CN103228053A - Random access method of multi-carrier system, base station, as well as mobile terminal and random access system - Google Patents
Random access method of multi-carrier system, base station, as well as mobile terminal and random access system Download PDFInfo
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Abstract
The invention discloses a random access method of a multi-carrier system, a base station, as well as a mobile terminal and a random access system. Under the scene that the base station uses a Random RA-RNTI (Access-Radio Network Temporary Identifier) to instruct a cross-carrier to address a random access response, the base station sends a PDCCH (Physical Downlink Control Channel) signaling in a cell I, the mobile terminal sends a random access preamble to a cell II after receiving the PDCCH signaling, and random access response is received on the cell I. The technical scheme can solve the problem of random access response receiving under a multiple TA (Time Alignment) condition; and on the condition that cross-carrier random access is guaranteed, the terminal can receive the random access response accurately and the base station can find out carrier information used by the terminal accurately.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of multicarrier system accidental access method and base station and portable terminal and system.
Background technology
Advanced long-term evolution system (Long Term Evolution Advance, abbreviate LTE-Advanced as) be third generation partner program (the 3rd Generation Partner Project, abbreviating 3GPP as) tissue is in order to satisfy (the International Telecommunication Union of International Telecommunications Union, abbreviate ITU as), the requirement of senior international mobile communication (International Mobile Telecommunication-Advanced abbreviates IMT-Advanced as) and the standard released.The LTE-Advanced system is at long evolving system (Long Term Evolution, abbreviate LTE as) an evolution version on the basis, it has introduced the primary demand that a lot of new technologies satisfy IMT-Advanced, and a wherein most important technology is exactly a carrier aggregation.
Because the property in short supply of present radio spectrum resources, the frequency spectrum resource that each mobile operator of the world has is often more scattered, the index of peak rate is higher (supports 100Mbps under the high mobility and IMT-Advanced requires, Hypomobility is supported 1Gbps down), bandwidth with the maximum 20MHz of present LTE standard can't satisfy the IMT-Advanced requirement, so need extend to more high bandwidth, such as 40MHz, 60MHz, in addition higher.One of method that improves bandwidth and peak rate is that frequency domain is expanded, and for example several LTE frequency bands based on 20MHz is carried out bandwidth by the mode of " carrier aggregation " and enlarges the essence of carrier aggregation technology that Here it is.Therefore, the LTE-Advanced system also belongs to multicarrier system.
Used in the LTE-Advanced system of carrier aggregation technology, the carrier wave that participates in polymerization is called as component carrier (Component Carrier), subscriber equipment (User Equipment abbreviates UE as) can carry out the data transmit-receive transmission with eNB simultaneously on a plurality of component carriers.The frequency range that component carrier can use LTE to define also can be used the newly-increased specially frequency range as LTE-Advanced.Based on present frequency spectrum resource anxiety, can not always have component carrier continuous on the frequency domain can distribute to operator and use, so component carrier can be continuous on frequency band, also can be discontinuous.
In carrier aggregation system,, a first carrier and one or more second carrier wave can be arranged for some users.First carrier is generally main carrier wave, can carrier signaling and data, and second carrier wave is mainly used in the carrying data, also can the bearing part signaling.Carrier wave can be divided into up-link carrier (being used for the transfer of data of subscriber equipment to control station) and descending carrier (being used for the transfer of data of control station to subscriber equipment).The wireless service areas of corresponding first carrier is first service area, and the wireless service areas of corresponding second carrier wave is second service area.In different systems, first carrier, first service area and second carrier wave, the notion of second service area and title all can have corresponding details definition.
For example in the LTE/LTE-A system, the subscriber equipment that has disposed carrier aggregation has only a RRM (Radio Resource Control is called for short RRC) to connect in net.RRM connect set up/rebulid/when switching generation, network access Identifier (Network Access Identifier is provided, abbreviation NAI) service area (Serving Cell) of mobile message and safety input is called as main plot (Primary Cell, PCell), i.e. first service area, and according to UE capability configuration can dispose one or more auxilliary sub-district (Seondary Cell, SCell), i.e. second service area.Further, the carrier wave of main plot correspondence is exactly a main carrier, comprising being used for descending principal component carrier wave (the Downlink Primary Component Carrier of control station to the customer equipment data transmission, DL PCC) be used for the up principal component carrier wave (Uplink Primary Component Carrier, UL PCC) that subscriber equipment is communicated by letter to the control station number.Similarly, the carrier wave of auxilliary sub-district correspondence is exactly auxilliary component carrier, wherein, comprise and be used for descending auxilliary component carrier (the Downlink Secondary Component Carrier of control station to the customer equipment data transmission, DL SCC) and be used for the up auxilliary component carrier (Uplink Secondary Component Carrier, UL SCC) of subscriber equipment to the control station data communication.
