CN102227939A - Uplink synchronization method, base station and user equipment - Google Patents
Uplink synchronization method, base station and user equipment Download PDFInfo
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- CN102227939A CN102227939A CN2009801464585A CN200980146458A CN102227939A CN 102227939 A CN102227939 A CN 102227939A CN 2009801464585 A CN2009801464585 A CN 2009801464585A CN 200980146458 A CN200980146458 A CN 200980146458A CN 102227939 A CN102227939 A CN 102227939A
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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
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface
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Abstract
An uplink synchronization method, a base station and a user equipment are disclosed in the present invention. The uplink synchronization method includes: transmitting a random access preamble to a base station on a first component carrier; receiving a contention resolution message or a connection reestablishment message of radio resource control protocol, at the same time, acquiring uplink bandwidth allocation information; according to the indication of said uplink bandwidth allocation information, determining a component carrier needed to be performed synchronization by a user equipment and the bandwidth resource corresponding to said component carrier, wherein the bandwidth resource corresponding to said component carrier is used for the user equipment to transmit a random access preamble on said component carrier; transmitting a random access preamble to the base station on the bandwidth resource corresponding to said component carrier; receiving a timing advance command from the base station, and according to the indication of said timing advance command, acquiring the timing advance value on said component carrier.Using the above solution can save resources as much as possible, and at the same time, reduce the time delay of uplink synchronization in the user equipment.
Description
A kind of uplink synchronisation method, base station and user equipment technical field
The present invention relates to communication technical field, more particularly to a kind of uplink synchronisation method, base station and user equipment.
Background technology
In existing LTE (Long Term Evolution, Long Term Evolution) in technology, when UE falls chain or switched between eNB, UE can use the mode of Stochastic accessing to obtain uplink synchronous, because LTE system is a single-carrier system, i.e. only one of which component carrier, so UE is when falling chain or switching, can obtain uplink synchronous by a random access procedure.
In order to meet the requirement of IMT-Advanced (IMT-Advanced), support to be up to 1G peak data rate, 3GPP LTE- ADVANCED (LTE evolution versions）System has agreed to carrier convergence at present（CA, Carrier Aggregation) technology as its extend system bandwidth method.The main thought of carrier convergence is exactly by multiple component carriers（CC, Component Carrier) carrier wave for being higher than 20MHz is pooled, to support the defeated rate of high-speed data.For example, the downlink bandwidth of system can be formed by 5 20MHz component carrier convergence.
For multicarrier system, under application scenes, UE (User Equipment, user equipment）It is that can not use identical TA (Timing Advance, timing advance on the multiple component carriers used）Value.For example, when base station is in different repeaters（Repeater different component carriers are configured with), or the component carrier of different frequency have passed through different scattering paths, or UE using two different component carriers and the access point communication of two non-cooperating when, the TA of UE multiple component carriers can difference.Under some other scene, it is equally possible to which different component carriers occur has a case that different TA values, herein no longer --- enumerate.When UE is current in service eNB (eNodeB, base station）On multiple component carriers for using when all occurring step-out, chain can be fallen between UE and service eNB, how UE regains uplink synchronous within the most short time with multiple CC just turns into a problem.This sunset is foretold, when UE is switched to another eNB (target eNB) from an eNB (source eNB), if be configured with for UE multiple simultaneously
CC, then UE this how to obtain uplink synchronous with the CC of these new configurations within the most short time be also the problem of needing to solve.
Inventor has found that prior art at least has problems with：Under the scene that multicarrier is applied, if UE performs Stochastic accessing one by one on multiple component carriers, larger synchronization delayed time can be brought, if UE performs multiple random access procedures simultaneously on multiple component carriers, more random access resource is consumed.
The content of the invention
The embodiment of the present invention provides a kind of uplink synchronisation method, base station and user equipment, reduces the time delay of UE uplink synchronous in the case of the random access resource that practices every conceivable frugality.
The embodiment of the present invention provides a kind of uplink synchronisation method, including：
Receive the random access lead code that user equipment is sent on the first component carrier, upstream bandwidth is sent to user equipment distribute information while sending and striving solution message or radio resource control connection re-establishment message unexpectedly, to indicate to need user equipment to perform synchronous component carrier and the corresponding bandwidth resources of the component carrier, the corresponding bandwidth resources of the component carrier send random access lead code for the user equipment on the component carrier；
The random access lead code that the user equipment is sent in the corresponding bandwidth resources of the component carrier is received, timing advance order is sent to the user equipment, the timing advance value of the component carrier is notified to the user equipment.
The embodiment of the present invention also provides a kind of uplink synchronisation method, including：
On the first component carrier random access lead code is sent to base station；
Upstream bandwidth distribution information is obtained while receiving and striving solution message or radio resource control connection re-establishment message unexpectedly, the instruction for distributing information according to the upstream bandwidth determines to need user equipment to perform synchronous component carrier and the corresponding bandwidth resources of the component carrier, and the corresponding bandwidth resources of the component carrier send random access lead code for the user equipment on the component carrier；
In the corresponding bandwidth resources of the component carrier random access lead code is sent to base station；The timing advance order from base station is received, described group is obtained according to the instruction of the timing advance order
Into the timing advance value of carrier wave.
The embodiment of the present invention also provides a kind of base station, including：
Information assigning unit, for receiving the random access lead code that user equipment is sent on the first component carrier, upstream bandwidth is sent to user equipment distribute information while sending and striving solution message or radio resource control connection re-establishment message unexpectedly, to indicate to need user equipment to perform synchronous component carrier and the corresponding bandwidth resources of the component carrier, the corresponding bandwidth resources of the component carrier send random access lead code for the user equipment on the component carrier；
Timing indicating member, for receiving the random access lead code that the user equipment is sent in the corresponding bandwidth resources of the component carrier, timing advance order is sent to the user equipment, the timing advance value of the component carrier is notified to the user equipment.
The embodiment of the present invention also provides a kind of user equipment, including：
First transmitting element, for sending random access lead code to base station on the first component carrier；Information acquisition unit, for obtaining upstream bandwidth distribution information while receiving and striving solution message or radio resource control connection re-establishment message unexpectedly, the instruction for distributing information according to the upstream bandwidth determines to need user equipment to perform synchronous component carrier and the corresponding bandwidth resources of the component carrier, and the corresponding bandwidth resources of the component carrier send random access lead code for the user equipment on the component carrier；Second transmitting element, for sending random access lead code to base station in the corresponding bandwidth resources of the component carrier；
Timing receipt unit, for receiving the timing advance order from base station, the timing advance value of the component carrier is obtained according to the instruction of the timing advance order.
From such scheme, the embodiment of the present invention receives the random access lead code that user equipment is sent on the first component carrier, upstream bandwidth distribution information is sent while sending and striving solution message or radio resource control connection re-establishment message unexpectedly, user equipment is needed to perform synchronous component carrier and correspondence resource notification user equipment, user equipment is enabled to send random access lead code using the resource, and obtain the timing advance value for the component carrier for needing synchronization, it is synchronous to be realized on synchronous component carrier is needed, without use
Family equipment performs random access procedure one by one for each component carrier, can reduce the uplink synchronous time delay of user equipment in the case of the random access resource that practices every conceivable frugality.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of uplink synchronisation method provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of another uplink synchronisation method provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of another uplink synchronisation method provided in an embodiment of the present invention；
Fig. 4 a are a kind of schematic diagram of the content of upstream bandwidth assignment messages provided in an embodiment of the present invention；Fig. 4 b are the schematic diagram of the content of another upstream bandwidth assignment messages provided in an embodiment of the present invention；Fig. 5 is the schematic diagram of another uplink synchronisation method provided in an embodiment of the present invention；
Fig. 6 is the schematic diagram of another uplink synchronisation method provided in an embodiment of the present invention；
Fig. 7 is a kind of schematic diagram of base station equipment provided in an embodiment of the present invention；
Fig. 8 is a kind of schematic diagram of user equipment provided in an embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present invention is described in detail.It should be noted that following examples are only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment of the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
Fig. 1 is a kind of schematic diagram of uplink synchronisation method provided in an embodiment of the present invention, and methods described includes：
S11 :Receive the random access lead code that user equipment is sent on the first component carrier, upstream bandwidth is sent to user equipment distribute information while sending and striving solution message or radio resource control connection re-establishment message unexpectedly, to indicate to need user equipment to perform synchronous component carrier and the corresponding bandwidth resources of the component carrier, the corresponding bandwidth resources of the component carrier send random access lead code for the user equipment on the component carrier；
S12:Receive that the user equipment sends in the corresponding bandwidth resources of the component carrier random connects
Enter lead code, send timing advance order to the user equipment, the timing advance value of the component carrier is notified to the user equipment.
In the present embodiment, base station receives the random access lead code that user equipment is sent on the first component carrier, upstream bandwidth is sent to user equipment distribute information while sending and striving solution message or radio resource control connection re-establishment message unexpectedly, to indicate to need user equipment to perform synchronous component carrier and corresponding bandwidth resources, the random access lead code that user equipment is sent in the bandwidth resources, after the random access lead code that user equipment is sent is received, transmittable timing advance order causes user equipment to result in the timing advance value of the synchronous component carrier of needs, user equipment is conducive to need to perform uplink synchronous on synchronous component carrier described.The component carrier for needing user equipment to perform synchronization can have one or more.The present embodiment user equipment that is particularly suitable for use in needs to perform the different scene of timing advance value of multiple component carriers of access, first component carrier of the present embodiment be user equipment to base station equipment initially carry out Stochastic accessing when a certain component carrier, can be the main component carrier of user equipment（Anchor CC), the main component carrier can be main component carrier of the user equipment before service eNB falls chain（This main component carrier is considered as a specific cell, or referred to as serving cell）, or the main component carrier that user equipment is indicated when being switched to target BS in switching command（This main component carrier is considered as a specific cell, or referred to as serving cell）., it is necessary to perform Stochastic accessing when user equipment falls chain or is switched to current base station, lead code is sent using first component carrier.When the timing advance value of the multiple component carriers of user equipment is different, if individually performing access procedure on other component carriers different from the TA values of the first component carrier, the synchronous time delay of user equipment will be increased and more random access resources are consumed, component carrier and correspondence bandwidth resources notice UE that now base station can will need UE to synchronize, so that UE sends lead code using respective bandwidth resource on these component carriers, and receive the lead code that UE is sent in the resource, to calculate the corresponding timing advance value of the component carrier according to the correlation preamble of each component carrier code, and by timing advance order by the timing advance value notifying user equipment calculated, it is easy to user equipment to perform the timing adjustment of correspondence component carrier according to each timing advance value, random access procedure is performed one by one for each component carrier without user equipment, can be in the random access resource that practices every conceivable frugality
In the case of reduce user equipment uplink synchronous time delay.It is described to need user to perform synchronous component carrier to have multiple, can be different from the first component carrier TA values other component carriers in the multiple component carriers of user equipment.It is appreciated that, it can also be that base station is the newly assigned component carrier of user equipment to need user to perform synchronous component carrier, now need user equipment to perform subsequent synchronization processes on newly assigned component carrier, be the equal of to have carried out the replacing that user equipment constitutes carrier wave.
In a kind of concrete application, it may include the identifier and bandwidth resources corresponding with the component carrier of at least one component carrier in the upstream bandwidth distribution information.But under application scenes, needing user equipment to perform synchronous component carrier may have multiple, some carrier waves are there may be in multiple component carriers and possess identical timing advance value, same timing advance value can be shared in other words, when the timing advance value of some component carriers can be shared, when i.e. identical, then without the relevant information of these carrier waves is included in upstream bandwidth distribution information, following implementation can be now used：Each component carrier is divided into multiple component carrier groups, the timing advance value of all component carriers in each component carrier group is equal, and now upstream bandwidth distribution information includes at least 1 component carrier group the identifier of representativeness component carrier and bandwidth resources corresponding with the representative component carrier.The component carrier group is divided according to the timing advance value of component carrier, component carrier in same component carrier group can share same timing advance value, the timing advance value of component carrier in i.e. same component carrier group is equal, the timing advance value that 1 carrier wave in this component carrier group so may be selected represents the timing advance value of all component carriers in component carrier group, the namely representative component carrier of selected component carrier.If it is appreciated that the timing advance value of a component carrier is different from other component carriers, its own also may make up a group, that is to say, that the component carrier quantity in each component carrier group is not fixed, can be any positive integer.Pass through the packet scheme, other component carriers in this component carrier group can be replaced with a representative component carrier, only distributed by a component carrier in upstream bandwidth and the corresponding bandwidth resources of all component carriers in component carrier group are indicated in information, cylinder upstream bandwidth distribution information.
It is described to may include to user equipment transmission upstream bandwidth distribution information in a kind of concrete application：Upstream bandwidth distribution information is carried and solves message or radio resource control connection re-establishment and disappears striving unexpectedly
The user equipment is sent in breath.The transmission in other message is carried by distributing information by upstream bandwidth, without sending single upstream bandwidth distribution information, extra signaling consumption can be saved.
Yet further, methods described, which may also include to work as, needs user equipment to perform main component carrier（The main component carrier is considered as specific a cell, referred to as serving cell）During change, new main component carrier or serving cell is switched to using solution message, radio resource control connection re-establishment message or self-defined message instruction user equipment is striven unexpectedly.Here, so-called main component carrier or serving cell are characterised by, it provides the input parameter for producing encryption and tegrity protection key for user equipment.Because the first component carrier that user equipment is sent can be the former main component carrier of user equipment, if former main component carrier or serving cell are their own selections, base station can be modified to the selection of user equipment, i.e. instruction user equipment changing serving cell or main component carrier.Moreover it can be for the newly assigned carrier wave of user equipment that user equipment, which needs to perform synchronous component carrier, the respective service cell of newly assigned carrier wave may be different from the serving cell before user equipment, therefore when performing synchronous component carrier required for notifying user equipment, it is also desirable to which notifying user equipment is switched on new respective cell.Former main component carrier herein is that for the component carrier for needing to change, its title is not to texture in fact into restriction.
Fig. 2 is the schematic diagram of another uplink synchronisation method provided in an embodiment of the present invention, and methods described includes：
S21 :On the first component carrier random access lead code is sent to base station；
S22:Upstream bandwidth distribution information is obtained while receiving and striving solution message or radio resource control connection re-establishment message unexpectedly, the instruction for distributing information according to the upstream bandwidth determines to need user equipment to perform synchronous component carrier and the corresponding bandwidth resources of the component carrier, and the corresponding bandwidth resources of the component carrier send random access lead code for the user equipment on the component carrier；
S23：In the corresponding bandwidth resources of the component carrier random access lead code is sent to base station； S24:The timing advance order from base station is received, the timing advance value of the component carrier is obtained according to the instruction of the timing advance order.
In the present embodiment, user equipment sends random access lead code on the first component carrier to base station, connects
Receive upstream bandwidth distribution information, random access lead code is sent in respective resources using the instruction of described information, so that user equipment can obtain the timing advance order from base station, so as to obtain the timing advance value that it needs to perform synchronous component carrier, so as to be conducive to user equipment to perform the timing adjustment of correspondence carrier wave according to each timing advance value, the present embodiment user equipment that is particularly suitable for use in needs the different scene of the timing advance value for performing synchronous multiple component carriers, so random access procedure is performed one by one for each component carrier without user equipment, user equipment uplink synchronous time delay can be reduced in the case of the random access resource that practices every conceivable frugality.
A kind of in the specific implementation, the acquisition upstream bandwidth distribution information may include：Solution message or radio resource control connection re-establishment message are striven in reception unexpectedly, are obtained to carry and are distributed information in the upstream bandwidth striven unexpectedly in solution message or radio resource control connection re-establishment message.Upstream bandwidth distribution information can be carried and sent in other message by base station herein, without sending single upstream bandwidth distribution information, can save extra signaling consumption.
In a kind of concrete application, the instruction for distributing information according to the upstream bandwidth determines that the component carrier and the corresponding bandwidth resources of the component carrier that need user equipment to perform synchronization may include：The identifier at least one component carrier that information includes is distributed according to the upstream bandwidth, it is determined that bandwidth resources corresponding with the identifier of the component carrier are used as the corresponding bandwidth resources of the component carrier.But under application scenes, some carrier waves are there may be in multiple component carriers can share identical timing advance value, when the timing advance value of some carrier waves is identical, then without the relevant information of these carrier waves is included in upstream bandwidth distribution information, following implementation can be now used：The identifier of representative component carrier at least one component carrier group that information includes is distributed according to the upstream bandwidth, it is determined that bandwidth resources corresponding with the identifier of the representative component carrier are as the corresponding bandwidth resources of component carrier in the component carrier group, the timing advance value of all component carriers is equal in the component carrier group.The above method represents the timing advance value of all component carriers in the component carrier group using the timing advance value of 1 carrier wave in some component carrier group, and user equipment is only by obtaining the timing advance value of 1 carrier wave with regard to that can grasp the timing advance value of the carrier wave in component carrier group.It is appreciated that the component carrier quantity in each component carrier group is not fixed, can appoint
Meaning positive integer.
Further, the random access lead code sent in the corresponding bandwidth resources of component carrier and the random access lead code sent on the first component carrier are same lead codes.If the lead code sent on the carrier wave for needing to perform synchronization is identical with the lead code sent first on the first component carrier, base station can be avoided to carry out blind Detecting to the lead code.Certainly the random access lead code that user equipment is sent in the corresponding bandwidth resources of each component carrier herein can also be that user equipment is randomly selected, if lead code is that user equipment is randomly selected, base station is then needed to perform blind detection process for random access lead code, so simply gently add eNB detection of complex, implementation result is not influenceed, the present embodiment is not construed as limiting to this.
Further, methods described may also include：The instruction for solving message, radio resource control connection re-establishment message or self-defined message according to striving unexpectedly is switched to new main component carrier or serving cell（The main component carrier or serving cell feature are the same）, and by the physical-layer cell indications of new main component carrier or serving cell（PCI), the other specification such as frequency is used as generation encryption and the input parameter of integrity protection security's key.User equipment would generally be attached after falling chain re-establish when; user equipment may be selected it and fall former main component carrier or serving cell before chain as the first component carrier; lead code is sent on the carrier wave; if user equipment former main component carrier or serving cell are their own selections; base station can be modified to the selection of user equipment, i.e. instruction user equipment changing serving cell or main component carrier.Moreover it can be for the newly assigned carrier wave of user equipment that user equipment, which needs to perform synchronous component carrier, the respective service cell of newly assigned carrier wave may be different from the serving cell before user equipment, therefore when performing synchronous component carrier required for notifying user equipment, notifying user equipment is also required to be switched on new respective cell, now user equipment can be according to striving solution message unexpectedly, radio resource control connection re-establishment message, or the instruction of self-defined message completes such switch, and indicated according to described by the physical-layer cell indications of new serving cell or main component carrier（PCI), the parameter such as frequency is used as generation encryption and the input parameter of integrity protection security's key so that follow-up connection re-establishment process is not influenceed by serving cell or the switching of main component carrier.
It should be noted that the present embodiment is particularly suitable for use in, user equipment is in heterogeneous networks equipment（Such as base station）
Between switching and user equipment all occur step-out on original multiple component carriers（I.e. there is chain with LA Management Room in user equipment）Scene.The base station that handover-target base station or re-established with user equipment is connected can distribute information by sending upstream bandwidth, which and these carrier waves corresponding bandwidth resources the carrier wave that instruction user equipment needs to perform uplink synchronous be so that user equipment can need to perform completion uplink synchronous process on synchronous carrier wave according to the process of the inventive method embodiment.Corresponding uplink synchronous process will be specifically described for several different application scenarios respectively for the further part of the embodiment of the present invention.
Fig. 3 is the schematic diagram of another uplink synchronisation method provided in an embodiment of the present invention, and methods described includes：
S31:UE is by random access lead code（Preamble) it is sent to service eNB.
In a kind of concrete application, when UE, which detects its multiple CC used, occurs step-out, then judge the UE and its service eNB between fall chain, the UE can perform RRC (the Radio Resource Control, radio resource control between the service eNB）Connection re-establishment process.The process that re-establishes can be first by the way that sending lead code by UE, UE can be in serving cell（Or be main CC) on select the lead code.For example, for TDD (Time Division Duplex, time division duplex）Pattern, UE can randomly choose a preamble from the CC (being also main CC) for fall to be selected as before chain serving cell and be sent to eNB;For FDD (Frequency Division Duplex, FDD）Pattern, UE can be selected as that CC pairs of serving cell before chain is fallen（Component carrier pair) (main CC is also, the description of its implication before participation embodiment）Descending CC on one preamble of random selection and eNB is sent to by corresponding up CC.Certainly, multiple CC/CC centerings that UE can also be before chain be fallen arbitrarily one CC/CC pairs of selection, is then sent to the eNB in selected CC/CC to one preamble of upper random selection.Subsequently no longer tdd mode and fdd mode are illustrated respectively, in embodiments of the present invention, such as without special description, the CC under tdd mode can both be referred to by being previously mentioned CC, can also refer to CC pairs under fdd mode.
In addition, it is necessary to which the serving cell or main CC that are referred in special instruction, the embodiment of the present invention, are the CC with following feature, i.e.,：UE is by the physical-layer cell indications of the serving cell or main CC
The parameters such as PCI, frequency are used as generation encryption and the input parameter of tegrity protection key.Therefore, serving cell and main CC here is only an address to the specific component carrier in all component carriers, not extra restriction.
S32:Service eNB and send accidental access response message to UE.
S33:UE sends RRC connection re-establishment request messages after accidental access response message is received to the service eNB.Specifically, UE C-RNTI (Cell Radio Network Temporary Identifier, Cell Radio Network Temporary Identifier/Identity, Cell-RNTI can be included in the RRC connection re-establishments request message）Identifier.
S34:Service eNB is received after the RRC connection re-establishment request messages of UE transmissions, and the C-RNTI identifiers based on UE know that the multiple CC used before the UE have occurred and that uplink loss.
S35:The multiple CC used before the UE do not have same TA values, and service eNB sends to UE and strives solution message unexpectedly（Contention resolution), and carrying upstream bandwidth assignment messages in solution message are striven unexpectedly at this.The Τ Α values of sample.If the same Τ Α values that these CC do not have, eNB can need UE to perform the bandwidth resources for sending Stochastic accessing preamble distributed on multiple CC of uplink synchronous for UE.Upstream bandwidth assignment messages during this are used to indicate that eNB is needing UE to perform the bandwidth resources for sending Stochastic accessing preamble distributed for UE on multiple CC of uplink synchronous；Unexpectedly the solution message of striving is a RACH (Random Access Channel, RACH）Message 4.The content of upstream bandwidth assignment messages can be carried and be sent to UE in solution message is striven unexpectedly by eNB as a field for striving solution message unexpectedly, solve to contain eNB in message in the bandwidth resources for needing UE to perform the transmission Stochastic accessing preamble on multiple CC of uplink synchronous for UE distribution that is, striving unexpectedly.Multiple CC that the multiple CC for needing UE to perform uplink synchronous are used before can falling chain with UE are identical；Certainly, eNB can also reconfigure other CC as the multiple CC for needing UE to perform uplink synchronous for UE.During sheet, eNB can include each identifier and transmission preamble corresponding with these CC uplink time/frequency source information that need to perform the CC of uplink synchronous for distributing to UE in upstream bandwidth assignment messages（It is called UL bandwidth letter
Breath）.Fig. 4 a are a kind of schematic diagram of the content of upstream bandwidth assignment messages provided in an embodiment of the present invention.The content includes the identification information that UE performs multiple CC of uplink synchronous.The mark of the common n CC from CC1 to CCn is shown in this Fig. 4 a, wherein each CC has corresponding transmission preamble up (UL, Uplink) resource.Upstream bandwidth assignment messages are carried and sent in solution message is striven unexpectedly by said process, but in actual applications, also it can be transmitted upstream bandwidth assignment messages as an independent message, independent upstream bandwidth assignment messages between striving solution message unexpectedly when sending with can be without strict sequencing, and the present embodiment is not construed as limiting to this.
In a kind of concrete application, the multiple CC indicated in upstream bandwidth assignment messages can be grouped, the UE multiple CC for performing uplink synchronous are grouped according to whether that can share a TA, and the grouping information is sent to UE by broadcast or dedicated signaling.In this case, eNB only need to select a representational CC and its corresponding transmission preamble ascending resource to notify to UE in each group, UE performs the TA values that the representational CC is obtained after uplink synchronous on the representational CC, and the obtained TA values namely belong to other CC of CC group TA values with the representational CC.The information included in upstream bandwidth assignment messages can be：Need to perform the identifier of each representational CC in multiple CC of uplink synchronous and the UE uplink time/frequency source information for being used to send Stochastic accessing preamble is distributed on these representational CC.It is appreciated that being arbitrarily designated in multiple CC that the representational CC can distribute to UE by eNB from CC groups.Fig. 4 b are the schematic diagram of the content of another upstream bandwidth assignment messages provided in an embodiment of the present invention.In fig. 4b, in the presence of the mark of the common n representativeness CC from CC1 to CCn, it is different from Fig. 4 a, each representativeness CC can represent one group of CC, the TA values of whole CC in one component carrier group are identicals, now, it is only necessary to which distribution sends preamble bandwidth resources on representational CC.
Unexpectedly the solution message and upstream bandwidth assignment messages of striving can be sent by diversified forms.In a kind of concrete application, the form of the message can preferred be MAC (Media Access Control, medium education）Control PDU (Protocol Data Unit, protocol Data Unit）, can also be in addition RRC information or physical layer message, herein not as restriction.
S36:The service eNB sends RRC connection re-establishment message to UE.
S37：In the bandwidth resources that UE is indicated in the upstream bandwidth assignment messages preamble is sent to service eNB.
UE strives the bandwidth resources that solve to know after message and upstream bandwidth assignment messages and indicated in upstream bandwidth assignment messages unexpectedly receive eNB transmissions, and UE can randomly choose a preamble and service eNB is sent in the bandwidth resources;In another implementation, the Stochastic accessing preamble sent in process S31 also can be sent to eNB by UE in the bandwidth resources.If limiting the preamble that UE uses the same preamble sent in process S31 to be sent as this, eNB blind Detectings preamble complexity can be reduced.
S38:UE sends RRC connection re-establishment completion messages to the eNB.
S39:The service eNB sends TA adjustment to UE and ordered.Specifically, the TA values for needing to adjust required for multiple CC of uplink synchronous can be included in the TA adjustment orders that eNB is sent to UE.
It should be noted that not having strict ordinal relation between process S36, S37, S38 and S39, those skilled in the art can carry out accommodation according to practical application to the flow of the present embodiment.
In S31, serving cell/main CC when service eNB can fall chain when UE performs RRC connection re-establishments to UE is modified.UE is when RRC connection re-establishments are performed, serving cell/main CC can voluntarily be selected, if serving cell/main CC is voluntarily selected by UE, service eNB can be also modified to serving cell/main CC of UE selection, in these cases, service eNB can increase serving cell when solution message or RRC connection re-establishment message are striven in transmission unexpectedly in the message（Serving Cell)/main CC changes and indicates, indicate that UE should replace with former serving cell indicated new serving cell, that is, now service eNB needs that the identification information that eNB is serving cell/main CC that UE is reselected is notified into UE in solution message or RRC connection re-establishment message is striven unexpectedly.Or, eNB can also notify UE to change serving cell/main CC with single self-defined message, and the single message can be referred to as serving cell/main CC and change message.Correspondingly, when UE, which is received, strives solution message either RRC connection re-establishments message unexpectedly or when UE receives serving cell/main CC and changes message, the new serving cell/main CC indicated in these message ginseng can be used in UE
Number, the parameter may include new demand servicing cell/main CC PCI (physical-layer cell identifier) or frequency etc., and these parameters can be used as generation encryption and the input parameter of integrity protection security's key so that follow-up
RRC connections foundation and RRC connections, which are set up complete process and do not changed by serving cell, to be influenceed.
Above-described embodiment is directed to the scene that UE under carrier convergence scene falls chain, when UE, which detects its multiple CC used, occurs step-out, preamble can be sent to eNB to re-establish to be attached, eNB is needed to perform on synchronous CC for UE distribution resources in UE, so that UE sends preamble to perform synchronizing process in respective resources, random access procedure is performed one by one for each CC without UE, can reduce the time delay of UE uplink synchronous in the case of the resource that practices every conceivable frugality.In the present embodiment, upstream bandwidth assignment messages are carried to strive unexpectedly in solution message and sent, and without sending single upstream bandwidth assignment messages, can save part resource.It is appreciated that the former CC that UE needs the CC for performing synchronization to be used before falling chain with UE can be with identical or difference.
Fig. 5 is the schematic diagram of another uplink synchronisation method provided in an embodiment of the present invention, and methods described includes：
S51 :Stochastic accessing Preamble is sent to service eNB by UE.Specifically, UE can service eNB to it and send a Preamble to initiate RRC connection re-establishment processes when detecting its multiple CC used and occurring step-out.
S52:Service eNB and send accidental access response message to UE.
S53:UE sends RRC connection re-establishment request messages to the service eNB.UE C-RNTI identifiers are included in the RRC connection re-establishments request message.
S54:Service eNB sends to UE and strives solution message unexpectedly.
S55:The UE included in the service eNB RRC connection re-establishment request messages that UE is sent before C-RNTI identifiers can know that the multiple CC used before the UE have occurred and that uplink loss.
S56:The service eNB sends RRC connection re-establishment message to UE, and upstream bandwidth assignment messages are carried in the RRC connection re-establishments message.
Value, if the same TA values that these CC do not have, then eNB can need the bandwidth resources for the UE transmission Stochastic accessing preamble distributed on multiple CC of execution uplink synchronous in UE, and use upstream bandwidth to distribute information instruction the bandwidth resources for sending Stochastic accessing preamble on the multiple CC for needing UE to perform uplink synchronous for UE distribution.During sheet, one field of the content that eNB can be included upstream bandwidth assignment messages as RRC connection re-establishment message is sent, that is, UE is can be included in RRC connection re-establishment message performs the bandwidth resources for sending Stochastic accessing preamble distributed on multiple CC of uplink synchronous for UE.It is identical or different that the multiple CC for needing UE to perform uplink synchronous can fall the multiple CC used before chain with UE.Similar with embodiment before, eNB can include each identifier and transmission preamble corresponding with these CC uplink time/frequency source information that need to perform the CC of uplink synchronous for distributing to UE in upstream bandwidth assignment messages；In a kind of concrete application, the multiple CC indicated in upstream bandwidth assignment messages can be grouped, multiple CC that UE will be needed to perform uplink synchronous are grouped according to whether that can share a TA, and the grouping information is sent to UE by broadcast or dedicated signaling, for the content of the by the agency of of embodiment before, repeated description is not done herein.It is appreciated that during sheet, can be transmitted upstream bandwidth assignment messages as an independent message, rather than carry in RRC connection re-establishment message.Strict transmission order is can be without between independent upstream bandwidth assignment messages and RRC connection re-establishment message.
S57:It can be randomly choosed in the bandwidth resources that UE is indicated in the upstream bandwidth assignment messages to preamble described in service eNB transmissions preamble by UE；Or, the preamble that the preamble sent in process S51 can be sent as this, to reduce complexity during eNB blind Detecting preamble.
S58:UE sends RRC connection re-establishment completion messages to the eNB.
S59:The service eNB sends TA adjustment to UE and ordered.Specifically, the TA values for needing to adjust required for multiple CC of uplink synchronous can be included in the TA adjustment orders that eNB is sent to UE.
It should be noted that there is no strict ordinal relation between process S57, S58 and S59.And similar with embodiment before, eNB is serviced in the present embodiment to increase serving cell in the message when solution message or RRC connection re-establishment message are striven in transmission unexpectedly（Serving Cell)/main CC changes and indicates,
Indicate that UE should replace with former serving cell/main CC indicated new serving cell/main CC, the present embodiment is repeated no more to this.
Above-described embodiment is directed to the scene that UE under carrier convergence scene falls chain, and the upstream bandwidth assignment messages are carried in RRC connection re-establishment message and sent, and without sending single upstream bandwidth assignment messages, can save part resource.
It should be noted that in implementation described in above-mentioned Fig. 3 and Fig. 5, upstream bandwidth assignment messages are to carry striving solution message unexpectedly or carrying and sent together in S56 RRC connection re-establishment message in process S35.Or, upstream bandwidth assignment messages can strive as independent message and unexpectedly solution message or RRC connection re-establishment message sends jointly to UE parallel, and transmitted in parallel described here is namely sent in the same time.In addition, upstream bandwidth assignment messages can also solve any time between message and RRC connection re-establishments message the two processes and send sending to strive unexpectedly as single message, and the present embodiment is to this without limiting.
Fig. 6 is the schematic diagram of another uplink synchronisation method provided in an embodiment of the present invention, and methods described includes：
S61:UE receives the switching command message from source eNB or the RRC connection reconfiguration messages with mobile management field.
S62：Stochastic accessing Preamble is sent to target eNB by UE.
S63:Target eNB sends accidental access response message to UE.
S64:UE sends handoff completion message to the target eNB or RRC connections reconfigure completion message.Handoff completion message or the RRC connection, which is reconfigured, can include the C-RNTI identifiers of the UE in completion message.
S65:Target eNB receives the handoff completion message or RRC connections are reconfigured after completion message, instruction in the handoff completion message or RRC connection re-establishment completion messages determines the same TA values that the multiple CC used before the UE do not have, then target eNB sends to UE and strives solution message unexpectedly, and carries upstream bandwidth assignment messages in described strive unexpectedly in solution message.Specifically striving solution message transmitting process unexpectedly can
Embodiment before reference, is not repeated herein.It is appreciated that upstream bandwidth assignment messages can individually be sent in described strive unexpectedly outside solution message.
S66:It can be randomly choosed in the bandwidth resources that UE is indicated in the upstream bandwidth assignment messages to preamble described in target eNB transmissions preamble by UE；Or, the preamble that the preamble sent in process S62 can be sent as this, to reduce complexity during target eNB blind Detecting preamble.
S67:The target eNB sends TA adjustment to UE and ordered.Specifically, the TA values for needing to adjust required for multiple CC of uplink synchronous can be included in the TA adjustment orders that target eNB is sent to UE.
It should be noted that also without strict ordinal relation between process S66 and S67.
Above-described embodiment is directed to the scene that UE switches under carrier convergence scene, reconfigured when UE needs to switch and sends preamble to target eNB with being attached, target eNB is needed to perform on synchronous CC for UE distribution resources in UE, so that UE sends preamble to complete synchronizing process in target eNB in respective resources, random access procedure is performed one by one for each CC without UE, can reduce the time delay of UE uplink synchronous in the case of the resource that practices every conceivable frugality.
Fig. 7 is a kind of schematic diagram of base station equipment provided in an embodiment of the present invention, and the base station includes：Information assigning unit 71, for receiving the random access lead code that user equipment is sent on the first component carrier, upstream bandwidth is sent to user equipment distribute information while sending and striving solution message or radio resource control connection re-establishment message unexpectedly, to indicate to need user equipment to perform synchronous component carrier and the corresponding bandwidth resources of the component carrier, the corresponding bandwidth resources of the component carrier send random access lead code for the user equipment on the component carrier；
Timing indicating member 72, for receiving the random access lead code that the user equipment is sent in the corresponding bandwidth resources of the component carrier, timing advance order is sent to the user equipment, the timing advance value of the component carrier is notified to the user equipment.
The base station equipment may indicate that user equipment needs to perform the CC and respective resources of synchronization, user equipment is set to initiate subsequent synchronization processes, random access procedure is performed one by one for each component carrier without user equipment, can reduce the time delay of user equipment uplink synchronous in the case of the resource that practices every conceivable frugality.
Further, described information allocation unit 71 may include：Sending module is carried, solves to be sent to the user equipment in message or radio resource control connection re-establishment message striving unexpectedly for upstream bandwidth distribution information to be carried.By the carrying transmission process, upstream bandwidth distribution information is sent without independent signaling, part signaling consumption can be saved.
Further, the base station may also include：Switching notice unit；When needing user equipment to perform the change of serving cell/main CC, the switching notice unit is used to be switched to new serving cell/main cc using striving solution message, radio resource control connection re-establishment message or self-defined message instruction user equipment unexpectedly.
Fig. 8 is a kind of schematic diagram of user equipment provided in an embodiment of the present invention, and the user equipment includes：First transmitting element 81, for sending random access lead code to base station on the first component carrier；Information acquisition unit 82, for obtaining upstream bandwidth distribution information while receiving and striving solution message or radio resource control connection re-establishment message unexpectedly, the instruction for distributing information according to the upstream bandwidth determines to need user equipment to perform synchronous component carrier and the corresponding bandwidth resources of the component carrier, and the corresponding bandwidth resources of the component carrier send random access lead code for the user equipment on the component carrier；
Second transmitting element 83, for sending random access lead code to base station in the corresponding bandwidth resources of the component carrier；
Timing receipt unit 84, for receiving the timing advance order from base station, the timing advance value of the component carrier is obtained according to the instruction of the timing advance order.
The user equipment is when its multiple component carrier occurs step-out or needs to perform switching, it can deploy synchronous on synchronous CC by obtaining upstream bandwidth and distributing information and performed in needs, independent uplink synchronous flow need not be performed for each CC, reduces the time delay of user equipment uplink synchronous in the case of the resource that practices every conceivable frugality.
Further, described information acquiring unit 82 may include：Information receiving module, solution message or radio resource control connection re-establishment message are striven for receiving unexpectedly, are obtained to carry and are striven solution message unexpectedly described
Or the upstream bandwidth distribution information in radio resource control connection re-establishment message.
Further, described information acquiring unit 82 may also include：First resource determining module, the identifier for distributing at least one component carrier that information includes according to the upstream bandwidth, it is determined that bandwidth resources corresponding with the identifier of the component carrier are used as the corresponding bandwidth resources of the component carrier.Or, described information acquiring unit 82 may also include：Secondary resource determining module, identifier for distributing representative component carrier at least one component carrier group that information includes according to the upstream bandwidth, it is determined that bandwidth resources corresponding with the identifier of the representative component carrier are as the corresponding bandwidth resources of component carrier in the component carrier group, the timing advance value of all component carriers is equal in the component carrier group.
Yet further, second transmitting element 83 may include：Sending module is selected, for selecting the random access lead code that first receiving unit is sent on the first component carrier as the random access lead code sent in the corresponding bandwidth resources of the component carrier.If the lead code sent on the synchronous carrier wave of user equipment is needed is identical with the lead code sent on the first component carrier, it is avoided that the lead code that base station is sent to user equipment carries out blind Detecting.
Further, the user equipment may also include：Change execution unit; for solving message according to striving unexpectedly of receiving, instructions of radio resource control connection re-establishment message or self-defined message is switched to new serving cell/main CC, and the parameter such as physical-layer cell indications, the frequency using new serving cell/main CC be used as generation encrypt and integrity protection security's key input parameter.
It is appreciated that flow of the base station provided in an embodiment of the present invention with user equipment before executable in embodiment of the method, reaches the effect for reducing user equipment uplink synchronous time delay in the case of the resource that practices every conceivable frugality.
One of ordinary skill in the art will appreciate that all or part of flow in above method embodiment, computer program is can be by instruct related hardware completion, described program can be stored in a computer read/write memory medium, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic disc, CD, read-only memory（Read-Only Memory, ROM) or the random person of depositing oneself recall body (Random Access Memory, RAM) etc..
Described above is only the preferred embodiment of the present invention, it is noted that for the common of the art
For technical staff, under the premise without departing from the principles of the invention, above-described embodiment can also make some improvement and modification, and these improvement and modification also should be regarded as protection scope of the present invention.
Claims (1)
- Claim1st, a kind of uplink synchronisation method, it is characterised in that including：Receive the random access lead code that user equipment is sent on the first component carrier, upstream bandwidth is sent to user equipment distribute information while sending and striving solution message or radio resource control connection re-establishment message unexpectedly, to indicate to need user equipment to perform synchronous component carrier and the corresponding bandwidth resources of the component carrier, the corresponding bandwidth resources of the component carrier send random access lead code for the user equipment on the component carrier；The random access lead code that the user equipment is sent in the corresponding bandwidth resources of the component carrier is received, timing advance order is sent to the user equipment, the timing advance value of the component carrier is notified to the user equipment.2nd, according to the method described in claim 1, it is characterised in thatThe upstream bandwidth distribution information includes：The identifier of at least one component carrier and bandwidth resources corresponding with the component carrier；OrThe upstream bandwidth distribution information includes：The timing advance value of all component carriers at least one component carrier group in the identifier of representative component carrier and bandwidth resources corresponding with the representative component carrier, the component carrier group is equal.3rd, according to the method described in claim 1, it is characterised in that described to may include while sending and striving solution message or radio resource control connection re-establishment message unexpectedly to user equipment transmission upstream bandwidth distribution information：Upstream bandwidth distribution information is carried and is sent to the user equipment in described strive unexpectedly in solution message or radio resource control connection re-establishment message.4th, the method according to any one of claim 1-3, it is characterized in that, when needing user equipment to perform serving cell/main component carrier change, the renewal that message, radio resource control connection re-establishment message or self-defined message instruction user equipment perform serving cell/main component carrier is solved using striving unexpectedly.5th, a kind of uplink synchronisation method, it is characterised in that including： On the first component carrier random access lead code is sent to base station；Upstream bandwidth is obtained while receiving and striving solution message or radio resource control connection re-establishment message unexpectedly and distributes information, and the instruction for distributing information according to the upstream bandwidth determines the component carrier and the corresponding bandwidth resources of the component carrier for needing user equipment to perform synchronization；In the corresponding bandwidth resources of the component carrier random access lead code is sent to base station；The timing advance order from base station is received, the timing advance value of the component carrier is obtained according to the instruction of the timing advance order.6th, method according to claim 5, it is characterised in that the upstream bandwidth distribution information that obtained while solution message or radio resource control connection re-establishment message are striven in reception unexpectedly may include：Solution message or radio resource control connection re-establishment message are striven in reception unexpectedly, are obtained to carry and are distributed information in the upstream bandwidth striven unexpectedly in solution message or radio resource control connection re-establishment message.7th, method according to claim 5, it is characterised in that the instruction for distributing information according to the upstream bandwidth determines that the component carrier and the corresponding bandwidth resources of the component carrier that need user equipment to perform synchronization include：The identifier at least one component carrier that information includes is distributed according to the upstream bandwidth, it is determined that bandwidth resources corresponding with the identifier of the component carrier are used as the corresponding bandwidth resources of the component carrier；Or the identifier of representative component carrier at least 1 component carrier group that information includes is distributed according to the upstream bandwidth, it is determined that bandwidth resources corresponding with the identifier of the representative component carrier are as the corresponding bandwidth resources of component carrier in the component carrier group, the timing advance value of all component carriers is equal in the component carrier group.8th, method according to claim 5, it is characterised in that the random access lead code sent in the corresponding bandwidth resources of component carrier and the random access lead code sent on the first component carrier are same lead codes.9th, the method according to any one of claim 5-8, it is characterised in that also include：Solution of striving unexpectedly according to receiving or is made by oneself message, radio resource control connection re-establishment message The instruction of adopted message performs the input parameter that the parameters such as the renewal of serving cell/main component carrier, and physical-layer cell indications, frequency using new serving cell/main component carrier are used as generation encryption and integrity protection security's key.10th, a kind of base station, it is characterised in that including：Information assigning unit, for receiving the random access lead code that user equipment is sent on the first component carrier, upstream bandwidth is sent to user equipment distribute information while sending and striving solution message or radio resource control connection re-establishment message unexpectedly, to indicate to need user equipment to perform synchronous component carrier and the corresponding bandwidth resources of the component carrier, the corresponding bandwidth resources of the component carrier send random access lead code for the user equipment on the component carrier；Timing indicating member, for receiving the random access lead code that the user equipment is sent in the corresponding bandwidth resources of the component carrier, timing advance order is sent to the user equipment, the timing advance value of the component carrier is notified to the user equipment.11st, base station according to claim 10, it is characterised in that described information allocation unit includes：Sending module is carried, solves to be sent to the user equipment in message or radio resource control connection re-establishment message striving unexpectedly for upstream bandwidth distribution information to be carried.12nd, a kind of user equipment, it is characterised in that including：First transmitting element, for sending random access lead code to base station on the first component carrier；Information acquisition unit, for obtaining upstream bandwidth distribution information while receiving and striving solution message or radio resource control connection re-establishment message unexpectedly, the instruction for distributing information according to the upstream bandwidth determines to need user equipment to perform synchronous component carrier and the corresponding bandwidth resources of the component carrier, and the corresponding bandwidth resources of the component carrier send random access lead code for the user equipment on the component carrier；Second transmitting element, for sending random access lead code to base station in the corresponding bandwidth resources of the component carrier；Timing receipt unit, for receiving the timing advance order from base station, the timing advance value of the component carrier is obtained according to the instruction of the timing advance order. 13rd, user equipment according to claim 12, it is characterised in that described information acquiring unit includes：Information receiving module, solution message or radio resource control connection re-establishment message are striven for receiving unexpectedly, are obtained to carry and are distributed information in the upstream bandwidth striven unexpectedly in solution message or radio resource control connection re-establishment message.14th, user equipment according to claim 12, it is characterised in that described information acquiring unit includes：First resource determining module, the identifier for distributing at least 1 component carrier that information includes according to the upstream bandwidth, it is determined that bandwidth resources corresponding with the identifier of the component carrier are used as the corresponding bandwidth resources of the component carrier；Or,Described information acquiring unit includes：Secondary resource determining module, identifier for distributing representative component carrier at least one component carrier group that information includes according to the upstream bandwidth, it is determined that bandwidth resources corresponding with the identifier of the representative component carrier are as the corresponding bandwidth resources of component carrier in the component carrier group, the timing advance value of all component carriers is equal in the component carrier group.15th, user equipment according to claim 12, it is characterised in that the lead code transmitting element includes：Sending module is selected, for selecting the random access lead code that first receiving unit is sent on the first component carrier as the random access lead code sent in the corresponding bandwidth resources of the component carrier.16th, the user equipment according to any one of claim 12-15, it is characterised in that also include：Change execution unit; the input parameter of generation encryption and integrity protection security's key is used as parameters such as physical-layer cell indications, the frequency informations according to the renewal for striving the instruction execution serving cell/main component carrier for solving message, radio resource control connection re-establishment message or self-defined message unexpectedly received, and using new serving cell/main component carrier.
Applications Claiming Priority (1)
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| PCT/CN2009/074728 WO2011050535A1 (en) | 2009-10-30 | 2009-10-30 | Uplink synchronization method, base station and user equipment |
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| CN102227939A true CN102227939A (en) | 2011-10-26 |
| CN102227939B CN102227939B (en) | 2013-09-25 |
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| WO2011050535A1 (en) | 2011-05-05 |
| CN102227939B (en) | 2013-09-25 |
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