CN102056297A - Random access method and equipment in multi-carrier system - Google Patents
Random access method and equipment in multi-carrier system Download PDFInfo
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- CN102056297A CN102056297A CN2009102368479A CN200910236847A CN102056297A CN 102056297 A CN102056297 A CN 102056297A CN 2009102368479 A CN2009102368479 A CN 2009102368479A CN 200910236847 A CN200910236847 A CN 200910236847A CN 102056297 A CN102056297 A CN 102056297A
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Abstract
The embodiment of the invention discloses a random access method and equipment in a multi-carrier system. The technical scheme proposed by the embodiment of the invention is applied to confirm that a treatment flow of a random access process can be issued in a plurality of uplink carriers in a mobile communication system by introducing the multi-carriers so as to issue random access treatment in the multi-carrier system.
Description
Technical field
The embodiment of the invention relates to communication technical field, accidental access method and equipment in particularly a kind of multicarrier system.
Background technology
At senior Long Term Evolution (Long Term Evolution Advanced, LTE-A) in the system, to the requirement of peak rate than Long Term Evolution (Long Term Evolution, LTE) system has improved a lot, peak rate on down direction requires to reach 1Gbps, and the peak rate on up direction requires then to need to reach 500Mbps.Simultaneously, the LTE-A system also requires to have good compatibility with the LTE system.
Based on improve peak rate, with LTE system compatible and the needs that make full use of frequency spectrum resource, the LTE-A system has introduced carrier aggregation (Carrier Aggregation, CA) technology.
Carrier aggregation technology be meant respectively comprise on the up-downlink direction in a sub-district a plurality of member carriers (Component Carrier, technical scheme CC), rather than LTE and before wireless communication system in have only the pattern of a cover carrier wave.
In the system of carrier aggregation, each member carrier can be continuous, also can be discontinuous.For with the LTE system compatible, the maximum bandwidth of each member carrier of LTE-A system is 20MHz, the bandwidth between each member carrier then can be identical, also can be different.
After in the LTE-A system, introducing carrier aggregation technology, because subscriber equipment (UserEquipment, UE) may be simultaneously operated on a plurality of member carriers, if these member carriers are the member carrier of network side according to cell management, so, from network side, just can see that this UE carries out with a plurality of sub-districts simultaneously alternately.
Owing to encrypt key and network attached storage (the Network AttachedStorage that uses in the UE connection procedure, NAS) needs of mobile management, the situation of the information of certain specific cell that links to each other with this UE may occur using, such specific cell just is called particular cell (special cell).
In the LTE system, also there is access mechanism at random, the reason of access mechanism mainly comprises following several at random:
Situation 1, from the state of RRC_IDLE, promptly insert under the state of Radio Resource free time, be also referred to as initial access (initial access).
Because of Radio Link Failure, and initiate to insert under the situation of RRC connection reconstruction in situation 2, the current system, this also is initial insert a kind of.
In situation 3, the handoff procedure, insert under the situation that need insert at random.
When situation 4, UE are in the RRC_CONNECTED state,, then insert if there is downlink data to arrive.
When situation 5, UE are in the RRC_CONNECTED state,, then insert if there is upstream data to arrive.
For having downlink data to arrive and switching two kinds of situations (being above-mentioned situation 3 and situation 4),, then can use non-competing access at random if special-purpose lead code (Preamble) is arranged in the current system.
In existing technical scheme, the schematic flow sheet of non-competing random access procedure mainly may further comprise the steps as shown in Figure 1:
Step S101, base station are used in non-competing special-purpose RA-PreambleIndex (the Random Access-Preamble Index that inserts at random to the UE branch, the random access lead code sign) and at random insert Physical Random Access Channel (the Physical Random Access CHannel that uses, PRACH) RA-PRACH-MaskIndex of resource (Random Access-PRACH Mask Index inserts PRACH sign numbering at random).
Arrive the non-competing random access procedure that causes for downlink data, use Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) carry these information, and for switching caused non-competing random access procedure, (handover command) carries these information by switching command.
Step S102, UE on the PRACH of appointment resource, send the dedicated preamble of appointment according to RA-PreambleIndex indicated among the step S101 and RA-PRACH-MaskIndex to the base station.
After step S103, base station receive the dedicated preamble of appointment, according to this dedicated preamble calculate the pairing up Timing Advance of this UE (Timing Advance, TA).
Step S104, base station send accidental access response to UE, comprise Timing Advance information in the accidental access response, the Timing Advance of the follow-up uplink of notice UE.
All insert the random access procedure that reason (being above-mentioned situation 1, situation 2 and situation 5) causes at random for other, then all can use competition to insert at random.
In existing technical scheme, the schematic flow sheet of competition random access procedure mainly may further comprise the steps as shown in Figure 2:
Step S201, UE select to insert preamble and PRACH resource at random, and utilize this PRACH resource to send the selected preamble that inserts at random to the base station.
Step S202, base station receive the preamble of access at random that UE sends, and calculate Timing Advance (TA), and send accidental access response to UE.
At least comprise this Timing Advance information in the accidental access response and at uplink authorization (Uplink grant, the UL grant) information of subsequent step.
Step S203, UE send uplink transmission data to the base station according to the UL grant information that receives on pairing UL grant resource.
Insert reason for different random, the content difference of the uplink transmission data that step S203 sent, such as, for initial access, what step S203 transmitted is that RRC connects the request of foundation.
Step S204, UE receive the competition of returning the base station and solve message.
UE solves message according to the competition that receives, and can judge whether access at random is successful.
In the process that realizes the embodiment of the invention, the inventor finds that there is following problem at least in prior art:
Still do not have in the LTE-A agreement at present multicarrier system how to insert at random and fail after associated description.
