CN103686746A - Method, device and base station for device discovery signal transmission - Google Patents

Method, device and base station for device discovery signal transmission Download PDF

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Publication number
CN103686746A
CN103686746A CN201210326440.7A CN201210326440A CN103686746A CN 103686746 A CN103686746 A CN 103686746A CN 201210326440 A CN201210326440 A CN 201210326440A CN 103686746 A CN103686746 A CN 103686746A
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dds
equipment
transmission opportunity
dds transmission
base station
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CN201210326440.7A
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冯淑兰
周晗
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201210326440.7A priority Critical patent/CN103686746A/en
Publication of CN103686746A publication Critical patent/CN103686746A/en
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Abstract

The embodiment of the invention provides a method, device and base station for device discovery signal transmission. The method comprises the following steps: determining the DDS (Device Discovery Signal) transmission cycle and the DDS frequency-domain resource of the base station, wherein the DDS transmission cycle is divided into DDS transmission chances in time; selecting one unoccupied DDS transmission chance among the DDS transmission chances to be used as a current DDS transmission chance of a current device; sending a current DDS of the current device through the current DDS transmission chance. According to the embodiment of the invention, the device sending the DDS transmits the DDS through selecting one unoccupied DDS transmission chance in the DDS transmission cycle; one DDS transmission chance can only carry one DDS; therefore, the problem that one device is unable to search other simultaneously uploaded devices caused by that a plurality of devices simultaneously transmit DDSs is avoided.

Description

Method, equipment and the base station of the transmission of device discovery signal
Technical field
The embodiment of the present invention relates to the communications field, and more specifically, relates to method, equipment and the base station of device discovery signal transmission.
Background technology
In traditional cellular system, terminal is linked into cellular network, between terminal, be through communication initiator's service equipment, to send paging signal to cellular network by communication initiator, by the service equipment of communication target side, send paging signal and to communication target side, realize the both sides' of communication discovery and foundation.This discovery mode can be found any terminal in cellular network coverage.Another kind of device discovery form is the direct device discovery between terminal and terminal, a terminal is found the other side by the wireless signal of another terminal transmission of search, direct discovery between this terminal and terminal, be applicable to find the wireless discovery that directly can reach the terminal in communication distance, relatively be suitable for short-range communication requirement, for example, find the friend in communication range.
Method for discovering equipment between existing terminal and terminal is, system bandwidth is divided into a plurality of subcarrier/subbands, and each terminal takies the device discovery signal (DDS, Device Discovery Signal) of a subcarrier/subband transmission oneself.Therefore, terminal cannot find to share with oneself the other-end of same DDS time.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus for device discovery, by the device discovery signal (DDS of the terminal in Yi Ge community, Device Discovery Signal) quadrature has in time avoided a plurality of terminals to send the problem that terminal that DDS causes cannot find to share with oneself other-end of same DDS time simultaneously.
First aspect, provides the method for configuring transmission resource of a kind of DDS, and the method comprises: determine that the partial fixing frequency domain resource in the frequency domain resource of Serving cell is DDS frequency domain resource, this DDS frequency domain resource is for transmitting the DDS of equipment in this Serving cell; Determine the DDS transmission cycle of this Serving cell; In this DDS transmission cycle, this DDS frequency domain resource is divided into a plurality of DDS transmission opportunitys in time, in DDS transmission cycle, each of the plurality of DDS transmission opportunity is for carrying the DDS of an equipment,, any two quadratures in time of the plurality of DDS transmission opportunity.
First aspect, a kind of transmission method of device discovery signal has been proposed, the method comprises: device discovery signal DDS transmission cycle and the DDS frequency domain resource of determining base station, wherein, this DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in this DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time-domain, only takies this DDS frequency domain resource on frequency domain; Determine that DDS transmission opportunity idle in the plurality of DDS transmission opportunity is as the current DDS transmission opportunity of current device; In this current DDS transmission opportunity, send the current DDS of this current device.
In the possible implementation of the first, in conjunction with first aspect, determine that DDS transmission opportunity idle in the plurality of DDS transmission opportunity specifically can be implemented as the current DDS transmission opportunity of current device: determine that the idle DDS transmission opportunity of this base station assigns is as this current DDS transmission opportunity; Or obtain idle DDS transmission opportunity as this current DDS transmission opportunity by scanning one or more these DDS transmission cycles; Or in this DDS transmission cycle sending according to this base station, the occupied information of DDS transmission opportunity is determined this current DDS transmission opportunity.
In the possible implementation of the second, in conjunction with the possible implementation of the first of first aspect or first aspect, this current DDS carries the leading Preamble sequence for the random access base station of this current device, and in this current DDS, this Preamble sequence is for this current DDS of other device discoveries.
Second aspect, a kind of searching method of device discovery signal has been proposed, the method comprises: determine the device discovery signal DDS transmission cycle of search cell and the DDS frequency domain resource of search cell, wherein, this DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in this DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time-domain, on frequency domain, only take this DDS frequency domain resource, this search cell is second Serving cell at equipment place and/or the neighbor cell of this Serving cell, in the plurality of DDS transmission opportunity, search for DDS, wherein, this DDS is that the first equipment sends, according to this DDS, realize the discovery to this first equipment.
In the possible implementation of the first, in conjunction with second aspect, the method also comprises: search for DDS in the plurality of DDS transmission opportunity before, determine that this search cell is for the leading Preamble sequence of this DDS, this Preamble sequence is for when this DDS carries this Preamble sequence, and the second equipment determines according to the signal receiving in the DDS transmission opportunity of search and the correlation peak of this Preamble sequence whether the signal receiving in the DDS transmission opportunity of this search is this DDS.
In the possible implementation of the second, in conjunction with the possible implementation of the first of second aspect or second aspect, specific implementation is: this search cell is determined according to the service conditions of this second equipment by this second equipment; Or You Gai Serving cell, this search cell is determined.
In the third possible implementation, the possible implementation of the second in conjunction with the possible implementation of the first of second aspect or second aspect or second aspect, in the plurality of DDS transmission opportunity, searching for DDS specific implementation is: search for this DDS to the DDS transmission opportunity before maximum DDS transmission opportunity the zero hour from this DDS transmission cycle in the plurality of DDS transmission opportunity, this maximum DDS transmission opportunity refers in this DDS transmission cycle, last the occupied DDS transmission opportunity starting the zero hour from this DDS transmission cycle.
In the 4th kind of possible implementation, in conjunction with the possible implementation of the second of the possible implementation of the first of second aspect or second aspect or second aspect, in the plurality of DDS transmission opportunity, search for DDS specific implementation and be: according to the situation that takies of DDS transmission opportunity, in the plurality of DDS transmission opportunity, in occupied DDS transmission opportunity, search for this DDS.
In the 5th kind of possible implementation, in conjunction with the possible implementation of the first of second aspect, in the plurality of DDS transmission opportunity, search for DDS specific implementation and be: the correlation peak that obtains the signal receiving in this Preamble sequence and DDS transmission opportunity in search; When this correlation peak is more than or equal to predetermined threshold value, determine in the DDS transmission opportunity of this search and have this DDS.
In the 6th kind of possible implementation, in conjunction with the possible implementation of the first of second aspect or second aspect to any possible implementation in the 5th kind of possible implementation of second aspect, according to this DDS, realize the discovery to this first equipment, specific implementation is: if a DDS carries the id information of this first equipment, a DDS is carried out to demodulating and decoding to obtain id information discovery to this first equipment with realization of this first equipment.
In the 7th kind of possible implementation, in conjunction with the possible implementation of the first of second aspect or second aspect to any possible implementation in the 5th kind of possible implementation of second aspect, according to this DDS, realize the discovery to this first equipment, specific implementation is: if this DDS does not carry the id information of this first equipment, send the numbering of the DDS transmission opportunity that a DDS takies to this Serving cell; Receive the id information of this first equipment that the numbering of the DDS transmission opportunity that this Serving cell takies according to this DDS sends to realize the discovery to this first equipment.
In the 8th kind of possible implementation, in conjunction with the possible implementation of the first of second aspect or second aspect to any possible implementation in the 5th kind of possible implementation of second aspect, according to this DDS, realize the discovery to this first equipment, specific implementation is: if this DDS does not carry the id information of this first equipment, if and Shi Gai neighbor cell, this search cell, to this neighbor cell, send the numbering of the DDS transmission opportunity that this DDS takies; Receive this neighbor cell according to id information discovery to this first equipment with realization of this first equipment of the numbering transmission of this DDS transmission opportunity, wherein, the id information of this first equipment is that this neighbor cell directly sends to this second equipment, or the id information of this first equipment is that this neighbor cell sends to this second equipment by this Serving cell.
The third aspect, has proposed a kind of method for configuring transmission resource of device discovery signal, and the method comprises: determine the device discovery signal DDS frequency domain resource of base station, this DDS frequency domain resource is for transmitting the DDS of the equipment of this base station of access; Determine the DDS transmission cycle of this base station; This DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, wherein, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in this DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, only takies this DDS frequency domain resource in frequency domain resource; To the equipment of this base station of access, send the information of the plurality of DDS transmission opportunity.
In the possible implementation of the first, in conjunction with the third aspect, determine that the DDS transmission cycle specific implementation of this base station is: determine that the time cycle of making an appointment is this DDS transmission cycle; Or determine this DDS transmission cycle according to the quantity of the access device of this base station; Or determine this DDS transmission cycle according to the quantity of the access device of this base station and time cycle of making an appointment.
In the possible implementation of the second, in conjunction with the possible implementation of the first of the third aspect, determine that the DDS transmission cycle specific implementation of this base station is: determine that DDS transmission cycle is 2 nms, wherein, 2 nfor being more than or equal to the smallest positive integral of M, M is the equipment sum of base station access.
In the third possible implementation, in conjunction with the possible implementation of the first of the third aspect, determine that the DDS transmission cycle specific implementation of this base station is: determine that DDS transmission cycle is max (2 n, X) ms, wherein, described 2 nfor being more than or equal to the smallest positive integral of M, M is the equipment sum of base station access, X be one predetermined time periodic quantity.
In the 4th kind of possible implementation, in conjunction with the possible implementation of the first of the third aspect or the third aspect, to any possible implementation in the third possible implementation of the third aspect, specific implementation is: the plurality of DDS transmission opportunity is continuous in time; Or the plurality of DDS transmission opportunity is discontinuous in time.
In the 5th kind of possible implementation, in conjunction with the possible implementation of the first of the third aspect or the third aspect, to any possible implementation in the 4th kind of possible implementation of the third aspect, the method also comprises: the situation that takies that sends the DDS transmission opportunity in this DDS transmission cycle to the equipment of this base station of access.
In the 6th kind of possible implementation, in conjunction with the possible implementation of the first of the third aspect or the third aspect, to any possible implementation in the 5th kind of possible implementation of the third aspect, the method also comprises:
Equipment to this base station of access sends the information of this DDS transmission cycle and/or the information of this DDS frequency domain resource.
In the 7th kind of possible implementation, in conjunction with the possible implementation of the first of the third aspect or the third aspect to any possible implementation in the 6th kind of possible implementation of the third aspect, the method also comprises: determine that this base station is for the leading Preamble sequence of DDS, this Preamble sequence is for search equipment search DDS.
Fourth aspect, a kind of equipment has been proposed, this equipment comprises: determining unit, determine device discovery signal DDS transmission cycle and the DDS frequency domain resource of base station, wherein, this DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in this DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time-domain, only takies this DDS frequency domain resource on frequency domain; This determining unit is also for determining that the idle DDS transmission opportunity of the plurality of DDS transmission opportunity is as the current DDS transmission opportunity of current device; Transmitting element, for sending the current DDS of this current device in this current DDS transmission opportunity.
In the possible implementation of the first, in conjunction with fourth aspect, this determining unit specifically for the idle DDS transmission opportunity of determining this base station assigns as this current DDS transmission opportunity; Or this determining unit is specifically for obtaining idle DDS transmission opportunity as this current DDS transmission opportunity by scanning one or more these DDS transmission cycles; Or this determining unit is determined this current DDS transmission opportunity specifically for the occupied information of DDS transmission opportunity in this DDS transmission cycle sending according to this base station.
In the possible implementation of the second, in conjunction with the possible implementation of the first of fourth aspect or fourth aspect, specific implementation is: this current DDS carries the leading Preamble sequence for the random access base station of this current device, and in this current DDS, this Preamble sequence is for this current DDS of other device discoveries.
The 5th aspect, a kind of equipment has been proposed, this equipment comprises: determining unit, for determining the device discovery signal DDS transmission cycle of search cell and the DDS frequency domain resource of search cell, wherein, this DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in this DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time-domain, on frequency domain, only take this DDS frequency domain resource, this search cell is the Serving cell at this equipment place and/or the neighbor cell of this Serving cell, search unit, for search for DDS in the plurality of DDS transmission opportunity, wherein, a DDS is that the first equipment sends, find unit, for realizing the discovery to this first equipment according to this DDS.
In the possible implementation of the first, in conjunction with the 5th aspect, this determining unit is also for determining that this search cell is for the leading Preamble sequence of this DDS, this Preamble sequence is for when this DDS carries this Preamble sequence, and this equipment determines according to the signal receiving in the DDS transmission opportunity of search and the correlation peak of this Preamble sequence whether the signal receiving in the DDS transmission opportunity of this search is this DDS.
In the possible implementation of the second, in conjunction with the possible implementation of the first of the 5th aspect or the 5th aspect, specific implementation is: this search cell is determined according to the service conditions of this equipment by this equipment; Or You Gai Serving cell, this search cell is determined.
In the third possible implementation, the possible implementation of the second in conjunction with the possible implementation of the first of the 5th aspect or the 5th aspect or the 5th aspect, this search unit is specifically for searching for a DDS to the DDS transmission opportunity before maximum DDS transmission opportunity the zero hour from this DDS transmission cycle in the plurality of DDS transmission opportunity, this maximum DDS transmission opportunity refers in this DDS transmission cycle, last the occupied DDS transmission opportunity starting the zero hour from this DDS transmission cycle.
In the 4th kind of possible implementation, in conjunction with the possible implementation of the second of the possible implementation of the first of the 5th aspect or the 5th aspect or the 5th aspect, this search unit specifically for searching for a DDS in the plurality of DDS transmission opportunity in occupied DDS transmission opportunity according to the situation that takies of DDS transmission opportunity.
In the 5th kind of possible implementation, in conjunction with the possible implementation of the first of the 5th aspect extremely, this search unit also comprises: obtain subelement, for obtaining the correlation peak of the signal receiving in this Preamble sequence and DDS transmission opportunity in search; Determine subelement, for determining in the DDS transmission opportunity of this search, have this DDS when this correlation peak is more than or equal to predetermined threshold value.
In the 6th kind of possible implementation, the possible implementation of the first in conjunction with the 5th aspect or the 5th aspect, if this DDS carries the id information of this first equipment, this discovery unit is specifically for carrying out demodulating and decoding to obtain id information discovery to this first equipment with realization of this first equipment to this DDS.
