CN105979594B - A kind of accidental access method and device based on resource allocation - Google Patents
A kind of accidental access method and device based on resource allocation Download PDFInfo
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- CN105979594B CN105979594B CN201610399259.7A CN201610399259A CN105979594B CN 105979594 B CN105979594 B CN 105979594B CN 201610399259 A CN201610399259 A CN 201610399259A CN 105979594 B CN105979594 B CN 105979594B
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/52—Allocation or scheduling criteria for wireless resources based on load
Abstract
The embodiment of the invention discloses a kind of accidental access method and device based on resource allocation is applied to the network equipment, this method comprises: obtaining the quantity of new incoming terminal in current period and retransmitting terminal quantity；Determine that the resource allocation of the PRACH and PUSCH of current period and maximum are successfully accessed terminal quantity according to the quantity of incoming terminal new in the current period and re-transmission terminal quantity；Judge whether the quantity of the new incoming terminal is not more than the maximum and is successfully accessed terminal quantity；If so, allowing whole new incoming terminals according to the default random access of the resource allocation progress current period of the PRACH and PUSCH；If it is not, then carrying out random access according to the corresponding random number currently obtained of the new incoming terminal and restriction factor.Re-transmission terminal can be improved using the program and be successfully accessed rate in current period, average access delay substantially reduces.
Description
Technical field
The present invention relates to wireless communication technique field, in particular to a kind of accidental access method and dress based on resource allocation
It sets.
Background technique
With the development of Internet of Things high speed, there can be the internet-of-things terminal of magnanimity in following cordless communication network.Work as machine
When the demanding terminal access network communicated between device and machine (Machine-to-Machine, M2M), completed using up channel
Random access simultaneously carries out data transmission, wherein Physical Random Access Channel (Physical Random Access Channel,
PRACH) be used for leader sequence transmission, Physical Uplink Shared Channel (Physical Uplink Shared Channel,
PUSCH) it is used for the transmission of data.
Random access is the first step of accessing terminal to network, the random access of LTE (Long Term Evolution) system
It is general to be realized by following steps:
Step 1: terminal is randomly chosen a leader sequence, and 3GPP LTE provides each cell for competing random access
Most leader sequence numbers be 64, terminal equiprobably therefrom randomly choose a leader sequence, and on prach to need
The network equipment that establish communication connection therewith sends the leader sequence of selection, carries out random access trial.
Step 2: the network equipment receives the leader sequence that terminal is sent by PRACH, detects the mark of the leader sequence,
Then the network equipment sends random access response information (RAR) corresponding with the mark by Physical Downlink Shared Channel.Its
In, RAR carries the mark of leader sequence detected, PUSCH resource information, the Timing Advance parameter of uplink synchronous and interim
Cell-radio network mark.
Step 3: after terminal is properly received RAR, when being sent according to the Timing Advance parameter adjustment own signal received
Between, scheduling information is sent to the network equipment on the corresponding PUSCH of PUSCH resource information that RAR is carried.In step 1, such as
Fruit two and the same leader sequence of more than two terminal simultaneous selections, then these terminals will receive identical RAR, and identical
Different scheduling informations is sent on PUSCH, scheduling informations multiple in this way interfere with each other, and prevent the network equipment from translating any letter
Breath.
Step 4: after the network equipment receives scheduling information, if the scheduling information can be translated accurately, passing through physics
DSCH Downlink Shared Channel sends contention resolution message to corresponding terminal.
Step 5: after terminal receives contention resolution message, establishing and communicate to connect with the network equipment, show random access
Success.
However, PRACH and PUSCH resource is limited, it cannot be guaranteed that all terminals can be successfully accessed and send data,
If the network equipment cannot translate any information, terminal does not just receive contention resolution message, shows that terminal is sent leading
Sequence is collided, random access failure.
The terminal of random access failure can initiate again random access request in next period, and such terminal is generally referred to as
Retransmit terminal.If the terminal (new incoming terminal) for largely initiating random access request for the first time and the re-transmission terminal in a upper period are same
Shi Jingzheng PRACH and PUSCH resource, is successfully accessed quantity more than maximum, and it will cause the collisions of more serious leader sequence to ask
Topic especially will lead to re-transmission terminal and constantly fail in each random access cut-and-try process, causes re-transmission terminal quantity continuous
Increase, so as to cause low, the average longer problem of access delay that is successfully accessed rate for retransmitting terminal.
