CN101848539A - 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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- CN101848539A CN101848539A CN200910080685A CN200910080685A CN101848539A CN 101848539 A CN101848539 A CN 101848539A CN 200910080685 A CN200910080685 A CN 200910080685A CN 200910080685 A CN200910080685 A CN 200910080685A CN 101848539 A CN101848539 A CN 101848539A
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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, the member carrier that particularly a kind of definite initiation inserts at random and initiation time method and equipment.
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 maximum bandwidth 20MHz of LTE system.Based on improve peak rate, with the LTE system compatible with make full use of the needs of frequency resource, the LTE-A system has introduced CA (Carrier Aggregation, carrier aggregation) technology.
Carrier aggregation technology is meant that up-downgoing respectively comprises a plurality of member carriers in a sub-district, rather than has only the pattern of a cover carrier wave before in LTE and the wireless communication system.ENB (evolution base station) is to unified management of the member carrier of the many covers in the sub-district and scheduling, and the conversion of different members intercarrier is a resource allocation problem in a sub-district.Member carrier can be continuous or discrete, for the LTE compatibility, the maximum bandwidth of each member carrier is 20MHz, the bandwidth between each member carrier can be identical or different.
2, random access procedure brief introduction.
Access technology is the critical function of modern cell mobile communication systems at random, under a lot of scenes, must insert at first at random, could continue follow-up operation.With the LTE system is example, and the scene that need insert at random 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 behind 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 does not also have special-purpose dispatch request resource;
4, eNB has downlink data to arrive, but can't directly dispatch UE, is in the uplink loss state at present such as UE;
5, handoff procedure.
Random access procedure among the LTE is divided into two kinds at present:
1, competition inserts at random;
2, non-competing access at random.
Fig. 1 is competition random access procedure implementing procedure schematic diagram, and Msg is message (Message) among the figure, as shown in the figure, may further comprise the steps:
Step 103, Msg 3:UE send Scheduled Transmission (based on the transmission of scheduling) to eNB;
In competition inserts at random, UE selects preamble (random access leader sequence) at random, and at PRACH (the Physical Random Access Channel that selects according to certain rule, Physical Random Access Channel) goes up the selected preamble of transmission, because randomness, the preamble that different UEs is selected may be identical, causes the competition between the UE thus.Under the situation that competition takes place, have only a UE can finally insert success at most.The UE of competition failure can only postpone a period of time to initiate competition again and inserts at random.Above-mentioned 5 kinds of scenes all can be used competition and insert at random.
Fig. 2 is non-competing random access procedure implementing procedure schematic diagram, as shown in the figure, may further comprise the steps:
Step 201, eNB send RA Preamble assignment (random access leader sequence distribution) message to UE;
Step 202, UE return Random Access Preamble (random access leader sequence) message to eNB;
Step 203, eNB return Random Access Response (accidental access response) message to UE.
Also introduced non-competing access at random among the LTE, eNB reserves a part of preamble in non-competing access at random, is called dedicated preamble, and the UE that competition inserts at random can not select these preamble.In the non-competing process that inserts at random, eNB is that UE selects a dedicated preamble, after UE obtains this dedicated preamble, sends this dedicated preamble on the PRACH resource of selecting according to certain rule.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 access at random is applied to back two kinds and inserts scene at random, and promptly downlink data arrives and handoff procedure.
3, insert the jamming control method brief introduction at random.
Random access procedure has competition to solve the possibility of failure naturally, competition is solved the user of failure, if what adopt is non-competing access at random, after determining that competition solves failure, can use the private resource of network side appointment to initiate again to insert at random at once, if what adopt is to compete at random to insert, then need to take suitable jamming control method.
The effect that inserts jamming control method at random is to avoid the user that initiation inserts at random in the short time too much, inserts success rate at random to improve.The LTE system adopts back off (rollback) mechanism to insert congested control at random:
1, eNB carries BI (BackoffIndicator, rollback indication) in accidental access response message (Msg2);
2, UE receives and storage BI information, if competition solves failure, initiates again to insert at random according to the BI indication.If BI=0, UE initiate to insert at random after competition solves failure at once again; If BI＞0 (the backoff parameter of BI correspondence is with the ms counting among the LTE, and maximum is 960ms), UE select one to initiate constantly to insert at random according to even distribution between 0～backoff parameter value at random next time.