In the 7th kind of possible implementation, the possible implementation of the first in conjunction with the 5th aspect or the 5th aspect, if this DDS does not carry the ID of the equipment that sends this DDS: this discovery unit is specifically for the numbering of the DDS transmission opportunity that sends this DDS to this Serving cell and take; This discovery unit concrete also for the id information that receives this first equipment that the numbering of the DDS transmission opportunity that this Serving cell takies according to this DDS sends to realize the discovery to this first equipment.
In the 8th kind of possible implementation, the possible implementation of the first in conjunction with the 5th aspect or the 5th aspect, if this DDS does not carry the ID of the equipment that sends this DDS,: if this finds that unit is specifically for Shi Gai neighbor cell, this search cell, to this neighbor cell, send the numbering of the DDS transmission opportunity that this DDS takies; This discovery unit is concrete also for receiving this neighbor cell according to id information discovery to this first equipment with realization of this first equipment of the numbering transmission of this DDS transmission opportunity, wherein, the id information of this first equipment is that this neighbor cell directly sends to this equipment, or the id information of this first equipment is that this neighbor cell sends to this equipment by this Serving cell.
The 6th aspect, has proposed a kind of base station, and this base station comprises: determining unit, and for determining the device discovery signal DDS frequency domain resource of this base station, this DDS frequency domain resource is for transmitting the DDS of the equipment of this base station of access; This determining unit is also for determining the DDS transmission cycle of this base station; Division unit, for this DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in this DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, only takies this DDS frequency domain resource in frequency domain resource; Transmitting element, sends the information of the plurality of DDS transmission opportunity for the equipment to this base station of access.
In the possible implementation of the first, in conjunction with the 6th aspect, specific implementation is: this determining unit is specifically for determining that the time cycle of making an appointment is this DDS transmission cycle; Or this determining unit is specifically for determining this DDS transmission cycle according to the quantity of the access device of this base station; Or this determining unit is specifically for determining this DDS transmission cycle according to the quantity of the access device of this base station and the time cycle of making an appointment.
In the possible implementation of the second, in conjunction with the possible implementation of the first of the 6th aspect or the 6th aspect, this determining unit is specifically for determining that this DDS transmission cycle is 2 nms, wherein, 2 nfor being more than or equal to the smallest positive integral of M, the equipment sum that M is access base station.
In the third possible implementation, in conjunction with the possible implementation of the first of the 6th aspect or the 6th aspect, determining unit is specifically for determining that DDS transmission cycle is max (2 n, X) ms, wherein, 2 nfor being more than or equal to the smallest positive integral of M, equipment that M is access base station sum, X be one predetermined time periodic quantity.
In the 4th kind of possible implementation, in conjunction with any possible implementation in the third possible implementation of possible implementation to the six aspects of the first of the 6th aspect or the 6th aspect, specific implementation is: the plurality of DDS transmission opportunity is continuous in time; Or the plurality of DDS transmission opportunity is discontinuous in time.
In the 5th kind of possible implementation, in conjunction with any possible implementation in the 4th kind of possible implementation of possible implementation to the six aspects of the first of the 6th aspect or the 6th aspect, the concrete situation that takies that also sends the DDS transmission opportunity in this DDS transmission cycle for the equipment to this base station of access of this transmitting element.
In the 6th kind of possible implementation, in conjunction with any possible implementation in the 5th kind of possible implementation of possible implementation to the six aspects of the first of the 6th aspect or the 6th aspect, transmitting element specifically also sends the information of this DDS transmission cycle and/or the information of this DDS frequency domain resource for the equipment to this base station of access.
In the 7th kind of possible implementation, in conjunction with any possible implementation in the 6th kind of possible implementation of possible implementation to the six aspects of the first of the 6th aspect or the 6th aspect, this determining unit is concrete also for determining that this base station is for the leading Preamble sequence of DDS, and this Preamble sequence is for search equipment search DDS.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the flow chart of embodiment of the present invention configuration DDS transfer resource.
Fig. 2 is the schematic diagram of embodiment of the present invention DDS on time-domain and frequency domain.
Fig. 3 a is that DDS frequency domain resource is at the position view of the transmission bandwidth of base station.
Fig. 3 b is that DDS frequency domain resource is at the another location of the transmission bandwidth of base station schematic diagram.
Fig. 3 c is that DDS frequency domain resource is at the another location of the transmission bandwidth of base station schematic diagram.
Fig. 3 d is that DDS frequency domain resource is at the another location of the transmission bandwidth of base station schematic diagram.
Fig. 4 is the flow chart that the embodiment of the present invention sends DDS.
Fig. 5 is that the embodiment of the present invention is according to the flow chart of DDS search equipment.
Fig. 6 is the schematic block diagram of embodiment of the present invention base station.
Fig. 7 is the schematic block diagram that the embodiment of the present invention sends the equipment of DDS.
Fig. 8 is the schematic block diagram of embodiment of the present invention search equipment.
Fig. 9 is another schematic block diagram of embodiment of the present invention base station.
Figure 10 is another schematic block diagram that the embodiment of the present invention sends the equipment of DDS.
Figure 11 is another schematic block diagram of embodiment of the present invention search equipment.
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 clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Should understand, the technical scheme of the embodiment of the present invention can be applied to various communication systems, for example: global system for mobile telecommunications (GSM, Global System of Mobile communication) system, code division multiple access (CDMA, Code Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access) system, GPRS (GPRS, General Packet Radio Service), Long Term Evolution (LTE, Long Term Evolution) system, LTE Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplex) system, LTE time division duplex (TDD, Time Division Duplex), universal mobile telecommunications system (UMTS, Universal Mobile Telecommunication System) etc.
Terminal (Terminal), can be referred to as subscriber equipment (UE, User Equipment), user, mobile terminal (Mobile Subscriber) etc., can be through wireless access network (for example, RAN, Radio Access Network) communicate with one or more core net, it can be mobile terminal, as mobile phone (or being called " honeycomb " phone) with there is the computer of mobile terminal, for example, can be portable, pocket, hand-hold type, built-in computer or vehicle-mounted mobile device, they and wireless access network exchange language and/or data.
Fig. 1 is the flow chart of embodiment of the present invention configuration device discovery signals (DDS, Device Discovery Signal) transfer resource.The method of Fig. 1 is carried out by base station.
101, determine the DDS frequency domain resource of base station.Wherein, this DDS frequency domain resource is for transmitting the DDS of the equipment of this base station of access.
102, determine the DDS transmission cycle of this base station.
103, this DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time.Wherein, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, only takies this DDS frequency domain resource in frequency domain resource.An equipment is selected identical DDS transmission opportunity in a plurality of continuous DDS transmission cycles.
104, to the equipment of this base station of access, send the information of the plurality of DDS transmission opportunity.
In the embodiment of the present invention, by being DDS configuration frequency domain resource and transmission cycle, and transmission cycle is divided into the transmission opportunity of upper quadrature of a plurality of time, and a transmission opportunity can only be carried a DDS, thereby avoided a plurality of equipment to send the problem that equipment that DDS causes cannot find to share with oneself other equipment of same DDS time simultaneously.
Fig. 2 is the schematic diagram of embodiment of the present invention DDS on time-domain and frequency domain.As shown in Figure 2, in a DDS transmission cycle, the transmission of DDS mainly concentrated in a period of time of the zero hour in cycle, and namely the device discovery signal of Fig. 2 transmits effective time; The idling-resource of DDS mainly concentrates on the end period in cycle, namely the device discovery signal idling-resource of Fig. 2.As can be seen from Figure 2, a device discovery signal is divided into a plurality of DDS transmission opportunitys that time span is identical in time.
In step 101, determine the DDS frequency domain resource of base station.
Alternatively, can determine that the partial fixing frequency domain resource in the frequency domain resource of base station is DDS frequency domain resource.
Further, can be using the frequency domain resource of continuous 12 subcarrier sizes in the frequency domain resource of base station as DDS frequency domain resource, or using the frequency domain resource of continuous 72 subcarrier sizes in the frequency domain resource of base station as DDS frequency domain resource.
Alternatively, can determine that the frequency domain resource of making an appointment in the frequency domain resource of base station is DDS frequency domain resource.Further; the frequency domain resource of making an appointment; it can be the resource of parton carrier wave that is positioned at the transmission bandwidth upper sideband of base station; as shown in Figure 3 a; also can be the resource of parton carrier wave that is positioned at the transmission bandwidth lower sideband of base station; as described in Fig. 3 b; it can also be the frequency domain resource that is positioned at the parton carrier wave in the middle of the transmission bandwidth of base station; as shown in Figure 3 c; or be close to the resource of the parton carrier wave in the boundary belt of frequency domain resource bandwidth of base station; as shown in Figure 3 d, the parton carrier resource or in other any channel widths.
Alternatively, can, after determining the DDS frequency domain resource of base station, to the equipment that accesses this base station, send this DDS frequency domain resource.Further, can, by the mode of broadcast, to the equipment of this base station of access, send the information of this DDS frequency domain resource.
In step 102, determine the DDS transmission cycle of this base station.
Alternatively, can determine the DDS transmission cycle that time cycle of making an appointment is this base station.Further, the time cycle of making an appointment can be fixed value, for example 4096ms or 1024ms.
Alternatively, can determine this DDS transmission cycle according to the quantity of the access device of this base station.DDS transmission cycle is dynamically determined according to the number of devices of access base station, reduces DDS transmission cycle, thereby can accelerate device discovery in the time of can lacking at the number of devices of access base station; When the number of devices of access base station is many, increase DDS transmission cycle, thereby avoid DDS transmission collision.Further, can determine that this DDS transmission cycle is 2 nms, wherein, these are 2 years old nfor being greater than the smallest positive integral of M, the equipment sum that M is this base station access.For example, the equipment of access base station is 255,2 nin should select n=8, this DDS transmission cycle is 2 8ms, i.e. 256ms.
Alternatively, can comprehensive above-mentioned two schemes, determine this DDS transmission cycle, in other words, can determine this DDS transmission cycle according to the quantity of the access device of this base station and the time cycle of making an appointment.Further, can determine that this DDS transmission cycle is max (2 n, X) ms, wherein, these are 2 years old nfor being more than or equal to the smallest positive integral of M, the equipment sum that M is this base station access, this X is a predetermined value, for setting the shortest DDS transmission cycle of DDS.When 2 nwhile being more than or equal to cycle predetermined time X, select 2 nas this DDS transmission cycle; When 2 nwhile being less than cycle predetermined time X, select X as this DDS transmission cycle.DDS transmission cycle is according to the quantity of access base station and combine search time of meeting DDS setting, and when the number of devices of access base station is few, not needing increases the number of times that sends DDS transmission, and being conducive to reduction equipment increases owing to repeatedly retransmitting the power consumption that DDS causes; Meanwhile, when the number of devices of access base station is many, increase DDS transmission cycle, thereby avoid DDS transmission collision.Further, a kind of preferred scheme, above-mentioned time cycle X can be 4096 or 1024.
Alternatively, can, after determining the DDS transmission cycle of this base station, to the equipment of this base station of access, send the information of this DDS transmission cycle.
Further, can, by the mode of broadcast, to the equipment of this base station of access, send the information of this DDS transmission cycle.
In step 103, this DDS transmission cycle can be divided in time to a plurality of DDS transmission opportunitys.
A DDS transmission opportunity is only carried a DDS, in a DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, in frequency domain resource, only take this DDS frequency domain resource, this just guarantees that DDS transmission opportunity and equipment (or DDS) are relation one to one between the two, and an equipment (DDS) has a DDS transmission opportunity in a DDS transmission cycle.Meanwhile, any two the DDS transmission opportunitys between a plurality of DDS transmission opportunitys of a base station are quadrature in time, and in other words, any two DDS transmission opportunitys are not occured simultaneously in time.That is to say, a plurality of DDS in base station can not clash in time-domain resource He in frequency domain resource.
Alternatively, when in time DDS transmission cycle is cut apart, time-domain resource that can be using the time-domain resource of 1ms as a DDS transmission opportunity.For example, a DDS transmission opportunity, can take the resource of 1ms in the time, and frequency domain resource takies the resource of 12 subcarriers.
Alternatively, a plurality of DDS transmission opportunitys can be continuous in time, and what DDS was used is the continuous time-domain resource in base station.
Alternatively, a plurality of DDS transmission opportunitys can be discontinuous in time, and what DDS was used is the discontinuous time-domain resource in base station.For example, in LTE, can be every several subframes, there is the resource of 12 subcarrier sizes of a subframe for transmitting DDS, every 10 subframes for example, have the resource of 12 subcarrier sizes of a subframe for transmitting DDS, adjacent two DDS transmission opportunity interval 10ms.
Alternatively, also can send to the equipment of this base station of access (distribution) information that takies of DDS transmission opportunity.
Further, sending DDS transmission opportunity take (distribution) information to the equipment that accesses this base station, can be the information of maximum DDS transmission opportunity that sends to the equipment of this base station of access.Maximum DDS transmission opportunity refers in a DDS transmission cycle, last the occupied DDS transmission opportunity starting the zero hour from DDS transmission cycle.
Alternatively, can also determine in base station that, for the leading Preamble sequence of DDS, this Preamble sequence can be used for searching for DDS.As a kind of execution mode, can determine that the Preamble sequence of making an appointment is as this Preamble sequence.For example, first Preamble sequence of the Physical Random Access Channel PRACH resource of the base station of making an appointment is this Preamble sequence, or first Preamble sequence that A gathers or B gathers of agreement PRACH resource is as this Preamble sequence.The subset of the Preamble set of the PRACH that further, this Preamble sequence can be base station.As another kind of execution mode, can, after base station is identified for the Preamble sequence of DDS, to the equipment that accesses this base station, send this Preamble sequence.
Fig. 4 is the flow chart that the embodiment of the present invention sends DDS.The method of Fig. 4 is carried out by the first equipment.The first equipment of the present invention all refers to send the equipment of DDS, and the second equipment all refers to search equipment.
401, determine DDS transmission cycle and the DDS frequency domain resource of base station.Wherein, this DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, only takies this DDS frequency domain resource in frequency domain resource.
402, determine that DDS transmission opportunity idle in the plurality of DDS transmission opportunity is as the current DDS transmission opportunity of current device.
403, in this current DDS transmission opportunity, send the current DDS of this current device.
In the embodiment of the present invention, send the equipment of DDS by select to transmit DDS in an idle DDS transmission opportunity in DDS transmission cycle, a DDS transmission opportunity is only carried a DDS, thereby has avoided a plurality of equipment to transmit the problem that equipment that DDS causes cannot be searched for other equipment of simultaneously uploading with it simultaneously.
In the embodiment of the present invention, an equipment can select identical DDS transmission opportunity as the DDS transmission opportunity of this equipment in a plurality of continuous DDS transmission cycles.Generally, the order of the DDS transmission opportunity of an equipment in DDS transmission cycle can not change.In each DDS transmission cycle, this equipment all can be sent in the DDS transmission opportunity of the equipment of distributing to and transmit DDS, so that other equipment search this equipment.
Alternatively, as an embodiment, the method also comprises:
404, exit base station and discharge current DDS transmission opportunity.
If current device exits base station, discharge the current DDS transmission opportunity that this equipment occupies.The DDS transmission opportunity dischargeing, can be by the hold facility of other access base stations.
