CN105474725B - A kind of method and apparatus of transmitting random access preamble - Google Patents
A kind of method and apparatus of transmitting random access preamble Download PDFInfo
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- CN105474725B CN105474725B CN201480031489.7A CN201480031489A CN105474725B CN 105474725 B CN105474725 B CN 105474725B CN 201480031489 A CN201480031489 A CN 201480031489A CN 105474725 B CN105474725 B CN 105474725B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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Abstract
The embodiment of the present invention provides a kind of method and apparatus of transmitting random access preamble, is related to the communications field, improves the resource utilization of random access channel.This method comprises: receiving leading configuration information and resource allocation information that network side equipment is sent, the frequency bandwidth of the resource that can be used in transmitting random access preamble of the resource allocation information instruction is at leastA Physical Resource Block,For integer, andRandom access preamble is generated according to the leading configuration information；The resource for being used for transmission the random access preamble is determined according to the resource allocation information, and utilizes random access preamble described in the resource transmission；The frequency bandwidth of the resource for being used for transmission random access preamble isA Physical Resource Block, it is describedA Physical Resource Block includesA subcarrier, For integer, Δ fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz.The embodiment of the present invention is used for transmission random access preamble.
Description
Technical field
The present invention relates to the communications field more particularly to a kind of methods and apparatus of transmitting random access preamble.
Background technique
In a communications system, base station is before establishing communication connection with user equipment, under establishing first with the user equipment
Row synchronizes, so that the user equipment initiates random access to the base station, wherein the random access that base station is sent according to user equipment
Leading determining reception power and time, then the base station sends random access response to user equipment, and instruction user equipment is next
The power of transmitting and time only obtain down-going synchronous and uplink synchronous, user equipment and base station to establish uplink synchronous
Between could establish communication connection.
Wherein, random access preamble in the prior art is made of leader sequence and cyclic prefix, the length of the leader sequence
Degree is 839, and map to 839 subcarriers, subcarrier spacing 1.25KHz, and both sides has 12/13 subcarrier width respectively
Protection band, altogether occupy 864 subcarriers frequency bandwidth.Currently, the leader sequence of random access preamble has occupancy altogether
Frequency bandwidth is 1.25KHz*864=1.08MHz, and therefore, the frequency spectrum resource for being used for transmission the random access preamble is at least 6
Physical Resource Block, the frequency bandwidth of a Physical Resource Block are 180KHz.In addition, for the use in the less place of shelter
Family equipment can achieve good random access effect using above-mentioned random access preamble.
But for some M2M (Machine in the place that basement or mountain area even depth block
Machine communication, machine communication) terminal due to the increase of shelter blocked with transmission range leads to this
Penetration loss and signal decaying during M2M terminal transmission random access preamble increase, in this way, existing random access preamble
Covering power completes random access insufficient for the M2M terminal, and the covering refers to that the random access preamble can be transmitted
Reach range.In order to support M2M communication, need to consider the coverage enhancement of random access.In the prior art it is contemplated that
Random access preamble is repeated, but this repetition will lead to excessively high resource overhead.For example, increasing to reach the covering of 20dB
By force, it may be necessary to repeat 200 random access preambles, this is almost unacceptable in the implementation.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus of transmitting random access preamble, to solve to exist in the prior art
When considering the coverage enhancement of random access, the excessively high problem of resource overhead.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
In a first aspect, providing a kind of user equipment, the user equipment includes:
Receiving unit, it is described leading for receiving the leading configuration information and resource allocation information of network side equipment transmission
Configuration information indicates the parameter for generating random access preamble, and the resource allocation information instruction can be used in transmission and connect at random
Enter leading resource；Wherein, the frequency bandwidth of the resource that can be used in transmitting random access preamble is at leastIt is a
Physical Resource Block,For integer, and
Processing unit, the leading configuration information for being received according to the receiving unit generate random access preamble；
According to the resource allocation information that the receiving unit receives, the money for being used for transmission the random access preamble is determined
Source；
Transmission unit, for utilizing random access preamble described in the resource transmission；
Wherein, the frequency bandwidth of the resource for being used for transmission random access preamble isA Physical Resource Block, institute
It statesA Physical Resource Block includesA subcarrier, For integer,
ΔfRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
In the first possible implementation of the first aspect, the leading configuration information instruction is random for generating
The parameter of access lead includes leading format index, and the leading format indexes corresponding one group of leading format, and described one group leading
Format includes at least two leading formats, wherein every kind of leading format indicates the time domain of leader sequence in random access preamble
Duration TSEQAnd the temporal duration T of cyclic prefixCP；
The leading configuration information that the processing unit is received according to the receiving unit generates random access preamble, packet
It includes:
The first leading format is determined in one group of leading format, and is generated and met the random of the described first leading format
Access lead；Wherein, the T of the described first leading format instructionSEQMeet following condition:N is positive integer.
In the second possible implementation of the first aspect, the leading configuration information instruction is random for generating
The parameter of access lead includes one group of leading format index, and one group of leading format indexes corresponding one group of leading format, wherein
One group of leading format index contains at least two leading format index, and a kind of each leading corresponding leading lattice of format index
Formula, every kind of leading format indicate the temporal duration T of leader sequence in random access preambleSEQAnd cyclic prefix when
Domain duration TCP；
The leading configuration information that the processing unit is received according to the receiving unit generates random access preamble, packet
It includes:
The first leading format is determined in one group of leading format, and is generated and met the random of the described first leading format
Access lead；Wherein, the T of the described first leading format instructionSEQMeet following condition:N is positive integer.
The possible implementation of first or second kind with reference to first aspect, in the third possible implementation, when
When the user equipment determines random access failure, the processing unit is also used to:
The second leading format is determined in one group of leading format, and is generated and met the second of the described second leading format
Random access preamble；Wherein, the T of the described second leading format instructionSEQMeet following condition:M is greater than N
Integer；
According to the resource allocation information, the resource for being used for transmission second random access preamble is determined；
The transmission unit is also used to, and utilizes the second random access preamble described in the resource transmission.
Any possible implementation of first with reference to first aspect into the third possible implementation,
In four kinds of possible implementations, the processing unit is also used to, and the first leading format is determined in one group of leading format
Before, and/or, in one group of leading format determine the second leading format before,
Determine the channel quality information between user equipment and network side equipment；
The processing unit determines the first leading format in one group of leading format, and/or, it is described at described one group
The second leading format is determined in leading format, comprising:
According to the channel quality information between the user equipment and network side equipment, the first leading format is determined；And/or
According to the channel quality information between the user equipment and network side equipment, the second leading format is determined.
Any possible implementation into the 4th kind of possible implementation of first aspect with reference to first aspect,
In a fifth possible implementation, the parameter for generating random access preamble of the leading configuration information instruction includes
Root sequence index, wherein the value range of described sequence index are as follows: [0, NZC- 2], NZCFor less than or equal toLargest prime number, wherein fGI≥30KHz；
The leading configuration information that the processing unit is received according to the receiving unit generates random access preamble, packet
It includes:
According to described sequence index, root ZC sequence is generated, the sequence length of described ZC sequence is NZC；
According to described ZC sequence, random access preamble is generated.
Any possible implementation into the 5th kind of possible implementation of first aspect with reference to first aspect,
In a sixth possible implementation,
ΔfRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
The 6th kind of possible implementation with reference to first aspect, in the 7th kind of possible implementation, the resource
Configuration information is one or more Physical Resource Block indexes, wherein each Physical Resource Block index one Physical Resource Block of instruction.
Second aspect, provides a kind of network side equipment, and the network side equipment includes:
Transmission unit, it is described leading with confidence for sending leading configuration information and resource allocation information to user equipment
Breath indicates the parameter for generating random access preamble, and the resource allocation information instruction can be used in transmitting random access preamble
Resource；Wherein, the frequency bandwidth of the resource that can be used in transmitting random access preamble is at leastA physics money
Source block,For integer, and
Receiving unit is for receiving the user equipment in frequency bandwidthThe resource of a Physical Resource Block uploads
The defeated random access preamble；
Wherein, describedA Physical Resource Block includesA subcarrier, For integer, Δ fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
In the first possible implementation of the second aspect, the leading configuration information instruction is random for generating
The parameter of access lead includes leading format index, and the leading format indexes corresponding one group of leading format, and described one group leading
Format includes at least two leading formats, wherein every kind of leading format indicates the time domain of leader sequence in random access preamble
Duration TSEQAnd the temporal duration T of cyclic prefixCP；
Wherein, the random access preamble meets the first leading format, the T of the first leading format instructionSEQMeet such as
Lower condition:N is positive integer.
In a second possible implementation of the second aspect, the leading configuration information instruction is random for generating
The parameter of access lead includes one group of leading format index, and one group of leading format indexes corresponding one group of leading format, wherein
One group of leading format index contains at least two leading format index, and a kind of each leading corresponding leading lattice of format index
Formula, every kind of leading format indicate the temporal duration T of leader sequence in random access preambleSEQAnd cyclic prefix when
Domain duration TCP；
Wherein, the random access preamble meets the first leading format, the T of the first leading format instructionSEQMeet such as
Lower condition:N is positive integer.
In conjunction with second aspect to second aspect second of possible implementation in any possible implementation,
In the third possible implementation, the parameter for generating random access preamble of the leading configuration information instruction includes
Root sequence index, wherein the value range of described sequence index are as follows: [0, NZC- 2], NZCFor less than or equal toLargest prime number, wherein fGI≥30KHz。
In conjunction with second aspect to second aspect the third possible implementation in any possible implementation,
In the fourth possible implementation,ΔfRA=600Hz or Δ fRA=
625Hz。
In conjunction with the 4th kind of possible implementation of second aspect, in a fifth possible implementation, the resource
Configuration information is one or more Physical Resource Block indexes, wherein each Physical Resource Block index one Physical Resource Block of instruction.
The third aspect, provides a kind of method of transmitting random access preamble, and the random access preamble includes leader sequence
And cyclic prefix, random access preamble described in user device transmissions is to initiate random access, which comprises
Leading configuration information and resource allocation information that network side equipment is sent are received, the leading configuration information instruction is used
In the parameter for generating random access preamble, the resource allocation information instruction can be used in the resource of transmitting random access preamble；
Wherein, the frequency bandwidth of the resource that can be used in transmitting random access preamble is at leastA Physical Resource Block,For integer, and
According to the leading configuration information, random access preamble is generated；
According to the resource allocation information, the resource for being used for transmission the random access preamble is determined, and utilize the money
Transmit the random access preamble in source；
Wherein, the frequency bandwidth of the resource for being used for transmission the random access preamble isA physical resource
Block, it is describedA Physical Resource Block includesA subcarrier, For
Integer, Δ fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
In the first possible implementation of the third aspect, the leading configuration information instruction is random for generating
The parameter of access lead includes leading format index, and the leading format indexes corresponding one group of leading format, and described one group leading
Format includes at least two leading formats, wherein every kind of leading format indicates the time domain of leader sequence in random access preamble
Duration TSEQAnd the temporal duration T of cyclic prefixCP；
It is described according to the leading configuration information, generate random access preamble, comprising:
The first leading format is determined in one group of leading format, and is generated and met the random of the described first leading format
Access lead；Wherein, the T of the described first leading format instructionSEQMeet following condition:N is positive integer.
In the second possible implementation of the third aspect, the leading configuration information instruction is random for generating
The parameter of access lead includes one group of leading format index, and one group of leading format indexes corresponding one group of leading format, wherein
One group of leading format index contains at least two leading format index, and a kind of each leading corresponding leading lattice of format index
Formula, every kind of leading format indicate the temporal duration T of leader sequence in random access preambleSEQAnd cyclic prefix when
Domain duration TCP；
It is described according to the leading configuration information, generate random access preamble, comprising:
The first leading format is determined in one group of leading format, and is generated and met the random of the described first leading format
Access lead；Wherein, the T of the described first leading format instructionSEQMeet following condition:N is positive integer.
