliary synchronous signals.Wherein, The particular sequence includes mark ID of timeslice that the particular sequence is located and described specific The ID in the subinterval that sequence is located.

Alternatively, the ID of the timeslice that particular sequence is located could alternatively be the ID for sending wave beam.It is optional Ground, particular sequence can also include the ID of the high frequency base station.So, specific subinterval it is specific when Between particular sequence is transmitted on piece, user equipment can carry out relevant detection to auxiliary synchronous signals, obtain specific The ID in the subinterval that the ID and particular sequence of the timeslice that sequence is located is located, and therefore can know The position of OFDM symbol in the special subframe that auxiliary synchronous signals are located such that it is able to obtain radio frame synchronization.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 4th kind of possible implementation, described each subinterval also includes being located at the Nd time respectively Nd switching guard interval SGP after piece.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 5th kind of possible implementation, the Nd synchronizing signal is that the high frequency base station uses Nd not Same sends what wave beam was transmitted successively.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 6th kind of possible implementation, the user equipment receives the synchronizing information that high frequency base station sends, bag Include：The user equipment is received respectively on the Nu subinterval using the Nu different wave beam that receives Synchronizing signal.That is, user equipment uses a Nd received on one subinterval of wave beam reception Individual synchronizing signal.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 7th kind of possible implementation, on the first special subframe in the synchronizing information, the high frequency Base station sends the synchronizing signal using the transmission wave beam of the first order；In the synchronizing information second On special subframe, the high frequency base station sends the synchronizing signal using the transmission wave beam of the second order, its In, second order is to sequentially pass through cyclic shift by described first to generate.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 8th kind of possible implementation, each synchronous radio frame includes a special subframe；Described first is special Different subframe is the special subframe in the first synchronous radio frame, and second special subframe is the second synchronous radio Special subframe in frame；Wherein, the second synchronous radio frame is adjacent with the first synchronous radio frame Next synchronous radio frame.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 9th kind of possible implementation, each synchronous radio frame includes 2N special subframe；Described first Special subframe is the 2i special subframe in the 2N special subframe, and second special subframe is The 2i+1 special subframe in the 2N special subframe；Wherein, N is positive integer, i be less than or Positive integer equal to N.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In tenth kind of possible implementation, the user equipment receives the synchronizing information that high frequency base station sends, bag Include：The low frequency signal that low frequency base station of the user equipment in the system sends determines synchronous detecting The original position of window；The user equipment is using Nu different reception wave beam from the original position Start to receive Nu group synchronizing signals respectively, wherein, every group of synchronizing signal includes Nd synchronizing signal.

Alternatively, user equipment also receives the low frequency signal of low frequency base station transmission.Specifically, user equipment The frame structure used according to low frequency base station transmission low frequency signal determines the original position of sync detection window. So, user equipment aids in determining synchronous starting point by low frequency so that high-frequency synchronous are more effective.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In a kind of tenth possible implementation, second order is to sequentially pass through cyclic shift by described first Generate.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 12nd kind of possible implementation, the length of the timeslice of the cyclic shift is more than the system Low-and high-frequency time delay.

Due to there is low-and high-frequency time delay in system, user equipment is caused to there is synchronous blind area in synchronization.This In, by the cyclic shift more than low-and high-frequency time delay, ensure that user equipment is received originally in same The synchronizing signal of step blind area such that it is able to so that user equipment quickly obtains the down-going synchronous of high frequency.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 13rd kind of possible implementation, the special subframe also includes being located at following after the DLBP Ring suffix CS, the CS transmits K synchronizing signal, wherein, K is the positive integer less than Nd.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 14th kind of possible implementation, the Nd synchronizing signal is that the high frequency base station uses Nd Send what wave beam was transmitted successively；The K synchronizing signal is that the high frequency base station uses the Nd First K in individual transmission wave beam sends what wave beam was transmitted successively.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 15th kind of possible implementation, the user equipment receives the synchronizing information that high frequency base station sends, Including：The low frequency signal that low frequency base station of the user equipment in the system sends determines that first is same The first start bit of step detection window is put；The user equipment is using Nu different reception wave beam from institute State first start bit and put and start to receive Nu group synchronizing signals respectively, wherein, every group of synchronizing signal includes Nd Individual synchronizing signal；Low frequency signal that low frequency base station of the user equipment in the system sends and attached The adjunction time receiving prolongs the second original position for determining the second sync detection window；The user equipment uses Nu Individual different reception wave beam starts to receive Nu group synchronizing signals respectively from second original position, wherein, Every group of synchronizing signal includes Nd synchronizing signal.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 16th kind of possible implementation, second special subframe be positioned at first special subframe it First special subframe afterwards.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 17th kind of possible implementation, the additional receptive time delay is preset in the user equipment. It is alternatively possible to the additional receptive time delay is pre-configured to be in into user according to the low-and high-frequency time delay of the system In equipment.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 18th kind of possible implementation, the additional receptive time delay is the user equipment from the low frequency What base station obtained.Alternatively, low frequency base station can determine described attached according to the low-and high-frequency time delay of the system The adjunction time receiving prolongs, and the additional receptive time delay by determined by is sent to user equipment.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 19th kind of possible implementation, the additional receptive time delay is the user equipment by described low What the RRC signaling that frequency base station sends was obtained.That is, the RRC that low frequency base station sends to user equipment Signaling includes additional receptive time delay.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 20th kind of possible implementation, the length of the additional receptive time delay is more than the height of the system Frequency time delay, the length of the timeslice shared by the CP more than or equal to the low-and high-frequency time delay with it is described Additional receptive time delay sum.

Due to there is low-and high-frequency time delay in system, user equipment is caused to there is synchronous blind area in synchronization.This In, by arrange more than low-and high-frequency time delay additional receptive time delay, and arrange more than low-and high-frequency time delay with it is attached The adjunction time receiving prolongs the CP of sum, ensure that user equipment is received originally in the synchronous letter of synchronous blind area Number such that it is able to so that user equipment quickly obtains the down-going synchronous of high frequency.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In a kind of 20th possible implementation, in the user equipment the synchronous letter that high frequency base station sends is received Before breath, also include：The RRC signaling that low frequency base station sends is received, wherein the RRC signaling includes： The frequency that the high frequency base station is adopted, and/or, the value of Nd.

Due to the value of Nd it is relevant with the frequency that high frequency base station is adopted.So, if RRC signaling includes The value of Nd, then user equipment can directly know the value of Nd.If RRC signaling includes high frequency base station The frequency for being adopted, then user equipment can determine the value of Nd according to the frequency.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 22nd kind of possible implementation, the special subframe also include reserved data interval RDP and Up-downgoing switching guard interval GP.

Alternatively, RDP can be used for carrying out transmitting uplink data or uplink random access etc..

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 23rd kind of possible implementation, the synchronous radio frame also includes general subframe, described general Subframe includes the time slot that 8 length is 0.125 millisecond, and the time slot includes Ns OFDM symbol, Wherein, Ns is positive integer.

With reference to first aspect or the arbitrary possible implementation of above-mentioned first aspect, in first aspect In 24th kind of possible implementation, the week of the synchronous radio frame that the high frequency base station is used Phase is the length of M radio frames, wherein, M is positive integer.

A kind of second aspect, there is provided method of down-going synchronous, is applied to low-and high-frequency mixed networking system, Including：

High frequency base station generates synchronizing information, and the synchronizing information is carried by synchronous radio frame, the synchronous nothing Line frame includes at least one special subframe, and the special subframe is used for synchronous signal transmission, wherein, it is described Special subframe includes that down-going synchronous and wave beam training interval DLBP, the DLBP include Nu subinterval, Nd synchronizing signal is transmitted in described each subinterval, and wherein Nu and Nd is the positive integer more than 1；

The high frequency base station sends the synchronizing information to user equipment.

So, by general sub-frame transmission data in synchronous radio frame, by special subframe synchronous signal transmission, The synchronizing information that high frequency base station sends has close frame structure.Further, user equipment can basis The close frame structure carries out down-going synchronous, and synchronization overhead is little, and then can improve low-and high-frequency group network system Synchronous efficiency, lift system performance.

With reference to second aspect, in the first possible implementation of second aspect, described each sub-district Between include Nd timeslice, the length of each timeslice includes at least two OFDMs OFDM symbol.

With reference to the first possible implementation of second aspect, in second possible reality of second aspect In existing mode, the first OFDM symbol at least two OFDM symbol is used to send main synchronization Signal, the second OFDM symbol at least two OFDM symbol is used to send auxiliary synchronous signals.

With reference to second aspect or the arbitrary possible implementation of above-mentioned second aspect, in second aspect In the third possible implementation, second OFDM symbol is used to send the auxiliary synchronous signals Particular sequence.Wherein, the particular sequence include the particular sequence be located timeslice ID and The ID in the subinterval that the particular sequence is located.

With reference to second aspect or the arbitrary possible implementation of above-mentioned second aspect, in second aspect In 4th kind of possible implementation, described each subinterval also includes being located at the Nd time respectively Nd switching guard interval SGP after piece.

With reference to second aspect or the arbitrary possible implementation of above-mentioned second aspect, in second aspect In 5th kind of possible implementation, the synchronizing information is sent to the user and is set by the high frequency base station It is standby, including：The high frequency base station sends the Nd synchronizing signal using Nd different transmission wave beam.

With reference to second aspect or the arbitrary possible implementation of above-mentioned second aspect, in second aspect In 6th kind of possible implementation, the synchronizing information is sent to the user and is set by the high frequency base station It is standby, including：

On the first special subframe in the synchronizing information, the high frequency base station sending out using the first order Wave beam is sent to send the synchronizing signal；

On the second special subframe in the synchronizing information, the high frequency base station sending out using the second order Wave beam is sent to send the synchronizing signal.

With reference to second aspect or the arbitrary possible implementation of above-mentioned second aspect, in second aspect In 7th kind of possible implementation, each synchronous radio frame includes a special subframe；

First special subframe is the special subframe in the first synchronous radio frame, second special subframe For the special subframe in the second synchronous radio frame；

Wherein, the second synchronous radio frame is that the next one adjacent with the first synchronous radio frame is synchronous Radio frames.

With reference to second aspect or the arbitrary possible implementation of above-mentioned second aspect, in second aspect In 8th kind of possible implementation, each synchronous radio frame includes 2N special subframe；

First special subframe is the 2i special subframe in the 2N special subframe, described Two special subframes are the 2i+1 special subframe in the 2N special subframe；

Wherein, N is positive integer, and i is the positive integer less than or equal to N.

With reference to second aspect or the arbitrary possible implementation of above-mentioned second aspect, in second aspect In 9th kind of possible implementation, second order is to sequentially pass through cyclic shift life by described first Into.

With reference to second aspect or the arbitrary possible implementation of above-mentioned second aspect, in second aspect In tenth kind of possible implementation, the length of the timeslice of the cyclic shift is more than the height of the system Low frequency time delay.

With reference to second aspect or the arbitrary possible implementation of above-mentioned second aspect, in second aspect In a kind of tenth possible implementation, the special subframe also includes being located at following after the DLBP Ring suffix CS, the CS transmits K synchronizing signal, wherein, K is the positive integer less than Nd.

With reference to second aspect or the arbitrary possible implementation of above-mentioned second aspect, in second aspect In 12nd kind of possible implementation, the high frequency base station sends the synchronizing information to the user Equipment, including：

The high frequency base station sends wave beam and sends the Nd synchronizing signal successively using Nd；

The high frequency base station sends wave beam and sends institute successively using described Nd first K sent in wave beam State K synchronizing signal.

With reference to second aspect or the arbitrary possible implementation of above-mentioned second aspect, in second aspect In 13rd kind of possible implementation, the special subframe also include reserved data interval RDP and on Descending switching guard interval GP.

With reference to second aspect or the arbitrary possible implementation of above-mentioned second aspect, in second aspect In 14th kind of possible implementation, the cycle of the synchronous radio frame that the high frequency base station is used For the length of M radio frames, wherein, M is positive integer.

A kind of third aspect, there is provided user equipment, in low-and high-frequency mixed networking system, including：

Receiving unit, for receiving the synchronizing information of high frequency base station transmission, the synchronizing information is by synchronous nothing Line frame is carried, and the synchronous radio frame includes at least one special subframe, and the special subframe is used to transmit Synchronizing signal, wherein, the special subframe includes that DLBP, the DLBP include Nu subinterval, Nd synchronizing signal is transmitted in described each subinterval, and wherein Nu and Nd is the positive integer more than 1；

Processing unit, for being synchronized according to the synchronizing information.

With reference to the third aspect, in the first possible implementation of the third aspect, described each sub-district Between include Nd timeslice, the length of each timeslice includes at least two OFDMs OFDM symbol.