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 congested control on the 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 initiate situation about inserting at random again.
Summary of the invention
The invention provides member carrier and initiation time method and equipment that a kind of definite initiation inserts at random, under many member carriers situation, insert congested control problem at random in order to solve.
Member carrier and initiation time method that the embodiment of the invention provides a kind of definite initiation to insert at random comprise the steps:
ENB determines the BI at each uplink member carrier of UE;
ENB carries the BI at each uplink member carrier of UE in accidental access response message;
UE determines to initiate the uplink member carrier and the initiation time of access at random next time according to the BI of each uplink member carrier in the described accidental access response message.
Preferably, eNB comprises when the BI that determines at each uplink member carrier of UE:
Insert density and/or the definite BI of probability of failure at random according to each uplink member carrier at each uplink member carrier of UE.
Preferably, insert density determines whether to carry this uplink member carrier in uplink member carrier BI at random according to each uplink member carrier;
Insert density and probability of failure at random according to each uplink member carrier and determine at the rollback parameter among each uplink member carrier BI of UE, described rollback parameter is used for determining initiating time of next time inserting at random.
Preferably, described UE is according to the BI of each uplink member carrier in the described accidental access response message, determining to initiate next time uplink member carrier and initiation time of inserting at random, is to determine to initiate next time uplink member carrier and initiation time of inserting at random according to the rollback parameter among the BI that whether carries BI at this uplink member carrier, carries at this uplink member carrier, at one of the path loss of the pairing downlink member carrier of this uplink member carrier and rollback parameter or its combination.
Preferably, described UE determines to initiate the uplink member carrier and the initiation time of access at random next time according to the BI of each uplink member carrier in the described accidental access response message, determines according to one of following mode or its combination:
Do not carry the BI of the uplink member carrier that inserts at random at current initiation in the accidental access response message, then determine on the uplink member carrier that current initiation inserts at random, initiating immediately to insert at random behind the access failure at random;
The rollback parameter of carrying in the accidental access response message among the BI of the uplink member carrier that inserts at random at current initiation is 0, then determines initiating immediately to insert at random on the uplink member carrier that current initiation inserts at random behind the access failure at random;
The rollback parameter that carries in the accidental access response message among the BI of a plurality of uplink member carrier is 0, then determines behind access failure at random immediately to initiate to insert at random on described rollback parameter is the pairing uplink member carrier of downlink member carrier of path loss minimum in 0 the uplink member carrier;
The rollback parameter that carries in the accidental access response message among the BI of a plurality of uplink member carrier is 0, and the rollback parameter among the BI of the uplink member carrier that inserts at random at current initiation is not 0, then behind access failure at random according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of the uplink member carrier that inserts at random of current initiation determine the initiation uplink member carrier of access at random with the path loss of corresponding downlink member carrier;
The rollback parameter that carries in the accidental access response message among the BI of a plurality of uplink member carrier is not 0, then behind access failure at random according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier that inserts at random.
Preferably, the path loss of described downlink member carrier according to each uplink member carrier correspondence, and the rollback parameter of the uplink member carrier that inserts at random of current initiation determine the initiation uplink member carrier of access at random with the path loss of corresponding downlink member carrier, 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 that current initiation inserts at random, PL
F0Be its corresponding downlink member carrier path loss, backoff
F0Be its rollback parameter value;
If X＞Th determines to initiate to insert at random next time on uplink member carrier f1;
If X＜Th determines to initiate to insert at random next time on the uplink member carrier f0 that current initiation inserts at random, 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 up to according to being determined by system emulation so that member carrier selects the back to insert success rate.
Preferably, the path loss of described downlink member carrier according to each uplink member carrier correspondence, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier that inserts at random, 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 initiates to insert at random next time;
α 1 and β 1 are default parameter, and α 1, β 1 are up to according to being determined by system emulation so that member carrier selects the back to insert success rate.
A kind of evolution base station also is provided in the embodiment of the invention, has comprised:
The BI determination module is used for definite BI at each uplink member carrier of UE;
BI adds module, is used for carrying BI at each uplink member carrier of UE at accidental access response message;
Sending module is used to send the accidental access response message that has carried at each uplink member carrier BI of UE.
Preferably, described BI determination module is further used for inserting density and/or the definite BI at each uplink member carrier of UE of probability of failure at random according to each uplink member carrier.