401, determine DDS transmission cycle and the DDS frequency domain resource of base station.
Alternatively, can determine the DDS transmission cycle that time cycle of making an appointment with base station is base station.
The information of the DDS transmission cycle that can send according to base station alternatively, is determined the DDS transmission cycle of base station.Further, base station can adopt the mode of broadcast to send the information of DDS transmission cycle.
Alternatively, can determine the DDS frequency domain resource that the frequency domain resource of making an appointment with base station is base station.Further; the frequency domain resource of making an appointment; it can be the resource of parton carrier wave that is positioned at the transmission bandwidth upper sideband of base station; as shown in Figure 3 a; also can be the resource of parton carrier wave that is positioned at the transmission bandwidth lower sideband of base station; as described in Fig. 3 b; it can also be the frequency domain resource that is positioned at the parton carrier wave in the middle of the transmission bandwidth of base station; as shown in Figure 3 c; or be close to the resource of the parton carrier wave in the boundary belt of frequency domain resource bandwidth of base station; as shown in Figure 3 d, the parton carrier resource or in other any channel widths.
Alternatively, can receive the information of the DDS frequency domain resource of base station transmission.Further, base station can adopt the mode of broadcast to send the information of DDS frequency domain resource.Further, if DDS frequency domain resource (frequency domain resource that DDS is shared) is continuous in time, only need to receive the DDS frequency domain resource of base station broadcast; If DDS frequency domain resource is discontinuous in time, need to receive shared frequency domain resource information and the time-domain resource information of DDS of base station broadcast.The information of time-domain resource can be the information of a plurality of DDS transmission opportunitys.
Alternatively, DDS frequency domain resource can be the frequency domain resource of continuous 12 subcarrier sizes or the frequency domain resource of continuous 72 subcarrier sizes.
402, determine that DDS transmission opportunity idle in the plurality of DDS transmission opportunity is as the current DDS transmission opportunity of current device.
Alternatively, the idle DDS transmission opportunity that can determine this base station assigns is as current DDS transmission opportunity.
Further, first the idle DDS transmission opportunity starting from DDS transmission cycle that can determine base station assigns is as current DDS transmission opportunity.In other words, the idle DDS transmission opportunity of this base station assigns is first the idle DDS transmission opportunity starting from DDS transmission cycle.
For the power consumption of minimizing equipment search, when the DDS of all devices selects DDS transmission opportunity, should follow as much as possible a principle, as much as possible zero hour chosen distance device discovery signal period nearest DDS transmission opportunity.First idle DDS transmission opportunity that base station selected DDS transmission cycle starts is devices allocation DDS transmission opportunity, just can guarantee that DDS concentrates in one section of DDS transmission opportunity that DDS transmission cycle starts as much as possible, i.e. DDS transmission opportunity in device discovery signal transmission effective time as shown in Figure 2.
Alternatively, can obtain idle DDS transmission opportunity as current DDS transmission opportunity by scanning one or more these DDS transmission cycles.The mode of the DDS transmission opportunity of this definite equipment, can follow the principle of " as much as possible zero hour chosen distance device discovery signal period nearest DDS transmission opportunity " equally.Can obtain first idle DDS transmission opportunity as current DDS transmission opportunity by scanning one or more these DDS transmission cycles.
In the DDS transmission cycle that can send according to this base station alternatively,, the occupied information of DDS transmission opportunity is determined this current DDS transmission opportunity.Definite principle can be followed the principle of " as much as possible zero hour chosen distance device discovery signal period nearest DDS transmission opportunity " equally, the occupied information of DDS transmission opportunity in the DDS transmission cycle that can send according to this base station, first idle DDS transmission opportunity that the chosen distance device discovery signal period starts is this current DDS transmission opportunity.
Further, the occupied information of the DDS transmission opportunity that base station sends, can be the numbering of last occupied DDS transmission opportunity of starting from DDS transmission cycle; Or the numbering of first the idle DDS transmission opportunity starting from DDS transmission cycle; Or the occupied information of the interior all DDS transmission opportunitys of DDS transmission cycle.
For example, the DDS transmission cycle of supposing base station is 4096ms, comprising 4096 DDS transmission opportunitys.Suppose that base station accessed 300 equipment altogether, these 300 hold facilities from first DDS transmission opportunity, start until all DDS transmission opportunitys of the 300th DDS transmission opportunity, base station can be by last occupied DDS, 300, broadcast is gone out; Or base station can be by first the continuous idle DDS transmission opportunity starting from DDS transmission cycle, 301, broadcast is gone out.If the DDS transmission opportunity of these 300 hold facilities discontinuous (may be because the mobility of equipment causes), supposes that last occupied DDS transmission opportunity is 403, base station can be by last occupied DDS, 403, and broadcast is gone out; Or base station can be by first the continuous idle DDS transmission opportunity starting from DDS transmission cycle, 404, broadcast is gone out; Or the occupied information of 4096 DDS transmission opportunitys is broadcasted away in base station, for example by 1bit information, represent that whether a DDS transmission opportunity is occupied, by 4096bits information, the occupied information of DDS transmission opportunity is broadcasted away.
Further, current device can be the equipment that initially accesses this base station.
Further, when current device initially accesses this base station, can determine that first the idle DDS transmission opportunity that approaches this DDS transmission cycle zero hour is most as current DDS transmission opportunity.
Further, an equipment can be selected identical DDS transmission opportunity in a plurality of continuous DDS transmission cycles.
Alternatively, the method also comprises step: determine that base station is for first leading (Preamble) sequence of DDS.
Further, Physical Random Access Channel (the PRACH that the one Preamble sequence is this base station, the subset of Preamble set PhysicalRandom Access Channel), in other words, this Preamble sequence can be a Preamble sequence or a plurality of Preamble sequence in PRACH resource.
Alternatively, can determine that the Preamble sequence of making an appointment is as a Preamble sequence.For example, first Preamble sequence of the PRACH resource of the base station of making an appointment is a Preamble sequence, or first Preamble sequence that A gathers or B gathers of agreement PRACH resource is as a Preamble sequence.
The Preamble sequence for DDS that can send according to base station alternatively, is determined a Preamble sequence.Further, the mode that base station sends can be broadcast transmission.Further, a Preamble sequence in PRACH resource or a plurality of Preamble sequence can be broadcasted for device discovery in base station.
Step 403, sends the current DDS of this current device in this current DDS transmission opportunity.
Further, in current DDS, portability is for the Preamble sequence of the random access base station of current device, and in current DDS, this Preamble sequence is for the current DDS of other device discoveries.Because Preamble sequence entrained in DDS is to have good auto-correlation and the sequence of their cross correlation, as PN sequence, ZC sequence etc., search equipment can generate a sequence identical with Preamble sequence, then by obtaining the correlation peak of this sequence and signal in DDS transmission opportunity, judges whether DDS of this signal.
Further, current DDS can also carry following at least one: sign (ID, the Identity) information of current device, the transmission power information of current DDS, the Timing Advance of current DDS (TA, Timing Advance) information.
Fig. 5 is that the embodiment of the present invention is according to the flow chart of DDS search equipment.The method of Fig. 5 is carried out by the second equipment, and the second equipment is search equipment.
501, determine the DDS transmission cycle of search cell and the DDS frequency domain resource of search cell.Wherein, this DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, only takies this DDS frequency domain resource in frequency domain resource.This search cell is second Serving cell at equipment place and/or the neighbor cell of this Serving cell.
502, in the plurality of DDS transmission opportunity, search for DDS.Wherein, this DDS is that the first equipment sends.
503, according to this DDS, realize the discovery to the first equipment.
In the embodiment of the present invention, by searching for DDS in the DDS transmission opportunity beyond the shared DDS transmission opportunity of the second equipment in a plurality of DDS transmission opportunitys in DDS transmission cycle, and a transmission opportunity can only be carried a DDS, thereby avoided a plurality of equipment to transmit the problem that equipment that DDS causes cannot be searched for other equipment of simultaneously uploading with it simultaneously.
In step 501, determine DDS transmission cycle and the DDS frequency domain resource of search cell.
Alternatively, the DDS transmission cycle of search cell is that Serving cell sends.
Alternatively, as an embodiment, when this search cell is the Serving cell of the second equipment, the DDS transmission cycle of this search cell can be the DDS transmission cycle of this Serving cell of this Serving cell transmission.The DDS frequency domain resource of this Serving cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, as another embodiment, when this search cell is the neighbor cell of Serving cell of the second equipment, the DDS transmission cycle of this search cell can be the DDS transmission cycle of this neighbor cell of sending from this Serving cell.The DDS frequency domain resource of the neighbor cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, the DDS transmission cycle of search cell is that neighbor cell sends.Alternatively, as another embodiment, when this search cell is the neighbor cell of Serving cell of the second equipment, the DDS transmission cycle of this search cell can be the DDS transmission cycle of this neighbor cell of sending from this neighbor cell.The DDS frequency domain resource of the neighbor cell that further, this neighbor cell sends can be by broadcast transmission.
Alternatively, as another embodiment, the DDS transmission cycle of this search cell can be the DDS transmission cycle of making an appointment.
Alternatively, the DDS frequency domain resource of search cell is that Serving cell sends.
Alternatively, as an embodiment, when this search cell is the Serving cell of the second equipment, the DDS frequency domain resource of this search cell can be the DDS frequency domain resource of this Serving cell of this Serving cell transmission.The DDS frequency domain resource of this Serving cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, as another embodiment, when this search cell is the neighbor cell of Serving cell of the second equipment, the DDS frequency domain resource of this search cell can be the DDS frequency domain resource of this neighbor cell of sending from this Serving cell.The DDS frequency domain resource of the neighbor cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, the DDS frequency domain resource of search cell is that neighbor cell sends.Alternatively, as an embodiment, when this search cell is the neighbor cell of Serving cell of the second equipment, the DDS frequency domain resource of this search cell can be the DDS frequency domain resource of this neighbor cell of sending from this neighbor cell.The DDS frequency domain resource of the neighbor cell that further, this neighbor cell sends can be by broadcast transmission.
Alternatively, as another embodiment, the DDS frequency domain resource of this search cell can be the DDS frequency domain resource of making an appointment.
Alternatively, search for DDS in the plurality of DDS transmission opportunity before, also can comprise the following steps: determine that search cell is for the Preamble sequence of DDS.This Preamble sequence is for when DDS carries this Preamble sequence, and the second equipment can determine whether the signal receiving in the DDS transmission opportunity of search is described DDS according to the correlation peak of the signal receiving in the DDS transmission opportunity of search and this Preamble sequence.
Alternatively, search cell is that Serving cell sends for the Preamble sequence of DDS.
Alternatively, as an embodiment, when this search cell is the Serving cell of the second equipment, this search cell can be the Preamble sequence of this Serving cell of this Serving cell transmission for the Preamble sequence of DDS.The DDS frequency domain resource of this Serving cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, as another embodiment, when this search cell is the neighbor cell of Serving cell of the second equipment, this search cell can be the Preamble sequence of this neighbor cell of sending from this Serving cell for the Preamble sequence of DDS.The DDS frequency domain resource of the neighbor cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, search cell is that neighbor cell sends for the Preamble sequence of DDS.Alternatively, as an embodiment, when this search cell is the neighbor cell of Serving cell of the second equipment, this search cell can be the Preamble sequence of this neighbor cell of sending from this neighbor cell for the Preamble sequence of DDS.The DDS frequency domain resource of the neighbor cell that further, this neighbor cell sends can be by broadcast transmission.
Alternatively, as another embodiment, search cell can be the Preamble sequence of making an appointment for the Preamble sequence of DDS.
Obviously, DDS transmission cycle, DDS frequency domain resource and Preamble sequence can determine or make an appointment according to the message receiving, and for any definite mode in DDS transmission cycle, DDS frequency domain resource and Preamble sequence, is not subject to other impact.
Alternatively, search cell is Serving cell, neighbor cell or Serving cell and neighbor cell, can determine according to the service conditions of the second equipment, or be determined by Serving cell.
Alternatively, the list of neighbor cell, can be specified or be determined by the second equipment by Serving cell.
In step 502, in the plurality of DDS transmission opportunity, search for DDS.
Alternatively, can to the DDS transmission opportunity before maximum DDS transmission opportunity, search for DDS in the zero hour from this DDS transmission cycle.This maximum DDS transmission opportunity refers to last the occupied DDS transmission opportunity starting the zero hour from this DDS transmission cycle.Obviously, all DDS certainly (comprised maximum DDS transmission opportunity) and send before maximum DDS transmission opportunity, the second equipment is this part the time search DDS in DDS transmission cycle only, can avoid doing invalid search in the time after maximum DDS transmission opportunity, save power consumption.
Further, when search cell is the Serving cell of the second equipment, can obtain from Serving cell maximum DDS transmission opportunity.
Or, when search cell is the neighbor cell of the second equipment, can obtain from Serving cell the maximum DDS transmission opportunity of neighbor cell.
Or, when search cell is the neighbor cell of the second equipment, can obtain from neighbor cell the maximum DDS transmission opportunity of neighbor cell.
Further, if cannot know maximum DDS transmission opportunity, maximum DDS transmission opportunity equals the total DDS transmission opportunity number in transmission cycle.
Alternatively, the second equipment can have radio-frequency channel and/or the Baseband Channel identical with the transmission bandwidth of DDS, when carrying out device discovery, uses this passage can reduce power consumption.
Alternatively, as an embodiment, when the DDS sending carries Preamble sequence, can determine that the signal receiving is DDS or noise according to the correlation peak of Preamble sequence and the signal receiving in the DDS transmission opportunity of search.A kind of possible implementation of searching for DDS in described a plurality of DDS transmission opportunitys, can be implemented as: obtain search cell for the correlation peak of the signal that receives in the Preamble sequence of DDS and DDS transmission opportunity in search; When this correlation peak is more than or equal to predetermined threshold value, determine in the DDS transmission opportunity of this search and have DDS, otherwise, think that the DDS transmission opportunity of this search does not exist DDS.Further, a kind of search cell that obtains is for the mode of the correlation peak of the signal that receives in the Preamble sequence of DDS and DDS transmission opportunity in search, specifically can be implemented as: generate with search cell for the identical Preamble sequence of the Preamble sequence of DDS, calculate the correlation peak of the signal receiving in a Preamble sequence and DDS transmission opportunity searching for.
In step 503, according to this DDS, realize the discovery to the first equipment.
When the second equipment determines that while effective DDS being detected in certain DDS transmission opportunity, this just illustrates that this DDS transmission opportunity must have a first corresponding equipment, just can find the first corresponding equipment according to this DDS.
Alternatively, as an embodiment, the second equipment is determined the mode that effective DDS detected in certain DDS transmission opportunity, can be that the second equipment detects effective Preamble sequence in certain DDS transmission opportunity.
Alternatively, as an embodiment.When this DDS carries the id information of the first equipment, a DDS is carried out to demodulating and decoding to obtain the id information of the first equipment, to realize the discovery to described the first equipment.
