CN105451363B - The method of random access, base station and user equipment in narrowband systems - Google Patents
The method of random access, base station and user equipment in narrowband systems Download PDFInfo
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- CN105451363B CN105451363B CN201410487735.1A CN201410487735A CN105451363B CN 105451363 B CN105451363 B CN 105451363B CN 201410487735 A CN201410487735 A CN 201410487735A CN 105451363 B CN105451363 B CN 105451363B
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Abstract
The present invention provides the method for random access, base station and user equipment, this method in narrowband systems to include：Random access lead code is sent to base station by user equipment；Base station sends the first random access response for carrying user identifier and TA values according to the random access lead code；Meanwhile base station carries out acceptance judging, and receives successfully, pre-allocates SR resources etc. in advance, and send carrying it is final be resident frequency point, the transfer resource of request message and the second random access response of power adjustment are established in RRC connections；User equipment establishes request message according to receiving the first random access response and the second random access response and send RRC connections；Request message is established in base station according to the RRC connections, and message is established in the RRC connections for carrying SR resource informations is sent to user equipment；User equipment establishes message arrangement SR resources etc. according to the RRC connections.Method provided by the invention is effectively improved the flexibility of resource allocation, reduces resource consumption and time delay that random access failure is brought.
Description
Technical field
The present invention relates to fields of communication technology, and in particular to the method for random access, base station and user set in narrowband systems
It is standby.
Background technology
The design of cordless communication network is limited to available band situation, the system for distributing continuous and a wide range of bandwidth,
All kinds of control channels and Traffic Channel can be designed more at leisure.But it is discrete for available band and each is discrete available
The relatively narrow band resource of frequency band, how all kinds of channels of reasonable design, and how fully utilize discrete narrow band resource can compare
Broadband system is more difficult.Furthermore, it is contemplated that the considerations of cost problem of terminal and system design in actual product, it may
There are monitorings and reception that great amount of terminals only supports progress control channel, especially authorization channel in narrow bandwidth range.So narrowband
Even if system can carry out the mode of carrier wave polymerization, will carry out data transmission on terminal scheduling to its any one narrowband frequency point,
But terminal still needs that some narrowband frequency point is specified to be resident before dispatching, and is authorized with monitoring.The resident frequency point needs
It is configured in the random access procedure.
Due to narrowband systems frequency point Bandwidth-Constrained, thus single frames can carry effective information with respect to for broadband system very
It is limited.As shown in Figure 1, for the flow diagram of existing accidental access method, message m sg2, msg3 and msg4 in figure are single
Frame transmits, i.e., each message needs the end of transmission in a frame.This is limited to current random access procedure and message lattice
Formula, such as msg3 and msg4 belong to wireless chain control layer agreement (Radio Link Control, abbreviation RLC) TM patterns, nothing
Method is segmented in RLC and concatenates, so can only single frames transmission.
So for narrowband systems, due configuration information is carried in random access, and relative to broadband system
Frequency point information is resident in more instruction accordingly, then single frame transmission information content is limited to become the design of narrowband systems random access
A bottleneck.It due to being narrowband systems, and considers terminal cost, certainly exists the terminal of a large amount of narrow-band reception ability,
It can only be resident on a narrowband frequency point, carry out the monitoring and reception of the authorization channel on the narrowband frequency point, and it is existing random
In access procedure, admission control is that the control plane after message 3 by base station is completed, and issues result by message 4.On the one hand it wants
Indicate that additional resident frequency point information can occupy the expense of message 4, it is entire random if on the other hand message 4 receives refusal
Access process can re-start, and waste interface-free resources, lead to access delay.
Invention content
In view of the drawbacks of the prior art, the present invention provides method, base station and the user of random access in a kind of narrowband systems
Equipment is issued by random access response substep, carries out acceptance judging on this basis, and resident frequency point and transmission frequency point are divided
It opens up and sets, improve the flexibility of resource allocation, reduce resource consumption and time delay that random access failure is brought.