Preferably, described BI determination module is further used for inserting density determines whether to carry this uplink member carrier in uplink member carrier BI at random according to each uplink member carrier; Insert density and probability of failure at random according to each uplink member carrier and determine at the rollback parameter among each uplink member carrier BI of UE, described rollback parameter is used for determining initiating time of next time inserting at random.
A kind of subscriber equipment is provided again in the embodiment of the invention, has comprised:
Receiver module is used to receive the accidental access response message that has carried at each uplink member carrier BI of UE;
The BI analysis module is used for the BI according to described each uplink member carrier of accidental access response message, determines to initiate the uplink member carrier and the initiation time of access at random next time.
Preferably, described BI analysis module is further used for determining to initiate next time according to the rollback parameter among the BI that whether carries BI at this uplink member carrier, carries at this uplink member carrier, at one of the path loss of the pairing downlink member carrier of this uplink member carrier and rollback parameter or its combination uplink member carrier and initiation time of inserting at random.
Preferably, described BI analysis module comprises:
First determining unit, be used for when accidental access response message does not carry the BI of the uplink member carrier that inserts at random at current initiation, then determine on the uplink member carrier that current initiation inserts at random, initiating immediately to insert at random behind the access failure at random;
Second determining unit, the rollback parameter that is used for carrying among the BI of the uplink member carrier that inserts at random at current initiation at accidental access response message is 0 o'clock, then determines initiating immediately to insert at random on the uplink member carrier that current initiation inserts at random behind the access failure at random;
The 3rd determining unit, the rollback parameter that is used for carrying among the BI of a plurality of uplink member carrier at accidental access response message is 0 o'clock, then determines behind access failure at random immediately to initiate to insert at random on described rollback parameter is the pairing uplink member carrier of downlink member carrier of path loss minimum in 0 the uplink member carrier;
The 4th determining unit, the rollback parameter that is used for carrying among the BI of a plurality of uplink member carrier at accidental access response message is 0, and the rollback parameter among the BI of the uplink member carrier that inserts at random at current initiation is not 0 o'clock, then behind access failure at random according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of the uplink member carrier that inserts at random of current initiation determine the initiation uplink member carrier of access at random with the path loss of corresponding downlink member carrier;
The 5th determining unit, the rollback parameter that is used for carrying among the BI of a plurality of uplink member carrier at accidental access response message is not 0 o'clock, then behind access failure at random according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier that inserts at random.
Preferably, described the 4th determining unit be further used for according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of the uplink member carrier that inserts at random of current initiation and the path loss of corresponding downlink member carrier determine that initiation at random during the uplink member carrier of access, is 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 that current initiation inserts at random, PL
F0Be its corresponding downlink member carrier path loss, backoff
F0Be its rollback parameter value;
If X＞Th determines to initiate to insert at random next time on uplink member carrier f1;
If X＜Th determines to initiate to insert at random next time on the uplink member carrier f0 that current initiation inserts at random, 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 up to according to being determined by system emulation so that member carrier selects the back to insert success rate.
Preferably, described the 5th determining unit be further used for according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of each uplink member carrier determine to initiate to insert at random uplink member carrier the time, 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 initiates to insert at random next time;
α 1 and β 1 are default parameter, and α 1, β 1 are up to according to being determined by system emulation so that member carrier selects the back to insert success rate.
The member carrier and the system of the time of initiation that provide a kind of definite initiation to insert at random in the embodiment of the invention comprise:
ENB is used for determining the BI at each uplink member carrier of UE, and carry BI at 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 the uplink member carrier and the initiation time of access at random next time.
Beneficial effect of the present invention is as follows:
In the invention process, eNB at first determines the BI at each uplink member carrier of UE, and in accidental access response message, carry BI at each uplink member carrier of UE, make UE to determine to initiate the uplink member carrier and the initiation time of access at random next time according to the BI of each uplink member carrier in the accidental access response message.Pass through such scheme, owing in accidental access response message, carried the BI of each member carrier of UE, make UE to determine to initiate the member carrier of access at random at the situation of each member carrier, and can determine the member carrier of initiating to insert at random 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 congested control on the single member carrier, the intercarrier that can better solve many member carriers system inserts congested control problem at random, has improved the access success rate at random of whole system.
