CN102917469A - Auxiliary service cell access method and system, network side element and user equipment - Google Patents
Auxiliary service cell access method and system, network side element and user equipment Download PDFInfo
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- CN102917469A CN102917469A CN2011102184311A CN201110218431A CN102917469A CN 102917469 A CN102917469 A CN 102917469A CN 2011102184311 A CN2011102184311 A CN 2011102184311A CN 201110218431 A CN201110218431 A CN 201110218431A CN 102917469 A CN102917469 A CN 102917469A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/008—Transmission of channel access control information with additional processing of random access related information at receiving side
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Abstract
The invention discloses an auxiliary service cell access method which comprises the steps as follows: user equipment (UE) transmits random access preamble or uplink data to a network side through an auxiliary service cell when the uplink authorization is notified by the network side; the network side calculates the time alignment (TA) according to the received access preamble or uplink data and feeds back the time alignment to the user equipment; the user equipment receives and transmits the data in the auxiliary service cell after acquiring the time alignment. The invention also discloses a system for achieving the auxiliary service cell access method, a network side element and the user equipment. With the adoption of the technical scheme of the invention, the user equipment (UE) helps to shorten the time for accessing into the auxiliary service cell, so as to provide high speed business service for the user equipment (UE) as soon as possible. According to the invention, the Scell of the user equipment (UE) can be accessed more rapidly, and the user equipment can be supplied with the Scell access as soon as possible when the business load of the user equipment is heavier.
Description
Technical field
The present invention relates to the auxiliary serving cell access technology, relate in particular to a kind of method and system, network side network element, subscriber equipment of efficient auxiliary serving cell access.
Background technology
In radio honeycomb communication system, the terminal that random access procedure (Random Access Procedure) is used for idle condition (RRC_IDLE) (or is called subscriber equipment (UE, User Equipment)) initial access network, or the terminal of connection status (RRC_CONNECTED) and network carry out uplink synchronous (Uplink synchronization) and Gains resources distributes, to carry out subsequent data communications.
At third generation partnership project (3GPP, Third Generation Partnership Project) Long Term Evolution (LTE, Long Term Evolution) universal land radio access web (E-UTRAN of the evolution of system, Evolved Universal Terrestrial Radio Access Network) in, below six kinds of events can trigger the random access procedure of UE: (1) idle condition initially accesses; (2) radio resource control connection reestablishment process (RRC Connection Re-establishment procedure); (3) switch (HO, Handover); (4) RRC connection status downlink data arrives needs random access procedure, for example when the uplink synchronous state is " asynchronous "; (5) RRC connection status upstream data arrives needs random access procedure, for example work as the uplink synchronous state for " asynchronous " or do not have available Physical Uplink Control Channel (PUCCH, Physical Uplink Control Channel) resource sends dispatch request (SR, Schedule Request); (6) the RRC connection status needs random access procedure for the location purpose, and for example the UE location needs timing advance (Timing Advance).Random access procedure has two kinds of different forms: based on (Contention Based) (being applicable to above-mentioned the first five kind event) of conflict; Non-(Non-Contention Based) (being applicable to above-mentioned (3), (4), (6) event) based on conflict.After the random access procedure success, can carry out normal downlink or uplink transmission.
Random access procedure can be by the media access control layer (MAC of Physical Downlink Control Channel signaling (PDCCH order) or UE, Medium Access Control) initiates, alternatively, PDCCH order or Radio Resource control (RRC, Radio Resource Control) signaling can be distributed special random access preamble (Random Access Preamble) for UE, and then random access procedure is non-mode based on conflict; Otherwise UE need to select random access guiding, and then random access procedure is the mode based on conflict.UE selection random access resource comprises the time-frequency domain resources of selection random access guiding and Physical Random Access Channel (PRACH, Physical Random Access Channel) etc.For the random access procedure of non-conflict, the solution process of not conflicting.Fig. 1 is existing random access procedure schematic diagram, as shown in Figure 1, based on the conflict (Contention based) random access procedure mainly may further comprise the steps:
Step 101, UE sends random access guiding (Random Access Preamble) up by Random Access Channel (RACH, Random Access CHannel); UE sends configuration in system message broadcasting on opportunity of random access guiding, main configuration is the frequency-domain and time-domain resource, wherein frequency domain configuration is prach-FreqOffset (frequency shift (FS) of PRACH), and what time domain disposed is prach-ConfigIndex (which subframe on upper which frame of PRACH can be sent out random access guiding).