With reference to the first possible implementation of the third aspect, in second possible reality of the third aspect In existing mode, the first OFDM symbol at least two OFDM symbol is used to send main synchronization Signal, the second OFDM symbol at least two OFDM symbol is used to send auxiliary synchronous signals.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The third possible implementation in, second OFDM symbol be used for send the auxiliary synchronous signals Particular sequence, wherein, the particular sequence include the particular sequence be located timeslice ID, with And the ID in the subinterval at the particular sequence place.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 4th kind of possible implementation in, described each subinterval also include respectively be located at described Nd when Between Nd switching guard interval SGP after piece.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 5th kind of possible implementation in, the Nd synchronizing signal is that the high frequency base station uses Nd Different sends what wave beam was transmitted.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 6th kind of possible implementation in, the receiving unit, specifically for：It is different using Nu Receive the synchronizing signal that wave beam receives respectively the Nu subinterval.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 7th kind of possible implementation in, on the first special subframe in the synchronizing information, the height Frequency base station sends the synchronizing signal using the transmission wave beam of the first order；In the synchronizing information On two special subframes, the high frequency base station sends the synchronizing signal using the transmission wave beam of the second order.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 8th kind of possible implementation in, each synchronous radio frame include a special subframe；

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 9th kind of possible implementation in, each synchronous radio frame include 2N special subframe；

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The tenth kind of possible implementation in, the receiving unit, specifically for：

The low frequency signal that low frequency base station in the system sends determines the start bit of sync detection window Put；

Start to receive Nu groups synchronously letter respectively from the original position using Nu different reception wave beam Number, wherein, every group of synchronizing signal includes Nd synchronizing signal.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect A kind of the tenth possible implementation in, second order be by described first sequentially pass through circulation move What position generated.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 12nd kind of possible implementation in, the length of the timeslice of the cyclic shift is more than the system Low-and high-frequency time delay.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 13rd kind of possible implementation in, the special subframe also include be located at the DLBP after Cyclic suffix CS, the CS transmits K synchronizing signal, wherein, K is the positive integer less than Nd.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 14th kind of possible implementation in, the Nd synchronizing signal is that the high frequency base station uses Nd It is individual to send what wave beam was transmitted successively；

The K synchronizing signal is that the high frequency base station uses described Nd the front K sent in wave beam Send what wave beam was transmitted successively.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 15th kind of possible implementation in, the receiving unit, specifically for：

The low frequency signal that low frequency base station in the system sends determines the of the first sync detection window One original position；

Put from the first start bit using Nu different reception wave beam and start to receive respectively Nu groups synchronously Signal, wherein, every group of synchronizing signal includes Nd synchronizing signal；

The low frequency signal and additional receptive time delay that low frequency base station in the system sends determines that second is same Second original position of step detection window；

Start to receive respectively Nu groups synchronously from second original position using Nu different reception wave beam Signal, wherein, every group of synchronizing signal includes Nd synchronizing signal.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 16th kind of possible implementation in, second special subframe is positioned at first special subframe First special subframe afterwards.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 17th kind of possible implementation in, the additional receptive time delay is preset in the user equipment.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 18th kind of possible implementation in, the receiving unit, be additionally operable to from the low frequency base station obtain The additional receptive time delay.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 19th kind of possible implementation in, the receiving unit, specifically for by the low frequency base station The radio resource control RRC signaling of transmission obtains the additional receptive time delay.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 20th kind of possible implementation in, the height of the length of the additional receptive time delay more than the system Low frequency time delay, the length of the timeslice shared by the CP is more than or equal to the low-and high-frequency time delay and institute State additional receptive time delay sum.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect A kind of the 20th possible implementation in, the receiving unit is additionally operable to：

The radio resource control RRC signaling that low frequency base station sends is received, wherein the RRC signaling includes：

The frequency that the high frequency base station is adopted, and/or, the value of Nd.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 22nd kind of possible implementation in, the special subframe also include reserved data interval RDP with And up-downgoing switching guard interval GP.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 23rd kind of possible implementation in, the synchronous radio frame also include general subframe, described one As subframe include time slot that 8 length is 0.125 millisecond, the time slot includes Ns OFDM symbol, Wherein, Ns is positive integer.

With reference to any one possible implementation of the third aspect or the above-mentioned third aspect, in the third aspect The 24th kind of possible implementation in, the synchronous radio frame that the high frequency base station is used Cycle is the length of M radio frames, wherein, M is positive integer.

A kind of fourth aspect, there is provided high frequency base station, including：

Signal generating unit, for generating synchronizing information, the synchronizing information is carried by synchronous radio frame, described Synchronous radio frame includes at least one special subframe, and the special subframe is used for synchronous signal transmission, wherein, The special subframe includes that DLBP, the DLBP include Nu subinterval, and described each subinterval passes Defeated Nd synchronizing signal, wherein Nu and Nd is the positive integer more than 1；

Transmitting element, for the synchronizing information to be sent to user equipment.

With reference to fourth aspect, in the first possible implementation of fourth aspect, described each sub-district Between include Nd timeslice, the length of each timeslice includes at least two OFDMs OFDM symbol.

With reference to the first possible implementation of fourth aspect, in second possible reality of fourth aspect In existing mode, the first OFDM symbol at least two OFDM symbol is used to send main synchronization Signal, the second OFDM symbol at least two OFDM symbol is used to send auxiliary synchronous signals.

With reference to second possible implementation of fourth aspect, in the third possible reality of fourth aspect In existing mode, second OFDM symbol is used to send the particular sequence of the auxiliary synchronous signals, wherein, The particular sequence includes that the ID and the particular sequence of the timeslice that the particular sequence is located is located Subinterval ID.

With reference to any one possible implementation of fourth aspect or above-mentioned fourth aspect, in fourth aspect The 4th kind of possible implementation in, described each subinterval also include respectively be located at described Nd when Between Nd switching guard interval SGP after piece.

With reference to any one possible implementation of fourth aspect or above-mentioned fourth aspect, in fourth aspect The 5th kind of possible implementation in, the transmitting element, specifically for：It is different using Nd Send wave beam and send the Nd synchronizing signal.

With reference to any one possible implementation of fourth aspect or above-mentioned fourth aspect, in fourth aspect The 6th kind of possible implementation in, the transmitting element, specifically for：

On the first special subframe in the synchronizing information, using the transmission wave beam of the first order institute is sent State synchronizing signal；

On the second special subframe in the synchronizing information, using the transmission wave beam of the second order institute is sent State synchronizing signal.

With reference to any one possible implementation of fourth aspect or above-mentioned fourth aspect, in fourth aspect The 7th kind of possible implementation in, each synchronous radio frame include a special subframe；

With reference to any one possible implementation of fourth aspect or above-mentioned fourth aspect, in fourth aspect The 8th kind of possible implementation in, each synchronous radio frame include 2N special subframe；

With reference to any one possible implementation of fourth aspect or above-mentioned fourth aspect, in fourth aspect The 9th kind of possible implementation in, second order is to sequentially pass through cyclic shift by described first Generate.

With reference to any one possible implementation of fourth aspect or above-mentioned fourth aspect, in fourth aspect The tenth kind of possible implementation in, the length of the timeslice of the cyclic shift is more than the system Low-and high-frequency time delay.

With reference to any one possible implementation of fourth aspect or above-mentioned fourth aspect, in fourth aspect A kind of the tenth possible implementation in, the special subframe also include be located at the DLBP after Cyclic suffix CS, the CS transmits K synchronizing signal, wherein, K is the positive integer less than Nd.

With reference to any one possible implementation of fourth aspect or above-mentioned fourth aspect, in fourth aspect The 12nd kind of possible implementation in, the transmitting element, specifically for：Using Nd transmission Wave beam sends successively the Nd synchronizing signal；The front K transmission sent in wave beam using described Nd Wave beam sends successively the K synchronizing signal.

With reference to any one possible implementation of fourth aspect or above-mentioned fourth aspect, in fourth aspect The 13rd kind of possible implementation in, the special subframe also include reserved data interval RDP and Up-downgoing switching guard interval GP.

With reference to any one possible implementation of fourth aspect or above-mentioned fourth aspect, in fourth aspect The 14th kind of possible implementation in, the week of the synchronous radio frame that the high frequency base station is used Phase is the length of M radio frames, wherein, M is positive integer.

5th aspect, there is provided a kind of user equipment, including processor, transceiver and memorizer.Transmitting-receiving Device is used to receive the synchronizing information that the high frequency base station sends, and carries the synchronous radio frame of the synchronizing information Including at least one special subframe, the special subframe is used for synchronous signal transmission, wherein, it is described special Subframe includes that DLBP, the DLBP include Nu subinterval, described each subinterval transmission Nd Synchronizing signal, wherein Nu and Nd are the positive integer more than 1.Processor is used for according to the synchronizing information Synchronize.

Alternatively, the transceiver in the 5th aspect can be realized by receptor.

6th aspect, there is provided a kind of high frequency base station, including processor, transceiver and memorizer.Process Device is used to generate synchronizing information, carries the synchronous radio frame of the synchronizing information and includes at least one special son Frame, the special subframe includes that DLBP, the DLBP include Nu subinterval, described each sub-district Between transmit Nd synchronizing signal, wherein Nu and Nd is the positive integer more than 1.Transceiver is used for institute State synchronizing information to send to the user equipment.

Alternatively, the transceiver in the 6th aspect can be realized by transmitter.

7th aspect, there is provided a kind of computer program, the computer program includes：Meter Calculation machine program code, when the computer program code by the receiving unit of user equipment, processing unit or When transceiver, processor run so that the user equipment performs above-mentioned in a first aspect, and its various realities The method of any one down-going synchronous in existing mode.

Eighth aspect, there is provided a kind of computer program, the computer program includes：Meter Calculation machine program code, when the computer program code by the signal generating unit of high frequency base station, transmitting element or When transceiver, processor run so that the high frequency base station performs above-mentioned second aspect, and its various realities The method of any one down-going synchronous in existing mode.

9th aspect, there is provided a kind of computer-readable recording medium, the computer-readable recording medium Have program stored therein, it is above-mentioned in a first aspect, and its various implementations that described program causes user equipment to perform In any one down-going synchronous method.

Tenth aspect, there is provided a kind of computer-readable recording medium, the computer-readable recording medium Have program stored therein, described program causes high frequency base station to perform above-mentioned second aspect, and its various implementations In any one down-going synchronous method.

In the present invention, high frequency base station sends synchronizing information in special subframe, and UE is by receiving special son Synchronizing signal in frame, completes synchronous with high frequency base station, is so conducive to UE to quickly access high frequency system System, saves power consumption when accessing.

Description of the drawings

In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be to embodiment or existing skill The accompanying drawing to be used needed for art description is briefly described, it should be apparent that, drawings in the following description Only some embodiments of the present invention, for those of ordinary skill in the art, are not paying creation Property it is laborious on the premise of, can be obtaining other accompanying drawings according to these accompanying drawings.

Fig. 1 is the schematic diagram of a scenario of the low-and high-frequency mixed networking system of the embodiment of the present invention.

Fig. 2 is a structural representation of the synchronous radio frame of the embodiment of the present invention.

Fig. 3 is a schematic diagram of the frame structure that the high frequency base station of the embodiment of the present invention is used.

Fig. 4 is a structural representation of the special subframe of the embodiment of the present invention.

Fig. 5 is another structural representation of the special subframe of the embodiment of the present invention.

Fig. 6 is another structural representation of the special subframe of the embodiment of the present invention.

Fig. 7 is another structural representation of the special subframe of the embodiment of the present invention.

Fig. 8 is a structural representation of the DLBP of the embodiment of the present invention.

Fig. 9 is a structural representation in the subinterval of the DLBP of the embodiment of the present invention.

Figure 10 is another structural representation of the special subframe of the embodiment of the present invention.

Figure 11 is a schematic diagram of the reception wave beam that the UE of the embodiment of the present invention is used.

Figure 12 is a schematic diagram of the sync detection window of the embodiment of the present invention.

Figure 13 is another schematic diagram of the sync detection window of the embodiment of the present invention.

Figure 14 is another schematic diagram for the reception wave beam that the UE of the embodiment of the present invention is used.

Figure 15 is a schematic diagram of the transmission wave beam that the high frequency base station of the embodiment of the present invention uses.

Figure 16 is another schematic diagram for the transmission wave beam that the high frequency base station of the embodiment of the present invention uses.

Figure 17 is another schematic diagram for the transmission wave beam that the high frequency base station of the embodiment of the present invention uses.

Figure 18 is the signal that the UE on a special subframe of the embodiment of the present invention receives synchronizing signal Figure.

Figure 19 is another of the UE reception synchronizing signals on another special subframe of the embodiment of the present invention Schematic diagram.

Figure 20 is another schematic diagram for the transmission wave beam that the high frequency base station of the embodiment of the present invention uses.

Figure 21 is another schematic diagram for the transmission wave beam that the high frequency base station of the embodiment of the present invention uses.

Figure 22 is another schematic diagram of the sync detection window of the embodiment of the present invention.

Figure 23 is the signal that the UE on a special subframe of the embodiment of the present invention receives synchronizing signal Figure.

Figure 24 is another of the UE reception synchronizing signals on another special subframe of the embodiment of the present invention Schematic diagram.

Figure 25 is the flow chart of the method for one embodiment of the invention down-going synchronous.