Description of drawings
Fig. 1 is a competition random access procedure implementing procedure schematic diagram in the background technology;
Fig. 2 is a non-competing random access procedure implementing procedure schematic diagram in the background technology;
Fig. 3 determines to initiate the member carrier that inserts at random and initiates time method implementing procedure schematic diagram in the embodiment of the invention;
Fig. 4 is the member carrier and the system configuration schematic diagram of the time of initiation of determining to initiate access at random in the embodiment of the invention;
Fig. 5 is an evolution base station structural representation in the embodiment of the invention;
Fig. 6 is a user device architecture schematic diagram in the embodiment of the invention;
Fig. 7 is the member carrier of the access at random selection course implementing procedure schematic diagram of eNB indication in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
Fig. 3 initiates the member carrier that inserts at random and initiates time method implementing procedure schematic diagram for determining, as shown in the figure, can comprise the steps: when carrying out congested control
There is above-mentioned steps as can be seen, step 301, the 302nd, the processing that the eNB side is carried out, and step 303 is the processing of UE side, describes in two sub-sections below.
One, eNB side.
In the invention process, eNB carries preferred member's carrier information in accidental access response message (Msg2), if be used to indicate UE at random behind the access failure, initiates the preferred member carrier that inserts at random again.
Whether eNB by carrying BI to each member carrier, and determine by the value of Backoff among the control 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 inserts density at random;
Insert density at random and be meant the access number of initiating in the unit interval at random, obviously, preferentially select the little uplink member carrier of density to initiate to insert at random.
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 the backoff parameter in force is to insert density and probability of failure at random according to each uplink member carrier to calculate UE this needs to postpone to initiate time of inserting at random at random behind access failure.
That is, eNB comprises when the BI that determines at each uplink member carrier of UE: insert density and/or probability of failure at random according to each uplink member carrier and determine BI at each uplink member carrier of UE.
In the enforcement, can insert density determines whether to carry this uplink member carrier in uplink member carrier BI at random according to each uplink member carrier;
Further can also insert density and probability of failure at random according to each uplink member carrier and determine at the rollback parameter among each uplink member carrier BI of UE, described rollback parameter is used for determining initiating time of next time inserting at random.
Mode thus, with whether be the uplink member carrier that inserts at random of current initiation, at this uplink member carrier whether carry BI, rollback parameter among the BI that carries at this uplink member carrier is 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 among the BI:
First kind, do not carry any congestion control parameter information, this situation represents that UE can initiate immediately to insert at random in current uplink member carrier;
Second kind, to indicate one or several backoff parameter be 0 member carrier (i.e. the member carrier that can initiate immediately to insert at random);
The third, to indicate one or several backoff parameter be the backoff parameter of the member carrier that inserts at random of 0 member carrier and 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 that current initiation inserts at random.
Two, UE side.
Owing to above-mentioned four kinds of situations only may occur according to congestion control parameter among the Msg2, promptly, whether be the uplink member carrier that inserts at random of current initiation, at four kinds of situations that whether this uplink member carrier carries BI, rollback parameter region among the BI that carries at this uplink member carrier is told, UE can determine to initiate next time uplink member carrier and initiation time of inserting at random in conjunction with the path loss of the pairing downlink member carrier of each uplink member carrier.
In the 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 that inserts at random and the time of initiation, just can be, determine to initiate the uplink member carrier and the initiation time of access at random next time at one of the path loss of the pairing downlink member carrier of this uplink member carrier and rollback parameter or its combination according to the rollback parameter among the BI that whether carries BI at this uplink member carrier, carries at this uplink member carrier.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 inserts at random at current initiation in the accidental access response message, then determine on the uplink member carrier that current initiation inserts at random, initiating immediately to insert at random behind the access failure at random;
The rollback parameter of carrying in the accidental access response message among the BI of the uplink member carrier that inserts at random at current initiation is 0, then determines initiating immediately to insert at random on the uplink member carrier that current initiation inserts at random behind the access failure at random.
Comprise the situation of the uplink member carrier that current initiation inserts at random in the preferred member carrier at first kind of form of Msg2 congestion control parameter and second kind of form, UE is initiating to insert at random at current member carrier behind the access failure at random immediately.
2, the rollback parameter that carries in the accidental access response message among the BI of a plurality of uplink member carrier is 0, then determines behind access failure at random immediately to initiate to insert at random on the rollback parameter is the pairing uplink member carrier of downlink member carrier of path loss minimum in 0 the uplink member carrier.