Step 102, the media access control layer of base station (eNB) (MAC, Medium Access Control) generates accidental access response message and sends to UE at DSCH Downlink Shared Channel (DL-SCH, Downlink-Shared Channel); At least comprise random access guiding sign (RAPID in this accidental access response message, Random Access Preamble IDentifier), the time is adjusted (TA, Time Alignment) information, initial uplink mandate (UL Grant, Uplink Grant) and interim residential quarter-Radio Network Temporary Identifier (Temporary C-RNTI); This accidental access response message passes through at Physical Downlink Control Channel (PDCCH, Phisical Downlink Control CHannel) the at random access-Radio Network Temporary Identifier on (RA-RNTI, Random Access-Radio Network Temporary Identifier) is indicated;
Step 103, UE is in the upper first transmission that is scheduled (Scheduled Transmission) message that sends of up shared transmission channel (UL-SCH, Uplink-Shared Channel); The content of this message transfer that is scheduled comprises at least residential quarter-Radio Network Temporary Identifier (C-RNTI), media access control unit (MAC Control Element) or comprises that conflict solves the public control logic channel Service Data Unit (CCCH SDU) of sign (Contention Resolution Identity); Mixed automatic retransfer request (HARQ, Hybrid Automatic Retransmission reQuest) is supported in the transmission of this message transfer that is scheduled;
Step 104, the base station sends conflict at DL-SCH and solves message (Contention Resolution); This conflict solves message and indicates by the C-RNTI on the PDCCH or interim C-RNTI, can comprise that conflict solves sign; HARQ is supported in the transmission of this message.
Above-mentioned steps 103 and step 104 are used for managing conflict.In six events of the random access procedure of above-mentioned triggering UE, wherein (4) RRC connection status downlink data arrives needs random access procedure, (5) RRC connection status upstream data arrives needs random access procedure, can trigger Scell and carry out random access procedure, still not get rid of to trigger when other Event triggered Scell execution random access procedure such as Scell activate and carry out random access procedure.
For higher data rate is provided to the mobile subscriber, senior Long Term Evolution (LTE-A, Long Term Evolution Advance) system has proposed carrier aggregation technology (CA, Carrier Aggregation), its objective is as the UE with respective capabilities provides larger broadband data transmission, improve the peak rate of UE.In the LTE system, the maximum downstream transmission bandwidth of system's support is 20MHz, carrier aggregation is with two or more component carrier (CC, Component Carriers) polymerization gets up to support greater than 20MHz, maximum is no more than the transmission bandwidth of 100MHz, and the sum configuration of initial stage UL CC is less than or equal to the sum configuration of DL CC.LTE-A UE with carrier aggregation capacity, transceiving data on a plurality of component carriers simultaneously, the UE that below relates to refers to this type of UE except specifying.In the LTE-A system, UE can pass through a plurality of component carriers (such as CC1 after entering connected state simultaneously, CC2) communicate with source base station, the base station can or be decided to be approximately UE according to agreement by explicit configuration and specify a principal component carrier wave (PCC, Primary Component Carrier), other component carrier is called auxiliary component carrier (SCC, Secondary Component Carrier), Serving cell on PCC is called main Serving cell (Pcell, Primary Cell), Serving cell on SCC is called auxiliary serving cell (Scell, Secondary Cell).Auxiliary serving cell is the base station configuration after UE enters connected state.Generally speaking, certain Serving cell all is that symmetrical uplink and downlink (Scell can a configurating downlink) are arranged, in system information block SIB2, explicitly point out, interference for fear of control channel, introduced the concept of striding carrier dispatching, namely in the more serious situation of the PDCCH interference ratio of certain Scell, the PDCCH of this Scell does not just enable, but dispatch the PDSCH of this Scell by the another one Serving cell, the another one Serving cell here can pass through the RRC signal deployment.A C-RNTI is only distributed for UE in the base station, and namely the C-RNTI of each Serving cell is identical.
According to Rel10, in the carrier aggregation initial stage, the number of Scell is fewer as only have 1, and also limited being made as not supporting up RRH and repeater of scene, therefore only exist a TA, UE only need to initiate uplink synchronous at Pcell and get final product, and on Scell, can not initiate.Follow-up phase, because the lifting of Scell data volume, the number of Scell can increase as being increased to 4, and scene also can be relaxed as supporting up RRH and repeater, and a TA can not deal with problems this moment, therefore can introduce a plurality of TA.At this moment, also can initiate uplink synchronous on the Scell, and just carry out random access procedure after Scell activates, Scell must just can carry out normal upstream data transmitting-receiving after uplink synchronous is finished.What carry out is the random access procedure of non-conflict if Scell is upper, then the time shorter, if what carry out is the random access procedure of conflict, the time will be long.Experience in order to improve the user, shorten the random access procedure of conflict, it is necessary perhaps accelerating Scell transmission upstream data.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and system, network side network element, subscriber equipment of auxiliary serving cell access, can make Scell realize fast access when needs use Scell.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method of auxiliary serving cell access comprises:
User equipment (UE) is at the transmission upstream data of network side notice or send upstream data or random access guiding by auxiliary serving cell to described network side the opportunity of random access guiding;
Described UE finishes the access of described auxiliary serving cell after receiving the time adjustment TA of network side feedback.