In conjunction with the possible implementation of first or second kind of the third aspect, in the third possible implementation, when
When the user equipment determines random access failure, the method also includes:
The second leading format is determined in one group of leading format, and is generated and met the second of the described second leading format
Random access preamble；Wherein, the T of the described second leading format instructionSEQMeet following condition:M is greater than N
Integer；
According to the resource allocation information, the resource for being used for transmission second random access preamble is determined, and utilize institute
State the second random access preamble described in resource transmission.
In conjunction with first any possible implementation into the third possible implementation of the third aspect,
In four kinds of possible implementations, before determining the first leading format in one group of leading format, and/or, described one
Before determining the second leading format in the leading format of group, the method also includes:
Determine the channel quality information between user equipment and network side equipment；
The first leading format determining in one group of leading format, and/or, it is described in one group of leading format
The leading format of middle determination second, comprising:
According to the channel quality information between the user equipment and network side equipment, the first leading format is determined；And/or
According to the channel quality information between the user equipment and network side equipment, the second leading format is determined.
In conjunction with the third aspect first to fourth kind of possible implementation in any possible implementation,
In five kinds of possible implementations, the leading configuration information instruction includes root sequence for generating the parameter of random access preamble
Column index, wherein the value range of described sequence index are as follows: [0, NZC- 2], NZCFor less than or equal toLargest prime number, wherein fGI≥30KHz；
It is described according to the leading configuration information, generate random access preamble, comprising:
According to described sequence index, root ZC sequence is generated, the sequence length of described ZC sequence is NZC；
According to described ZC sequence, random access preamble is generated.
In conjunction with the third aspect first to the 5th kind of possible implementation in any possible implementation,
In six kinds of possible implementations,ΔfRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
In conjunction with the 6th kind of possible implementation of the third aspect, in the 7th kind of possible implementation, the resource
Configuration information is one or more Physical Resource Block indexes, wherein each Physical Resource Block index one Physical Resource Block of instruction.
Fourth aspect, provides a kind of method of transmitting random access preamble, and the random access preamble includes leader sequence
And cyclic prefix, random access preamble described in user device transmissions is to initiate random access, which is characterized in that the method packet
It includes:
Leading configuration information and resource allocation information are sent to user equipment, the leading configuration information instruction is for generating
The parameter of random access preamble, the resource allocation information instruction can be used in the resource of transmitting random access preamble；Wherein, institute
The frequency bandwidth for stating the resource that can be used in transmitting random access preamble is at leastA Physical Resource Block,It is whole
Number, and
The user equipment, which is received, in frequency bandwidth isThe transmitted over resources of a Physical Resource Block it is described random
Access lead；
Wherein, describedA Physical Resource Block includesA subcarrier, For integer, Δ fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
In the first possible implementation of the fourth aspect, the leading configuration information instruction is random for generating
The parameter of access lead includes leading format index, and the leading format indexes corresponding one group of leading format, and described one group leading
Format includes at least two leading formats, wherein every kind of leading format indicates the time domain of leader sequence in random access preamble
Duration TSEQAnd the temporal duration T of cyclic prefixCP；
Wherein, the random access preamble meets the first leading format, the T of the first leading format instructionSEQMeet such as
Lower condition:N is positive integer.
In the second possible implementation of the fourth aspect, the leading configuration information instruction is random for generating
The parameter of access lead includes one group of leading format index, and one group of leading format indexes corresponding one group of leading format, wherein
One group of leading format index contains at least two leading format index, and a kind of each leading corresponding leading lattice of format index
Formula, every kind of leading format indicate the temporal duration T of leader sequence in random access preambleSEQAnd cyclic prefix when
Domain duration TCP；
Wherein, the random access preamble meets the first leading format, the T of the first leading format instructionSEQMeet such as
Lower condition:N is positive integer.
In conjunction with fourth aspect to fourth aspect second of possible implementation in any possible implementation,
In the third possible implementation, the parameter for generating random access preamble of the leading configuration information instruction includes
Root sequence index, wherein the value range of described sequence index are as follows: [0, NZC- 2], NZCFor less than or equal toLargest prime number, wherein fGI≥30KHz。
In conjunction with fourth aspect to fourth aspect the third possible implementation in any possible implementation,
In the fourth possible implementation,ΔfRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
In conjunction with the 4th kind of possible implementation of fourth aspect, in a fifth possible implementation, the resource
Configuration information is one or more Physical Resource Block indexes, wherein each Physical Resource Block index one Physical Resource Block of instruction.
5th aspect, provides a kind of user equipment, and the user equipment includes: bus and is connected to the bus
Processor, memory and interface；The memory is for storing instruction；The processor executes described instruction and is used for:
Leading configuration information and resource allocation information that network side equipment is sent are received, the leading configuration information instruction is used
In the parameter for generating random access preamble, the resource allocation information instruction can be used in the resource of transmitting random access preamble；
Wherein, the frequency bandwidth of the resource that can be used in transmitting random access preamble is at leastA Physical Resource Block,For integer, and
According to the leading configuration information, random access preamble is generated；
According to the resource allocation information, the resource for being used for transmission the random access preamble is determined, and utilize the money
Transmit the random access preamble in source；
Wherein, the frequency bandwidth of the resource for being used for transmission random access preamble isA Physical Resource Block, institute
It statesA Physical Resource Block includesA subcarrier, For integer,
ΔfRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
In the first possible implementation of the 5th aspect, the leading configuration information instruction is used to generate at random
The parameter of access lead includes leading format index, and the leading format indexes corresponding one group of leading format, and described one group leading
Format includes at least two leading formats, wherein every kind of leading format indicates the time domain of leader sequence in random access preamble
Duration TSEQAnd the temporal duration T of cyclic prefixCP；
It is described according to the leading configuration information, generate random access preamble, comprising:
The first leading format is determined in one group of leading format, and is generated and met the random of the described first leading format
Access lead；Wherein, the T of the described first leading format instructionSEQMeet following condition:N is positive integer.
In second of possible implementation of the 5th aspect, the leading configuration information instruction is used to generate at random
The parameter of access lead includes one group of leading format index, and one group of leading format indexes corresponding one group of leading format, wherein
One group of leading format index contains at least two leading format index, and a kind of each leading corresponding leading lattice of format index
Formula, every kind of leading format indicate the temporal duration T of leader sequence in random access preambleSEQAnd cyclic prefix when
Domain duration TCP；
It is described according to the leading configuration information, generate random access preamble, comprising:
The first leading format is determined in one group of leading format, and is generated and met the random of the described first leading format
Access lead；Wherein, the T of the described first leading format instructionSEQMeet following condition:N is positive integer.
In conjunction with the possible implementation of first or second kind of the 5th aspect, in the third possible implementation, when
When the user equipment determines random access failure, the processor executes described instruction and is also used to:
The second leading format is determined in one group of leading format, and is generated and met the second of the described second leading format
Random access preamble；Wherein, the T of the described second leading format instructionSEQMeet following condition:M is greater than N
Integer；
According to the resource allocation information, the resource for being used for transmission second random access preamble is determined, and utilize institute
State the second random access preamble described in resource transmission.
In conjunction with first any possible implementation into the third possible implementation of the 5th aspect, the
In four kinds of possible implementations, before determining the first leading format in one group of leading format, and/or, described one
Before determining the second leading format in the leading format of group, the processor executes described instruction and is also used to:
Determine the channel quality information between user equipment and network side equipment；
The first leading format determining in one group of leading format, and/or, it is described in one group of leading format
The leading format of middle determination second, comprising:
According to the channel quality information between the user equipment and network side equipment, the first leading format is determined；And/or
According to the channel quality information between the user equipment and network side equipment, the second leading format is determined.
In conjunction with the 5th aspect to the 5th aspect the 4th kind of possible implementation in any possible implementation,
In a fifth possible implementation, the parameter for generating random access preamble of the leading configuration information instruction includes
Root sequence index, wherein the value range of described sequence index are as follows: [0, NZC- 2], NZCFor less than or equal toLargest prime number, wherein fGI≥30KHz；
It is described according to the leading configuration information, generate random access preamble, comprising:
According to described sequence index, root ZC sequence is generated, the sequence length of described ZC sequence is NZC；
According to described ZC sequence, random access preamble is generated.
In conjunction with the 5th aspect to the 5th aspect the 5th kind of possible implementation in any possible implementation,
In a sixth possible implementation,ΔfRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
In conjunction with the 6th kind of possible implementation of the 5th aspect, in the 7th kind of possible implementation, the resource
Configuration information is one or more Physical Resource Block indexes, wherein each Physical Resource Block index one Physical Resource Block of instruction.
6th aspect, provides a kind of network side equipment, and the network side equipment includes: bus and is connected to described total
Processor, memory and the interface of line；The memory is for storing instruction；The processor executes described instruction and is used for:
Leading configuration information and resource allocation information are sent to user equipment, the leading configuration information instruction is for generating
The parameter of random access preamble, the resource allocation information instruction can be used in the resource of transmitting random access preamble；Wherein, institute
The frequency bandwidth for stating the resource that can be used in transmitting random access preamble is at leastA Physical Resource Block,It is whole
Number, and
The user equipment, which is received, in frequency bandwidth isThe transmitted over resources of a Physical Resource Block it is described random
Access lead；
Wherein, describedA Physical Resource Block includesA subcarrier, For integer, Δ fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
In the first possible implementation of the 6th aspect, the leading configuration information instruction is used to generate at random
The parameter of access lead includes leading format index, and the leading format indexes corresponding one group of leading format, and described one group leading
Format includes at least two leading formats, wherein every kind of leading format indicates the time domain of leader sequence in random access preamble
Duration TSEQAnd the temporal duration T of cyclic prefixCP；
Wherein, the random access preamble meets the first leading format, the T of the first leading format instructionSEQMeet such as
Lower condition:N is positive integer.
In second of possible implementation of the 6th aspect, the leading configuration information instruction is used to generate at random
The parameter of access lead includes one group of leading format index, and one group of leading format indexes corresponding one group of leading format, wherein
One group of leading format index contains at least two leading format index, and a kind of each leading corresponding leading lattice of format index
Formula, every kind of leading format indicate the temporal duration T of leader sequence in random access preambleSEQAnd cyclic prefix when
Domain duration TCP；
Wherein, the random access preamble meets the first leading format, the T of the first leading format instructionSEQMeet such as
Lower condition:N is positive integer.
In conjunction with the 6th aspect to the 6th aspect second of possible implementation in any possible implementation,
In the third possible implementation, the parameter for generating random access preamble of the leading configuration information instruction includes
Root sequence index, wherein the value range of described sequence index are as follows: [0, NZC- 2], NZCFor less than or equal toLargest prime number, wherein fGI≥30KHz。
In conjunction with the 6th aspect to the 6th aspect the third possible implementation in any possible implementation,
In the fourth possible implementation,ΔfRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
In conjunction with the 4th kind of possible implementation of the 6th aspect, in a fifth possible implementation, the resource
Configuration information is one or more Physical Resource Block indexes, wherein each Physical Resource Block index one Physical Resource Block of instruction.
Using the above scheme, design is optimized to the subcarrier spacing of random access channel and frequency bandwidth, with
The prior art is compared using the subcarrier spacing of 1.25KHz and the frequency bandwidth of 6PRB, and the subcarrier spacing in the present invention is more
Small, frequency bandwidth is narrower, therefore, using scheme provided in an embodiment of the present invention, can at least obtain it is following the utility model has the advantages that
1, on the one hand smaller subcarrier spacing can promote the power spectral density of random access preamble, on the other hand may be used
To guarantee the detection performance of random access preamble, to achieve the effect that coverage enhancement.