Summary of the invention
The embodiment of the invention provides accidental access method and the equipment in a kind of multicarrier system, be implemented in multicarrier system insert at random and fail after processing.
For achieving the above object, the embodiment of the invention provides the accidental access method in a kind of multicarrier system on the one hand, specifically may further comprise the steps:
When the terminal that works in a plurality of carrier waves simultaneously need be initiated random access procedure, described terminal was selected a carrier wave according to default first carrier selection strategy in a plurality of carrier waves that self works, initiate random access procedure to the base station;
When described terminal is passed through the selected carrier wave of described first carrier selection strategy after the random access procedure failure is initiated in the base station, described terminal is according to the second default carrier wave selection strategy, one or more carrier waves are selected in continuation in other carrier waves of working at self, initiate random access procedure to described base station;
Wherein, when described terminal judges reached default report condition, described terminal reported to the rrc layer of self correspondence and inserts the problem indication information at random.
Preferably, described terminal is selected a carrier wave according to default first carrier selection strategy in a plurality of carrier waves that self works, initiate random access procedure to the base station, is specially a kind of in the following situation:
Described terminal is selected a carrier wave at random in current all optional up-link carriers, initiate random access procedure to the base station;
Described terminal is selected a carrier wave at random in the included Link State of current all optional up-link carriers reaches the up-link carrier of preset state threshold value, initiate random access procedure to the base station;
Described terminal is selected a best carrier wave of Link State in current all optional up-link carriers, initiates random access procedure to the base station;
Described terminal is selected the pairing up-link carrier of particular cell Special Cell, initiates random access procedure to the base station.
Preferably, described current all optional up-link carriers specifically comprise:
All up-link carriers that described terminal is worked; Or,
Described terminal work all have the up-link carrier of random access resource configuration; Or,
The described terminal of permission by the network side configuration is initiated all up-link carriers of access at random; Or,
Do not reach the up-link carrier of default unelected condition in all up-link carriers that described terminal is worked; Or,
In all up-link carriers that described terminal is worked, be in the up-link carrier of state of activation; Or,
In all up-link carriers that described terminal is worked, be in state of activation, and do not reach the up-link carrier of default unelected condition.
Preferably, described default unelected condition is specially:
At the appointed time carried out in the scope at random inserting, and reached still access failure at random of maximum times.
Preferably, after described terminal was initiated described random access procedure failure, described terminal continued to select one or more carrier waves according to the second default carrier wave selection strategy in other carrier waves of working at self, initiate random access procedure to described base station, be specially a kind of in the following situation:
Described terminal is the one or more carrier waves of picked at random in remaining carrier set, initiate random access procedure to the base station;
Described terminal is selected a best carrier wave of Link State in remaining carrier set, initiate random access procedure to the base station;
Described terminal is selected one or more carrier waves in the up-link carrier with the failure of current initiation random access procedure is in the residue carrier wave of different coverings, initiate random access procedure to the base station;
Described terminal is selected one or more carrier waves in the up-link carrier with the failure of current initiation random access procedure has the carrier wave of different Timing Advance TA, initiate random access procedure to the base station.
Preferably, described terminal judges reaches default report condition, specifically comprises one or more of following situation:
Described terminal is initiated the frequency of failure of random access procedure in current all carrier waves of self being worked, reach the maximum frequency of failure of configuration respectively;
Described terminal can not successfully be initiated random access procedure to the base station by any one carrier wave in default time range;
Described terminal after the random access procedure failure is initiated in the base station, in default time range, can not successfully be initiated random access procedure to the base station by any one other carrier wave by the selected carrier wave of described first carrier selection strategy;
After described terminal retransmits preamble in each carrier wave total degree has reached default retransmission threshold value, still can not successfully initiate random access procedure to the base station;
Described terminal is passed through the selected carrier wave of described first carrier selection strategy after the random access procedure failure is initiated in described base station, after the total degree of re-transmission preamble has reached default retransmission threshold value in described second carrier wave, still can not successfully initiate random access procedure to described base station; Or,
Described terminal is initiated the random access procedure failure by the pairing carrier wave of described Special Cell to the base station;
Described terminal is initiated the random access procedure failure by the best carrier wave of Link State to the base station;
The number of carriers that described terminal is initiated the random access procedure trial reaches default number of carriers threshold value.
On the other hand, the embodiment of the invention also provides a kind of terminal, specifically comprises:
Module is set, is used to be provided with first carrier selection strategy, second carrier wave selection strategy and the report condition;
Access module at random, the terminal that works in a plurality of carrier waves simultaneously is used for when need be initiated random access procedure, according to the described set first carrier selection strategy of module that is provided with, in a plurality of carrier waves that self works, select a carrier wave, initiate random access procedure to the base station, maybe when passing through the selected carrier wave of described first carrier selection strategy after the random access procedure failure is initiated in the base station, according to the described second set carrier wave selection strategy of module that is provided with, one or more carrier waves are selected in continuation in other carrier waves of working in described terminal, initiate random access procedure to described base station;
Judge module is used to judge whether the state that described access module is at random initiated random access procedure when the described base station of forward direction reaches the described set report condition of module that is provided with;
Sending module is used for judging when the state of the described base station initiation of forward direction random access procedure reaches described report condition when described judge module, reports to the rrc layer of described terminal correspondence and inserts the problem indication information at random.