Preferably, described TA is that described network side calculates rear feedback according to random access guiding or the described upstream data that described UE sends.
Preferably, be that described network side is that random access guiding the earliest or the upstream data that described UE determines sends opportunity the opportunity of described transmission upstream data or random access guiding.
Preferably, the opportunity of described transmission upstream data or random access guiding be satisfy in present frame or the next frame described transmission upstream data or random access guiding opportunity condition subframe.
Preferably, described method also comprises:
Described UE receive that described network side sends together to the notice on opportunity of described transmission upstream data or random access guiding with to the notice of the activation command of described auxiliary serving cell; Perhaps, described UE receives the notice to opportunity of described transmission upstream data or random access guiding of described network side transmission after sending the activation command of described auxiliary serving cell.
Preferably, described method also comprises:
UE determines that auxiliary serving cell need adopt different TA from main Serving cell;
Perhaps, described UE receives the notice that described auxiliary serving cell that described network side sends and main Serving cell need adopt different TA.
Preferably, described method also comprises:
Described UE notifies described network side need to activate the TA that described auxiliary serving cell maybe needs to obtain described auxiliary serving cell by described main Serving cell.
Preferably, described network side is the base station.
A kind of method of auxiliary serving cell access comprises:
Network side notice UE sends the opportunity of upstream data or random access guiding;
Described network side receive described UE by auxiliary serving cell behind the upstream data that sends or random access guiding, calculate TA and also feed back to described UE, make described UE be linked into described auxiliary serving cell.
Preferably, be that described network side is that random access guiding the earliest or the upstream data that described UE determines sends opportunity the opportunity of described transmission upstream data or random access guiding.
Preferably, described method also comprises:
Described network side sends to the notice on opportunity of described transmission upstream data or random access guiding with to the notice of the activation command of described auxiliary serving cell together to described UE; Perhaps, described network side after sending the activation command of described auxiliary serving cell to the notice of described UE transmission to the opportunity of described transmission upstream data or random access guiding.
Preferably, described method also comprises:
Described network side notifies the described auxiliary serving cell of described UE need adopt different TA from main Serving cell.
A kind of system of auxiliary serving cell access comprises UE and network side, wherein,
Network side is used for calculating TA according to the random access guiding that receives or upstream data, and sends to described UE; And notify described UE to send the opportunity of upstream data or random access guiding;
UE is used for sending random access guiding or upstream data by auxiliary serving cell to described network side on the opportunity of described transmission upstream data or random access guiding; And, receive described TA after, finish the access of described auxiliary serving cell.
Preferably, be that described network side is that random access guiding the earliest or the upstream data that described UE determines sends opportunity the opportunity of described transmission upstream data or random access guiding.
Preferably, described uplink authorization be opportunity satisfy in present frame or the next frame described transmission upstream data or random access guiding opportunity condition subframe.
Preferably, described network side is further used for, and sends together to the notice on opportunity of described transmission upstream data or random access guiding with to the notice of the activation command of described auxiliary serving cell to described UE;
Perhaps, after to the notice of the activation command of described auxiliary serving cell, send notice to the opportunity that sends upstream data or random access guiding to described UE.
Preferably, described UE is further used for, and determines that auxiliary serving cell need adopt different TA from main Serving cell;
Perhaps, described network side is further used for, and notifies described UE auxiliary serving cell need adopt different TA from main Serving cell.
Preferably, described UE is further used for,
Notify described network side need to activate the TA that described auxiliary serving cell maybe needs to obtain described auxiliary serving cell by described main Serving cell.
A kind of network side network element comprises determining unit, receiving element, computing unit and transmitting element; Wherein,
Determining unit is used to described UE to determine to send the opportunity of upstream data or random access guiding;
Receiving element is used for receiving random access guiding or the upstream data that UE sends;
Computing unit is used for calculating TA;
Transmitting element is used for sending described TA to described UE; And, send opportunity of described transmission upstream data or random access guiding to described UE.
Preferably, described determining unit is further used for, and random access guiding the earliest or the upstream data determined for described UE send opportunity; Wherein, described uplink authorization be opportunity satisfy in present frame or the next frame described transmission upstream data or random access guiding opportunity condition subframe.