Figure 26 is the flow chart of the method for the down-going synchronous of another embodiment of the present invention.

Figure 27 is the structured flowchart of the user equipment of one embodiment of the invention.

Figure 28 is the structured flowchart of the user equipment of another embodiment of the present invention.

Figure 29 is the structured flowchart of the high frequency base station of one embodiment of the invention.

Figure 30 is the structured flowchart of the high frequency base station of another embodiment of the present invention.

Specific embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out Clearly and completely describe, it is clear that described embodiment is a part of embodiment of the invention, rather than Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound The every other embodiment obtained under the premise of the property made work, belongs to the scope of protection of the invention.

In the embodiment of the present invention, base station can be global mobile communication (Global System for Mobile Communication, GSM) system or CDMA (Code Division Multiple Access, CDMA base station (Base Transceiver Station, BTS)) in system, or wideband code division Base station in multiple access (Wideband Code Division Multiple Access, WCDMA) system (NodeB), can also be evolved base station in LTE system (Evolutional Node B, eNB or ENodeB), base station equipment, little base station equipment or in future 5G networks etc., the present invention to this simultaneously Do not limit.

In the embodiment of the present invention, user equipment (User Equipment, UE) can be with Jing wireless access networks (Radio Access Network, RAN) is carried out with one or more core nets (Core Network) Communication, UE can be described as access terminal, terminal unit, subscriber unit, subscriber station, movement station, mobile station, Remote station, remote terminal, mobile device, user terminal, terminal, Wireless Telecom Equipment, user agent Or user's set.UE can be cell phone, wireless phone, session initiation protocol (Session Initiation Protocol, SIP) phone, WLL (Wireless Local Loop, WLL) stand, personal Digital processing (Personal Digital Assistant, PDA), the handheld device with radio communication function, Computing device is connected to other processing equipments, mobile unit, the wearable device of radio modem And the terminal unit in future 5G networks etc..

Fig. 1 is the schematic diagram of the application scenarios of one embodiment of the invention.Show that low-and high-frequency is mixed in Fig. 1 Close group network system, including low frequency base station 11, high frequency base station 12 and UE 13.

In the embodiment of the present invention, the frequency range of low frequency base station 11 is low compared to the frequency range of high frequency base station 12. Wherein, the frequency range that low frequency base station 11 is adopted can be the low-frequency range of below 6GHz, such as 2GHz, 5GHz.The frequency range that high frequency base station 12 is adopted can be with millimeter wave frequency band (i.e. more than 6GHz) The high band of representative, for example, the frequency that high frequency base station 12 is used can be 72GHz, 28GHz Or 14GHz.

Wherein, low frequency base station 11 covers the larger region of a scope, and high frequency base station 12 is in low frequency base station Coverage in carry out focus covering, to lift the capacity of hot zones.UE 13 had generally both been equipped with low Frequency transceiver is equipped with High Frequency Transceiver again, and low frequency transceiver is used to enter row data communication with low frequency base station 11, High Frequency Transceiver is used to enter row data communication with high frequency base station 12.

UE 13 will set up normal communication link with high frequency base station 12, it is necessary first to be believed by down-going synchronous Road obtains radio frequency system down-going synchronous, then by random access procedure accesses radio frequency system again.

Fig. 2 shows that embodiment of the present invention medium-high frequency base station is sent in the frame structure that synchronizing signal is used One synchronous radio frame.It is understood that a kind of interchangeable frame of the frame structure shown in Fig. 2 for high frequency communication system Structure.

The frame length of the synchronous radio frame shown in Fig. 2 is 10 milliseconds (ms), so can be with existing LTE The frame structure of system is compatible.Wireless sub-frame of one radio frames by 10 frame lengths for 1ms is constituted.The present invention In embodiment, two kinds of wireless sub-frame is defined：General subframe and special subframe.Wherein, typically Subframe is mainly used in normal data transfer, and special subframe is used to transmit high frequency synchronization signal.

In the embodiment of the present invention, the frame structure that high frequency base station 12 is used can include two classes：Synchronous radio Frame and general radio frames.Wherein, synchronous radio frame includes at least one special subframe and multiple general subframes, General radio frames include 10 general subframes.Also, the frame length of a synchronous radio frame be 10ms, one The frame length of individual general radio frames is also 10ms.

In the embodiment of the present invention, the cycle of the synchronous radio frame that high frequency base station 12 is used can be M The length of radio frames, wherein, M is positive integer.That is, the frame structure that high frequency base station 12 is used In, M-1 general radio frames are spaced after a synchronous radio frame, reuse next synchronous radio Frame, as shown in Figure 3.In the frame structure that high frequency base station 12 is used, per M in a continuous radio frames Including a synchronous radio frame and M-1 general radio frames.

If it is understood that M=1, then it represents that, in the frame structure that high frequency base station 12 is used, each nothing Line frame is synchronous radio frame.

It is understood that the frame length of a general subframe is 1ms, the frame length of a special subframe is also 1ms. One synchronous radio frame includes at least one special subframe, and a synchronous radio frame bag is shown in such as Fig. 2 Containing two special subframes 201 and 202.

Wherein, general subframe is divided into the time slot that 8 length are 0.125ms, each time slot by Ns OFDM (Orthogonal Frequency Division Multiplexing, OFDM) symbol Number constitute.The size of Ns depends on the frequency that high frequency communication system is adopted, specifically, when frequency is During 72GHz, Ns=80；When frequency is 28GHz, Ns=40；When frequency is 14GHz, Ns=20.

Alternatively, a general subframe can be divided into multiple isometric time slots, wherein, each time slot Length can be 0.1ms to 0.2ms.For example, a general subframe can include that 10 length are 0.1ms Time slot.

Wherein, special subframe can include down-going synchronous and wave beam training interval (Downlink Synchronization＆Beam-training Period, DLBP).In addition, special subframe can also include Reserved data interval (Reserved Data Period, RDP) and up-downgoing switching guard interval (Guard Period, GP).It is understood that the special subframe in the embodiment of the present invention is used for down-going synchronous and wave beam is instructed Practice.

It should be noted that in the embodiment of the present invention, DLBP is referred to as down-going synchronous interval or wave beam instruction Practice interval etc., the interval title is not construed as limiting here.

The order of the DLBP that the embodiment of the present invention is included to special subframe and RDP or position do not limit It is fixed, as shown in Figures 4 to 7.As Fig. 4 shows that DLBP originates in first OFDM symbol, and Up RDP terminates at the situation of last (being assumed to be Nm) OFDM symbol.As Fig. 5 shows Go out up RDP and originate in first OFDM symbol, and DLBP terminates at last and (assumes For Nm) situation of OFDM symbol.As Fig. 6 shows that descending RDP originates in first OFDM Symbol, terminates at kth 1-1 (k1>1) individual OFDM symbol, DLBP originates in 1 OFDM of kth Symbol, and up RDP terminates at the situation of last (being assumed to be Nm) OFDM symbol. As Fig. 7 shows that up RDP originates in first OFDM symbol, and DLBP terminates at kth 2 (k2<Nm) individual OFDM symbol, descending RDP originates in k2+1 OFDM symbol, terminates at The situation of last (being assumed to be Nm) OFDM symbol.

In the embodiment of the present invention, DLBP may include Nu subinterval, as shown in figure 8, Nu sub-district Between be：DLBP₀, DLBP₁..., DLBP_Nu-2, DLBP_Nu-1.Each subinterval can by Nd when Between piece (Slice) composition.As Fig. 8 shows first subinterval DLBP₀Including Nd timeslice, Respectively：S₀, S₁..., S_Nd-1.Wherein, the size of Nu and Nd sends respectively with high frequency base station 12 The number that the number of broad beam receives broad beam with user equipment 13 is corresponding, and its value is logical depending on high frequency The frequency that letter system is adopted.As one, when frequency is 72GHz, Nd=16 or 12, Nu=12. When frequency is 28GHz, Nd=12, Nu=8.When frequency is 14GHz, Nd=8, Nu=6.

It is understood that in the embodiment of the present invention, Ns, Nd and Nu are the positive integer more than 1, and The value of Ns, Nd and Nu is all relevant with the frequency that system medium-high frequency base station is used.

Wherein, the value of Nu is not only relevant with frequency, but also relevant with the performance of UE itself.For example, When frequency is 28GHz, the Nu=8 of some UE, the Nu=12 of another UE.

In addition, each subinterval may also include Nd switch protecting being located at respectively after Nd timeslice Interval (Switching Guard Period, SGP).

In the embodiment of the present invention, the length of a timeslice can be Nr OFDM symbol, wherein, Nr is positive integer.

For example, Nr can be 1.

For example, Nr can be 2.That is, the length of each timeslice includes two OFDM symbols.Wherein, The first OFDM symbol in two OFDM symbols is used to send master sync signal (Primary Synchronization Signal, PSS), the second OFDM symbol in two OFDM symbols is used to send out Send auxiliary synchronous signals (Secondary Synchronization Signal, SSS).As shown in figure 9, the time Piece S₀Including two OFDM symbols, it is respectively used to send SSS and PSS.

For example, Nr can be more than 2.That is, the length of each timeslice includes at least two OFDM symbols. Wherein, the first OFDM symbol at least two OFDM symbols is used to send PSS, and at least two The second OFDM symbol in OFDM symbol is used to send SSS.That is, Nr OFDM symbol At least one OFDM symbol is used to send PSS in number；In Nr OFDM symbol at least one OFDM symbol is used to send SSS.

On frequency domain, PSS and SSS is transmitted by middle W megahertz of system bandwidth, typically W=500.It is similar with LTE system, transmit PSS's in some specific cell of given high frequency base station Particular sequence, for indicating its cell ID in a high frequency base station to UE 13, it is assumed that a high frequency Base station at most 6 high frequency cells of control, then the value of high frequency cell ID is 0～5.

Specifically, the second OFDM symbol can send the particular sequence of SSS.Wherein, the specific sequence Row include the mark (Identity, ID) and the particular sequence of the timeslice that the particular sequence is located The ID in the subinterval at place.

Or, particular sequence can include following at least one：It is the ID of the high frequency base station, described specific The ID in the subinterval that timeslice the and described particular sequence that sequence is located is located.Or, specific sequence Row can include following at least one：The timeslice that the ID of the high frequency base station, the particular sequence are located On used transmission wave beam ID and the particular sequence be located subinterval ID.The present invention is right This is not construed as limiting.

For example, certain special time that can be in the subinterval of the specific DLBP of certain of high frequency base station The particular sequence of SSS, for indicating to UE 13, its high frequency base station IDs, spy for being located are transmitted on piece Determine the high frequency base station used on the subinterval ID (value is 0～Nu-1) and the special time piece of DLBP Transmission wave beam ID or timeslice ID (value be 0～Nd-1).

Specifically, UE 13 first carries out noncoherent detection to PSS, obtains sign synchronization and to obtain high frequency little Area ID.Assume that the channel relevant persistent period is much larger than an OFDM symbol cycle, using PSS and SSS Dependency, relevant detection is carried out to SSS, obtain high frequency base station IDs, DLBP subinterval ID with And base station sends wave beam ID (timeslice ID).Due in a special subframe, the subinterval of DLBP ID and base station send OFDM symbol position in the special subframe that wave beam ID (timeslice ID) and SSS is located It is one-to-one to put, therefore acquisition above- mentioned information can know OFDM in the special subframe that SSS is located Character position, can obtain radio frame synchronization.As shown in Figure 10, it is assumed that UE 13 successfully be detected DLBP₁ The PSS signals that subinterval sends, by PSS signals to DLBP₁The SSS signals that subinterval sends enter The relevant detection of row.It is 1 to obtain DLBP subintervals ID, and base station sends wave beam ID (timeslice ID) For 1, then from SSS places character position, a DLBP cycle plus a timeslice cycle are pushed away forward i.e. The original position of special subframe can be obtained, the position according to special subframe in radio frames then can be direct The position of radio frames starting point is released, radio frame synchronization is successfully obtained.For having two in a radio frames Or the situation of multiple special subframes, need the sequence by indicating high frequency base station IDs special to distinguish each Subframe.

Wherein, the description with regard to sending wave beam may refer to following specific embodiment.

In the embodiment of the present invention, high frequency base station 12 can adopt synchronous radio frame as previously shown to send synchronous Signal.Specifically, on a special subframe (such as subframe #1 in Fig. 2), DLBP each Subinterval, high frequency base station 12 can send synchronous letter in Nd timeslice using different transmission wave beams Number.In other words, in each subinterval, high frequency base station 12 can pass through the transmission of Nd the first order Wave beam sends Nd synchronizing signal.It is also to be understood that on the DLBP of a special subframe, high frequency Base station 12 sends Nd synchronizing signal by the transmission wave beam of Nd the first order, and the transmission cycle is Nu。

For example, the first order can be #0 to #Nd-1.For example, in timeslice S₀It is upper to pass through to send Wave beam #0 sends synchronizing signal, in timeslice S₁It is upper to send synchronizing signal ... by sending wave beam #1, In timeslice S_Nd-1It is upper to send synchronizing signal by sending wave beam #Nd-1.Wherein, SGP is used for different sending out Send the switching between wave beam.With reference to Fig. 8, it is appreciated that the ID of timeslice can also be the ID for sending wave beam.

