CN101848539B - Method and equipment for determining member carrier initiating random access and initiating time - Google Patents
Method and equipment for determining member carrier initiating random access and initiating time Download PDFInfo
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- CN101848539B CN101848539B CN 200910080685 CN200910080685A CN101848539B CN 101848539 B CN101848539 B CN 101848539B CN 200910080685 CN200910080685 CN 200910080685 CN 200910080685 A CN200910080685 A CN 200910080685A CN 101848539 B CN101848539 B CN 101848539B
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Abstract
The invention discloses a method and equipment for determining member carrier initiating random access and initiating time. The method comprises: an evolution base station determines a retroversion instruction aiming at each uplink member carrier of user equipment; the evolution base station carries the retroversion instruction aiming at each uplink member carrier of the user equipment in a random access response message; and the user equipment determines the uplink member carrier and the initiating time for initiating next random access according to the retroversion instruction of each uplink member carrier in the random access response message. The invention can overcome the defect that the prior art only can realize congestion control on single member carrier; the invention can better solve the problem of random access congestion control between the carriers of a multiple-member carrier system and improves the random access success rate of the whole system.
Description
Technical field
The present invention relates to wireless communication technology, particularly the member carrier of the random access of a kind of definite initiation and the method and apparatus of the time of initiation.
Background technology
1, carrier aggregation mechanism brief introduction:
The peak rate of LTE-A (Long Term Evolution-Advanced, the long evolving system of enhancing) has huge raising than LTE (Long Term Evolution, Long Term Evolution), requires to reach descending 1Gbps, up 500Mbps.Simultaneously, LTE-A system requirements and LTE system are compatible well, the LTE maximum bandwidth 20MHz of system.Based on improve peak rate, with the LTE system compatible with take full advantage of the needs of frequency resource, the LTE-A system has introduced CA (Carrier Aggregation, carrier aggregation) technology.
Carrier aggregation technology refers to that up-downgoing respectively comprises a plurality of member carriers in a residential quarter, rather than only has the pattern of a cover carrier wave before in LTE and wireless communication system.ENB (evolution base station) is to the unified management of the member carrier of the many covers in the residential quarter and scheduling, and the conversion of different members intercarrier is resource allocation problem in a residential quarter.Member carrier can be continuous or discrete, and for compatible with LTE, the maximum bandwidth of each member carrier is 20MHz, and the bandwidth between each member carrier can be identical or different.
2, random access procedure brief introduction.
Random access technology is the critical function of modern cell mobile communication systems, under a lot of scenes, must access at first at random, could continue follow-up operation.Take the LTE system as example, the scene that need to carry out random access generally comprises following five kinds:
1, the UE (User Equipment, subscriber equipment) that is in RRC_Idle (standby) state enters RRC-Connected (connection) state;
2, UE is after Radio Link Failure, and recovery is connected with eNB's;
3, UE has upstream data to arrive, but eNB does not distribute new ascending resource, and also there is no special-purpose dispatch request resource;
4, eNB has downlink data to arrive, but can't directly dispatch UE, such as UE is in the uplink loss state at present;
5, handoff procedure.
Random access procedure in LTE is divided into two kinds at present:
1, competition access at random;
2, non-competing random access.
Fig. 1 is competition random access procedure implementing procedure schematic diagram, and in figure, Msg is message (Message), as shown in the figure, comprises the following steps:
In the random access of competition, UE selects preamble (random access leader sequence) at random, and at PRACH (the Physical Random Access Channel according to certain rules selection, Physical Random Access Channel) the upper preamble that selectes that sends, due to randomness, the preamble that different UEs is selected may be identical, causes thus the competition between UE.In the situation that competition occurs, only have at most a UE finally to access successfully.Competing failed UE can only postpone a period of time and again initiate to compete random access.Above-mentioned 5 kinds of scenes all can be used the random access of competition.
Fig. 2 is non-competing random access procedure implementing procedure schematic diagram, as shown in the figure, comprises the following steps:
Also introduced non-competing random access in LTE, eNB reserves a part of preamble in non-competing random access, is called dedicated preamble, and the UE of the random access of competition can not select these preamble.In the process of non-competing random access, eNB is that UE selects a dedicated preamble, after UE obtains this dedicated preamble, sends this dedicated preamble on according to the PRACH resource of certain rules selection.ENB can control this special-purpose Preamble and only be used by this UE, thereby has avoided the generation of conflict, has improved the access probability of success immediately of UE, and has effectively reduced access delay.Non-competing random access is applied to rear two kinds of random access scenes, and namely downlink data arrives and handoff procedure.
3, access at random the jamming control method brief introduction.
Random access procedure has competition to solve failed possibility naturally, competition is solved failed user, if what adopt is non-competing random access, after determining that competition solves unsuccessfully, can use at once the private resource of network side appointment again to initiate random access, if what adopt is the random access of competition, need to take suitable jamming control method.