Summary of the invention
The embodiment of the invention discloses a kind of accidental access method and device based on resource allocation, it is traditional for solving
Re-transmission access success rate of terminal present in accidental access method is low, the average longer problem of access delay.Technical solution is as follows:
In a first aspect, being applied to network the embodiment of the invention provides a kind of accidental access method based on resource allocation
Equipment, comprising:
It obtains the quantity of new incoming terminal in current period and retransmits terminal quantity；
According to the quantity of incoming terminal new in the current period and retransmit terminal quantity determine current period PRACH and
The resource allocation and maximum of PUSCH is successfully accessed terminal quantity；
Judge whether the quantity of the new incoming terminal is not more than the maximum and is successfully accessed terminal quantity；
If so, whole new incoming terminals is allowed to carry out current week according to the resource allocation of the PRACH and PUSCH
The default random access of phase；
If it is not, then being connect at random according to the corresponding random number currently obtained of the new incoming terminal and restriction factor
Enter, wherein the restriction factor is the ratio for the quantity that the maximum is successfully accessed terminal quantity and the new incoming terminal, institute
Random number is stated greater than 0 and less than 1.
It is preferably, described that random access is carried out according to the corresponding random number of the new incoming terminal and restriction factor, comprising:
Judge whether the corresponding random number currently obtained of each described new incoming terminal is greater than the restriction factor；
If it is not, then the new incoming terminal is allowed to carry out current period according to the resource allocation of the PRACH and PUSCH
Default random access；
If it is, controlling the default random access that the new incoming terminal enters next period.
Preferably, the resource allocation and maximum of the PRACH and PUSCH is successfully accessed number of terminals method for determination of amount packet
It includes:
Pass through formula N*=argmin1≤N≤Q-1{|E[Vdetect]-(Q-N)/s | and formula The first channel quantity N is calculated*；
Pass through formulaIt calculates
To second channel quantity Nopt；
As the first channel quantity N*Greater than the second channel quantity NoptWhen, N is distributed for PRACH*A resource block is
PUSCH distributes (Q-N*) a resource block, and according to the first channel quantity N*Determine that the maximum is successfully accessed terminal quantity and is
First is successfully accessed terminal quantity V1；
As the first channel quantity N*No more than the second channel quantity NoptWhen, N is distributed for PRACHoptA resource
Block distributes (Q-N for PUSCHopt) a resource block, and according to the second channel quantity NoptDetermine that the maximum is successfully accessed end
End quantity is successfully accessed terminal quantity V for second2；
Wherein, N is the quantity of the resource block of PRACH distribution, E [Vdetect] it is the quantity of leader sequence detected, u
For the quantity of incoming terminal new in the current period and the summation of re-transmission terminal quantity, k is the leading of a resource block carrying
Sequence number, Q are up channel sum, and s is the quantity for forming the resource block of a up channel.
Preferably, described first it is successfully accessed terminal quantity V1Calculation formula are as follows:
Described second is successfully accessed terminal quantity V2Calculation formula are as follows:
Preferably, the default random access includes:
Receive the terminal by the PRACH leader sequence sent and detects the mark of the leader sequence；
Corresponding with mark accidental access response message is sent to the terminal, so that: the terminal is according to acquisition
Timing Advance parameter adjust own signal sending time, and sent out on PUSCH corresponding with the PUSCH resource information of acquisition
Transmitting scheduling information, wherein corresponding with the mark accidental access response message carry the Timing Advance parameter and
The PUSCH resource information；
It receives the scheduling information that the terminal is sent and sends contention resolution message extremely if translating the scheduling information
The terminal, so that: the terminal receives the contention resolution message, and establishes and communicate to connect with the network equipment, completes
The random access of current period；If not translating the scheduling information, the random access failure of current period, entrance is next
The default random access in period.
Second aspect, the embodiment of the invention also provides a kind of accidental access devices based on resource allocation, are applied to net
Network equipment, comprising:
Quantity obtains module, for obtaining the quantity of new incoming terminal in current period and retransmitting terminal quantity；
Resource distribution module, for being determined according to the quantity and re-transmission terminal quantity of incoming terminal new in the current period
The resource allocation and maximum of the PRACH and PUSCH of current period are successfully accessed terminal quantity；
First judgment module is successfully accessed end for judging whether the quantity of the new incoming terminal is not more than the maximum
Hold quantity；
First processing module is successfully accessed terminal quantity no more than the maximum for the quantity when the new incoming terminal
When, allow the default that all the new incoming terminal carries out current period according to the resource allocation of the PRACH and PUSCH random
Access；
Second processing module is greater than the maximum for the quantity when the new incoming terminal and is successfully accessed terminal quantity
When, random access is carried out according to the corresponding random number currently obtained of the new incoming terminal and restriction factor, wherein the limit
The factor processed is the ratio for the quantity that the maximum is successfully accessed terminal quantity and the new incoming terminal, and the random number is greater than 0
And less than 1.
