CN103517399A - Method and apparatus for carrier synchronization - Google Patents
Method and apparatus for carrier synchronization Download PDFInfo
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- CN103517399A CN103517399A CN201210213494.2A CN201210213494A CN103517399A CN 103517399 A CN103517399 A CN 103517399A CN 201210213494 A CN201210213494 A CN 201210213494A CN 103517399 A CN103517399 A CN 103517399A
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Abstract
The invention discloses a method and apparatus for carrier synchronization. The method comprises the following steps that: an indication for indicating a new carrier wave as a synchronous new carrier and/or a nonsynchronous new carrier wave is carried in a message of a base station; and the base station sends the message to user equipment (UE) so as to trigger the UE to carry out carrier synchronization on the nonsynchronous new carrier wave. According to the invention, the resource utilization rate is improved.
Description
Technical field
The present invention relates to the communications field, in particular to carrier synchronization method and device.
Background technology
Development along with Mobile Communication Industry, and the continuous growth to mobile data services demand, people are to the speed of mobile communication and service quality (Quantity of Service, referred to as Qos) requirement more and more higher, so at 3G (Third Generation) Moblie (3rdGeneration, referred to as 3G) also there is no extensive commercialization before, just started the research-and-development activity to next generation mobile communication system, wherein relatively be typically third generation partner program (3rd Generation Partnership Project, referred to as 3GPP) Long Term Evolution (the Long Term Evolution that starts, referred to as LTE) project, the available maximum spectrum bandwidth of LTE system is 20MHz(megahertz).Along with the further evolution of network, LTE-A (evolution LTE), as the evolution system of LTE, can provide the spectral bandwidth up to 100MHz, supports more flexible higher-quality communication, and LTE-A system possesses good backwards compatibility simultaneously.In LTE-A system, have a plurality of component carriers (Component Carrier, referred to as CC), a LTE terminal can only be operated on the CC of some backward compatibility, and the stronger LTE-A terminal of ability can be transmitted simultaneously on a plurality of CC.The terminal that realizes LTE-A is transmitted simultaneously and receives data in a plurality of component carriers, thereby reaches the object that promotes bandwidth.This technology is called as multi-carrier polymerizing technology.
In LTE-A system, support multi-carrier polymerizing technology, by multi-carrier polymerizing in the hope of reaching larger bandwidth for transmission data.Maximum 5 carrier waves of base station subordinate, these carrier waves are called as component carrier, are all the carrier waves with backwards compatibility.Along with standardized progress, in agreement, regulation is introduced via node, the type of relaying is various, such as having Pico, femto, RRH etc. (via node in the application take RRH describe as example), has like this some carrier waves need to be by arriving UE after the relaying of RRH.
These carrier waves all have backward compatibility character, and its configuration is all that agreement fixes, and the configuration of each carrier wave is identical.But, in actual applications, there is no need each carrier wave to be configured to separately have the carrier wave of backwards compatibility, because, in backward compatibility carrier wave, can configure each channel of supporting legacy version and reference signal etc., these channels and reference signal have affected the efficiency of this carrier wave to a certain extent, progress along with technology, the efficiency of these channels and reference signal is in significant reduction, particularly in system during the UE negligible amounts of legacy version, because the release arena of history that the UE of legacy version after all can be slowly.So need through the research for multicarrier system, proposed carrier wave configuration mode that a kind of carrier wave is new to improve the utilance of frequency spectrum.
At new carrier wave, lack control information, new carrier wave be not can independent operating carrier wave, need and the carrier wave of backward compatibility exists jointly.In new carrier wave, have again two class carrier waves, a class is synchronous carrier wave, and such carrier wave is synchronizeed with compatible carrier wave, does not need independently synchronizing process after such carrier wave is configured; Another kind of is asynchronous carrier wave, and such carrier wave and compatible carrier wave are asynchronous, and such carrier wave needs extra synchronizing process after configuration.In asynchronous new carrier wave, it is synchronous to obtain that UE need to read CRS signal.
For UE in correlation technique, cannot learn that the new carrier wave of current configuration is synchronous new carrier wave or asynchronous new carrier wave, cause the problem that resource utilization is lower, not yet propose at present effective solution.