A kind of subscriber equipment comprises transmitting element and access unit, wherein,
Transmitting element is used for sending random access guiding or upstream data by auxiliary serving cell to described network side on the transmission upstream data of network side notice or the opportunity of random access guiding;
Access unit after being used for receiving the TA of network side transmission, is finished the access of described auxiliary serving cell.
Among the present invention, the base station is that the Scell of UE is when determining uplink authorization opportunity or sending leading opportunity, can choose up access opportunity as early as possible, and be not the common opportunity (such as the 1st subframe of every frame) that UE sends uplink access preamble, like this, UE just needn't wait for that the sufficiently long time accesses Scell again.The present invention makes the Scell access of UE rapider, can provide the Scell access for UE early when the UE business load is heavier.
Description of drawings
Fig. 1 is existing random access procedure schematic diagram;
Fig. 2 is the flow chart of the method for auxiliary serving cell access of the present invention;
Fig. 3 is the flow chart of method of the auxiliary serving cell access of the embodiment of the invention;
Fig. 4 is the flow chart of method of the auxiliary serving cell access of the embodiment of the invention;
Fig. 5 is the flow chart of method of the auxiliary serving cell access of the embodiment of the invention;
Fig. 6 is the flow chart of method of the auxiliary serving cell access of the embodiment of the invention;
Fig. 7 is the flow chart of method of the auxiliary serving cell access of the embodiment of the invention;
Fig. 8 is the composition structural representation of the network side network element of the embodiment of the invention;
Fig. 9 is the composition structural representation of the subscriber equipment of the embodiment of the invention.
Embodiment
Basic thought of the present invention is: the base station is that the Scell of UE is when determine sending uplink authorization opportunity or sending the opportunity of random access guiding, can choose up access opportunity as early as possible, and be not the common opportunity (such as the 1st subframe of every frame) that UE sends uplink access preamble, like this, UE just needn't wait for that the sufficiently long time accesses Scell again.
For making purpose of the present invention, technical scheme and advantage are clearer, and by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 2 is the flow chart of the method for auxiliary serving cell access of the present invention, and as shown in Figure 2, the method for auxiliary serving cell access of the present invention mainly may further comprise the steps:
Step 201, UE transmission random access guiding or upstream data are to the base station;
Step 202, TA is calculated according to the random access guiding received or upstream data in the base station, feeds back to UE, after UE gets access to TA, can be on this residential quarter normal transceiving data.The base station also can feed back to UE with TA with initial uplink mandate (UL Grant).
Below by concrete example, further illustrate the essence of technical solution of the present invention.
The application scenarios of the following embodiment of the present invention is that in the LTE-A system, base station 1 is the base station with carrier aggregation capacity.Two residential quarters have been administered in base station 1, are respectively Cell1 and Cell2.The ability that partly or entirely can provide carrier aggregation to subscriber equipment in these two residential quarters is with the bandwidth of expansion transmission.UE1 has accessed network (perhaps network switches to base station 1 with UE) by base station 1, base station 1 has disposed two residential quarters of working simultaneously (Cell1, Cell2) according to the ability of UE1 for it, wherein Cell1 provides NAS layer-two mobility information such as the information such as PLMN, global cell identity CGI, Location Area Identification TAC for UE1, be main plot (Pcell) or the main Serving cell of UE1, UE1 receives only system message and the beep-page message of main plot.Cell1, Cell2 can be the RRH residential quarters, or the residential quarter of process repeater, or common residential quarter.These two residential quarters are FDD, and for the residential quarter of TDD, flow process is the same, just no longer are repeated in this description.
Embodiment one
In the present embodiment, Cell2 is that self dispatches self, be prach-FreqOffset=10 the opportunity that UE in the Cell2 broadcasting sends random access guiding, prach-ConfigIndex=3 (subframe 1 of any one radio frames can be sent out random access guiding).Fig. 3 is the flow chart of method of the auxiliary serving cell access of the embodiment of the invention, and as shown in Figure 3, the method for the auxiliary serving cell of embodiment of the invention access mainly may further comprise the steps:
Step 301, base station send MAC CE to UE, comprise the order that Cell2 is activated, and UE after receiving order activates Cell2.
Step 302, base station notice UE, perhaps UE knows that according to the base station preconfigured information Cell2 adopts different TA from the Cell1 needs, need to carry out the process of obtaining TA at Cell2, notify simultaneously UE, (selecting subframe 5 here is to make a distinction for the subframe 1 in broadcasting with system message can to initiate random access guiding in the subframe 5 of next radio frames, it can be any one subframe beyond the subframe 1, radio frames also can be current radio frames, decide the earliest feasible transmission opportunity by the base station, and notice UE).The random access guiding here sends and can combine notice UE with activation command opportunity.
