CN104838717B - A kind of method and apparatus of random access - Google Patents
A kind of method and apparatus of random access Download PDFInfo
- Publication number
- CN104838717B CN104838717B CN201380001462.9A CN201380001462A CN104838717B CN 104838717 B CN104838717 B CN 104838717B CN 201380001462 A CN201380001462 A CN 201380001462A CN 104838717 B CN104838717 B CN 104838717B
- Authority
- CN
- China
- Prior art keywords
- leading
- transmission
- power
- transmission power
- random access
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
A kind of method and apparatus of random access, the method includes：User equipment (UE) receives the first random access that network side is sent and triggers signaling, and it is leading that the first random access triggering signaling carries first；The UE is leading with the first transmission power transmission described first；When the UE does not receive the described first leading response message of network side transmission and the UE receives leading the second random access of carrying second of network side transmission and triggers signaling, the UE is leading with the second transmission power transmission described second, and second transmission power is more than first transmission power.The success rate of random access can be improved by implementing the method and apparatus of random access provided by the present invention.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of method and apparatus of random access.
Background technology
Random access（Random access, RA）Process is for establishing user equipment（User equipment, UE）With base
It stands（For example, evolved base station e-NB）Uplink synchronous, by the sub-frame of uplink for random access that configures in systems
Use Physical Random Access Channel（Physical random access channel, PRACH）Send random access guiding
（preamble）, and receive the random access response of base station feedback（Random access response, RAR）, realize uplink
It is synchronous.Random access includes competition random access and non-competing random access both of which.
Referring to FIG. 1, it is a kind of signal flow diagram of non-competing random access procedure of the prior art, as shown, non-competing
Random access procedure is striven to include the following steps：
100：E-NB is that UE distribution RA is leading；
102：It is leading for the RA of its distribution that UE sends e-NB；
104：E-NB receive UE transmission RA it is leading after, feed back RAR.
During the above random access, if UE fails to receive the RAR of base station feedback, UE can increase transmission work(
Rate retransmits the random access guiding, and when reaching maximum retransmission, should if not receiving corresponding RAR also
Random access failure.
In addition, if UE fails to receive, e-NB is leading for the RA of its distribution, and UE can not actively initiate random access, lead
Cause random access failure.
Currently, the probability of random access failure or relatively high, needs to be further decreased.
Invention content
Purpose of the embodiment of the present invention is, provides a kind of method and apparatus of random access, can improve random access
Success rate.
In order to solve the above-mentioned technical problem, according to a first aspect of the embodiments of the present invention, an embodiment of the present invention provides one
The method of kind random access, including：
User equipment (UE) receives the first random access that network side is sent and triggers signaling, the first random access triggering letter
Enable carrying first leading；
The UE is leading with the first transmission power transmission described first；
When the UE do not receive network side transmission the described first leading response message and the UE receive network
Side send carrying second it is leading the second random access triggering signaling when, the UE with the second transmission power send described second
Leading, second transmission power is more than first transmission power.
As the first possible realization method of the first aspect, second transmission power is sent with described first
The power step of positive integer times is differed between power.
In conjunction with the possible realization method of the first of the first aspect or the first aspect, described first is additionally provided
Second of possible realization method of aspect, the carrying second that network side transmission is received in the UE leading second connect at random
Enter before triggering signaling, further includes：The UE initiates the described first leading re-transmission, and the transmission power retransmitted is more than described the
One transmission power.
In conjunction with second of possible realization method of the first aspect, the third for additionally providing the first aspect can
The realization method of energy, the UE initiate the described first leading re-transmission, including：After transmission described first is leading, the UE
The described first leading response message of network side transmission is not received in preset time, then the UE is with the first transmission power
Based on, transmission power is lifted at least one power step size；The described first leading weight is initiated with the transmission power after lifting
It passes.