Preferably, the Second processing module includes:
Second judgment unit is greater than the maximum for the quantity when the new incoming terminal and is successfully accessed terminal quantity
When, judge whether the corresponding random number currently obtained of each described new incoming terminal is greater than the restriction factor；
The second processing unit, for being not more than the limitation when the corresponding random number currently obtained of the new incoming terminal
Because of the period of the day from 11 p.m. to 1 a.m, the new incoming terminal is allowed to connect at random according to the default that the resource allocation of the PRACH and PUSCH carries out current period
Enter；
Third processing unit, for when the corresponding random number currently obtained of the new incoming terminal be greater than the limitation because
The period of the day from 11 p.m. to 1 a.m controls the default random access that the new incoming terminal enters next period.
Preferably, the resource distribution module particularly due to:
Pass through formula N*=argmin1≤N≤Q-1{E[Vdetect]-(Q-N)/s } and formula The first channel quantity N is calculated*；
Pass through formulaIt calculates
To second channel quantity Nopt；
As the first channel quantity N*Greater than the second channel quantity NoptWhen, N is distributed for PRACH*A resource block is
PUSCH distributes (Q-N*) a resource block, and according to the first channel quantity N*Determine that the maximum is successfully accessed terminal quantity and is
First is successfully accessed terminal quantity V1；
As the first channel quantity N*No more than the second channel quantity NoptWhen, N is distributed for PRACHoptA resource
Block distributes (Q-N for PUSCHopt) a resource block, and according to the second channel quantity NoptDetermine that the maximum is successfully accessed end
End quantity is successfully accessed terminal quantity V for second2；
Wherein, N is the quantity of the resource block of PRACH distribution, E [Vdetect] it is the quantity of leader sequence detected, u
For the quantity of incoming terminal new in the current period and the summation of re-transmission terminal quantity, k is the leading of a resource block carrying
Sequence number, Q are up channel sum, and s is the quantity for forming the resource block of a up channel.
Preferably, described first it is successfully accessed terminal quantity V1Calculation formula are as follows:
Described second is successfully accessed terminal quantity V2Calculation formula are as follows:
Preferably, the default random access includes:
Receive the terminal by the PRACH leader sequence sent and detects the mark of the leader sequence；
Corresponding with mark accidental access response message is sent to the terminal, so that: the terminal is according to acquisition
Timing Advance parameter adjust own signal sending time, and sent out on PUSCH corresponding with the PUSCH resource information of acquisition
Transmitting scheduling information, wherein corresponding with the mark accidental access response message carry the Timing Advance parameter and
The PUSCH resource information；
It receives the scheduling information that the terminal is sent and sends contention resolution message extremely if translating the scheduling information
The terminal, so that: the terminal receives the contention resolution message, and establishes and communicate to connect with the network equipment, completes
The random access of current period；If not translating the scheduling information, the random access failure of current period, entrance is next
The default random access in period.
In the present solution, obtaining the quantity of new incoming terminal in current period first and retransmitting terminal quantity, then basis is worked as
In the preceding period quantity of new incoming terminal and retransmit terminal quantity determine current period PRACH and PUSCH resource allocation and
Maximum is successfully accessed terminal quantity, then judges whether the quantity of new incoming terminal is not more than maximum and is successfully accessed terminal quantity, such as
Fruit is that whole new incoming terminals is then allowed to connect at random according to the default that the resource allocation of PRACH and PUSCH carries out current period
Enter, if it is not, then carrying out random access according to the corresponding random number currently obtained of new incoming terminal and restriction factor.Network is set
It is standby to be successfully accessed terminal quantity by comparing the quantity and maximum of incoming terminal new in current period, it realizes to new incoming terminal
The control of quantity is successfully accessed rate in current period to improve and retransmit terminal, so that retransmitting terminal quantity with the period
Increase and constantly reduce, new incoming terminal can all allow random access in a short time, and average access delay substantially reduces.
Detailed description of the invention
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 technical 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
It obtains other drawings based on these drawings.
Fig. 1 is a kind of flow diagram of the accidental access method based on resource allocation provided by the embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of the accidental access device based on resource allocation provided by the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Firstly the need of explanation, the heretofore described network equipment includes the equipment that arbitrarily can connect network, example
Such as base station, relay station, are also possible to terminal device.Secondly, heretofore described terminal can be that can arbitrarily connect net
The terminal device of network, such as can be with are as follows: mobile phone, computer, intelligent TV set and various intelligent electric appliances etc..
Explanation is needed further exist for, heretofore described new incoming terminal is the end for initiating random access request for the first time
End, the re-transmission terminal are that random access request is re-initiated in current period in upper period random access failure
Terminal.