At second kind of form of Msg2 congestion control parameter, UE selects the downlink member carrier of path loss minimum according to the path loss of each downlink member carrier of the uplink member carrier correspondence of indicating among the Msg2, initiates again to insert at random on the uplink member carrier corresponding with it.
3, the rollback parameter that carries in the accidental access response message among the BI of a plurality of uplink member carrier is 0, and the rollback parameter among the BI of the uplink member carrier that inserts at random at current initiation is not 0, then behind access failure at random according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of the uplink member carrier that inserts at random of current initiation determine the initiation uplink member carrier of access at random with the path loss of corresponding downlink member carrier.
In the 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 that current initiation inserts at random, PL
F0Be its corresponding downlink member carrier path loss, backoff
F0Be its rollback parameter value;
If X＞Th determines to initiate to insert at random next time on uplink member carrier f1;
If X＜Th determines to initiate to insert at random next time on the uplink member carrier f0 that current initiation inserts at random, 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 up to according to being determined by system emulation so that member carrier selects the back to insert success rate.
This kind situation is at the third form of Msg2 congestion control parameter, UE takes all factors into consideration the downlink member carrier path loss of preferred member carrier correspondence, the current downlink member carrier path loss that inserts the uplink member carrier correspondence at random, the backoff parameter of current member carrier is determined member carrier and time delay that initiation again inserts at random.
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 to be designated as PL with the current corresponding downlink member carrier path loss of uplink member carrier that inserts at random
F0
At last, calculate X=α
1* (PL
F0-PL
F1)+β
1* backoff
F0If X＞Th initiates to insert at random next time on preferred member carrier f1; If X＜Th initiates to insert at random 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, notify by the agreement regulation or by system message.
Th is pre-set selection thresholding, and normally an empirical value can determine that finally this is the technology of knowing of this area by methods such as emulation.α
1And β
1The foundation of selecting all is to make member carrier select back access success rate the highest, can be determined by system emulation.The broadcast that system message just is meant.Above parameter can fix in agreement or be notified by broadcasting (system message).
4, the rollback parameter that carries in the accidental access response message among the BI of a plurality of uplink member carrier is not 0, then behind access failure at random according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier that inserts at random.
In the 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 initiates to insert at random next time;
α 1 and β 1 are default parameter, and α 1, β 1 are up to according to being determined by system emulation so that member carrier selects the back to insert success rate.
This is at the 4th kind of form of Msg2 congestion control parameter, to each preferred member carrier, according to the path loss PL of its corresponding downlink member carrier
FiBackoff parameter b ackoff with indication
Fi, calculate X
i=α
2* PL
Fi+ β
2* backoff
Fi, select X then
iMinimum member carrier initiates to insert at random next time, and time delay is at 0～backoff
FiBetween select at random according to even distribution.α
2And β
2Be definite parameter, by the agreement regulation or by the system message notice, the foundation of selection all is to make member carrier select back access success rate the highest, can be determined by system emulation.The broadcast that system message just is meant.Above parameter can fix in agreement or be notified by broadcasting (system message).
Based on same inventive concept, the member carrier and system, evolution base station, the subscriber equipment of the time of initiation that also provide a kind of definite initiation to insert at random in the embodiment of the invention, because the principle that these equipment are dealt with problems is similar to member carrier and initiation time method that a kind of definite initiation inserts at random, therefore the enforcement of these equipment can repeat part and not give unnecessary details referring to the enforcement of method.
Fig. 4 as shown in the figure, can comprise in the system for determining to initiate the member carrier and the system configuration schematic diagram of the time of initiation of access at random:
ENB401 is used for determining the BI at each uplink member carrier of UE, and carry BI at 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 the uplink member carrier and the initiation time of access at random next time.
Be that example describes with eNB and UE respectively more below.
Fig. 5 is the evolution base station structural representation, as shown in the figure, can comprise among the eNB:
BI adds module 502, is used for carrying BI at each uplink member carrier of UE at accidental access response message;
Sending module 503 is used to send the accidental access response message that has carried at each uplink member carrier BI of UE.
In the enforcement, the BI determination module can be further used for inserting density and/or the definite BI at each uplink member carrier of UE of probability of failure at random according to each uplink member carrier.