In the LTE system, in order to realize and to keep uplink synchronous between subscriber equipment and the base station, the base station is according to propagation delay time transmitting time lead (the Timing Advance between base station and each subscriber equipment, abbreviate TA as) to each subscriber equipment, the opportunity that the Timing Advance that subscriber equipment sends according to the base station shifts to an earlier date or postpones uplink separately, terminal makes the upward signal of different user devices all arrive the base station within the receive window of base station to the propagation delay time of base station among the user thereby remedy.
In the LTE system, in order to obtain and to keep uplink synchronous between UE and the base station, the base station is that UE has disposed a upstream synchronous timing device (Time Alignment Timer, abbreviate TAT as), if UE can receive the Timing Advance that the base station sends to UE before TAT is overtime, then think to keep uplink synchronous between this UE and this base station, otherwise TAT is overtime, UE thinks and loses uplink synchronous.At not synchronous regime or desynchronizing state, UE is by the uplink synchronous between random access procedure acquisition and the base station, UE receives accidental access response (the Random Access Response that the base station sends, RAR) after, start timer TAT, and the Timing Advance that carries according to the base station in advance or the opportunity of postponing uplink in accidental access response.After the uplink synchronous of UE acquisition and base station, at the TAT run duration,, then restart TAT if receive the TA order (TA command) that the base station sends to UE, and using the Timing Advance that carries in the TA order in advance or postpone the uplink time, UE thinks own and continues and base station maintenance uplink synchronous; If UE does not receive the TA order at the TAT run duration, be that TAT is when overtime, UE thinks own and has lost uplink synchronous with the base station, all up-downgoing resources that the deletion dynamic assignment is given this UE, empty all up mixed self-adapting retransmission buffer to be sent (HARQ buffer) data, notice Radio Resource control (Radio Resource Control, abbreviation RRC) sublayer discharges static state/semi-static ascending physical signal resource of distributing to this UE, if after this there is upstream data need send or have downlink data to need to receive, UE needs to insert at first at random to regain uplink synchronous.
After introducing carrier aggregation, subscriber equipment may be simultaneously operated on a plurality of component carriers, and these component carriers can be continuous on frequency band, also can be discontinuous; Can be in the identical frequency band, can also be to come from different frequency bands.For the discontinuous situation of component carrier, perhaps component carrier comes from the situation of different frequency bands, because each component carrier has different transmission characteristics, the Timing Advance on each component carrier may be different; Even each component carrier belongs to identical frequency band and on frequency band continuously, if each component carrier is derived from different Remote Radio Unit (remote radio units, abbreviate RRU as), perhaps cover in order to increase the sub-district, each component carrier is handled via different repeater (repeater) respectively, and then the Timing Advance on each component carrier also may be different.In the LTE system, UE only is operated in that (for TDD mode is a carrier wave on the carrier wave, comprise up, descending a pair of carrier wave for mode of frequency division duplexing, for convenience of description, be called for short a carrier wave here), only need to safeguard the uplink synchronous of a up link, this scene abbreviates single TA as, and in carrier aggregation, UE may be simultaneously operated on a plurality of component carriers, and the TA of these component carriers might be different.This scene abbreviate as many TA (multiple TA, MTA)
As previously mentioned, in single TA scene, UE is by the uplink synchronous between random access procedure acquisition and the base station.Random access procedure can be by media access control layer (the Medium Access Control of Physical Downlink Control Channel signaling (PDCCH order) or UE, be called for short MAC) initiate, alternatively, PDCCH order or Radio Resource control (RRC, Radio Resource Control) signaling can be distributed special-purpose random access guiding (Random Access Preamble) for UE, and then random access procedure is non-mode based on competition; Otherwise UE need select random access guiding, and then random access procedure is the mode based on competition (Contention based).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.