Embodiment one
A kind of accidental access method based on resource allocation provided in an embodiment of the present invention is introduced below, such as Fig. 1
Shown, a kind of accidental access method based on resource allocation provided in an embodiment of the present invention is applied to the network equipment, the method
May include:
S101 obtains the quantity of new incoming terminal in current period and retransmits terminal quantity；
It is understood that initiating the institute of random access request in current period in each period of random access
The quantity for having terminal is the quantity of new incoming terminal and the summation of re-transmission terminal quantity in current period, obtains the current period
In new incoming terminal quantity and the re-transmission terminal quantity after, can be obtained and initiate all of random access request in current period
The quantity of terminal.
It should be noted that obtaining in the current period, the quantity of new incoming terminal and the mode of the re-transmission terminal quantity can
It to use existing either type, is not specifically limited herein, for example, can determine present terminal number by loading algorithm for estimating
Amount.
S102 determines current period according to the quantity of incoming terminal new in the current period and re-transmission terminal quantity
The resource allocation and maximum of PRACH and PUSCH is successfully accessed terminal quantity；
Since the sum of up channel is fixed, and the quantity of PRACH and Physical Uplink Shared Channel (PUSCH) is distinguished
The transmission of leader sequence and scheduling information is influenced, so obtaining the quantity of new incoming terminal in the current period and retransmitting number of terminals
After amount, it can determine the distribution of uplink channel resources according to the quantity of the acquisition, i.e. the resource allocation of PRACH and PUSCH, with
Guarantee that the successful terminal quantity of random access reaches maximum.
Preferably, formula N can be passed through*=argmin1≤N≤Q-1{|E[Vdetect]-(Q-N)/s | and formulaThe first channel quantity N is calculated*；
Pass through formulaIt calculates
To second channel quantity Nopt。
Wherein, N is the quantity of the resource block of PRACH distribution, E [Vdetect] it is the quantity of leader sequence detected, u
For the quantity of incoming terminal new in current period and the summation of re-transmission terminal quantity, k is the leader sequence of resource block carrying
Number, Q are up channel sum, and s is the quantity for forming the resource block of a up channel.
It can be seen that first channel quantity N*It indicates: working as PUSCH quantity and detection by what traversal search mode obtained
When the quantity of the leader sequence arrived is identical, for the quantity of the resource block of PRACH distribution.It is understood that before this is detected
Lead the quantity E [V of sequencedetect] with the quantity of incoming terminal new in current period and retransmit the summation u of terminal quantity and be
The quantity N of the resource block of PRACH distribution is related, is arrived due to general u obedience Poisson distribution:
Due to E [Vdetect] be N convex function, (Q-N)/s is the subtraction function of N, therefore, from mathematical principle: as N <
N*When, E [Vdetect] < (Q-N)/s；As N > N*When, E [Vdetect] > (Q-N)/s；Work as N=N*When, E [Vdetect]=(Q-N)/
s。
Specifically, the formula that available calculating is successfully accessed terminal quantity accordingly is as follows as N≤N*:
Since V increases with the increase of N, as N=N*, V maximum is successfully accessed to get to corresponding first
Terminal quantity
As N > N*, the formula that available calculating is successfully accessed terminal quantity accordingly is as follows:
Since V is non-monotonic increasing or decreasing function, it can obtain reaching V most by way of traversal search
It is the resource block number N of PRACH distribution when big, is denoted as Nopt。
At this point, enablingThen formulaBecome function:
Derivation is carried out to function f (x), obtains following formula:
Wherein,
It enablesThen haveBecause the formula is a non-linear side
Journey, so obtaining non trivial solution by traversal search mode:
Due toTherefore, available second channel quantity NoptCalculation formula:
In turn, it has also just obtained second and has been successfully accessed terminal quantity V2Calculation formula:
By being calculated above it can be concluded that optimal uplink channel resources allocation plan, i.e., are as follows:
As first channel quantity N*Greater than second channel quantity NoptWhen, N is distributed for PRACH*A resource block is
PUSCH distributes (Q-N*) a resource block, and according to first channel quantity N*Determining that the maximum is successfully accessed terminal quantity is first
It is successfully accessed terminal quantity V1；
As first channel quantity N*No more than second channel quantity NoptWhen, N is distributed for PRACHoptA resource block is
PUSCH distributes (Q-Nopt) a resource block, and according to second channel quantity NoptDetermine that the maximum is successfully accessed terminal quantity and is
Second is successfully accessed terminal quantity V2。
S103, judges whether the quantity of the new incoming terminal is not more than the maximum and is successfully accessed terminal quantity, if
It is to execute step S104, otherwise, executes step S105；
After being determined that the maximum is successfully accessed terminal quantity, for the random access to the new incoming terminal of this in current period
Quantity limitation is carried out, it, can be by the quantity of the new incoming terminal and the maximum to improve the random access success rate for retransmitting terminal
Terminal quantity is successfully accessed to be compared.