Step 303, UE carries out the process of obtaining TA at Cell2, selects voluntarily a common preamble, by the PRACH of Cell2, on the opportunity in appointment, sends to the base station.
Step 304, base station receive this common preamble, calculate TA, generate response message and send to UE at the DL-SCH of Cell2, comprise TA in this message, can also comprise uplink authorization; This message is indicated by the RA-RNTI on the PDCCH on the Cell2 (perhaps C-RNTI).
Step 305 after UE obtains this TA, is thought access Cell2 success, can be on Cell2 normal transceiving data, and automatically forbid sending random access guiding in subframe 5.
In the present embodiment, if UE does not at the appointed time receive the reaction of base station, then automatically on the given sub-frame of next radio frames such as subframe 5, again send random access guiding, through the yet success of trial of predetermined number of times, then abandon attempting.
Embodiment two
In the present embodiment, Cell2 is that self dispatches self.Fig. 4 is the flow chart of method of the auxiliary serving cell access of the embodiment of the invention, and as shown in Figure 4, the method for the auxiliary serving cell of embodiment of the invention access mainly may further comprise the steps:
Step 401, base station send MAC CE to UE, comprise the order that Cell2 is activated, and UE after receiving order activates Cell2;
Step 402, base station notice UE, perhaps UE knows that according to the base station preconfigured information Cell2 adopts different TA from the Cell1 needs, need to carry out the process of obtaining TA at Cell2, notify simultaneously UE, at the uplink authorization of Cell2, UE can send on the opportunity of authorizing random access guiding or upstream data.The uplink authorization here can combine notice UE with activation command.
Step 403, UE carries out the process of obtaining TA at Cell2, selects voluntarily a common preamble, and on the opportunity of appointment, the UL SCH by Cell2 sends to the base station, and this moment, UE also can send a upstream data to the base station;
Step 404, base station receive this common preamble or upstream data, calculate TA, generate response message and send to UE at the DL-SCH of Cell2, comprise TA in this message, can also comprise uplink authorization; This message is indicated by the RA-RNTI on the PDCCH on the Cell2 (perhaps C-RNTI);
Step 405 after UE obtains this TA, is thought access Cell2 success, can be on Cell2 normal transceiving data.
In the present embodiment, if UE does not at the appointed time receive the reaction of base station, then automatically abandon.
Embodiment three
In the present embodiment, Cell2 is dispatched by Pcell, be prach-FreqOffset=10 the opportunity that UE in the Cell2 broadcasting sends random access guiding, prach-ConfigIndex=3 (subframe 1 of any one radio frames can be sent out random access guiding), Fig. 5 is the flow chart of method of the auxiliary serving cell access of the embodiment of the invention, as shown in Figure 5, the method for the auxiliary serving cell of embodiment of the invention access mainly may further comprise the steps:
Step 501, base station send MAC CE to UE, comprise the order that Cell2 is activated, and UE after receiving order activates Cell2;
Step 502, base station notice UE, perhaps UE knows that according to the base station preconfigured information Cell2 adopts different TA from the Cell1 needs, need to carry out the process of obtaining TA at Cell2, notify simultaneously UE, (selecting subframe 5 here is to make a distinction for the subframe 1 in broadcasting with system message can to initiate random access guiding in the subframe 5 of next radio frames, it can be any one subframe beyond the subframe 1, radio frames also can be current radio frames, decide the earliest feasible transmission opportunity by the base station, and notice UE).The random access guiding here sends and can combine notice UE with activation command opportunity.
Step 503, UE carries out the process of obtaining TA at Cell2, selects voluntarily a common preamble, by the PRACH of Cell2, on the opportunity in appointment, sends to the base station.
Step 504, base station receive this common preamble, calculate TA, generate response message and send to UE at the DL-SCH of Cell2, comprise TA in this message, can also comprise uplink authorization; This message is indicated by the RA-RNTI (perhaps C-RNTI) on the relevant PDCCH of the upper Cell2 of Pcell;
Step 505 after UE obtains this TA, is thought access Cell2 success, can be on Cell2 normal transceiving data, and automatically forbid sending random access guiding in subframe 5.
Embodiment four
In the present embodiment, Cell1 is that self dispatches self, be prach-FreqOffset=10 the opportunity that UE in the Cell2 broadcasting sends random access guiding, prach-ConfigIndex=3 (subframe 1 of any one radio frames can be sent out random access guiding).Fig. 6 is the flow chart of method of the auxiliary serving cell access of the embodiment of the invention, and as shown in Figure 6, the method for the auxiliary serving cell of embodiment of the invention access mainly may further comprise the steps:
Step 601, UE has upstream data to arrive, and data volume is larger, and this moment, Cell2 was in desynchronizing state, and deexcitation, and UE knows that according to the base station preconfigured information Cell2 adopts different TA from the Cell1 needs, need to obtain TA at Cell2;
Step 602, UE needs to activate Cell2 by the Pcell informing base station, perhaps need to carry out the process of obtaining TA at Cell2;
Notification message comprises the cell ID that needs activate maybe needs to obtain TA.