Concrete, comprise following four steps as shown in Figure 1 based on the random access procedure of competing:
Step 1: terminal sends random access guiding (Random Access Preamble) up by Random Access Channel (RACH, Random Access Channel are called for short);
Step 2: the media access control layer of base station (eNB) (Medium Access Control, be called for short MAC) generation accidental access response (Random Access Response, abbreviation RAR) message sends to terminal at DSCH Downlink Shared Channel (Downlink-Shared Channel is called for short DL-SCH); At least comprise random access guiding sign (Random Access Preamble Identifier in this message, abbreviation RAPID), time adjustment information (Time Alignment, abbreviation TA), initial uplink mandate (UL Grant, Uplink Grant) and interim sub-district-Radio Network Temporary Identifier (Temporary C-RNTI); This message is passed through at Physical Downlink Control Channel (Physical Downlink Control Channel, abbreviation PDCCH) access-Radio Network Temporary Identifier at random (RA-RNTI, Random Access-Radio Network Temporary Identifier) on is indicated (be also referred to as RAR and use the RA-RNTI addressing); UE need receive this accidental access response in a predetermined receive window (RAR window).Described receive window length (ra-Response Window Size/) defines in system broadcast information, and window sends end back the 3rd frame at random access guiding to begin.If UE does not receive the accidental access response of expection in predetermined receive window, restart execution after the UE meeting is waited for the fixed time according to the time delay (backoff parameter value) that oneself is stored or indicate the base station and insert (promptly get back to step 1 and begin execution) at random.
Step 3: terminal goes up at up shared transmission channel (Uplink-Shared Channel is called for short UL-SCH) and sends the first transmission that is scheduled (Scheduled Transmission); The content of this message comprises sub-district-Radio Network Temporary Identifier (C-RNTI), medium access control unit (MAC Control Element) at least or comprises that competition solves the public control logic channel Service Data Unit (CCCH SDU) of sign (Contention Resolution Identity); The transmission support of this message mixes automatic repeat requests (Hybrid Automatic Retransmission re Quest is called for short HARQ).
Step 4: the base station sends competition and solves message (Contention Resolution) on DL-SCH; This message is indicated by C-RNTI on the PDCCH or interim C-RNTI, can comprise that competition solves sign; HARQ is supported in the transmission of this message.
For non-competing random access procedure, then do not compete solution process (as shown in Figure 2).Random access procedure can only carry out in the main plot in the conventional art, can not carry out in auxilliary sub-district.
But, be under the MTA scene at many TA, the uplink synchronous that obtains on the SCell but possibly can't be continued to use said process.Reason is that SCell may be dispatched by other Cell or by other area interference, so the PDCCH or the PDCCH that do not dispatch RAR message resource in the step 2 are interfered.In this case, the RAR in the step 2 can only scheduling/transmission on the another one carrier wave (as shown in Figure 3).Promptly using RA-RNTI to stride under the carrier wave addressing accidental access response situation under this new scene, if UE selects random access guiding at random, the base station can't learn it is which UE is sending random access guiding, therefore also can't know except the carrier wave that receives random access guiding, which carrier wave UE is also using, thus can't determine should on which different carrier wave scheduling/transmission RAR message.In addition, also can produce the problem of RAR time of reception.For example, existing RAR receive window designs under single TA situation, considers UE will stride carrier dispatching or receive RAR (RAR is at this moment by the RA-RNTI addressing on the scheduling carrier wave), does not all have specific definition should how to design receive window in the technology at present.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of multicarrier system accidental access method and base station and portable terminal and system, solves the problem of receiving random access response under many TA situation.
In order to solve the problems of the technologies described above, the invention provides a kind of accidental access method of carrier aggregation system, wherein, the base station uses random access radio network temporary mark (RA-RNTI) indication to stride under the scene of carrier wave addressing accidental access response, described base station is one transmission Physical Downlink Control Channel signaling in the sub-district, described terminal sends random access guiding after receiving described Physical Downlink Control Channel signaling on sub-district two, receiving random access response on described sub-district one.
Further, said method can also have following characteristics:
Described terminal is provided with the receive window length of accidental access response more than or equal to the receive window length under the local carrier scheduling scene, correctly receive accidental access response in the receive window length of described terminal after sending random access guiding corresponding to this terminal, judge that then random access guiding sends successfully, otherwise, judge that then random access guiding sends failure.
Further, said method can also have following characteristics:
It is that the receive window length that described base station uses RA-RNTI to stride accidental access response under the scene of carrier wave addressing accidental access response adds three subframes that described terminal is provided with length of timer, when sending random access guiding, described terminal opens this timer, in timer time length, correctly receive accidental access response corresponding to this terminal, judge that then random access guiding sends successfully, otherwise, judge that then random access guiding sends failure.