Wherein, it is to pass through above-mentioned first be calculated to be successfully accessed terminal quantity which, which is successfully accessed terminal quantity,
V1Or second be successfully accessed terminal quantity V2。
S104 allows whole new incoming terminals to carry out current period according to the resource allocation of the PRACH and PUSCH
Default random access；
When the quantity for judging the new incoming terminal is successfully accessed terminal quantity no more than the maximum, to guarantee that this is newly arrived
Up to the success rate of the random access of terminal, the quantity of new incoming terminal random access failure in current period is reduced to the greatest extent,
It can permit all new incoming terminals to connect at random according to the default that the resource allocation of above-mentioned PRACH and PUSCH carries out current period
Enter.
S105 carries out random access according to the corresponding random number currently obtained of the new incoming terminal and restriction factor.
When the quantity for judging the new incoming terminal, which is greater than the maximum, is successfully accessed terminal quantity, illustrate in current period
The new incoming terminal quantity it is bigger, it cannot be guaranteed that whole new incoming terminals can successfully carry out random access, if this
When allow all new incoming terminals carry out default random access, will lead to the new incoming terminal random access failure in part into attaching most importance to
Transmission terminal causes adverse effect for the random access in next period, meanwhile, it can also seriously affect the re-transmission terminal in current period
Random access success rate.So can according to the corresponding random number currently obtained of the new incoming terminal and restriction factor come
Further control the progress of random access.
It preferably, can be with are as follows: judge whether the corresponding random number currently obtained of each described new incoming terminal is greater than
Otherwise the restriction factor, executes step S106 if so, executing step S107.
It should be noted that the restriction factor is that the maximum is successfully accessed terminal quantity and the quantity of the new incoming terminal
Ratio, the random number are greater than 0 and less than 1.It is understood that since the maximum is successfully accessed terminal quantity less than the new arrival
The quantity of terminal, so the restriction factor is greater than 0 and less than 1.
Explanation is needed further exist for, the corresponding random number of the new incoming terminal obtains at random, and acquisition modes can be with
Using existing mode, herein without limiting.
S106 allows the new incoming terminal to carry out the default of current period according to the resource allocation of the PRACH and PUSCH
Random access；
When judging the corresponding random number currently obtained of the new incoming terminal no more than the restriction factor, then allow this
New incoming terminal carries out the default random access of current period according to the resource allocation of above-mentioned PRACH and PUSCH.
For example, if the restriction factor in current period is 0.6, then, corresponding random number is less than or equal to 0.6
New incoming terminal can carry out the default random access of current period.In this way, can so that the new incoming terminal of a part into
The default random access of row current period, rather than all carry out.
S107 controls the default random access that the new incoming terminal enters next period.
When judging that the corresponding random number currently obtained of the new incoming terminal is greater than the restriction factor, then it is new to control this
Incoming terminal enters the default random access in next period.
For example, if the restriction factor in current period is 0.6, then, corresponding random number is greater than 0.6 new arrival
Terminal not can be carried out the default random access of current period then, that is to say, that if the corresponding random number of a certain new incoming terminal is
0.8, then its default random access that not can be carried out current period, but enter the default random access in next period.
It should be noted that above-mentioned default random access is traditional random access, connect at random in the prior art
It is identical for entering, and be may comprise steps of:
Receive the terminal by the PRACH leader sequence sent and detects the mark of the leader sequence；
Corresponding with mark accidental access response message is sent to the terminal, so that: the terminal is according to acquisition
Timing Advance parameter adjust own signal sending time, and sent out on PUSCH corresponding with the PUSCH resource information of acquisition
Transmitting scheduling information, wherein corresponding with the mark accidental access response message carry the Timing Advance parameter and
The PUSCH resource information；
It receives the scheduling information that the terminal is sent and sends contention resolution message extremely if translating the scheduling information
The terminal, so that: the terminal receives the contention resolution message, and establishes and communicate to connect with the network equipment, completes
Current period random access；If not translating the scheduling information, the random access failure of current period, into next week
The default random access of phase.
It should be noted that above-mentioned terminal includes above-mentioned new incoming terminal and re-transmission terminal, either quilt in current period
Allow to carry out to default the new incoming terminal of random access and retransmit terminal, or is connect at random by the default that control enters next period
The new incoming terminal entered, as long as carry out default random access terminal be included in.The terminal in the manner described above into
Row default random access.