The BI determination module can also be further used for inserting density determines whether to carry this uplink member carrier in uplink member carrier BI at random according to each uplink member carrier; Insert density and probability of failure at random according to each uplink member carrier and determine at the rollback parameter among each uplink member carrier BI of UE, described rollback parameter is used for determining initiating time of next time inserting at random.
Fig. 6 is the user device architecture schematic diagram, comprising:
The BI analysis module can be further used for determining to initiate next time according to the rollback parameter among the BI that whether carries BI at this uplink member carrier, carries at this uplink member carrier, at one of the path loss of the pairing downlink member carrier of this uplink member carrier and rollback parameter or its combination uplink member carrier and initiation time of inserting at random in the enforcement.
Can comprise in the BI analysis module:
First determining unit, be used for when accidental access response message does not carry the BI of the uplink member carrier that inserts at random at current initiation, then determine on the uplink member carrier that current initiation inserts at random, initiating immediately to insert at random behind the access failure at random; The uplink member carrier that inserts is at random initiated in order to determine congestion control parameter in this unit under first kind of form.
Second determining unit, the rollback parameter that is used for carrying among the BI of the uplink member carrier that inserts at random at current initiation at accidental access response message is 0 o'clock, then determines initiating immediately to insert at random on the uplink member carrier that current initiation inserts at random behind the access failure at random; The uplink member carrier that inserts is at random initiated in order to determine congestion control parameter in this unit under second kind of form.
The 3rd determining unit, the rollback parameter that is used for carrying among the BI of a plurality of uplink member carrier at accidental access response message is 0 o'clock, then determines behind access failure at random immediately to initiate to insert at random on described rollback parameter is the pairing uplink member carrier of downlink member carrier of path loss minimum in 0 the uplink member carrier; The uplink member carrier that inserts is at random initiated in order to determine congestion control parameter in this unit under second kind of form.
The 4th determining unit, the rollback parameter that is used for carrying among the BI of a plurality of uplink member carrier at accidental access response message is 0, and the rollback parameter among the BI of the uplink member carrier that inserts at random at current initiation is not 0 o'clock, then behind access failure at random according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of the uplink member carrier that inserts at random of current initiation determine the initiation uplink member carrier of access at random with the path loss of corresponding downlink member carrier; The uplink member carrier that inserts is at random initiated in order to determine congestion control parameter in this unit under the third form.
The 5th determining unit, the rollback parameter that is used for carrying among the BI of a plurality of uplink member carrier at accidental access response message is not 0 o'clock, then behind access failure at random according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier that inserts at random, the uplink member carrier of access is at random initiated in order to determine congestion control parameter in this unit under the 4th kind of form.
In the enforcement, the 4th determining unit can also be further used for according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of the uplink member carrier that inserts at random of current initiation and the path loss of corresponding downlink member carrier determine that initiation at random during the uplink member carrier of access, is 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 that current initiation inserts at random, PL
F0Be its corresponding downlink member carrier path loss, backoff
F0Be its rollback parameter value;
If X＞Th determines to initiate to insert at random next time on uplink member carrier f1;
If X＜Th determines to initiate to insert at random next time on the uplink member carrier f0 that current initiation inserts at random, 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 up to according to being determined by system emulation so that member carrier selects the back to insert success rate.
The 5th determining unit can also be further used for according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of each uplink member carrier determine to initiate to insert at random uplink member carrier the time, 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 initiates to insert at random next time;
α 1 and β 1 are default parameter, and α 1, β 1 are up to according to being determined by system emulation so that member carrier selects the back to insert success rate.
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, when enforcement is of the present invention, can in same or a plurality of softwares or hardware, realize the function of each module or unit.
Describe with an example more below.
Fig. 7 as shown in the figure, can comprise the steps: for the member carrier of the access at random selection course implementing procedure schematic diagram of eNB indication
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 insert successful at random, are then to change step 705 over to, otherwise change step 704 over to;
By the foregoing description as can be known, the present invention in force, eNB carries preferred member's carrier information in accidental access response message, UE determines to initiate again behind the access failure at random the member carrier and the time delay that insert at random 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 under variety of way, to determine to initiate again the member carrier of access at random and the scheme of time delay.