Preferably, the described set first carrier selection strategy of module that is provided with is specially a kind of in the following situation:
In current all optional up-link carriers, select a carrier wave at random, initiate random access procedure to the base station;
In the included Link State of current all optional up-link carriers reaches the up-link carrier of preset state threshold value, select a carrier wave at random, initiate random access procedure to the base station;
Select a best carrier wave of Link State in current all optional up-link carriers, initiate random access procedure to the base station;
Select the pairing up-link carrier of Special Cell, initiate random access procedure to the base station.
Preferably, described current all optional up-link carriers specifically comprise:
All up-link carriers that described terminal is worked; Or,
Do not reach the up-link carrier of default unelected condition in all up-link carriers that described terminal is worked; Or,
In all up-link carriers that described terminal is worked, be in the up-link carrier of state of activation; Or,
In all up-link carriers that described terminal is worked, be in state of activation, and do not reach the up-link carrier of default unelected condition.
Preferably, described default unelected condition is specially:
At the appointed time carried out in the scope at random inserting, and reached still access failure at random of maximum times.
Preferably, the described second set carrier wave selection strategy of module that is provided with is specially a kind of in the following situation:
The one or more carrier waves of picked at random in remaining carrier set are initiated random access procedure to the base station;
In remaining carrier set, select a best carrier wave of Link State, initiate random access procedure to the base station;
In the up-link carrier with the failure of current initiation random access procedure is in the residue carrier wave of different coverings, select one or more carrier waves, initiate random access procedure to the base station;
In the up-link carrier with the failure of current initiation random access procedure has the carrier wave of different TA, select one or more carrier waves, initiate random access procedure to the base station.
Preferably, described judge module judges that the state that described access module is at random initiated random access procedure when the described base station of forward direction reaches the described set report condition of module that is provided with, and specifically comprises one or more of following situation:
The described access module at random of described judge module judgement is initiated the frequency of failure of random access procedure in all carrier waves that current described terminal is worked, reach the maximum frequency of failure of configuration respectively;
Judge module judges that described access module at random can not successfully be initiated random access procedure to the base station by any one carrier wave in default time range;
The described access module at random of judge module judgement is passed through the selected carrier wave of described first carrier selection strategy after the random access procedure failure is initiated in the base station, in default time range, can not successfully initiate random access procedure to the base station by any one other carrier wave;
Judge module still can not successfully be initiated random access procedure to the base station after judging that described access module at random retransmits preamble in each carrier wave total degree has reached default retransmission threshold value;
The described access module at random of judge module judgement is initiated the random access procedure failure by the pairing carrier wave of described Special Cell to the base station;
The described access module at random of judge module judgement is initiated the random access procedure failure by the best carrier wave of Link State to the base station;
Judge module judges that the number of carriers that the described initiation of access module at random random access procedure is attempted reaches default number of carriers threshold value.
Compared with prior art, the embodiment of the invention has the following advantages:
By using the technical scheme that the embodiment of the invention proposed, clear and definite in mobile communication system because the introducing of multicarrier, in a plurality of up-link carriers, can initiate the handling process of random access procedure, thereby, can in multicarrier system, initiate to insert at random to handle.
Description of drawings
Fig. 1 is the schematic flow sheet of a kind of non-competing random access procedure of the prior art;
Fig. 2 is a kind of schematic flow sheet of competing random access procedure of the prior art;
Fig. 3 is the schematic flow sheet of the accidental access method in a kind of multicarrier system that the embodiment of the invention proposed;
The schematic flow sheet of the accidental access method in a kind of multicarrier system that Fig. 4 is proposed for the embodiment of the invention one;
The schematic flow sheet of the accidental access method in a kind of multicarrier system that Fig. 5 is proposed for the embodiment of the invention two;
The schematic flow sheet of the accidental access method in a kind of multicarrier system that Fig. 6 is proposed for the embodiment of the invention three;
The schematic flow sheet of the accidental access method in a kind of multicarrier system that Fig. 7 is proposed for the embodiment of the invention four;
The schematic flow sheet of the accidental access method in a kind of multicarrier system that Fig. 8 is proposed for the embodiment of the invention five;
The schematic flow sheet of the accidental access method in a kind of multicarrier system that Fig. 9 is proposed for the embodiment of the invention six;
The schematic flow sheet of the accidental access method in a kind of multicarrier system that Figure 10 is proposed for the embodiment of the invention seven;
Figure 11 is the structural representation of a kind of terminal that the embodiment of the invention proposed.
Embodiment
In order to solve problems of the prior art, the accidental access method in a kind of multicarrier system that the embodiment of the invention proposes, this method is applied to comprise in the system of a plurality of base stations and a MCE.
As shown in Figure 3, the schematic flow sheet for the accidental access method in a kind of multicarrier system of embodiment of the invention proposition specifically may further comprise the steps:
Step S301, when the terminal that works in a plurality of carrier waves simultaneously need be initiated random access procedure, terminal is selected a carrier wave according to default first carrier selection strategy in a plurality of carrier waves that self works, initiate random access procedure to the base station.
In concrete application scenarios, the realization flow of this step is specially a kind of in the following situation:
Terminal is selected a carrier wave at random in current all optional up-link carriers, initiate random access procedure to the base station;
Terminal is selected a carrier wave at random in the included Link State of current all optional up-link carriers reaches the up-link carrier of preset state threshold value, initiate random access procedure to the base station;
Terminal is selected a best carrier wave of Link State in current all optional up-link carriers, initiates random access procedure to the base station;
Terminal is selected the pairing up-link carrier of particular cell Special Cell, initiates random access procedure to the base station.
Wherein, current all optional up-link carriers specifically comprise:
All up-link carriers that terminal is worked; Or,
Terminal work all have the up-link carrier of random access resource configuration; Or,
Initiate all up-link carriers of access at random by the permission terminal of network side configuration; Or,
Do not reach the up-link carrier of default unelected condition in all up-link carriers that terminal is worked; Or,
In all up-link carriers that terminal is worked, be in the up-link carrier of state of activation; Or,
In all up-link carriers that terminal is worked, be in state of activation, and do not reach the up-link carrier of default unelected condition.