In a first aspect, the present invention provides a kind of method of random access in narrowband systems, this method includes：
Base station receives the random access lead code that user equipment (UE) is sent when accessing the base station；
According to the random access lead code, the time advance adjustment amount TA for adjusting the UE Timing Advances is obtained
Value；
The first random access response is sent to the UE, first random access response includes：TA values and described
The scrambling of UE identifies；And
When the base station is determined to receive the UE according to the capacity of interface-free resources, it is random to send second to the UE
Access response, second random access response include：Resident frequency point, the transmission that request message is established for establishing RRC connections
Resource and power adjustment；
It receives the RRC connections that the UE is sent and establishes request message, it is the UE roots that request message is established in the RRC connections
It is sent according to first random access response and the second random access response；
RRC connections are sent to the UE and establish message, and the RRC connections establish message and include：The base station is the UE
The uplink scheduling request SR resources of distribution, so that the UE establishes message arrangement SR resources according to the RRC connections, to access
State base station.
Preferably, the method further includes：
After second random access response is sent to the UE by the base station, start first timer, until receiving
When establishing the time of request message or first timer record more than set threshold value to the RRC connections, stop institute
State first timer；
If the time of the first timer record is more than set threshold value, the UE scramblings mark and SR of distribution are discharged
Resource.
Preferably, the method further includes：
When the base station sends the second random access response to the UE, using the scrambling mark of the UE to described the
Two random access responses are scrambled, and the second random access response after scrambling is sent to the UE.
Second aspect, the present invention provides a kind of method of random access in narrowband systems, this method includes：
UE sends random access lead code in access base station, to the base station, so that the base station is according to described random
Access lead code obtains the TA values for adjusting the UE Timing Advances；
The first random access response that the base station is sent is received, first random access response receives for the base station
It is sent after the random access lead code, includes the scrambling mark of TA values and UE；
The second random access response that base station is sent is received, second random access response is that the base station is determining energy
It enough receives and is sent when the UE, including resident frequency point, transfer resource and power that request message is established for establishing RRC connections
Adjusted value；
RRC connections foundation is sent according to first random access response and the second random access response to the base station to ask
Seek message；
It receives the RRC connections that base station is sent and establishes message, the RRC connections establish message and include：The base station is described
The SR resources of UE distribution；
Message arrangement object SR resources are established according to the RRC connections, access the base station.
Preferably, the method further includes：
After the UE sends the random access lead code to the base station, start second timer, until receiving institute
When stating the time of the second random access response or second timer record more than set threshold value, it is fixed to stop described second
When device；
If the time of the second timer record is more than set threshold value, judge that random access procedure fails, UE
It discharges allocated user and scrambles mark.
Preferably, after the UE receives first random response, by the reception frequency of first random response transmission
Point waits second random access response to be received as resident frequency point temporarily.
The third aspect, the present invention provides a kind of base station, the base station includes：
Receiving unit, the random access lead code sent for receiving user equipment (UE) when accessing the base station；
Acquiring unit, for according to the random access lead code, obtaining the TA for adjusting the UE Timing Advances
Value；
Transmission unit, for sending the first random access response to the UE, first random access response includes：Institute
State TA values and the scrambling mark of the UE；
Transmission unit is additionally operable to after sending first random access response, in the base station according to interface-free resources
When capacity is determined to receive the UE, the second random access response, the second random access response packet are sent to the UE
It includes：Resident frequency point, the transfer resource and power adjustment that request message is established for establishing RRC connections；
Receiving unit is additionally operable to after sending second random access response, is received the RRC connections that the UE is sent and is built
Vertical request message, it is the UE random according to first random access response and second that request message is established in the RRC connections
Access response is sent；
Transmission unit is additionally operable to after receiving the RRC connections and establishing request message, and sending RRC connections to the UE builds
Vertical message, the RRC connections establish message and include：The base station is the uplink scheduling request SR resources of UE distribution, so that
The UE establishes message arrangement SR resources according to the RRC connections, to access the base station.