Further, said method can also have following characteristics:
A described base station triggering terminal adopts noncompetitive to insert at random, specifically comprise: described base station triggers terminal is provided with the random access guiding index all the time in the Physical Downlink Control Channel that the auxilliary sub-district of being striden carrier dispatching initiates to insert at random be nonzero value, and described base station sends to the parameter that described terminal is used for inserting at random and comprises random access guiding index and Random Access Channel mask index.
Further, said method can also have following characteristics:
The random access resource information that terminal reports this terminal to use on the sub-district that is different from described sub-district two, and insert at random being striden on the auxilliary sub-district of carrier dispatching the resource of using described random access resource information to comprise, described random access resource information comprises one or more in the following information: random access guiding, insert time resource, the frequency resource of using at random.
Further, said method can also have following characteristics:
Described base station receives that terminal is after the described random access resource information of being striden the random access guiding that sends on the auxilliary sub-district of carrier dispatching and sending on the main plot, send accidental access response on the setting sub-district, described setting sub-district comprises the main plot of terminal or strides the auxilliary sub-district of the described sub-district two of carrier dispatching.
Further, said method can also have following characteristics:
When described terminal adopts competitive mode to insert at random, described base station detects two or more terminals and has used identical random access resource, and cancellation is carried out feedback information to terminal or notified terminal to reselect random access resource on corresponding main plot and insert at random.
Further, said method can also have following characteristics:
Described base station sends accidental access response on the sub-district of receiving all participation carrier aggregation outside the sub-district of non-special-purpose random access guiding, terminal is being set receiving random access response on the sub-district, and described setting sub-district comprises the main plot of terminal or strides the auxilliary sub-district of the described sub-district two of carrier dispatching.
In order to solve the problems of the technologies described above, the present invention also provides a kind of base station, comprise that base station side inserts processing module at random, wherein, described base station side inserts processing module at random, using random access radio network temporary mark (RA-RNTI) to stride under the scene of carrier wave addressing accidental access response, on sub-district one, stride the Physical Downlink Control Channel signaling of the described sub-district two of carrier dispatching.
Further, above-mentioned base station can also have following characteristics:
Described base station side inserts processing module at random, also being used for a triggering terminal adopts noncompetitive to insert at random, specifically comprise: triggering terminal is provided with the random access guiding index all the time in the Physical Downlink Control Channel that the auxilliary sub-district of being striden carrier dispatching initiates to insert at random be nonzero value, sends to the parameter that described terminal is used for inserting at random and comprise random access guiding index and Random Access Channel mask index.
Further, above-mentioned base station can also have following characteristics:
Described sub-district two is auxilliary sub-district, described base station side inserts processing module at random, be used to also to receive that terminal is after random access guiding that sends on this auxilliary sub-district and the described random access resource information that sending on the main plot, send accidental access response on described sub-district one, described sub-district one comprises the main plot of terminal or strides the auxilliary sub-district of the described sub-district two of carrier dispatching.
Further, above-mentioned base station can also have following characteristics:
Described base station side inserts processing module at random, also be used for when terminal adopts competitive mode to insert at random, detect two or more terminals and used identical random access resource, cancellation is carried out feedback information to terminal or is notified terminal to reselect random access resource on corresponding main plot and insert at random.
Further, above-mentioned base station can also have following characteristics:
Described base station side inserts processing module at random, also is used for sending accidental access response on the sub-district of receiving all participation carrier aggregation outside the sub-district of non-special-purpose random access guiding.
In order to solve the problems of the technologies described above, the present invention also provides a kind of terminal, comprise that end side inserts processing module at random, it is characterized in that, described end side inserts processing module at random, after being used to receive described Physical Downlink Control Channel signaling, on sub-district two, send random access guiding, receiving random access response on sub-district one.
Further, above-mentioned terminal can also have following characteristics:
Described end side inserts processing module at random, also be used to be provided with the receive window length of accidental access response more than or equal to the receive window length under the local carrier scheduling scene, correctly receive accidental access response in the receive window length after sending random access guiding corresponding to this terminal, judge that then random access guiding sends successfully, otherwise, judge that then random access guiding sends failure.
Further, above-mentioned terminal can also have following characteristics:
Described end side inserts processing module at random, also be used to be provided with length of timer and be the receive window length of using RA-RNTI to stride accidental access response under the scene of carrier wave addressing accidental access response in described base station and add three subframes, when sending random access guiding, described terminal opens this timer, in timer time length, correctly receive accidental access response corresponding to this terminal, judge that then random access guiding sends successfully, otherwise, judge that then random access guiding sends failure.