2, narrower frequency bandwidth can save the frequency spectrum resource expense of random access preamble, to promote the utilization of resources
Rate.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without creative efforts, it can also be obtained according to these attached drawings others
Attached drawing.
Fig. 1 is a kind of flow diagram of the method for transmitting random access preamble provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of leader sequence provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another leader sequence provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another leader sequence provided in an embodiment of the present invention；
Fig. 5 is a kind of flow diagram of the method for another transmitting random access preamble provided in an embodiment of the present invention；
Fig. 6 is a kind of structural schematic diagram of user equipment provided in an embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram of network side equipment provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of another user equipment provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of another network side equipment provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The technical solution that following embodiment of the present invention provides can be applied to cordless communication network, such as: long term evolution
(long term evolution, referred to as LTE) system, advanced long term evolution (long term evolution
Advanced, referred to as LTE-A) system and its further evolvement network.
It may include base station (base station, referred to as BS) and user equipment (user in cordless communication network
Equipment, referred to as UE).Wherein, base station can be with user equipment or other communication sites such as relay, led to
The equipment of letter.Base station can provide the communication overlay of specific physical region.For example, base station specifically can be with the evolved base in LTE
Stand (evolutional node B, referred to as ENB or eNodeB)；Alternatively, the offer being also possible in cordless communication network connects
Enter other access network equipments of service.
In embodiments of the present invention, UE can be distributed in entire wireless network, and each UE can be static or mobile
's.UE is properly termed as terminal (terminal), mobile station (mobile station), subscriber unit (subscriber unit),
Platform (station) etc..UE is specifically as follows cellular phone (cellular phone), personal digital assistant (personal
Digital assistant, referred to as PDA), handheld device (handheld), laptop computer (laptop computer) etc.
Wireless telecom equipment.When UE, which is applied to machinery compartment (Machine to Machine, M2M), to be communicated, UE is properly termed as M2M end
End specifically can be the equipment that intelligent electric meter, intelligent appliance etc. support M2M communication.
The embodiment of the present invention provides a kind of method of transmitting random access preamble, and the executing subject of this method is that user sets
It is standby, as shown in Figure 1, comprising:
S101, user equipment receive leading configuration information and resource allocation information that network side equipment is sent, this is leading to match
Confidence breath indicates the parameter for generating random access preamble, and resource allocation information instruction can be used in front of transmitting random access
The resource led.
Wherein, the frequency bandwidth of the resource that can be used in transmitting random access preamble is at leastA physical resource
Block,For integer, and
It should be noted that in mobile communication system, which is mobile terminal, which is base
It stands, in wider Internet of Things, can be, but not limited to be mobile whole by the both devices that random access establishes communication connection
End and base station understand that the network side equipment of description of the embodiment of the present invention is regarded as base station, user equipment for convenience
It is considered mobile terminal.
S102, the user equipment generate random access preamble according to the leading configuration information.
Wherein, which includes leader sequence and cyclic prefix.
S103, the user equipment determine the resource for being used for transmission the random access preamble according to the resource allocation information, and
Utilize the resource transmission random access preamble.
Wherein, the frequency bandwidth of the resource for being used for transmission random access preamble isA Physical Resource Block, shouldA Physical Resource Block includesA subcarrier, For integer, Δ
fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
For LTE system, which can be " Zadoff-Chu " (abbreviation ZC) sequence.ZC sequence is nonbinary
Unit amplitude sequence meets CAZAC (Constant Amplitude Zero Autocorrelation, constant amplitude zero auto-correlation)
Characteristic.The advantages of CAZAC characteristic is same ZC sequence can produce by cyclic shift (cyclic shift, referred to as CS) it is more
Road orthogonal sequence.Only there is peak value in zero point in the period autocorrelation of ZC sequence.After making circulative shift operation for the ZC sequence,
The cycle dependency of obtained ZC sequence and original ZC sequence is only in NCSThere is peak value, N in placeCSFor the cyclic shift value of ZC sequence.This
So that two ZC sequences produce a zero auto-correlation region (Zero-Correlation Zone).If the zero auto-correlation area
Domain can deal with the maximum time difference transmitted between the two sequences, then the two sequences are exactly the orthogonal sequence of two-way.
ZC sequence can indicate are as follows:
Wherein, u is the root sequence index (root sequence index) of ZC sequence, and also referred to as radical exponent, value can
To be determined by the leading configuration information.NZCFor the length of the ZC sequence, value can be preset, it is preferable that NZCFor matter
Number.Since leader sequence can be mapped on subcarrier, N is presetZCWhen, it is contemplated that need reserved part subcarrier to be used as frequency domain
Protection interval, NZCValue should be less than
Specifically, user equipment can be indexed according to the root of determining ZC sequence, generate root ZC sequence, and be based on root ZC
Sequence makees cyclic shift, obtains multiple leader sequences, and according to the configuration of random access channel, determines the leader sequence used.
When generating random access preamble, it is also necessary to consider the leading format of the random access preamble, which indicates connects at random
Enter the temporal duration T of leading middle leader sequenceSEQAnd the temporal duration T of cyclic prefixCP.The leading format can also
To be indicated by the leading configuration information.
For example, the parameter for generating random access preamble of the leading configuration information instruction includes leading format index,
User equipment, can be corresponding with leading format according to leading format index predetermined after obtaining the leading format index
Relationship, the index of the leading format as defined in agreement and the corresponding table of leading format determine the leading format.It is more detailed to realize
Details can use for reference the prior art in current LTE system, and details are not described herein again.
It should be noted that in scheme provided in an embodiment of the present invention, the subcarrier spacing and frequency of random access channel
Design is optimized in bandwidth.The subcarrier spacing of 1.25KHz and the frequency bandwidth phase of 6PRB are used with the prior art
Than the subcarrier spacing in the embodiment of the present invention is smaller, and frequency bandwidth is narrower.Using scheme provided in an embodiment of the present invention, until
Can obtain less it is following the utility model has the advantages that
1, on the one hand smaller subcarrier spacing can promote the power spectral density of random access preamble, on the other hand may be used
To guarantee the detection performance of random access preamble, to achieve the effect that coverage enhancement.
2, narrower frequency bandwidth can save the frequency spectrum resource expense of random access preamble, to promote the utilization of resources
Rate.
In addition, the covering power due to the random access preamble enhances, then under the scene of same cells radius, the present invention
User equipment can use lower transmission power transmitting random access preamble than in the prior art in embodiment, save electric power
Consumption.
As an alternative embodiment, the leading configuration information instruction connects at random for generating in step S102
Entering leading parameter further includes root sequence index, wherein the value range of the root sequence index are as follows: [0, NZC- 2], NZCFor less than
Or it is equal toLargest prime number, wherein fGI≥30KHz.The user equipment is according to the root sequence rope
Draw, generate root ZC sequence, the sequence length of root ZC sequence is NZC, and according to root ZC sequence, generate random access preamble.
It should be noted that the fGIFor frequency domain protection interval (guide interval, GI), there are many can for specific value
Can, f hereinGI>=30KHz is only a kind of possibility.Preferably, fGIFor Δ fRAIntegral multiple.
Specifically, which can be physics root sequence index, be also possible to logical root sequence index.If the root
Sequence index is logical root sequence index, it is also necessary to preset the mapping of logical root sequence index v Yu physics root sequence index u
Relationship.In this way, logical root sequence index and the mapping relations that user equipment can be indicated according to the leading configuration information,
Determine corresponding physics root sequence index.
The mapping relations can be following formula:
U=((- 1)v[v/2+1])mod NZC
Alternatively, the mapping relations can also be pair of logical root sequence index v predetermined Yu physics root sequence index u
Answer relation table.WithAnd Δ fRAIt, at this time can be with prespecified N for=500HzZCValue be 293, and define such as
Mapping table shown in the following table 1.
In addition, when user equipment makees cyclic shift based on root ZC sequence, cyclic shift value NCSIt can preset, or
It is configured by above-mentioned leading configuration information.When being configured by above-mentioned leading configuration information, circulation can be pre-defined
Shift configuration (such as: the configuration of zero auto-correlation region), with cyclic shift value NCSCorresponding relationship.For example, working as the length of leader sequence
As an example, the corresponding relationship can be as shown in table 2 below when degree is 293.
The mapping table of table 1, logical root sequence index and physics root sequence index
Table 2, NCSConfiguration and NCSThe mapping table of value
| NCSConfiguration | NCSValue |
| 0 | 13 |
| 1 | 15 |
| 2 | 18 |
| 3 | 22 |
| 4 | 26 |
| 5 | 32 |
| 6 | 38 |
| 7 | 46 |
| 8 | 59 |
| 9 | 76 |
| 10 | 93 |
| 11 | 119 |
| 12 | 167 |
| 13 | 279 |
For example, determining the NCSBe configured to 0, correspondingly NCSValue is 13, then each root ZC sequence can be moved by circulation
Position, obtainsA leader sequence.
It should be noted that the root sequence index of leading configuration information instruction can be it is multiple, as described above, the user
Equipment ultimately generates 22 leader sequences according to a root sequence index, if the root sequence rope of the leading configuration information instruction of the logic
Three are cited as, then the user equipment finally produces 66 leader sequences, to meet the needs of different.When specific implementation, before this
Multiple sequence index of the instruction that configuration information can be explicit are led, i.e., what the leading configuration information indicated is used to generate random access
Leading parameter includes multiple sequence index；Alternatively, be also possible to multiple sequence index of implicit instruction, i.e., this leading is matched
The parameter for generating random access preamble of confidence breath instruction includes a root sequence index, but needs other root sequence index
When, it is determined by pre-set sequence index sequence default.
In a kind of optional implementation of the embodiment of the present invention, whenWhen, the resource is matched in step S101
The resource that confidence breath instruction can be used in transmitting random access preamble is at least one Physical Resource Block.Optionally, in step S102
The subcarrier spacing Δ f of the random access preamble of generationRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
Illustratively, subcarrier spacing Δ f is presetRA=500Hz, in this way, due to a PRB (physical resource
Block, Physical Resource Block) frequency domain bandwidth be 180KHz, then just have 360 subcarriers in a PRB, wherein in order to guarantee
Preamble sequence length be less than or equal toPrime number, with fGIFor=30KHz, and guarantee
Certain spreading gain, selectable preamble sequence length be 293,283 or 281 etc. prime numbers, as shown in Fig. 2, this is leading
The length of sequence is 293, then the protection strip length of the leader sequence two sides is respectively 33 and 34.
Optionally, as shown in figure 3, subcarrier spacing is preset as 600Hz, the length of the leader sequence is 251, the leading sequence
The protection strip length for arranging two sides is respectively 24 and 25.
Optionally, as shown in figure 4, subcarrier spacing is preset as 625Hz, the length of the leader sequence is 241, the leading sequence
The protection strip length for arranging two sides is respectively 23 and 24.
It should be noted that the resource allocation information in step S101 is one or more Physical Resource Block indexes, wherein
Each Physical Resource Block index one Physical Resource Block of instruction, before which can be according to preset random access
The quantity concrete configuration for leading the Physical Resource Block of occupancy only takes up one for Fig. 2, Fig. 3 and random access preamble shown in Fig. 4
In the case where a Physical Resource Block, which can be used for transmission for a Physical Resource Block index, unique instruction
One Physical Resource Block of the random access preamble, certainly, the resource allocation information may be multiple Physical Resource Block indexes,
Indicate that multiple Physical Resource Block that can be used for transmitting the random access preamble are randomly choosed for user equipment, the present invention does not do this
It limits.