The effect of random access jamming control method is to avoid the user of the random access of initiation in the short time too much, to improve random access success rate.The LTE system adopts back off (rollback) mechanism to access at random congestion control:
1, eNB carries BI (Backoff Indicator, rollback indication) in accidental access response message (Msg2);
2, UE receives and stores BI information, if competition solves unsuccessfully, again initiates random access according to the BI indication.If BI=0, UE initiate random access at once again after competition solves unsuccessfully; If BI＞0 (the backoff parameter that in LTE, BI is corresponding is with the ms counting, and maximum is 960ms), UE select one constantly to initiate next time access at random according to even distribution is random between 0～backoff parameter value.
The deficiencies in the prior art are: an important feature of LTE-A system is that UE can work on a plurality of member carriers, if the backoff mechanism of LTE is directly applied to the LTE-A system, can only realize the congestion control on single member carrier, even it is very idle that this part member carrier will occur, after also still need waiting for the long period, UE could again initiate the situation of random access.
Summary of the invention
The invention provides member carrier and the method and apparatus of the time of initiation of the random access of a kind of definite initiation, in order to solve the congested control problem of random access in many member carriers situation.
The embodiment of the present invention provides member carrier and the method for the time of initiation of the random access of a kind of definite initiation, comprises the steps:
ENB determines the BI for each uplink member carrier of UE;
ENB carries the BI for each uplink member carrier of UE in accidental access response message;
UE determines to initiate uplink member carrier and the initiation time of random access according to the BI of each uplink member carrier in described accidental access response message next time.
Preferably, eNB comprises when the BI that determines for each uplink member carrier of UE:
Access at random density and/or the definite BI for each uplink member carrier of UE of probability of failure according to each uplink member carrier.
Preferably, access at random according to each uplink member carrier density determines whether to carry this uplink member carrier in uplink member carrier BI;
Access at random density and probability of failure according to each uplink member carrier and determine for the rollback parameter in each uplink member carrier of UE BI, described rollback parameter is used for determining to initiate the time of random access next time.
Preferably, described UE is according to the BI of each uplink member carrier in described accidental access response message, determine to initiate uplink member carrier and the initiation time of random access next time, be according to the rollback parameter in the BI that whether carries BI for this uplink member carrier, carries for this uplink member carrier, determine to initiate uplink member carrier and the initiation time of random access next time for one of the path loss of the corresponding downlink member carrier of this uplink member carrier and rollback parameter or its combination.
Preferably, described UE determines to initiate uplink member carrier and the initiation time of random access according to the BI of each uplink member carrier in described accidental access response message next time, determines according to one of following mode or its combination:
Do not carry the BI for the uplink member carrier of the random access of current initiation in accidental access response message, determine initiating immediately random access after random access failure on the uplink member carrier of the random access of current initiation;
Carrying for the rollback parameter in the BI of the random uplink member carrier that accesses of current initiation in accidental access response message is 0, determines initiating immediately random the access after random access failure on the uplink member carrier of the random access of current initiation;
The rollback parameter that carries in accidental access response message in the BI of a plurality of uplink member carrier is 0, determines initiating random access immediately on described rollback parameter is the corresponding uplink member carrier of downlink member carrier of path loss minimum in 0 uplink member carrier after random access failure;
The rollback parameter that carries in accidental access response message in the BI of a plurality of uplink member carrier is 0, and be not 0 for the rollback parameter in the BI of the uplink member carrier of the random access of current initiation, after random access failure the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of the uplink member carrier of the random access of current initiation and the path loss of corresponding downlink member carrier determine to initiate the uplink member carrier that accesses at random;
The rollback parameter that carries in accidental access response message in the BI of a plurality of uplink member carrier is not 0, after random access failure the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier of random access.
Preferably, the path loss of the described downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of the uplink member carrier of the random access of current initiation and the path loss of corresponding downlink member carrier determine to initiate the uplink member carrier that accesses at random, be specially:
X=α
1* (PL
f0-PL
f1)+β
1* backoff
f0, wherein, f1 is the uplink member carrier of path loss minimum in its corresponding downlink member carrier in each uplink member carrier, PL
f1Path loss for its corresponding downlink member carrier;
F0 is the uplink member carrier of the random access of current initiation, PL
f0Be its corresponding downlink member carrier path loss, backoff
f0Be its rollback parameter value;
If X＞Th determines to initiate random access next time on uplink member carrier f1;
If X＜Th determines to initiate random access next time on the uplink member carrier f0 of the random access of current initiation, time delay is at 0～backoff
f0Between select at random according to even distribution;
Th is for selecting thresholding, and α 1 and β 1 are default parameter, and Th, α 1, β 1 are so that after the member carrier selection, the access success rate is up to according to being determined by system emulation.
Preferably, the path loss of the described downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier of random access, be specially:
X
i=α
2* PL
fi+ β
2* backoff
fi, wherein, fi is each uplink member carrier, PL
f1Be the path loss of its corresponding downlink member carrier, backoff
fiBe its rollback parameter value;
Determine to select X
iMinimum member carrier is initiated next time access at random;
α 1 and β 1 are default parameter, and α 1, β 1 are so that member carrier selects rear access success rate to be up to according to being determined by system emulation.
A kind of evolution base station also is provided in the embodiment of the present invention, has comprised:
The BI determination module is used for definite BI for each uplink member carrier of UE;
BI adds module, for the BI that carries at accidental access response message for each uplink member carrier of UE;
Sending module is used for sending the accidental access response message that has carried for each uplink member carrier of UE BI.