In conjunction with the third possible realization method of the first aspect, additionally provide the first aspect the 4th kind can
Can realization method, after the UE initiates the first leading re-transmission for the first time, and initiate at least once before described first
The re-transmission led, wherein the condition that the UE initiates to retransmit is：After the first leading re-transmission described in last time, the UE is pre-
If the described first leading response message of network side transmission is not received in the time；It is heavy every time and since retransmitting second
Before biography, the UE is lifted at least one power step size based on the transmission power that last time retransmits, by transmission power, and with lift
Transmission power after rising is initiated to retransmit every time.
In conjunction with second of the first aspect, the third or the 4th kind of possible realization method, described is additionally provided
5th kind of possible realization method of one side, the UE is leading with second signal transmission power transmission described second, including：
After initiating last time re-transmission, the UE does not receive the described first leading response of network side transmission in preset time
Message, and the UE receives the second random access triggering signaling, then the transmission work(that the UE is retransmitted with last time
Based on rate, transmission power is lifted at least one power step size；It is leading that described second is sent with the transmission power after lifting.
According to a second aspect of the embodiments of the present invention, an embodiment of the present invention provides a kind of accidental access devices, including：
Receiving unit, the first random access for receiving network side transmission trigger signaling, and first random access touches
It is leading that signaling carries first；
Access unit, it is leading for sending described first with the first transmission power；
The receiving unit is additionally operable to the case where not receiving the described first leading response message of network side transmission
Under, receive leading the second random access triggering signaling of the carrying second of network side transmission；
The access unit, is additionally operable to send with the second transmission power described second leading, and second transmission power is big
In first transmission power.
As the first possible realization method of the second aspect, second transmission power is sent with described first
The power step size of positive integer times is differed between power.
In conjunction with the possible realization method of the first of the second aspect or the second aspect, described second is additionally provided
Second of possible realization method of aspect, described device further include：Trigger element, described in being received in the receiving unit
Second random access triggers power before triggering signaling and is lifted unit；It is lifted unit with power, for carrying out lifting transmission power
Processing；The access unit is additionally operable to leading with the transmission power initiation described first after power lifting unit lifting
Re-transmission.
In conjunction with second of possible realization method of the second aspect, the third for additionally providing the second aspect can
The realization method of energy, the trigger element are specifically used for：After access unit transmission described first is leading, if described
Receiving unit does not receive the described first leading response message of network side transmission in preset time, then triggers the power
It is lifted unit；The power lifting unit is specifically used for：Based on the first transmission power, transmission power is lifted at least one
Power step size；The access unit is specifically used for, and the described first leading re-transmission is initiated with the transmission power after lifting.
In conjunction with the third possible realization method of the second aspect, additionally provide the second aspect the 4th kind can
The realization method of energy, after the access unit initiates the first leading re-transmission for the first time：The trigger element is specific
It is additionally operable to trigger the power lifting unit at least one times, and the trigger element triggers the item of the power lifting unit
Part is：After the first leading re-transmission described in the last time that the access unit is initiated, the receiving unit is in preset time
The described first leading response message of network side transmission is not received；The power lifting unit is specifically additionally operable to：With last time
Based on the transmission power of re-transmission, transmission power is lifted at least one power step size；The access unit is specifically used for, with lift
Transmission power after rising is initiated to retransmit every time.
In conjunction with second of the second aspect, the third or the 4th kind of possible realization method, described is additionally provided
5th kind of possible realization method of two aspects, the trigger element are additionally operable to：It is retransmitted in the last time of the access unit
Later, if the receiving unit does not receive the described first leading response message of network side transmission in preset time,
And the receiving unit receives the second random access triggering signaling, then triggers the power lifting unit；The work(
Rate lifting unit is additionally operable to：Based on the transmission power that access unit last time retransmits, transmission power is raised to
A few power step size；The access unit is specifically used for：Institute is sent with the transmission power after power lifting unit lifting
It is leading to state second.
Compared with prior art, the success rate of random access can be improved by implementing embodiment provided by the present invention.
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
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of signal flow diagram of non-competing random access procedure of the prior art；
Fig. 2 is the flow diagram according to the accidental access method of an embodiment of the present invention；
Fig. 3 is the block schematic diagram according to the accidental access device of an embodiment of the present invention；
Fig. 4 is the block schematic diagram according to the accidental access device of an embodiment of the present invention；
Fig. 5 is the block schematic diagram according to the accidental access device of an embodiment of the present invention.