As it can be seen that obtaining current period first using a kind of accidental access method based on resource allocation provided by the invention
In new incoming terminal quantity and retransmit terminal quantity, then according to the quantity of incoming terminal new in current period and re-transmission terminal
Quantity determines that the resource allocation of the PRACH and PUSCH of current period and maximum are successfully accessed terminal quantity, then judges newly to reach eventually
Whether the quantity at end, which is not more than maximum, is successfully accessed terminal quantity, if it is, allow all new incoming terminals according to PRACH and
The resource allocation of PUSCH carries out the default random access of current period, if it is not, then currently obtaining according to new incoming terminal is corresponding
The random number and restriction factor taken carries out random access.Determine the best side of the resource allocation of the PRACH and PUSCH of current period
Case, and it is successfully accessed terminal quantity by comparing the quantity and maximum of incoming terminal new in current period, it realizes and is reached eventually to new
The control of the quantity at end, thus improve retransmit terminal be successfully accessed rate in current period so that retransmit terminal quantity with
Period increases and constantly reduces, and new incoming terminal can all allow random access in a short time, and average access delay is significantly
It reduces.
Embodiment two
As shown in Fig. 2, being that a kind of structure of the accidental access device based on resource allocation provided in an embodiment of the present invention is shown
It is intended to, which is used to execute above-mentioned method shown in FIG. 1, it is applied to the network equipment, the apparatus may include:
Quantity obtains module 210, for obtaining the quantity of new incoming terminal in current period and retransmitting terminal quantity；
Resource distribution module 220, for the quantity and re-transmission terminal quantity according to incoming terminal new in the current period
The resource allocation and maximum for determining the PRACH and PUSCH of current period are successfully accessed terminal quantity；
First judgment module 230 successfully connects for judging whether the quantity of the new incoming terminal is not more than the maximum
Enter terminal quantity；
First processing module 240 is successfully accessed terminal no more than the maximum for the quantity when the new incoming terminal
When quantity, whole new incoming terminals is allowed to carry out the default of current period according to the resource allocation of the PRACH and PUSCH
Random access；
Second processing module 250 is greater than the maximum for the quantity when the new incoming terminal and is successfully accessed number of terminals
When amount, random access is carried out according to the corresponding random number currently obtained of the new incoming terminal and restriction factor, wherein described
Restriction factor is the ratio for the quantity that the maximum is successfully accessed terminal quantity and the new incoming terminal, and the random number is greater than
0 and less than 1.
Specifically, the Second processing module 250 may include:
Second judgment unit 251 is greater than the maximum for the quantity when the new incoming terminal and is successfully accessed number of terminals
When amount, judge whether the corresponding random number currently obtained of each described new incoming terminal is greater than the restriction factor；
The second processing unit 252, for when the corresponding random number currently obtained of the new incoming terminal is no more than described
When restriction factor, allow the new incoming terminal according to the PRACH and PUSCH resource allocation carry out current period default with
Machine access；
Third processing unit 253, for being greater than the limit when the corresponding random number currently obtained of the new incoming terminal
System controls the default random access that the new incoming terminal enters next period because of the period of the day from 11 p.m. to 1 a.m.
Wherein, the resource distribution module 220, is specifically used for:
Pass through formula N*=argmin1≤N≤Q-1{|E[Vdetect]-(Q-N)/s | and formula The first channel quantity N is calculated*；
Pass through formulaIt calculates
To second channel quantity Nopt；
As the first channel quantity N*Greater than the second channel quantity NoptWhen, N is distributed for PRACH*A resource block is
PUSCH distributes (Q-N*) a resource block, and according to the first channel quantity N*Determine that the maximum is successfully accessed terminal quantity and is
First is successfully accessed terminal quantity V1；
As the first channel quantity N*No more than the second channel quantity NoptWhen, N is distributed for PRACHoptA resource
Block distributes (Q-N for PUSCHopt) a resource block, and according to the second channel quantity NoptDetermine that the maximum is successfully accessed end
End quantity is successfully accessed terminal quantity V for second2；
Wherein, N is the quantity of the resource block of PRACH distribution, E [Vdetect] it is the quantity of leader sequence detected, u
For the quantity of incoming terminal new in the current period and the summation of re-transmission terminal quantity, k is the leading of a resource block carrying
Sequence number, Q are up channel sum, and s is the quantity for forming the resource block of a up channel.