In addition, Physical Resource Block index can be used to indicate that resource offset, which deviates according to the resource
Amount determines the resource number for being used for transmission the Physical Resource Block of random access preamble.For example, if the number of initial physical resource block
For 0 and the resource offset is 90, then the number for being used for transmission the starting Physical Resource Block of random access preamble is 90.In this way,
For occupying the random access preamble of a Physical Resource Block, which is transmitted using the Physical Resource Block that the number is 90
The random access preamble, for occupying the random access preamble of three Physical Resource Block, which is 90,91 using number
The random access preamble is transmitted with 92 3 Physical Resource Block.
The leader sequence of above-mentioned offer is preferred embodiment provided in an embodiment of the present invention, in a particular application, leading
The setting of sequence can also have other modes, for example, when subcarrier spacing is 500Hz, preamble sequence length 283；Subcarrier
Between when being divided into 600Hz, preamble sequence length is 241 etc., at the same time it can also reduce subcarrier spacing and to shorten leader sequence long
Degree makes the leader sequence occupy two or three Physical Resource Block, will not enumerate herein.
Need further exist for explanation, the temporal duration T of the cyclic prefix in the random access preambleCPWith cell half
Diameter is related, the temporal duration T of leader sequenceSEQIt is related with number of repetition of the leader sequence in random access preamble, this
Sample, according to T in random access preambleCPWith TSEQVarious combination collocation, can define the format of a variety of random access preambles.
Optionally, which generates random access preamble according to leader sequence, at least may include following two reality
Existing mode:
Mode one, step S102 are specifically included, the ginseng for being used to generate random access preamble of the leading configuration information instruction
Number includes that leading format indexes, which indexes corresponding one group of leading format, which includes at least two
Leading format, wherein every kind of leading format indicates the temporal duration T of leader sequence in random access preambleSEQ, and
The temporal duration T of cyclic prefixCP, then the user equipment determines the first leading format in one group of leading format, and raw
At the random access preamble for meeting the first leading format, wherein the T of the first leading format instructionSEQMeet following condition:N is positive integer.
Illustratively, which uses leader sequence as shown in Figure 2, subcarrier spacing 500Hz, sequence length
It is 293, the following table 3 provides the random access preamble of 16 kinds of different-formats:
Table 3
Wherein, shouldSecond.
By upper table 3 it is found that T in different leading formatCPWith TSEQAgeing it is different, wherein different leading formats indexes
It corresponds to and different largest cell radiuses, in a kind of possible implementation of the embodiment of the present invention, leading 1 correspondence of format index
Largest cell radius be 14.53km；It is 29.53km that leading format, which indexes 2 corresponding largest cell radiuses,；Leading format index
3 corresponding largest cell radiuses are 77.34km；It is 100.16km that leading format, which indexes 4 corresponding largest cell radiuses,.It is suitable for
The T of a variety of leading formats of difference of same largest cell radiusCPTime span it is consistent, such as leading format index 1 corresponding 0 to
T in 3 four kinds of leading formatsCPTime span be 27744Ts.For same largest cell radius, different leading formats
Leader sequence number of repetition is different in random access preamble, wherein leading according to this as the leader sequence number of repetition increases
The covering for the random access preamble that format generates enhances (increase of the covering grade index value in corresponding table 3) therewith, described to cover
Lid refers to that the random access preamble can be transferred to the distance range reached.
It should be noted that 5 kinds of different-formats of defined random access preamble, leading format index in the prior art
Respectively 0 to 4, which determines unique lattice according to different largest cell radiuses, by different leading format indexes
The random access preamble of formula, and in the embodiment of the present invention, which indexes according to the leading format that network side equipment is sent,
Can index in the leading format selects a kind of leading format generation to meet connecing at random for the format in corresponding a variety of leading formats
Enter leading carry out random access, implementation is more flexible.
Optionally, before which determines the first leading format in one group of leading format, user equipment is determined
Channel quality information between network side equipment, and the user equipment is according to the channel between the user equipment and network side equipment
Quality information determines the first leading format.
Optionally, for the network side equipment during initiating down-going synchronous to user equipment, user equipment is according to downlink
Can determine the channel quality information between the network side equipment synchronization time, then the user equipment when channel quality is preferable,
Low covering grade may be selected and index corresponding leading format generation random access preamble；When channel quality is poor, height may be selected
The corresponding leading format of covering grade index generates random access preamble, wherein by table 3, as the covering grade in table 3 indexes
The increase of value, the covering power enhancing of the random access preamble of corresponding leading format.In this way, user equipment compared to the prior art
The random access preamble of unique leading format is sent to network side equipment, the embodiment of the present invention improves user equipment random access
Success rate.
In addition, the user equipment can also determine the leading format index corresponding one at random according to the leading format index
The leading format of kind generates random access preamble, can also be with a certain leading format of default choice, such as default choice covering grade rope
The leading format for being cited as 0 generates random access preamble, and which is not limited by the present invention.
In addition, in a kind of possible implementation of the embodiment of the present invention, this is sent out in order to be combined with the prior art
The leading format index for the random access preamble that bright embodiment defines is not the same in the prior art 0 to 4 four kind as 5 to 8
Format is led to combine, as shown in table 4 below:
Table 4
In this way, the user equipment is when determining the value of leading format index is 0 to 4 any, according in the prior art
Definition leading format generate random access preamble；When determining the value of the leading format index is 5 to 8 any, the use
Family equipment can index a kind of leading format of flexible choice in corresponding a variety of leading formats in the leading format and generate random access
It is leading, improve the versatility of the embodiment of the present invention.
Illustratively, which uses leader sequence as shown in Figure 3, subcarrier spacing 600Hz, sequence length
It is 251, the following table 5 provides the random access preamble of 16 kinds of different-formats:
Table 5
It should be noted that 5 kinds of different-formats of defined random access preamble, leading format index in the prior art
Respectively 0 to 4, in order to combine with the prior art, in a kind of possible implementation of the embodiment of the present invention, the present invention is real
The leading format index for applying the random access preamble that example defines is respectively 5 to 8, specifically can refer to the corresponding description of table 4, herein
It repeats no more.
Illustratively, which uses leader sequence as shown in Figure 4, subcarrier spacing 625Hz, sequence length
It is 241, the following table 6 provides the random access preamble of 16 kinds of different-formats:
Table 6
It should be noted that 5 kinds of different-formats of defined random access preamble, leading format index in the prior art
Respectively 0 to 4, in order to combine with the prior art, in a kind of possible implementation of the embodiment of the present invention, the present invention is real
The leading format index for applying the random access preamble that example defines is respectively 5 to 8, specifically can refer to the corresponding description of table 4, herein
It repeats no more.
Mode two, step S102 are specifically included, the ginseng for being used to generate random access preamble of the leading configuration information instruction
Number includes one group of leading format index, this group leading format indexes corresponding one group of leading format, wherein one group of leading format
Index contains at least two leading format index, and a kind of each leading corresponding leading format of format index, every kind of leading format
Indicate the temporal duration T of leader sequence in random access preambleCPAnd the temporal duration T of cyclic prefixCP, then
The user equipment determines the first leading format in one group of leading format, and generates and meet connecing at random for the first leading format
Enter leading；Wherein, the T of the first leading format instructionSEQMeet following condition:N is positive integer.
It should be noted that the setting about leading format is referred to describe accordingly in mode one, mode two and side
Formula one is the difference is that user equipment determines that the mode of leading format is different according to leading format index.
Illustratively, which uses leader sequence as shown in Figure 2, subcarrier spacing 500Hz, sequence length
It is 293, the following table 7 provides the random access preamble of 16 kinds of different-formats:
Table 7
| Leading format index | CP duration TCP | Sequence length TSEQ |
| 0 | 27744·Ts | 61440·Ts |
| 1 | 27744·Ts | 307200·Ts |
| 2 | 27744·Ts | 860160·Ts |
| 3 | 27744·Ts | 2457600·Ts |
| 4 | 24672·Ts | 122880·Ts |
| 5 | 24672·Ts | 307200·Ts |
| 6 | 24672·Ts | 860160·Ts |
| 7 | 24672·Ts | 2519040·Ts |
| 8 | 45600·Ts | 61440·Ts |
| 9 | 45600·Ts | 307200·Ts |
| 10 | 45600·Ts | 860160·Ts |
| 11 | 45600·Ts | 2457600·Ts |
| 12 | 40928·Ts | 122880·Ts |
| 13 | 40928·Ts | 307200·Ts |
| 14 | 40928·Ts | 860160·Ts |
| 15 | 40928·Ts | 2519040·Ts |
By upper table 7 it is found that a kind of each leading corresponding leading format of format index, the use of the leading configuration information instruction
It include that one group of leading format is indexed in the parameter for generating random access preamble, in this way, if this group leading format index is respectively 0
With 1, then the user equipment can choose the corresponding leading format of leading format index 0 and generate random access preamble, can also select
It selects the corresponding leading format of leading format index 1 and generates random access preamble, user equipment is according to one compared to the prior art
Leading format index determines that unique leading format generates random access preamble, and the implementation of the embodiment of the present invention is cleverer
It is living.
It should be noted that 5 kinds of different-formats of defined random access preamble, leading format index in the prior art
Respectively 0 to 4, in order to combine with the prior art, in a kind of possible implementation of the embodiment of the present invention, the present invention is real
The leading format index for applying the random access preamble that example defines is respectively 5 to 20.It is as shown in table 8 below:
Table 8
| Leading format index | CP duration TCP | Sequence length TSEQ |
| 0 | 3168·Ts | 24576·Ts |
| 1 | 21024·Ts | 24576·Ts |
| 2 | 6240·Ts | 2·24576·Ts |
| 3 | 21024·Ts | 2·24576·Ts |
| 4 | 448·Ts | 4096·Ts |
| 5 | 27744·Ts | 61440·Ts |
| 6 | 27744·Ts | 307200·Ts |
| 7 | 27744·Ts | 860160·Ts |
| 8 | 27744·Ts | 2457600·Ts |
| 9 | 24672·Ts | 122880·Ts |
| 10 | 24672·Ts | 307200·Ts |
| 11 | 24672·Ts | 860160·Ts |
| 12 | 24672·Ts | 2519040·Ts |
| 13 | 45600·Ts | 61440·Ts |
| 14 | 45600·Ts | 307200·Ts |
| 15 | 45600·Ts | 860160·Ts |
| 16 | 45600·Ts | 2457600·Ts |
| 17 | 40928·Ts | 122880·Ts |
| 18 | 40928·Ts | 307200·Ts |
| 19 | 40928·Ts | 860160·Ts |
| 20 | 40928·Ts | 2519040·Ts |
Illustratively, which uses leader sequence as shown in Figure 3, subcarrier spacing 600Hz, sequence length
It is 251, the following table 9 provides the random access preamble of 16 kinds of different-formats:
Table 9
It should be noted that 5 kinds of different-formats of defined random access preamble, leading format index in the prior art
Respectively 0 to 4, in order to combine with the prior art, in a kind of possible implementation of the embodiment of the present invention, the present invention is real
The leading format index for applying the random access preamble that example defines is respectively 5 to 20, specifically can refer to the corresponding description of table 8, this
Place repeats no more.
Illustratively, which uses leader sequence as shown in Figure 4, subcarrier spacing 625Hz, sequence length
It is 241, the following table 10 provides the random access preamble of 16 kinds of different-formats:
Table 10
It should be noted that 5 kinds of different-formats of defined random access preamble, leading format index in the prior art
Respectively 0 to 4, in order to combine with the prior art, in a kind of possible implementation of the embodiment of the present invention, the present invention is real
The leading format index for applying the random access preamble that example defines is respectively 5 to 20, specifically can refer to the corresponding description of table 8, this
Place repeats no more.