Summary of the invention
For UE, cannot learn that the new carrier wave of current configuration is synchronous new carrier wave or asynchronous new carrier wave, cause the problem that resource utilization is lower, the invention provides carrier synchronization method and device, at least to address this problem.
According to an aspect of the present invention, provide a kind of carrier synchronization method, having comprised: base station has been carried and has been used to indicate new carrier wave for the indication of synchronous new carrier wave and/or asynchronous new carrier wave in message; This base station sends to UE by this message, triggers this UE and carry out carrier synchronization on this asynchronous new carrier wave.
Preferably, described base station sends to UE to comprise described message: described base station sends described message by compatible carrier wave or new carrier wave.
Preferably, in the message that base station sends, comprise and be used to indicate the indication that new carrier wave is synchronous new carrier wave and/or asynchronous new carrier wave and comprise:
Described base station parameter to described new carrier wave in radio resource control RRC configuration messages is configured, and wherein, described configuration operation is included in the parameter configuration of described new carrier wave and adds described new carrier wave for the indication of synchronous new carrier wave or asynchronous new carrier wave; Or
Synchronous new carrier list and/or asynchronous new carrier list are added in described base station in described RRC configuration messages, wherein, the carrier identification of carrying synchronous new carrier wave in described synchronous new carrier list, the carrier identification of carrying asynchronous new carrier wave in described asynchronous new carrier list; Or
Described base station is described synchronous new carrier wave and/or described asynchronous new carrier wave by the described new carrier wave of media access control MAC control element indication sending on described compatible carrier wave.
Preferably, described RRC configuration messages comprises: RRC connects reallocation message.
According to another aspect of the invention, provide a kind of carrier synchronization method, having comprised: user equipment (UE) receives the message that base station sends, wherein this message carries the indication that new carrier wave is synchronous new carrier wave and/or asynchronous new carrier wave that is used to indicate of base station configuration; This UE is defined as the new carrier wave of this asynchronous new carrier wave according to this information, and carries out carrier synchronization on the new carrier wave of this asynchronous new carrier wave.
Preferably, described UE determines that according to described message asynchronous new carrier wave comprises:
Described message is the radio resource control RRC configuration messages that carries the parameter of described new carrier wave, wherein, described configuration operation is included in the parameter configuration of described new carrier wave and adds the indication that described new carrier wave is described asynchronous new carrier wave, and described UE determines described asynchronous new carrier wave according to described indication; Or
Described message is the RRC configuration messages that is added with synchronous new carrier list and/or asynchronous new carrier list, wherein, the carrier identification of carrying synchronous new carrier wave in described synchronous new carrier list, the carrier identification of carrying asynchronous new carrier wave in described asynchronous new carrier list, described UE determines one of in the following manner described asynchronous new carrier wave:
Determine that described carrier identification is that the new carrier wave of asynchronous new carrier wave is described asynchronous new carrier wave;
Determine that the new carrier wave of getting rid of outside the new carrier wave that described carrier identification is synchronous new carrier wave in the new carrier wave getting is described asynchronous new carrier wave; Or
Described message is to carry to be used to indicate the media access control MAC control element that described new carrier wave is described asynchronous new carrier wave, and described UE determines described asynchronous new carrier wave according to described MAC control element.
Preferably, described RRC configuration messages comprises: RRC connects reallocation message.
According to a further aspect in the invention, provide a kind of carrier synchronization device, having comprised: processing module, has been used to indicate new carrier wave for the indication of synchronous new carrier wave and/or asynchronous new carrier wave for carrying in message; Sending module, sends to UE for base station by this message, triggers this UE and carry out carrier synchronization on this asynchronous new carrier wave.
Preferably, described processing module comprises:
The first configuration module, for the parameter of described new carrier wave being configured at radio resource control RRC configuration messages, wherein, described configuration operation is included in the parameter configuration of described new carrier wave and adds the indication that described new carrier wave is described asynchronous new carrier wave; Or
The second configuration module, for adding synchronous new carrier list and/or asynchronous new carrier list at described RRC configuration messages, wherein, in described synchronous new carrier list, carry the cell ID of synchronous new carrier wave, the carrier identification of carrying asynchronous new carrier wave in described asynchronous new carrier list; Or
The 3rd configuration module is described synchronous new carrier wave and/or described asynchronous new carrier wave for the described new carrier wave of media access control MAC control element indication sending on described compatible carrier wave.