Alternatively, as another embodiment, when this DDS does not carry the id information of the first equipment, the numbering of the DDS transmission opportunity taking to Serving cell transmission DDS, the id information of the first equipment that the numbering of the DDS transmission opportunity that reception Serving cell takies according to DDS sends is to realize the discovery to described the first equipment.Alternatively, as a kind of execution mode, the id information of the first equipment that the numbering of the DDS transmission opportunity that Serving cell takies according to DDS sends, the id information (when search cell is Serving cell) of the first equipment that can be the numbering of DDS transmission opportunity that takies according to DDS of Serving cell and the DDS transmission opportunity of Serving cell send with the corresponding relation of the equipment of transmission DDS, or the id information (when search cell is neighbor cell) of the first equipment of sending of the corresponding relation of the numbering of DDS transmission opportunity that takies according to DDS of Serving cell and the DDS transmission opportunity of neighbor cell and the equipment of transmission DDS.
Alternatively, as another embodiment, when this DDS does not carry the id information of the first equipment, and when search cell is neighbor cell, the numbering of the DDS transmission opportunity taking to neighbor cell transmission DDS, the id information of the first equipment that the numbering of the DDS transmission opportunity that reception of neighboring cell takies according to DDS sends is to realize the discovery to described the first equipment.Alternatively, as a kind of execution mode, the id information of the first equipment that the id information of the first equipment that the numbering of the DDS transmission opportunity that neighbor cell takies according to DDS sends can be the numbering of DDS transmission opportunity that takies according to DDS of neighbor cell and the DDS transmission opportunity of neighbor cell to be sent with the corresponding relation of the equipment of transmission DDS.
Fig. 6 is the schematic block diagram of embodiment of the present invention base station.The base station 600 of Fig. 6 can comprise determining unit 601 and division unit 602.
Determining unit 601 can be determined the DDS frequency domain resource of base station.Wherein, this DDS frequency domain resource is for transmitting the DDS of the equipment of this base station of access.
Determining unit 601 also can be determined the DDS transmission cycle of this base station.
Division unit 602 can be divided into this DDS transmission cycle a plurality of DDS transmission opportunitys in time.Wherein, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, only takies this DDS frequency domain resource in frequency domain resource.An equipment is selected identical DDS transmission opportunity in a plurality of continuous DDS transmission cycles.
Transmitting element 603, can be used for to the information of the plurality of DDS transmission opportunity of transmission of this base station of access.
In the embodiment of the present invention, base station is by being DDS configuration transfer resource and transmission cycle, and transmission cycle is divided into the transmission opportunity of upper quadrature of a plurality of time, and a transmission opportunity can only be carried a DDS, thereby avoided a plurality of equipment to send the problem that equipment that DDS causes cannot find to share with oneself other equipment of same DDS time simultaneously.
Determining unit 601 can be determined the DDS frequency domain resource of base station.
Alternatively, determining unit 601 can determine that the partial fixing frequency domain resource in the frequency domain resource of base station is DDS frequency domain resource.
Further, determining unit 601 can be using the frequency domain resource of continuous 12 subcarrier sizes in the frequency domain resource of base station as DDS frequency domain resource, or using the frequency domain resource of continuous 72 subcarrier sizes in the frequency domain resource of base station as DDS frequency domain resource.
Alternatively, determining unit 601 can determine that the frequency domain resource of making an appointment in the frequency domain resource of base station is DDS frequency domain resource.Further; the frequency domain resource of making an appointment; it can be the resource of parton carrier wave that is positioned at the transmission bandwidth upper sideband of base station; as shown in Figure 3 a; also can be the resource of parton carrier wave that is positioned at the transmission bandwidth lower sideband of base station; as described in Fig. 3 b; it can also be the frequency domain resource that is positioned at the parton carrier wave in the middle of the transmission bandwidth of base station; as shown in Figure 3 c; or be close to the resource of the parton carrier wave in the boundary belt of frequency domain resource bandwidth of base station; as shown in Figure 3 d, the parton carrier resource or in other any channel widths.
Alternatively, transmitting element 603 also can be after determining the DDS frequency domain resource of base station, to the equipment of base station, sends this DDS frequency domain resource.Further, can, by the mode of broadcast, to the equipment of base station, send the information of DDS frequency domain resource.
Determining unit 601 also can be determined the DDS transmission cycle of this base station.
Alternatively, determining unit 601 can be determined the DDS transmission cycle that time cycle of making an appointment is this base station.Further, the time cycle of making an appointment can be fixed value, for example 4096ms or 1024ms.
Alternatively, determining unit 601 can be determined this DDS transmission cycle according to the quantity of the access device of this base station.DDS transmission cycle is dynamically determined according to the number of devices of access base station, can when the number of devices that accesses community is few, reduce DDS transmission cycle, thereby can accelerate device discovery; When the number of devices that accesses community is many, increase DDS transmission cycle, thereby avoid DDS transmission collision.Further, can determine that this DDS transmission cycle is 2 nms, wherein, these are 2 years old nfor being greater than the smallest positive integral of M, the equipment sum that M is this base station access.For example, the equipment of access base station is 255,2 nin should select n=8, this DDS transmission cycle is 2 8ms, i.e. 256ms.
Alternatively, determining unit 601 can comprehensive above-mentioned two schemes, determines this DDS transmission cycle, and in other words, determining unit 601 can be determined this DDS transmission cycle according to the quantity of the access device of this base station and the time cycle of making an appointment.Further, determining unit 601 can determine that this DDS transmission cycle is max (2 n, X) ms, wherein, these are 2 years old nfor being more than or equal to the smallest positive integral of M, the equipment sum that M is this base station access, this X is a predetermined value, for setting the shortest DDS transmission cycle of DDS.When 2 nwhile being more than or equal to cycle predetermined time X, select 2 nas this DDS transmission cycle; When 2 nwhile being less than cycle predetermined time X, select X as this DDS transmission cycle.DDS transmission cycle is according to the quantity of access base station and combine search time of meeting DDS setting, and when number of devices in access community is few, not needing increases the number of times that sends DDS transmission, and being conducive to reduction equipment increases owing to repeatedly retransmitting the power consumption that DDS causes; Meanwhile, when the number of devices that accesses community is many, increase DDS transmission cycle, thereby avoid DDS transmission collision.Further, above-mentioned time cycle X can be 4096 or 1024.
Alternatively, transmitting element 603 can, after determining the DDS transmission cycle of this base station, send the information of this DDS transmission cycle to the equipment of access base station.
Further, transmitting element 603 can, by the mode of broadcast, send the information of this DDS transmission cycle to the equipment of access base station.
Alternatively, determining unit 601 can also determine in community that, for the leading Preamble sequence of DDS, this Preamble sequence can be used for searching for DDS.As a kind of execution mode, determining unit 601 can determine that the Preamble sequence of making an appointment is as this Preamble sequence.For example, first Preamble sequence of the Physical Random Access Channel PRACH resource of the community of making an appointment is this Preamble sequence, or first Preamble sequence that A gathers or B gathers of agreement PRACH resource is as this Preamble sequence.The subset of the Preamble set of the PRACH that further, this Preamble sequence can be community.As another kind of execution mode, can be after determining unit 601 be identified for the Preamble sequence of DDS, transmitting element 603 sends this Preamble sequence to the equipment of access base station.
Division unit 602, can be divided into this DDS transmission cycle a plurality of DDS transmission opportunitys in time.
A DDS transmission opportunity is only carried a DDS, in a DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, in frequency domain resource, only take this DDS frequency domain resource, this just guarantees that DDS transmission opportunity and equipment (or DDS) are relation one to one between the two, and an equipment (DDS) has a DDS transmission opportunity in a DDS transmission cycle.Meanwhile, any two the DDS transmission opportunitys between a plurality of DDS transmission opportunitys of a base station are quadrature in time, and in other words, any two DDS transmission opportunitys are not occured simultaneously in time.That is to say, a plurality of DDS in base station can not clash in time-domain resource He in frequency domain resource.
Alternatively, when division unit 602 is cut apart DDS transmission cycle in time, time-domain resource that can be using the time-domain resource of 1ms as a DDS transmission opportunity.For example, a DDS transmission opportunity, can take the resource of 1ms in the time, and frequency domain resource takies the resource of 12 subcarriers.
Alternatively, a plurality of DDS transmission opportunitys can be continuous in time, and what DDS was used is the continuous time-domain resource in base station.
Alternatively, a plurality of DDS transmission opportunitys can be discontinuous in time, and what DDS was used is the discontinuous time-domain resource in base station.For example, in LTE, can be every several subframes, there is the resource of 12 subcarrier sizes of a subframe for transmitting DDS, every 10 subframes for example, have the resource of 12 subcarrier sizes of a subframe for transmitting DDS, adjacent two DDS transmission opportunity interval 10ms.
Alternatively, transmitting element 603 also can send to the equipment of this base station of access (distribution) information that takies of DDS transmission opportunity.
Further, sending DDS transmission opportunity take (distribution) information to the equipment that accesses this base station, can be the information of maximum DDS transmission opportunity that sends to the equipment of this base station of access.Maximum DDS transmission opportunity refers in a DDS transmission cycle, last the occupied DDS transmission opportunity starting the zero hour from DDS transmission cycle.Equipment transmission DDS transmission opportunity to this base station of access takies (distribution) information, can be also the maximum DDS transmission opportunity information of first idle DDS transmission opportunity afterwards.Equipment transmission DDS transmission opportunity to this base station of access takies (distribution) information, can also be the occupied information of all DDS transmission opportunitys in DDS transmission cycle.
Fig. 7 is the schematic block diagram that the embodiment of the present invention sends the equipment of DDS.The equipment 700 of Fig. 7 can comprise determining unit 701 and transmitting element 702.
Determining unit 701 can be determined DDS transmission cycle and the DDS frequency domain resource of base station.Wherein, this DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in DDS transmission cycle, the DDS of equipment 700 only takies a DDS transmission opportunity in time, only takies this DDS frequency domain resource in frequency domain resource.
Determining unit 701 also can determine that DDS transmission opportunity idle in the plurality of DDS transmission opportunity is as the current DDS transmission opportunity of equipment 700.
Transmitting element 702 can send in this current DDS transmission opportunity the current DDS of this equipment 700.
In the embodiment of the present invention, equipment 700 by selecting to transmit DDS in an idle DDS transmission opportunity in DDS transmission cycle, a DDS transmission opportunity is only carried a DDS, thereby has avoided a plurality of equipment to transmit the problem that equipment that DDS causes cannot be searched for other equipment of simultaneously uploading with it simultaneously.
In the embodiment of the present invention, an equipment can select identical DDS transmission opportunity as the DDS transmission opportunity of this equipment in a plurality of continuous DDS transmission cycles.Generally, the order of the DDS transmission opportunity of an equipment in DDS transmission cycle can not change.In each DDS transmission cycle, this equipment all can be sent in the DDS transmission opportunity of the equipment of distributing to and transmit DDS, so that other equipment search this equipment.
Alternatively, as an embodiment, equipment 700 also can comprise releasing unit 703, is used in and exits base station and discharge current DDS transmission opportunity.
When equipment 700 equipment exit base station, discharge the current DDS transmission opportunity that this equipment occupies.The transmission opportunity dischargeing, can be by the hold facility of other access base stations.
Determining unit 701 can be determined DDS transmission cycle and the DDS frequency domain resource of base station.
Alternatively, determining unit 701 can be determined the DDS transmission cycle that time cycle of making an appointment with base station is base station.
The information of the DDS transmission cycle that alternatively, determining unit 701 can send according to base station is determined the DDS transmission cycle of base station.Further, base station can adopt the mode of broadcast to send the information of DDS transmission cycle.
Alternatively, determining unit 701 can be determined the DDS frequency domain resource that the frequency domain resource of making an appointment with base station is base station.Further; the frequency domain resource of making an appointment; it can be the resource of parton carrier wave that is positioned at the transmission bandwidth upper sideband of base station; as shown in Figure 3 a; also can be the resource of parton carrier wave that is positioned at the transmission bandwidth lower sideband of base station; as described in Fig. 3 b; it can also be the frequency domain resource that is positioned at the parton carrier wave in the middle of the transmission bandwidth of base station; as shown in Figure 3 c; or be close to the resource of the parton carrier wave in the boundary belt of frequency domain resource bandwidth of base station; as shown in Figure 3 d, the parton carrier resource or in other any channel widths.
Alternatively, equipment 700 also comprises receiving element 704, can receive the information of the DDS frequency domain resource (frequency domain resource that DDS is shared) of base station transmission.Further, the information of DDS frequency domain resource can be that base station can adopt the mode of broadcast to send.Further, if a plurality of DDS transmission opportunity is continuous in time, receiving element 704 only needs to receive the DDS frequency domain resource that base station sends; If a plurality of DDS transmission opportunitys are discontinuous in time, receiving element 704 need to receive shared frequency domain resource and the time-domain resource of DDS that base station sends.The information of time-domain resource can be the information of a plurality of DDS transmission opportunitys.
Alternatively, DDS frequency domain resource can be the frequency domain resource of continuous 12 subcarrier sizes or the frequency domain resource of continuous 72 subcarrier sizes.
Determining unit 701 also can determine that DDS transmission opportunity idle in the plurality of DDS transmission opportunity is as the current DDS transmission opportunity of equipment 700.
Alternatively, the idle DDS transmission opportunity that determining unit 701 can be determined this base station assigns is as current DDS transmission opportunity.
Further, first idle DDS transmission opportunity starting from DDS transmission cycle that determining unit 701 can be determined base station assigns is as current DDS transmission opportunity.In other words, the idle DDS transmission opportunity of this base station assigns is first the idle DDS transmission opportunity starting from DDS transmission cycle.
For the power consumption of minimizing equipment search, when the DDS of all devices selects DDS transmission opportunity, should follow as much as possible a principle, as much as possible zero hour chosen distance device discovery signal period nearest DDS transmission opportunity.First idle DDS transmission opportunity that base station selected DDS transmission cycle starts is devices allocation DDS transmission opportunity, just can guarantee that DDS concentrates in one section of DDS transmission opportunity that DDS transmission cycle starts as much as possible, i.e. DDS transmission opportunity in device discovery signal transmission effective time as shown in Figure 2.
Alternatively, determining unit 701 can be obtained idle DDS transmission opportunity as current DDS transmission opportunity by scanning one or more these DDS transmission cycles.The mode of the DDS transmission opportunity of this definite equipment, can follow the principle of " as much as possible zero hour chosen distance device discovery signal period nearest DDS transmission opportunity " equally.Be that determining unit 701 can be obtained first idle DDS transmission opportunity as current DDS transmission opportunity by scanning one or more these DDS transmission cycles.
Alternatively, in the DDS transmission cycle that determining unit 701 can send according to this base station, the occupied information of DDS transmission opportunity is determined this current DDS transmission opportunity.Definite principle can be followed the principle of " as much as possible zero hour chosen distance device discovery signal period nearest DDS transmission opportunity " equally, be that determining unit 701 can be according to the occupied information of DDS transmission opportunity in the DDS transmission cycle of this base station transmission, first idle DDS transmission opportunity that the chosen distance device discovery signal period starts is this current DDS transmission opportunity.
Further, the occupied information of the DDS transmission opportunity that base station sends, can be the numbering of last occupied DDS transmission opportunity of starting from DDS transmission cycle; Or the numbering of first the idle DDS transmission opportunity starting from DDS transmission cycle; Or the occupied information of the interior all DDS transmission opportunitys of DDS transmission cycle.