Further, above-mentioned terminal can also have following characteristics:
Described end side inserts processing module at random, also be used on the sub-district that is different from sub-district two, reporting the random access resource information of this terminal use, and insert at random being striden on the auxilliary sub-district of carrier dispatching the resource of using described random access resource information to comprise, described random access resource information comprises one or more in the following information: random access guiding, insert time resource, the frequency resource of using at random.
Further, above-mentioned terminal can also have following characteristics:
Described end side inserts processing module at random, also is used for setting receiving random access response on the sub-district, and described setting sub-district comprises the main plot of terminal or strides the auxilliary sub-district of the described sub-district two of carrier dispatching.
In order to solve the problems of the technologies described above, the present invention also provides a kind of random access system of carrier aggregation system, comprises above-mentioned base station, and above-mentioned terminal.
This programme can solve the problem of receiving random access response under many TA situation, guarantees striding under the carrier wave access situation at random, and terminal is receiving random access response accurately, and the base station can know accurately that terminal uses each carrier information.
Description of drawings
Fig. 1 is based on competition random access procedure flow chart in the prior art;
Fig. 2 is based on non-competing random access procedure flow chart in the prior art;
Fig. 3 is the schematic diagram of application scenarios among the embodiment;
Fig. 4 is the multicarrier system accidental access method flow chart among the embodiment.
Embodiment
This programme application scenarios is that accidental access response is used for striding the scene that random access radio network temporary mark (RA-RNTI) transmission accidental access response is used in carrier dispatching random access procedure base station.UE can adopt non-competing the access at random or competition access at random in this scene.UE sends random access guiding in the up of SCell by Random Access Channel (RACH, Random Access CHannel).
Media access control layer (the MAC of base station (eNB), Medium Access Control) generates accidental access response (Random Access Response message, RAR message) send to terminal at DSCH Downlink Shared Channel (DL-SCH, Downlink-Shared Channel); At least wrap one of following message in this message: random access guiding sign (RAPID, Random Access Preamble IDentifier), time adjustment information (TA, Time Alignment), initial uplink mandate (UL Grant, Uplink Grant); The PDCCH that dispatches described RAR message by on the main plot or the RA-RNTI that carries out the auxilliary sub-district of striding carrier dispatching identify.
At the accurate problem of receiving random access response of terminal under many TA situation, as shown in Figure 4, the accidental access method of carrier aggregation system comprises: the base station uses random access radio network temporary mark (RA-RNTI) indication to stride under the scene of carrier wave addressing accidental access response, described base station is one transmission Physical Downlink Control Channel signaling in the sub-district, after described terminal receives described Physical Downlink Control Channel signaling, on sub-district two, send random access guiding, receiving random access response on described sub-district one.
Sub-district one can be a dispatching cell, and sub-district two can be the sub-district that is scheduled.
Described terminal is provided with the receive window length of accidental access response more than or equal to the receive window length under the local carrier scheduling scene, correctly receive accidental access response in the receive window length of described terminal after sending random access guiding corresponding to this terminal, judge that then random access guiding sends successfully, otherwise, judge that then random access guiding sends failure.
Implementation can also be: it is that the receive window length that described base station uses RA-RNTI to stride accidental access response under the scene of carrier wave addressing accidental access response adds three subframes that described terminal is provided with length of timer, when sending random access guiding, described terminal opens this timer, in timer time length, correctly receive accidental access response corresponding to this terminal, judge that then random access guiding sends successfully, otherwise, judge that then random access guiding sends failure.
Terminal continues follow-up flow process according to prior art after judging that random access guiding sends failure, and the receive window that for example resends random access guiding and start accidental access response is waited for new RAR message, perhaps restarts timer and waits for new RAR message.
Wherein, non-ly stride in the carrier dispatching random access procedure stochastic parameter to insert response window length (ra-Response Window Size) maximum be 10 subframes, this parameter length is set in this programme, for example be set to 20 subframes greater than 10 subframes.
At the accurate problem of receiving random access response in base station under many TA situation, the present invention can also adopt a kind of in the following method:
Method one
Striding under the carrier dispatching situation, the base station is only triggered UE and is adopted non-competing access at random.Specific implementation comprises: in the control information (PDCCH order) that base station triggers UE initiates to insert at random on being striden the sub-district of carrier dispatching ra-PreambleIndex being set is non-zero (000000) value.In addition, in described control information or RRC signaling, give the non-competing random access resource of terminal distribution (random access guiding index (ra-PreambleIndex) and Random Access Channel mask index (ra-PRACH-MaskIndex) for example.Described control information sends being striden on the sub-district of carrier dispatching.