Aforesaid way one and mode two are implementation preferable in the embodiment of the present invention, in a particular application, user
Other leading formats can also be defined, and determine the leading format of random access preamble, the present invention couple using other modes
This is not construed as limiting.
In addition, different preamble sequence length and subcarrier spacing, the root sequence index and root ZC that are configured in user equipment
The mapping table of sequence index and the quantity Ncs of cyclic shift configure difference, meet matching for leader sequence shown in Fig. 2
It is set to table 1 and upper table 2, the configuration for meeting Fig. 3 or leader sequence shown in Fig. 4 can refer to table 1 and upper table 2 is corresponding retouches
It states, details are not described herein again.
Further, when the user equipment determines random access failure, before determining second in one group of leading format
Format is led, and generates the second random access preamble for meeting the second leading format；Wherein, which indicates
TSEQMeet following condition:M is the integer greater than N, then the user equipment is according to the resource allocation information, really
Surely it is used for transmission the resource of second random access preamble, and utilizes the resource transmission second random access preamble.
It should be noted that user equipment can determine random access failure by different modes, it specifically can be by user
It presets, for example, starting timer while the user device transmissions random access preamble, if the user equipment is fixed at this
When device meet preset time threshold before, do not receive the feedback information of the network side equipment, it is determined that random access failure；
Alternatively, user equipment retransmits the random access preamble when not being connected to the feedback information of the network side equipment, and counterweight
Counting how many times are passed, when re-transmission n times do not receive the feedback information of the network side equipment yet, determine that random access failure, n are big
In or equal to 1 positive integer.
Due to the T of the second leading format instructionSEQMeet following condition:M is the integer greater than N, table
In bright second random access preamble the number of repetition of leader sequence be greater than the user equipment according to the first leading format generate with
Machine access lead reduces in this way, user equipment carries out random access by the bigger random access preamble of transmission coverage area
Repeat to transmit the number of random access sequence, compared to the prior art user equipment largely repeat to send same leading format with
Machine accesses sequence and carries out random access, and the embodiment of the present invention reduces the waiting time of user equipment random access.
Optionally, before which determines the second leading format in one group of leading format, user equipment is determined
Channel quality information between network side equipment, and according to the channel quality information between the user equipment and network side equipment,
Determine the second leading format.Specifically can refer to above-mentioned user equipment in one group of leading format determine the first leading format it
Before, determine the corresponding description of channel quality information between user equipment and network side equipment, details are not described herein again.
Using the above method, this method is optimized the subcarrier spacing and frequency bandwidth of random access channel and sets
Meter is compared with the prior art using the subcarrier spacing of 1.25KHz and the frequency bandwidth of 6PRB, in the embodiment of the present invention
Subcarrier spacing is smaller, to improve the power spectral density of random access preamble, while guaranteeing the detection of random access preamble
Performance achievees the effect that coverage enhancement；In addition, the frequency bandwidth in the embodiment of the present invention is narrower, random access preamble is saved
Frequency spectrum resource expense, to improve resource utilization.
The embodiment of the present invention provides a kind of method of transmitting random access preamble, and the executing subject of this method is that network side is set
It is standby, as shown in figure 5, this method comprises:
S501, network side equipment send leading configuration information and resource allocation information to user equipment, this is leading with confidence
Breath indicates the parameter for generating random access preamble, and resource allocation information instruction can be used in transmitting random access preamble
Resource.
Wherein, the frequency bandwidth of the resource that can be used in transmitting random access preamble is at leastA physical resource
Block,For integer, and
It should be noted that in mobile communication system, which is base station, which is mobile whole
End can be, but not limited to be mobile whole by the both devices that random access establishes communication connection in wider Internet of Things
End and base station understand that the network side equipment of description of the embodiment of the present invention is regarded as base station, user equipment for convenience
It is considered mobile terminal.
S502, the network side equipment receive the user equipment in frequency bandwidthThe resource of a Physical Resource Block
The random access preamble of upper transmission.
Wherein, describedA Physical Resource Block includesA subcarrier, For integer, Δ fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
Specifically, the leading configuration information instruction includes root sequence index for generating the parameter of random access preamble,
Wherein, the value range of the root sequence index are as follows: [0, NZC- 2], NZCFor less than or equal to's
Largest prime number, wherein fGI≥30KHz。
Wherein, which can be logical root sequence index, be also possible to physics root sequence index.
Illustratively, user equipment is indexed according to the root of determining ZC sequence, generates root ZC sequence, and be based on root ZC sequence
Make cyclic shift, obtain multiple leader sequences, and according to the configuration of random access channel, determines the leader sequence used, tool
Body description can refer in one embodiment the corresponding user equipment of Tables 1 and 2 according to root sequence index generation leader sequence
Description, details are not described herein again.
In a kind of optional implementation of the embodiment of the present invention, whenWhen, the resource is matched in step S501
The resource that confidence breath instruction can be used in transmitting random access preamble is at least one Physical Resource Block.Optionally, user equipment is raw
At random access preamble subcarrier spacing Δ fRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
Illustratively, subcarrier spacing Δ f is presetRA=500Hz, in this way, since the frequency domain bandwidth of a PRB is 180KHz,
Then just have 360 subcarriers in a PRB, wherein in order to guarantee preamble sequence length be less than or equal toPrime number, with fGIFor=30KHz, and guarantee certain spreading gain, before selectable
Lead sequence length be 293,283 or 281 etc. prime numbers, as shown in Fig. 2, the length of the leader sequence is 293, then the leading sequence
The protection strip length for arranging two sides is respectively 33 and 34.
Optionally, as shown in figure 3, subcarrier spacing is preset as 600Hz, the length of the leader sequence is 251, the leading sequence
The protection strip length for arranging two sides is respectively 24 and 25.
Optionally, as shown in figure 4, subcarrier spacing is preset as 625Hz, the length of the leader sequence is 241, the leading sequence
The protection strip length for arranging two sides is respectively 23 and 24.
It should be noted that the resource allocation information in step S501 is one or more Physical Resource Block indexes, wherein
Each Physical Resource Block index one Physical Resource Block of instruction, before which can be according to preset random access
The quantity concrete configuration for leading the Physical Resource Block of occupancy only takes up one for Fig. 2, Fig. 3 and random access preamble shown in Fig. 4
In the case where a Physical Resource Block, which can be used for transmission for a Physical Resource Block index, unique instruction
One Physical Resource Block of the random access preamble, certainly, the resource allocation information may be multiple Physical Resource Block indexes,
Indicate that multiple Physical Resource Block that can be used for transmitting the random access preamble are randomly choosed for user equipment, the present invention does not do this
It limits.
In addition, Physical Resource Block index can be used to indicate that resource offset, which deviates according to the resource
Amount determines the resource number for being used for transmission the Physical Resource Block of random access preamble.For example, if the number of initial physical resource block
For 0 and the resource offset is 90, then the number for being used for transmission the starting Physical Resource Block of random access preamble is 90.In this way,
For occupying the random access preamble of a Physical Resource Block, which is transmitted using the Physical Resource Block that the number is 90
The random access preamble, for occupying the random access preamble of three Physical Resource Block, which is 90,91 using number
The random access preamble is transmitted with 92 3 Physical Resource Block.
The leader sequence of above-mentioned offer is preferred embodiment provided in an embodiment of the present invention, in a particular application, leading
The setting of sequence can also have other modes, for example, when subcarrier spacing is 500Hz, preamble sequence length 283；Subcarrier
Between when being divided into 600Hz, preamble sequence length is 241 etc., at the same time it can also reduce subcarrier spacing and to shorten leader sequence long
Degree makes the leader sequence occupy two or three Physical Resource Block, will not enumerate herein.
Further, user equipment is when generating random access preamble, it is also necessary to consider the leading of the random access preamble
Format, the leading format indicate the temporal duration T of leader sequence in random access preambleSEQAnd cyclic prefix when
Domain duration TCP.The leading format can also be indicated by the leading configuration information.
Optionally, the leading configuration information instruction includes leading format rope for generating the parameter of random access preamble
Draw, which indexes corresponding one group of leading format, which includes at least two leading formats, wherein every
The leading format of kind indicates the temporal duration T of leader sequence in random access preambleSEQAnd the time domain of cyclic prefix is held
Continuous time TCP。
Wherein, which meets the first leading format, the T of the first leading format instructionSEQMeet following item
Part:N is positive integer.
Specifically, which indexes according to the leading format determines the first leading format, and generate meet this first
The random access preamble of leading format, detailed process can refer to and correspond to the description of table 3 to table 6 in an embodiment.
Optionally, the parameter for generating random access preamble of the leading configuration information instruction includes one group of leading format
Index, this group leading format index corresponding one group of leading format, wherein before this group leading format index contains at least two
Format index is led, and a kind of each leading corresponding leading format of format index, every kind of leading format indicate random access preamble
The temporal duration T of middle leader sequenceSEQAnd the temporal duration T of cyclic prefixCP；
Specifically, which meets the first leading format, the T of the first leading format instructionSEQMeet as follows
Condition:N is positive integer.
Wherein, which indexes according to the leading format determines the first leading format, and generates and meet this before first
The random access preamble of format is led, detailed process can refer to and correspond to the description of table 7 to table 10 in an embodiment.
Using the above method, this method is optimized the subcarrier spacing and frequency bandwidth of random access channel and sets
Meter is compared with the prior art using the subcarrier spacing of 1.25KHz and the frequency bandwidth of 6PRB, in the embodiment of the present invention
Subcarrier spacing is smaller, to improve the power spectral density of random access preamble, while guaranteeing the detection of random access preamble
Performance achievees the effect that coverage enhancement；In addition, the frequency bandwidth in the embodiment of the present invention is narrower, random access preamble is saved
Frequency spectrum resource expense, to improve resource utilization.
The embodiment of the present invention provides a kind of user equipment 60, corresponds to the embodiment of the method for above-mentioned Fig. 1, the user equipment 60
Each functional unit is used equally for above method step.As shown in fig. 6, the user equipment 60 includes:
Receiving unit 61, for receiving the leading configuration information and resource allocation information of network side equipment transmission, this is leading
Configuration information indicates the parameter for generating random access preamble, and resource allocation information instruction can be used in transmitting random access
Leading resource.
Wherein, the frequency bandwidth of the resource that can be used in transmitting random access preamble is at leastA physical resource
Block,For integer, and
Processing unit 62, the leading configuration information for being received according to the receiving unit 61 generate random access preamble,
According to the resource allocation information that the receiving unit 61 receives, the resource for being used for transmission the random access preamble is determined.
Transmission unit 63, for the resource transmission of the utilization processing unit 62 determination random access preamble.
Wherein, the frequency bandwidth of the resource for being used for transmission random access preamble isA Physical Resource Block, shouldA Physical Resource Block includesA subcarrier, For integer, Δ
fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
The explanation of value, the user equipment 60 are properly termed as terminal, mobile station, subscriber unit, and platform etc. specifically may be used
Think cellular phone, personal digital assistant, handheld device, the wireless telecom equipments such as laptop computer.When the user equipment 60 is answered
When for M2M communication, which is properly termed as M2M terminal, specifically can be the support such as intelligent electric meter, intelligent appliance
The equipment of M2M communication.
Optionally, the leading configuration information instruction includes root sequence index for generating the parameter of random access preamble,
Wherein, the value range of the root sequence index are as follows: [0, NZC- 2], NZCFor less than or equal to's
Largest prime number, wherein fGI≥30KHz；The then leading configuration information that the processing unit 62 is received according to the receiving unit generates
Random access preamble specifically includes, which generates root ZC sequence, the sequence of root ZC sequence according to the root sequence index
Column length is NZC；According to root ZC sequence, random access preamble is generated.