Preferably,
Described first is successfully accessed terminal quantity V1Calculation formula are as follows:
Described second is successfully accessed terminal quantity V2Calculation formula are as follows:
It should be noted that the default random access includes:
Receive the terminal by the PRACH leader sequence sent and detects the mark of the leader sequence；
Corresponding with mark accidental access response message is sent to the terminal, so that: the terminal is according to acquisition
Timing Advance parameter adjust own signal sending time, and sent out on PUSCH corresponding with the PUSCH resource information of acquisition
Transmitting scheduling information, wherein corresponding with the mark accidental access response message carry the Timing Advance parameter and
The PUSCH resource information；
It receives the scheduling information that the terminal is sent and sends contention resolution message extremely if translating the scheduling information
The terminal, so that: the terminal receives the contention resolution message, and establishes and communicate to connect with the network equipment, completes
Current period random access；If not translating the scheduling information, the random access failure of current period, into next week
The default random access of phase.
As it can be seen that obtaining current period first using a kind of accidental access device based on resource allocation provided by the invention
In new incoming terminal quantity and retransmit terminal quantity, then according to the quantity of incoming terminal new in current period and re-transmission terminal
Quantity determines that the resource allocation of the PRACH and PUSCH of current period and maximum are successfully accessed terminal quantity, then judges newly to reach eventually
Whether the quantity at end, which is not more than maximum, is successfully accessed terminal quantity, if it is, allow all new incoming terminals according to PRACH and
The resource allocation of PUSCH carries out the default random access of current period, if it is not, then currently obtaining according to new incoming terminal is corresponding
The random number and restriction factor taken carries out random access.Determine the best side of the resource allocation of the PRACH and PUSCH of current period
Case, and it is successfully accessed terminal quantity by comparing the quantity and maximum of incoming terminal new in current period, it realizes and is reached eventually to new
The control of the quantity at end, thus improve retransmit terminal be successfully accessed rate in current period so that retransmit terminal quantity with
Period increases and constantly reduces, and new incoming terminal can all allow random access in a short time, and average access delay is significantly
It reduces.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Each embodiment in this specification is all made of relevant mode and describes, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device reality
For applying example, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to embodiment of the method
Part explanation.
Those of ordinary skill in the art will appreciate that all or part of the steps in realization above method embodiment is can
It is completed with instructing relevant hardware by program, the program can store in computer-readable storage medium,
The storage medium designated herein obtained, such as: ROM/RAM, magnetic disk, CD.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (6)
1. a kind of accidental access method based on resource allocation is applied to the network equipment characterized by comprising
It obtains the quantity of new incoming terminal in current period and retransmits terminal quantity；
According to the quantity of incoming terminal new in the current period and retransmit terminal quantity determine current period PRACH and
The resource allocation and maximum of PUSCH is successfully accessed terminal quantity；
Judge whether the quantity of the new incoming terminal is not more than the maximum and is successfully accessed terminal quantity；
If so, whole new incoming terminals is allowed to carry out current period according to the resource allocation of the PRACH and PUSCH
Default random access；
If it is not, then judging whether the corresponding random number currently obtained of each described new incoming terminal is greater than restriction factor；
If the corresponding random number currently obtained of each described new incoming terminal is not more than the restriction factor, allow this
New incoming terminal carries out the default random access of current period according to the resource allocation of the PRACH and PUSCH；
If the corresponding random number currently obtained of each described new incoming terminal is greater than the restriction factor, it is new to control this
Incoming terminal enters the default random access in next period；
Wherein, the restriction factor is the ratio for the quantity that the maximum is successfully accessed terminal quantity and the new incoming terminal,
The random number is greater than 0 and less than 1；
The resource allocation and maximum of the PRACH and PUSCH is successfully accessed number of terminals method for determination of amount
Pass through formula N*=argmin1≤N≤Q-1{|E[Vdetect]-(Q-N)/s | and formula The first channel quantity N is calculated*；
Pass through formulaIt is calculated
Two channel quantity Nopt；
As the first channel quantity N*Greater than the second channel quantity NoptWhen, N is distributed for PRACH*A resource block is
PUSCH distributes (Q-N*) a resource block, and according to the first channel quantity N*Determine that the maximum is successfully accessed terminal quantity and is
First is successfully accessed terminal quantity V1；
As the first channel quantity N*No more than the second channel quantity NoptWhen, N is distributed for PRACHoptA resource block is
PUSCH distributes (Q-Nopt) a resource block, and according to the second channel quantity NoptDetermine that the maximum is successfully accessed number of terminals
Amount is successfully accessed terminal quantity V for second2；
Wherein, N is the quantity of the resource block of PRACH distribution, E [Vdetect] it is the quantity of leader sequence detected, u is institute
Stating the quantity of new incoming terminal and the summation of re-transmission terminal quantity, k in current period is the leader sequence of resource block carrying
Number, Q are up channel sum, and s is the quantity for forming the resource block of a up channel.