Step 603 sends MAC CE to UE, comprises the order that Cell2 is activated, and UE after receiving order activates Cell2;
Step 604, base station notice UE, (selecting subframe 5 here is to make a distinction for the subframe 1 in broadcasting with system message can to initiate random access guiding in the subframe 5 of next radio frames, it can be any one subframe beyond the subframe 1, radio frames also can be current radio frames, decide the earliest feasible transmission opportunity by the base station, and notice UE).The random access guiding here sends and can combine notice UE with activation command opportunity.
Step 605:UE carries out the process of obtaining TA at Cell2, selects voluntarily a common preamble, by the PRACH of Cell2, on the opportunity in appointment, sends to the base station
Step 606: the base station receives this common preamble, calculates TA, generates response message and sends to UE at the DL-SCH of Cell2, comprises TA in this message, can also comprise uplink authorization; This message is indicated by the RA-RNTI on the PDCCH on the Cell2 (perhaps C-RNTI);
After step 607:UE obtains this TA, think access Cell2 success, can be on Cell2 normal transceiving data, and automatically forbid sending random access guiding in subframe 5.
Embodiment five
In the present embodiment, Cell2 is dispatched by Pcell, and be prach-FreqOffset=10 the opportunity that the UE in the Cell2 broadcasting sends random access guiding, prach-ConfigIndex=3 (subframe 1 of any one radio frames can be sent out random access guiding).Fig. 7 is the flow chart of method of the auxiliary serving cell access of the embodiment of the invention, and as shown in Figure 7, the method for the auxiliary serving cell of embodiment of the invention access mainly may further comprise the steps:
Step 701, UE has downlink data to arrive, and data volume is larger, this moment, Cell2 was in desynchronizing state, and deexcitation, and base station notice UE Cell2 need to adopt different TA from Cell1, need to carry out the TA process of obtaining at Cell2, this moment, UE was from this Cell2 of line activating;
Step 702, base station notice UE, can (subframe n be for normally sending the subframe of random access guiding at the subframe n of current radio frames or next radio frames, present embodiment be subframe 1 rear 3 subframes be exactly n be subframe 4) upper initiate random access guiding (select here after the normal sub-frames 3 subframes be subframe 4 be for system message broadcasting in subframe 1 make a distinction, it can be any one subframe beyond the subframe 1, radio frames also can be current radio frames, decide the earliest feasible transmission opportunity by the base station, and notice UE).The random access guiding here sends and can combine notice UE with activation command opportunity.
Step 703, UE carries out the process of obtaining TA at Cell2, selects voluntarily a common preamble, by the PRACH of Cell2, on the opportunity in appointment, sends to the base station
Step 704, base station receive this common preamble, calculate TA, generate response message and send to UE at the DL-SCH of Cell2, comprise TA in this message, can also comprise uplink authorization; This message is indicated by the RA-RNTI (perhaps C-RNTI) on the relevant PDCCH of the upper Cell2 of Pcell;
Step 705 after UE obtains this TA, is thought access Cell2 success, can be on the DL-SCH on the Cell2 downlink data receiving and feeding back normally, and automatically forbid sending random access guiding in subframe 4.
The present invention has also put down in writing a kind of system of auxiliary serving cell access, comprises UE and network side, wherein,
UE is used for sending random access guiding or upstream data by auxiliary serving cell to described network side opportunity at the uplink authorization of network side notice; And, obtain the TA that described network side feeds back, carry out data transmit-receive in described auxiliary serving cell;
Network side is used for adjusting TA computing time according to the random access guiding or the upstream data that receive, and feeds back to described UE; And notify described UE uplink authorization opportunity.
Those skilled in the art are to be understood that, the system of auxiliary serving cell access of the present invention does not improve the existing communication network configuration, only function and the interactive mode of subnetwork network element are improved, below, will the part that make improvements be described in detail.
In the system of auxiliary serving cell of the present invention access, described uplink authorization opportunity is that described network side is that random access guiding the earliest or the upstream data that described UE determines sends opportunity.
In the system of auxiliary serving cell of the present invention access, described uplink authorization is the subframe after first subframe in present frame or the next frame opportunity.