According to a further aspect in the invention, provide a kind of carrier synchronization device, having comprised: receiver module, the message sending for receiving base station, wherein this message carries the indication that new carrier wave is synchronous new carrier wave and/or asynchronous new carrier wave that is used to indicate of base station configuration; The first determination module, for determining this asynchronous new carrier wave according to this information; Synchronization module, for carrying out carrier synchronization on this asynchronous new carrier wave.
Preferably, described the first determination module comprises:
The second determination module, for described message, it is the radio resource control RRC configuration messages that carries the parameter of described new carrier wave, wherein, described configuration operation is included in the parameter configuration of described new carrier wave and adds the indication that described new carrier wave is described asynchronous new carrier wave, and described UE determines that described indication determines described asynchronous new carrier wave; Or
The 3rd determination module, described RRC configuration messages for described message for the synchronous new carrier list of interpolation and/or asynchronous new carrier list, wherein, the carrier identification of carrying synchronous new carrier wave in described synchronous new carrier list, the carrier identification of carrying asynchronous new carrier wave in described asynchronous new carrier list, determine one of in the following manner described asynchronous new carrier wave:
Described carrier identification is that the new carrier wave of asynchronous new carrier wave is described asynchronous new carrier wave;
The new carrier wave of getting rid of in the new carrier wave receiving outside the new carrier wave that described carrier identification is synchronous new carrier wave is described asynchronous new carrier wave; Or
The 4th determination module, is to carry to be used to indicate the media access control MAC control element that described new carrier wave is described asynchronous new carrier wave for described message, according to described MAC control element, determines described asynchronous new carrier wave.
By the present invention, in the information that adopts base station to send on compatible carrier wave, dispose and be used to indicate new carrier wave for synchronous new carrier wave and/or the non-indication with synchronous new carrier wave, make UE can know that the new carrier wave of current configuration is asynchronous new carrier wave, and carry out carrier synchronization, solved UE and cannot learn that the new carrier wave of current configuration is synchronous new carrier wave or asynchronous new carrier wave, cause the problem that resource utilization is lower, and then reached the effect that improves resource utilization.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the first pass figure according to the carrier synchronization method of the embodiment of the present invention;
Fig. 2 is the second flow chart according to the carrier synchronization method of the embodiment of the present invention;
Fig. 3 is according to the first structured flowchart of the carrier synchronization device of the embodiment of the present invention;
Fig. 4 is according to preferred the first structured flowchart of the carrier synchronization device of the embodiment of the present invention;
Fig. 5 is according to the second structured flowchart of the carrier synchronization device of the embodiment of the present invention;
Fig. 6 is according to preferred the second structured flowchart of the carrier synchronization device of the embodiment of the present invention;
Fig. 7 is according to the design reference schematic diagram of the MAC control element of the embodiment of the present invention;
Fig. 8 is the schematic diagram covering according to the compatible carrier wave of the embodiment of the present invention and new carrier wave;
Fig. 9 is the flow chart one according to the carrier synchronization of the preferred embodiment of the embodiment of the present invention;
Figure 10 is according to the flowchart 2 of the carrier synchronization of the preferred embodiment of the embodiment of the present invention; And
Figure 11 is according to the flow chart 3 of the carrier synchronization of the preferred embodiment of the embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
This preferred embodiment provides a kind of method of carrier synchronization, and Fig. 1 is the first pass figure according to the carrier synchronization method of the embodiment of the present invention, comprises following step S102 and step S104.
Step S102: base station is carried and is used to indicate new carrier wave for the indication of synchronous new carrier wave and/or asynchronous new carrier wave in message.
Step S104: base station sends to UE by this information, triggers this UE and carry out carrier synchronization on asynchronous new carrier wave.
Pass through above-mentioned steps, base station sends and carries the message that the new carrier wave of indication is the indication of synchronous new carrier wave and/or asynchronous new carrier wave, and this information is sent to UE, make UE can know whether the new carrier wave of current configuration is asynchronous new carrier wave, then on asynchronous new carrier wave, carry out carrier synchronization, solved UE and cannot learn that the new carrier wave of current configuration is synchronous new carrier wave or asynchronous new carrier wave, cause the problem that resource utilization is lower, and then reached the effect that improves resource utilization.