Need be pointed out that further that above-mentioned default unelected condition is specially:
At the appointed time carried out in the scope at random inserting, and reached still access failure at random of maximum times.
Whether step S302, terminal judges are passed through the selected carrier wave of first carrier selection strategy successful to base station initiation random access procedure.
If success inserts successfully flow performing subsequent operation afterwards at random according to existing;
If failure, execution in step S303, wherein, failure is meant that having reached maximum attempts still can not insert success at random.
Whether step S303, terminal judges reach default report condition.
If reach, execution in step S304 then;
If do not reach, execution in step S305 then.
In concrete application scenarios, terminal judges reaches default report condition, specifically comprises one or more of following situation:
Terminal is initiated the frequency of failure of random access procedure in current all carrier waves of self being worked, reach the maximum frequency of failure of configuration respectively;
Terminal can not successfully be initiated random access procedure to the base station by any one carrier wave in default time range;
Terminal after the random access procedure failure is initiated in the base station, in default time range, can not successfully be initiated random access procedure to the base station by any one other carrier wave by the selected carrier wave of first carrier selection strategy;
After terminal retransmits preamble in each carrier wave total degree has reached default retransmission threshold value, still can not successfully initiate random access procedure to the base station;
Terminal after the random access procedure failure is initiated in the base station, after the total degree of re-transmission preamble has reached default retransmission threshold value in second carrier wave, still can not successfully be initiated random access procedure to the base station by the selected carrier wave of described first carrier selection strategy; Or,
Terminal is initiated the random access procedure failure by the pairing carrier wave of Special Cell to the base station;
Terminal is initiated the random access procedure failure by the best carrier wave of Link State to the base station;
The number of carriers that terminal is initiated the random access procedure trial reaches default number of carriers threshold value.
Step S304, terminal report to self pairing rrc layer and insert the problem indication information at random.
Step S305, terminal continue to select one or more carrier waves in other carrier waves of working at self according to the second default carrier wave selection strategy, initiate random access procedure to the base station.
It needs to be noted; if above-mentioned report condition is to be set at promptly to report when inserting the problem indication information at random after default time range arrives; then in the process that this step is carried out; if arrive default time range; then direct rrc layer to terminal self correspondence reports and inserts the problem indication information at random; this is the flow process adjustment of carrying out according to concrete report condition, and such variation can't influence protection scope of the present invention.
In concrete application scenarios, the realization flow of this step is specially a kind of in the following situation:
Terminal is the one or more carrier waves of picked at random in remaining carrier set, initiate random access procedure to the base station;
Terminal is selected a best carrier wave of Link State in remaining carrier set, initiate random access procedure to the base station;
Terminal is selected one or more carrier waves in the up-link carrier with the failure of current initiation random access procedure is in the residue carrier wave of different coverings, initiate random access procedure to the base station;
Terminal is selected one or more carrier waves in the up-link carrier with the failure of current initiation random access procedure has the carrier wave of different Timing Advance TA, initiate random access procedure to the base station.
Whether step S306, terminal judges are passed through the selected carrier wave of the second carrier wave selection strategy successful to base station initiation random access procedure.
If success inserts successfully flow performing subsequent operation afterwards at random according to existing;
If failure, execution in step S303.
It is pointed out that said failure has a lot of levels here:
If carrier wave is attempted successively one by one, then on the carrier wave of each selection, reach the still not success of maximum attempts of configuration, be failure, select next the continuation to attempt again;
If initiate the access at random on a plurality of carrier waves simultaneously, dispose the maximum times that a plurality of carrier waves are attempted sum, then each failure of each carrier wave all need judge whether to reach report condition;
If disposed the trial timer, then need the real-time judge timer whether overtime, if overtime, then be failure.
Compared with prior art, the embodiment of the invention has the following advantages:
By using the technical scheme that the embodiment of the invention proposed, clear and definite in mobile communication system because the introducing of multicarrier, in a plurality of up-link carriers, can initiate the handling process of random access procedure, thereby, can in multicarrier system, initiate to insert at random to handle.
Below, further combined with concrete example, the technical scheme of the embodiment of the invention is described.
The embodiment of the invention provides the accidental access method in a kind of multicarrier system, need initiatively to initiate to compete under the situation about inserting at random at UE, in all available up-link carriers, choose a carrier wave according to certain rule and initiate the competition random access procedure according to the process of R8 to network side.
When the competition random access procedure of UE on a carrier wave reached maximum attempts and still fail, UE selected other carrier waves to initiate competition once more according to certain rule to insert at random.
And, according to pre-conditioned, reporting the indication of access problem at random to RRC, rrc layer is initiated subsequent treatment according to current state, as RRC connection reconstruction process.
Wherein, when UE needs active initiation competition to insert at random, select the principle of up-link carrier to be:
(1) in all optional up-link carriers, selects at random.
(2) its link meets some requirements and selects at random in the up-link carrier subclass of (for example, path loss is lower than the threshold value of configuration and/or the threshold value that received signal power is higher than configuration) in all optional up-link carriers.
(3) all do not satisfy specific link condition (for example, path loss is lower than the threshold value of configuration and/or the threshold value that received signal power is higher than configuration) when all optional up-link carriers, then select the best up-link carrier of link condition in all up-link carriers.
(4) up-link carrier of selection Special cell correspondence.