Preferably, described BI determination module is further used for accessing at random density and/or the definite BI for each uplink member carrier of UE of probability of failure according to each uplink member carrier.
Preferably, described BI determination module is further used for accessing at random according to each uplink member carrier density determines whether to carry this uplink member carrier in uplink member carrier BI; Access at random density and probability of failure according to each uplink member carrier and determine for the rollback parameter in each uplink member carrier of UE BI, described rollback parameter is used for determining to initiate the time of random access next time.
A kind of subscriber equipment is provided again in the embodiment of the present invention, has comprised:
Receiver module is used for receiving the accidental access response message that has carried for each uplink member carrier of UE BI;
The BI analysis module is used for the BI according to described each uplink member carrier of accidental access response message, determines to initiate uplink member carrier and the initiation time of random access next time.
Preferably, described BI analysis module is further used for according to the rollback parameter in the BI that whether carries BI for this uplink member carrier, carries for this uplink member carrier, determines to initiate uplink member carrier and the initiation time of random access next time for one of the path loss of the corresponding downlink member carrier of this uplink member carrier and rollback parameter or its combination.
Preferably, described BI analysis module comprises:
The first determining unit, be used for when accidental access response message does not carry the BI of the uplink member carrier that accesses at random for current initiation, determine initiating to access at random immediately on the random uplink member carrier that accesses of current initiation after random access failure;
The second determining unit, being used for carrying for the rollback parameter in the BI of the random uplink member carrier that accesses of current initiation at accidental access response message is 0 o'clock, determines initiating immediately random the access after random access failure on the uplink member carrier of the random access of current initiation;
The 3rd determining unit, the rollback parameter that is used for carrying in the BI of a plurality of uplink member carrier at accidental access response message is 0 o'clock, determines initiating random access immediately on described rollback parameter is the corresponding uplink member carrier of downlink member carrier of path loss minimum in 0 uplink member carrier after random access failure;
The 4th determining unit, be 0 for the rollback parameter in the BI that carries a plurality of uplink member carrier at accidental access response message, and be not 0 o'clock for the rollback parameter in the BI of the uplink member carrier of the random access of current initiation, after random access failure the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of the uplink member carrier of the random access of current initiation and the path loss of corresponding downlink member carrier determine to initiate the uplink member carrier that accesses at random;
The 5th determining unit, the rollback parameter that is used for carrying in the BI of a plurality of uplink member carrier at accidental access response message is not 0 o'clock, after random access failure the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier of random access.
Preferably, described the 4th determining unit be further used for the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of the uplink member carrier of the random access of current initiation and the path loss of corresponding downlink member carrier determine to initiate to access at random uplink member carrier the time, be specially:
X=α
1* (PL
f0-PL
f1)+β
1* backoff
f0, wherein, f1 is the uplink member carrier of path loss minimum in its corresponding downlink member carrier in each uplink member carrier, PL
f1Path loss for its corresponding downlink member carrier;
F0 is the uplink member carrier of the random access of current initiation, PL
f0Be its corresponding downlink member carrier path loss, backoff
f0Be its rollback parameter value;
If X＞Th determines to initiate random access next time on uplink member carrier f1;
If X＜Th determines to initiate random access next time on the uplink member carrier f0 of the random access of current initiation, time delay is at 0～backoff
f0Between select at random according to even distribution;
Th is for selecting thresholding, and α 1 and β 1 are default parameter, and Th, α 1, β 1 are so that after the member carrier selection, the access success rate is up to according to being determined by system emulation.
Preferably, described the 5th determining unit is further used for being specially at the path loss of the downlink member carrier corresponding according to each uplink member carrier, when reaching the random uplink member carrier that accesses of the definite initiation of rollback parameter of each uplink member carrier:
X
i=α
2* PL
fi+ β
2* backoff
fi, wherein, fi is each uplink member carrier, PL
f1Be the path loss of its corresponding downlink member carrier, backoff
fiBe its rollback parameter value;
Determine to select X
iMinimum member carrier is initiated next time access at random;
α 1 and β 1 are default parameter, and α 1, β 1 are so that member carrier selects rear access success rate to be up to according to being determined by system emulation.
Member carrier and the system of the time of initiation of the random access of a kind of definite initiation are provided in the embodiment of the present invention, have comprised:
ENB be used for to determine the BI for each uplink member carrier of UE, and carry BI for each uplink member carrier of UE in accidental access response message after, is sent to UE;
UE is used for the BI according to described each uplink member carrier of accidental access response message, determines to initiate uplink member carrier and the initiation time of random access next time.
Beneficial effect of the present invention is as follows:
In the invention process, at first eNB determines the BI for each uplink member carrier of UE, and carry BI for each uplink member carrier of UE in accidental access response message, make UE according to the BI of each uplink member carrier in accidental access response message, to determine to initiate uplink member carrier and the initiation time of random access next time.pass through such scheme, BI due to each member carrier that has carried UE in accidental access response message, make UE can determine to initiate for the situation of each member carrier the member carrier of random access, and can determine to initiate the member carrier of random access and after the initiation time at UE, just can realize control congested under many member carriers, therefore overcome the deficiency that prior art can only realize the congestion control on single member carrier, the intercarrier that can better solve many member carriers systems accesses the congestion control problem at random, improved the random access success rate of whole system.