In order to improve base station, send the flexibility of this message, base station can send this message by compatible carrier wave or new carrier wave.
When implementing, can be accomplished in several ways in the information sending on compatible carrier wave and be configured for the new carrier wave of indication for the indication of synchronous newly carrier wave and/or asynchronous new carrier wave.This preferred embodiment provides following three kinds of modes:
Mode one: base station parameter to this new carrier wave in RRC configuration messages is configured, wherein, this configuration operation is included in the parameter configuration of this new carrier wave and adds this new carrier wave for the indication of synchronous new carrier wave or asynchronous new carrier wave; Or
Mode two: synchronous new carrier list and/or asynchronous new carrier list are added in base station in RRC configuration messages, wherein, the carrier identification of carrying synchronous new carrier wave in this synchronous new carrier list, the carrier identification of carrying asynchronous new carrier wave in this asynchronous new carrier list; Or
Mode three: base station indicates this new carrier wave for this synchronous new carrier wave and/or this asynchronous new carrier wave by the media access control MAC control element sending on this compatible carrier wave.
In order to reduce meeting of signaling, can adopt existing signaling, for example: this RRC configuration messages comprises: RRC connects reallocation message.
This preferred embodiment provides a kind of method of carrier synchronization, and Fig. 2 is the second flow chart according to the carrier synchronization method of the embodiment of the present invention, comprises following step S202 and step S204.
Step S202:UE receives the message that base station sends, and wherein this message carries the indication that new carrier wave is synchronous new carrier wave and/or asynchronous new carrier wave that is used to indicate of base station configuration.
Step S204:UE is defined as the new carrier wave of asynchronous new carrier wave according to this message, and carries out carrier synchronization on the new carrier wave of this asynchronous new carrier wave.
Pass through above-mentioned steps, UE receives the message that the new carrier wave of indication is the indication of synchronous new carrier wave and/or asynchronous new carrier wave that carries of base station transmission, whether the new carrier wave that can know current configuration is asynchronous new carrier wave, then on asynchronous new carrier wave, carry out carrier synchronization, solved UE and cannot learn that the new carrier wave of current configuration is synchronous new carrier wave or asynchronous new carrier wave, cause the problem that resource utilization is lower, and then reached the effect that improves resource utilization.
Corresponding to the numerous embodiments of above-described embodiment base station indication, in UE side, can determine in the following way asynchronous new carrier wave.
Mode one: this message is the radio resource control RRC configuration messages that carries the parameter of this new carrier wave, wherein, this configuration operation is included in the parameter configuration of this new carrier wave and adds the indication that this new carrier wave is this asynchronous new carrier wave, and this UE determines this asynchronous new carrier wave according to this indication; Or
Mode two: this message is the RRC configuration messages that is added with synchronous new carrier list and/or asynchronous new carrier list, wherein, the carrier identification of carrying synchronous new carrier wave in this synchronous new carrier list, the carrier identification of carrying asynchronous new carrier wave in this asynchronous new carrier list, this UE determines one of in the following manner this asynchronous new carrier wave:
Determine that carrier identification is that the new carrier wave of asynchronous new carrier wave is asynchronous new carrier wave;
Determine that the new carrier wave of getting rid of outside the new carrier wave that this carrier identification is synchronous new carrier wave in the new carrier wave getting is this asynchronous new carrier wave; Or
Mode three: this message is to carry to be used to indicate the media access control MAC control element that this new carrier wave is this asynchronous new carrier wave, and UE determines this asynchronous new carrier wave according to this MAC control element.
In order to reduce meeting of signaling, can adopt existing signaling, for example: this RRC configuration messages comprises: RRC connects reallocation message.
It should be noted that, in the step shown in the flow chart of accompanying drawing, can in the computer system such as one group of computer executable instructions, carry out, and, although there is shown logical order in flow process, but in some cases, can carry out shown or described step with the order being different from herein.
In another embodiment, also provide a kind of carrier synchronization software, the technical scheme that this software is described for carrying out above-described embodiment and preferred embodiment.
In another embodiment, also provide a kind of storage medium, stored above-mentioned carrier synchronization software in this storage medium, this storage medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.