Illustratively, which generates root ZC sequence according to root sequence index, and carries out circulation shifting to root ZC sequence
Position NCSMultiple leader sequences are generated, detailed process can refer to the embodiment of the method for corresponding above-mentioned Fig. 1, wherein the user equipment
The corresponding relationship of the logical root sequence index v as shown in the table 1 in Fig. 1 embodiment Yu physics root sequence index u can be preset
The configuration of cyclic shift shown in table and table 2 and cyclic shift value NCSMapping table.
In a kind of optional implementation of the embodiment of the present invention, whenWhen, what which received
The resource that resource allocation information instruction can be used in transmitting random access preamble is at least one Physical Resource Block.Optionally, the use
The subcarrier spacing Δ f for the random access preamble that family equipment generatesRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
Illustratively, subcarrier spacing Δ f is presetRA=500, in this way, since the frequency domain bandwidth of a PRB is 180KHz, then
Just have 360 subcarriers in one PRB, wherein in order to guarantee preamble sequence length be less than or equal toPrime number, with fGIFor=30KHz, and guarantee certain spreading gain, before selectable
Lead sequence length be 293,283 or 281 etc. prime numbers, as shown in Fig. 2, the length of the leader sequence is 293, then the leading sequence
The protection strip length for arranging two sides is respectively 33 and 34.
Optionally, as shown in figure 3, subcarrier spacing is preset as 600Hz, the length of the leader sequence is 251, the leading sequence
The protection strip length for arranging two sides is respectively 24 and 25.
Optionally, as shown in figure 4, subcarrier spacing is preset as 625Hz, the length of the leader sequence is 241, the leading sequence
The protection strip length for arranging two sides is respectively 23 and 24.
It should be noted that the resource allocation information that the user equipment receives is one or more Physical Resource Block ropes
Draw, wherein each Physical Resource Block index one Physical Resource Block of instruction, the resource allocation information can according to it is preset with
The quantity concrete configuration for the Physical Resource Block that machine access lead occupies, it is equal for Fig. 2, Fig. 3 and random access preamble shown in Fig. 4
In the case where only taking up a Physical Resource Block, which can be a Physical Resource Block index, unique to indicate
It is used for transmission a Physical Resource Block of the random access preamble, certainly, which may be multiple physics moneys
Source block index indicates that multiple Physical Resource Block that can be used for transmitting the random access preamble are randomly choosed for user equipment, this hair
It is bright not limit this.
In addition, Physical Resource Block index can be used to indicate that resource offset, which deviates according to the resource
Amount determines the resource number for being used for transmission the Physical Resource Block of random access preamble.For example, if the number of initial physical resource block
For 0 and the resource offset is 90, then the number for being used for transmission the starting Physical Resource Block of random access preamble is 90.In this way,
For occupying the random access preamble of a Physical Resource Block, which is transmitted using the Physical Resource Block that the number is 90
The random access preamble, for occupying the random access preamble of three Physical Resource Block, which is 90,91 using number
The random access preamble is transmitted with 92 3 Physical Resource Block.
The leader sequence of above-mentioned offer is preferred embodiment provided in an embodiment of the present invention, in a particular application, leading
The setting of sequence can also have other modes, for example, when subcarrier spacing is 500Hz, preamble sequence length 283；Subcarrier
Between when being divided into 600Hz, preamble sequence length is 241 etc., at the same time it can also reduce subcarrier spacing and to shorten leader sequence long
Degree makes the leader sequence occupy two or three Physical Resource Block, will not enumerate herein.
Further, the user equipment is when generating random access preamble, it is also necessary to before considering the random access preamble
Format is led, which indicates the temporal duration T of leader sequence in random access preambleSEQAnd cyclic prefix
Temporal duration TCP.The leading format can also be indicated by the leading configuration information.
Optionally, the leading configuration information instruction includes leading format rope for generating the parameter of random access preamble
Draw, which indexes corresponding one group of leading format, which includes at least two leading formats, wherein every
The leading format of kind indicates the temporal duration T of leader sequence in random access preambleSEQAnd the time domain of cyclic prefix is held
Continuous time TCP, then the user equipment determines the first leading format in one group of leading format, and generates that meet this first leading
The random access preamble of format；Wherein, the T of the first leading format instructionSEQMeet following condition:N is positive
Integer.
Specifically, which has been stored in advance the leading format of a variety of random access preambles, then the user equipment root
It is indexed according to the leading format and determines the first leading format, and generate the random access preamble for meeting the first leading format, mistake
Journey can refer to and correspond to the description of table 3 to table 6 in the embodiment of Fig. 1, and details are not described herein again.
Optionally, the parameter for generating random access preamble of the leading configuration information instruction includes one group of leading format
Index, this group leading format index corresponding one group of leading format, wherein before this group leading format index contains at least two
Format index is led, and a kind of each leading corresponding leading format of format index, every kind of leading format indicate random access preamble
The temporal duration T of middle leader sequenceSEQAnd the temporal duration T of cyclic prefixCP, then the user equipment is at this group
The first leading format is determined in leading format, and generates the random access preamble for meeting the first leading format；Wherein, this first
The T of leading format instructionSEQMeet following condition:N is positive integer.
Specifically, which has been stored in advance the leading format of a variety of random access preambles, then the user equipment root
It is indexed according to the leading format and determines the first leading format, and generate the random access preamble for meeting the first leading format, mistake
Journey can refer to and correspond to the description of table 7 to table 10 in the embodiment of Fig. 1, and details are not described herein again.
Optionally, when the user equipment determines random access failure, which is also used to, leading at this group
The second leading format is determined in format, and generates the second random access preamble for meeting the second leading format, and according to the money
Source configuration information determines the resource for being used for transmission second random access preamble；The transmission unit 63 is also used to, and utilizes the resource
Transmit second random access preamble.
Wherein, the T of the second leading format instructionSEQMeet following condition:M is the integer greater than N.
The user equipment can determine random access failure by different modes, can specifically be preset by user, example
Such as, start timer while the user device transmissions random access preamble, if the user equipment meets in advance in the timer
If time threshold before, do not receive the feedback information of the network side equipment, it is determined that random access failure；Alternatively, user
Equipment retransmits the random access preamble when not being connected to the feedback information of the network side equipment, and to number of retransmissions meter
Number determines random access failure when retransmitting n times and not receiving the feedback information of the network side equipment yet, n be more than or equal to
1 positive integer.
Due to the T of the second leading format instructionSEQMeet following condition:M is the integer greater than N, table
In bright second random access preamble the number of repetition of leader sequence be greater than the user equipment according to the first leading format generate with
Machine access lead reduces in this way, user equipment carries out random access by the bigger random access preamble of transmission coverage area
Repeat to transmit the number of random access sequence, compared to the prior art user equipment largely repeat to send same leading format with
Machine accesses sequence and carries out random access, and the embodiment of the present invention reduces the waiting time of user equipment random access.
Optionally, which is also used to, before determining the first leading format in one group of leading format, and/
Or, determining the channel between user equipment and network side equipment before determining the second leading format in one group of leading format
Quality information；The processing unit 62 determines the first leading format in one group of leading format, and/or, it should be leading at this group
Determine that the second leading format specifically includes in format, the processing unit 62 is according to the channel between the user equipment and network side equipment
Quality information determines the first leading format；And/or according to the channel quality information between the user equipment and network side equipment, really
Fixed second leading format.
Specifically, during the network side equipment initiates down-going synchronous to user equipment, user equipment is according to downlink
Can determine the channel quality information between the network side equipment synchronization time, then the user equipment when channel quality is preferable,
Low covering grade may be selected and index corresponding leading format generation random access preamble；When channel quality is poor, height may be selected
The corresponding leading format of covering grade index generates random access preamble.In this way, user equipment is to network compared to the prior art
Side apparatus sends the random access preamble of unique leading format, and the embodiment of the present invention improves the success of user equipment random access
Rate.
In addition, the user equipment can also determine the leading format index corresponding one at random according to the leading format index
The leading format of kind generates random access preamble, can also be with a certain leading format of default choice, such as default choice covering grade rope
The leading format for being cited as 0 generates random access preamble, and which is not limited by the present invention.
Using above-mentioned user equipment, the random access preamble and the prior art of the user device transmissions use 1.25KHz's
The frequency bandwidth of subcarrier spacing and 6PRB are compared, and subcarrier spacing is smaller, to improve the function of random access preamble
Rate spectrum density, while guaranteeing the detection performance of random access preamble, achieve the effect that coverage enhancement；And the random access preamble
Frequency bandwidth it is narrower, the frequency spectrum resource expense of random access preamble is saved, to improve resource utilization.
The embodiment of the present invention provides a kind of network side equipment 70, the embodiment of the method for corresponding above-mentioned Fig. 2, the network side equipment
70 each functional unit is used equally for above method step, as shown in fig. 7, the network side equipment 70 includes:
Transmission unit 71, for sending leading configuration information and resource allocation information to user equipment, this is leading with confidence
Breath indicates the parameter for generating random access preamble, and resource allocation information instruction can be used in transmitting random access preamble
Resource.
Wherein, the frequency bandwidth of the resource that can be used in transmitting random access preamble is at leastA physical resource
Block,For integer, and
Receiving unit 72 is for receiving the user equipment in frequency bandwidthThe resource of a Physical Resource Block uploads
The defeated random access preamble.
Wherein, shouldA Physical Resource Block includesA subcarrier, For integer, Δ fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
Optionally, the leading configuration information instruction includes leading format rope for generating the parameter of random access preamble
Draw, which indexes corresponding one group of leading format, which includes at least two leading formats, wherein every
The leading format of kind indicates the temporal duration T of leader sequence in random access preambleSEQAnd the time domain of cyclic prefix is held
Continuous time TCP。
Wherein, which meets the first leading format, the T of the first leading format instructionSEQMeet following item
Part:N is positive integer.
Optionally, the parameter for generating random access preamble of the leading configuration information instruction includes one group of leading format
Index, this group leading format index corresponding one group of leading format, wherein before this group leading format index contains at least two
Format index is led, and a kind of each leading corresponding leading format of format index, every kind of leading format indicate random access preamble
The temporal duration T of middle leader sequenceSEQAnd the temporal duration T of cyclic prefixCP。
Wherein, which meets the first leading format, the T of the first leading format instructionSEQMeet following item
Part:N is positive integer.
Optionally, the leading configuration information instruction includes root sequence index for generating the parameter of random access preamble,
Wherein, the value range of the root sequence index are as follows: [0, NZC- 2], NZCFor less than or equal to's
Largest prime number, wherein fGI≥30KHz。
Optionally,ΔfRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
Optionally, which is one or more Physical Resource Block indexes, wherein each Physical Resource Block rope
Draw one Physical Resource Block of instruction.
Using above-mentioned network side equipment, which indicates the random access preamble and existing skill of user device transmissions
Art is compared using the subcarrier spacing of 1.25KHz and the frequency bandwidth of 6PRB, and subcarrier spacing is smaller, to improve
The power spectral density of random access preamble, while guaranteeing the detection performance of random access preamble, achieve the effect that coverage enhancement；And
And the frequency bandwidth of the random access preamble is narrower, saves the frequency spectrum resource expense of random access preamble, to improve money
Source utilization rate.
The embodiment of the present invention provides a kind of user equipment 80, as shown in figure 8, the user equipment 80 includes:
Processor (processor) 81,82, memory communication interface (Communications Interface)
(memory) 83 and communication bus 84；Wherein, the processor 81, the communication interface 82 and the memory 83 pass through described
Communication bus 84 completes mutual communication.