With reference to Fig. 8, it will be understood that on DLBP, determined as the cycle with Nu and send wave beam, wherein week What phase property was used sends the Nd transmission wave beam that wave beam is the first order.

In the embodiment of the present invention, a special subframe can be considered several reserved OFDM symbols Number.So, the process of the above-mentioned transmission of high frequency base station 12 synchronizing signal can be understood as：High frequency base station 12 On several reserved continuous transmission symbol (special subframe), cut with a fixed transmission wave beam Change the cycle (Nu cycle), and a fixed transmission wave beam logical order (#0, #1 ..., #Nd-1), Switching successively sends wave beam and sends synchronizing signal.

It should be noted that the logical order (the i.e. first order) of transmission wave beam here is not limited to #0 to #Nd-1. For example, it is also possible to be #1, #2 ..., #Nd-1, #0；Or can also be #Nd-1, #Nd-2 ..., #1, #0 etc..

So, UE 13 can be completed and height after the synchronizing signal for receiving the transmission of high frequency base station 12 The synchronization of frequency base station 12 simultaneously sets up normal communication link.

Specifically, UE can receive synchronous letter in a subinterval by a fixed reception wave beam Number.In different subintervals, UE 13 switches different reception wave beams to receive synchronizing signal.Namely Say, UE receives wave beam and corresponds to the wave beam received on Nu subinterval respectively by Nu.Such as Figure 11 institutes Show.UE receives subinterval DLBP by receiving wave beam #0₀On synchronizing signal, by receive wave beam #1 Receive subinterval DLBP₁On synchronizing signal ..., receive subinterval by receiving wave beam #Nu-1 DLBP_Nu-1On synchronizing signal.

For low-and high-frequency mixed networking system as shown in Figure 1, UE 13 can be quick by low frequency auxiliary Obtain the down-going synchronous of radio frequency system.As Figure 12 shows the nothing of serial number #k of low frequency base station 11 The synchronous radio frame of one serial number #k of line frame and high frequency base station 12.Wherein, 0 to 9 subframe is represented Sequence number.

Although it should be noted that the synchronous radio of serial number #k of the high frequency base station 12 shown in Figure 12 Frame includes two special subframes, the respectively subframe of serial number 1 and serial number 6.But, the present invention is right The number of the special subframe included by one synchronous radio frame is not construed as limiting, for example, a synchronous radio frame A special subframe can be only included, or, a synchronous radio frame can also include more special sons Frame (3,4 etc.).

Although it should be noted that the special subframe shown in Figure 12 include DLBP, GP and RDP, Structure not limited to this of the present invention to special subframe, the correlation that specifically may refer to aforementioned Fig. 2 to Fig. 7 is retouched State.

Assume low-and high-frequency can stringent synchronization, UE 13 is obtained in that high frequency base station 12 by low frequency base station 11 Frame synchronization, that is to say, that UE 13 can determine the initial time of the subframe 0 of high frequency base station 12, so Afterwards UE 13 just can be with the starting of the special subframe in the high frequency base station 12 (such as the subframe of serial number 1) At the moment, carry out high frequency downlink synchronous signal detection.

Specifically, the length of sync detection window is the length of the DLBP defined in special subframe, one In individual sync detection window, UE 13 can travel through the transmission wave beam and UE 13 of all of high frequency base station 12 Reception wave beam combination.So, UE 13 can obtain high frequency system by a sync detection window The down-going synchronous of system, while obtaining the reception wave beam for sending wave beam and UE 13 of corresponding high frequency base station 12 No. ID, cell ID, subinterval ID included by DLBP etc..

However, for the system of the low-and high-frequency mixed networking shown in Fig. 1, the low-and high-frequency that UE 13 is received Signal is difficult to accomplish stringent synchronization.For example, it is low if low frequency base station 11 is not co-located with high frequency base station 12 Frequency base station 11 and high frequency base station 12 are it cannot be guaranteed that be obtained in that strict time synchronized.Again for example, UE 13 Distance to low frequency base station 11 is differed with the distance to high frequency base station 12, respectively from the He of low frequency base station 11 The signal that high frequency base station 12 sends experienced different propagation paths, cause the difference in signal transmission time delay It is different.It can be seen that, the low frequency signal of the low frequency base station 11 that UE 13 is received and the high frequency of high frequency base station 12 are believed Number stringent synchronization is difficult, can typically there is a low-and high-frequency time delay between the two, and this low-and high-frequency time delay It is to change with the change in location of UE 13.

As shown in figure 1, UE 13 is relatively near apart from high frequency base station 12, apart from low frequency base station 11 farther out.That , the signal that low frequency base station 11 sends with high frequency base station 12 in synchronization, the high frequency that UE 13 is received Signal can be reached first, and the low frequency signal of reception is then reached afterwards, and as shown in figure 13, low frequency signal is believed with high frequency There is low-and high-frequency time delay between number.Wherein, with regard to the description of low-frequency wireless frame and the synchronous radio frame of high frequency With the corresponding contents in Figure 12, repeat no more here.

Now, the low frequency signal that UE 13 can send according to low frequency base station determines that high frequency base station synchronization is detected The original position of window.Wherein, the time span of sync detection window is equal to the time span of DLBP. Further, UE 13 is from the beginning of the original position of sync detection window, using Nu different received wave Beam receives synchronizing signal.Wherein, each receives wave beam and receives Nd synchronizing signal.That is, the Nu is not Same reception wave beam receives respectively Nu group synchronizing signals, wherein, every group of synchronizing signal includes Nd synchronously Signal.

It is understood that before high-frequency synchronous are carried out, UE 13 also receives the low frequency signal of low frequency base station transmission.

It should be noted that in the follow-up embodiment of Figure 13 and the present invention, the original position of sync detection window In special subframe.But the present invention is not limited this.For example, in other circumstances, it is synchronous The original position of detection window can also be located in general subframe.

If UE 13 using low frequency signal as reference synchronization point, in special subframe (serial number 1 and 6 Subframe) sync detection window on can detect high frequency synchronization signal.Due to there is low-and high-frequency time delay, UE 13 can be caused actually to synchronize the sync detection window (sync detection window in Figure 13) of detection, With the sync detection window (sync detection window in Figure 12, with DLBP pair that should synchronize detection Should) skew is there occurs, this will cause UE 13 in sync detection window from traveling through all of high frequency base station The combination of the 12 reception wave beam for sending wave beam and UE 13.So as to the send wave that high frequency base station 12 occurs The detection disappearance problem of the combination of the reception wave beam of beam and UE 13.And due to the synchronization of special subframe transmission Signal is periodically, therefore there is the reception wave beam for sending wave beam and UE 13 of high frequency base station 12 Combination cannot be detected (i.e. arbitrary special subframe has the detection disappearance) forever, and this will lead Cause the synchronization failure of certain user.

Due to the randomness of low-and high-frequency time delay, the synchronous start time point of UE 13 it cannot be guaranteed that with synchronous symbol The start time point alignment of number (DLBP), this will cause the sampled point of certain synchronizing symbol can not be by Receive completely, then the synchronizing signal on the symbol cannot be properly detected.As shown in figure 14, UE 13 If synchronous start time point fall in S₀In check frequency, then in timeslice S₀It is upper to pass through high frequency base station The synchronizing signal that 12 transmission wave beam #0 send can not be properly detected.

In this regard, in the embodiment of the present invention, the transmission wave beam that the synchronizing signal that high frequency base station 12 sends is used Form can be：On the first special subframe, high frequency base station 12 is sent out using the transmission wave beam of the first order Send synchronizing signal；On the second special subframe, high frequency base station 12 is sent using the transmission wave beam of the second order Synchronizing signal.Wherein, the second order can be circulated displacement by the first order to generate.Also, Low-and high-frequency time delay of the length of the timeslice of the cyclic shift more than system.

In the embodiment of the present invention, high frequency base station 12 is sent in the frame structure that synchronizing signal is used, including many Individual synchronous radio frame.

If the number of the special subframe in each synchronous radio frame includes for the synchronous radio frame of 1, i.e., One special subframe.So, aforesaid first special subframe can be special in the first synchronous radio frame Subframe, the second special subframe can be the special subframe in the second synchronous radio frame.Wherein, second is synchronous Radio frames are the next synchronous radio frame adjacent with the first synchronous radio frame.That is, for two Continuous synchronous radio frame, the transmission wave beam order that respective special subframe is used is different, specifically, Special subframe in first synchronous radio frame sends wave beam using the first order, in the second synchronous radio frame Special subframe sends wave beam using the second order.

It should be noted that the second synchronous radio frame mentioned here refers to after the first synchronous radio frame One synchronous radio frame.For example, the first synchronous radio frame can be the synchronous radio frame 301 in Fig. 3, Second synchronous radio frame can be the synchronous radio frame 302 in Fig. 3.

If the number of the special subframe in each synchronous radio frame is the synchronous radio frame bag of even number, i.e., Include 2N special subframe.So, aforesaid first special subframe can be in a synchronous radio frame The 2i special subframe, the second special subframe can be 2i+1 special son in a synchronous radio frame Frame.

If the number of the special subframe in each synchronous radio frame is the synchronous radio frame bag of odd number, i.e., Include 2N+1 special subframe.So, aforesaid first special subframe can be in the first synchronous radio frame 2i special subframe or for the 2i+1 special subframe in the second synchronous radio frame, the second special son Frame can be 2i+1 special subframe in the first synchronous radio frame or for the second synchronous radio frame in the 2i special subframe.

Kind of a understanding is changed, all of radio frames that can be used high frequency base station 12 are examined as an entirety Consider.For the special subframe in all radio frames carries out sequentially serial number, wherein, the serial number From the beginning of 0, or from the beginning of 1, or from the beginning of any value, can here be not construed as limiting.Enter one Step ground, can be defined as the first special subframe by the special subframe that numbering is odd number, be even number by numbering Special subframe is defined as the second special subframe.Or, it is also possible to by the special subframe definition that numbering is even number For the first special subframe, the special subframe that numbering is odd number is defined as into the second special subframe.

The quantity of the special subframe included due to a synchronous radio frame is at least 1, then for whole nothings The quantity of the special subframe in line frame (at least two synchronous radio frames) is at least two.And it is possible to Serial number is carried out at least two special subframes.For example, the numbering of at least two special subframes can be Special subframe #0, special subframe #1, special subframe #2 ... etc..Again for example, at least two special subframes Numbering can be special subframe #1, special subframe #2, special subframe #3 ... etc..

The following embodiments of the present invention are illustrated so that a synchronous radio frame includes two special subframes as an example. Assume that a synchronous radio frame includes two special subframes.As an example it is assumed that 10 of synchronous radio frame Subframe be subframe #0, subframe #1 ..., subframe #8 and subframe #9.Wherein, subframe #1 and subframe #6 are Special subframe.It is possible to two special subframes are numbered as special subframe #0 and special subframe #1, or be numbered as special subframe #1 and special subframe #2.

Alternatively, as one embodiment, subframe #1 can be defined as the first special subframe, by subframe #6 is defined as the second special subframe.So, can be on the first special subframe, using the first order send wave Beam；On the second special subframe, using the second order wave beam is sent.

Or, in described two special subframes in the special subframe of serial number odd number, the Nd is same Step signal is that high frequency base station 12 is transmitted using the wave beam that sends of Nd the first order.Described two In individual special subframe in the special subframe of serial number even number, the Nd synchronizing signal is high frequency base station 12 It is transmitted using the transmission wave beam of Nd the second order.Here, the second order can be by described First sequentially passes through cyclic shift generation.In other words, the first special subframe DLBP sub-district Interior, high frequency base station 12 sends wave beam and sends synchronizing signal with the first specific order successively switching, the In the subinterval of the DLBP of two special subframes, high frequency base station 12 is sent out with the second specific order successively switching Wave beam is sent to send synchronizing signal.Described second is sequentially specifically the cyclic shift of the first specific order.

For example, subframe #1 is special subframe #0, and subframe 6 is special subframe #1.That is, sub Frame #1 is the special subframe that sequence number is even number, and subframe #6 is special subframe that sequence number is odd number.So, son Frame #6 can use the transmission wave beam of the first order, subframe #1 to use the transmission wave beam of the second order, As shown in figure 15, timeslice S in figure_iExpression uses transmission wave beam #i to send synchronizing signal.Wherein, First order is #0 to #Nd-1, and the second order is #K to #Nd-1, #0 to #K-1.That is, the second order Be first sequentially pass through after the cyclic shift of K positions generate.