Preferably, which further includes：
First time acquiring unit, for when second random access response is sent to the UE by the base station,
Start first timer, request message is established in the RRC connections or the time of first timer record is big until receiving
When set threshold value, stop the first timer；
First judging unit, for when the time that the first timer records being more than set threshold value, release to divide
The UE scramblings mark and SR resources matched.
Fourth aspect, the present invention provides a kind of user equipment, the user equipment includes：
Transmission unit, for sending random access lead code to base station, so that before the base station is according to the random access
Leading code obtains the TA values for adjusting UE Timing Advances；
Receiving unit, the first random access response for receiving base station transmission, first random access response is institute
It states base station and receives what the random access lead code was sent later, include the response of TA values and the scrambling mark of UE；
Receiving unit is additionally operable to after receiving first random access response, is received base station is sent second and is connect at random
Enter response, the second random access response base station is sent when being determined to receive the UE, including resident frequency
Point, the transfer resource and power adjustment that request message is established for establishing RRC connections；
Transmission unit is additionally operable to after receiving second random access response, according to first random access response
It is connected to base station transmission RRC with the second random access response and establishes request message；
Receiving unit is additionally operable to after sending the RRC connections and establishing request message, receives the RRC connections that base station is sent
Message is established, the RRC connections establish message and include：The base station is that the UE distributes SR resources；
Dispensing unit accesses the base station for establishing message arrangement SR resources according to the RRC connections.
Preferably, the user equipment further includes：
Second time acquisition unit, for sending the random access lead code to the base station when the user equipment
When, start second timer, until the time for receiving second random access response or second timer record is big
When set threshold value, stop the second timer；
Second judging unit, for when the time that the second timer records being more than set threshold value, release to be
The user of distribution scrambles mark.
As shown from the above technical solution, the present invention provides method, base station and the user of random access in a kind of narrowband systems
Random access response progress multiple step format is issued by redesigning random access procedure, improves random access response by equipment
Information carrying amount, on this basis further by acceptance judging, and by resident frequency point and transmission frequency point separate configuration, to improve
The flexibility of resource allocation reduces resource consumption and time delay that random access failure is brought.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these figures.
Fig. 1 is the signaling diagram of accidental access method in the prior art；
Fig. 2 is the flow chart of accidental access method in the narrowband systems that one embodiment of the invention provides；
Fig. 3 is the flow chart of accidental access method in the narrowband systems that another embodiment of the present invention provides；
Fig. 4 is the signaling diagram of accidental access method in the narrowband systems that another embodiment of the present invention provides；
Fig. 5 is a kind of structural schematic diagram for base station that one embodiment of the invention provides；
Fig. 6 is a kind of structural schematic diagram for user equipment that another embodiment of the present invention provides.
Specific implementation mode
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 describes, 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.
As shown in Fig. 2, Fig. 2 shows the flows of accidental access method in the narrowband systems of one embodiment of the invention offer
Figure, this method comprises the following steps：
Step 201：Base station receives the random access lead code that user equipment (UE) is sent when accessing the base station.
For Fig. 1, the random access lead code in the present embodiment does not change, such as the information of the msg1 in Fig. 1.
Corresponding, the random access lead code in the present embodiment is the msg1 in Fig. 4.
Step 202：Base station obtains the time for adjusting the UE Timing Advances according to the random access lead code
Adjustment amount TA values in advance.
Step 203：Base station sends the first random access response to the UE, and first random access response includes：Institute
State TA values and the scrambling mark of the UE.
For Fig. 4, the first random access response in the present embodiment is the msg2-1 in Fig. 4.First connects at random
Enter response to be generated by the MAC layer of base station, and passes through DSCH Downlink Shared Channel (Down Link-shared Channel, abbreviation DL-
SCH) it is transmitted to UE.
In the present embodiment, the function according to transmission information and portable information content, using issuing method, msg2 step by step
It is divided into 2~N number of sub- message issues respectively, it can solve the problems, such as that transmission information content is limited in this way.Wherein, N indicates positive integer.