Terminal receives PDCCH order on scheduling carrier wave, use the dedicated random access resource of wherein formulating to initiate to insert at random.
The special-purpose random access guiding that UE sends on the sub-district that is scheduled is received in the base station, on dispatching cell, utilize conventional art RAR receive window method (to comprise and use traditional length of window value, need not to be provided with especially ra-Response Window Size in the broadcast this moment) send relevant RAR, this particular carrier wave comprises the main plot of UE, perhaps strides the auxilliary sub-district of this UE of carrier dispatching.
Terminal utilizes conventional art RAR receive window method (comprising traditional length of window value) to receive relevant RAR on dispatching cell after the sub-district that is scheduled sends special-purpose random access guiding.
Can be provided with in this method stride the carrier wave accidental access response receive window length greater than conventional art, it is n subframe that broadcast parameter ra-Response Window Size maximum for example is set, (n is greater than traditional maximum m=10 subframe, for example n=20).If UE does not correctly receive the RAR message of correspondence oneself in the receive window that prolongs, think that promptly random access guiding sends failure, can continue follow-up flow process according to prior art.Merit attention, the receive window of accidental access response still is n in the follow-up flow process.
A timer can also be set receive RAR, described timer timing length is the receive window length+3 subframe+random access guiding transmitting time under the local carrier scheduling scene.UE begins to start this timer when SCell sends random access guiding, if timer expiry still not the receive window in conventional art receive corresponding own RAR message, think promptly that random access guiding sends to fail.Otherwise think that random access guiding sends successfully, stops described timer.
A timer can also be set receive RAR, described timer timing length is receive window length+3 subframe under the local carrier scheduling scene.UE sends random access guiding at SCell and sends and begin to start this timer when finishing, if timer expiry still not the receive window in conventional art receive corresponding oneself RAR message, promptly think access failure.Otherwise think that random access guiding sends successfully, stops described timer.
Method two
Striding under the carrier dispatching situation, the random access resource information that terminal reports this terminal to use on the sub-district that is different from described sub-district two, and insert at random being striden on the auxilliary sub-district of carrier dispatching the resource of using described random access resource information to comprise, described random access resource information comprises one or more in the following information: random access guiding, insert time resource, the frequency resource of using at random.
The random access guiding and the last relevant access-in resource information of PCELL that the last UE of SCell sends received in the base station.
Described base station receives that terminal is after the described random access resource information of being striden the random access guiding that sends on the auxilliary sub-district of carrier dispatching and sending on the main plot, send accidental access response on the setting sub-district, described setting sub-district comprises the main plot of terminal or strides the auxilliary sub-district of the described sub-district two of carrier dispatching.
Terminal utilizes conventional art RAR receive window method (comprising traditional length of window value) to receive relevant RAR on dispatching cell after the sub-district that is scheduled sends random access guiding.
When described terminal adopts competitive mode to insert at random, described base station detects two or more terminals and has used identical random access resource, and cancellation is carried out feedback information to terminal or notified terminal to reselect random access resource on corresponding main plot and insert at random.
Method three
Described base station sends accidental access response on the sub-district of receiving all participation carrier aggregation outside the sub-district of non-special-purpose random access guiding, terminal is being set receiving random access response on the sub-district, and described setting sub-district comprises the main plot of terminal or strides the auxilliary sub-district of the described sub-district two of carrier dispatching.
Terminal utilizes conventional art RAR receive window method (comprising traditional length of window value) to receive relevant RAR at dispatching cell or main plot after the sub-district that is scheduled sends random access guiding.
Base station in this programme comprises that base station side inserts processing module at random.
Described base station side inserts processing module at random, using random access radio network temporary mark (RA-RNTI) to stride under the scene of carrier wave addressing accidental access response, strides the Physical Downlink Control Channel signaling of the described sub-district two of carrier dispatching on sub-district one.
Sub-district one can be a dispatching cell, and sub-district two can be the sub-district that is scheduled.
Described base station side inserts processing module at random, also being used for a triggering terminal adopts noncompetitive to insert at random, specifically comprise: triggering terminal is provided with the random access guiding index all the time in the Physical Downlink Control Channel that the auxilliary sub-district of being striden carrier dispatching initiates to insert at random be nonzero value, sends to the parameter that described terminal is used for inserting at random and comprise random access guiding index and Random Access Channel mask index.