For example, subframe #1 is special subframe #1, and subframe 6 is special subframe #2.That is, sub Frame #1 is the special subframe that sequence number is odd number, and subframe #6 is special subframe that sequence number is even number.So, son Frame #1 can use the transmission wave beam of the first order, subframe #6 to use the transmission wave beam of the second order, As shown in figure 16, timeslice S in figure_iExpression uses transmission wave beam #i to send synchronizing signal.Wherein, First order is #0 to #Nd-1, and the second order is #K to #Nd-1, #0 to #K-1.That is, the second order Be first sequentially pass through after the cyclic shift of K positions generate.

Specifically, in the embodiment, high frequency base station 12 is in the first special subframe (subframe #6 in Figure 15 Or subframe #1 in Figure 16) in, send wave beam logical order switching transmission wave beam according to normal, that is, exist Subinterval #0～the #Nu-1 of each DLBP is interior to be cut successively according to the logical sequence number #0 to #Nd-1 for sending wave beam Change and send wave beam to send synchronizing signal.High frequency base station 12 is in the second special subframe (subframe #1 in Figure 15 Or subframe #6 in Figure 16) in, in the subinterval of each DLBP according to cyclic shift after send wave The switching of beam logical order sends wave beam, i.e., successively according to transmission in each DLBP subinterval #0～#Nu-1 Logical sequence number #K to #Nd-1 to #0 to the #K-1 switchings of wave beam send wave beam and send synchronizing signal.

As another understanding, in described two special subframes in the DLBP of the special subframe of serial number odd number, The Nd synchronizing signal is that high frequency base station 12 is transmitted using the transmission wave beam of Nd the first order 's.In described two special subframes in the DLBP of the special subframe of serial number even number, the Nd same Step signal is that high frequency base station 12 is transmitted using the wave beam that sends of Nd the second order.In other words, In the DLBP of the first special subframe, high frequency base station 12 switches successively send wave with the first specific order Beam sends synchronizing signal, and in the DLBP of the second special subframe, high frequency base station 12 is specific suitable with second Sequence switches successively transmission wave beam and sends synchronizing signal.Described second is sequentially specifically the first specific order Cyclic shift.

In this kind of explanation, DLBP is circulated displacement as an entirety.For shown in Figure 16 As shown in figure 17, subframe #1 can use the transmission wave beam of the first order, subframe for another explanation of situation #6 can use the transmission wave beam of the second order.Wherein, the first order be #0 to #Nd-1, #0 extremely #Nd-1 ..., #0 to #Nd-1, the second order be #K to #Nd-1, #0 to #Nd-1 ..., #0 to #Nd-1, #0 to #K-1.That is, the second order be first sequentially pass through after the cyclic shift of K positions generate.Here, One order is that Nu #0 to #Nd-1, i.e. the first order include Nu × Nd transmission wave beam.

That is, high frequency base station 12 is in the first special subframe (subframe #1 as shown in figure 17), The transmission wave beam that wave beam logical order switches base station is sent according to normal, i.e., in the subinterval #0 of DLBP Wave beam is sent to #Nu-1 according to logical sequence number #0 to the #Nd-1 switchings for sending wave beam successively send synchronous Signal.High frequency base station 12 in the second special subframe (subframe #6 as shown in figure 17), in DLBP The interior transmission wave beam that wave beam logical order switches base station that sends according to after cyclic shift, i.e. DLBP₀Before K sends wave beam (#0 to #K-1), is displaced to DLBP_Nu-1After send.High frequency base station 12 is special second Different subframe, first switches successively DLBP₀Logical sequence number in subinterval is sent out for the transmission wave beam of #K～#Nd-1 Synchronizing signal is sent, then in DLBP₁～DLBP_Nu-1Successively according to the logical sequence number for sending wave beam in subinterval #0～#Nd-1 switchings send wave beam and send synchronizing signal, finally, then switch DLBP successively₀In subinterval Logical sequence number sends synchronizing signal for the transmission wave beam of #0～#K-1.

It should be understood that in the embodiment of the present invention, although by with the different explanation high frequency base of above two The transmission wave beam that 12 transmission synchronizing signals of standing are used, but Figure 16 and Figure 17 actual transmission wave beam is Identical.

It should be noted that length (the S of the timeslice of the cyclic shift in Figure 15 to Figure 17₀To S_KWhen corresponding Between piece length) should be greater than the low-and high-frequency time delay (length of the low-and high-frequency time delay i.e. shown in Figure 13 of system Degree).

Specifically, high frequency base station 12, can first true defining K value before synchronizing signal is sent.For example, The value of one or more K can be preset in high frequency base station 12, high frequency base station 12 is sending synchronous letter Number before, can first according to the true defining K value of the indexs such as coverage, then reuse determined by K values really Fixed first order and the second order, and send synchronizing signal.

It should be noted that in the embodiment shown in Figure 15 to Figure 17, S_iRepresent and sent using transmission wave beam #i Synchronizing signal.

Understand as another kind of, if it is assumed that transmission wave beam #0, #1 ... that high frequency base station 12 is used, The ID of #Nd is respectively 0,1 ..., Nd.So, the transmission wave beam that above-mentioned transmission synchronizing signal is used Mode can be understood as：

In timeslice Si of the DLBP of the first special subframe, the ID of the transmission wave beam for being used is： b_i=imodN_dI=0,1,2..., N_d×N_u-1。

In timeslice Si of the DLBP of the second special subframe, the ID of the transmission wave beam for being used is： b_i=(i+K) modN_dI=0,1,2..., N_d×N_u-1。

Wherein, the quantity of the timeslice that special subframe includes is N_d×N_u。

Assume that the low frequency synchronisation signal that UE 13 is received lags behind high frequency synchronization signal, with Nd=12, Nu=12 As a example by, Figure 18 and Figure 19 sets forth the first special subframe and the synchronous letters of the second special subframe UE 13 Number reception condition.

In the first special subframe, as shown in figure 18, due to the introducing of low-and high-frequency time delay Δ t so that UE 13 start to synchronize signal with reception wave beam #0 from second timeslice (first S1 in Figure 18) Detection.Because the initial time that UE 13 starts synchronization signal detection is located in the middle of timeslice S1, therefore The synchronizing signal for sending wave beam #1 transmissions by high frequency base station 12 in timeslice S1 can not be complete by UE 13 Whole reception.Due to when the switching cycle that UE 13 receives wave beam completes Nd=12 equal to high frequency base station 12 Between synchronizing signal sends on piece cycle, this is resulted in, and UE 13 can not on all of reception wave beam High frequency base station 12 is had correctly received by sending the synchronizing signal that wave beam #1 sends.In addition, due to More than the length of timeslice, last receives wave beam and misses low-and high-frequency time delay Δ t to cause UE 13 Receive the synchronizing signal sent in a timeslice.As shown in figure 18, UE 13 receives wave beam #11's at it In the reception cycle, it is impossible to receive high frequency base station 12 by sending the synchronizing signal that wave beam #0 sends.

In the second special subframe, as shown in figure 19, the transmission wave beam order in the first special subframe is done Cyclic shift, needs the timeslice total length shared by K wave beam of cyclic shift more than low-and high-frequency time delay Δ t, As shown in figure 19, K=2 starts to send synchronizing signal from wave beam #2 is sent.In the first special subframe Similar, due to the introducing of low-and high-frequency time delay Δ t so that UE 13 is from second timeslice (in Figure 19 First S3) start to synchronize the detection of signal with receiving wave beam #0.Because UE 13 starts synchronization The initial time of signal detection is located in the middle of timeslice S3, therefore passes through high frequency base station 12 in timeslice S3 Sending the synchronizing signal of wave beam #3 transmissions can not completely be received by UE 13.Because UE 13 receives wave beam Switching cycle be equal to the cycle that high frequency base station 12 completes the transmission of synchronizing signal in Nd=12 timeslice, This is resulted in, and UE 13 can not have correctly received high frequency base station 12 by sending out on all of reception wave beam The synchronizing signal for sending wave beam #3 to send.In addition, because low-and high-frequency time delay Δ t is more than a timeslice Length, last receives wave beam and misses and receives the synchronous letter sent in a timeslice to cause UE 13 Number.As shown in figure 19, UE 13 is within the reception cycle that it receives wave beam #11, it is impossible to receive high frequency Base station 12 is by sending the synchronizing signal that wave beam #2 sends.In the second special subframe, UE 13 can connect It is received in the synchronizing signal that can not be properly received in the first special subframe.As shown in figure 19, high frequency base station 12 by sending the synchronizing signal that wave beam #1 sends in timeslice S1, and high frequency base station 12 by sending Wave beam #0 sends, the synchronizing signal that UE 13 is received by wave beam #11.

The synchronizing signal search that UE 13 passes through the first special subframe and the second special subframe, can travel through institute Some high frequency base stations 12 send wave beam and UE 13 receives the combination of wave beam, obtain the synchronization of radio frequency system.

Or, in the embodiment of the present invention, the send wave for being used of the synchronizing signal that high frequency base station 12 sends The form of beam can also be as described below：

Each special subframe in synchronous radio frame also includes being located at the cyclic suffix (Cyclic after DLBP Suffix, CS), CS is used to transmit K synchronizing signal, wherein, K is the positive integer less than Nd. That is, CS includes K timeslice.

Now, high frequency base station 12 is in the subinterval of each DLBP, using the transmission of Nd the first order Wave beam sends Nd synchronizing signal.On CS, before in the transmission wave beam of Nd the first order K sends wave beam and sends K synchronizing signal.

So that a synchronous radio frame includes two special subframes as an example, as shown in figure 20, wherein, subframe #1 It is special subframe with subframe #6.By taking subframe #1 as an example, including DLBP and after DLBP CS.Nd synchronizing signal is transmitted in each subinterval of DLBP, and the Nd synchronizing signal is high frequency base station 12 send what wave beam was transmitted using individual first orders of Nd, and the first order shown in Figure 20 is #0, #1 ..., #Nd-1.CS transmits K synchronizing signal, and the K synchronizing signal is that high frequency base station 12 makes Send what wave beam was transmitted with first K sent in wave beam of Nd the first order, CS in Figure 20 The transmission wave beam for using is：#0, #1 ..., #K-1.

Used as another kind of understanding, the embodiment can also be construed to：Special subframe is also included positioned at described Cyclic Prefix (Cyclic Prefix, CP) before DLBP, the CP transmits K synchronizing signal. That is, CP includes K timeslice.Now, high frequency base station 12 is in the subinterval of each DLBP, Nd synchronizing signal is sent using the transmission wave beam of Nd the first order.On CP, using Nd Latter K sent in wave beam of first order sends wave beam and sends K synchronizing signal.

As shown in figure 21, wherein CP is located at before DLBP.Each subinterval transmission Nd of DLBP Individual synchronizing signal, the Nd synchronizing signal is the send wave that high frequency base station 12 uses Nd the first order What beam was transmitted, the first order shown in Figure 21 is #0, #1 ..., #Nd-1.CP uses transmission K synchronizing signal, the K synchronizing signal is the send wave that high frequency base station 12 uses Nd the first order Latter K in beam sends what wave beam was transmitted, and the transmission wave beam that CP is used in Figure 21 is：#Nd-K, #Nd-K+1 ..., #Nd-1.

If it is understood that the first order be #Nd-K, #Nd-K+1 ..., #Nd-1, #0, #1 ..., #Nd-K-1, then, Figure 21 is it can be appreciated that CS is located at after DLBP.Therefore, Figure 20 and Tu The 21 transmission wave beams for using are consistent.

It should be noted that the length of the timeslice of the CP in the CS and Figure 21 in Figure 20 (K timeslice Length) should be greater than the low-and high-frequency time delay (length of the low-and high-frequency time delay i.e. shown in Figure 13) of system.

Specifically, high frequency base station 12, can first true defining K value before synchronizing signal is sent.For example, The value of one or more K can be preset in high frequency base station 12, high frequency base station 12 is sending synchronous letter Number before, can first according to the true defining K value of the indexs such as coverage, then reuse determined by K values really Determine CS or CP, and send synchronizing signal.

It should be noted that in the embodiment shown in Figure 20 to Figure 21, S_iRepresent and sent using transmission wave beam #i Synchronizing signal.

In timeslice Si (including DLBP and CS or CP) of special subframe, the transmission for being used The ID of wave beam is：b_i=imodN_dI=0,1,2..., N_d×N_u+K-1。

Wherein, the quantity of the timeslice that special subframe includes is N_d×N_u+K。

Now, the low frequency signal that UE 13 can send according to low frequency base station determines the first sync detection window First start bit put.Subsequently, from the beginning of UE 13 puts from the first start bit of the first sync detection window, Synchronizing signal is received using Nu different reception wave beam.Wherein, each receives wave beam and receives Nd together Step signal.That is, the Nu different reception wave beam receives respectively Nu group synchronizing signals, wherein, per group Synchronizing signal includes Nd synchronizing signal.The low frequency letter that UE 13 further can send according to low frequency base station Number and additional receptive time delay determine the second original position of the second sync detection window.Subsequently, UE 13 from Second original position of the second sync detection window starts, and receives same using Nu different reception wave beam Step signal.Wherein, each receives wave beam and receives Nd synchronizing signal.That is, the Nu different reception Wave beam receives respectively Nu group synchronizing signals, wherein, every group of synchronizing signal includes Nd synchronizing signal.