Due to being narrowband systems, UE determines the reception frequency point of msg2 according to the mapping relations of msg1 and msg2, and according to
The transmission resource of msg1 determines the user identifier for receiving msg2-1 message, i.e. RA-RNTI.It is same that msg2-1 only carries necessary uplink
Successive step TA values, and distribution T-RNTI.Terminal using the reception frequency point of msg2-1 as interim resident frequency point, on the frequency point with
T-RNTI the subsequent msg2 to be received such as carrys out for new user identifier, until receiving completely all sub- message of msg2.Subsequently
Msg2 can carry more configuration informations, including the resident frequency point etc. that user is final.
Step 204：Base station is when the base station is determined to receive the UE according to the capacity of interface-free resources, to the UE
The second random access response is sent, second random access response includes：Resident frequency point is asked for establishing RRC connections foundation
Ask the transfer resource and power adjustment of message.
For Fig. 4, the second random access response in the present embodiment is the msg2-2 in Fig. 4.Receiving function is
What the control plane at access side group station, the i.e. faces CP were completed, the faces CP determine whether to connect according to the capacity of base station interface-free resources
Receiving some user equipment is linked into this cell, therefore the user plane UP of base station and control plane CP interact residence sub-band in the present embodiment
Relevant configuration information and admission control information, acceptance judging is completed during random access response.Base station has received at random
After access lead code msg1, in addition to the temporal relation constraint being limited between msg1~msg2_1, it is necessary to vertical in stipulated time point
It inscribes outside hair msg2_1, the MAC layer in the base station faces UP also needs to notice and the faces CP, the faces CP is given to be believed according to the required resource capacity of receiving
It ceases, for example physical uplink control channel (Physical Uplink Control Channel, abbreviation PUCCH) resource is
Enough whether distribution carries out acceptance controlling decision by no enough distribution, uplink scheduling request resource SR, and notifies to the MAC in the faces UP
Layer.If resource is enough, acceptance judging success；Otherwise acceptance judging fails, after failure under the second random access response msg2_2
Hair receives refusal instruction, user equipment (UE) to restart random access.
Wherein, the first random access response msg2-1 is used obtains according to the running time-frequency resource for transmitting the random access lead code
To the first user identifier RA-RNTI scrambled；Second random access response msg2-2 is scrambled using T-RNTI.
In the present embodiment, configuration information substep is issued by accidental access response message, reduces single frames and carries configuration
The data volume of information, while acceptance judging shifts to an earlier date, and has also exempted to generate in subsequent step and has received refusal, reduces the random of failure and connects
Interface-free resources waste caused by entering.
Step 205：Base station receives the RRC connections that the UE is sent and establishes request message, and the RRC connections establish request and disappear
Breath is that the UE is sent according to first random access response and the second random access response.
For Fig. 1, the RRC connections in the present embodiment establish request message and do not change, such as the msg3 in Fig. 1
Information.Corresponding, it is the msg3 in Fig. 4 that request message is established in the RRC connections in the present embodiment.
In msg2_2, carries final terminal and be resident frequency point, msg3 transmission frequency points and uplink power control order TPC.Cause
Idling-resource is distributed for be used for transmission msg3, there might not be enough resources that new terminal can be received resident, and has foot
The resident frequency point of enough resource and admission terminals may currently transmit other business, can not distribute the new access terminal of transmission
msg3.So the resource allocation of msg3 frequency points and resident frequency point point is separately configured, the flexible of residence sub-band distribution can be improved
Property.And the load balancing of resident frequency point allocation can be further carried out in this stage, select resident users in all narrowband frequency points
Minimum frequency point is used for the resident frequency point allocation of new access terminal, avoids excessive terminal distribution on the same frequency point.
Step 206：Base station sends RRC connections to the UE and establishes message, and the RRC connections establish message and include：It is described
Base station is the uplink scheduling request SR resources of UE distribution, so that the UE establishes message arrangement SR according to the RRC connections
Resource, to access the base station.