The embodiment of the present invention also provides a kind of carrier synchronization device, this device can be applied to base station, this carrier synchronization device can be for realizing above-mentioned carrier synchronization method and preferred implementation, carried out explanation, repeat no more, below the module relating in this carrier synchronization device is described.As used below, the combination of software and/or the hardware of predetermined function can be realized in term " module ".Although the described system and method for following examples is preferably realized with software, hardware, or the realization of the combination of software and hardware also may and be conceived.
Fig. 3 is according to the first structured flowchart of the carrier synchronization device of the embodiment of the present invention, and as shown in Figure 3, this device comprises: processing module 32, sending module 34, is described in detail said structure below.
Processing module 32, is configured for for the information sending on compatible carrier wave the indication that the new carrier wave of indication is synchronous new carrier wave and/or asynchronous new carrier wave; Sending module 34, is connected to processing module 32, for this message is sent to UE, triggers UE and carry out carrier synchronization on this asynchronous new carrier wave.
Fig. 4 is according to preferred the first structured flowchart of the carrier synchronization device of the embodiment of the present invention, as shown in Figure 4, the first configuration process 32 comprises: the first configuration module 322, the second configuration module 324 or the 3rd configuration module 326, be described in detail said structure below.
Processing module 32 comprises: the first configuration module 322, for the parameter of this new carrier wave being configured at radio resource control RRC configuration messages, wherein, this configuration operation is included in and in the parameter configuration of this new carrier wave, adds the indication that this new carrier wave is this asynchronous new carrier wave; Or
The second configuration module 324, for adding synchronous new carrier list and/or asynchronous new carrier list at this RRC configuration messages, wherein, in this synchronous new carrier list, carry the cell ID of synchronous new carrier wave, the carrier identification of carrying asynchronous new carrier wave in this asynchronous new carrier list; Or
The 3rd configuration module 326, indicates this new carrier wave for this synchronous new carrier wave and/or this asynchronous new carrier wave for the media access control MAC control element sending on this compatible carrier wave.
In another embodiment, also provide a kind of carrier synchronization software, the technical scheme that this software is described for carrying out above-described embodiment and preferred embodiment.
In another embodiment, also provide a kind of storage medium, stored above-mentioned carrier synchronization software in this storage medium, this storage medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.
The embodiment of the present invention also provides a kind of carrier synchronization device, this device can be applied to UE, this carrier synchronization device can be for realizing above-mentioned carrier synchronization method and preferred implementation, carried out explanation, repeat no more, below the module relating in this carrier synchronization device is described.As used below, the combination of software and/or the hardware of predetermined function can be realized in term " module ".Although the described system and method for following examples is preferably realized with software, hardware, or the realization of the combination of software and hardware also may and be conceived.
Fig. 5 is according to the second structured flowchart of the carrier synchronization device of the embodiment of the present invention, and as shown in Figure 5, this device comprises: receiver module 52, the first determination modules 54, synchronization module 56, is described in detail said structure below.
Receiver module 52, the message sending for receiving base station, wherein this message carries the indication that new carrier wave is synchronous new carrier wave and/or asynchronous new carrier wave that is used to indicate of base station configuration; The first determination module 54, is connected to receiver module 52, for the message receiving according to receiver module 52, determines this asynchronous new carrier wave; Synchronization module 56, is connected to the first determination module 54, for carrying out carrier synchronization on the asynchronous new carrier wave of determining at the first determination module 54.
Fig. 6 is according to preferred the second structured flowchart of the carrier synchronization device of the embodiment of the present invention, as shown in Figure 6, the first determination module 54 comprises: the second determination module 542, the 3rd determination module 544 or the 4th determination module 546, be described in detail said structure below.