(5) select in all optional up-link carriers that link condition is best (need take all factors into consideration path loss, expectation received power, UE maximum transmission power and the various power headroom parameters etc. of configuration send that the highest carrier wave of the probability of success according to existing measurement and selection of configuration in a word) up-link carrier.
Wherein, optionally the up-link carrier set can be:
The set that configuration forms for all up-link carriers of UE; Or,
The set that the up-link carrier that configuration wherein activates for all up-link carriers of UE is formed; Or,
In above-mentioned set, remove the set of in time T 1 scope, having carried out inserting at random and reach behind the up-link carrier that maximum times still fails.
UE initiates random access procedure at a certain up-link carrier and reaches maximum times yet after the success, chooses the principle that new up-link carrier initiates to insert at random again can be:
(1) up-link carrier of picked at random in remaining carrier set.
(2) in remaining carrier set, select a best up-link carrier of link condition.
(3) on all residue up-link carriers, select to initiate simultaneously to insert at random more than a up-link carrier.
(4) with each carrier set of the different coverings of this up-link carrier in all select a carrier wave to initiate simultaneously to insert at random.
(5) in each carrier set different, all select a carrier wave to initiate simultaneously to insert at random with this up-link carrier TA set.
The MAC course rrc layer of UE reports the trigger condition of the indication of access problem at random to comprise:
UE has attempted the up-link carrier of all configurations and has initiated to insert at random, all reaches the still not success of maximum times of configuration.
UE can't initiate successful access at random at any one up-link carrier in time T 2 scopes.
UE is at first up-link carrier at random behind the access failure, in time T 3 scopes, can't initiate successful access at random at any one remaining up-link carrier.
UE still can't insert success at random after the total degree of each up-link carrier re-transmission preamble has reached thresholding N1.
UE initiates access failure at random at the up-link carrier of special cell correspondence.
UE initiates access failure at random at the best up-link carrier of link condition.
The CC/CC group quantity that UE attempts surpasses thresholding.
Below by specific embodiment technical scheme of the present invention is described:
As shown in Figure 4, the schematic flow sheet of the accidental access method in a kind of multicarrier system that is proposed for the embodiment of the invention one, UE is when needs are initiated competition and inserted at random, and its process and subsequent treatment may further comprise the steps:
Step S401, UE select the up-link carrier CC1 of special cell correspondence, according to the similar process of R8, send Msg1, and wait for reception Msg2 and carry out subsequent process.
Wherein, Msg1 is specially the message that comprises special-purpose RA-PreambleIndex and insert the information such as RA-PRACH-MaskIndex of the PRACH resource of using at random; Msg2 is specially accidental access response message; for convenience of description; in each follow-up embodiment, also adopt identical abbreviation; repeated description no longer in subsequent embodiment, the variation of concrete appellation does not influence protection scope of the present invention.
Step S402, when UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If the number of times that step S403 UE attempts inserting at random at the up-link carrier CC1 of special cell correspondence has surpassed the maximum attempts of configuration, then report the indication of access problem at random to rrc layer.
As shown in Figure 5, the schematic flow sheet of the accidental access method in a kind of multicarrier system that is proposed for the embodiment of the invention two, UE is when needs are initiated competition and inserted at random, and its process and subsequent treatment may further comprise the steps:
Step S501, UE be up-link carrier CC1 of picked at random in all available up-link carriers, according to the similar process of R8, sends Msg1, and waits for reception Msg2 and carry out subsequent process.
Step S502, when UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If the number of times that step S503 UE attempts inserting at random at current up-link carrier CC1 has surpassed the maximum attempts of configuration, then UE chooses a carrier wave CC2 that relative channel condition is best again in the available up-link carrier set of residue, initiate random access procedure, the random access procedure on the CC1 can stop also can to continue.
Step S504, when UE after CC2 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC2 according to existing flow process.
If the number of times that step S505 UE attempts inserting at random at up-link carrier CC2 also surpasses the maximum attempts of configuration, then report the indication of access problem at random to rrc layer.
As shown in Figure 6, the schematic flow sheet of the accidental access method in a kind of multicarrier system that is proposed for the embodiment of the invention three, UE is when needs are initiated competition and inserted at random, and its process and subsequent treatment may further comprise the steps:
Step S601, UE be up-link carrier CC1 of picked at random in all available up-link carriers, according to the similar process of R8, sends Msg1, and waits for reception Msg2 and carry out subsequent process.
Step S602, when UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If the number of times that step S603 UE attempts inserting at random at current up-link carrier CC1 has surpassed the maximum attempts of configuration, then UE covers in each carrier subset of different (perhaps pairing TA collection differences) with CC1 in the set of the available up-link carrier of residue and selects a up-link carrier respectively, for example CC2 and CC3, initiate random access procedure, the random access procedure on the CC1 can stop also can to continue.
Step S604, when UE after CC2 (CC3) random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC2 (CC3) according to existing flow process.
If the number of times that step S605 UE attempts inserting at random at up-link carrier CC2 and CC3 also surpasses the maximum attempts of configuration, then report the indication of access problem at random to rrc layer.
As shown in Figure 7, the schematic flow sheet of the accidental access method in a kind of multicarrier system that is proposed for the embodiment of the invention four, UE is when needs are initiated competition and inserted at random, and its process and subsequent treatment may further comprise the steps:
Step S701, UE satisfy up-link carrier CC1 of picked at random in the up-link carrier (being lower than the threshold value of configuration and/or threshold value that received signal power is higher than configuration etc. as path loss) of certain condition at all, if the available up-link carrier of UE does not all satisfy this condition, the best up-link carrier CC1 of selective channel condition then, according to the similar process of R8, send Msg1, and wait for reception Msg2 and carry out subsequent process, start timer simultaneously, be designated as T2.