For Fig. 1, the RRC connections in the present embodiment establish request message and do not change, such as the msg4 in Fig. 1
Information.Corresponding, it is the msg4 in Fig. 4 that request message is established in the RRC connections in the present embodiment.
After so msg3 transmission, terminal can then go to monitor on final resident frequency point and authorize, and receive scheduling and complete
Subsequent msg4, msg5 transmission.After the complete msg4 of terminal on receipt determines the success of itself contention access, then T-RNTI is changed into formally
C-RNTI.
Optionally, after the second random access response is sent to UE by base station, start first timer, until receiving institute
When stating RRC connections and establishing time of request message or first timer record and be more than set threshold value, stop described the
One timer, and obtain the time of first timer record at this time；If the time of the first timer record is more than set
Threshold value, then discharge the UE of distribution scrambling mark and SR resources.
In the present embodiment, since the msg2 message for belonging to MAC layer processing sends and receives flow, so the program pertains only to
To the modification of MAC layer, it is not related to high-rise processing modification, better compatibility can be improved.And MAC layer change amount only relates to
And to the update in flow, be not related to be segmented and organize packet module addition because the sub- message of multiple msg2 can be used as it is multiple
Independent message issues, and can have separate processing and generating process, and for the receiving terminal of terminal, each msg2
Sub- message individually receives and processing, need not recombinate.
And issued since msg2 is divided into multiple sub- message, and completion is issued in regular hour window, so right
There is time enough to make decisions and generate for the information that message 2 carries.This for improve narrowband systems msg3 resources
It is helpful with the successful of residence sub-band distribution.
As shown in figure 3, Fig. 3 shows the flow of accidental access method in the narrowband systems that another embodiment of the present invention provides
Figure, this method comprises the following steps：
Step 301：UE in access base station, to the base station send random access lead code so that the base station according to
The random access lead code obtains the TA values for adjusting the UE Timing Advances.
Step 302：UE receives the first random access response that base station is sent, and first random access response is the base
It stands and receives what the random access lead code was sent later, include the scrambling mark of TA values and UE.
In the present embodiment, after UE receives first random response, with the first random response transmission subband used
As interim residence sub-band.
Step 303：UE receives the second random access response that base station is sent, and second random access response is the base
It stands and is sent when being determined to receive the UE, including resident frequency point, the transmission for establishing request message for establishing RRC connections
Resource and power adjustment.
Step 304：UE sends RRC according to first random access response and the second random access response to the base station
Request message is established in connection.
Step 305：UE receives the RRC connections that base station is sent and establishes message, and the RRC connections establish message and include：It is described
Base station is the SR resources of UE distribution.
Step 306：UE establishes message arrangement SR resources according to the RRC connections, accesses the base station.
Optionally, after UE sends random access lead code to base station, start second timer, until receiving described the
When the time of two random access responses or second timer record is more than set threshold value, stop second timing
Device；If the time of the second timer record is more than set threshold value, judge that random access procedure fails, release has divided
The scrambling of the UE matched identifies.
The method of random access in narrowband systems provided in this embodiment will be with by redesigning random access procedure
Machine access response carries out multiple step format and issues, and the information carrying amount of random access response is improved, on this basis further by connecing
It receives judgement, and resident frequency point and transmission frequency point separate configuration is reduced into random access failure to improve the flexibility of resource allocation
The resource consumption and time delay brought.
As shown in figure 4, Fig. 4 shows the flow of accidental access method in the narrowband systems that another embodiment of the present invention provides
Schematic diagram, this method comprises the following steps：
401, random access lead code preamble (msg1) is sent to base station by UE, and starts random access response timing
Device.
402, after base station receives msg1, the random access response (msg2-1) generated by MAC layer is transmitted on DL-SCH.Its
In, T-RNTI, TA are carried in msg2-1.Wherein, msg2-1 is scrambled using RA-RNTI.
After UE receives msg2-1, the subband used using msg2-1 transmission waits for follow-up msg2- as interim residence sub-band
2 message.