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, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
In view of in the prior art, e-NB distributes leading order for UE and only sends once, if the order is lost, UE
Random access will not be actively initiated, random access failure is caused.For this purpose, it is once before UE is distributed that can set e-NB and retransmit
The order led is accessed again with triggering UE.
However, when UE receives the order of e-NB retransmissions, UE can continue original random access procedure, also may be used
To re-initiate new random access.For example, UE is not when receiving the RAR of e-NB feedbacks, the transmission power that risen is sent out again
Random access guiding is sent, at this point, the leading order of new distribution that e-NB issues is had received again, if UE is used before new distribution
Carried in the order led it is leading re-initiate random access, then soaring power starts to add up again, due to power
Reason e-NB will continue to can not receive leading, lead to random access failure；If UE continues original random access procedure, send old
It is leading, due to leading timeliness, e-NB will not be responded old leading and be issued RAR, also result in random access failure.
For this purpose, in following embodiment, when it is that UE distributes leading order that UE, which receives e-NB retransmissions, UE is kept
Continue to climb based on the power or the power to rise in original random access procedure that rise in random access procedure originally
It rises, and the leading initiation random access redistributed for it using e-NB.In this way, can reduce random caused by power reason
The probability of access failure, meanwhile, also solve the problems, such as the random access failure caused by leading timeliness.
Fig. 2 is according to the flow diagram of the method for the random access of an embodiment of the present invention, with reference to Fig. 2, this method
Including：
200：User equipment（UE）It receives the first random access that network side is sent and triggers signaling, first random access
It is leading to trigger signaling carrying first.
Illustratively, the first random access triggering signaling may include：Network side actively triggers the signaling of random access,
For example, Physical Downlink Control Channel（PDCCH）Signaling, the switching command or MAC layer signaling for switching that e-NB is sent.
202：The UE is leading with the first transmission power transmission described first.
Illustratively, first transmission power can be the initial transmission power being pre-configured, and can also be by letter
The transmission power that the methods of road quality estimation determines, the embodiment of the present invention do not do this any restrictions.
204：When the UE do not receive network side transmission the described first leading response message and the UE receive
Network side send carrying second it is leading the second random access triggering signaling when, the UE with the second transmission power send described in
Second is leading, and second transmission power is more than first transmission power, such as：Second transmission power and described first
The power step size of positive integer times is differed between transmission power.
It will be appreciated by those skilled in the art that the first random access triggering signaling referred in the present invention connects at random with second
Enter to trigger the signaling that signaling can be same format, the description using " first ", " second " is existed to random access triggering signaling
Time is spatially distinguish.Equally, first is leading and second is leading can be identical leading, before can also being different
It leads, the description using " first ", " second " is distinguish in the time or spatially to leading.
Optionally, in a kind of realization method of the present embodiment, the carrying second of network side transmission is received in the UE
Before leading the second random access triggering signaling, the UE can also initiate the described first leading re-transmission, and the transmission retransmitted
Power is more than first transmission power.Such as：After leading with the first transmission power transmission described first, the UE is pre-
If not receiving the described first leading response message of network side transmission in the time, then the UE is using the first transmission power as base
Transmission power is lifted at least one power step size by plinth, then initiates the described first leading weight with the transmission power after lifting
It passes.Further, after the UE initiates the first leading re-transmission for the first time, at least once described the can also be initiated again
One leading re-transmission, wherein the condition that the UE initiates to retransmit is：After the first leading re-transmission described in last time, the UE
The described first leading response message of network side transmission is not received in preset time；And since retransmitting second
（I.e.：Since the re-transmission after the described first leading re-transmission of first time that the UE is initiated）, before retransmitting every time, the UE
Based on the transmission power that last time retransmits, transmission power is lifted at least one power step size, and with the transmission work(after lifting
Rate is initiated to retransmit every time.