For example, the DDS transmission cycle of supposing base station is 4096ms, comprising 4096 DDS transmission opportunitys.Suppose that base station (Serving cell) accessed 300 equipment altogether, these 300 hold facilities from first DDS transmission opportunity, start until all DDS transmission opportunitys of the 300th DDS transmission opportunity, base station can be by last occupied DDS, and 300, broadcast is gone out; Or base station can be by first the continuous idle DDS transmission opportunity starting from DDS transmission cycle, 301, broadcast is gone out.If the DDS transmission opportunity of these 300 hold facilities discontinuous (may be because the mobility of equipment causes), supposes that last occupied DDS transmission opportunity is 403, base station can be by last occupied DDS, 403, and broadcast is gone out; Or base station can be by first the continuous idle DDS transmission opportunity starting from DDS transmission cycle, 404, broadcast is gone out; Or the occupied information of 4096 DDS transmission opportunitys is broadcasted away in base station, for example by 1bit information, represent that whether a DDS transmission opportunity is occupied, by 4096bits information, the occupied information of DDS transmission opportunity is broadcasted away.
Further, equipment 700 can be the equipment that initially accesses this base station (Serving cell).
Further, when equipment 700 this base station of initial access (Serving cell), can determine that first the idle DDS transmission opportunity that approaches this DDS transmission cycle zero hour is most as current DDS transmission opportunity.
Further, an equipment can be selected identical DDS transmission opportunity in a plurality of continuous DDS transmission cycles.
Alternatively, determining unit 701 also can determine that base station is used for first leading (Preamble) sequence of DDS.
Further, Physical Random Access Channel (the PRACH that this Preamble sequence is this base station, the subset of Preamble set PhysicalRandom Access Channel), in other words, this Preamble sequence can be a Preamble sequence or a plurality of Preamble sequence in PRACH resource.
Alternatively, determining unit 701 can determine that the Preamble sequence of making an appointment is as a Preamble sequence.For example, first Preamble sequence of the PRACH resource of the base station of making an appointment is a Preamble sequence, or first Preamble sequence that A gathers or B gathers of agreement PRACH resource is as a Preamble sequence.
Alternatively, the Preamble sequence for DDS that determining unit 701 can send according to base station is determined a Preamble sequence.Further, the mode that base station sends can be broadcast transmission.Further, a Preamble sequence in PRACH resource or a plurality of Preamble sequence can be broadcasted for device discovery in base station.
Transmitting element 702 can send in this current DDS transmission opportunity the current DDS of this equipment 700.
Further, in current DDS, portability is for a Preamble sequence of the random access base station of current device, and in current DDS, a Preamble sequence is for the current DDS of other device discoveries.Because Preamble sequence entrained in DDS is to have good auto-correlation and the sequence of their cross correlation, as PN sequence, ZC sequence etc., search equipment can generate a sequence identical with Preamble sequence, then by obtaining the correlation peak of this sequence and signal in DDS transmission opportunity, judges whether DDS of this signal.
Further, current DDS can also carry following at least one: the Timing Advance of the id information of equipment 700, the transmission power information of current DDS, current DDS (TA, Timing Advance) information.
Fig. 8 is the schematic block diagram of embodiment of the present invention search equipment.The equipment 800 of Fig. 8 can comprise determining unit 801, search unit 802 and discovery unit 803.
Determining unit 801, can determine the DDS transmission cycle of search cell and the DDS frequency domain resource of search cell.Wherein, this DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, only takies this DDS frequency domain resource in frequency domain resource.This search cell is the Serving cell at equipment 800 places and/or the neighbor cell of this Serving cell.
Search unit 802 can be searched for DDS in the plurality of DDS transmission opportunity.Wherein, this DDS is that the first equipment sends.
Find unit 803, can realize the discovery to the first equipment according to this DDS.
In the embodiment of the present invention, equipment 800 is by searching for DDS in the DDS transmission opportunity beyond the shared DDS transmission opportunity of equipment 800 in a plurality of DDS transmission opportunitys in DDS transmission cycle, and a transmission opportunity can only be carried a DDS, thereby avoided a plurality of equipment to transmit the problem that equipment that DDS causes cannot be searched for other equipment of simultaneously uploading with it simultaneously.
Determining unit 801 can be determined DDS transmission cycle and the DDS frequency domain resource of search cell.
Alternatively, the DDS transmission cycle of search cell is that Serving cell sends.
Alternatively, as an embodiment, when this search cell is the Serving cell of equipment 800, the DDS transmission cycle of this search cell can be the DDS transmission cycle of this Serving cell of this Serving cell transmission.The DDS frequency domain resource of this Serving cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, as another embodiment, when this search cell is the neighbor cell of Serving cell of equipment 800, the DDS transmission cycle of this search cell can be the DDS transmission cycle of this neighbor cell of sending from this Serving cell.The DDS frequency domain resource of the neighbor cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, the DDS transmission cycle of search cell is that neighbor cell sends.Alternatively, as another embodiment, when this search cell is the neighbor cell of Serving cell of equipment 800, the DDS transmission cycle of this search cell can be the DDS transmission cycle of this neighbor cell of sending from this neighbor cell.The DDS frequency domain resource of the neighbor cell that further, this neighbor cell sends can be by broadcast transmission.
Alternatively, as another embodiment, the DDS transmission cycle of this search cell can be the DDS transmission cycle of making an appointment.
Alternatively, the DDS frequency domain resource of search cell is that Serving cell sends.
Alternatively, as an embodiment, when this search cell is the Serving cell of equipment 800, the DDS frequency domain resource of this search cell can be the DDS frequency domain resource of this Serving cell of this Serving cell transmission.The DDS frequency domain resource of this Serving cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, as another embodiment, when this search cell is the neighbor cell of Serving cell of equipment 800, the DDS frequency domain resource of this search cell can be the DDS frequency domain resource of this neighbor cell of sending from this Serving cell.The DDS frequency domain resource of the neighbor cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, the DDS frequency domain resource of search cell is that neighbor cell sends.Alternatively, as an embodiment, when this search cell is the neighbor cell of Serving cell of equipment 800, the DDS frequency domain resource of this search cell can be the DDS frequency domain resource of this neighbor cell of sending from this neighbor cell.The DDS frequency domain resource of the neighbor cell that further, this neighbor cell sends can be by broadcast transmission.
Alternatively, as another embodiment, the DDS frequency domain resource of this search cell can be the DDS frequency domain resource of making an appointment.
Alternatively, determining unit 801 also can determine that search cell is used for the Preamble sequence of DDS.This Preamble sequence is for when DDS carries this Preamble sequence, and equipment 800 can determine whether the signal receiving in the DDS transmission opportunity of search is described DDS according to the correlation peak of the signal receiving in the DDS transmission opportunity of search and this Preamble sequence.
Alternatively, search cell is that Serving cell sends for the Preamble sequence of DDS.
Alternatively, as an embodiment, when this search cell is the Serving cell of equipment 800, this search cell can be the Preamble sequence of this Serving cell of this Serving cell transmission for the Preamble sequence of DDS.The DDS frequency domain resource of this Serving cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, as another embodiment, when this search cell is the neighbor cell of Serving cell of equipment 800, this search cell can be the Preamble sequence of this neighbor cell of sending from this Serving cell for the Preamble sequence of DDS.The DDS frequency domain resource of the neighbor cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, search cell is that neighbor cell sends for the Preamble sequence of DDS.Alternatively, as an embodiment, when this search cell is the neighbor cell of Serving cell of equipment 800, this search cell can be the Preamble sequence of this neighbor cell of sending from this neighbor cell for the Preamble sequence of DDS.The DDS frequency domain resource of the neighbor cell that further, this neighbor cell sends can be by broadcast transmission.
Alternatively, as another embodiment, search cell can be the Preamble sequence of making an appointment for the Preamble sequence of DDS.
Obviously, DDS transmission cycle, DDS frequency domain resource and Preamble sequence can determine or make an appointment according to the message receiving, and for any definite mode in DDS transmission cycle, DDS frequency domain resource and Preamble sequence, is not subject to other impact.
Alternatively, search cell is Serving cell, neighbor cell or Serving cell and neighbor cell, can determine according to the service conditions of equipment 800, or be determined by Serving cell.
Alternatively, the list of neighbor cell, can be specified or be determined by equipment 800 by Serving cell.
Search unit 802 can be searched for a DDS in the plurality of DDS transmission opportunity.
Alternatively, search unit 802 can be searched for DDS to the DDS transmission opportunity before maximum DDS transmission opportunity in the zero hour from this DDS transmission cycle.This maximum DDS transmission opportunity refers to last the occupied DDS transmission opportunity starting the zero hour from this DDS transmission cycle.Obviously, all DDS certainly (comprised maximum DDS transmission opportunity) and send before maximum DDS transmission opportunity, 800 of equipment this part time search DDS in DDS transmission cycle, can avoid doing invalid search in the time after maximum DDS transmission opportunity, saves power consumption.
Further, when search cell is the Serving cell of equipment 800, search unit 802 can obtain from Serving cell maximum DDS transmission opportunity.
Or when search cell is the neighbor cell of equipment 800, search unit 802 can obtain from Serving cell the maximum DDS transmission opportunity of neighbor cell.
Or when search cell is the neighbor cell of equipment 800, search unit 802 can obtain from neighbor cell the maximum DDS transmission opportunity of neighbor cell.
Further, if cannot know maximum DDS transmission opportunity, maximum DDS transmission opportunity equals the total DDS transmission opportunity number in transmission cycle.
Alternatively, equipment 800 can have radio-frequency channel and/or the Baseband Channel identical with the transmission bandwidth of DDS, when carrying out device discovery, uses this passage can reduce power consumption.
Alternatively, as an embodiment, when the DDS sending carries Preamble sequence, search unit 802 can determine that the signal receiving is DDS or noise according to the correlation peak of Preamble sequence and the signal receiving in the DDS transmission opportunity of search.Search unit 802 can obtain search cell for the correlation peak of the signal that receives in the Preamble sequence of DDS and DDS transmission opportunity in search; Can there is DDS in search unit 802, otherwise 802 of search units think that the DDS transmission opportunity of this search does not exist DDS in the DDS transmission opportunity of determining this search when this correlation peak is more than or equal to predetermined threshold value.Further, a kind of search cell that obtains is for the mode of the correlation peak of the signal that receives in the Preamble sequence of DDS and DDS transmission opportunity in search, specifically can be implemented as: generate with search cell for the identical Preamble sequence of the Preamble sequence of DDS, calculate the correlation peak of the signal receiving in a Preamble sequence and DDS transmission opportunity searching for.
Find that unit 803 is according to this discovery of DDS realization to the first equipment.
While effective DDS being detected in definite certain the DDS transmission opportunity of equipment 800, this just illustrates that this DDS transmission opportunity must have a first corresponding equipment, just can find the first corresponding equipment according to this DDS.
Alternatively, as an embodiment, equipment 800 is determined the mode that effective DDS detected in certain DDS transmission opportunity, can be that equipment 800 detects effective Preamble sequence in certain DDS transmission opportunity.
Alternatively, as an embodiment, find that unit 803 can be used for when a DDS carries the id information of the first equipment, a DDS is carried out to demodulating and decoding to obtain the id information of the first equipment, to realize the discovery to described the first equipment.
Alternatively, as another embodiment, when this DDS does not carry the id information of the first equipment, find that 803Ke Xiang Serving cell, unit sends the numbering of the DDS transmission opportunity that DDS takies, find that id information that unit 803 can receive the first equipment that the numbering of the DDS transmission opportunity that Serving cell takies according to DDS sends is to realize the discovery to described the first equipment.Alternatively, as a kind of execution mode, the id information of the first equipment that the numbering of the DDS transmission opportunity that Serving cell takies according to DDS sends, the id information (when search cell is Serving cell) of the first equipment that can be the numbering of DDS transmission opportunity that takies according to DDS of Serving cell and the DDS transmission opportunity of Serving cell send with the corresponding relation of the equipment of transmission DDS, or the id information (when search cell is neighbor cell) of the first equipment of sending of the corresponding relation of the numbering of DDS transmission opportunity that takies according to DDS of Serving cell and the DDS transmission opportunity of neighbor cell and the equipment of transmission DDS.
Alternatively, as another embodiment, when this DDS does not carry the id information of the first equipment, and when search cell is neighbor cell, the numbering of finding the DDS transmission opportunity that 803Ke Xiang neighbor cell, unit transmission DDS takies, the id information of the first equipment that the numbering of the DDS transmission opportunity that discovery 803Ke reception of neighboring cell, unit takies according to DDS sends is to realize the discovery to described the first equipment.Alternatively, as a kind of execution mode, the id information of the first equipment that the id information of the first equipment that the numbering of the DDS transmission opportunity that neighbor cell takies according to DDS sends can be the numbering of DDS transmission opportunity that takies according to DDS of neighbor cell and the DDS transmission opportunity of neighbor cell to be sent with the corresponding relation of the equipment of transmission DDS.
Fig. 9 is the schematic block diagram of embodiment of the present invention base station.The base station 900 of Fig. 9 can comprise processor 902, transmitting element 903 and memory 904.
Processor 902 can be determined the DDS frequency domain resource of base station.Memory 904 can be stored and make processor 902 determine the instruction of the DDS frequency domain resource of base station.Wherein, this DDS frequency domain resource is for transmitting the DDS of the equipment of this base station of access.
Processor 902 also can be determined the DDS transmission cycle of this base station.Memory 904 also can be stored and make processor 902 determine the instruction of the DDS transmission cycle of this base station.
Processor 902 can be divided into this DDS transmission cycle a plurality of DDS transmission opportunitys in time.Memory 904 also can be stored and make processor 902 this DDS transmission cycle is divided in time to the instruction of a plurality of DDS transmission opportunitys.Wherein, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, only takies this DDS frequency domain resource in frequency domain resource.An equipment is selected identical DDS transmission opportunity in a plurality of continuous DDS transmission cycles.
Transmitting element 903, can be used for to the information of the plurality of DDS transmission opportunity of transmission of this base station of access.
In the embodiment of the present invention, base station is by being DDS configuration transfer resource and transmission cycle, and transmission cycle is divided into the transmission opportunity of upper quadrature of a plurality of time, and a transmission opportunity can only be carried a DDS, thereby avoided a plurality of equipment to send the problem that equipment that DDS causes cannot find to share with oneself other equipment of same DDS time simultaneously.
Processor 902 is controlled the operation of base station 900, and processor 902 can also be called CPU(Central Processing Unit, CPU).Memory 904 can comprise read-only memory and random access memory, and provides instruction and data to processor 902.A part for memory 904 can also comprise nonvolatile RAM (NVRAM).In concrete application, each assembly of base station 900 is coupled by bus system 901, and wherein bus system 901, except comprising data/address bus, can also comprise power bus, control bus and status signal bus in addition etc.But for the purpose of clearly demonstrating, in the drawings various buses are all designated as to bus system 901.