2. the method as described in claim 1, which is characterized in that
Described first is successfully accessed terminal quantity V1Calculation formula are as follows:
Described second is successfully accessed terminal quantity V2Calculation formula are as follows:
3. the method as described in claim 1, which is characterized in that the default random access includes:
Receive the terminal by the PRACH leader sequence sent and detects the mark of the leader sequence；
Corresponding with mark accidental access response message is sent to the terminal so that: the terminal according to acquisition when
Between advance parameters adjust own signal sending time, and on PUSCH corresponding with the PUSCH resource information of acquisition send adjust
Spend information, wherein corresponding with the mark accidental access response message carrying Timing Advance parameter and described
PUSCH resource information；
The scheduling information that the terminal is sent is received, if translating the scheduling information, sends contention resolution message to described
Terminal, so that: the terminal receives the contention resolution message, and establishes and communicate to connect with the network equipment, completes current
The random access in period；If not translating the scheduling information, the random access failure of current period, into next period
Default random access.
4. a kind of accidental access device based on resource allocation is applied to the network equipment characterized by comprising
Quantity obtains module, for obtaining the quantity of new incoming terminal in current period and retransmitting terminal quantity；
Resource distribution module determines current for the quantity and re-transmission terminal quantity according to incoming terminal new in the current period
The resource allocation and maximum of the PRACH and PUSCH in period are successfully accessed terminal quantity；
First judgment module is successfully accessed number of terminals for judging whether the quantity of the new incoming terminal is not more than the maximum
Amount；
First processing module, for when the quantity of the new incoming terminal no more than the maximum be successfully accessed terminal quantity when,
Whole new incoming terminals are allowed to connect at random according to the default that the resource allocation of the PRACH and PUSCH carries out current period
Enter；
Second processing module, for sentencing when the quantity of the new incoming terminal is greater than the maximum and is successfully accessed terminal quantity
Whether the corresponding random number currently obtained of each described new incoming terminal of breaking is greater than restriction factor；If each is described new
The corresponding random number currently obtained of incoming terminal is not more than the restriction factor, then allows the new incoming terminal according to described
The resource allocation of PRACH and PUSCH carries out the default random access of current period；If each described new incoming terminal is corresponding
The random number currently obtained be greater than the restriction factor, then control the new incoming terminal and connect at random into the default in next period
Enter；
Wherein, the restriction factor is the ratio for the quantity that the maximum is successfully accessed terminal quantity and the new incoming terminal,
The random number is greater than 0 and less than 1；
The resource distribution module particularly due to:
Pass through formula N*=argmin1≤N≤Q-1{E[Vdetect]-(Q-N)/s } and formula The first channel quantity N is calculated*；
Pass through formulaIt is calculated
Two channel quantity Nopt；
As the first channel quantity N*Greater than the second channel quantity NoptWhen, N is distributed for PRACH*A resource block is
PUSCH distributes (Q-N*) a resource block, and according to the first channel quantity N*Determine that the maximum is successfully accessed terminal quantity and is
First is successfully accessed terminal quantity V1；
As the first channel quantity N*No more than the second channel quantity NoptWhen, N is distributed for PRACHoptA resource block is
PUSCH distributes (Q-Nopt) a resource block, and according to the second channel quantity NoptDetermine that the maximum is successfully accessed number of terminals
Amount is successfully accessed terminal quantity V for second2；
Wherein, N is the quantity of the resource block of PRACH distribution, E [Vdetect| for the quantity of the leader sequence detected, u is institute
Stating the quantity of new incoming terminal and the summation of re-transmission terminal quantity, k in current period is the leader sequence of resource block carrying
Number, Q are up channel sum, and s is the quantity for forming the resource block of a up channel.
5. device as claimed in claim 4, which is characterized in that
Described first is successfully accessed terminal quantity V1Calculation formula are as follows:
Described second is successfully accessed terminal quantity V2Calculation formula are as follows:
6. device as claimed in claim 4, which is characterized in that the default random access includes:
Receive the terminal by the PRACH leader sequence sent and detects the mark of the leader sequence；
Corresponding with mark accidental access response message is sent to the terminal so that: the terminal according to acquisition when
Between advance parameters adjust own signal sending time, and on PUSCH corresponding with the PUSCH resource information of acquisition send adjust
Spend information, wherein corresponding with the mark accidental access response message carrying Timing Advance parameter and described
PUSCH resource information；
The scheduling information that the terminal is sent is received, if translating the scheduling information, sends contention resolution message to described
Terminal, so that: the terminal receives the contention resolution message, and establishes and communicate to connect with the network equipment, completes current
The random access in period；If not translating the scheduling information, the random access failure of current period, into next period
Default random access.
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| CN114786256A (en) * | 2019-03-13 | 2022-07-22 | 中兴通讯股份有限公司 | Data transmission method, user equipment, base station and storage medium |
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