Optionally, in a kind of realization method of the present embodiment, after initiating last time and retransmitting, the UE is default
The described first leading response message of network side transmission is not received in time, and the UE receives described second at random
Access triggers signaling, then transmission power is lifted at least one work(by the UE based on the transmission power that last time retransmits
Rate step-length；Then it is leading to send described second with the transmission power after lifting.It should be noted that the present embodiment is to described first
The number of leading re-transmission limits：Directly limit number of retransmissions, or by limit adjacent interval time retransmitted twice with
And the total time of retransmission process limits number of retransmissions indirectly.
It will be appreciated by those skilled in the art that the can be regarded as by carrying the second leading second random access triggering signaling
One random access triggers the re-transmission of signaling, and in this re-transmission, and the leading of carrying can be different, can also be identical.Equally, 204
Later, if second random access failure, the re-transmission of the second random access triggering signaling can be carried out, and this is heavy
Crossing, the leading of carrying can be different, can also be identical.Further carry out power ramp and with it is newer it is leading carry out it is new with
Machine access procedure.
The method for the random access that the present embodiment is provided so that UE can be used newly during random access
Random access triggers signaling（In the present embodiment, i.e., described second random access triggers signaling）Middle carrying it is leading（Also known as it
For Special leader）（In the present embodiment, i.e., described second is leading）, using the signal transmitting power after soaring（In the present embodiment
In, i.e., the described second signal transmission power）Rather than use initial power（In the present embodiment, i.e., described first signal is sent
Power）New random access is initiated, the success rate of random access is effectively increased.
By taking random access triggering signaling is PDCCH orders as an example, according to the random access of an embodiment of the present invention
In method, the method includes：
Step 1：UE receives the leading PDCCH orders of carrying first that evolved base station e-NB is issued, then uses first
Transmission power uses first the first random access of leading progress.Since transmission power is relatively low, before e-NB is not resolved to first
Lead, then e-NB will not be sent to UE indicate random access successful response message (such as：Random Access Response,
RAR）.
Step 2：UE is in the preset time for initiating the first random access（For example, 10ms（Millisecond））Afterwards, work(is sent with first
Signal transmitting power is risen based on rate and 1 power step size and retransmits the first random access using first leading first time and believes
Number, but not to be resolved to first still leading by e-NB.
Step 3：UE is after the preset time that first time retransmits the first accidental access signal, based on the first transmission power
Signal transmitting power is risen and 2 power step sizes and retransmits the first accidental access signal, but e-NB using first leading second
It is leading not to be resolved to first still.
Step 4, UE receives e-NB due to not connecing after second is retransmitted the preset time of the first accidental access signal
The leading PDCCH orders of the first carrying second that is leading and re-issuing are received, then UE enablings second are leading and with the first hair
It send and signal transmitting power 3 power step sizes that rise is subjected to the second random access based on power.If power is enough, e-NB is just
It can successfully be resolved to second leading, and then be sent to UE and indicate the successful response message of random access；It, can be with if underpower
Continue to repeat the operation similar to step 2~4.
Fig. 3 is according to the block schematic diagram of the accidental access device of an embodiment of the present invention, with reference to Fig. 3, random access
Device 3 includes receiving unit 30 and access unit 32, is illustrated separately below.
Receiving unit 30, the first random access for receiving network side transmission trigger signaling, first random access
It is leading to trigger signaling carrying first.Illustratively, the first random access triggering signaling may include：Network side actively triggering with
The signaling of machine access, for example, Physical Downlink Control Channel（PDCCH）Signaling, the switching command for switching that e-NB is sent, or
MAC layer signaling.
Access unit 32, it is leading for sending described first with the first transmission power.
Receiving unit 30 is additionally operable to the case where not receiving the described first leading response message of network side transmission
Under, receive leading the second random access triggering signaling of the carrying second of network side transmission.
Access unit 32, is additionally operable to send with the second transmission power described second leading, and second transmission power is more than
First transmission power, such as：The work(of positive integer times is differed between second transmission power and first transmission power
Rate step-length.