Description of drawings
Fig. 1 is competition random access procedure implementing procedure schematic diagram in background technology;
Fig. 2 is non-competing random access procedure implementing procedure schematic diagram in background technology;
Fig. 3 is member carrier and the method implementing procedure schematic diagram of the time of initiation of determining to initiate random access in the embodiment of the present invention;
Fig. 4 is member carrier and the system configuration schematic diagram of the time of initiation of determining to initiate random access in the embodiment of the present invention;
Fig. 5 is evolution base station structural representation in the embodiment of the present invention;
Fig. 6 is user device architecture schematic diagram in the embodiment of the present invention;
Fig. 7 is the random access member carrier selection course implementing procedure schematic diagram of eNB indication in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
Fig. 3 as shown in the figure, can comprise the steps: when carrying out congestion control for determining to initiate member carrier and the method implementing procedure schematic diagram of the time of initiation of random access
There is above-mentioned steps to find out, step 301, the 302nd, the processing that the eNB side is carried out, and step 303 is the processing of UE side, the below describes in two sub-sections.
One, eNB side.
In the invention process, eNB carries preferred member's carrier information in accidental access response message (Msg2), if after being used to indicate the UE random access failure, again initiates the preferred member carrier of random access.
Whether eNB by carrying BI to each member carrier, and determine by the value of controlling Backoff in BI which is preferred member carrier, and concrete, evolution base station judges that preferred member carrier can be:
1), the base station judges that each member carrier accesses density at random;
Random access density refers to the random access number of initiation in the unit interval, obviously, preferentially selects the little uplink member carrier of density to initiate random access.
2), carry out necessary backoff calculation of parameter.
Carrying out parameter when determining, because different company's computational methods are all different, the primitive rule of therefore determining in force the backoff parameter is to need to postpone to initiate the random time of accessing after accessing at random density and this random access failure of probability of failure calculating UE according to each uplink member carrier.
That is, eNB comprises when the BI that determines for each uplink member carrier of UE: access at random density and/or probability of failure according to each uplink member carrier and determine BI for each uplink member carrier of UE.
In enforcement, can access at random density determines whether to carry this uplink member carrier in uplink member carrier BI according to each uplink member carrier;
Further can also access at random density and probability of failure according to each uplink member carrier and determine for the rollback parameter in each uplink member carrier of UE BI, described rollback parameter is used for determining to initiate the time of random access next time.
Mode thus, take whether as the uplink member carrier of the random access of current initiation, for this uplink member carrier whether carry BI, rollback parameter in the BI that carries for this uplink member carrier is as difference, can determine that one of following several forms can appear in the congestion control parameter that carries in Msg2, wherein, congestion control parameter has comprised: whether contain BI, and the value of backoff parameter in BI:
The first, do not carry any congestion control parameter information, this situation represents that UE can initiate random access immediately in current uplink member carrier;
The second, to indicate one or several backoff parameter be 0 member carrier (namely can initiate immediately the member carrier of random access);
The third, to indicate one or several backoff parameter be the backoff parameter of the member carrier of 0 member carrier and the random access of the current initiation of UE;
The 4th kind, indicate one or several member carrier and corresponding backoff parameter thereof, wherein can comprise the member carrier of the random access of current initiation.
Two, UE side.
Owing to above-mentioned four kinds of situations only may occurring according to congestion control parameter in Msg2, namely, be whether the uplink member carrier of the random access of current initiation, for four kinds of situations that whether this uplink member carrier carries BI, rollback parameter region in the BI that carries for this uplink member carrier is told, UE can determine to initiate uplink member carrier and initiation time of accessing at random in conjunction with the path loss of the corresponding downlink member carrier of each uplink member carrier next time.
In enforcement, UE according to accidental access response message in the BI of each uplink member carrier, when determining to initiate next time the uplink member carrier of random access and the time of initiation, just can determine to initiate next time according to the rollback parameter in the BI that whether carries BI for this uplink member carrier, carries for this uplink member carrier, for one of the path loss of the corresponding downlink member carrier of this uplink member carrier and rollback parameter or its combination uplink member carrier and the initiation time accessed at random.Therefore respectively the processing of these four kinds of situations is described from the UE side.
1, do not carry the BI of the uplink member carrier that accesses at random for current initiation in accidental access response message, determine initiating to access at random immediately on the random uplink member carrier that accesses of current initiation after random access failure;
Carrying for the rollback parameter in the BI of the random uplink member carrier that accesses of current initiation in accidental access response message is 0, determines initiating immediately random the access after random access failure on the uplink member carrier of the random access of current initiation.
Comprise the current initiation situation of the uplink member carrier of access at random for the first form of Msg2 congestion control parameter and the preferred member carrier of the second form, UE initiates random access immediately at current member carrier after random access failure.
2, the rollback parameter that carries in accidental access response message in the BI of a plurality of uplink member carrier is 0, determines initiating random access immediately on the rollback parameter is the corresponding uplink member carrier of downlink member carrier of path loss minimum in 0 uplink member carrier after random access failure.