403, the faces the UP faces notice CP of base station carry out receiving request.
404, acceptance judging is completed in the faces base station CP, conveys whether receiving succeeds by the faces UP, and it is fixed to start receiving if success
When device.Meanwhile the faces Up assembling msg2-2 is sent to UE.
In this step, if acceptance judging fails, acceptance judging is completed in the base station faces CP, is conveyed by the faces UP and is received refusal, and
The faces UP assembling msg2-2 is sent to UE, and refusal is received in msg2-2 instructions, to which random access procedure fails.
405, after UE receives msg2-2, UE configures msg3 transfer resources according to it, finally resident frequency point and power tune
Whole value.Wherein, the sub- message of msg2-2 is scrambled using T-RNTI.
406, UE sends RRC connections to base station and establishes request message (msg3).
407, base station receive UE RRC connections establish request message after, distribute SR and PUCCH resource, be assigned to
UE sends RRC connections and establishes message (msg4).
408, UE is received after RRC connections establish message, is configured according to it, configuration is replied RRC to base station after completing and connected
It connects foundation and completes message (msg5).
As shown in figure 5, Fig. 5 shows a kind of structural schematic diagram for base station that one embodiment of the invention provides, base station packet
Include receiving unit 501, acquiring unit 502 and transmission unit 503.
Wherein, receiving unit 501, the random access guiding sent for receiving user equipment (UE) when accessing the base station
Code.
Acquiring unit 502, for according to the random access lead code, obtaining for adjusting the UE Timing Advances
TA values.
Transmission unit 503, for sending the first random access response, the first random access response packet to the UE
It includes：The scrambling of the TA values and the UE identify.
Transmission unit 503 is additionally operable to after sending first random access response, in the base station according to interface-free resources
Capacity when being determined to receive the UE, send the second random access response, second random access response to the UE
Including：Resident frequency point, the transfer resource and power adjustment that request message is established for establishing RRC connections.
Request message is established in receiving unit 501, the RRC connections for being additionally operable to receive the UE transmissions, and the RRC connections are established
Request message is that the UE is sent according to first random access response and the second random access response.
Transmission unit 503 is additionally operable to establish message to UE transmission RRC connections, and message package is established in the RRC connections
It includes：The base station is the uplink scheduling request SR resources of UE distribution, so that the UE establishes message according to the RRC connections
SR resources are configured, to access the base station.
Optionally, which further includes first time acquiring unit and the first judging unit.
Wherein, first time acquiring unit is sent to for working as the base station by second random access response described
When UE, start first timer, until receive that the RRC connections establish that request message or the first timer record when
Between be more than set threshold value when, stop the first timer；First judging unit, for being recorded when the first timer
Time be more than set threshold value when, discharge distribution UE scrambling mark and SR resources.
As shown in fig. 6, Fig. 6 shows a kind of structural schematic diagram for user equipment that another embodiment of the present invention provides, it should
User equipment includes transmission unit 601, receiving unit 602 and dispensing unit 603.
Wherein, transmission unit 601, for base station send random access lead code so that the base station according to described in
Machine access lead code obtains the TA values for adjusting UE Timing Advances.
Receiving unit 602, the first random access response for receiving base station transmission, first random access response are
The base station receives what the random access lead code was sent later, includes the response of TA values and the scrambling mark of UE.
Receiving unit 602 is additionally operable to receive the second random access response that base station is sent, second random access response
The base station is sent when being determined to receive the UE, including is resident frequency point, is disappeared for establishing RRC connections foundation request
The transfer resource and power adjustment of breath.
Transmission unit 601 is additionally operable to according to first random access response and the second random access response to the base
Request message is established in transmission RRC connections of standing.
Message is established in receiving unit 602, the RRC connections for being additionally operable to receive base station transmission, and message package is established in the RRC connections
It includes：The base station is the SR resources of UE distribution.
Dispensing unit 603 accesses the base station for establishing message arrangement SR resources according to the RRC connections.