The method that the invention described above embodiment discloses can be applied in processor 902, or is realized by processor 902.Processor 902 may be a kind of integrated circuit (IC) chip, has the disposal ability of signal.In implementation procedure, each step of said method can complete by the integrated logic circuit of the hardware in processor 902 or the instruction of form of software.Above-mentioned processor 902 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), ready-made programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic device, discrete hardware components.Can realize or carry out disclosed each method, step and logic diagram in the embodiment of the present invention.General processor can be that microprocessor or this processor can be also the processors of any routine etc.Step in conjunction with the disclosed method of the embodiment of the present invention can directly be presented as that hardware decoding processor is complete, or complete with the hardware in decoding processor and software module combination.Software module can be positioned at random asccess memory, and flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.This storage medium is positioned at memory 904, and the information in processor 902 read memories 904 completes the step of said method in conjunction with its hardware.
Processor 902 can be determined the DDS frequency domain resource of base station.
Alternatively, processor 902 can determine that the partial fixing frequency domain resource in the frequency domain resource of base station is DDS frequency domain resource.
Further, processor 902 can be using the frequency domain resource of continuous 12 subcarrier sizes in the frequency domain resource of base station as DDS frequency domain resource, or using the frequency domain resource of continuous 72 subcarrier sizes in the frequency domain resource of base station as DDS frequency domain resource.
Alternatively, processor 902 can determine that the frequency domain resource of making an appointment in the frequency domain resource of base station is DDS frequency domain resource.Further; the frequency domain resource of making an appointment; it can be the resource of parton carrier wave that is positioned at the transmission bandwidth upper sideband of base station; as shown in Figure 3 a; also can be the resource of parton carrier wave that is positioned at the transmission bandwidth lower sideband of base station; as described in Fig. 3 b; it can also be the frequency domain resource that is positioned at the parton carrier wave in the middle of the transmission bandwidth of base station; as shown in Figure 3 c; or be close to the resource of the parton carrier wave in the boundary belt of frequency domain resource bandwidth of base station; as shown in Figure 3 d, the parton carrier resource or in other any channel widths.
Alternatively, transmitting element 903 also can be after determining the DDS frequency domain resource of base station, to the equipment of base station, sends this DDS frequency domain resource.Further, can, by the mode of broadcast, to the equipment of base station, send the information of DDS frequency domain resource.
Processor 902 also can be determined the DDS transmission cycle of this base station.
Alternatively, processor 902 can be determined the DDS transmission cycle that time cycle of making an appointment is this base station.Further, the time cycle of making an appointment can be fixed value, for example 4096ms or 1024ms.
Alternatively, processor 902 can be determined this DDS transmission cycle according to the quantity of the access device of this base station.DDS transmission cycle is dynamically determined according to the number of devices of access base station, can when the number of devices that accesses community is few, reduce DDS transmission cycle, thereby can accelerate device discovery; When the number of devices that accesses community is many, increase DDS transmission cycle, thereby avoid DDS transmission collision.Further, can determine that this DDS transmission cycle is 2 nms, wherein, these are 2 years old nfor being greater than the smallest positive integral of M, the equipment sum that M is this base station access.For example, the equipment of access base station is 255,2 nin should select n=8, this DDS transmission cycle is 2 8ms, i.e. 256ms.
Alternatively, processor 902 can comprehensive above-mentioned two schemes, determines this DDS transmission cycle, and in other words, processor 902 can be determined this DDS transmission cycle according to the quantity of the access device of this base station and the time cycle of making an appointment.Further, processor 902 can determine that this DDS transmission cycle is max (2 n, X) ms, wherein, these are 2 years old nfor being more than or equal to the smallest positive integral of M, the equipment sum that M is this base station access, this X is a predetermined value, for setting the shortest DDS transmission cycle of DDS.When 2 nwhile being more than or equal to cycle predetermined time X, select 2 nas this DDS transmission cycle; When 2 nwhile being less than cycle predetermined time X, select X as this DDS transmission cycle.DDS transmission cycle is according to the quantity of access base station and combine search time of meeting DDS setting, and when number of devices in access community is few, not needing increases the number of times that sends DDS transmission, and being conducive to reduction equipment increases owing to repeatedly retransmitting the power consumption that DDS causes; Meanwhile, when the number of devices that accesses community is many, increase DDS transmission cycle, thereby avoid DDS transmission collision.Further, above-mentioned time cycle X can be 4096 or 1024.
Alternatively, transmitting element 903 can, after determining the DDS transmission cycle of this base station, send the information of this DDS transmission cycle to the equipment of base station.
Further, transmitting element 903 can, by the mode of broadcast, send the information of this DDS transmission cycle to the equipment of access base station.
Alternatively, processor 902 can also determine in community that, for the leading Preamble sequence of DDS, this Preamble sequence can be used for searching for DDS.As a kind of execution mode, processor 902 can determine that the Preamble sequence of making an appointment is as this Preamble sequence.For example, first Preamble sequence of the Physical Random Access Channel PRACH resource of the community of making an appointment is this Preamble sequence, or first Preamble sequence that A gathers or B gathers of agreement PRACH resource is as this Preamble sequence.The subset of the Preamble set of the PRACH that further, this Preamble sequence can be community.As another kind of execution mode, can be after processor 902 be identified for the Preamble sequence of DDS, transmitting element 903 sends this Preamble sequence to the equipment of access base station.
Processor 902, can be divided into this DDS transmission cycle a plurality of DDS transmission opportunitys in time.
A DDS transmission opportunity is only carried a DDS, in a DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, in frequency domain resource, only take this DDS frequency domain resource, this just guarantees that DDS transmission opportunity and equipment (or DDS) are relation one to one between the two, and an equipment (DDS) has a DDS transmission opportunity in a DDS transmission cycle.Meanwhile, any two the DDS transmission opportunitys between a plurality of DDS transmission opportunitys of Yi Ge community are quadrature in time, and in other words, any two DDS transmission opportunitys are not occured simultaneously in time.That is to say, a plurality of DDS in community can not clash in time-domain resource He in frequency domain resource.
Alternatively, when processor 902 is cut apart DDS transmission cycle in time, time-domain resource that can be using the time-domain resource of 1ms as a DDS transmission opportunity.For example, a DDS transmission opportunity, can take the resource of 1ms in the time, and frequency domain resource takies the resource of 12 subcarriers.
Alternatively, a plurality of DDS transmission opportunitys can be continuous in time, and what DDS was used is the continuous time-domain resource in base station.
Alternatively, a plurality of DDS transmission opportunitys can be discontinuous in time, and what DDS was used is the discontinuous time-domain resource in base station.For example, in LTE, can be every several subframes, there is the resource of 12 subcarrier sizes of a subframe for transmitting DDS, every 10 subframes for example, have the resource of 12 subcarrier sizes of a subframe for transmitting DDS, adjacent two DDS transmission opportunity interval 10ms.
Alternatively, transmitting element 903 also can send to the equipment of this base station (distribution) information that takies of DDS transmission opportunity.
Further, sending DDS transmission opportunity take (distribution) information to the equipment that accesses this base station, can be the information of maximum DDS transmission opportunity that sends to the equipment of this base station of access.Maximum DDS transmission opportunity refers in a DDS transmission cycle, last the occupied DDS transmission opportunity starting the zero hour from DDS transmission cycle.Equipment transmission DDS transmission opportunity to this base station of access takies (distribution) information, can be also the maximum DDS transmission opportunity information of first idle DDS transmission opportunity afterwards.Equipment transmission DDS transmission opportunity to this base station of access takies (distribution) information, can also be the occupied information of all DDS transmission opportunitys in DDS transmission cycle.
Figure 10 is the schematic block diagram that the embodiment of the present invention sends the equipment of DDS.The equipment 1000 of Figure 10 can comprise processor 1002, transmitting element 1003 and memory 1004.
Processor 1002 can be determined DDS transmission cycle and the DDS frequency domain resource of base station.Memory 1004 can be stored and make processor 1002 determine the DDS transmission cycle of base station and the instruction of DDS frequency domain resource.Wherein, this DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in DDS transmission cycle, the DDS of equipment 1000 only takies a DDS transmission opportunity in time, only takies this DDS frequency domain resource in frequency domain resource.
Processor 1002 also can determine that DDS transmission opportunity idle in the plurality of DDS transmission opportunity is as the current DDS transmission opportunity of equipment 1000.Memory 1004 also can be stored and make processor 1002 determine that DDS transmission opportunity idle in the plurality of DDS transmission opportunity is as the instruction of the current DDS transmission opportunity of equipment 1000.
Transmitting element 1003 can send in this current DDS transmission opportunity the current DDS of this equipment 1000.
In the embodiment of the present invention, equipment 1000 by selecting to transmit DDS in an idle DDS transmission opportunity in DDS transmission cycle, a DDS transmission opportunity is only carried a DDS, thereby has avoided a plurality of equipment to transmit the problem that equipment that DDS causes cannot be searched for other equipment of simultaneously uploading with it simultaneously.
The operation of processor 1002 control appliances 1000, processor 1002 can also be called CPU(Central Processing Unit, CPU).Memory 1004 can comprise read-only memory and random access memory, and provides instruction and data to processor 1002.A part for memory 1004 can also comprise nonvolatile RAM (NVRAM).In concrete application, each assembly of equipment 1000 is coupled by bus system 1005, and wherein bus system 1005, except comprising data/address bus, can also comprise power bus, control bus and status signal bus in addition etc.But for the purpose of clearly demonstrating, in the drawings various buses are all designated as to bus system 1005.
The method that the invention described above embodiment discloses can be applied in processor 1002, or is realized by processor 1002.Processor 1002 may be a kind of integrated circuit (IC) chip, has the disposal ability of signal.In implementation procedure, each step of said method can complete by the integrated logic circuit of the hardware in processor 1002 or the instruction of form of software.Above-mentioned processor 1002 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), ready-made programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic device, discrete hardware components.Can realize or carry out disclosed each method, step and logic diagram in the embodiment of the present invention.General processor can be that microprocessor or this processor can be also the processors of any routine etc.Step in conjunction with the disclosed method of the embodiment of the present invention can directly be presented as that hardware decoding processor is complete, or complete with the hardware in decoding processor and software module combination.Software module can be positioned at random asccess memory, and flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.This storage medium is positioned at memory 1004, and the information in processor 1002 read memories 1004 completes the step of said method in conjunction with its hardware.
In the embodiment of the present invention, an equipment can select identical DDS transmission opportunity as the DDS transmission opportunity of this equipment in a plurality of continuous DDS transmission cycles.Generally, the order of the DDS transmission opportunity of an equipment in DDS transmission cycle can not change.In each DDS transmission cycle, this equipment all can be sent in the DDS transmission opportunity of the equipment of distributing to and transmit DDS, so that other equipment search this equipment.
Alternatively, as an embodiment, processor 1002 also can be used for equipment 1000 to be exited base station and discharges current DDS transmission opportunity.Memory 1004 also can be stored the instruction that makes processor 1002 make equipment 1000 exit base station and discharge current DDS transmission opportunity.
When equipment 1000 equipment exit base station, discharge the current DDS transmission opportunity that this equipment occupies.The DDS transmission opportunity dischargeing, can be by the hold facility of other access base stations.
Processor 1002 can be determined DDS transmission cycle and the DDS frequency domain resource of base station.
Alternatively, processor 1002 can be determined the DDS transmission cycle that time cycle of making an appointment with base station is base station.
Alternatively, equipment 1000 also comprises receiving element 1001.
Alternatively, receiving element 1001 can receive the information of the DDS transmission cycle of base station transmission, and the information of the DDS transmission cycle that processor 1002 can send according to base station be determined the DDS transmission cycle of base station.Further, base station can adopt the mode of broadcast to send the information of DDS transmission cycle.
Alternatively, processor 1002 can be determined the DDS frequency domain resource that the frequency domain resource of making an appointment with base station is base station.Further; the frequency domain resource of making an appointment; it can be the resource of parton carrier wave that is positioned at the transmission bandwidth upper sideband of base station; as shown in Figure 3 a; also can be the resource of parton carrier wave that is positioned at the transmission bandwidth lower sideband of base station; as described in Fig. 3 b; it can also be the frequency domain resource that is positioned at the parton carrier wave in the middle of the transmission bandwidth of base station; as shown in Figure 3 c; or be close to the resource of the parton carrier wave in the boundary belt of frequency domain resource bandwidth of base station; as shown in Figure 3 d, the parton carrier resource or in other any channel widths.
Alternatively, receiving element 1001 can receive the information of the DDS frequency domain resource (frequency domain resource that DDS is shared) of base station transmission.Further, the information of DDS frequency domain resource can be that base station can adopt the mode of broadcast to send.Further, if a plurality of DDS transmission opportunity is continuous in time, only need to receive the DDS frequency domain resource that base station sends; If a plurality of DDS transmission opportunitys are discontinuous in time, need to receive shared frequency domain resource and the time-domain resource of DDS of base station broadcast.The information of time-domain resource can be the information of a plurality of DDS transmission opportunitys.
Alternatively, the frequency domain resource that DDS frequency domain resource takies, can be the frequency domain resource of continuous 12 subcarrier sizes or the frequency domain resource of continuous 72 subcarrier sizes.
Processor 1002 also can determine that DDS transmission opportunity idle in the plurality of DDS transmission opportunity is as the current DDS transmission opportunity of equipment 1000.
Alternatively, receiving element 1001 can receive the idle DDS transmission opportunity of this base station assigns, and processor 1002 can determine that the idle DDS transmission opportunity of this base station assigns is as current DDS transmission opportunity.
Further, receiving element 1001 can receive the DDS transmission opportunity of the first free time of this base station assigns, and processor 1002 can determine that first idle DDS transmission opportunity starting from DDS transmission cycle of base station assigns is as current DDS transmission opportunity.In other words, the idle DDS transmission opportunity of this base station assigns is first the idle DDS transmission opportunity starting from DDS transmission cycle.
For the power consumption of minimizing equipment search, when the DDS of all devices selects DDS transmission opportunity, should follow as much as possible a principle, as much as possible zero hour chosen distance device discovery signal period nearest DDS transmission opportunity.First idle DDS transmission opportunity that base station selected DDS transmission cycle starts is devices allocation DDS transmission opportunity, just can guarantee that DDS concentrates in one section of DDS transmission opportunity that DDS transmission cycle starts as much as possible, i.e. DDS transmission opportunity in device discovery signal transmission effective time as shown in Figure 2.
Alternatively, processor 1002 can obtain idle DDS transmission opportunity as current DDS transmission opportunity by scanning one or more these DDS transmission cycles.The mode of the DDS transmission opportunity of this definite equipment, can follow the principle of " as much as possible zero hour chosen distance device discovery signal period nearest DDS transmission opportunity " equally.Be that processor 1002 can obtain first idle DDS transmission opportunity as current DDS transmission opportunity by scanning one or more these DDS transmission cycles.
Alternatively, receiving element 1001 can receive the occupied information of the interior DDS transmission opportunity of DDS transmission cycle of this base station transmission, and in the DDS transmission cycle that processor 1002 can send according to this base station, the occupied information of DDS transmission opportunity be determined this current DDS transmission opportunity.Definite principle can be followed the principle of " as much as possible zero hour chosen distance device discovery signal period nearest DDS transmission opportunity " equally, be that processor 1002 can be according to the occupied information of DDS transmission opportunity in the DDS transmission cycle of this base station transmission, first idle DDS transmission opportunity that the chosen distance device discovery signal period starts is this current DDS transmission opportunity.