The first determination module 54 comprises: the second determination module 542, for this message, it is the radio resource control RRC configuration messages that carries the parameter of this new carrier wave, wherein, this configuration operation is included in and in the parameter configuration of this new carrier wave, adds the indication that this new carrier wave is this asynchronous new carrier wave, and this UE determines that this indication determines this asynchronous new carrier wave; Or
The 3rd determination module 544, this RRC configuration messages for this message for the synchronous new carrier list of interpolation and/or asynchronous new carrier list, wherein, the carrier identification of carrying synchronous new carrier wave in this synchronous new carrier list, the carrier identification of carrying asynchronous new carrier wave in this asynchronous new carrier list, determine one of in the following manner this asynchronous new carrier wave:
This carrier identification is that the new carrier wave of asynchronous new carrier wave is this asynchronous new carrier wave;
The new carrier wave of getting rid of in the new carrier wave receiving outside the new carrier wave that this carrier identification is synchronous new carrier wave is this asynchronous new carrier wave; Or
The 4th determination module 546, is to carry to be used to indicate the media access control MAC control element that this new carrier wave is this asynchronous new carrier wave for this message, according to this MAC control element, determines this asynchronous new carrier wave.
Below in conjunction with preferred embodiment, describe, following preferred embodiment combines above-described embodiment and preferred implementation.
Preferred embodiment one
This preferred embodiment provides three kinds of methods of distinguishing new carrier type, and making UE can distinguish new carrier wave is synchronous or asynchronous carrier wave, and on asynchronous carrier wave, receives the synchronizing process that synchronizing signal completes carrier wave.
Method in this preferred embodiment comprises the steps: that Fig. 9 is the flow chart one of carrier synchronization according to the preferred embodiment of the invention, as shown in Figure 9, and the method comprising the steps of S902 and step S904.
Step S902: the base station new carrier wave of indication UE is synchronous or asynchronous new carrier wave.
Step S904:UE receives synchronizing signal according to the indication of base station and completes new carrier synchronization on asynchronous new carrier wave.
Above-mentioned steps can realize by following three kinds of methods.
Method one: new carrier type is controlled (Radio Resource Control, referred to as RRC) message by the Radio Resource sending on compatible carrier wave and is configured.In RRC configuration messages, as RRC connects in reallocation message, new carrier wave is configured, can in the configuration of new carrier wave, add this new carrier wave of indication is the Warning Mark of synchronous new carrier wave or asynchronous new carrier wave.
When UE receives after this RRC configuration messages, read the flag bit (Warning Mark) in this RRC configuration messages, according to the new carrier wave of the acquisition of information of this flag bit, whether be synchronous or asynchronous new carrier wave, UE carries out carrier synchronization process on asynchronous carrier wave.
Method two: new carrier type is configured by the RRC message sending on compatible carrier wave.
In RRC configuration messages, as RRC connects the synchronous new carrier list of interpolation and asynchronous new carrier list in reallocation message, in synchronous new carrier list, carry the cell ID of synchronous new carrier wave, the carrier identification of carrying asynchronous new carrier wave in asynchronous new carrier list.UE carries out carrier synchronization process according to the carrier identification in asynchronous new carrier list on these new carrier waves.
Or connect the synchronous new carrier list of interpolation in reallocation message at RRC, in synchronous new carrier list, carry the cell ID of synchronous new carrier wave, UE determines that according to the cell ID in synchronous new carrier list which carrier wave is for synchronous new carrier wave, and the new carrier wave in synchronous new carrier identification list is not defaulted as asynchronous new carrier wave.
Or connect in reallocation message and add asynchronous new carrier list at RRC, in asynchronous new carrier list, carry the cell ID of asynchronous new carrier wave, UE determines that according to the cell ID in asynchronous new carrier list which carrier wave is asynchronous new carrier wave, and the new carrier wave in asynchronous new carrier identification list is not defaulted as synchronous new carrier wave.
Method three: new carrier type is by media access control (Media Access Control, referred to as MAC) the control element notice UE sending on compatible carrier wave.
UE receiving the configuration of new carrier wave and completing after configuration, and UE waits for the MAC control element sending by this compatible carrier wave, carries the type information of new carrier wave in this element, and new carrier wave be synchronously newly carrier wave or asynchronous new carrier wave.
As an execution mode preferably, can the adopting shown in Fig. 7 of this MAC control element, in Fig. 7, Ci:i represents the cell ID of corresponding asynchronous new carrier wave;
When Ci=0, represent that this new carrier wave is synchronized cells, during Ci=1, represent that this new carrier wave is asynchronous new carrier wave; Or, when Ci=0, represent that this new carrier wave is non-synched cells, during Ci=1, represent that this new carrier wave is for synchronous new carrier wave;
UE, according to the indication information in MAC CE, determines whether new carrier wave synchronizes with compatible carrier wave, on non-same new carrier wave, carries out carrier synchronization process.