By such scheme, the intercarrier that has solved many member carriers system inserts congested control problem at random, thereby has improved the access success rate at random of whole system.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the 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 the function that is implemented 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 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 implemented in 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 the instruction of carrying out on computer or other programmable devices is provided for being implemented in 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.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then 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 to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (16)
1. determine the member carrier of initiating to insert at random and initiate time method for one kind, it is characterized in that, comprise the steps:
Evolution base station is determined the rollback indication at each uplink member carrier of subscriber equipment;
Evolution base station carries the rollback indication at each uplink member carrier of subscriber equipment in accidental access response message;
Subscriber equipment is determined to initiate the uplink member carrier and the initiation time of access at random next time according to the rollback indication of each uplink member carrier in the described accidental access response message.
2. the method for claim 1 is characterized in that, when evolution base station is indicated at definite rollback at each uplink member carrier of subscriber equipment, comprising:
Insert density and/or the definite rollback indication of probability of failure at random according to each uplink member carrier at each uplink member carrier of subscriber equipment.
3. method as claimed in claim 2 is characterized in that,
Insert density determines whether to carry this uplink member carrier in uplink member carrier rollback indication at random according to each uplink member carrier;
Insert density and probability of failure at random according to each uplink member carrier and determine at the rollback parameter in each uplink member carrier rollback indication of subscriber equipment, described rollback parameter is used for determining initiating time of next time inserting at random.
4. 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 the described accidental access response message, determining to initiate next time uplink member carrier and initiation time of inserting at random, is to determine to initiate next time uplink member carrier and initiation time of inserting at random according to the rollback parameter in the rollback indication of whether carrying the rollback indication at this uplink member carrier, carrying at this uplink member carrier, at one of the path loss of the pairing downlink member carrier of this uplink member carrier and rollback parameter or its combination.
5. method as claimed in claim 4, it is characterized in that, described subscriber equipment is determined to initiate the uplink member carrier and the initiation time of access at random next time according to the rollback indication of each uplink member carrier in the described accidental access response message, determines according to one of following mode or its combination:
Do not carry the rollback indication of the uplink member carrier that inserts at random at current initiation in the accidental access response message, then determine on the uplink member carrier that current initiation inserts at random, initiating immediately to insert at random behind the access failure at random;
The rollback parameter of carrying in the accidental access response message in the rollback indication of the uplink member carrier that inserts at random at current initiation is 0, then determines initiating immediately to insert at random on the uplink member carrier that current initiation inserts at random behind the access failure at random;
The rollback parameter that carries in the accidental access response message in the rollback indication of a plurality of uplink member carrier is 0, then determines behind access failure at random immediately to initiate to insert at random on described rollback parameter is the pairing uplink member carrier of downlink member carrier of path loss minimum in 0 the uplink member carrier;
The rollback parameter that carries in the accidental access response message in the rollback indication of a plurality of uplink member carrier is 0, and the rollback parameter in the indication of the rollback of the uplink member carrier that inserts at random at current initiation is not 0, then behind access failure at random according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of the uplink member carrier that inserts at random of current initiation determine the initiation uplink member carrier of access at random with the path loss of corresponding downlink member carrier;
The rollback parameter that carries in the accidental access response message in the rollback indication of a plurality of uplink member carrier is not 0, then behind access failure at random according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier that inserts at random.
6. method as claimed in claim 5, it is characterized in that, the path loss of described downlink member carrier according to each uplink member carrier correspondence, and the rollback parameter of the uplink member carrier that inserts at random of current initiation determine the initiation uplink member carrier of access at random with the path loss of corresponding downlink member carrier, 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 that current initiation inserts at random, PL
F0Be its corresponding downlink member carrier path loss, backoff
F0Be its rollback parameter value;
If X＞Th determines to initiate to insert at random next time on uplink member carrier f1;
If X＜Th determines to initiate to insert at random next time on the uplink member carrier f0 that current initiation inserts at random, 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 up to according to being determined by system emulation so that member carrier selects the back to insert success rate.
7. method as claimed in claim 5 is characterized in that, the path loss of described downlink member carrier according to each uplink member carrier correspondence, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier that inserts at random, 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 initiates to insert at random next time;
α 1 and β 1 are default parameter, and α 1, β 1 are up to according to being determined by system emulation so that member carrier selects the back to insert success rate.