Optionally, in a kind of realization method of the present embodiment, the receiving unit 30 is additionally operable to receive the lateral institute of network
State the random access response of the transmission of accidental access device 3.Such as：The access unit 32 send described second it is leading after, such as
Fruit network side（Such as：e-NB）It is successfully resolved to described second leading, then sends random access to the accidental access device 3 and ring
It answers.
The accidental access device 3 that the present embodiment is provided can effectively improve the success rate of random access.
Fig. 4 is according to the block schematic diagram of the accidental access device of an embodiment of the present invention, with reference to Fig. 4, random access
Device 4 includes that receiving unit 40, access unit 42, trigger element 44 and power are lifted unit 46.It illustrates separately below.
Receiving unit 40 has the repertoire of the receiving unit 30 in embodiment illustrated in fig. 3.
Trigger element 44, for triggering work(before the receiving unit 30 receives the second random access triggering signaling
Rate is lifted unit 46.
Power is lifted unit 46, the processing for carrying out lifting transmission power.
Access unit 42 is additionally operable to other than the repertoire with the access unit 32 in embodiment illustrated in fig. 3 with institute
It states the transmission power after power lifting unit 46 is lifted and initiates the described first leading re-transmission.
Optionally, in a kind of realization method of the present embodiment：
Trigger element 44 is specifically used for：The access unit 42 send described first it is leading after, if the reception
Unit 40 does not receive the described first leading response message of network side transmission in preset time, then triggers the power lift
Rise unit 46；
Power lifting unit 46 is specifically used for：Based on the first transmission power, transmission power is lifted at least one work(
Rate step-length；
Access unit 42 is specifically used for, and the described first leading re-transmission is initiated with the transmission power after lifting.
Further, after the access unit 42 initiates the first leading re-transmission for the first time：
The trigger element 44 is specifically additionally operable to trigger the power lifting unit 46 at least one times, and the triggering
The condition that unit 44 triggers power lifting unit 46 is：First was leading described in the last time that the access unit 42 is initiated
After re-transmission, the described first leading response that the receiving unit 40 does not receive network side transmission in preset time disappears
Breath；
The power lifting unit 46 is specifically additionally operable to：Based on the transmission power that last time retransmits, transmission power is lifted
Rise at least one power step size；
The access unit 42 is specifically used for, and initiates to retransmit every time with the transmission power after lifting.
Optionally, in a kind of realization method of the present embodiment：
The trigger element 44 is additionally operable to：After the last time of the access unit 42 retransmits, if the reception
Unit 40 does not receive the described first leading response message of network side transmission, and the receiving unit in preset time
40 receive the second random access triggering signaling, then trigger the power lifting unit 46；
The power lifting unit 46 is additionally operable at this time：It is with the transmission power that the access unit 42 retransmits for the last time
Transmission power is lifted at least one power step size by basis；
The access unit 42 is specifically used at this time：Transmission power after being lifted with power lifting unit 46 sends institute
It is leading to state second.
The accidental access device 4 that the present embodiment is provided can carry out at least once during carrying out random access
The repeating transmission of random access, and with soaring transmission power, can be used after receiving newer random access triggering signaling
Newer leading carry out random access, to effectively improve the success rate of random access.
Fig. 5 is according to the block schematic diagram of the accidental access device of an embodiment of the present invention, with reference to Fig. 5, random access
Device 5 includes：It receiver 51, transmitter 52, memory 53 and is connect with the receiver 51, transmitter 52 and memory 53
Processor 54, wherein it is following so that processor 54 calls to realize that the memory 53 is stored with various program or applications
Function：
The first random access that network side is sent, which is received, by the receiver 51 triggers signaling, first random access
It is leading to trigger signaling carrying first；
It is leading with the first transmission power transmission described first by the transmitter 52；
When not by the receiver 51 receive network side transmission the described first leading response message and pass through institute
State receiver 51 receive network side transmission carrying second it is leading the second random access triggering signaling when, pass through the transmitting
Machine 52 is leading with the second transmission power transmission described second, and second transmission power is more than first transmission power, such as：
The power step size of positive integer times is differed between second transmission power and first transmission power.