Further, the occupied information of the DDS transmission opportunity that base station sends, can be the numbering of last occupied DDS transmission opportunity of starting from DDS transmission cycle; Or the numbering of first the idle DDS transmission opportunity starting from DDS transmission cycle; Or the occupied information of the interior all DDS transmission opportunitys of DDS transmission cycle.
For example, the DDS transmission cycle of supposing base station is 4096ms, comprising 4096 DDS transmission opportunitys.Suppose that base station accessed 300 equipment altogether, these 300 hold facilities from first DDS transmission opportunity, start until all DDS transmission opportunitys of the 300th DDS transmission opportunity, base station can be by last occupied DDS, 300, broadcast is gone out; Or base station can be by first the continuous idle DDS transmission opportunity starting from DDS transmission cycle, 301, broadcast is gone out.If the DDS transmission opportunity of these 300 hold facilities discontinuous (may be because the mobility of equipment causes), supposes that last occupied DDS transmission opportunity is 403, base station can be by last occupied DDS, 403, and broadcast is gone out; Or base station can be by first the continuous idle DDS transmission opportunity starting from DDS transmission cycle, 404, broadcast is gone out; Or the occupied information of 4096 DDS transmission opportunitys is broadcasted away in base station, for example by 1bit information, represent that whether a DDS transmission opportunity is occupied, by 4096bits information, the occupied information of DDS transmission opportunity is broadcasted away.
Further, equipment 1000 can be the equipment that initially accesses this base station.
Further, when this base station of the initial access of equipment 1000, can determine that first the idle DDS transmission opportunity that approaches this DDS transmission cycle zero hour is most as current DDS transmission opportunity.
Further, an equipment can be selected identical DDS transmission opportunity in a plurality of continuous DDS transmission cycles.
Alternatively, processor 1002 also can determine that base station is used for first leading (Preamble) sequence of DDS.
Further, Physical Random Access Channel (the PRACH that this Preamble sequence is this base station, the subset of Preamble set PhysicalRandom Access Channel), in other words, this Preamble sequence can be a Preamble sequence or a plurality of Preamble sequence in PRACH resource.
Alternatively, processor 1002 can determine that the Preamble sequence of making an appointment is as a Preamble sequence.For example, first Preamble sequence of the PRACH resource of the base station of making an appointment is a Preamble sequence, or first Preamble sequence that A gathers or B gathers of agreement PRACH resource is as a Preamble sequence.
Alternatively, receiving element 1001 can receive the Preamble sequence for DDS that base station sends, and the Preamble sequence for DDS that processor 1002 can send according to base station is determined a Preamble sequence.Further, the mode that base station sends can be broadcast transmission.Further, a Preamble sequence in PRACH resource or a plurality of Preamble sequence can be broadcasted for device discovery in base station.
Transmitting element 1003 can send in this current DDS transmission opportunity the current DDS of this equipment 1000.
Further, in current DDS, portability is for a Preamble sequence of the random access base station of current device, and in current DDS, a Preamble sequence is for the current DDS of other device discoveries.Because Preamble sequence entrained in DDS is to have good auto-correlation and the sequence of their cross correlation, as PN sequence, ZC sequence etc., search equipment can generate a sequence identical with Preamble sequence, then by obtaining the correlation peak of this sequence and signal in DDS transmission opportunity, judges whether DDS of this signal.
Further, current DDS can also carry following at least one: the Timing Advance of the id information of equipment 1000, the transmission power information of current DDS, current DDS (TA, Timing Advance) information.
Figure 11 is the schematic block diagram of embodiment of the present invention search equipment.The equipment 1100 of Figure 11 can comprise processor 1102, receiving element 1101 and memory 1104.
Processor 1102, can determine the DDS transmission cycle of search cell and the DDS frequency domain resource of search cell.Memory 1104 can be stored and make processor 1102 determine the instruction of the DDS transmission cycle of search cell and the DDS frequency domain resource of search cell.Wherein, this DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of the plurality of DDS transmission opportunity, a DDS transmission opportunity is only carried a DDS, in DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, only takies this DDS frequency domain resource in frequency domain resource.。This search cell is the Serving cell at equipment 1100 places and/or the neighbor cell of this Serving cell.
Receiving element 1101 can be searched for DDS in the plurality of DDS transmission opportunity.Wherein, a DDS is that the first equipment sends.
Processor 1102, can realize the discovery to the first equipment according to this DDS.Memory 1104 can be stored and make processor 1102 realize the instruction to the discovery of the first equipment according to this DDS.
In the embodiment of the present invention, equipment 1100 is by searching for DDS in the DDS transmission opportunity beyond the shared DDS transmission opportunity of equipment 1100 in a plurality of DDS transmission opportunitys in DDS transmission cycle, and a transmission opportunity can only be carried a DDS, thereby avoided a plurality of equipment to transmit the problem that equipment that DDS causes cannot be searched for other equipment of simultaneously uploading with it simultaneously.
The operation of processor 1102 control appliances 1100, processor 1102 can also be called CPU(Central Processing Unit, CPU).Memory 1104 can comprise read-only memory and random access memory, and provides instruction and data to processor 1102.A part for memory 1104 can also comprise nonvolatile RAM (NVRAM).In concrete application, each assembly of equipment 1100 is coupled by bus system 1105, and wherein bus system 1105, except comprising data/address bus, can also comprise power bus, control bus and status signal bus in addition etc.But for the purpose of clearly demonstrating, in the drawings various buses are all designated as to bus system 1105.
The method that the invention described above embodiment discloses can be applied in processor 1102, or is realized by processor 1102.Processor 1102 may be a kind of integrated circuit (IC) chip, has the disposal ability of signal.In implementation procedure, each step of said method can complete by the integrated logic circuit of the hardware in processor 1102 or the instruction of form of software.Above-mentioned processor 1102 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), ready-made programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic device, discrete hardware components.Can realize or carry out disclosed each method, step and logic diagram in the embodiment of the present invention.General processor can be that microprocessor or this processor can be also the processors of any routine etc.Step in conjunction with the disclosed method of the embodiment of the present invention can directly be presented as that hardware decoding processor is complete, or complete with the hardware in decoding processor and software module combination.Software module can be positioned at random asccess memory, and flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.This storage medium is positioned at memory 1104, and the information in processor 1102 read memories 1104 completes the step of said method in conjunction with its hardware.
Processor 1102 can be determined DDS transmission cycle and the DDS frequency domain resource of search cell.
Alternatively, the DDS transmission cycle of search cell is that Serving cell sends.
Alternatively, as an embodiment, when this search cell is the Serving cell of equipment 1000, the DDS transmission cycle of this search cell can be the DDS transmission cycle of this Serving cell of this Serving cell transmission.The DDS frequency domain resource of this Serving cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, as another embodiment, when this search cell is the neighbor cell of Serving cell of equipment 1000, the DDS transmission cycle of this search cell can be the DDS transmission cycle of this neighbor cell of sending from this Serving cell.The DDS frequency domain resource of the neighbor cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, the DDS transmission cycle of search cell is that neighbor cell sends.Alternatively, as another embodiment, when this search cell is the neighbor cell of Serving cell of equipment 1000, the DDS transmission cycle of this search cell can be the DDS transmission cycle of this neighbor cell of sending from this neighbor cell.The DDS frequency domain resource of the neighbor cell that further, this neighbor cell sends can be by broadcast transmission.
Alternatively, as another embodiment, the DDS transmission cycle of this search cell can be the DDS transmission cycle of making an appointment.
Alternatively, the DDS frequency domain resource of search cell is that Serving cell sends.
Alternatively, as an embodiment, when this search cell is the Serving cell of equipment 1000, the DDS frequency domain resource of this search cell can be the DDS frequency domain resource of this Serving cell of this Serving cell transmission.The DDS frequency domain resource of this Serving cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, as another embodiment, when this search cell is the neighbor cell of Serving cell of equipment 1000, the DDS frequency domain resource of this search cell can be the DDS frequency domain resource of this neighbor cell of sending from this Serving cell.The DDS frequency domain resource of the neighbor cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, the DDS frequency domain resource of search cell is that neighbor cell sends.Alternatively, as an embodiment, when this search cell is the neighbor cell of Serving cell of equipment 1000, the DDS frequency domain resource of this search cell can be the DDS frequency domain resource of this neighbor cell of sending from this neighbor cell.The DDS frequency domain resource of the neighbor cell that further, this neighbor cell sends can be by broadcast transmission.
Alternatively, as another embodiment, the DDS frequency domain resource of this search cell can be the DDS frequency domain resource of making an appointment.
Alternatively, processor 1102 also can determine that search cell is used for the Preamble sequence of DDS.This Preamble sequence is for when DDS carries this Preamble sequence, and equipment 1000 can determine whether the signal receiving in the DDS transmission opportunity of search is described DDS according to the correlation peak of the signal receiving in the DDS transmission opportunity of search and this Preamble sequence.
Alternatively, search cell is that Serving cell sends for the Preamble sequence of DDS.
Alternatively, as an embodiment, when this search cell is the Serving cell of equipment 1000, this search cell can be the Preamble sequence of this Serving cell of this Serving cell transmission for the Preamble sequence of DDS.The DDS frequency domain resource of this Serving cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, as another embodiment, when this search cell is the neighbor cell of Serving cell of equipment 1000, this search cell can be the Preamble sequence of this neighbor cell of sending from this Serving cell for the Preamble sequence of DDS.The DDS frequency domain resource of the neighbor cell that further, this Serving cell sends can be by broadcast transmission.
Alternatively, search cell is that neighbor cell sends for the Preamble sequence of DDS.Alternatively, as an embodiment, when this search cell is the neighbor cell of Serving cell of equipment 1000, this search cell can be the Preamble sequence of this neighbor cell of sending from this neighbor cell for the Preamble sequence of DDS.The DDS frequency domain resource of the neighbor cell that further, this neighbor cell sends can be by broadcast transmission.
Alternatively, as another embodiment, search cell can be the Preamble sequence of making an appointment for the Preamble sequence of DDS.
Obviously, DDS transmission cycle, DDS frequency domain resource and Preamble sequence can determine or make an appointment according to the message receiving, and for any definite mode in DDS transmission cycle, DDS frequency domain resource and Preamble sequence, is not subject to other impact.
Alternatively, search cell is Serving cell, neighbor cell or Serving cell and neighbor cell, can determine according to the service conditions of equipment 1100, or be determined by Serving cell.
Alternatively, the list of neighbor cell, can be specified or be determined by equipment 1100 by Serving cell.
Receiving element 1101 can be searched for a DDS in the plurality of DDS transmission opportunity.
Alternatively, receiving element 1101 can be searched for DDS to the DDS transmission opportunity before maximum DDS transmission opportunity in the zero hour from this DDS transmission cycle.This maximum DDS transmission opportunity refers to last the occupied DDS transmission opportunity starting the zero hour from this DDS transmission cycle.Obviously, all DDS certainly (comprised maximum DDS transmission opportunity) and send before maximum DDS transmission opportunity, 1100 of equipment this part time search DDS in DDS transmission cycle, can avoid doing invalid search in the time after maximum DDS transmission opportunity, save power consumption.
Further, when search cell is the Serving cell of equipment 1100, receiving element 1101 can obtain from Serving cell maximum DDS transmission opportunity.
Or when search cell is the neighbor cell of equipment 1100, receiving element 1101 can obtain from Serving cell the maximum DDS transmission opportunity of neighbor cell.
Or when search cell is the neighbor cell of equipment 1100, receiving element 1101 can obtain from neighbor cell the maximum DDS transmission opportunity of neighbor cell.
Further, if cannot know maximum DDS transmission opportunity, maximum DDS transmission opportunity equals the total DDS transmission opportunity number in transmission cycle.
Alternatively, equipment 1100 can have radio-frequency channel and/or the Baseband Channel identical with the transmission bandwidth of DDS, when carrying out device discovery, uses this passage can reduce power consumption.
Alternatively, as an embodiment, when the DDS sending carries Preamble sequence, the correlation peak of the signal that processor 1102 can receive according to Preamble sequence and receiving element 1101 in the DDS transmission opportunity of search determines that the signal of reception is DDS or noise.Processor 1102 can obtain search cell for the correlation peak of the signal that receives in the Preamble sequence of DDS and DDS transmission opportunity in search; Can there is DDS in processor 1102, otherwise 1102 of processors think that the DDS transmission opportunity of this search does not exist DDS in the DDS transmission opportunity of determining this search when this correlation peak is more than or equal to predetermined threshold value.Further, processor 1102 obtains search cell for the mode of the correlation peak of the signal that receives in the Preamble sequence of DDS and DDS transmission opportunity in search, specifically can be implemented as: processor 1102 generates with search cell for the identical Preamble sequence of the Preamble sequence of DDS, processor 1102 calculates the correlation peak of the signal that Preamble sequences and receiving element 1101 receive in the DDS transmission opportunity of searching for.
Processor 1102 is realized the discovery to the first equipment according to this DDS.
While effective DDS being detected in definite certain the DDS transmission opportunity of equipment 1100, this just illustrates that this DDS transmission opportunity must have a first corresponding equipment, just can find the first corresponding equipment according to this DDS.
Alternatively, as an embodiment, equipment 1100 is determined the mode that effective DDS detected in certain DDS transmission opportunity, can be that equipment 1100 detects effective Preamble sequence in certain DDS transmission opportunity.
Alternatively, as an embodiment, processor 1102 can be used for when a DDS carries the id information of the first equipment, and a DDS is carried out to demodulating and decoding to obtain the id information of the first equipment, to realize the discovery to described the first equipment.
Alternatively, as another embodiment, when this DDS does not carry the id information of the first equipment, equipment 1100 also can comprise transmitting element 1103, can send to Serving cell the numbering of the DDS transmission opportunity that DDS takies, receiving element 1101 can receive the id information of the first equipment that the numbering of the DDS transmission opportunity that Serving cell takies according to DDS sends to realize the discovery to described the first equipment.Alternatively, as a kind of execution mode, the id information of the first equipment that the numbering of the DDS transmission opportunity that Serving cell takies according to DDS sends, the id information (when search cell is Serving cell) of the first equipment that can be the numbering of DDS transmission opportunity that takies according to DDS of Serving cell and the DDS transmission opportunity of Serving cell send with the corresponding relation of the equipment of transmission DDS, or the id information (when search cell is neighbor cell) of the first equipment of sending of the corresponding relation of the numbering of DDS transmission opportunity that takies according to DDS of Serving cell and the DDS transmission opportunity of neighbor cell and the equipment of transmission DDS.
Alternatively, as another embodiment, when this DDS does not carry the id information of the first equipment, and when search cell is neighbor cell, transmitting element 1103 can send to neighbor cell the numbering of the DDS transmission opportunity that DDS takies, and the id information of the first equipment that the numbering of the DDS transmission opportunity that receiving element 1101 can reception of neighboring cell takies according to DDS sends is to realize the discovery to described the first equipment.Alternatively, as a kind of execution mode, the id information of the first equipment that the id information of the first equipment that the numbering of the DDS transmission opportunity that neighbor cell takies according to DDS sends can be the numbering of DDS transmission opportunity that takies according to DDS of neighbor cell and the DDS transmission opportunity of neighbor cell to be sent with the corresponding relation of the equipment of transmission DDS.