For Msg2 congestion control parameter the second form, UE selects the downlink member carrier of path loss minimum according to the path loss of each downlink member carrier corresponding to the uplink member carrier of Msg2 indicating, again initiates random access on the uplink member carrier corresponding with it.
3, the rollback parameter that carries in accidental access response message in the BI of a plurality of uplink member carrier is 0, and be not 0 for the rollback parameter in the BI of the uplink member carrier of the random access of current initiation, after random access failure the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of the uplink member carrier of the random access of current initiation and the path loss of corresponding downlink member carrier determine to initiate the uplink member carrier that accesses at random.
In enforcement, X=α
1* (PL
f0-PL
f1)+β
1* backoff
f0, wherein, f1 is the uplink member carrier of path loss minimum in its corresponding downlink member carrier in each uplink member carrier, PL
f1Path loss for its corresponding downlink member carrier;
F0 is the uplink member carrier of the random access of current initiation, PL
f0Be its corresponding downlink member carrier path loss, backoff
f0Be its rollback parameter value;
If X＞Th determines to initiate random access next time on uplink member carrier f1;
If X＜Th determines to initiate random access next time on the uplink member carrier f0 of the random access of current initiation, time delay is at 0～backoff
f0Between select at random according to even distribution;
Th is for selecting thresholding, and α 1 and β 1 are default parameter, and Th, α 1, β 1 are so that after the member carrier selection, the access success rate is up to according to being determined by system emulation.
This kind situation is for the third form of Msg2 congestion control parameter, UE considers downlink member carrier path loss corresponding to preferred member carrier, downlink member carrier path loss corresponding to current random access uplink member carrier, the backoff parameter of current member carrier determines again to initiate random member carrier and the time delay that accesses.
During concrete enforcement, can be as follows:
At first select the preferred member carrier f1 of its corresponding downlink member carrier path loss minimum, its corresponding path loss is designated as PL
f1
Secondly, determine that the downlink member carrier path loss corresponding with current random access uplink member carrier is designated as PL
f0
At last, calculate X=α
1* (PL
f0-PL
f1)+β
1* backoff
f0If X＞Th initiates random access next time on preferred member carrier f1; If X＜Th initiates random access next time on current member carrier, time delay is at 0～backoff
f0Between select at random according to even distribution.Th is pre-set selection thresholding, α
1And β
1Be the parameter of determining, stipulate or notified by system message by agreement.
Th is pre-set selection thresholding, and normally an empirical value, can finally determine by methods such as emulation, and this is the technology of knowing of this area.α
1And β
1The foundation of selecting is all that after making member carrier select, the access success rate is the highest, can be determined by system emulation.The broadcast that system message just refers to.Above parameter can fix in agreement or be notified by broadcasting (system message).
4, the rollback parameter that carries in accidental access response message in the BI of a plurality of uplink member carrier is not 0, after random access failure the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier of random access.
In enforcement, X
i=α
2* PL
fi+ β
2* backoff
fi, wherein, fi is each uplink member carrier, PL
f1Be the path loss of its corresponding downlink member carrier, backoff
fiBe its rollback parameter value;
Determine to select X
iMinimum member carrier is initiated next time access at random;
α 1 and β 1 are default parameter, and α 1, β 1 are so that member carrier selects rear access success rate to be up to according to being determined by system emulation.
This is for the 4th kind of form of Msg2 congestion control parameter, to each preferred member carrier, and the path loss PL of the downlink member carrier corresponding according to it
fiBackoff parameter b ackoff with indication
fi, calculate X
i=α
2* PL
fi+ β
2* backoff
fi, then select X
iMinimum member carrier is initiated next time access at random, and time delay is at 0～backoff
fiBetween select at random according to even distribution.α
2And β
2Be the parameter of determining, by the agreement regulation or by the system message notice, the foundation of selection is all that after making member carrier select, the access success rate is the highest, can be determined by system emulation.The broadcast that system message just refers to.Above parameter can fix in agreement or be notified by broadcasting (system message).
Based on same inventive concept, member carrier and system, evolution base station, the subscriber equipment of the time of initiation of the random access of a kind of definite initiation also are provided in the embodiment of the present invention, because the principle that these equipment are dealt with problems is similar to member carrier and the method for the time of initiation of the random access of a kind of definite initiation, therefore the enforcement of these equipment can referring to the enforcement of method, repeat part and not give unnecessary details.
Fig. 4 as shown in the figure, can comprise in system for determining to initiate member carrier and the system configuration schematic diagram of the time of initiation of random access:
ENB401 be used for to determine the BI for each uplink member carrier of UE, and carry BI for each uplink member carrier of UE in accidental access response message after, is sent to UE;
UE402 is used for the BI according to described each uplink member carrier of accidental access response message, determines to initiate uplink member carrier and the initiation time of random access next time.
The below describes as an example of eNB and UE example respectively again.
Fig. 5 is the evolution base station structural representation, as shown in the figure, can comprise in eNB:
BI adds module 502, for the BI that carries at accidental access response message for each uplink member carrier of UE;
Sending module 503 is used for sending the accidental access response message that has carried for each uplink member carrier of UE BI.