Wherein, the time span of the first sync detection window is equal to the time span of DLBP, and second is synchronous The time span of detection window is equal to the time span of DLBP.

Wherein, the second special subframe can be first special subframe after the first special subframe. For example, for synchronous radio frame as shown in Figure 2, the first special subframe can be subframe #1, the Two special subframes are subframe #6.

Wherein, the length of additional receptive time delay is more than the low-and high-frequency time delay of the system, the CS and CP The length of shared timeslice more than or equal to the low-and high-frequency time delay and the additional receptive time delay it With.

Wherein, additional receptive time delay can be preset in UE 13, or, during the additional receptive It can be that UE 13 is obtained from low frequency base station 11 to prolong, for example, can be by receiving low frequency base station 11 The low frequency signaling sent obtains the additional receptive time delay.

Wherein, additional receptive time delay can be pre-configured to be in UE 13 according to the low-and high-frequency time delay of system. Or, low frequency base station 11 determines additional receptive time delay according to the low-and high-frequency time delay of system, and by additional receptive Time delay is sent to UE 13.

For example, before radio frequency system is accessed, low frequency base station 11 can be by sending low frequency for UE 13 (for example, the low frequency signaling can be wireless heterogeneous networks (Radio Resource Control, RRC) to signaling Signaling) notify the additional receptive time delay (for example, Δ t of UE 13_a)。

Assume that the low frequency synchronisation signal that UE 13 is received lags behind high frequency synchronization signal, as shown in figure 22, Starting of the initial time of the special subframe that UE 13 is obtained using low frequency synchronisation as the first sync detection window Point, starts the detection of the first high frequency synchronization signal, and the length of the first sync detection window is the length of DLBP. The initial time of the next adjacent special subframe that UE 13 is obtained with low frequency synchronisation is delayed one and additional is connect Time receiving prolongs as the starting point of the second sync detection window, beginning the second high frequency synchronization signal detection.

Specifically, above-mentioned Cyclic Prefix or cyclic suffix length of an interval degree, i.e., it is total shared by K wave beam Time leaf length need to be more than the summation of low-and high-frequency time delay and additional receptive time delay.

Assume that the low frequency synchronisation signal that UE 13 is received lags behind high frequency synchronization signal, with Nd=12, Nu=12 As a example by, Figure 23 and Figure 24 sets forth the first special subframe and the synchronous letters of the second special subframe UE 13 Number reception condition.Wherein, K=4.Wherein, the first sync detection window of Figure 23 correspondences, Figure 24 correspondences Second sync detection window.

In the first special subframe, as shown in figure 23, due to the introducing of low-and high-frequency time delay Δ t so that UE 13 start to synchronize signal with reception wave beam #0 from second timeslice (first S1 in Figure 23) Detection.Because the initial time that UE 13 starts synchronization signal detection is located in the middle of timeslice S1, therefore The synchronizing signal for sending wave beam #1 transmissions by high frequency base station 12 in timeslice S1 can not be complete by UE 13 Whole reception.Due to when the switching cycle that UE 13 receives wave beam completes Nd=12 equal to high frequency base station 12 Between synchronizing signal sends on piece cycle, this is resulted in, and UE 13 can not on all of reception wave beam High frequency base station 12 is had correctly received by sending the synchronizing signal that wave beam #1 sends.However, due to existing CP, and the length of the timeslice shared by CP is more than low-and high-frequency time delay.As shown in figure 23, UE 13 exists It was received in the reception cycle of wave beam #11, can be received high frequency base station 12 and be sent by sending wave beam #0 Synchronizing signal.

In the second special subframe, as shown in figure 24, the second sync detection window additionally introduces additional Receive time delay Δ t_a, additional receptive time delay Δ t_aLow-and high-frequency time delay Δ t need to be more than or equal to, that is, have Δ t_a>Δt。 It is similar with the first sync detection window, due to low-and high-frequency time delay Δ t and additional receptive time delay Δ t_aIntroducing, UE 13 starts the initial time of the second synchronization signal detection and is located in the middle of timeslice S3, therefore timeslice S3 It is upper completely to be received by UE 13 by the synchronizing signal for sending wave beam #3 transmissions of high frequency base station 12. Because the switching cycle that UE 13 receives wave beam completes same in Nd=12 timeslice equal to high frequency base station 12 In the cycle that step signal sends, this is resulted in, and UE 13 can not be properly received on all of reception wave beam To high frequency base station 12 by sending the synchronizing signal that wave beam #3 sends.In second sync detection window, UE 13 The synchronizing signal that can not be properly received in the first special subframe can be received.As shown in figure 24, base station By send synchronizing signal that wave beam #1 sent in timeslice S1 can the second sync detection window by into Work(is detected.

The synchronizing signal search that UE 13 passes through the first sync detection window and the second sync detection window, energy The combination that all of high frequency base station 12 sends wave beam and the reception wave beams of UE 13 is enough traveled through, radio frequency system is obtained Synchronization.

It should be noted that in the embodiment of the present invention, before UE 13 is linked into radio frequency system, can also include： Low frequency base station 11 to UE 13 sends low frequency signaling (for example, RRC signaling).The low frequency signaling can be wrapped Include at least one of：Sub-district included by additional receptive time delay, the frequency of radio frequency system and DLBP Between number (i.e. the value of Nd).

Specifically, UE 14 needs the length for knowing DLBP subintervals in advance to successfully obtain frame synchronization Degree, i.e., in radio frequency system in DLBP subintervals timeslice number, i.e. the transmission wave beam of high frequency base station 12 Number Nd.The transmission wave beam number of the number of timeslice, i.e. high frequency base station 12 in the DLBP subintervals Nd can be preset as a fixed value related to frequency by standard, for example, for 72GHz, 28GHz And 14GHz systems, typical Nd can be respectively set as 16,12 and 8.UE 13 can pass through Low frequency signaling obtains the frequency of the radio frequency system to be accessed, and can obtain the Nd values.Or, UE 13 Directly the Nd values can be obtained by low frequency signaling, i.e., before radio frequency system is accessed, low frequency base station 11 The frequency of the radio frequency system for notifying to be accessed needed for UE 13 by its low frequency signaling (for example, RRC signaling) And/or in radio frequency system in DLBP subintervals timeslice number, i.e. the transmission wave beam of high frequency base station 12 Number Nd value.

Figure 25 is the flow chart of the method for the down-going synchronous of one embodiment of the invention.Side shown in Figure 25 Method is performed by user equipment, is applied to low-and high-frequency mixed networking system.The method includes：

S110, the user equipment receives the synchronizing information that high frequency base station sends, and the synchronizing information is by same Step radio frames are carried, and the synchronous radio frame includes at least one special subframe, and the special subframe is used to pass Defeated synchronizing signal, wherein, the special subframe includes that DLBP, the DLBP include Nu subinterval, Nd synchronizing signal is transmitted in described each subinterval, and wherein Nu and Nd is the positive integer more than 1.

S120, user equipment is synchronized according to the synchronizing information.

In the embodiment of the present invention, high frequency base station sends synchronizing information in special subframe, and UE is by receiving Synchronizing signal in special subframe, completes synchronous with high frequency base station, is so conducive to UE to quickly access Radio frequency system, saves power consumption when accessing.

Wherein, the value of Nu and Nd is relevant with the frequency that system is used.For example, when the high frequency base station When the frequency for being adopted is for 72GHz, Nd=16, Nu=12；When the frequency that the high frequency base station is adopted For 28GHz when, Nd=12, Nu=8；When the frequency adopted when the high frequency base station is for 14GHz, Nd=8, Nu=6.

Alternatively, as one embodiment, before S110, can also include, in UE reception systems The low frequency signaling that sends of low frequency base station, the low frequency signaling include the frequency that used of high frequency base station and/or The value of Nd.Wherein, low frequency signaling can be RRC signaling.

Wherein, each subinterval of DLBP can include Nd timeslice, the length of each timeslice Degree includes at least two OFDM symbols.OFDM symbols at least two OFDM symbol Number for sending master sync signal, the second OFDM symbol at least two OFDM symbol is used In transmission auxiliary synchronous signals.

Specifically, second OFDM symbol is used to send the particular sequence of the auxiliary synchronous signals.Its In, the particular sequence includes the timeslice that the mark ID of the high frequency base station, the particular sequence are located ID and the particular sequence be located subinterval ID.

It should be noted that may refer to the concrete of aforementioned Fig. 9 and Figure 10 with regard to master sync signal and auxiliary synchronous signals Description, to avoid repeating, repeats no more here.

Wherein, the special subframe can also include RDP and up-downgoing switching guard interval GP, such as Shown in aforementioned Fig. 4 to Fig. 7.Each subinterval may also include and be located at respectively after the Nd timeslice Nd switching guard interval SGP, as shown in aforementioned Fig. 8.

In addition, in the embodiment of the present invention, the synchronous radio frame also includes general subframe, the general son Frame includes the time slot that 8 length is 0.125 millisecond, and the time slot includes Ns OFDM symbol, its In, Ns is positive integer.As one, can be as shown in Figure 2.

Wherein, the value of Ns is relevant with the frequency that system is used.For example, when the high frequency base station is adopted Frequency be 72GHz when, Ns=80；When the frequency adopted when the high frequency base station is for 28GHz, Ns=40；When the frequency adopted when the high frequency base station is for 14GHz, Ns=20.

In the embodiment of the present invention, the cycle of the synchronous radio frame that high frequency base station is used can be M The length of radio frames, wherein, M is positive integer.That is, a synchronous radio is included per M radio frames Frame and M-1 general radio frames.Here, M can be equal to 1.

Alternatively, as one embodiment, Nd synchronizing signal of each subinterval transmission of DLBP can It is transmitted successively using the Nd different wave beam that sends with being high frequency base station.That is, high frequency Base station, with Nu as cycle, is Nd different transmission wave beam in each cycle, sends synchronizing signal.

Correspondingly, in S110, UE can respectively receive described using Nu different reception wave beam Synchronizing signal on Nu subinterval.That is, UE uses Nu different reception wave beam, often It is individual to receive the transmission wave beam that wave beam receives Nd high frequency base station.

In order to solve due to problem caused by low-and high-frequency time delay, as one, in the embodiment of the present invention, On the first special subframe in the synchronizing information, the high frequency base station uses the transmission wave beam of the first order Send the synchronizing signal.On the second special subframe in the synchronizing information, the high frequency base station makes The synchronizing signal is sent with the transmission wave beam of the second order.Wherein, second order is by described One sequentially passes through cyclic shift generation, and the length of the timeslice of the cyclic shift is more than the system Low-and high-frequency time delay.

Specifically, the understanding can be：On the DLBP of the first special subframe, using the first order Send wave beam and send the synchronizing signal；On the DLBP of the second special subframe, using the second order Send wave beam and send the synchronizing signal.Or, the understanding can also be：In the DLBP of the first special subframe Each subinterval on, send the synchronizing signal using the transmission wave beam of the first order；It is special second On each subinterval of the DLBP of subframe, using the transmission wave beam of the second order the synchronizing signal is sent.

Wherein, if each synchronous radio frame includes a special subframe.So, first special subframe For the special subframe in the first synchronous radio frame, second special subframe is in the second synchronous radio frame Special subframe.Wherein, the second synchronous radio frame is adjacent with the first synchronous radio frame next Individual synchronous radio frame.

Wherein, if each synchronous radio frame includes 2N special subframe.So, the described first special son Frame is the 2i special subframe in the 2N special subframe, and second special subframe is the 2N The 2i+1 special subframe in individual special subframe.Wherein, N is positive integer, and i is less than or equal to N Positive integer.

Wherein, if each synchronous radio frame includes 2N+1 special subframe.So, described first is special Subframe is 2i special subframe in 2N+1 special subframe in the first synchronous radio frame or for The 2i+1 special subframe in 2N+1 special subframe in two synchronous radio frames；Described second is special Subframe be 2i+1 special subframe in 2N+1 special subframe in the first synchronous radio frame or Person is the 2i special subframe in 2N+1 special subframe in the second synchronous radio frame.Wherein, The second synchronous radio frame is the next synchronous radio frame adjacent with the first synchronous radio frame, N For positive integer, i is the positive integer less than or equal to N.

For example, the first synchronous radio frame can be the synchronous radio frame 301 in Fig. 3, and second is synchronous Radio frames can be the synchronous radio frame 302 in Fig. 3.

Accordingly for the embodiment, S110 may include：The user equipment is according in the system The low frequency signal that low frequency base station sends determines the original position of sync detection window；The user equipment is used Nu different reception wave beam starts to receive Nu group synchronizing signals respectively from the original position, wherein, Every group of synchronizing signal includes Nd synchronizing signal.

Specifically, the corresponding description of aforementioned Figure 13 to Figure 19 is may refer to regard to the embodiment, to avoid Repeat, repeat no more here.