Step S702, when UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If the number of times that step S703 UE attempts inserting at random at current up-link carrier CC1 has surpassed the maximum attempts of configuration, then UE chooses whole up-link carriers in the available up-link carrier set of residue, for example CC2 and CC3, initiate random access procedure, the random access procedure on the CC1 can stop also can to continue.
Step S704, when UE after CC2 (CC3) random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC2 (CC3) according to existing flow process.
If it is overtime that step S705 works as T2, UE at all up-link carrier CC1, CC2 and CC3 all less than the access at random of succeeing, perhaps the UE number of times of attempting inserting at random at up-link carrier CC2 and CC3 also surpasses the maximum attempts of configuration, then reports the indication of access problem at random to rrc layer.
As shown in Figure 8, the schematic flow sheet of the accidental access method in a kind of multicarrier system that is proposed for the embodiment of the invention five, UE is when needs are initiated competition and inserted at random, and its process and subsequent treatment may further comprise the steps:
Step S801, UE be up-link carrier CC1 of picked at random in all available up-link carriers, according to the similar process of R8, sends Msg1, and waits for reception Msg2 and carry out subsequent process.
Step S802, when UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If the number of times that step S803 UE attempts inserting at random at current up-link carrier CC1 has surpassed the maximum attempts of configuration, then UE chooses whole up-link carriers in the available up-link carrier set of residue, for example CC2 and CC3, initiate random access procedure, random access procedure on the CC1 can stop also can to continue, start timer simultaneously, be designated as T3.
Step S804, when UE after CC2 (CC3) random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC2 (CC3) according to existing flow process.
If it is overtime that step S805 works as T3, UE at all up-link carrier CC1, CC2 and CC3 all less than the access at random of succeeing, perhaps the UE number of times of attempting inserting at random at up-link carrier CC2 and CC3 also surpasses the maximum attempts of configuration, then reports the indication of access problem at random to rrc layer.
As shown in Figure 9, the schematic flow sheet of the accidental access method in a kind of multicarrier system that is proposed for the embodiment of the invention six, UE is when needs are initiated competition and inserted at random, and its process and subsequent treatment may further comprise the steps:
Step S901, UE be up-link carrier CC1 of picked at random in all available up-link carriers, according to the similar process of R8, sends Msg1, and waits for reception Msg2 and carry out subsequent process.
Step S902, when UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If the number of times that step S903 UE attempts inserting at random at current up-link carrier CC1 has surpassed the maximum attempts of configuration, then UE chooses whole up-link carriers in the available up-link carrier set of residue, for example CC2 and CC3, initiate random access procedure, random access procedure on the CC1 can stop also can to continue, and starts Counter simultaneously and is recorded in number of attempt on CC2 and the CC3.
Step S904, when UE after CC2 (CC3) random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC2 (CC3) according to existing flow process, no matter CC2 still is CC3 retransmits, the Counter value all adds one.
When if step S905 surpasses the thresholding N1 of configuration when the Counter value, UE then reports access problem at random to indicate to rrc layer in the access at random that all up-link carrier CC1, CC2 and CC3 all do not succeed.
As shown in figure 10, the schematic flow sheet of the accidental access method in a kind of multicarrier system that is proposed for the embodiment of the invention seven, UE is when needs are initiated competition and inserted at random, and its process and subsequent treatment may further comprise the steps:
Step S1001, UE be up-link carrier CC1 of picked at random in all available up-link carriers, according to the similar process of R8, sends Msg1, and waits for reception Msg2 and carry out subsequent process.
Step S1002, when UE after CC1 random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC1 according to existing flow process.
If the number of times that step S1003 UE attempts inserting at random at current up-link carrier CC1 has surpassed the maximum attempts of configuration, then UE chooses whole up-link carriers in the available up-link carrier set of residue, for example CC2 and CC3, initiate random access procedure, the random access procedure on the CC1 can stop also can to continue.
Step S1004, when UE after CC2 (CC3) random access procedure failure, initiate Preamble retransmission processes on this carrier wave CC2 (CC3) according to existing flow process.
If the number of times that step S1005 UE attempts inserting at random at up-link carrier CC2 and CC3 also surpasses the maximum attempts of configuration half (perhaps with common another the different configured threshold value of maximum attempts that inserts at random), then report the indication of access problem at random to rrc layer.
Compared with prior art, the embodiment of the invention has the following advantages:
By using the technical scheme that the embodiment of the invention proposed, clear and definite in mobile communication system because the introducing of multicarrier, in a plurality of up-link carriers, can initiate the handling process of random access procedure, thereby, can in multicarrier system, initiate to insert at random to handle.
In order to realize the technical scheme of the embodiment of the invention, the embodiment of the invention has also proposed a kind of terminal, and its structural representation specifically comprises as shown in figure 11:
Module 1101 is set, is used to be provided with first carrier selection strategy, second carrier wave selection strategy and the report condition.
Preferably, the set first carrier selection strategy of module 1101 is set, is specially a kind of in the following situation:
In current all optional up-link carriers, select a carrier wave at random, initiate random access procedure to the base station.
In the included Link State of current all optional up-link carriers reaches the up-link carrier of preset state threshold value, select a carrier wave at random, initiate random access procedure to the base station.
Select a best carrier wave of Link State in current all optional up-link carriers, initiate random access procedure to the base station.
Select the pairing up-link carrier of Special Cell, initiate random access procedure to the base station.