In enforcement, the BI determination module can be further used for accessing at random density and/or the definite BI for each uplink member carrier of UE of probability of failure according to each uplink member carrier.
The BI determination module can also be further used for accessing at random according to each uplink member carrier density determines whether to carry this uplink member carrier in uplink member carrier BI; Access at random density and probability of failure according to each uplink member carrier and determine for the rollback parameter in each uplink member carrier of UE BI, described rollback parameter is used for determining to initiate the time of random access next time.
Fig. 6 is the user device architecture schematic diagram, comprising:
In enforcement, the BI analysis module can be further used for according to the rollback parameter in the BI that whether carries BI for this uplink member carrier, carries for this uplink member carrier, determine to initiate uplink member carrier and the initiation time of random access next time for one of the path loss of the corresponding downlink member carrier of this uplink member carrier and rollback parameter or its combination.
Can comprise in the BI analysis module:
The first determining unit, be used for when accidental access response message does not carry the BI of the uplink member carrier that accesses at random for current initiation, determine initiating to access at random immediately on the random uplink member carrier that accesses of current initiation after random access failure; The uplink member carrier of random access is initiated in order to determine congestion control parameter in this unit under the first form.
The second determining unit, being used for carrying for the rollback parameter in the BI of the random uplink member carrier that accesses of current initiation at accidental access response message is 0 o'clock, determines initiating immediately random the access after random access failure on the uplink member carrier of the random access of current initiation; The uplink member carrier of random access is initiated in order to determine congestion control parameter in this unit under the second form.
The 3rd determining unit, the rollback parameter that is used for carrying in the BI of a plurality of uplink member carrier at accidental access response message is 0 o'clock, determines initiating random access immediately on described rollback parameter is the corresponding uplink member carrier of downlink member carrier of path loss minimum in 0 uplink member carrier after random access failure; The uplink member carrier of random access is initiated in order to determine congestion control parameter in this unit under the second form.
The 4th determining unit, be 0 for the rollback parameter in the BI that carries a plurality of uplink member carrier at accidental access response message, and be not 0 o'clock for the rollback parameter in the BI of the uplink member carrier of the random access of current initiation, after random access failure the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of the uplink member carrier of the random access of current initiation and the path loss of corresponding downlink member carrier determine to initiate the uplink member carrier that accesses at random; The uplink member carrier of random access is initiated in order to determine congestion control parameter in this unit under the third form.
The 5th determining unit, it is not 0 o'clock for the rollback parameter in the BI that carries a plurality of uplink member carrier at accidental access response message, after random access failure the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier of random access, the uplink member carrier that accesses is at random initiated in order to determine congestion control parameter in this unit under the 4th kind of form.
In enforcement, the 4th determining unit can also be further used for the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of the uplink member carrier of the random access of current initiation and the path loss of corresponding downlink member carrier determine to initiate to access at random uplink member carrier the time, be specially:
X=α
1* (PL
f0-PL
f1)+β
1* backoff
f0, wherein, f1 is the uplink member carrier of path loss minimum in its corresponding downlink member carrier in each uplink member carrier, PL
f1Path loss for its corresponding downlink member carrier;
F0 is the uplink member carrier of the random access of current initiation, PL
f0Be its corresponding downlink member carrier path loss, backoff
f0Be its rollback parameter value;
If X＞Th determines to initiate random access next time on uplink member carrier f1;
If X＜Th determines to initiate random access next time on the uplink member carrier f0 of the random access of current initiation, time delay is at 0～backoff
f0Between select at random according to even distribution;
Th is for selecting thresholding, and α 1 and β 1 are default parameter, and Th, α 1, β 1 are so that after the member carrier selection, the access success rate is up to according to being determined by system emulation.
The 5th determining unit can also be further used for being specially at the path loss of the downlink member carrier corresponding according to each uplink member carrier, when reaching the random uplink member carrier that accesses of the definite initiation of rollback parameter of each uplink member carrier:
X
i=α
2* PL
fi+ β
2* backoff
fi, wherein, fi is each uplink member carrier, PL
f1Be the path loss of its corresponding downlink member carrier, backoff
fiBe its rollback parameter value;
Determine to select X
iMinimum member carrier is initiated next time access at random;
α 1 and β 1 are default parameter, and α 1, β 1 are so that member carrier selects rear access success rate to be up to according to being determined by system emulation.
For the convenience of describing, the each several part of the above device is divided into various modules with function or the unit is described respectively.Certainly, can realize the function of each module or unit in same or a plurality of softwares or hardware when enforcement is of the present invention.
The below describes with an example again.
Fig. 7 is the random access member carrier selection course implementing procedure schematic diagram of eNB indication, as shown in the figure, can comprise the steps:
Preferred member carrier judgement is carried out in step 701, base station, carries preferred member's carrier information in accidental access response message;
Whether step 703, judgement access at random be successful, is to change step 705 over to, otherwise changes step 704 over to;
By above-described embodiment as can be known, the present invention in force, eNB carries preferred member's carrier information in accidental access response message, UE determines again to initiate member carrier and the time delay of random access after random access failure according to preferred member's carrier information again.