In the embodiment of the present invention, UE is by the quick down-going synchronous for obtaining radio frequency system of low frequency auxiliary.It is high In the wireless frame structure that frequency base station uses, using different transmission wave beams on two adjacent special subframes Sequentially (cyclic shift), in such manner, it is possible to ensure the send wave for receiving wave beam and high frequency base station for traveling through UE All combinations of beam, so as to ensure synchronous efficiency and quality.

In order to solve due to problem caused by low-and high-frequency time delay, as another example, in the embodiment of the present invention, The special subframe may also include the CS after the DLBP, and the CS transmits K synchronous letter Number, wherein, K is the positive integer less than Nd.Wherein, the Nd synchronizing signal in each subinterval is high Frequency base station sends what wave beam was transmitted successively using Nd.The K synchronizing signal of CS is that high frequency base station makes First K in wave beam is sent with the Nd and sends what wave beam was transmitted successively.That is, CS is pressed Switch transmission wave beam successively to send according to the order of the front K transmission wave beam in first subinterval of DLBP Synchronizing signal.

Or, it is understood that it is that special subframe may also include the CP before the DLBP, institute State CP and transmit K synchronizing signal, wherein, K is the positive integer less than Nd.Wherein, each subinterval Nd synchronizing signal to be high frequency base station send wave beam using Nd is transmitted successively.The K of CP Individual synchronizing signal is that high frequency base station is entered successively using the described Nd rear K transmission wave beam sent in wave beam What row sent.That is, rear K transmission wave beams of the CP according to last subinterval of DLBP Order switch successively transmission wave beam to send synchronizing signal.

Accordingly for the embodiment, S110 can include：The user equipment is according in the system Low frequency base station send low frequency signal determine that the first start bit of the first sync detection window is put；The use Family equipment is put from the first start bit using Nu different reception wave beam and starts to receive respectively Nu groups together Step signal, wherein, every group of synchronizing signal includes Nd synchronizing signal；The user equipment is according to described The low frequency signal and additional receptive time delay that low frequency base station in system sends determines the second sync detection window Second original position；The user equipment is using Nu different reception wave beam from second start bit Put and start to receive Nu group synchronizing signals respectively, wherein, every group of synchronizing signal includes Nd synchronizing signal.

Wherein, second special subframe is first special son after first special subframe Frame.

Wherein, the additional receptive time delay is preset in the user equipment；Or, described adding connects It is that the user equipment is obtained from the low frequency base station that time receiving prolongs.For example, the additional receptive time delay is The user equipment is obtained by the RRC signaling that the low frequency base station sends.

Wherein, the length of the additional receptive time delay is more than the low-and high-frequency time delay of the system, the CS Or the length of the timeslice shared by CP more than or equal to the low-and high-frequency time delay with the additional receptive when Prolong sum.

In the embodiment of the present invention, UE is by the quick down-going synchronous for obtaining radio frequency system of low frequency auxiliary.It is high In the wireless frame structure that frequency base station uses, adds additional on special subframe cyclic suffix (or circulation before Sew) send synchronizing signal additionally to use K to send wave beam.Also, UE utilizes additional receptive time delay The wave beam that receives that ensure that traversal UE is combined with all of wave beam that send of high frequency base station, so as to ensure The efficiency and quality of synchronization.

Figure 26 is the method for the down-going synchronous of another embodiment of the present invention.Method shown in Figure 26 is by height Frequency base station performs, and is applied to low-and high-frequency mixed networking system.The method includes：

S210, the high frequency base station generates synchronizing information, and the synchronizing information is carried by synchronous radio frame, The synchronous radio frame includes at least one special subframe, and the special subframe is used for synchronous signal transmission, Wherein, the special subframe includes that DLBP, the DLBP include Nu subinterval, described per height Nd synchronizing signal of interval transmission, wherein Nu and Nd is positive integer.

S220, the high frequency base station sends the synchronizing information to user equipment.

Wherein, described each subinterval of DLBP includes Nd timeslice, the length of each timeslice Degree includes at least two OFDM symbols.OFDM symbols at least two OFDM symbol Number for sending master sync signal, the second OFDM symbol at least two OFDM symbol is used In transmission auxiliary synchronous signals.

Specifically, second OFDM symbol can be used for sending the specific sequence of the auxiliary synchronous signals Row.Wherein, the particular sequence includes the time that the ID of the high frequency base station, the particular sequence are located The ID in the subinterval that the ID of piece and the particular sequence are located.

Alternatively, as one embodiment, S220 may include：The high frequency base station is different using Nd Transmission wave beam send the Nd synchronizing signal.

In order to solve due to problem caused by low-and high-frequency time delay, as one, in the embodiment of the present invention, S220 May include：On the first special subframe in the synchronizing information, the high frequency base station uses the first order Transmission wave beam send the synchronizing signal；It is described on the second special subframe in the synchronizing information High frequency base station sends the synchronizing signal using the transmission wave beam of the second order.Wherein, second order It is to sequentially pass through cyclic shift by described first to generate, and the length of the timeslice of the cyclic shift is big In the low-and high-frequency time delay of the system.

In the embodiment of the present invention, in the wireless frame structure that high frequency base station uses, two adjacent special subframes On using different transmission wave beams order (cyclic shift), so so that UE is carrying out down-going synchronous When, the wave beam that receives that ensure that traversal UE is combined with all of wave beam that send of high frequency base station, so as to Ensure synchronous efficiency and quality.

In order to solve due to problem caused by low-and high-frequency time delay, as another example, in the embodiment of the present invention, The special subframe also includes being located at the CS after the DLBP, and the CS transmits K synchronizing signal, Wherein, K is the positive integer less than Nd.S220 can include：Sent out using Nd the high frequency base station Wave beam is sent to send the Nd synchronizing signal successively；The high frequency base station uses described Nd transmission wave beam In it is front K send wave beam send the K synchronizing signal successively.

Or, it can be understood as, the high frequency base station is sent using the transmission wave beam of Nd the first order The Nd synchronizing signal, using the front K send wave sent in wave beam of the Nd the first order Beam sends the K synchronizing signal.

Or, it is understood that it is that special subframe may also include the CP before the DLBP, institute State CP and transmit K synchronizing signal, wherein, K is the positive integer less than Nd.Wherein, each subinterval Nd synchronizing signal to be high frequency base station be transmitted using the wave beam that sends of Nd the first order.CP K synchronizing signal be that high frequency base station uses the Nd the first orders rear K sent in wave beam Send what wave beam was transmitted.That is, rear Ks of the CP according to last subinterval of DLBP The individual order for sending wave beam switches successively transmission wave beam to send synchronizing signal.

In the embodiment of the present invention, in the wireless frame structure that high frequency base station uses, additionally increase on special subframe CS (or CP) sends wave beam transmission synchronizing signal additionally to use K.So so that UE When down-going synchronous are carried out, using additional receptive time delay the reception wave beam and high frequency of traversal UE are ensure that All combinations of the transmission wave beam of base station, so as to ensure synchronous efficiency and quality.

Figure 27 is the structured flowchart of the user equipment of one embodiment of the invention.User shown in Figure 27 sets Standby 300 in low-and high-frequency mixed networking system, and user equipment 300 includes receiving unit 310 and processes Unit 320.

Receiving unit 310, for receiving the synchronizing information of high frequency base station transmission, the synchronizing information is by same Step radio frames are carried, and the synchronous radio frame includes at least one special subframe, and the special subframe is used for Synchronous signal transmission, wherein, the special subframe includes that DLBP, the DLBP include Nu sub-district Between, Nd synchronizing signal is transmitted in described each subinterval, and wherein Nu and Nd is the positive integer more than 1.

Processing unit 320, for being synchronized according to the synchronizing information.

Alternatively, as one embodiment, receiving unit 310 is additionally operable to the low frequency base station in reception system The low frequency signaling of transmission, frequency and/or the value of Nd that the low frequency signaling is used including high frequency base station.Its In, low frequency signaling can be RRC signaling.

In addition, in the embodiment of the present invention, the synchronous radio frame may also include general subframe, described general Subframe includes the time slot that 8 length is 0.125 millisecond, and the time slot includes Ns OFDM symbol, Wherein, Ns is positive integer.As one, can be as shown in Figure 2.

Alternatively, as one embodiment, the Nd synchronizing signal can be that the high frequency base station makes With Nd it is different send what wave beam was transmitted.

Alternatively, as another embodiment, receiving unit 310, specifically for：It is different using Nu The wave beam that receives receive synchronizing signal on the Nu subinterval respectively.That is, receiving unit 310 using a Nd synchronizing signal received on one subinterval of wave beam reception.

Alternatively, as another embodiment, on the first special subframe in the synchronizing information, institute Stating high frequency base station uses the transmission wave beam of the first order to send the synchronizing signal.In the synchronizing information The second special subframe on, the high frequency base station sends the synchronous letter using the transmission wave beam of the second order Number.Wherein, second order is to sequentially pass through cyclic shift by described first to generate, and described is followed Low-and high-frequency time delay of the length of the timeslice of ring displacement more than the system.

Correspondingly, receiving unit 310, specifically for：What the low frequency base station in the system sent Low frequency signal determines the original position of sync detection window；Using Nu different reception wave beams from described Original position starts to receive Nu group synchronizing signals respectively, wherein, every group of synchronizing signal includes Nd synchronously Signal.

Alternatively, as another embodiment, the special subframe can also include being located at the DLBP Cyclic suffix CS afterwards, the CS transmits K synchronizing signal, wherein, K is less than Nd just Integer.Wherein, the Nd synchronizing signal in each subinterval is that high frequency base station uses Nd the first order Send what wave beam was transmitted.The K synchronizing signal of CS is that high frequency base station uses the Nd first suitable First K sent in wave beam of sequence sends what wave beam was transmitted.That is, CS is according to DLBP First subinterval it is front K transmission wave beam order switch successively transmission wave beam to send synchronous letter Number.

Or, it is understood that it is that the special subframe can also include being located at before the DLBP CP, the CP transmits K synchronizing signal, wherein, K is the positive integer less than Nd.Wherein, often The Nd synchronizing signal in individual subinterval is that high frequency base station carries out sending out using the transmission wave beam of Nd the first order Send.The K synchronizing signal of CP is in the transmission wave beam that high frequency base station uses the Nd the first order Latter K send wave beam and be transmitted.That is, last sub-district of CP according to DLBP Between it is rear K transmission wave beam order switch successively transmission wave beam to send synchronizing signal.

Correspondingly, receiving unit 310, specifically for：What the low frequency base station in the system sent Low frequency signal determines that the first start bit of the first sync detection window is put；Using Nu different received wave Beam is put from the first start bit and starts to receive Nu group synchronizing signals respectively, wherein, every group of synchronizing signal Including Nd synchronizing signal；The low frequency signal that low frequency base station in the system sends connects with additional Time receiving prolongs the second original position for determining the second sync detection window；Using Nu different reception wave beam Start to receive Nu group synchronizing signals respectively from second original position, wherein, every group of synchronizing signal bag Include Nd synchronizing signal.

It should be noted that in the embodiment of the present invention, receiving unit 310 can be realized by transceiver, processing unit 320 can be realized by processor.As shown in figure 28, user equipment 400 can include processor 410, Transceiver 420 and memorizer 430.Wherein, memorizer 430 can be used for storage reception wave beam etc., also Can be used for storing code that processor 410 is performed etc..Wherein, transceiver 420 can be by receptor reality It is existing.

Each component in user equipment 400 is coupled by bus system 440, wherein total linear system 440 are united in addition to including data/address bus, also including power bus, controlling bus and status signal bus in addition.

The user equipment 400 shown in user equipment 300 or Figure 28 shown in Figure 27 can realize aforementioned side Each process realized by user equipment in method embodiment, to avoid repeating, repeats no more here.

It should be noted that said method embodiment of the present invention can apply in processor, or by processor reality It is existing.Processor is probably a kind of IC chip, the disposal ability with signal.During realization, Each step of said method embodiment can pass through the integrated logic circuit or software of the hardware in processor The instruction of form is completed.Above-mentioned processor can be general processor, digital signal processor (Digital Signal Processor, DSP), special IC (Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field Programmable Gate Array, FPGA) or its His PLD, discrete gate or transistor logic, discrete hardware components.Can realize Or the disclosed each method in the execution embodiment of the present invention, step and logic diagram.General processor can To be microprocessor or the processor can also be any conventional processor etc..With reference to present invention enforcement The step of method disclosed in example, can be embodied directly in hardware decoding processor and perform and complete, or with translating Hardware and software module combination execution in code processor is completed.Software module may be located at random access memory, Flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, depositor Deng in the ripe storage medium in this area.The storage medium is located at memorizer, and processor is read in memorizer Information, the step of complete said method with reference to its hardware.