Those of ordinary skills can recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with the combination of electronic hardware or computer software and electronic hardware.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the system of foregoing description, device and unit, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
In the several embodiment that provide in the application, should be understood that disclosed system, apparatus and method can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, during actual realization, can have other dividing mode, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
The described unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in a plurality of network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.
If described function usings that the form of SFU software functional unit realizes and during as production marketing independently or use, can be stored in a computer read/write memory medium.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words or the part of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) carry out all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CDs.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by the described protection range with claim.

Claims (40)

1. a transmission method for device discovery signal, is characterized in that, comprising:
Determine device discovery signal DDS transmission cycle and the DDS frequency domain resource of base station, wherein, described DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of described a plurality of DDS transmission opportunitys, a DDS transmission opportunity is only carried a DDS, in described DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time-domain, only takies described DDS frequency domain resource on frequency domain;
Determine that DDS transmission opportunity idle in described a plurality of DDS transmission opportunity is as the current DDS transmission opportunity of current device;
In described current DDS transmission opportunity, send the current DDS of described current device.
2. the method for claim 1, is characterized in that, in described definite described a plurality of DDS transmission opportunitys, the DDS transmission opportunity of free time comprises as the current DDS transmission opportunity of current device:
Determine that the idle DDS transmission opportunity of described base station assigns is as described current DDS transmission opportunity; Or
By scanning one or more described DDS transmission cycles, obtain idle DDS transmission opportunity as described current DDS transmission opportunity; Or
In the described DDS transmission cycle sending according to described base station, the occupied information of DDS transmission opportunity is determined described current DDS transmission opportunity.
3. method as claimed in claim 1 or 2, it is characterized in that, described current DDS carries the leading Preamble sequence for the random access base station of described current device, in Preamble sequence described in described current DDS for current DDS described in other device discoveries.
4. a searching method for device discovery signal, is characterized in that, comprising:
Determine the device discovery signal DDS transmission cycle of search cell and the DDS frequency domain resource of search cell, wherein, described DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of described a plurality of DDS transmission opportunitys, a DDS transmission opportunity is only carried a DDS, in described DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time-domain, on frequency domain, only take described DDS frequency domain resource, described search cell is second Serving cell at equipment place and/or the neighbor cell of described Serving cell,
In described a plurality of DDS transmission opportunitys, search for DDS, wherein, described DDS is that the first equipment sends;
According to described DDS, realize the discovery to described the first equipment.
5. method as claimed in claim 4, is characterized in that, also comprises:
Described in described a plurality of DDS transmission opportunitys, search for DDS before, determine that described search cell is for the leading Preamble sequence of described DDS, described Preamble sequence is for when described DDS carries described Preamble sequence, and the second equipment determines according to the signal receiving in the DDS transmission opportunity of search and the correlation peak of described Preamble sequence whether the signal receiving in the DDS transmission opportunity of described search is described DDS.
6. method as claimed in claim 4, is characterized in that, comprising:
Described search cell is determined according to the service conditions of described the second equipment by described the second equipment; Or
Described search cell is determined by described Serving cell.
7. method as claimed in claim 4, is characterized in that, describedly in described a plurality of DDS transmission opportunitys, searches for DDS and comprises:
Search for described DDS to the DDS transmission opportunity before maximum DDS transmission opportunity the zero hour from described DDS transmission cycle in described a plurality of DDS transmission opportunitys, described maximum DDS transmission opportunity refers in a described DDS transmission cycle, last the occupied DDS transmission opportunity starting the zero hour from described DDS transmission cycle.
8. method as claimed in claim 4, is characterized in that, describedly in described a plurality of DDS transmission opportunitys, searches for DDS and comprises:
According to the situation that takies of DDS transmission opportunity, in described a plurality of DDS transmission opportunitys, in occupied DDS transmission opportunity, search for described DDS.
9. method as claimed in claim 5, is characterized in that, describedly in described a plurality of DDS transmission opportunitys, searches for DDS and comprises:
The correlation peak of the signal that obtains described Preamble sequence and receive in the DDS transmission opportunity of search;
When described correlation peak is more than or equal to predetermined threshold value, determine in the DDS transmission opportunity of described search and have described DDS.
10. the method as described in claim 4 or 5, is characterized in that, describedly according to described DDS, realizes the discovery of described the first equipment is comprised:
If a described DDS carries the id information of described the first equipment, a described DDS is carried out to demodulating and decoding to obtain id information discovery to described the first equipment with realization of described the first equipment.
11. methods as described in claim 4 or 5, is characterized in that, if described DDS does not carry the id information of described the first equipment, describedly according to described DDS, realize the discovery of described the first equipment is comprised:
To described Serving cell, send the numbering of the DDS transmission opportunity that a described DDS takies;
Receive the id information of described the first equipment that the numbering of the DDS transmission opportunity that described Serving cell takies according to described DDS sends to realize the discovery to described the first equipment.
12. methods as described in claim 4 or 5, is characterized in that, if described DDS does not carry the id information of described the first equipment, describedly according to described DDS, realize the discovery of described the first equipment is comprised:
If described search cell is described neighbor cell, to described neighbor cell, send the numbering of the DDS transmission opportunity that described DDS takies;
Receive described neighbor cell according to id information discovery to described the first equipment with realization of described first equipment of the numbering transmission of described DDS transmission opportunity, wherein, the id information of described the first equipment is that described neighbor cell directly sends to described the second equipment, or the id information of described the first equipment is that described neighbor cell sends to described the second equipment by described Serving cell.
The method for configuring transmission resource of 13. 1 kinds of device discovery signals, is characterized in that, comprising:
Determine the device discovery signal DDS frequency domain resource of base station, described DDS frequency domain resource is for transmitting the DDS of the equipment of the described base station of access;
Determine the DDS transmission cycle of described base station;
Described DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, wherein, any two quadratures in time of described a plurality of DDS transmission opportunitys, a DDS transmission opportunity is only carried a DDS, in described DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, only takies described DDS frequency domain resource in frequency domain resource;
To the equipment of the described base station of access, send the information of described a plurality of DDS transmission opportunitys.
14. methods as claimed in claim 13, is characterized in that, the DDS transmission cycle of described definite described base station comprises:
Determine that the time cycle of making an appointment is described DDS transmission cycle; Or
According to the quantity of the access device of described base station, determine described DDS transmission cycle; Or
According to the quantity of the access device of described base station and time cycle of making an appointment, determine described DDS transmission cycle.
15. methods as claimed in claim 14, is characterized in that, the DDS transmission cycle of described definite described base station comprises: determine that described DDS transmission cycle is 2 nms, wherein, described 2 nfor being more than or equal to the smallest positive integral of M, M is the equipment sum of described base station access.
16. methods as claimed in claim 14, is characterized in that, described definite DDS transmission cycle comprises: determine that described DDS transmission cycle is max (2 n, X) ms, wherein, described 2 nfor being more than or equal to the smallest positive integral of M, M is the equipment sum of described base station access, described X be one predetermined time periodic quantity.
17. methods as claimed in claim 13, is characterized in that,
Described a plurality of DDS transmission opportunity is continuous in time; Or
Described a plurality of DDS transmission opportunity is discontinuous in time.
18. methods as claimed in claim 13, is characterized in that, also comprise:
To the equipment of the described base station of access, send the situation that takies of the DDS transmission opportunity in described DDS transmission cycle.
19. methods as claimed in claim 13, is characterized in that, also comprise:
Equipment to the described base station of access sends the information of described DDS transmission cycle and/or the information of described DDS frequency domain resource.
20. methods as claimed in claim 13, is characterized in that, also comprise:
Determine that described base station is for the leading Preamble sequence of DDS, described Preamble sequence is for search equipment search DDS.
21. 1 kinds of equipment, is characterized in that, comprising:
Determining unit, determine device discovery signal DDS transmission cycle and the DDS frequency domain resource of base station, wherein, described DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of described a plurality of DDS transmission opportunitys, a DDS transmission opportunity is only carried a DDS, in described DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time-domain, only takies described DDS frequency domain resource on frequency domain;
Described determining unit is also for determining that the idle DDS transmission opportunity of described a plurality of DDS transmission opportunity is as the current DDS transmission opportunity of current device;
Transmitting element, for sending the current DDS of described current device in described current DDS transmission opportunity.
22. equipment as claimed in claim 21, is characterized in that,
Described determining unit specifically for the idle DDS transmission opportunity of determining described base station assigns as described current DDS transmission opportunity; Or
Described determining unit is specifically for obtaining idle DDS transmission opportunity as described current DDS transmission opportunity by scanning one or more described DDS transmission cycles; Or
Described determining unit is determined described current DDS transmission opportunity specifically for the occupied information of DDS transmission opportunity in the described DDS transmission cycle sending according to described base station.
23. equipment as described in claim 21 or 22, it is characterized in that, described current DDS carries the leading Preamble sequence for the random access base station of described current device, in Preamble sequence described in described current DDS for current DDS described in other device discoveries.
24. 1 kinds of equipment, is characterized in that, comprising:
Determining unit, for determining the device discovery signal DDS transmission cycle of search cell and the DDS frequency domain resource of search cell, wherein, described DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of described a plurality of DDS transmission opportunitys, a DDS transmission opportunity is only carried a DDS, in described DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time-domain, on frequency domain, only take described DDS frequency domain resource, described search cell is the Serving cell at described equipment place and/or the neighbor cell of described Serving cell,
Search unit, for search for DDS in described a plurality of DDS transmission opportunitys, wherein, a described DDS is that the first equipment sends;
Find unit, for realizing the discovery to described the first equipment according to described DDS.
25. equipment as claimed in claim 24, it is characterized in that, described determining unit is also for determining that described search cell is for the leading Preamble sequence of described DDS, described Preamble sequence is for when described DDS carries described Preamble sequence, and described equipment determines according to the signal receiving in the DDS transmission opportunity of search and the correlation peak of described Preamble sequence whether the signal receiving in the DDS transmission opportunity of described search is described DDS.
26. equipment as claimed in claim 24, is characterized in that, comprising:
Described search cell is determined according to the service conditions of described equipment by described equipment; Or
Described search cell is determined by described Serving cell.
27. equipment as claimed in claim 24, it is characterized in that, described search unit is specifically for searching for a described DDS to the DDS transmission opportunity before maximum DDS transmission opportunity the zero hour from described DDS transmission cycle in described a plurality of DDS transmission opportunitys, described maximum DDS transmission opportunity refers in a described DDS transmission cycle, last the occupied DDS transmission opportunity starting the zero hour from described DDS transmission cycle.
28. equipment as claimed in claim 24, is characterized in that, described search unit specifically for searching for a described DDS in described a plurality of DDS transmission opportunitys in occupied DDS transmission opportunity according to the situation that takies of DDS transmission opportunity.
29. equipment as claimed in claim 25, is characterized in that, described search unit also comprises:
Obtain subelement, for obtaining the correlation peak of the signal that receives in described Preamble sequence and DDS transmission opportunity in search;
Determine subelement, for determining in the DDS transmission opportunity of described search, have described DDS when described correlation peak is more than or equal to predetermined threshold value.
30. equipment as described in claim 24 or 25, it is characterized in that, if described DDS carries the id information of described the first equipment, described discovery unit is specifically for carrying out demodulating and decoding to obtain id information discovery to described the first equipment with realization of described the first equipment to described DDS.
31. equipment as described in claim 24 or 25, is characterized in that, if described DDS does not carry the ID of the equipment that sends described DDS:
Described discovery unit is specifically for the numbering of the DDS transmission opportunity that sends described DDS to described Serving cell and take;
Described discovery unit concrete also for the id information that receives described the first equipment that the numbering of the DDS transmission opportunity that described Serving cell takies according to described DDS sends to realize the discovery to described the first equipment.
32. equipment as described in claim 24 or 25, is characterized in that, if described DDS does not carry the ID of the equipment that sends described DDS:
If described discovery unit is described neighbor cell specifically for described search cell, to described neighbor cell, send the numbering of the DDS transmission opportunity that described DDS takies;
Described discovery unit is concrete also for receiving described neighbor cell according to id information discovery to described the first equipment with realization of described first equipment of the numbering transmission of described DDS transmission opportunity, wherein, the id information of described the first equipment is that described neighbor cell directly sends to described equipment, or the id information of described the first equipment is that described neighbor cell sends to described equipment by described Serving cell.
33. 1 kinds of base stations, is characterized in that, comprising:
Determining unit, for determining the device discovery signal DDS frequency domain resource of described base station, described DDS frequency domain resource is for transmitting the DDS of the equipment of the described base station of access;
Described determining unit is also for determining the DDS transmission cycle of described base station;
Division unit, for described DDS transmission cycle is divided into a plurality of DDS transmission opportunitys in time, any two quadratures in time of described a plurality of DDS transmission opportunitys, a DDS transmission opportunity is only carried a DDS, in a described DDS transmission cycle, the DDS of an equipment only takies a DDS transmission opportunity in time, only takies described DDS frequency domain resource in frequency domain resource;
Transmitting element, for the information of the described a plurality of DDS transmission opportunitys of equipment transmission to the described base station of access.
34. base stations as claimed in claim 33, is characterized in that,
Described determining unit is specifically for determining that the time cycle of making an appointment is described DDS transmission cycle; Or
Described determining unit is specifically for determining described DDS transmission cycle according to the quantity of the access device of described base station; Or
Described determining unit is specifically for determining described DDS transmission cycle according to the quantity of the access device of described base station and the time cycle of making an appointment.
35. base stations as claimed in claim 34, is characterized in that, described determining unit is specifically for determining that described DDS transmission cycle is 2 nms, wherein, described 2 nfor being more than or equal to the smallest positive integral of M, the equipment sum that M is the described base station of access.
36. base stations as claimed in claim 34, is characterized in that, described determining unit is specifically for determining that described DDS transmission cycle is max (2 n, X) ms, wherein, described 2 nfor being more than or equal to the smallest positive integral of M, M is the equipment sum of the described base station of access, described X be one predetermined time periodic quantity.
37. base stations as claimed in claim 34, is characterized in that,
Described a plurality of DDS transmission opportunity is continuous in time; Or
Described a plurality of DDS transmission opportunity is discontinuous in time.
38. base stations as claimed in claim 33, is characterized in that, described transmitting element also sends the situation that takies of the DDS transmission opportunity in described DDS transmission cycle for the equipment to the described base station of access.
39. base stations as claimed in claim 33, is characterized in that, described transmitting element also sends the information of described DDS transmission cycle and/or the information of described DDS frequency domain resource for the equipment to the described base station of access.
40. base stations as claimed in claim 33, is characterized in that, described determining unit is also for determining that described base station is for the leading Preamble sequence of DDS, and described Preamble sequence is for search equipment search DDS.
CN201210326440.7A 2012-09-06 2012-09-06 Method, device and base station for device discovery signal transmission Pending CN103686746A (en)

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