Preferably, current all optional up-link carriers specifically comprise:
All up-link carriers that terminal is worked; Or,
Terminal work all have the up-link carrier of random access resource configuration; Or,
Initiate all up-link carriers of access at random by the permission terminal of network side configuration; Or,
Do not reach the up-link carrier of default unelected condition in all up-link carriers that terminal is worked; Or,
In all up-link carriers that terminal is worked, be in the up-link carrier of state of activation; Or,
In all up-link carriers that terminal is worked, be in state of activation, and do not reach the up-link carrier of default unelected condition.
Preferably, default unelected condition is specially:
At the appointed time carried out in the scope at random inserting, and reached still access failure at random of maximum times.
Preferably, the second set carrier wave selection strategy of module 1101 is set, is specially a kind of in the following situation:
The one or more carrier waves of picked at random in remaining carrier set are initiated random access procedure to the base station.
In remaining carrier set, select a best carrier wave of Link State, initiate random access procedure to the base station.
In the up-link carrier with the failure of current initiation random access procedure is in the residue carrier wave of different coverings, select one or more carrier waves, initiate random access procedure to the base station.
In the up-link carrier with the failure of current initiation random access procedure has the carrier wave of different TA, select one or more carrier waves, initiate random access procedure to the base station.
Preferably, judge module 1103 is judged that state that access module at random 1102 is initiated random access procedure when the forward direction base station reaches the set report condition of module 1101 is set, specifically comprises one or more of following situation:
Sending module 1104 is used for judging when the state of forward direction base station initiation random access procedure reaches report condition when judge module 1103, reports to the rrc layer of terminal self correspondence and inserts the problem indication information at random.
Compared with prior art, the embodiment of the invention has the following advantages:
By using the technical scheme that the embodiment of the invention proposed, clear and definite in mobile communication system because the introducing of multicarrier, in a plurality of up-link carriers, can initiate the handling process of random access procedure, thereby, can in multicarrier system, initiate to insert at random to handle.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, the technical scheme of the embodiment of the invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) each implements the described method of scene to carry out the embodiment of the invention.
It will be appreciated by those skilled in the art that accompanying drawing is a preferred schematic diagram of implementing scene, module in the accompanying drawing or flow process might not be that the enforcement embodiment of the invention is necessary.
It will be appreciated by those skilled in the art that the module in the device of implementing in the scene can be distributed in the device of implementing scene according to implementing scene description, also can carry out respective change and be arranged in the one or more devices that are different from this enforcement scene.The module of above-mentioned enforcement scene can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of implementing scene just to description.
More than disclosed only be the several concrete enforcement scene of the embodiment of the invention, still, the embodiment of the invention is not limited thereto, any those skilled in the art can think variation all should fall into the protection range of the embodiment of the invention.
Claims (12)
1. the accidental access method in the multicarrier system is characterized in that, specifically may further comprise the steps:
When the terminal that works in a plurality of carrier waves simultaneously need be initiated random access procedure, described terminal was selected a carrier wave according to default first carrier selection strategy in a plurality of carrier waves that self works, initiate random access procedure to the base station;
When described terminal is passed through the selected carrier wave of described first carrier selection strategy after the random access procedure failure is initiated in the base station, described terminal is according to the second default carrier wave selection strategy, one or more carrier waves are selected in continuation in other carrier waves that self works, initiate random access procedure to described base station;
Wherein, when described terminal judges reached default report condition, described terminal reported to self radio resource control rrc layer and inserts the problem indication information at random.
2. the method for claim 1 is characterized in that, described terminal is selected a carrier wave according to default first carrier selection strategy in a plurality of carrier waves that self works, initiate random access procedure to the base station, is specially a kind of in the following situation:
Described terminal is selected a carrier wave at random in current all optional up-link carriers, initiate random access procedure to the base station;
Described terminal is selected a carrier wave at random in the included Link State of current all optional up-link carriers reaches the up-link carrier of preset state threshold value, initiate random access procedure to the base station;
Described terminal is selected a best carrier wave of Link State in current all optional up-link carriers, initiates random access procedure to the base station;
Described terminal is selected the pairing up-link carrier of particular cell Special Cell, initiates random access procedure to the base station.
3. method as claimed in claim 2 is characterized in that, described current all optional up-link carriers specifically comprise:
All up-link carriers that described terminal is worked; Or,
Described terminal work all have the up-link carrier of random access resource configuration; Or,
The described terminal of permission by the network side configuration is initiated all up-link carriers of access at random; Or,
Do not reach the up-link carrier of default unelected condition in all up-link carriers that described terminal is worked; Or,
In all up-link carriers that described terminal is worked, be in the up-link carrier of state of activation; Or,
In all up-link carriers that described terminal is worked, be in state of activation, and do not reach the up-link carrier of default unelected condition.
4. method as claimed in claim 3 is characterized in that, described default unelected condition is specially:
At the appointed time carried out in the scope at random inserting, and reached still access failure at random of maximum times.
5. the method for claim 1, it is characterized in that, after described terminal is initiated described random access procedure failure, described terminal is according to the second default carrier wave selection strategy, one or more carrier waves are selected in continuation in other carrier waves of working at self, initiate random access procedure to described base station, be specially a kind of in the following situation:
Described terminal is the one or more carrier waves of picked at random in remaining carrier set, initiate random access procedure to the base station;
Described terminal is selected a best carrier wave of Link State in remaining carrier set, initiate random access procedure to the base station;
Described terminal is selected one or more carrier waves in the up-link carrier with the failure of current initiation random access procedure is in the residue carrier wave of different coverings, initiate random access procedure to the base station;
Described terminal is selected one or more carrier waves in the up-link carrier with the failure of current initiation random access procedure has the carrier wave of different Timing Advance TA, initiate random access procedure to the base station.