8. an evolution base station is characterized in that, comprising:
The BI determination module is used for definite rollback indication at each uplink member carrier of subscriber equipment;
BI adds module, is used for carrying at the indication of the rollback of each uplink member carrier of subscriber equipment at accidental access response message;
Sending module is used to send the accidental access response message that has carried at each uplink member carrier rollback indication of subscriber equipment.
9. evolution base station as claimed in claim 8 is characterized in that, described BI determination module is further used for inserting density and/or the definite rollback indication at each uplink member carrier of subscriber equipment of probability of failure at random according to each uplink member carrier.
10. evolution base station as claimed in claim 9 is characterized in that, described BI determination module is further used for inserting density determines whether to carry this uplink member carrier in uplink member carrier rollback indication at random according to each uplink member carrier; Insert density and probability of failure at random according to each uplink member carrier and determine at the rollback parameter in each uplink member carrier rollback indication of subscriber equipment, described rollback parameter is used for determining initiating time of next time inserting at random.
11. a subscriber equipment is characterized in that, comprising:
Receiver module is used to receive the accidental access response message that has carried at each uplink member carrier rollback indication of subscriber equipment;
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 the uplink member carrier and the initiation time of access at random next time.
12. subscriber equipment as claimed in claim 11, it is characterized in that described BI analysis module is further used for determining to initiate next time according to the rollback parameter in the rollback indication of whether carrying rollback indication at this uplink member carrier, carrying at this uplink member carrier, at one of the path loss of the pairing downlink member carrier of this uplink member carrier and rollback parameter or its combination uplink member carrier and initiation time of inserting at random.
13. subscriber equipment as claimed in claim 12 is characterized in that, described BI analysis module comprises:
First determining unit, be used for when accidental access response message does not carry the rollback indication of the uplink member carrier that inserts at random at current initiation, then determine on the uplink member carrier that current initiation inserts at random, initiating immediately to insert at random behind the access failure at random;
Second determining unit, the rollback parameter that is used for carrying in the rollback indication of the uplink member carrier that inserts at random at current initiation at accidental access response message is 0 o'clock, then determines initiating immediately to insert at random on the uplink member carrier that current initiation inserts at random behind the access failure at random;
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, then determines behind access failure at random immediately to initiate to insert at random on described rollback parameter is the pairing uplink member carrier of downlink member carrier of path loss minimum in 0 the uplink member carrier;
The 4th 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, and the rollback parameter in the indication of the rollback of the uplink member carrier that inserts at random at current initiation is not 0 o'clock, then behind access failure at random according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of the uplink member carrier that inserts at random of current initiation determine the initiation uplink member carrier of access at random with the path loss of corresponding downlink member carrier;
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, then behind access failure at random according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of each uplink member carrier determine to initiate the uplink member carrier that inserts at random.
14. subscriber equipment as claimed in claim 13, it is characterized in that, described the 4th determining unit be further used for according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of the uplink member carrier that inserts at random of current initiation and the path loss of corresponding downlink member carrier determine that initiation at random during the uplink member carrier of access, is 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 that current initiation inserts at random, PL
F0Be its corresponding downlink member carrier path loss, backoff
F0Be its rollback parameter value;
If X＞Th determines to initiate to insert at random next time on uplink member carrier f1;
If X＜Th determines to initiate to insert at random next time on the uplink member carrier f0 that current initiation inserts at random, 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 up to according to being determined by system emulation so that member carrier selects the back to insert success rate.
15. subscriber equipment as claimed in claim 13, it is characterized in that, described the 5th determining unit be further used for according to the path loss of the downlink member carrier of each uplink member carrier correspondence, and the rollback parameter of each uplink member carrier determine to initiate to insert at random uplink member carrier the time, 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 initiates to insert at random next time;
α 1 and β 1 are default parameter, and α 1, β 1 are up to according to being determined by system emulation so that member carrier selects the back to insert success rate.
16. a member carrier and the system of the time of initiation that determines to initiate access at random is characterized in that, comprising:
Evolution base station is used for determining the rollback indication at each uplink member carrier of subscriber equipment, and carry rollback indication at each uplink member carrier of subscriber equipment in accidental access response message after, is sent to subscriber equipment;
Subscriber equipment is used for the rollback indication according to described each uplink member carrier of accidental access response message, determines to initiate the uplink member carrier and the initiation time of access at random 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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|---|---|
| CN101848539A true CN101848539A (en) | 2010-09-29 |
| CN101848539B CN101848539B (en) | 2013-06-05 |
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