Described sub-district two is auxilliary sub-district, described base station side inserts processing module at random, be used to also to receive that terminal is after random access guiding that sends on this auxilliary sub-district and the described random access resource information that sending on the main plot, send accidental access response on described sub-district one, described sub-district one comprises the main plot of terminal or strides the auxilliary sub-district of the described sub-district two of carrier dispatching.
Described base station side inserts processing module at random, also be used for when terminal adopts competitive mode to insert at random, detect two or more terminals and used identical random access resource, cancellation is carried out feedback information to terminal or is notified terminal to reselect random access resource on corresponding main plot and insert at random.
Described base station side inserts processing module at random, also is used for sending accidental access response on the sub-district of receiving all participation carrier aggregation outside the sub-district of non-special-purpose random access guiding.
Terminal in this programme comprises that end side inserts processing module at random.
Described end side inserts processing module at random, be used to receive described Physical Downlink Control Channel signaling after, on sub-district two, send random access guiding, receiving random access response on sub-district one.
Described end side inserts processing module at random, also be used to be provided with the receive window length of accidental access response more than or equal to the receive window length under the local carrier scheduling scene, correctly receive accidental access response in the receive window length after sending random access guiding corresponding to this terminal, judge that then random access guiding sends successfully, otherwise, judge that then random access guiding sends failure.
Described end side inserts processing module at random, also be used to be provided with length of timer and be the receive window length of using RA-RNTI to stride accidental access response under the scene of carrier wave addressing accidental access response in described base station and add three subframes, when sending random access guiding, described terminal opens this timer, in timer time length, correctly receive accidental access response corresponding to this terminal, judge that then random access guiding sends successfully, otherwise, judge that then random access guiding sends failure.
Described end side inserts processing module at random, also be used on the sub-district that is different from sub-district two, reporting the random access resource information of this terminal use, and insert at random being striden on the auxilliary sub-district of carrier dispatching the resource of using described random access resource information to comprise, described random access resource information comprises one or more in the following information: random access guiding, insert time resource, the frequency resource of using at random.
Described end side inserts processing module at random, also is used for setting receiving random access response on the sub-district, and described setting sub-district comprises the main plot of terminal or strides the auxilliary sub-district of the described sub-district two of carrier dispatching.
The random access system of carrier aggregation system in this programme comprises above-mentioned base station and above-mentioned terminal.
Need to prove that under the situation of not conflicting, embodiment among the application and the feature among the embodiment be combination in any mutually.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to finish by program, described program can be stored in the computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (19)
1. the accidental access method of a carrier aggregation system, wherein,
The base station uses random access radio network temporary mark (RA-RNTI) indication to stride under the scene of carrier wave addressing accidental access response, described base station is one transmission Physical Downlink Control Channel signaling in the sub-district, after described terminal receives described Physical Downlink Control Channel signaling, on sub-district two, send random access guiding, receiving random access response on described sub-district one.
2. the method for claim 1 is characterized in that,
Described terminal is provided with the receive window length of accidental access response more than or equal to the receive window length under the local carrier scheduling scene, correctly receive accidental access response in the receive window length of described terminal after sending random access guiding corresponding to this terminal, judge that then random access guiding sends successfully, otherwise, judge that then random access guiding sends failure.
3. the method for claim 1 is characterized in that,
It is that the receive window length that described base station uses RA-RNTI to stride accidental access response under the scene of carrier wave addressing accidental access response adds three subframes that described terminal is provided with length of timer, when sending random access guiding, described terminal opens this timer, in timer time length, correctly receive accidental access response corresponding to this terminal, judge that then random access guiding sends successfully, otherwise, judge that then random access guiding sends failure.
4. the method for claim 1 is characterized in that,
A described base station triggering terminal adopts noncompetitive to insert at random, specifically comprise: described base station triggers terminal is provided with the random access guiding index all the time in the Physical Downlink Control Channel that the auxilliary sub-district of being striden carrier dispatching initiates to insert at random be nonzero value, and described base station sends to the parameter that described terminal is used for inserting at random and comprises random access guiding index and Random Access Channel mask index.
5. the method for claim 1 is characterized in that,
The random access resource information that terminal reports this terminal to use on the sub-district that is different from described sub-district two, and insert at random being striden on the auxilliary sub-district of carrier dispatching the resource of using described random access resource information to comprise, described random access resource information comprises one or more in the following information: random access guiding, insert time resource, the frequency resource of using at random.