Optionally, which further includes the second time acquisition unit and the second judging unit.
Wherein, the second time acquisition unit, for before the user equipment sends the random access to the base station
When leading code, start second timer, until receive second random access response or the second timer record when
Between be more than set threshold value when, stop the second timer；Second judging unit, for being recorded when the second timer
Time be more than set threshold value when, discharge allocated UE scrambling mark.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, it will be understood by those of ordinary skill in the art that；It still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features；And these modification or
It replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of method of random access in narrowband systems, which is characterized in that this method includes：
Base station receives the random access lead code that user equipment (UE) is sent when accessing the base station；
According to the random access lead code, the time advance adjustment amount TA values for adjusting the UE Timing Advances are obtained；
The first random access response is sent to the UE, first random access response includes：The TA values and the UE's
Scrambling mark；And
When the base station is determined to receive the UE according to the capacity of interface-free resources, the second random access is sent to the UE
Response, second random access response include：Resident frequency point, the transfer resource that request message is established for establishing RRC connections
And power adjustment；
It receives the RRC connections that the UE is sent and establishes request message, it is the UE according to institute that request message is established in the RRC connections
State what the first random access response and the second random access response were sent；
RRC connections are sent to the UE and establish message, and the RRC connections establish message and include：The base station is distributed for the UE
Uplink scheduling request SR resources so that the UE establishes message arrangement SR resources according to the RRC connections, to access the base
It stands.
2. according to the method described in claim 1, it is characterized in that, the method further includes：
After second random access response is sent to the UE by the base station, start first timer, until receiving institute
When stating RRC connections and establishing time of request message or first timer record and be more than set threshold value, stop described the
One timer；
If the time of the first timer record is more than set threshold value, the scrambling mark and SR moneys of the UE of distribution are discharged
Source.
3. according to the method described in claim 1, it is characterized in that, the method further includes：
The base station to the UE send the second random access response when, using the UE scrambling mark to described second with
Machine access response is scrambled, and the second random access response after scrambling is sent to the UE.
4. a kind of method of random access in narrowband systems, which is characterized in that this method includes：
UE sends random access lead code in access base station, to the base station, so that the base station is according to the random access
Lead code obtains the TA values for adjusting the UE Timing Advances；
The first random access response that the base station is sent is received, first random access response is described in the base station receives
It is sent after random access lead code, includes the scrambling mark of TA values and UE；
The second random access response that base station is sent is received, second random access response is that the base station is being determined to connect
Receive the UE when send, including resident frequency point, transfer resource and power adjustment that request message is established for establishing RRC connections
Value；
RRC connections foundation request is sent according to first random access response and the second random access response to the base station to disappear
Breath；
It receives the RRC connections that base station is sent and establishes message, the RRC connections establish message and include：The base station is the UE points
The SR resources matched；
Message arrangement object SR resources are established according to the RRC connections, access the base station.
5. according to the method described in claim 4, it is characterized in that, the method further includes：
After the UE sends the random access lead code to the base station, start second timer, until receiving described the
When the time of two random access responses or second timer record is more than set threshold value, stop second timing
Device；
If the time of the second timer record is more than set threshold value, judge that random access procedure fails, release is
The scrambling of the UE of distribution identifies.
6. according to the method described in claim 4, it is characterized in that, after the UE receives first random response, by institute
The reception frequency point of the first random response transmission is stated as resident frequency point temporarily, waits second random access response to be received.