In the system of auxiliary serving cell of the present invention access, described network side is further used for, and sends together to the notice on described uplink authorization opportunity with to the notice of the activation command of described auxiliary serving cell to described UE; Perhaps, after to the notice of the activation command of described auxiliary serving cell, send the described uplink authorization notice on opportunity to described UE
In the system of auxiliary serving cell access of the present invention, UE is further used for, and determines that auxiliary serving cell need adopt different TA from main Serving cell;
Perhaps, described network side is further used for, and notifies described UE auxiliary serving cell need adopt different TA from main Serving cell.
Above-mentioned network side network element mainly refers to the base station.
Fig. 8 is the composition structural representation of the network side network element of the embodiment of the invention, and as shown in Figure 8, the network side network element of the embodiment of the invention comprises determining unit 80, receiving element 81, computing unit 82 and transmitting element 83; Wherein,
Determining unit 80 is used to described UE to determine to send the opportunity of upstream data or random access guiding;
Receiving element 81 is used for receiving random access guiding or the upstream data that UE sends;
Computing unit 82 is used for calculating TA;
Transmitting element 83 is used for sending described TA to described UE; And, send opportunity of described transmission upstream data or random access guiding to described UE.
Above-mentioned determining unit 80 is further used for, and random access guiding the earliest or the upstream data determined for described UE send opportunity; Wherein, described uplink authorization be opportunity satisfy in present frame or the next frame described transmission upstream data or random access guiding opportunity condition subframe.
Above-mentioned network side network element mainly refers to the base station.
Art technology should be appreciated that the practical function of the each processing unit of network side network element shown in Figure 8 can be with reference to the associated description of the method and system of aforementioned access control and understand.Its function can realize by the program that runs on the processor, also can realize by concrete logical circuit.
Fig. 9 is the composition structural representation of the subscriber equipment of the embodiment of the invention, and as shown in Figure 9, the UE of the embodiment of the invention comprises transmitting element 90 and access unit 91, wherein,
Transmitting element 90 is used for sending random access guiding or upstream data by auxiliary serving cell to described network side on the transmission upstream data of network side notice or the opportunity of random access guiding;
Access unit 91 after being used for receiving the TA of network side transmission, is finished the access of described auxiliary serving cell.
Above-mentioned network side network element mainly refers to the base station.
Art technology should be appreciated that the practical function of the each processing unit of subscriber equipment shown in Figure 9 can be with reference to the associated description of the method and system of aforementioned access control and understand.Its function can realize by the program that runs on the processor, also can realize by concrete logical circuit.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (21)
1. the method for auxiliary serving cell access is characterized in that described method comprises:
User equipment (UE) is at the transmission upstream data of network side notice or send upstream data or random access guiding by auxiliary serving cell to described network side the opportunity of random access guiding;
Described UE finishes the access of described auxiliary serving cell after receiving the time adjustment TA of network side feedback.
2. method according to claim 1 is characterized in that,
Described TA is that described network side calculates rear feedback according to random access guiding or the described upstream data that described UE sends.
3. method according to claim 1 is characterized in that, be that described network side is that random access guiding the earliest or the upstream data that described UE determines sends opportunity the opportunity of described transmission upstream data or random access guiding.
4. each described method in 3 according to claim 1 is characterized in that, the opportunity of described transmission upstream data or random access guiding be satisfy in present frame or the next frame described transmission upstream data or random access guiding opportunity condition subframe.
5. method according to claim 1 is characterized in that, described method also comprises:
Described UE receive that described network side sends together to the notice on opportunity of described transmission upstream data or random access guiding with to the notice of the activation command of described auxiliary serving cell; Perhaps, described UE receives the notice to opportunity of described transmission upstream data or random access guiding of described network side transmission after sending the activation command of described auxiliary serving cell.
6. method according to claim 1 is characterized in that, described method also comprises:
UE determines that auxiliary serving cell need adopt different TA from main Serving cell;
Perhaps, described UE receives the notice that described auxiliary serving cell that described network side sends and main Serving cell need adopt different TA.
7. method according to claim 1 is characterized in that, described method also comprises:
Described UE notifies described network side need to activate the TA that described auxiliary serving cell maybe needs to obtain described auxiliary serving cell by described main Serving cell.
8. each described method in 7 according to claim 1 is characterized in that described network side is the base station.
9. the method for auxiliary serving cell access is characterized in that described method comprises:
Network side notice UE sends the opportunity of upstream data or random access guiding;
Described network side receive described UE by auxiliary serving cell behind the upstream data that sends or random access guiding, calculate TA and also feed back to described UE, make described UE be linked into described auxiliary serving cell.
10. method according to claim 9 is characterized in that, be that described network side is that random access guiding the earliest or the upstream data that described UE determines sends opportunity the opportunity of described transmission upstream data or random access guiding.