Further, also provide four kinds of forms of the congestion control parameter that eNB carries in Msg2 message, determined that for eNB the BI of each member carrier provides specific embodiment.
Further, also provide UE to determine again to initiate the member carrier of random access and the scheme of time delay under variety of way.
By such scheme, the intercarrier that has solved many member carriers system accesses the congestion control problem at random, thereby has improved the random access success rate of whole system.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect fully.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code one or more.
The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the present invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of realizing in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby be provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction of carrying out on computer or other programmable devices.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (9)
1. member carrier and the method for the time of initiation of determining to initiate random access, is characterized in that, comprises the steps:
Evolution base station accesses at random density according to each uplink member carrier and/or probability of failure is determined to indicate for the rollback of each uplink member carrier of subscriber equipment, and wherein said random access density refers to the random access number of initiation in the unit interval;
Evolution base station carries the rollback indication for each uplink member carrier of subscriber equipment in accidental access response message;
Subscriber equipment is determined to initiate uplink member carrier and the initiation time of random access according to the rollback indication of each uplink member carrier in described accidental access response message next time.
2. the method for claim 1, is characterized in that,
Access at random according to each uplink member carrier density determines whether to carry this uplink member carrier in uplink member carrier rollback indication;
Access at random density and probability of failure according to each uplink member carrier and determine that described rollback parameter is used for determining to initiate the time of random access next time for the rollback parameter in each uplink member carrier rollback indication of subscriber equipment.
3. the method for claim 1, it is characterized in that, described subscriber equipment is according to the rollback indication of each uplink member carrier in described accidental access response message, determine to initiate uplink member carrier and the initiation time of random access next time, be according to the rollback parameter in the rollback indication of whether carrying the rollback indication for this uplink member carrier, carrying for this uplink member carrier, determine to initiate uplink member carrier and the initiation time of random access next time for one of the path loss of the corresponding downlink member carrier of this uplink member carrier and rollback parameter or its combination.
4. method as claimed in claim 3, it is characterized in that, described subscriber equipment is determined to initiate uplink member carrier and the initiation time of random access according to the rollback indication of each uplink member carrier in described accidental access response message next time, determines according to one of following mode:
Do not carry the rollback indication for the uplink member carrier of the random access of current initiation in accidental access response message, determine initiating immediately random access after random access failure on the uplink member carrier of the random access of current initiation;
Carrying for the rollback parameter in the rollback indication of the random uplink member carrier that accesses of current initiation in accidental access response message is 0, determines initiating immediately access at random after random access failure on the uplink member carrier of the random access of current initiation;
The rollback parameter that carries in accidental access response message in the rollback indication of a plurality of uplink member carrier is 0, determines initiating random access immediately on described rollback parameter is the corresponding uplink member carrier of downlink member carrier of path loss minimum in 0 uplink member carrier after random access failure;
The rollback parameter that carries in accidental access response message in the rollback indication of a plurality of uplink member carrier is 0, and be not 0 for the rollback parameter in the rollback indication of the uplink member carrier of the random access of current initiation, after random access failure the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of the uplink member carrier of the random access of current initiation and the path loss of corresponding downlink member carrier determine to initiate the uplink member carrier that accesses at random;
The rollback parameter that carries in accidental access response message in the rollback indication of a plurality of uplink member carrier is not 0, after random access failure the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier of random access.
5. an evolution base station, is characterized in that, comprising:
The BI determination module is used for accessing at random density and/or the definite rollback indication for each uplink member carrier of subscriber equipment of probability of failure according to each uplink member carrier, and wherein said random access density refers to the random access number of initiation in the unit interval;
BI adds module, is used for carrying for the rollback of each uplink member carrier of subscriber equipment at accidental access response message indicating;
Sending module is used for sending the accidental access response message that has carried for each uplink member carrier rollback indication of subscriber equipment.
6. evolution base station as claimed in claim 5, is characterized in that, described BI determination module further accesses according to each uplink member carrier density determines whether to carry this uplink member carrier in uplink member carrier rollback indication with son at random; Access at random density and probability of failure according to each uplink member carrier and determine that described rollback parameter is used for determining to initiate the time of random access next time for the rollback parameter in each uplink member carrier rollback indication of subscriber equipment.
7. a subscriber equipment, is characterized in that, comprising:
Receiver module is used for receiving and has carried for each uplink member carrier rollback of subscriber equipment according to the accidental access response message that shows;
The BI analysis module is used for the rollback indication according to described each uplink member carrier of accidental access response message, determines to initiate uplink member carrier and the initiation time of random access next time;
Wherein, described BI analysis module is further used for according to the rollback parameter in the rollback indication of whether carrying rollback indication for this uplink member carrier, carrying for this uplink member carrier, determines to initiate uplink member carrier and the initiation time of random access next time for one of the path loss of the corresponding downlink member carrier of this uplink member carrier and rollback parameter or its combination.