7. a kind of base station, which is characterized in that the base station includes：
Receiving unit, the random access lead code sent for receiving user equipment (UE) when accessing the base station；
Acquiring unit, for according to the random access lead code, obtaining the TA values for adjusting the UE Timing Advances；
Transmission unit, for sending the first random access response to the UE, first random access response includes：The TA
The scrambling mark of value and the UE；
Transmission unit is additionally operable to after sending first random access response, in the base station according to the capacity of interface-free resources
When being determined to receive the UE, the second random access response is sent to the UE, second random access response includes：It stays
It stays frequency point, establish the transfer resource and power adjustment of request message for establishing RRC connections；
Receiving unit is additionally operable to after sending second random access response, is received the RRC connections foundation that the UE is sent and is asked
Seek message, it is the UE according to first random access response and the second random access that request message is established in the RRC connections
What response was sent；
Transmission unit is additionally operable to after receiving the RRC connections and establishing request message, and sending RRC connections foundation to the UE disappears
Breath, the RRC connections establish message and include：The base station is the uplink scheduling request SR resources of UE distribution, so that described
UE establishes message arrangement SR resources according to the RRC connections, to access the base station.
8. base station according to claim 7, which is characterized in that the base station further includes：
First time acquiring unit, for when second random access response is sent to the UE by the base station, starting
First timer, until receiving, request message is established in the RRC connections or the time of first timer record is more than institute
When the threshold value of setting, stop the first timer；
First judging unit, for when the time that the first timer records being more than set threshold value, release to have distributed
UE scrambling mark and SR resources.
9. a kind of user equipment, which is characterized in that the user equipment includes：
Transmission unit, for sending random access lead code to base station, so that the base station is according to the random access lead code
Obtain the TA values for adjusting UE Timing Advances；
Receiving unit, the first random access response for receiving base station transmission, first random access response are the base
It stands and receives what the random access lead code was sent later, include the response of TA values and the scrambling mark of UE；
Receiving unit is additionally operable to after receiving first random access response, is received the second random access that base station is sent and is rung
It answers, the second random access response base station is sent when being determined to receive the UE, including resident frequency point, use
In the transfer resource and power adjustment of establishing RRC connections and establish request message；
Transmission unit is additionally operable to after receiving second random access response, according to first random access response and the
Two random access responses send RRC connections to the base station and establish request message；
Receiving unit is additionally operable to after sending the RRC connections and establishing request message, is received the RRC connections that base station is sent and is established
Message, the RRC connections establish message and include：The base station is that the UE distributes SR resources；
Dispensing unit accesses the base station for establishing message arrangement SR resources according to the RRC connections.
10. user equipment according to claim 9, which is characterized in that the user equipment further includes：
Second time acquisition unit, for when the user equipment sends the random access lead code to the base station, opening
Dynamic second timer, until receiving the time of second random access response or second timer record more than set
When fixed threshold value, stop the second timer；
Second judging unit, for when the time that the second timer records being more than set threshold value, release to have distributed
UE scrambling mark.
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| CN201410487735.1A CN105451363B (en) | 2014-09-22 | 2014-09-22 | The method of random access, base station and user equipment in narrowband systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108243510B (en) * | 2016-12-27 | 2020-12-04 | 大唐移动通信设备有限公司 | Method and device for allocating context resources to terminal |
| CN109429354B (en) * | 2017-08-31 | 2021-05-18 | 华为技术有限公司 | Random access method and terminal |
| CN109587811B (en) * | 2017-09-28 | 2021-01-15 | 华为技术有限公司 | Information acquisition method and terminal |
| WO2019178729A1 (en) * | 2018-03-19 | 2019-09-26 | 华为技术有限公司 | Random access method and apparatus |
| WO2019213972A1 (en) * | 2018-05-11 | 2019-11-14 | 华为技术有限公司 | Method and apparatus for transmitting random access preamble |
| EP3972374B1 (en) * | 2019-05-24 | 2023-07-12 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and device for random access |
| CN111445337A (en) * | 2020-05-21 | 2020-07-24 | 北京光宇之勋科技有限公司 | Method and system for transmitting account information associated with block chain based on 5G mobile terminal |
| CN112887930A (en) * | 2021-01-25 | 2021-06-01 | 温州职业技术学院 | Sensor sensing information high-speed uploading method and system based on Internet of things |
| CN114390641A (en) * | 2022-02-15 | 2022-04-22 | 赛特斯信息科技股份有限公司 | Method for initially accessing terminal to base station |
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