Processor 81 may be multi-core central processing unit CPU or specific integrated circuit ASIC
(Application Specific Integrated Circuit), or be arranged to implement the one of the embodiment of the present invention
A or multiple integrated circuits.
For memory 83 for storing program code, said program code includes computer operation instruction and network flow diagrams.It deposits
Reservoir 83 may include high speed RAM memory, it is also possible to and it further include nonvolatile memory (non-volatile memory),
A for example, at least magnetic disk storage.Memory 83 is also possible to memory array.Memory 83 is also possible to by piecemeal, and institute
Virtual volume can be combined by certain rule by stating block.
The communication interface 82, for realizing the connection communication between these devices.
The processor 81 is used to execute the program code in the memory 83, to realize following operation:
Leading configuration information and resource allocation information that network side equipment is sent are received, the leading configuration information instruction is used
In the parameter for generating random access preamble, the resource allocation information instruction can be used in the resource of transmitting random access preamble；
Wherein, the frequency bandwidth of the resource that can be used in transmitting random access preamble is at leastA Physical Resource Block,For integer, and
According to the leading configuration information, random access preamble is generated；
According to the resource allocation information, the resource for being used for transmission the random access preamble is determined, and utilize the money
Transmit the random access preamble in source；
Wherein, the frequency bandwidth of the resource for being used for transmission the random access preamble isA physical resource
Block, it is describedA Physical Resource Block includesA subcarrier, For
Integer, Δ fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
Optionally, the leading configuration information instruction includes leading format rope for generating the parameter of random access preamble
Drawing, the leading format indexes corresponding one group of leading format, and one group of leading format includes at least two leading formats,
In, every kind of leading format indicates the temporal duration T of leader sequence in random access preambleSEQAnd cyclic prefix when
Domain duration TCP；
It is described according to the leading configuration information, generate random access preamble and specifically include:
The first leading format is determined in one group of leading format, and is generated and met the random of the described first leading format
Access lead；Wherein, the T of the described first leading format instructionSEQMeet following condition:N is positive integer.
Optionally, the parameter for generating random access preamble of the leading configuration information instruction includes one group of leading lattice
Formula index, one group of leading format index corresponding one group of leading format, wherein one group of leading format index is comprising at least
Two leading format indexes, and a kind of each leading corresponding leading format of format index, every kind of leading format indicates to be connect at random
Enter the temporal duration T of leading middle leader sequenceSEQAnd the temporal duration T of cyclic prefixCP；
It is described according to the leading configuration information, generate random access preamble and specifically include:
The first leading format is determined in one group of leading format, and is generated and met the random of the described first leading format
Access lead；Wherein, the T of the described first leading format instructionSEQMeet following condition:N is positive integer.
Optionally, when the user equipment determines random access failure, the operation further include:
The second leading format is determined in one group of leading format, and is generated and met the second of the described second leading format
Random access preamble；Wherein, the T of the described second leading format instructionSEQMeet following condition:M is greater than N
Integer；
According to the resource allocation information, the resource for being used for transmission second random access preamble is determined, and utilize institute
State the second random access preamble described in resource transmission.
Optionally, before determining the first leading format in one group of leading format, and/or, it is leading at described one group
Before determining the second leading format in format, the operation further include:
Determine the channel quality information between user equipment and network side equipment；
The first leading format determining in one group of leading format, and/or, it is described in one group of leading format
The leading format of middle determination second, comprising:
According to the channel quality information between the user equipment and network side equipment, the first leading format is determined；And/or
According to the channel quality information between the user equipment and network side equipment, the second leading format is determined.
Optionally, the leading configuration information instruction includes root sequence rope for generating the parameter of random access preamble
Draw, wherein the value range of described sequence index are as follows: [0, NZC- 2], NZCFor less than or equal toLargest prime number, wherein fGI≥30KHz；
It is described according to the leading configuration information, generate random access preamble and specifically include:
According to described sequence index, root ZC sequence is generated, the sequence length of described ZC sequence is NZC；
According to described ZC sequence, random access preamble is generated.
Optionally,ΔfRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
Optionally, the resource allocation information is one or more Physical Resource Block indexes, wherein each Physical Resource Block
Index one Physical Resource Block of instruction.
It is apparent to those skilled in the art that for convenience and simplicity of description, only with above-mentioned each function
The division progress of module can according to need and for example, in practical application by above-mentioned function distribution by different function moulds
Block is completed, i.e., the internal structure of device is divided into different functional modules, to complete all or part of function described above
Energy.The specific work process of the system, apparatus, and unit of foregoing description, can be with reference to corresponding in preceding method embodiment
Journey, details are not described herein.
The embodiment of the present invention provides a kind of network side equipment 90, as shown in figure 9, the network side equipment 90 includes:
Processor (processor) 91,92, memory communication interface (Communications Interface)
(memory) 93 and communication bus 94；Wherein, the processor 91, the communication interface 92 and the memory 93 pass through described
Communication bus 94 completes mutual communication.
Processor 91 may be multi-core central processing unit CPU or specific integrated circuit ASIC
(Application Specific Integrated Circuit), or be arranged to implement the one of the embodiment of the present invention
A or multiple integrated circuits.
For memory 93 for storing program code, said program code includes computer operation instruction and network flow diagrams.It deposits
Reservoir 93 may include high speed RAM memory, it is also possible to and it further include nonvolatile memory (non-volatile memory),
A for example, at least magnetic disk storage.Memory 93 is also possible to memory array.Memory 93 is also possible to by piecemeal, and institute
Virtual volume can be combined by certain rule by stating block.
The communication interface 92, for realizing the connection communication between these devices.
The processor 91 is used to execute the program code in the memory 93, to realize following operation:
Leading configuration information and resource allocation information are sent to user equipment, the leading configuration information instruction is for generating
The parameter of random access preamble, the resource allocation information instruction can be used in the resource of transmitting random access preamble；Wherein, institute
The frequency bandwidth for stating the resource that can be used in transmitting random access preamble is at leastA Physical Resource Block,It is whole
Number, and
The user equipment, which is received, in frequency bandwidth isThe transmitted over resources of a Physical Resource Block it is described random
Access lead；
Wherein, describedA Physical Resource Block includesA subcarrier, For integer, Δ fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
Optionally, the leading configuration information instruction includes leading format rope for generating the parameter of random access preamble
Drawing, the leading format indexes corresponding one group of leading format, and one group of leading format includes at least two leading formats,
In, every kind of leading format indicates the temporal duration T of leader sequence in random access preambleSEQAnd cyclic prefix when
Domain duration TCP；
Wherein, the random access preamble meets the first leading format, the T of the first leading format instructionSEQMeet such as
Lower condition:N is positive integer.
Optionally, the parameter for generating random access preamble of the leading configuration information instruction includes one group of leading lattice
Formula index, one group of leading format index corresponding one group of leading format, wherein one group of leading format index is comprising at least
Two leading format indexes, and a kind of each leading corresponding leading format of format index, every kind of leading format indicates to be connect at random
Enter the temporal duration T of leading middle leader sequenceSEQAnd the temporal duration T of cyclic prefixCP；
Wherein, the random access preamble meets the first leading format, the T of the first leading format instructionSEQMeet such as
Lower condition:N is positive integer.
Optionally, the leading configuration information instruction includes root sequence rope for generating the parameter of random access preamble
Draw, wherein the value range of described sequence index are as follows: [0, NZC- 2], NZCFor for less than or equal toLargest prime number, wherein fGI≥30KHz。
Optionally,ΔfRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
Optionally, the resource allocation information is one or more Physical Resource Block indexes, wherein each Physical Resource Block
Index one Physical Resource Block of instruction.
It is apparent to those skilled in the art that for convenience and simplicity of description, only with above-mentioned each function
The division progress of module can according to need and for example, in practical application by above-mentioned function distribution by different function moulds
Block is completed, i.e., the internal structure of device is divided into different functional modules, to complete all or part of function described above
Energy.The specific work process of the system, apparatus, and unit of foregoing description, can be with reference to corresponding in preceding method embodiment
Journey, details are not described herein.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (28)
1. a kind of user equipment, which is characterized in that the user equipment includes:
Receiving unit, for receiving the leading configuration information and resource allocation information of network side equipment transmission, the leading configuration
Information indicates the parameter for generating random access preamble, and the resource allocation information instruction can be used in front of transmitting random access
The resource led；Wherein, the frequency bandwidth of the resource that can be used in transmitting random access preamble is at leastA physics
Resource block,For integer, and
Processing unit, the leading configuration information for being received according to the receiving unit generate random access preamble；
According to the resource allocation information that the receiving unit receives, the resource for being used for transmission the random access preamble is determined；
Transmission unit, for utilizing random access preamble described in the resource transmission；
Wherein, the frequency bandwidth of the resource for being used for transmission random access preamble isA Physical Resource Block, it is describedA Physical Resource Block includesA subcarrier, For integer, Δ
fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
2. user equipment according to claim 1, it is characterised in that:
The parameter for generating random access preamble of the leading configuration information instruction includes leading format index, described leading
Format indexes corresponding one group of leading format, and one group of leading format includes at least two leading formats, wherein every kind of leading lattice
Formula indicates the temporal duration T of leader sequence in random access preambleSEQAnd the temporal duration T of cyclic prefixCP；
The leading configuration information that the processing unit is received according to the receiving unit generates random access preamble, comprising:
The first leading format is determined in one group of leading format, and generates the random access for meeting the described first leading format
It is leading；Wherein, the T of the described first leading format instructionSEQMeet following condition:N is positive integer.
3. user equipment according to claim 1, it is characterised in that:
The parameter for generating random access preamble of the leading configuration information instruction includes one group of leading format index, described
One group of leading format indexes corresponding one group of leading format, wherein one group of leading format index contains at least two leading lattice
Formula index, and a kind of each leading corresponding leading format of format index, before every kind of leading format indicates in random access preamble
Lead the temporal duration T of sequenceSEQAnd the temporal duration T of cyclic prefixCP；
The leading configuration information that the processing unit is received according to the receiving unit generates random access preamble, comprising:
The first leading format is determined in one group of leading format, and generates the random access for meeting the described first leading format
It is leading；Wherein, the T of the described first leading format instructionSEQMeet following condition:N is positive integer.
4. user equipment according to claim 2 or 3, which is characterized in that when the user equipment determines that random access loses
When losing, the processing unit is also used to:
The second leading format is determined in one group of leading format, and is generated and met the second random of the described second leading format
Access lead；Wherein, the T of the described second leading format instructionSEQMeet following condition:M is whole greater than N
Number；
According to the resource allocation information, the resource for being used for transmission second random access preamble is determined；
The transmission unit is also used to, and utilizes the second random access preamble described in the resource transmission.
5. user equipment according to any one of claims 2 to 3, which is characterized in that the processing unit is also used to, in institute
It states before determining the first leading format in one group of leading format, and/or, the second leading lattice are determined in one group of leading format
Before formula,
Determine the channel quality information between user equipment and network side equipment；
The processing unit determines the first leading format in one group of leading format, and/or, it is described leading at described one group
The second leading format is determined in format, comprising:
According to the channel quality information between the user equipment and network side equipment, the first leading format is determined；And/or
According to the channel quality information between the user equipment and network side equipment, the second leading format is determined.
6. user equipment according to any one of claims 1 to 3, it is characterised in that:
The leading configuration information instruction includes root sequence index for generating the parameter of random access preamble, wherein described
The value range of root sequence index are as follows: [0, NZC- 2], NZCFor less than or equal toMaximum matter
Number, wherein fGIFor frequency domain protection interval, fGI≥30KHz；
The leading configuration information that the processing unit is received according to the receiving unit generates random access preamble, comprising:
According to described sequence index, root ZC sequence is generated, the sequence length of described ZC sequence is NZC；
According to described ZC sequence, random access preamble is generated.