Optionally, it in a kind of realization method of the present embodiment, is sent receiving network side by the receiver 51
Carrying second it is leading the second random access triggering signaling before, the processor 54 is additionally operable to：Pass through the transmitter 52
The described first leading re-transmission is initiated, and the transmission power retransmitted is more than first transmission power.Such as：Passing through the hair
Penetrate machine 52 send described first it is leading after, the accidental access device 5 is not connect by the receiver 51 in preset time
The described first leading response message is received, then transmission power is lifted by the processor 54 based on the first transmission power
Then at least one power step size initiates the described first leading weight by the transmitter 52 with the transmission power after lifting
It passes.Further, if the described first leading re-transmission failure, the processor 54 can pass through the transmitter for the first time
52 initiate the described first leading re-transmission at least once again, and the condition for initiating to retransmit at this time is：First was leading described in last time
After re-transmission, the accidental access device 5 does not receive the institute of network side transmission in preset time by the receiver 51
State the first leading response message；And since retransmitting second, before retransmitting every time, the processor 54 was retransmitted with last time
Transmission power based on, transmission power is lifted at least one power step size, and by the transmitter 52 with lifting after
Transmission power is initiated to retransmit every time.
Optionally, it in a kind of realization method of the present embodiment, is initiated by the transmitter 52 in the processor 54
After last time retransmits, the accidental access device 5 does not receive described the in preset time by the receiver 51
One leading response message, and the accidental access device 5 receives second random access by the receiver 51
Signaling is triggered, then transmission power is lifted at least one by the processor 54 based on the transmission power that last time retransmits
Then it is leading to send described second by the transmitter 52 with the transmission power after lifting for power step size.
One of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer read/write memory medium
In, the program is when being executed, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory（Read-Only Memory, ROM）Or random access memory（Random Access
Memory, RAM）Deng.
It is above disclosed to be only a preferred embodiment of the present invention, the power of the present invention cannot be limited with this certainly
Sharp range, therefore equivalent changes made in accordance with the claims of the present invention, are still within the scope of the present invention.
Claims (12)
1. a kind of method of random access, which is characterized in that the method includes：
User equipment (UE) receives the first random access that network side is sent and triggers signaling, and the first random access triggering signaling is taken
Band first is leading；
The UE is leading with the first transmission power transmission described first；
When the UE do not receive network side transmission the described first leading response message and the UE receive network side hair
When leading the second random access triggering signaling of the carrying second sent, before the UE sends described second with the second transmission power
It leads, second transmission power is more than first transmission power.
2. method as described in claim 1, which is characterized in that phase between second transmission power and first transmission power
The power step size of poor positive integer times.
3. method as claimed in claim 1 or 2, which is characterized in that before the carrying second that the UE receives network side transmission
Before the second random access triggering signaling led, further include：
The UE initiates the described first leading re-transmission, and the transmission power retransmitted is more than first transmission power.
4. method as claimed in claim 3, which is characterized in that the UE initiates the described first leading re-transmission, including：
After transmission described first is leading, it is leading that the UE does not receive network side is sent described first in preset time
Response message, then the UE transmission power is lifted at least one power step size based on the first transmission power；
The described first leading re-transmission is initiated with the transmission power after lifting.
5. method as claimed in claim 4, which is characterized in that after the UE initiates the first leading re-transmission for the first time,
The described first leading re-transmission at least once is initiated again, wherein
The condition that the UE initiates to retransmit is：After the first leading re-transmission described in last time, the UE in preset time not
Receive the described first leading response message of network side transmission；
And since retransmitting second, before retransmitting every time, the UE will send work(based on the transmission power that last time retransmits
Rate is lifted at least one power step size, and initiates to retransmit every time with the transmission power after lifting.
6. method as claimed in claim 3, which is characterized in that before the UE sends described second with second signal transmission power
It leads, including：
After initiating last time and retransmitting, it is leading that the UE does not receive network side is sent described first in preset time
Response message, and the UE receives second random access triggering signaling, then the UE is retransmitted with last time
Based on transmission power, transmission power is lifted at least one power step size；
It is leading that described second is sent with the transmission power after lifting.