6. the method for claim 1 is characterized in that, described terminal judges reaches default report condition, specifically comprises one or more of following situation:
Described terminal is initiated the frequency of failure of random access procedure in current all carrier waves of self being worked, reach the maximum frequency of failure of configuration respectively;
Described terminal can not successfully be initiated random access procedure to the base station by any one carrier wave in default time range;
Described terminal after the random access procedure failure is initiated in the base station, in default time range, can not successfully be initiated random access procedure to the base station by any one other carrier wave by the selected carrier wave of described first carrier selection strategy;
After described terminal retransmits preamble in each carrier wave total degree has reached default retransmission threshold value, still can not successfully initiate random access procedure to the base station;
Described terminal is passed through the selected carrier wave of described first carrier selection strategy after the random access procedure failure is initiated in described base station, after the total degree of re-transmission preamble has reached default retransmission threshold value in described second carrier wave, still can not successfully initiate random access procedure to described base station; Or,
Described terminal is initiated the random access procedure failure by the pairing carrier wave of described Special Cell to the base station;
Described terminal is initiated the random access procedure failure by the best carrier wave of Link State to the base station;
The number of carriers that described terminal is initiated the random access procedure trial reaches default number of carriers threshold value.
7. a terminal is characterized in that, specifically comprises:
Module is set, is used to be provided with first carrier selection strategy, second carrier wave selection strategy and the report condition;
Access module at random, the terminal that works in a plurality of carrier waves simultaneously is used for when need be initiated random access procedure, according to the described set first carrier selection strategy of module that is provided with, in a plurality of carrier waves that self works, select a carrier wave, initiate random access procedure to the base station, maybe when passing through the selected carrier wave of described first carrier selection strategy after the random access procedure failure is initiated in the base station, according to the described second set carrier wave selection strategy of module that is provided with, one or more carrier waves are selected in continuation in other carrier waves of working in described terminal, initiate random access procedure to described base station;
Judge module is used to judge whether the state that described access module is at random initiated random access procedure when the described base station of forward direction reaches the described set report condition of module that is provided with;
Sending module is used for judging when the state of the described base station initiation of forward direction random access procedure reaches described report condition when described judge module, reports to self rrc layer and inserts the problem indication information at random.
8. terminal as claimed in claim 7 is characterized in that, the described set first carrier selection strategy of module that is provided with is specially a kind of in the following situation:
In current all optional up-link carriers, select a carrier wave at random, initiate random access procedure to the base station;
In the included Link State of current all optional up-link carriers reaches the up-link carrier of preset state threshold value, select a carrier wave at random, initiate random access procedure to the base station;
Select a best carrier wave of Link State in current all optional up-link carriers, initiate random access procedure to the base station;
Select the pairing up-link carrier of Special Cell, initiate random access procedure to the base station.
9. terminal as claimed in claim 8 is characterized in that, described current all optional up-link carriers specifically comprise:
All up-link carriers that described terminal is worked; Or,
Described terminal work all have the up-link carrier of random access resource configuration; Or,
The described terminal of permission by the network side configuration is initiated all up-link carriers of access at random; Or,
Do not reach the up-link carrier of default unelected condition in all up-link carriers that described terminal is worked; Or,
In all up-link carriers that described terminal is worked, be in the up-link carrier of state of activation; Or,
In all up-link carriers that described terminal is worked, be in state of activation, and do not reach the up-link carrier of default unelected condition.
10. terminal as claimed in claim 9 is characterized in that, described default unelected condition is specially:
At the appointed time carried out in the scope at random inserting, and reached still access failure at random of maximum times.
11. terminal as claimed in claim 7 is characterized in that, the described second set carrier wave selection strategy of module that is provided with is specially a kind of in the following situation:
The one or more carrier waves of picked at random in remaining carrier set are initiated random access procedure to the base station;
In remaining carrier set, select a best carrier wave of Link State, initiate random access procedure to the base station;
In the up-link carrier with the failure of current initiation random access procedure is in the residue carrier wave of different coverings, select one or more carrier waves, initiate random access procedure to the base station;
In the up-link carrier with the failure of current initiation random access procedure has the carrier wave of different TA, select one or more carrier waves, initiate random access procedure to the base station.
12. terminal as claimed in claim 7, it is characterized in that, described judge module judges that the state that described access module is at random initiated random access procedure when the described base station of forward direction reaches the described set report condition of module that is provided with, and specifically comprises one or more of following situation:
The described access module at random of described judge module judgement is initiated the frequency of failure of random access procedure in all carrier waves that current described terminal is worked, reach the maximum frequency of failure of configuration respectively;
Described judge module judges that described access module at random can not successfully be initiated random access procedure to the base station by any one carrier wave in default time range;
The described access module at random of described judge module judgement is passed through the selected carrier wave of described first carrier selection strategy after the random access procedure failure is initiated in the base station, in default time range, can not successfully initiate random access procedure to the base station by any one other carrier wave;
Described judge module still can not successfully be initiated random access procedure to the base station after judging that described access module at random retransmits preamble in each carrier wave total degree has reached default retransmission threshold value;
Described judge module is judged by the selected carrier wave of described first carrier selection strategy after the random access procedure failure is initiated in described base station, after the total degree of re-transmission preamble has reached default retransmission threshold value in described second carrier wave, still can not successfully initiate random access procedure to described base station; Or,
The described access module at random of described judge module judgement is initiated the random access procedure failure by the pairing carrier wave of described Special Cell to the base station;
The described access module at random of described judge module judgement is initiated the random access procedure failure by the best carrier wave of Link State to the base station;
Described judge module judges that the number of carriers that the described initiation of access module at random random access procedure is attempted reaches default number of carriers threshold value.
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