8. subscriber equipment as claimed in claim 7, is characterized in that, described BI analysis module comprises:
The first determining unit, be used for when accidental access response message does not carry the rollback indication of the uplink member carrier that accesses at random for current initiation, determine in initiation access at random on the uplink member carrier of the random access of current initiation immediately after random access failure;
The second determining unit, being used for carrying for the rollback parameter in the rollback indication of the random uplink member carrier that accesses of current initiation at accidental access response message is 0 o'clock, determines initiating immediately access at random after random access failure on the uplink member carrier of the random access of current initiation;
The 3rd determining unit, the rollback parameter that is used for carrying in the rollback indication of a plurality of uplink member carrier at accidental access response message is 0 o'clock, determines to initiate random access when described rollback parameter is the downlink member carrier institute of path loss minimum in 0 uplink member carrier on the uplink member carrier of answering immediately after random access failure;
The 4th determining unit, be 0 for the rollback parameter in the rollback indication that carries a plurality of uplink member carrier at accidental access response message, and be not 0 o'clock for the rollback parameter in the rollback indication of the uplink member carrier of the random access of current initiation, after random access failure the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of the uplink member carrier of the random access of current initiation and the path loss of corresponding downlink member carrier determine to initiate the uplink member carrier that accesses at random;
The 5th determining unit, the rollback parameter that is used for carrying in the rollback indication of a plurality of uplink member carrier at accidental access response message is not 0 o'clock, after random access failure the path loss of the downlink member carrier corresponding according to each uplink member carrier, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier of random access.
9. member carrier and the system of the time of initiation that determines to initiate random access, is characterized in that, comprising:
Evolution base station, be used for accessing at random density and/or the definite rollback indication for each uplink member carrier of subscriber equipment of probability of failure according to each uplink member carrier, and carry in accidental access response message for after the indication of the rollback of each uplink member carrier of subscriber equipment, be sent to subscriber equipment, wherein said random access density refers to the random access number of initiation in the unit interval;
Subscriber equipment is used for the rollback indication according to described each uplink member carrier of accidental access response message, determines to initiate uplink member carrier and the initiation time of random access next time.
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| CN 200910080685 CN101848539B (en) | 2009-03-25 | 2009-03-25 | Method and equipment for determining member carrier initiating random access and initiating time |
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| CN 200910080685 CN101848539B (en) | 2009-03-25 | 2009-03-25 | Method and equipment for determining member carrier initiating random access and initiating time |
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Families Citing this family (19)
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| CN102469555B (en) * | 2010-11-05 | 2014-12-10 | 中兴通讯股份有限公司 | Method and system for accessing terminal to network |
| CN102573097B (en) * | 2010-12-22 | 2014-09-24 | 上海中兴软件有限责任公司 | Method for random access and terminal |
| CN102573098B (en) * | 2010-12-24 | 2015-07-29 | 华为技术有限公司 | communication information sending method, device and system |
| US8830908B2 (en) * | 2011-02-18 | 2014-09-09 | Qualcomm Incorporated | Apparatus and method for facilitating fallback access schemes |
| CN102695285B (en) * | 2011-03-21 | 2014-12-03 | 华为技术有限公司 | Random access method under multi-carrier scenarios, and device |
| CN102740492B (en) * | 2011-04-01 | 2018-01-02 | 中兴通讯股份有限公司 | Random access control method and system |
| CN102883441B (en) * | 2011-07-15 | 2015-04-22 | 华为技术有限公司 | Wireless broadband communication method and device |
| CN103987127B (en) * | 2013-02-07 | 2017-12-05 | 华为技术有限公司 | A kind of cut-in method, device and system |
| KR101867830B1 (en) * | 2014-02-16 | 2018-06-18 | 엘지전자 주식회사 | Method and apparatus for transmitting data in wireless communication system |
| CN106612557B (en) * | 2015-10-26 | 2020-02-18 | 中国移动通信集团公司 | Transmission method, base station and user equipment for downlink ACK/NACK information |
| CN107027186A (en) * | 2016-02-02 | 2017-08-08 | 中兴通讯股份有限公司 | The control method of Stochastic accessing, apparatus and system |
| CN107277933B (en) * | 2016-04-06 | 2023-05-02 | 中兴通讯股份有限公司 | Random access channel congestion processing method and device |
| CN108271275B (en) | 2017-01-04 | 2021-02-05 | 电信科学技术研究院 | Method and device for competing random access |
| CN108696893B (en) * | 2017-04-07 | 2023-03-17 | 中兴通讯股份有限公司 | Uplink data sending method, device, base station and user equipment |
| CN109803313B (en) * | 2017-11-17 | 2020-10-30 | 电信科学技术研究院 | Congestion control method, terminal and computer readable storage medium |
| CN109842954A (en) * | 2017-11-24 | 2019-06-04 | 华为技术有限公司 | A kind of accidental access method and device |
| CN112672434A (en) * | 2018-01-25 | 2021-04-16 | Oppo广东移动通信有限公司 | Random access method, wireless device, and storage medium |
| CN110621079B (en) * | 2018-06-19 | 2021-04-13 | 维沃移动通信有限公司 | Random access resource selection method and terminal equipment |
| CN115379586B (en) * | 2022-08-22 | 2025-02-14 | 上海移芯通信科技股份有限公司 | A random access fallback optimization method and device |
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