7. user equipment according to any one of claims 1 to 3, it is characterised in that:
ΔfRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
8. user equipment according to claim 7, it is characterised in that:
The resource allocation information is one or more Physical Resource Block indexes, wherein each Physical Resource Block index instruction one
A Physical Resource Block.
9. a kind of network side equipment, which is characterized in that the network side equipment includes:
Transmission unit, for referring to the leading configuration information of user equipment transmission and resource allocation information, the leading configuration information
Show the parameter for generating random access preamble, the resource allocation information instruction can be used in the money of transmitting random access preamble
Source；Wherein, the frequency bandwidth of the resource that can be used in transmitting random access preamble is at leastA Physical Resource Block,For integer, and
Receiving unit is for receiving the user equipment in frequency bandwidthThe transmitted over resources of a Physical Resource Block
The random access preamble；
Wherein, describedA Physical Resource Block includesA subcarrier, For integer, Δ fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
10. network side equipment according to claim 9, it is characterised in that:
The parameter for generating random access preamble of the leading configuration information instruction includes leading format index, described leading
Format indexes corresponding one group of leading format, and one group of leading format includes at least two leading formats, wherein every kind of leading lattice
Formula indicates the temporal duration T of leader sequence in random access preambleSEQAnd the temporal duration T of cyclic prefixCP；
Wherein, the random access preamble meets the first leading format, the T of the first leading format instructionSEQMeet following item
Part:N is positive integer.
11. network side equipment according to claim 9, it is characterised in that:
The parameter for generating random access preamble of the leading configuration information instruction includes one group of leading format index, described
One group of leading format indexes corresponding one group of leading format, wherein one group of leading format index contains at least two leading lattice
Formula index, and a kind of each leading corresponding leading format of format index, before every kind of leading format indicates in random access preamble
Lead the temporal duration T of sequenceSEQAnd the temporal duration T of cyclic prefixCP；
Wherein, the random access preamble meets the first leading format, the T of the first leading format instructionSEQMeet following item
Part:N is positive integer.
12. according to the described in any item network side equipments of claim 9 to 11, which is characterized in that the leading configuration information refers to
Showing includes root sequence index for generating the parameter of random access preamble, wherein the value range of described sequence index are as follows:
[0,NZC- 2], NZCFor less than or equal toLargest prime number, wherein fGIBetween frequency domain protection
Every fGI≥30KHz。
13. according to the described in any item network side equipments of claim 9 to 11, it is characterised in that:
ΔfRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
14. network side equipment according to claim 13, it is characterised in that:
The resource allocation information is one or more Physical Resource Block indexes, wherein each Physical Resource Block index instruction one
A Physical Resource Block.
15. a kind of method of transmitting random access preamble, the random access preamble includes leader sequence and cyclic prefix, user
Equipment transmits the random access preamble to initiate random access, which is characterized in that the described method includes:
Leading configuration information and resource allocation information that network side equipment is sent are received, the leading configuration information instruction is for giving birth to
At the parameter of random access preamble, the resource allocation information instruction can be used in the resource of transmitting random access preamble；Wherein,
The frequency bandwidth of the resource that can be used in transmitting random access preamble is at leastA Physical Resource Block,For
Integer, and
According to the leading configuration information, random access preamble is generated；
According to the resource allocation information, the resource for being used for transmission the random access preamble is determined, and passed using the resource
The defeated random access preamble；
Wherein, the frequency bandwidth of the resource for being used for transmission the random access preamble isA Physical Resource Block, it is describedA Physical Resource Block includesA subcarrier, For integer, Δ
fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
16. according to the method for claim 15, it is characterised in that:
The parameter for generating random access preamble of the leading configuration information instruction includes leading format index, described leading
Format indexes corresponding one group of leading format, and one group of leading format includes at least two leading formats, wherein every kind of leading lattice
Formula indicates the temporal duration T of leader sequence in random access preambleSEQAnd the temporal duration T of cyclic prefixCP；
It is described according to the leading configuration information, generate random access preamble, comprising:
The first leading format is determined in one group of leading format, and generates the random access for meeting the described first leading format
It is leading；Wherein, the T of the described first leading format instructionSEQMeet following condition:N is positive integer.
17. according to the method for claim 15, it is characterised in that:
The parameter for generating random access preamble of the leading configuration information instruction includes one group of leading format index, described
One group of leading format indexes corresponding one group of leading format, wherein one group of leading format index contains at least two leading lattice
Formula index, and a kind of each leading corresponding leading format of format index, before every kind of leading format indicates in random access preamble
Lead the temporal duration T of sequenceSEQAnd the temporal duration T of cyclic prefixCP；
It is described according to the leading configuration information, generate random access preamble, comprising:
The first leading format is determined in one group of leading format, and generates the random access for meeting the described first leading format
It is leading；Wherein, the T of the described first leading format instructionSEQMeet following condition:N is positive integer.
18. method according to claim 16 or 17, which is characterized in that when the user equipment determines random access failure
When, the method also includes:
The second leading format is determined in one group of leading format, and is generated and met the second random of the described second leading format
Access lead；Wherein, the T of the described second leading format instructionSEQMeet following condition:M is whole greater than N
Number；
According to the resource allocation information, the resource for being used for transmission second random access preamble is determined, and utilize the money
Transmit second random access preamble in source.
19. 6 to 17 described in any item methods according to claim 1, which is characterized in that determined in one group of leading format
Before first leading format, and/or, before determining the second leading format in one group of leading format, the method is also wrapped
It includes:
Determine the channel quality information between user equipment and network side equipment；
The first leading format determining in one group of leading format, and/or, it is described true in one group of leading format
Fixed second leading format, comprising:
According to the channel quality information between the user equipment and network side equipment, the first leading format is determined；And/or
According to the channel quality information between the user equipment and network side equipment, the second leading format is determined.
20. 5 to 17 described in any item methods according to claim 1, it is characterised in that:
The leading configuration information instruction includes root sequence index for generating the parameter of random access preamble, wherein described
The value range of root sequence index are as follows: [0, NZC- 2], NZCFor less than or equal toMaximum matter
Number, wherein fGIFor frequency domain protection interval, fGI≥30KHz；
It is described according to the leading configuration information, generate random access preamble, comprising:
According to described sequence index, root ZC sequence is generated, the sequence length of described ZC sequence is NZC；
According to described ZC sequence, random access preamble is generated.
21. 5 to 17 described in any item methods according to claim 1, it is characterised in that:ΔfRA=500Hz,
ΔfRA=600Hz or Δ fRA=625Hz.
22. according to the method for claim 21, it is characterised in that:
The resource allocation information is one or more Physical Resource Block indexes, wherein each Physical Resource Block index instruction one
A Physical Resource Block.
23. a kind of method of transmitting random access preamble, the random access preamble includes leader sequence and cyclic prefix, user
Equipment transmits the random access preamble to initiate random access, which is characterized in that the described method includes:
Leading configuration information and resource allocation information are sent to user equipment, the leading configuration information instruction is random for generating
The parameter of access lead, the resource allocation information instruction can be used in the resource of transmitting random access preamble；Wherein, the energy
The frequency bandwidth for being enough in the resource of transmitting random access preamble is at leastA Physical Resource Block,For integer,
And
The user equipment, which is received, in frequency bandwidth isThe random access of the transmitted over resources of a Physical Resource Block
It is leading；
Wherein, describedA Physical Resource Block includesA subcarrier, For integer, Δ fRAFor the subcarrier spacing of the random access preamble, and 312.5Hz≤Δ fRA≤625Hz。
24. according to the method for claim 23, it is characterised in that:
The parameter for generating random access preamble of the leading configuration information instruction includes leading format index, described leading
Format indexes corresponding one group of leading format, and one group of leading format includes at least two leading formats, wherein every kind of leading lattice
Formula indicates the temporal duration T of leader sequence in random access preambleSEQAnd the temporal duration T of cyclic prefixCP；
Wherein, the random access preamble meets the first leading format, the T of the first leading format instructionSEQMeet following item
Part:N is positive integer.
25. according to the method for claim 23, it is characterised in that:
The parameter for generating random access preamble of the leading configuration information instruction includes one group of leading format index, described
One group of leading format indexes corresponding one group of leading format, wherein one group of leading format index contains at least two leading lattice
Formula index, and a kind of each leading corresponding leading format of format index, before every kind of leading format indicates in random access preamble
Lead the temporal duration T of sequenceSEQAnd the temporal duration T of cyclic prefixCP；
Wherein, the random access preamble meets the first leading format, the T of the first leading format instructionSEQMeet following item
Part:N is positive integer.
26. according to the described in any item methods of claim 23 to 25, which is characterized in that the use of the leading configuration information instruction
In generate random access preamble parameter include root sequence index, wherein the value range of described sequence index are as follows: [0, NZC-
2], NZCFor less than or equal toLargest prime number, wherein fGIFor frequency domain protection interval, fGI≥
30KHz。
27. according to the described in any item methods of claim 23 to 25, it is characterised in that:
ΔfRA=500Hz, Δ fRA=600Hz or Δ fRA=625Hz.
28. according to the method for claim 27, it is characterised in that:
The resource allocation information is one or more Physical Resource Block indexes, wherein each Physical Resource Block index instruction one
A Physical Resource Block.
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2014/083055 WO2016011667A1 (en) | 2014-07-25 | 2014-07-25 | Method and device for transmitting random access preamble |
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| CN105474725B true CN105474725B (en) | 2019-03-26 |
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| CN107872817B (en) * | 2016-09-27 | 2021-02-09 | 华为技术有限公司 | Resource allocation method, network equipment and terminal equipment |
| CN117062227A (en) | 2016-11-04 | 2023-11-14 | 中兴通讯股份有限公司 | Wireless communication method, apparatus, node, and computer-readable program storage medium |
| CN110213834B (en) * | 2017-01-06 | 2020-09-29 | 华为技术有限公司 | Random access method, user equipment and network equipment |
| CN108307506B (en) * | 2017-01-13 | 2023-08-29 | 北京三星通信技术研究有限公司 | Method and device for configuring random access resource and random access method and device |
| CN109803435B (en) * | 2017-11-16 | 2023-04-07 | 北京三星通信技术研究有限公司 | Random access method and equipment thereof |
| KR102530275B1 (en) | 2017-06-26 | 2023-05-09 | 삼성전자 주식회사 | Preamble generation method, preamble setting method and apparatus, random access method, device, user equipment and base station |
| CN109429355B (en) * | 2017-08-23 | 2022-02-01 | 维沃移动通信有限公司 | Random access processing method, user terminal and network side equipment |
| CN113260077B (en) | 2017-11-15 | 2022-08-23 | 华为技术有限公司 | Random access method, user equipment and network equipment |
| WO2020199190A1 (en) * | 2019-04-04 | 2020-10-08 | Zte Corporation | System and method for configuring random access preambles |
| CN110214427B (en) * | 2019-04-23 | 2022-03-01 | 北京小米移动软件有限公司 | Method, device and medium for sending and receiving feedback information |
| CN112583755B (en) * | 2019-09-30 | 2022-05-06 | 华为技术有限公司 | Satellite communication method and related communication device |
| WO2022198473A1 (en) * | 2021-03-24 | 2022-09-29 | Oppo广东移动通信有限公司 | Resource configuration method, terminal device, and network device |
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| CN101478792A (en) * | 2008-01-03 | 2009-07-08 | 大唐移动通信设备有限公司 | Dedicated random access resource preservation method and base station |
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