7. a kind of accidental access device, which is characterized in that described device includes：
Receiving unit, the first random access for receiving network side transmission trigger signaling, the first random access triggering letter
Enable carrying first leading；
Access unit, it is leading for sending described first with the first transmission power；
The receiving unit is additionally operable in the case where not receiving the described first leading response message of network side transmission,
Receive leading the second random access triggering signaling of the carrying second of network side transmission；
The access unit, is additionally operable to send with the second transmission power described second leading, and second transmission power is more than institute
State the first transmission power.
8. device as claimed in claim 7, which is characterized in that phase between second transmission power and first transmission power
The power step size of poor positive integer times.
9. such as claim 7 or 8 described devices, which is characterized in that described device further includes：
Trigger element, it is single for triggering power lifting before the receiving unit receives the second random access triggering signaling
Member, and
Power is lifted unit, the processing for carrying out lifting transmission power；
The access unit is additionally operable to initiate the described first leading weight with the transmission power after power lifting unit lifting
It passes.
10. device as claimed in claim 9, it is characterised in that：
The trigger element is specifically used for：After access unit transmission described first is leading, if the receiving unit
It is single then to trigger the power lifting for the described first leading response message for not receiving network side transmission in preset time
Member；
The power lifting unit is specifically used for：Based on the first transmission power, transmission power is lifted at least one power
Step-length；
The access unit is specifically used for, and the described first leading re-transmission is initiated with the transmission power after lifting.
11. device as claimed in claim 10, which is characterized in that it is leading to initiate first time described first in the access unit
After re-transmission：
The trigger element is specifically additionally operable to trigger the power lifting unit at least one times, and the trigger element triggers
The condition of power lifting unit is：It is described after the first leading re-transmission described in the last time that the access unit is initiated
Receiving unit does not receive the described first leading response message of network side transmission in preset time；
The power lifting unit is specifically additionally operable to：Based on the transmission power that last time retransmits, at least by transmission power lifting
One power step size；
The access unit is specifically used for, and initiates to retransmit every time with the transmission power after lifting.
12. device as claimed in claim 9, it is characterised in that：The trigger element is additionally operable to：In the last of the access unit
After primary re-transmission, if the receiving unit does not receive the described first leading sound of network side transmission in preset time
Message is answered, and the receiving unit receives the second random access triggering signaling, then triggers the power lifting unit；
The power lifting unit is additionally operable to：Based on the transmission power that access unit last time retransmits, it will send
Power is lifted at least one power step size；
The access unit is specifically used for：It is leading that described second is sent with the transmission power after power lifting unit lifting.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013076880 | 2013-06-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104838717A CN104838717A (en) | 2015-08-12 |
| CN104838717B true CN104838717B (en) | 2018-09-28 |
Family
ID=53814902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380001462.9A Active CN104838717B (en) | 2013-06-06 | 2013-06-06 | A kind of method and apparatus of random access |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104838717B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019056385A1 (en) * | 2017-09-25 | 2019-03-28 | 北京小米移动软件有限公司 | Random access method and device, user equipment, and computer readable storage medium |
| CN110392442B (en) * | 2018-04-18 | 2022-06-14 | 华为技术有限公司 | Communication method and device |
| CN110708750B (en) * | 2018-07-09 | 2021-06-22 | 华为技术有限公司 | Power adjustment method, terminal and storage medium |
| WO2020011163A1 (en) * | 2018-07-09 | 2020-01-16 | 华为技术有限公司 | Power adjustment method, terminal and storage medium |