It is appreciated that the memorizer in the embodiment of the present invention can be volatile memory or non-volatile deposit Reservoir, or may include both volatibility and nonvolatile memory.Wherein, nonvolatile memory can be with It is read only memory (Read-Only Memory, ROM), programmable read only memory (Programmable ROM, PROM), Erasable Programmable Read Only Memory EPROM (Erasable PROM, EPROM), electricity Erasable Programmable Read Only Memory EPROM (Electrically EPROM, EEPROM) or flash memory.Volatibility Memorizer can be random access memory (Random Access Memory, RAM), and it is used as outer Portion's cache.By exemplary but be not restricted explanation, the RAM of many forms can use, for example Static RAM (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), Double data speed synchronous dynamic RAM (Double Data Rate SDRAM, DDR SDRAM), enhancement mode Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronized links dynamic random access memory (Synchlink DRAM, SLDRAM) and direct internal memory are total Line random access memory (Direct Rambus RAM, DR RAM).It should be noted that described herein The memorizer of system and method is intended to including but not limited to these memorizeies with any other suitable type.

Figure 29 is the structured flowchart of the high frequency base station of one embodiment of the invention.High frequency base shown in Figure 29 500 are stood for the high frequency base station in low-and high-frequency mixed networking system, high frequency base station 500 includes signal generating unit 510 With transmitting element 520.

Signal generating unit 510, for generating synchronizing information, the synchronizing information is carried by synchronous radio frame, The synchronous radio frame includes at least one special subframe, and the special subframe is used for synchronous signal transmission, Wherein, the special subframe includes that DLBP, the DLBP include Nu subinterval, described per height Nd synchronizing signal of interval transmission, wherein Nu and Nd is the positive integer more than 1.

Transmitting element 520, for the synchronizing information to be sent to user equipment.

Wherein, the user equipment is in the low-and high-frequency mixed networking system.

Alternatively, as one embodiment, transmitting element 520, specifically for：It is different using Nd Send wave beam and send the Nd synchronizing signal.

Alternatively, as another embodiment, transmitting element 520, specifically for：In the synchronous letter On the first special subframe in breath, using the transmission wave beam of the first order the synchronizing signal is sent；Institute State on the second special subframe in synchronizing information, using the transmission wave beam of the second order the synchronous letter is sent Number.Wherein, second order is to sequentially pass through cyclic shift by described first to generate, and described is followed Low-and high-frequency time delay of the length of the timeslice of ring displacement more than the system.

Alternatively, as another embodiment, the special subframe also includes being located at after the DLBP CS, the CS transmits K synchronizing signal, wherein, K is the positive integer less than Nd.Send single Unit 520, specifically for：The Nd synchronizing signal is sent using the transmission wave beam of Nd the first order； Described K is sent using the front K transmission wave beam sent in wave beam of the Nd the first order synchronously Signal.

It should be noted that in the embodiment of the present invention, transmitting element 520 can be realized by transceiver, signal generating unit 510 can be realized by processor.As shown in figure 30, high frequency base station 600 can include processor 610, Transceiver 620 and memorizer 630.Wherein, memorizer 630 can be used for storage transmission wave beam etc., also Can be used for storing code that processor 610 is performed etc..Wherein, transceiver 620 can be by transmitter reality It is existing.

Each component in high frequency base station 600 is coupled by bus system 640, wherein total linear system 640 are united in addition to including data/address bus, also including power bus, controlling bus and status signal bus in addition.

The high frequency base station 600 shown in high frequency base station 500 or Figure 30 shown in Figure 29 can realize aforementioned side Each process realized by high frequency base station in method embodiment, to avoid repeating, repeats no more here.

It should be noted that said method embodiment of the present invention can apply in processor, or by processor reality It is existing.Processor is probably a kind of IC chip, the disposal ability with signal.During realization, Each step of said method embodiment can pass through the integrated logic circuit or software of the hardware in processor The instruction of form is completed.Above-mentioned processor can be general processor, DSP, ASIC, FPGA or Person other PLDs, discrete gate or transistor logic, discrete hardware components.Can be with Disclosed each method, step and logic diagram in realization or the execution embodiment of the present invention.General procedure Device can be microprocessor or the processor can also be any conventional processor etc..With reference to the present invention The step of method disclosed in embodiment, can be embodied directly in hardware decoding processor and perform and complete, or Completed with the hardware in decoding processor and software module combination execution.Software module may be located at deposits at random Reservoir, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, In the ripe storage medium in this areas such as depositor.The storage medium is located at memorizer, and processor reads and deposits Information in reservoir, the step of complete said method with reference to its hardware.

It is appreciated that the memorizer in the embodiment of the present invention can be volatile memory or non-volatile deposit Reservoir, or may include both volatibility and nonvolatile memory.Wherein, nonvolatile memory can be with It is ROM, PROM, EPROM, EEPROM or flash memory.Volatile memory can be RAM, It is used as External Cache.By exemplary but be not restricted explanation, the RAM of many forms can With such as SRAM, DRAM, SDRAM, DDR SDRAM, ESDRAM, SLDRAM With DR RAM.It should be noted that the memorizer of system and method described herein be intended to including but not limited to this The memorizer of a little and any other suitable type.

Those of ordinary skill in the art are it is to be appreciated that with reference to each of the embodiments described herein description The unit and algorithm steps of example, can be with electronic hardware or the knot of computer software and electronic hardware Close to realize.These functions are performed with hardware or software mode actually, depending on the spy of technical scheme Fixed application and design constraint.Professional and technical personnel can use not Tongfang to each specific application Method is realizing described function, but this realization it is not considered that beyond the scope of this invention.

Those skilled in the art can be understood that, for convenience and simplicity of description, above-mentioned to retouch The specific work process of system, device and the unit stated, may be referred to the correspondence in preceding method embodiment Process, will not be described here.

In several embodiments provided herein, it should be understood that disclosed system, device and Method, can realize by another way.For example, device embodiment described above is only to show Meaning property, for example, the division of the unit, only a kind of division of logic function can when actually realizing To there is other dividing mode, such as multiple units or component can with reference to or be desirably integrated into another System, or some features can ignore, or do not perform.It is another, it is shown or discussed each other Coupling or direct-coupling or communication connection can be INDIRECT COUPLING by some interfaces, device or unit Or communication connection, can be electrical, mechanical or other forms.

It is described as separating component explanation unit can be or may not be it is physically separate, make Can be for the part that unit shows or may not be physical location, you can with positioned at a place, Or can also be distributed on multiple NEs.Can select according to the actual needs part therein or Person's whole unit is realizing the purpose of this embodiment scheme.

In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, Can also be that unit is individually physically present, it is also possible to which two or more units are integrated in a list In unit.

If the function is realized using in the form of SFU software functional unit and as independent production marketing or used When, during a computer read/write memory medium can be stored in.It is of the invention based on such understanding The part or the part of the technical scheme that technical scheme substantially contributes in other words to prior art can To be embodied in the form of software product, the computer software product is stored in a storage medium, Use including some instructions so that computer equipment (can be personal computer, server, or Network equipment etc.) perform all or part of step of each embodiment methods described of the invention.And it is aforesaid Storage medium includes：USB flash disk, portable hard drive, ROM, RAM, magnetic disc or CD etc. are various can be deposited The medium of storage program code.

The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited to In this, any those familiar with the art the invention discloses technical scope in, can be easily Expect change or replacement, all should be included within the scope of the present invention.Therefore, protection of the invention Scope should be defined by scope of the claims.

Claims

1. a kind of method of down-going synchronous, it is characterised in that be applied to low-and high-frequency mixed networking system, wraps Include：

The user equipment is synchronized according to the synchronizing information.

2. method according to claim 1, it is characterised in that described each subinterval includes Nd Individual timeslice, the length of each timeslice includes at least two orthogonal frequency division multiplex OFDM symbols, The first OFDM symbol at least two OFDM symbol is used to send master sync signal, described The second OFDM symbol at least two OFDM symbols is used to send auxiliary synchronous signals.

3. method according to claim 2, it is characterised in that second OFDM symbol is used In the particular sequence for sending the auxiliary synchronous signals,

Wherein, the particular sequence includes mark ID, Yi Jisuo of the timeslice that the particular sequence is located State the ID in the subinterval at particular sequence place.

4. the method according to any one of claims 1 to 3, it is characterised in that

On the second special subframe in the synchronizing information, the high frequency base station sending out using the second order Wave beam is sent to send the synchronizing signal,

Wherein, second order is to sequentially pass through cyclic shift by described first to generate.

5. method according to claim 4, it is characterised in that each synchronous radio frame includes Special subframe；

6. method according to claim 4, it is characterised in that each synchronous radio frame includes 2N Individual special subframe；

7. the method according to any one of claim 4 to 6, it is characterised in that the user equipment The synchronizing information that high frequency base station sends is received, including：

The low frequency signal that low frequency base station of the user equipment in the system sends determines synchronous detecting The original position of window；

The user equipment starts to receive respectively using Nu different reception wave beam from the original position Nu group synchronizing signals, wherein, every group of synchronizing signal includes Nd synchronizing signal.

8. the method according to any one of claim 4 to 7, it is characterised in that the cyclic shift Timeslice length more than the system low-and high-frequency time delay.

9. the method according to any one of claim 1 to 8, it is characterised in that set in the user It is standby to receive before the synchronizing information that high frequency base station sends, also include：

10. the method according to any one of claim 1 to 9, it is characterised in that the special son Frame also includes reserved data interval RDP and up-downgoing switching guard interval GP.

11. methods according to any one of claim 1 to 10, it is characterised in that the high frequency base Stand the synchronous radio frame for being used cycle be M radio frames length, wherein, M is positive integer.

A kind of 12. methods of down-going synchronous, it is characterised in that be applied to low-and high-frequency mixed networking system, Including：

13. methods according to claim 12, it is characterised in that described each subinterval includes Nd timeslice, the length of each timeslice is accorded with including at least two orthogonal frequency division multiplex OFDMs Number, the first OFDM symbol at least two OFDM symbol is used to send master sync signal, The second OFDM symbol at least two OFDM symbol is used to send auxiliary synchronous signals.

14. methods according to any one of claim 12 to 13, it is characterised in that the high frequency Base station sends the synchronizing information to the user equipment, including：

15. methods according to claim 14, it is characterised in that each synchronous radio frame includes one Individual special subframe；

16. methods according to claim 14, it is characterised in that each synchronous radio frame includes 2N special subframe；

17. methods according to any one of claim 14 to 16, it is characterised in that the circulation Low-and high-frequency time delay of the length of the timeslice of displacement more than the system.

18. a kind of user equipmenies, it is characterised in that in low-and high-frequency mixed networking system, including：

Receiving unit, for receiving the synchronizing information of high frequency base station transmission, the synchronizing information is by synchronous nothing Line frame is carried, and the synchronous radio frame includes at least one special subframe, and the special subframe is used to transmit Synchronizing signal, wherein, the special subframe includes down-going synchronous and wave beam training interval DLBP, described DLBP includes Nu subinterval, and Nd synchronizing signal is transmitted in described each subinterval, wherein Nu with Nd is the positive integer more than 1；

19. user equipmenies according to claim 18, it is characterised in that described each subinterval bag Nd timeslice is included, the length of each timeslice includes at least two orthogonal frequency division multiplex OFDMs Symbol, the first OFDM symbol at least two OFDM symbol is used to send master sync signal, The second OFDM symbol at least two OFDM symbol is used to send auxiliary synchronous signals.

20. user equipmenies according to claim 18 or 19, it is characterised in that

21. user equipmenies according to claim 20, it is characterised in that each synchronous radio frame bag Include a special subframe；

22. user equipmenies according to claim 20, it is characterised in that each synchronous radio frame bag Include 2N special subframe；

23. user equipmenies according to any one of claim 20 to 22, it is characterised in that described Receiving unit, specifically for：

24. user equipmenies according to any one of claim 20 to 23, the cyclic shift when Between piece length more than the system low-and high-frequency time delay.

25. a kind of high frequency base stations, it is characterised in that include：

Signal generating unit, for generating synchronizing information, the synchronizing information is carried by synchronous radio frame, described Synchronous radio frame includes at least one special subframe, and the special subframe is used for synchronous signal transmission, wherein, The special subframe includes that down-going synchronous and wave beam training interval DLBP, the DLBP are sub including Nu Nd synchronizing signal is transmitted in interval, described each subinterval, and wherein Nu and Nd is just whole more than 1 Number；

Transmitting element, for the synchronizing information to be sent to the user equipment.

26. high frequency base stations according to claim 25, it is characterised in that described each subinterval bag Nd timeslice is included, the length of each timeslice includes at least two orthogonal frequency division multiplex OFDMs Symbol, the first OFDM symbol at least two OFDM symbol is used to send master sync signal, The second OFDM symbol at least two OFDM symbol is used to send auxiliary synchronous signals.

The 27. high frequency base stations according to claim 25 or 26, it is characterised in that the transmission list Unit, specifically for：

On the second special subframe in the synchronizing information, using the transmission wave beam of the second order institute is sent State synchronizing signal,

28. high frequency base stations according to claim 27, it is characterised in that each synchronous radio frame bag Include a special subframe；

29. high frequency base stations according to claim 27, it is characterised in that each synchronous radio frame bag Include 2N special subframe；

The 30. high frequency base stations according to any one of claim 27 to 29, it is characterised in that described Low-and high-frequency time delay of the length of the timeslice of cyclic shift more than the system.