11. according to claim 9 or 10 described methods, it is characterized in that described method also comprises:
Described network side sends to the notice on opportunity of described transmission upstream data or random access guiding with to the notice of the activation command of described auxiliary serving cell together to described UE; Perhaps, described network side after sending the activation command of described auxiliary serving cell to the notice of described UE transmission to the opportunity of described transmission upstream data or random access guiding.
12. according to claim 9 or 10 described methods, it is characterized in that described method also comprises:
Described network side notifies the described auxiliary serving cell of described UE need adopt different TA from main Serving cell.
13. the system of an auxiliary serving cell access comprises UE and network side, it is characterized in that,
Network side is used for calculating TA according to the random access guiding that receives or upstream data, and sends to described UE; And notify described UE to send the opportunity of upstream data or random access guiding;
UE is used for sending random access guiding or upstream data by auxiliary serving cell to described network side on the opportunity of described transmission upstream data or random access guiding; And, receive described TA after, finish the access of described auxiliary serving cell.
14. system according to claim 13 is characterized in that, be that described network side is that random access guiding the earliest or the upstream data that described UE determines sends opportunity the opportunity of described transmission upstream data or random access guiding.
15. according to claim 13 or 14 described systems, it is characterized in that, described uplink authorization be opportunity satisfy in present frame or the next frame described transmission upstream data or random access guiding opportunity condition subframe.
16. system according to claim 13 is characterized in that,
Described network side is further used for, and sends together to the notice on opportunity of described transmission upstream data or random access guiding with to the notice of the activation command of described auxiliary serving cell to described UE;
Perhaps, after to the notice of the activation command of described auxiliary serving cell, send notice to the opportunity that sends upstream data or random access guiding to described UE.
17. system according to claim 13 is characterized in that,
Described UE is further used for, and determines that auxiliary serving cell need adopt different TA from main Serving cell;
Perhaps, described network side is further used for, and notifies described UE auxiliary serving cell need adopt different TA from main Serving cell.
18. system according to claim 13 is characterized in that, described UE is further used for,
Notify described network side need to activate the TA that described auxiliary serving cell maybe needs to obtain described auxiliary serving cell by described main Serving cell.
19. a network side network element is characterized in that, comprises determining unit, receiving element, computing unit and transmitting element; Wherein,
Determining unit is used to described UE to determine to send the opportunity of upstream data or random access guiding;
Receiving element is used for receiving random access guiding or the upstream data that UE sends;
Computing unit is used for calculating TA;
Transmitting element is used for sending described TA to described UE; And, send opportunity of described transmission upstream data or random access guiding to described UE.
20. network side network element according to claim 19 is characterized in that described determining unit is further used for, random access guiding the earliest or the upstream data determined for described UE send opportunity; Wherein, described uplink authorization be opportunity satisfy in present frame or the next frame described transmission upstream data or random access guiding opportunity condition subframe.
21. a subscriber equipment is characterized in that, comprises transmitting element and access unit, wherein,
Transmitting element is used for sending random access guiding or upstream data by auxiliary serving cell to described network side on the transmission upstream data of network side notice or the opportunity of random access guiding;
Access unit after being used for receiving the TA of network side transmission, is finished the access of described auxiliary serving cell.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110218431.1A CN102917469B (en) | 2011-08-01 | 2011-08-01 | The method and system of auxiliary serving cell access, network side element, user equipment |
| PCT/CN2012/077260 WO2013016985A1 (en) | 2011-08-01 | 2012-06-20 | Method and system for accessing auxiliary service cell, network-side network element, and user equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110218431.1A CN102917469B (en) | 2011-08-01 | 2011-08-01 | The method and system of auxiliary serving cell access, network side element, user equipment |
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| CN102917469A true CN102917469A (en) | 2013-02-06 |
| CN102917469B CN102917469B (en) | 2018-08-28 |
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| CN201110218431.1A Expired - Fee Related CN102917469B (en) | 2011-08-01 | 2011-08-01 | The method and system of auxiliary serving cell access, network side element, user equipment |
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| WO (1) | WO2013016985A1 (en) |
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| US10470061B2 (en) | 2014-05-09 | 2019-11-05 | Huawei Technologies Co., Ltd. | User equipment, base station, base station access method, and radio link monitoring method |
| US11006292B2 (en) | 2014-05-09 | 2021-05-11 | Huawei Technologies Co., Ltd. | User equipment, base station, base station access method, and radio link monitoring method |
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Also Published As
| Publication number | Publication date |
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| CN102917469B (en) | 2018-08-28 |
| WO2013016985A1 (en) | 2013-02-07 |
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