| JP7413349B2 (en) * | 2018-08-31 | 2024-01-15 | 富士通株式会社 | Random access method, data reception method and device, communication system |
| CN110958715A (en) * | 2018-09-26 | 2020-04-03 | 华为技术有限公司 | Method for sending and receiving random access preamble and communication device |
| CN109640388A (en) * | 2019-01-08 | 2019-04-16 | 维沃移动通信有限公司 | A kind of control method and terminal of transmission power |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101248684A (en) * | 2005-08-23 | 2008-08-20 | Lg电子株式会社 | Method of transmitting and receiving a message via an uplink channel in a wireless mobile communication system |
| CN101404810A (en) * | 2007-10-02 | 2009-04-08 | 日本电气株式会社 | Method and device for allocating common channel resources |
| CN101478827A (en) * | 2008-01-04 | 2009-07-08 | 华为技术有限公司 | Method, system and apparatus for retransmitting preamble signature |
| EP2192798A1 (en) * | 2007-09-18 | 2010-06-02 | Sharp Kabushiki Kaisha | Radio communication system, base station device, mobile station device, and random access method |
| CN102036326A (en) * | 2009-09-25 | 2011-04-27 | 华为技术有限公司 | Random access measurement method, switching delay optimization method, device and system |
-
2013
- 2013-06-06 CN CN201380001462.9A patent/CN104838717B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101248684A (en) * | 2005-08-23 | 2008-08-20 | Lg电子株式会社 | Method of transmitting and receiving a message via an uplink channel in a wireless mobile communication system |
| EP2192798A1 (en) * | 2007-09-18 | 2010-06-02 | Sharp Kabushiki Kaisha | Radio communication system, base station device, mobile station device, and random access method |
| CN101404810A (en) * | 2007-10-02 | 2009-04-08 | 日本电气株式会社 | Method and device for allocating common channel resources |
| CN101478827A (en) * | 2008-01-04 | 2009-07-08 | 华为技术有限公司 | Method, system and apparatus for retransmitting preamble signature |
| CN102036326A (en) * | 2009-09-25 | 2011-04-27 | 华为技术有限公司 | Random access measurement method, switching delay optimization method, device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104838717A (en) | 2015-08-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104838717B (en) | A kind of method and apparatus of random access | |
| US11272472B2 (en) | System and scheme for uplink synchronization for small data transmissions | |
| US20220385405A1 (en) | Ceasing transmission repetitions | |
| US10405355B2 (en) | LTE RACH procedure enhancement | |
| JP2021508961A (en) | Methods and equipment for handling bandwidth partial inactivity timers in wireless communication systems | |
| US11838128B2 (en) | Triggering HARQ-ACK feedback for a downlink slot set | |
| CN101971547B (en) | HARQ process is effectively utilized to carry out semi-continuous and method and apparatus that is dynamic data transmission | |
| CN102893548B (en) | For the method and apparatus of controls transfer carrier wave deexcitation | |
| CN103370970B (en) | HARQ-ACK information in the TDD system of the downlink with carrier aggregation generates and HARQ-ACK signal power controls | |
| CN111615859A (en) | Activating a bandwidth part | |
| CN102595634B (en) | Method for receiving random access response information in carrier aggregation | |
| CN102158972B (en) | Method of data transmission and device | |
| KR101799417B1 (en) | Method, system and device for determining transmission link type | |
| JP2014514841A (en) | Method and apparatus for managing a plurality of timing advance groups in a wireless communication system supporting carrier aggregation | |
| US20120182878A1 (en) | Uplink hybrid automatic repeat request method and device in a transparent relay network | |
| KR101689864B1 (en) | Method and apparatus for controlling cross-carrier scheduling | |
| WO2012176602A1 (en) | Mobile communication system, base station device, mobile station device, communication method and integrated circuit | |
| WO2018184471A1 (en) | Method for sending scheduling information and network device | |
| CN102164029A (en) | Method and device for transmitting ACK (acknowledgement)/NACK (negative acknowledgement) feedback information | |
| CN106301444A (en) | Apparatus for radio frequency processing and processing method | |
| CN101814980B (en) | Method and device for realizing repeat ACK/NACK transmission | |
| US20140036817A1 (en) | Method of Handling Random Access Channel Procedure and Related Communication Device | |
| CA2922769A1 (en) | Data sending method and device in spectrum aggregation | |
| CN105827376B (en) | A kind of method and device carrying out HARQ feedback | |
| CN107615813A (en) | A kind of uplink data transmission method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |