CN102227939B - Uplink synchronization method, base station and user equipment - Google Patents
Uplink synchronization method, base station and user equipment Download PDFInfo
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- CN102227939B CN102227939B CN200980146458.5A CN200980146458A CN102227939B CN 102227939 B CN102227939 B CN 102227939B CN 200980146458 A CN200980146458 A CN 200980146458A CN 102227939 B CN102227939 B CN 102227939B
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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
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
Technical field
The present invention relates to communication technical field, particularly a kind of uplink synchronisation method, base station and subscriber equipment.
Background technology
At existing LTE (Long Term Evolution, Long Term Evolution) in the technology, when UE falls chain or switches between eNB, UE can use the mode that inserts at random to obtain uplink synchronous, because the LTE system is a single-carrier system, UE namely have only one to form carrier wave, so when falling chain or switching, can obtain uplink synchronous by a random access procedure.
In order to satisfy the requirement of IMT-Advanced (senior international mobile communication), support is up to the peak data rate of 1G, (CA, Carrier Aggregation) technology has been agreed carrier wave is converged at present as the method for its expanding system bandwidth by 3GPP LTE-ADVANCED (LTE evolution version) system.The main thought that carrier wave converges is exactly that a plurality of composition carrier waves (CC, Component Carrier) are pooled a carrier wave that is higher than 20MHz, to support the defeated rate of high-speed data.For example, the downlink bandwidth of system can be converged and formed by the carrier wave of forming of 5 20MHz.
For multicarrier system, under application scenes, UE (User Equipment, subscriber equipment) is to use identical TA (Timing Advance, timing advance) value at a plurality of composition carrier waves that use.For example, when the base station has disposed different composition carrier waves at different repeater (Repeater), perhaps the composition carrier wave of different frequency has passed through different scattering paths, when perhaps UE used two different composition carrier waves to communicate by letter with two non-access points that cooperate, the TA of a plurality of composition carrier waves of UE can be different.Under some other scene, the different situations that carrier wave has different TA values of forming may appear equally, enumerate no longer one by one at this.When step-out all takes place in the current a plurality of composition carrier waves that upward use in service eNB (eNodeB, base station) of UE, can fall chain between UE and the service eNB, how UE regains uplink synchronous with a plurality of CC in the shortest time just become a problem.In addition, when UE switches to another one eNB (target eNB) from an eNB (source eNB), if simultaneously for UE has disposed a plurality of CC, so UE this how to obtain uplink synchronous with the CC of these new configurations in the shortest time also be to need the problem that solves.
The inventor finds that there is following problem at least in prior art: under the multicarrier applied scene, if UE carries out at random one by one on a plurality of composition carrier waves and inserts, then can bring bigger synchronization delayed time, if UE carries out a plurality of random access procedures simultaneously on a plurality of composition carrier waves, then consume more random access resource.
Summary of the invention
The embodiment of the invention provides a kind of uplink synchronisation method, base station and subscriber equipment, reduces the time delay of UE uplink synchronous under the situation of random access resource that practices every conceivable frugality.
The embodiment of the invention provides a kind of uplink synchronisation method, comprising:
Receive subscriber equipment and form the random access lead code that carrier wave sends first, when sending competition solution message or radio resource control connection re-establishment message, send the upstream bandwidth assignment information to subscriber equipment, need subscriber equipment to carry out synchronous composition carrier wave and described composition carrier wave corresponding bandwidth resource with indication, described composition carrier wave corresponding bandwidth resource is used for described subscriber equipment and sends random access lead code at this composition carrier wave;
Receive the random access lead code that described subscriber equipment sends in described composition carrier wave corresponding bandwidth resource, send the timing advance order to described subscriber equipment, be notified to described subscriber equipment with the timing advance value with described composition carrier wave.
The embodiment of the invention also provides a kind of uplink synchronisation method, comprising:
Form on the carrier wave to base station transmission random access lead code first;
When receiving competition solution message or radio resource control connection re-establishment message, obtain the upstream bandwidth assignment information, determine synchronous composition carrier wave and the described composition carrier wave corresponding bandwidth resource of needs subscriber equipment execution according to the indication of described upstream bandwidth assignment information, described composition carrier wave corresponding bandwidth resource is used for described subscriber equipment and sends random access lead code at this composition carrier wave;
On described composition carrier wave corresponding bandwidth resource, send random access lead code to the base station;
Reception obtains the timing advance value of described composition carrier wave from the timing advance order of base station according to the indication of described timing advance order.
The embodiment of the invention also provides a kind of base station, comprising:
The information distribution unit, be used for receiving subscriber equipment and form the random access lead code that carrier wave sends first, when sending competition solution message or radio resource control connection re-establishment message, send the upstream bandwidth assignment information to subscriber equipment, need subscriber equipment to carry out synchronous composition carrier wave and described composition carrier wave corresponding bandwidth resource with indication, described composition carrier wave corresponding bandwidth resource is used for described subscriber equipment and sends random access lead code at this composition carrier wave;
The timing indicating member, be used for receiving the random access lead code that described subscriber equipment sends in described composition carrier wave corresponding bandwidth resource, send the timing advance order to described subscriber equipment, be notified to described subscriber equipment with the timing advance value with described composition carrier wave.
The embodiment of the invention also provides a kind of subscriber equipment, comprising:
First transmitting element is used for forming on the carrier wave to base station transmission random access lead code first;
Information acquisition unit, be used for when receiving competition solution message or radio resource control connection re-establishment message, obtaining the upstream bandwidth assignment information, determine synchronous composition carrier wave and the described composition carrier wave corresponding bandwidth resource of needs subscriber equipment execution according to the indication of described upstream bandwidth assignment information, described composition carrier wave corresponding bandwidth resource is used for described subscriber equipment and sends random access lead code at this composition carrier wave;
Second transmitting element is used on described composition carrier wave corresponding bandwidth resource to base station transmission random access lead code;
Regularly receiving element is used for receiving the timing advance order from the base station, obtains the timing advance value of described composition carrier wave according to the indication of described timing advance order.
By such scheme as can be known, the embodiment of the invention receives subscriber equipment and forms the random access lead code that carrier wave sends first, transmission upstream bandwidth assignment information when sending competition to solve message or radio resource control connection re-establishment message, subscriber equipment need be carried out synchronous composition carrier wave and corresponding resource notification subscriber equipment, make subscriber equipment can utilize described resource to send random access lead code, and obtain the timing advance value that needs synchronous composition carrier wave, to realize synchronously at the synchronous composition carrier wave of needs, need not subscriber equipment and carry out random access procedure one by one at each composition carrier wave, can under the situation of random access resource that practices every conceivable frugality, reduce the uplink synchronous time delay of subscriber equipment.
Description of drawings
The schematic diagram of a kind of uplink synchronisation method that Fig. 1 provides for the embodiment of the invention;
The schematic diagram of another uplink synchronisation method that Fig. 2 provides for the embodiment of the invention;
The schematic diagram of another uplink synchronisation method that Fig. 3 provides for the embodiment of the invention;
The schematic diagram of the content of a kind of upstream bandwidth assignment messages that Fig. 4 a provides for the embodiment of the invention;
The schematic diagram of the content of another upstream bandwidth assignment messages that Fig. 4 b provides for the embodiment of the invention;
The schematic diagram of another uplink synchronisation method that Fig. 5 provides for the embodiment of the invention;
The schematic diagram of another uplink synchronisation method that Fig. 6 provides for the embodiment of the invention;
The schematic diagram of a kind of base station equipment that Fig. 7 provides for the embodiment of the invention;
The schematic diagram of a kind of subscriber equipment that Fig. 8 provides for the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present invention are described in detail.Need to prove that following examples only are the present invention's part embodiment, rather than whole embodiment.Based on the embodiment of the invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The schematic diagram of a kind of uplink synchronisation method that Fig. 1 provides for the embodiment of the invention, described method comprises:
S11: receive subscriber equipment and form the random access lead code that carrier wave sends first, when sending competition solution message or radio resource control connection re-establishment message, send the upstream bandwidth assignment information to subscriber equipment, need subscriber equipment to carry out synchronous composition carrier wave and described composition carrier wave corresponding bandwidth resource with indication, described composition carrier wave corresponding bandwidth resource is used for described subscriber equipment and sends random access lead code at this composition carrier wave;
S12: receive the random access lead code that described subscriber equipment sends in described composition carrier wave corresponding bandwidth resource, send the timing advance order to described subscriber equipment, be notified to described subscriber equipment with the timing advance value with described composition carrier wave.
In the present embodiment, the base station receives subscriber equipment and forms the random access lead code that carrier wave sends first, when sending competition solution message or radio resource control connection re-establishment message, send the upstream bandwidth assignment information to subscriber equipment, need subscriber equipment to carry out synchronous composition carrier wave and corresponding bandwidth resource with indication, make the random access lead code that subscriber equipment can send in described bandwidth resources, after receiving the random access lead code that subscriber equipment sends, can send the timing advance order and make subscriber equipment can obtain to need the timing advance value of synchronous composition carrier wave, be conducive to subscriber equipment and form carrier wave synchronously at described needs and carry out uplink synchronous.The described synchronous composition carrier wave of subscriber equipment execution that needs can have one or more.Present embodiment is particularly useful for the different scene of timing advance value that subscriber equipment need be carried out a plurality of composition carrier waves of access, it is a certain composition carrier wave of subscriber equipment when initially inserting at random to base station equipment that first of present embodiment is formed carrier wave, it can be the main carrier wave (Anchor CC) of forming of subscriber equipment, the described main carrier wave of forming can be that (this main carrier wave of forming can be regarded a specific residential quarter as to the main composition carrier wave of subscriber equipment before service eNB is fallen chain, or be referred to as Serving cell), or the master that subscriber equipment is indicated in the switching command when switching to target BS forms carrier wave (this main carrier wave of forming can be regarded a specific residential quarter as, or is referred to as Serving cell).When subscriber equipment falls chain or switches to current base station, need to carry out at random and insert, can utilize described first to form carrier wave transmission lead code.When the timing advance value of a plurality of composition carrier waves of subscriber equipment not simultaneously, if on other composition carrier wave different with the TA value of the first composition carrier wave, carry out access procedure separately, to increase the synchronous time delay of subscriber equipment and consume more random access resource, this moment, the base station can will need UE to carry out synchronous composition carrier wave and corresponding bandwidth resources notice UE, so that utilizing the respective bandwidth resource to form carrier wave at these, UE sends lead code, and receive the lead code that UE sends in described resource, in order to calculate the timing advance value of this composition carrier wave correspondence according to the correlation preamble yardage of each composition carrier wave, and by the timing advance order with the timing advance value notifying user equipment that calculates, be convenient to subscriber equipment and carry out the corresponding timing adjustment of forming carrier wave according to each timing advance value, need not subscriber equipment and carry out random access procedure one by one at each composition carrier wave, can under the situation of random access resource that practices every conceivable frugality, reduce the time delay of subscriber equipment uplink synchronous.The described user of needs carries out synchronous composition carrier wave can be had a plurality ofly, can be to form other different composition carrier wave of carrier wave TA value with first in a plurality of composition carrier waves of subscriber equipment.Be appreciated that, needing the user to carry out synchronous composition carrier wave also can be that the base station is the newly assigned composition carrier wave of subscriber equipment, need subscriber equipment to carry out subsequent synchronization processes at newly assigned composition carrier wave this moment, is the equal of the replacing of having carried out subscriber equipment composition carrier wave.
In a kind of concrete application, can comprise in the described upstream bandwidth assignment information at least 1 identifier of forming carrier wave and with this composition carrier wave corresponding bandwidth resource.But under application scenes, needing subscriber equipment to carry out synchronous composition carrier wave may have a plurality of, in a plurality of composition carrier waves, may exist some carrier waves to have identical timing advance value, can share same timing advance value in other words, when some timing advance values of forming carrier wave can be shared, when being identical, then need not the relevant information of these carrier waves all is included in the upstream bandwidth assignment information, can adopt following implementation this moment: the described carrier wave of respectively forming is divided into a plurality of composition carrier wave set, the timing advance value that in each forms carrier wave set all are formed carrier wave is equal, comprises that at least 1 is formed the identifier of representative composition carrier wave in the carrier wave set and forms the carrier wave corresponding bandwidth resource with this representativeness this moment in the described upstream bandwidth assignment information.Described composition carrier wave set is to divide according to the timing advance value of forming carrier wave, composition carrier wave in the same composition carrier wave set can be shared same timing advance value, the timing advance value that is the composition carrier wave in the same composition carrier wave set equates, can select the timing advance value of interior all the composition carrier waves of timing advance value representative composition carrier wave set of 1 carrier wave in this composition carrier wave set like this, selected composition carrier wave is the representative carrier wave of forming just.Being appreciated that himself also can constitute a group if a timing advance value of forming carrier wave is all different with other composition carrier wave, that is to say that the composition number of carriers in each composition carrier wave set is not fixed, can be any positive integer.By described grouping scheme, an available representative carrier wave of forming replaces other composition carrier wave in this composition carrier wave set, only form carrier wave by one and in the upstream bandwidth assignment information, indicate all composition carrier wave corresponding bandwidth resource in the composition carrier wave set, simplified the upstream bandwidth assignment information.
In a kind of concrete application, describedly send the upstream bandwidth assignment information to subscriber equipment and can comprise: described upstream bandwidth assignment information is carried at competition solves in message or the radio resource control connection re-establishment message and send to described subscriber equipment.Send by the upstream bandwidth assignment information is carried in other message, need not to send independent upstream bandwidth assignment information, can save extra signaling consumption.
Again further, described method can comprise that also (this master forms carrier wave can regard a specific residential quarter as when needing subscriber equipment to carry out main composition carrier wave, be referred to as Serving cell) when changing, utilize competition solution message, radio resource control connection re-establishment message or self-defined message indication subscriber equipment to switch to new master and form carrier wave or Serving cell.Here, so-called main composition carrier wave or Serving cell are characterised in that it is provided for producing the input parameter of encryption and integrity protection key for subscriber equipment.Because the first composition carrier wave that subscriber equipment sends can be the former main carrier wave of forming of subscriber equipment, if being them, former main composition carrier wave or Serving cell oneself select, the base station can be changed the selection of subscriber equipment, namely indicates subscriber equipment change Serving cell or the main carrier wave of forming.It can be to be the newly assigned carrier wave of subscriber equipment that moreover subscriber equipment need be carried out synchronous composition carrier wave, the respective service residential quarter of newly assigned carrier wave may be different with the Serving cell before the subscriber equipment, therefore when the synchronous composition carrier wave of the required execution of notifying user equipment, also need notifying user equipment to switch on the new respective cell.The former main carrier wave of forming herein is for the composition carrier wave of needs change, and its title does not constitute restriction to its essence.
The schematic diagram of another uplink synchronisation method that Fig. 2 provides for the embodiment of the invention, described method comprises:
S21: form on the carrier wave to base station transmission random access lead code first;
S22: when receiving competition solution message or radio resource control connection re-establishment message, obtain the upstream bandwidth assignment information, determine synchronous composition carrier wave and the described composition carrier wave corresponding bandwidth resource of needs subscriber equipment execution according to the indication of described upstream bandwidth assignment information, described composition carrier wave corresponding bandwidth resource is used for described subscriber equipment and sends random access lead code at this composition carrier wave;
S23: on described composition carrier wave corresponding bandwidth resource, send random access lead code to the base station;
S24: receive the timing advance order from the base station, obtain the timing advance value of described composition carrier wave according to the indication of described timing advance order.
In the present embodiment, subscriber equipment is formed on the carrier wave to base station transmission random access lead code first, receive the upstream bandwidth assignment information, utilize the indication of described information to send random access lead code in respective resources, thereby make subscriber equipment can obtain timing advance order from the base station, thereby obtain the timing advance value that it need carry out synchronous composition carrier wave, thereby be conducive to subscriber equipment is carried out corresponding carrier wave according to each timing advance value timing adjustment, present embodiment is particularly useful for the different scene of timing advance value that subscriber equipment need be carried out synchronous a plurality of composition carrier waves, need not subscriber equipment like this and carry out random access procedure one by one at each composition carrier wave, can under the situation of random access resource that practices every conceivable frugality, reduce subscriber equipment uplink synchronous time delay.
In a kind of specific implementation, the described upstream bandwidth assignment information of obtaining can comprise: receive competition and solve message or radio resource control connection re-establishment message, obtain the upstream bandwidth assignment information that is carried in described competition solution message or the radio resource control connection re-establishment message.The base station can be carried at the upstream bandwidth assignment information in other message and send herein, need not to send independent upstream bandwidth assignment information, can save extra signaling consumption.
In a kind of concrete application, described indication according to described upstream bandwidth assignment information determines that synchronous composition carrier wave and the described composition carrier wave corresponding bandwidth resource of needs subscriber equipment execution can comprise: according at least 1 that comprises in the described upstream bandwidth assignment information identifier of forming carrier wave, determine with this identifier corresponding bandwidth resource of forming carrier wave as this composition carrier wave corresponding bandwidth resource.But under application scenes, in a plurality of composition carrier waves, may exist some carrier waves can share identical timing advance value, when the timing advance of some carrier waves is worth when identical, then need not the relevant information of these carrier waves all is included in the upstream bandwidth assignment information, can adopt following implementation this moment: form the representative identifier of forming carrier wave in the carrier wave set according at least 1 that comprises in the described upstream bandwidth assignment information, definite and this representativeness is formed the identifier corresponding bandwidth resource of carrier wave and is formed composition carrier wave corresponding bandwidth resource in carrier wave set as this, and the timing advance value of interior all the composition carrier waves of described composition carrier wave set equates.The timing advance value that said method uses certain to form 1 carrier wave in the carrier wave set represents the timing advance value of all composition carrier waves in this composition carrier wave set, and subscriber equipment only just can be grasped the timing advance value of forming described carrier wave in the carrier wave set by the timing advance value of obtaining 1 carrier wave.Being appreciated that each composition number of carriers of forming in carrier wave set do not fix, can be any positive integer.
Further, described random access lead code and the described random access lead code that sends at the first composition carrier wave that sends in composition carrier wave corresponding bandwidth resource is same lead code.If the lead code that sends at the synchronous carrier wave of needs execution is identical with the lead code that sends at the first composition carrier wave first, then can avoid the base station that this lead code is carried out blind Detecting.Certainly subscriber equipment also can be that subscriber equipment is selected at random at the random access lead code that each composition carrier wave corresponding bandwidth resource sends herein, if being subscriber equipment, lead code selects at random, then need the base station to carry out blind detection process at random access lead code, so just slightly increased the detection of complex of eNB, do not influence implementation result, present embodiment does not limit this.
Further; described method also can comprise: the indication that solves message, radio resource control connection re-establishment message or self-defined message according to competition switch to new main form carrier wave or Serving cell (described main form carrier wave or the Serving cell feature the same), and other parameters such as the main physical-layer cell indications (PCI) of forming carrier wave or Serving cell that will be new, frequency are as the input parameter that generates encryption and integrity protection safe key.Subscriber equipment can carry out connection reconstruction immediately usually after falling chain; subscriber equipment can select it to fall that former main before the chain formed carrier wave or Serving cell is formed carrier wave as first; send lead code at this carrier wave; if the former main composition carrier wave of subscriber equipment or Serving cell are that it is selected oneself; the base station can be changed the selection of subscriber equipment, namely indicates subscriber equipment change Serving cell or the main carrier wave of forming.It can be to be the newly assigned carrier wave of subscriber equipment that moreover subscriber equipment need be carried out synchronous composition carrier wave; the respective service residential quarter of newly assigned carrier wave may be different with the Serving cell before the subscriber equipment; therefore when the synchronous composition carrier wave of the required execution of notifying user equipment; also need notifying user equipment to switch on the new respective cell; this moment, subscriber equipment can solve message according to competition; radio resource control connection re-establishment message; or such switching is finished in the indication of self-defined message; and according to the physical-layer cell indications (PCI) of described indication with new Serving cell or main composition carrier wave; parameters such as frequency make follow-up connection re-establishment process not be subjected to Serving cell or the main influence of forming the carrier wave switching as the input parameter that generates encryption and integrity protection safe key.
Need to prove that present embodiment is particularly useful for subscriber equipment and at switching and subscriber equipment between heterogeneous networks equipment (as the base station) scene of step-out (being that chain appears falling in subscriber equipment and LA Management Room) takes place all on original a plurality of composition carrier waves.Handover-target base station or rebulid the base station that is connected with subscriber equipment can be by sending the upstream bandwidth assignment information, which and these carrier wave corresponding bandwidth resource the carrier wave that the indication subscriber equipment need be carried out uplink synchronous be, makes subscriber equipment to carry out synchronous carrier wave at needs according to the process of the inventive method embodiment and finish the uplink synchronous process.The further part of the embodiment of the invention will be specifically described corresponding uplink synchronous process at several different application scenarioss respectively.
The schematic diagram of another uplink synchronisation method that Fig. 3 provides for the embodiment of the invention, described method comprises:
S31:UE sends to service eNB with random access lead code (Preamble).
In a kind of concrete application, when UE detects its a plurality of CC that using and all step-out takes place, then judge between described UE and its service eNB and fall chain, described UE can carry out and described service eNB between RRC (Radio Resource Control, radio resource control) connection re-establishment process.The upright process of described reconstruction can at first begin by sending lead code by UE, and UE can select described lead code at Serving cell (perhaps being main CC).For example, for TDD (Time Division Duplex, time division duplex) pattern, UE can select a preamble to send to eNB from falling on the CC (also being main CC) that is selected as Serving cell before the chain at random; For FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD)) pattern, UE can select a preamble at random and send to eNB by corresponding up CC from falling on the descending CC of that CC to (Component carrier pair) (also be main CC, its implication is participated in description of embodiment before) that is selected as Serving cell before the chain.Certainly, UE also can select a CC/CC right arbitrarily from a plurality of CC/CC centerings of falling before the chain, then selected CC/CC on select a preamble to send to described eNB at random.Follow-uply no longer tdd mode and fdd mode are illustrated in embodiments of the present invention, as do not have special description respectively, the CC that mentions both can refer to CC under the tdd mode can refer to that also the CC under the fdd mode is right.
In addition; of particular note; the Serving cell of mentioning in the embodiment of the invention or main CC are the CC with following feature, that is: UE encrypts parameters such as the physical-layer cell indications PCI of this Serving cell or main CC, frequency and the input parameter of integrity protection key as generating.Therefore, the Serving cell here and main CC only are addresses to the specific composition carrier wave in all composition carrier waves, do not have extra restriction.
S32: service eNB sends accidental access response message to UE.
S33:UE sends RRC connection re-establishment request message to described service eNB after receiving accidental access response message.C-RNTI (Cell Radio Network Temporary Identifier, the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI) identifier that in described RRC connection re-establishment request message, can comprise particularly, UE.
S34: after service eNB receives the RRC connection re-establishment request message of UE transmission, know that based on the C-RNTI identifier of UE uplink loss has taken place a plurality of CC that use before this UE.
S35: a plurality of CC that use before as described UE do not have same TA value, and service eNB sends competition to UE and solves message (Contention resolution), and carry the upstream bandwidth assignment messages in this competition solution message.
In this process, those up CC that described eNB can judge UE generation uplink loss do not have same TA value.If the same TA value that these CC do not have, then eNB can insert the bandwidth resources of preamble at random in the transmission that a plurality of CC that need UE to carry out uplink synchronous distribute for UE.Upstream bandwidth assignment messages in this process is used to indicate eNB inserts preamble at random for the transmission of UE distribution at a plurality of CC that need UE to carry out uplink synchronous bandwidth resources; It is a RACH (Random Access Channel, Random Access Channel) message 4 that described competition solves message.ENB can be carried at the content of upstream bandwidth assignment messages in the competition solution message as a field of competing solution message and send to UE, that is to say that competition solves and to have comprised eNB inserts preamble at random for the transmission of UE distribution at a plurality of CC that need UE to carry out uplink synchronous bandwidth resources in the message.The described UE of needs carry out uplink synchronous a plurality of CC can to fall a plurality of CC that use before the chain identical with UE; Certainly, eNB also can reconfigure other CC as a plurality of CC of the described UE of needs execution uplink synchronous for UE.In this process, eNB can comprise each that distribute to UE in the upstream bandwidth assignment messages need carry out the identifier of CC of uplink synchronous and the uplink time information (being the UL bandwidth information again) of the transmission preamble corresponding with these CC.The schematic diagram of the content of a kind of upstream bandwidth assignment messages that Fig. 4 a provides for the embodiment of the invention.Described content comprises that UE carries out the identification information of a plurality of CC of uplink synchronous.Shown the sign that is total to n CC from CC1 to CCn in this Fig. 4 a, wherein each CC has with it up (UL, Uplink) resource of corresponding transmission preamble.Said process is carried at the upstream bandwidth assignment messages in the competition solution message and sends, but in actual applications, also can with the upstream bandwidth assignment messages as one independently message send, independently the upstream bandwidth assignment messages solves message with competition can not have strict sequencing each other when sending, present embodiment does not limit this.
In a kind of concrete application, the a plurality of CC that indicate in the upstream bandwidth assignment messages can be divided into groups, be about to a plurality of CC that UE carries out uplink synchronous and divide into groups according to whether sharing a TA, and this grouping information is sent to UE by broadcasting or dedicated signaling.In this case, eNB only needs to select in each group the ascending resource of the transmission preamble of a representational CC and correspondence thereof to be notified to UE, UE obtains the TA value of this representational CC after this representational CC carries out uplink synchronous, the TA value that this obtains just belongs to the TA value of other CC of a CC group with this representational CC.The information that comprises in the upstream bandwidth assignment messages can be: the identifier of each the representational CC among a plurality of CC of needs execution uplink synchronous and the uplink time information that transmission inserts preamble at random that is used for of distributing to UE at these representational CC.Being appreciated that described representational CC can be distributed to from CC group among a plurality of CC of UE by eNB specifies arbitrarily.The schematic diagram of the content of another upstream bandwidth assignment messages that Fig. 4 b provides for the embodiment of the invention.In Fig. 4 b, there is the sign that is total to n representative CC from CC1 to CCn, different with Fig. 4 a, each representative CC can represent one group of CC, a TA value of forming the whole CC in the carrier wave set is identical, at this moment, only needs to distribute the bandwidth resources that send preamble to get final product at representational CC.
Described competition solves message and the upstream bandwidth assignment messages can send by various ways.In a kind of concrete application, the form of described message can first-selection be MAC (Media Access Control, medium access control) control PDU (Protocol Data Unit, protocol Data Unit), also can be RRC message or physical layer message in addition, herein not as limiting.
S36: described service eNB sends RRC connection re-establishment message to UE.
Send preamble to service eNB on the bandwidth resources that S37:UE indicates in described upstream bandwidth assignment messages.
UE can be known the bandwidth resources of indicating in the upstream bandwidth assignment messages after the competition that receives the eNB transmission solves message and upstream bandwidth assignment messages, UE can select a preamble to send to service eNB in described bandwidth resources at random; In another kind of implementation, UE also can send to eNB in described bandwidth resources with the preamble of access at random that sends among the process S31.If the same preamble that sends among the restriction UE employing process S31 as the preamble of this transmission, then can reduce the complexity of eNB blind Detecting preamble.
S38:UE sends the RRC connection re-establishment to described eNB and finishes message.
S39: described service eNB sends TA to UE and adjusts order.Particularly, eNB can comprise the TA value that needs the required adjustment of a plurality of CC of uplink synchronous in the TA adjustment order of UE transmission.
Need to prove there is not strict ordinal relation between process S36, S37, S38 and the S39, those skilled in the art can carry out accommodation to the flow process of present embodiment according to practical application.
In S31, the Serving cell/main CC when service eNB can be when UE carries out the RRC connection re-establishment be fallen chain to UE changes.UE is when carrying out the RRC connection re-establishment, can select Serving cell/main CC voluntarily, if Serving cell/main CC is selected voluntarily by UE, service eNB also can be changed the Serving cell/main CC of the selection of UE, in these cases, service eNB can be when sending competition solution message or RRC connection re-establishment message, in described message, increase Serving cell (Serving Cell)/main CC and change indication, indication UE should replace with former Serving cell indicated new Serving cell, that is to say, this moment service eNB need to solve in message or the RRC connection re-establishment message eNB in competition be the identification information notice UE of Serving cell/main CC of reselecting of UE.Perhaps, eNB also can change Serving cell/main CC with independent self-defined message notice UE, and this independent message can be referred to as Serving cell/main CC and change message.Correspondingly; when UE receives competition solution message or RRC connection re-establishment message; perhaps receive Serving cell/main CC when changing message as UE; UE can use the parameter of the new Serving cell/main CC that indicates in these message; described parameter can comprise the PCI (physical-layer cell identifier) of new Serving cell/main CC or frequency etc.; these parameters can be used as the input parameter that generates encryption and integrity protection safe key, make follow-up RRC connection foundation and RRC connect and set up the influence that complete process is not subjected to the Serving cell change.
Above-described embodiment at be that carrier wave converges the scene that UE under the scene falls chain, when UE detects its a plurality of CC that using and all step-out takes place, can send preamble to carry out connection re-establishment to eNB, eNB need carry out synchronous CC at UE and be the UE Resources allocation, make UE send preamble to carry out synchronizing process in respective resources, need not UE and carry out random access procedure one by one at each CC, can under the situation of resource that practices every conceivable frugality, reduce the time delay of UE uplink synchronous.In the present embodiment, the upstream bandwidth assignment messages is carried in the competition solution message and sends, and need not to send independent upstream bandwidth assignment messages, can save the part resource.Be appreciated that UE need carry out synchronous CC and UE fall the former CC that uses before the chain can be identical or different.
The schematic diagram of another uplink synchronisation method that Fig. 5 provides for the embodiment of the invention, described method comprises:
S51:UE will insert Preamble at random and send to service eNB.Particularly, UE can send a Preamble to initiate RRC connection re-establishment process to its service eNB when detecting its a plurality of CC that using and all step-out takes place.
S52: service eNB sends accidental access response message to UE.
S53:UE sends RRC connection re-establishment request message to described service eNB.The C-RNTI identifier that in described RRC connection re-establishment request message, comprises UE.
S54: service eNB sends competition to UE and solves message.
S55: service eNB can know that according to the C-RNTI identifier of the UE that comprises in the RRC connection re-establishment request message that UE sends before uplink loss has taken place a plurality of CC that use before this UE.
S56: described service eNB sends RRC connection re-establishment message to UE, carries the upstream bandwidth assignment messages in described RRC connection re-establishment message.
Those up CC that described service eNB can be judged UE generation uplink loss do not have same TA value, if the same TA value that these CC do not have, then the eNB transmission that can distribute for UE at a plurality of CC that UE need carry out uplink synchronous inserts the bandwidth resources of preamble at random, and adopts the described bandwidth resources that insert preamble at a plurality of CC that need UE to carry out uplink synchronous for the transmission of UE distribution at random of upstream bandwidth assignment information indication.In this process, the content that eNB can comprise the upstream bandwidth assignment messages sends as a field of RRC connection re-establishment message, that is to say that a plurality of CC that can be included in UE execution uplink synchronous in the RRC connection re-establishment message go up the bandwidth resources that the transmission that distributes for UE inserts preamble at random.The described UE of needs carry out uplink synchronous a plurality of CC can to fall a plurality of CC that use before the chain identical or different with UE.Similar with embodiment before, eNB can comprise each that distribute to UE in the upstream bandwidth assignment messages need carry out the identifier of CC of uplink synchronous and the uplink time information of the transmission preamble corresponding with these CC; In a kind of concrete application, the a plurality of CC that indicate in the upstream bandwidth assignment messages can be divided into groups, need to be about to a plurality of CC that UE carries out uplink synchronous to divide into groups according to whether sharing a TA, and with this grouping information by broadcasting or dedicated signaling send to UE, for the embodiment before content of by the agency of, do not do being repeated in this description herein.Be appreciated that in this process, can with the upstream bandwidth assignment messages as one independently message send, rather than be carried in the RRC connection re-establishment message.Independently can there be strict sending order between upstream bandwidth assignment messages and RRC connection re-establishment message.
Send preamble to service eNB on the bandwidth resources that S57:UE indicates in described upstream bandwidth assignment messages.Described preamble can be selected at random by UE; Perhaps, can be with the preamble that sends among the process S51 preamble as this transmission, the complexity when reducing eNB blind Detecting preamble.
S58:UE sends the RRC connection re-establishment to described eNB and finishes message.
S59: described service eNB sends TA to UE and adjusts order.Particularly, eNB can comprise the TA value that needs the required adjustment of a plurality of CC of uplink synchronous in the TA adjustment order of UE transmission.
Need to prove there is not strict ordinal relation between process S57, S58 and the S59.And with embodiment is similar before, service eNB can be when sending competition solution message or RRC connection re-establishment message in the present embodiment, in described message, increase Serving cell (Serving Cell)/main CC and change indication, indication UE should replace with indicated new Serving cell/main CC with former Serving cell/main CC, and present embodiment repeats no more this.
Above-described embodiment at be that carrier wave converges the scene that UE under the scene falls chain, described upstream bandwidth assignment messages is carried in the RRC connection re-establishment message and sends, and need not to send independent upstream bandwidth assignment messages, can save the part resource.
Need to prove that in the enforcement described in above-mentioned Fig. 3 and Fig. 5, the upstream bandwidth assignment messages is that the competition that is carried at process S35 solves message or is carried in the RRC connection re-establishment message of S56 and sends together.Perhaps, the upstream bandwidth assignment messages can be used as message independently and solves the parallel UE that sends to of message or RRC connection re-establishment message with competition, and parallel transmission described here just sends at one time.In addition, the upstream bandwidth assignment messages also can be used as independent message and sends in any time that sends between competition solution message and these two processes of RRC connection re-establishment message, and present embodiment does not limit this.
The schematic diagram of another uplink synchronisation method that Fig. 6 provides for the embodiment of the invention, described method comprises:
S61:UE receives from the switching command message of source eNB or the RRC that has a mobile management field and connects reconfiguration message.
S62:UE will insert Preamble at random and send to target eNB.
S63: target eNB sends accidental access response message to UE.
S64:UE sends handoff completion message or RRC to described target eNB and connects to reshuffle and finish message.Described handoff completion message or RRC connection are reshuffled and are finished the C-RNTI identifier that can comprise described UE in the message.
S65: target eNB receive described handoff completion message or RRC connect reshuffle finish message after, finish the same TA value that a plurality of CC that indication in the message determines to use before the described UE do not have according to described handoff completion message or RRC connection re-establishment, then target eNB sends competition to UE and solves message, and carries the upstream bandwidth assignment messages in described competition solves message.Concrete competition solves message transmitting process and can not do herein and give unnecessary details with reference to embodiment before.Be appreciated that the upstream bandwidth assignment messages can solve transmission separately outside the message in described competition.
Send preamble to target eNB on the bandwidth resources that S66:UE indicates in described upstream bandwidth assignment messages.Described preamble can be selected at random by UE; Perhaps, can be with the preamble that sends among the process S62 preamble as this transmission, the complexity when reducing target eNB blind Detecting preamble.
S67: described target eNB sends TA to UE and adjusts order.Particularly, target eNB can comprise the TA value that needs the required adjustment of a plurality of CC of uplink synchronous in the TA adjustment order of UE transmission.
Need to prove there is not strict ordinal relation between process S66 and the S67 equally.
Above-described embodiment at be that carrier wave converges the scene that UE switches under the scene, when need switching and send preamble to target eNB, UE reshuffles to connect, target eNB need be carried out synchronous CC at UE and be the UE Resources allocation, make UE send preamble to finish synchronizing process in target eNB in respective resources, need not UE and carry out random access procedure one by one at each CC, can under the situation of resource that practices every conceivable frugality, reduce the time delay of UE uplink synchronous.
The schematic diagram of a kind of base station equipment that Fig. 7 provides for the embodiment of the invention, described base station comprises:
Described base station equipment can indicate subscriber equipment need carry out synchronous CC and respective resources, make subscriber equipment can initiate subsequent synchronization processes, need not subscriber equipment and carry out random access procedure one by one at each composition carrier wave, can under the situation of resource that practices every conceivable frugality, reduce the time delay of subscriber equipment uplink synchronous.
Further, described information distribution unit 71 can comprise: carry sending module, send to described subscriber equipment for described upstream bandwidth assignment information being carried in competition solution message or the radio resource control connection re-establishment message.By the described process of transmitting that carries, need not independent signaling and send the upstream bandwidth assignment information, can save the part signaling consumption.
Further, described base station also can comprise: the switching notice unit; Serving cell/when main CC changed, described switching notice unit indicated subscriber equipment to switch to new Serving cell/main CC for utilizing competition to solve message, radio resource control connection re-establishment message or self-defined message when the needs subscriber equipment is carried out.
The schematic diagram of a kind of subscriber equipment that Fig. 8 provides for the embodiment of the invention, described subscriber equipment comprises:
First transmitting element 81 is used for forming on the carrier wave to base station transmission random access lead code first;
Information acquisition unit 82, be used for when receiving competition solution message or radio resource control connection re-establishment message, obtaining the upstream bandwidth assignment information, determine synchronous composition carrier wave and the described composition carrier wave corresponding bandwidth resource of needs subscriber equipment execution according to the indication of described upstream bandwidth assignment information, described composition carrier wave corresponding bandwidth resource is used for described subscriber equipment and sends random access lead code at this composition carrier wave;
Second transmitting element 83 is used on described composition carrier wave corresponding bandwidth resource to base station transmission random access lead code;
Regularly receiving element 84 is used for receiving the timing advance order from the base station, obtains the timing advance value of described composition carrier wave according to the indication of described timing advance order.
Described subscriber equipment is when step-out all takes place and maybe needs carry out to switch in its a plurality of composition carrier waves, can carry out synchronous CC expansion synchronously at needs by obtaining the upstream bandwidth assignment information, need not to carry out independently uplink synchronous flow process at each CC, under the situation of resource that practices every conceivable frugality, reduce the time delay of subscriber equipment uplink synchronous.
Further, described information acquisition unit 82 can comprise: information receiving module, be used for receiving competition and solve message or radio resource control connection re-establishment message, obtain the upstream bandwidth assignment information that is carried in described competition solution message or the radio resource control connection re-establishment message.
Further, described information acquisition unit 82 also can comprise: the first resource determination module, at least 1 identifier of forming carrier wave that is used for comprising according to described upstream bandwidth assignment information is determined to form the carrier wave corresponding bandwidth resource with the identifier corresponding bandwidth resource of this composition carrier wave as this.Perhaps, described information acquisition unit 82 also can comprise: the second resource determination module, form the representative identifier of forming carrier wave in the carrier wave set at least 1 that is used for comprising according to described upstream bandwidth assignment information, definite and this representativeness is formed the identifier corresponding bandwidth resource of carrier wave and is formed composition carrier wave corresponding bandwidth resource in carrier wave set as this, and the timing advance value of interior all the composition carrier waves of described composition carrier wave set equates.
Again further, described second transmitting element 83 can comprise: select sending module, the random access lead code that the random access lead code conduct that sends at the first composition carrier wave for described first receiving element of selection sends in described composition carrier wave corresponding bandwidth resource.If identical with the lead code that sends at the first composition carrier wave in the lead code that needs the synchronous carrier wave of subscriber equipment to send, can avoid the base station that the lead code that subscriber equipment sends is carried out blind Detecting.
Further; described subscriber equipment also can comprise: the change performance element; the indication that is used for solving according to the competition that receives message, radio resource control connection re-establishment message or self-defined message switches to new Serving cell/main CC, and parameters such as physical-layer cell indications that will new Serving cell/main CC, frequency are as the input parameter that generates encryption and integrity protection safe key.
Be appreciated that base station that the embodiment of the invention provides and subscriber equipment can carry out before flow process among the method embodiment, reach the effect that under the situation of resource that practices every conceivable frugality, reduces subscriber equipment uplink synchronous time delay.
One of ordinary skill in the art will appreciate that all or part of flow process among the said method embodiment, can instruct related hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; above-described embodiment can also be made some improvement and modification, and these improve and modification also should be considered as protection scope of the present invention.
Claims (16)
1. a uplink synchronisation method is characterized in that, comprising:
Receive subscriber equipment and form the random access lead code that carrier wave sends first, when sending competition solution message or radio resource control connection re-establishment message, send the upstream bandwidth assignment information to subscriber equipment, need subscriber equipment to carry out synchronous composition carrier wave and described composition carrier wave corresponding bandwidth resource with indication, described composition carrier wave corresponding bandwidth resource is used for described subscriber equipment and sends random access lead code at this composition carrier wave;
Receive the random access lead code that described subscriber equipment sends in described composition carrier wave corresponding bandwidth resource, send the timing advance order to described subscriber equipment, be notified to described subscriber equipment with the timing advance value with described composition carrier wave.
2. method according to claim 1 is characterized in that,
Comprise in the described upstream bandwidth assignment information: at least 1 identifier of forming carrier wave and with this composition carrier wave corresponding bandwidth resource; Perhaps
Comprise in the described upstream bandwidth assignment information: form the identifier of representative composition carrier wave in the carrier wave set and form the carrier wave corresponding bandwidth resource with this representativeness at least 1, the timing advance value that all in the described composition carrier wave set are formed carrier wave equates.
3. method according to claim 1, it is characterized in that, describedly when sending competition to solve message or radio resource control connection re-establishment message, send the upstream bandwidth assignment information to subscriber equipment and comprise: described upstream bandwidth assignment information is carried at described competition and solves in message or the radio resource control connection re-establishment message and send to described subscriber equipment.
4. according to each described method among the claim 1-3, it is characterized in that, Serving cell/when master's composition carrier wave changed, the utilization competition solved the renewal that message, radio resource control connection re-establishment message or self-defined message are indicated subscriber equipment execution Serving cell/master's composition carrier wave when the needs subscriber equipment is carried out.
5. a uplink synchronisation method is characterized in that, comprising:
Form on the carrier wave to base station transmission random access lead code first;
When receiving competition solution message or radio resource control connection re-establishment message, obtain the upstream bandwidth assignment information, determine synchronous composition carrier wave and the described composition carrier wave corresponding bandwidth resource of needs subscriber equipment execution according to the indication of described upstream bandwidth assignment information;
On described composition carrier wave corresponding bandwidth resource, send random access lead code to the base station;
Reception obtains the timing advance value of described composition carrier wave from the timing advance order of base station according to the indication of described timing advance order.
6. method according to claim 5, it is characterized in that, describedly obtain the upstream bandwidth assignment information when competition solves message or radio resource control connection re-establishment message and comprise receiving: receive competition and solve message or radio resource control connection re-establishment message, obtain and be carried at described competition and solve upstream bandwidth assignment information in message or the radio resource control connection re-establishment message.
7. method according to claim 5 is characterized in that, described indication according to described upstream bandwidth assignment information determines that synchronous composition carrier wave and the described composition carrier wave corresponding bandwidth resource of needs subscriber equipment execution comprises:
According at least 1 that comprises in the described upstream bandwidth assignment information identifier of forming carrier wave, determine with this identifier corresponding bandwidth resource of forming carrier wave as this composition carrier wave corresponding bandwidth resource; Perhaps
Form the representative identifier of forming carrier wave in the carrier wave set according at least 1 that comprises in the described upstream bandwidth assignment information, definite and this representativeness is formed the identifier corresponding bandwidth resource of carrier wave and is formed composition carrier wave corresponding bandwidth resource in carrier wave set as this, and the timing advance value of interior all the composition carrier waves of described composition carrier wave set equates.
8. method according to claim 5 is characterized in that, described random access lead code and the described random access lead code that sends at the first composition carrier wave that sends in composition carrier wave corresponding bandwidth resource is same lead code.
9. according to each described method among the claim 5-8, it is characterized in that, also comprise:
The renewal that Serving cell/master forms carrier wave is carried out in the indication that solves message, radio resource control connection re-establishment message or self-defined message according to the competition that receives, and physical-layer cell indications that will new Serving cell/master composition carrier wave, frequency are as the input parameter of generation encryption and integrity protection safe key.
10. a base station is characterized in that, comprising:
The information distribution unit, be used for receiving subscriber equipment and form the random access lead code that carrier wave sends first, when sending competition solution message or radio resource control connection re-establishment message, send the upstream bandwidth assignment information to subscriber equipment, need subscriber equipment to carry out synchronous composition carrier wave and described composition carrier wave corresponding bandwidth resource with indication, described composition carrier wave corresponding bandwidth resource is used for described subscriber equipment and sends random access lead code at this composition carrier wave;
The timing indicating member, be used for receiving the random access lead code that described subscriber equipment sends in described composition carrier wave corresponding bandwidth resource, send the timing advance order to described subscriber equipment, be notified to described subscriber equipment with the timing advance value with described composition carrier wave.
11. base station according to claim 10, it is characterized in that, described information distribution unit comprises: carry sending module, send to described subscriber equipment for described upstream bandwidth assignment information being carried in competition solution message or the radio resource control connection re-establishment message.
12. a subscriber equipment is characterized in that, comprising:
First transmitting element is used for forming on the carrier wave to base station transmission random access lead code first;
Information acquisition unit, be used for when receiving competition solution message or radio resource control connection re-establishment message, obtaining the upstream bandwidth assignment information, determine synchronous composition carrier wave and the described composition carrier wave corresponding bandwidth resource of needs subscriber equipment execution according to the indication of described upstream bandwidth assignment information, described composition carrier wave corresponding bandwidth resource is used for described subscriber equipment and sends random access lead code at this composition carrier wave;
Second transmitting element is used on described composition carrier wave corresponding bandwidth resource to base station transmission random access lead code;
Regularly receiving element is used for receiving the timing advance order from the base station, obtains the timing advance value of described composition carrier wave according to the indication of described timing advance order.
13. subscriber equipment according to claim 12, it is characterized in that, described information acquisition unit comprises: information receiving module, be used for receiving competition and solve message or radio resource control connection re-establishment message, obtain the upstream bandwidth assignment information that is carried in described competition solution message or the radio resource control connection re-establishment message.
14. subscriber equipment according to claim 12, it is characterized in that, described information acquisition unit comprises: the first resource determination module, at least 1 identifier of forming carrier wave that is used for comprising according to described upstream bandwidth assignment information is determined to form the carrier wave corresponding bandwidth resource with the identifier corresponding bandwidth resource of this composition carrier wave as this; Perhaps,
Described information acquisition unit comprises: the second resource determination module, form the representative identifier of forming carrier wave in the carrier wave set at least 1 that is used for comprising according to described upstream bandwidth assignment information, definite and this representativeness is formed the identifier corresponding bandwidth resource of carrier wave and is formed composition carrier wave corresponding bandwidth resource in carrier wave set as this, and the timing advance value of interior all the composition carrier waves of described composition carrier wave set equates.
15. subscriber equipment according to claim 12, it is characterized in that, described second transmitting element comprises: select sending module, the random access lead code that the random access lead code conduct that sends at the first composition carrier wave for described first transmitting element of selection sends in described composition carrier wave corresponding bandwidth resource.
16. according to each described subscriber equipment among the claim 12-15; it is characterized in that; also comprise: the change performance element; the renewal that Serving cell/master forms carrier wave is carried out in the indication that is used for solving according to the competition that receives message, radio resource control connection re-establishment message or self-defined message, and physical-layer cell indications that will new Serving cell/master composition carrier wave, frequency information are as the input parameter of generation encryption and integrity protection safe key.
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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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| CN102227939B true CN102227939B (en) | 2013-09-25 |
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| WO2014113995A1 (en) * | 2013-01-28 | 2014-07-31 | Empire Technology Development Llc | Maintaining uplink synchronization |
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| WO2011050535A1 (en) | 2011-05-05 |
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