6. method as claimed in claim 5 is characterized in that,
Described base station receives that terminal is after the described random access resource information of being striden the random access guiding that sends on the auxilliary sub-district of carrier dispatching and sending on the main plot, send accidental access response on the setting sub-district, described setting sub-district comprises the main plot of terminal or strides the auxilliary sub-district of the described sub-district two of carrier dispatching.
7. method as claimed in claim 5 is characterized in that,
When described terminal adopts competitive mode to insert at random, described base station detects two or more terminals and has used identical random access resource, and cancellation is carried out feedback information to terminal or notified terminal to reselect random access resource on corresponding main plot and insert at random.
8. the method for claim 1 is characterized in that,
Described base station sends accidental access response on the sub-district of receiving all participation carrier aggregation outside the sub-district of non-special-purpose random access guiding, terminal is being set receiving random access response on the sub-district, and described setting sub-district comprises the main plot of terminal or strides the auxilliary sub-district of the described sub-district two of carrier dispatching.
9. a base station comprises that base station side inserts processing module at random, wherein,
Described base station side inserts processing module at random, using random access radio network temporary mark (RA-RNTI) to stride under the scene of carrier wave addressing accidental access response, strides the Physical Downlink Control Channel signaling of the described sub-district two of carrier dispatching on sub-district one.
10. base station as claimed in claim 9 is characterized in that,
Described base station side inserts processing module at random, also being used for a triggering terminal adopts noncompetitive to insert at random, specifically comprise: triggering terminal is provided with the random access guiding index all the time in the Physical Downlink Control Channel that the auxilliary sub-district of being striden carrier dispatching initiates to insert at random be nonzero value, sends to the parameter that described terminal is used for inserting at random and comprise random access guiding index and Random Access Channel mask index.
11. base station as claimed in claim 9 is characterized in that,
Described sub-district two is auxilliary sub-district, described base station side inserts processing module at random, be used to also to receive that terminal is after random access guiding that sends on this auxilliary sub-district and the described random access resource information that sending on the main plot, send accidental access response on described sub-district one, described sub-district one comprises the main plot of terminal or strides the auxilliary sub-district of the described sub-district two of carrier dispatching.
12. base station as claimed in claim 9 is characterized in that,
Described base station side inserts processing module at random, also be used for when terminal adopts competitive mode to insert at random, detect two or more terminals and used identical random access resource, cancellation is carried out feedback information to terminal or is notified terminal to reselect random access resource on corresponding main plot and insert at random.
13. base station as claimed in claim 9 is characterized in that,
Described base station side inserts processing module at random, also is used for sending accidental access response on the sub-district of receiving all participation carrier aggregation outside the sub-district of non-special-purpose random access guiding.
14. a terminal comprises that end side inserts processing module at random, it is characterized in that,
Described end side inserts processing module at random, be used to receive described Physical Downlink Control Channel signaling after, on sub-district two, send random access guiding, receiving random access response on sub-district one.
15. terminal as claimed in claim 14 is characterized in that,
Described end side inserts processing module at random, also be used to be provided with the receive window length of accidental access response more than or equal to the receive window length under the local carrier scheduling scene, correctly receive accidental access response in the receive window length after sending random access guiding corresponding to this terminal, judge that then random access guiding sends successfully, otherwise, judge that then random access guiding sends failure.
16. terminal as claimed in claim 14 is characterized in that,
Described end side inserts processing module at random, also be used to be provided with length of timer and be the receive window length of using RA-RNTI to stride accidental access response under the scene of carrier wave addressing accidental access response in described base station and add three subframes, when sending random access guiding, described terminal opens this timer, in timer time length, correctly receive accidental access response corresponding to this terminal, judge that then random access guiding sends successfully, otherwise, judge that then random access guiding sends failure.
17. terminal as claimed in claim 14 is characterized in that,
Described end side inserts processing module at random, also be used on the sub-district that is different from sub-district two, reporting the random access resource information of this terminal use, and insert at random being striden on the auxilliary sub-district of carrier dispatching the resource of using described random access resource information to comprise, described random access resource information comprises one or more in the following information: random access guiding, insert time resource, the frequency resource of using at random.
18. terminal as claimed in claim 14 is characterized in that,
Described end side inserts processing module at random, also is used for setting receiving random access response on the sub-district, and described setting sub-district comprises the main plot of terminal or strides the auxilliary sub-district of the described sub-district two of carrier dispatching.
19. the random access system of a carrier aggregation system comprises claim 9,10,11,12,13 described base stations, and claim 14,15,16,17 or 18 described terminals.
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