Preferred embodiment two
This preferred embodiment provides a kind of carrier synchronization method, in this preferred embodiment, the new carrier wave of distinguishing configuration according to pre-defined rule is synchronous new carrier wave or the method for asynchronous new carrier wave, makes UE after being configured new carrier wave, can determine whether according to corresponding indication to need receiving synchronous information to complete the synchronous of new carrier wave.
With mode of frequency division duplexing (Frequency Division Duplex, referred to as FDD), be described for example below.
As shown in Figure 8, the descending frequency f1 of carrier wave 1(, up frequency f1 '), referred to as CC1(DL f1, UL f1 ') ，Gai Serving cell is compatible community; The descending frequency f2 of carrier wave 2(), referred to as CC2(DLf2) be new carrier wave; The descending frequency f3 of carrier wave 3(), referred to as CC3(DLf3); User equipment (UE) resides in CC1 above and on CC1, initiates RRC connection procedure.
Below in conjunction with Fig. 8 and 3 instantiations, describe.
Example 1: corresponding to the mode one of above preferred embodiment, the method comprises the steps that S302 is to step S310.
Step S302:UE initiates RRC and connects on CC1, completes the access of UE in CC1.
Step S304: base station sends RRC to UE and connects reallocation message on CC1, in message, carry the configuration information of CC2 and CC3, wherein carry the information of indication CC2 and CC3 carrier type, be in the configuration of CC2, to carry the mark set information that indication CC2 is synchronous new carrier wave, in the configuration of CC3, carry the mark set information that indication CC3 is asynchronous new carrier wave.
Step S306:UE applies respectively the configuration to CC2 and CC3 after receiving RRC message, and on CC3, starts the synchronizing process of CC3.
Step S308: a period of time Hou， base station sends RRC and connects reallocation message reprovision CC2 information, and the carrier type of indicating CC2 in the configuration of CC2, carries the mark set information that indication CC2 is asynchronous new carrier wave in the configuration of CC2;
Step S310:UE receives the configuration of applying CC2 after RRC message, and starts to receive on CC2 the synchronizing process that synchronizing signal is carried out CC2.
Example 2: corresponding to the mode two of above preferred embodiment, the method comprises the steps that S402 is to step S406.
Step S402:UE initiates RRC and connects on CC1, completes the access of UE in CC1;
Step S404: base station sends RRC to UE and connects reallocation message on CC1, in message, carry the configuration information of CC2 and CC3, and carry synchronous new carrier wave and asynchronous new carrier wave configured list, the carrier identification of CC2 is in synchronous new carrier list, and the carrier identification of CC3 is in asynchronous new carrier list;
Step S406:UE applies respectively the configuration to CC2 and CC3 after receiving RRC message, and on CC3, receives for synchronous signal according to synchronous new carrier list and asynchronous new carrier list, starts the synchronizing process of CC3;
Example 3: corresponding to the mode two of above preferred embodiment, the method comprises the steps that S502 is to step S506.
Step S502:UE initiates RRC and connects on CC1, completes the access of UE in CC1;
Step S504: base station sends RRC to UE and connects reallocation message on CC1, in message, carry the configuration information of CC2 and CC3, and carry synchronous new carrier information list, and the carrier identification of CC2 is in synchronous new carrier list, and the carrier identification of CC3 is not included in synchronous new carrier list;
Step S506:UE applies respectively the configuration to CC2 and CC3 after receiving RRC message, and learn that according to synchronous new carrier list information CC2 is synchronous new carrier wave, because CC3 is not in synchronous new carrier information list, CC3 is asynchronous new carrier wave, and UE receives for synchronous signal on CC3.
Above-mentioned example 1 to 3 is realized by RRC and is connected the attribute that reallocation message configures new carrier wave by different modes, can adopt a flow process to illustrate explanation, Figure 10 is the flowchart 2 of carrier synchronization method according to the preferred embodiment of the invention, as shown in figure 10, the method comprising the steps of S1002 is to step S1006.
Step S1002:UE initiates RRC and connects on CC1, and being connected of foundation and CC1.
Step S1004: base station sends RRC connection reallocation message to UE and configures new carrier wave CC2 and CC3, wherein carries the information of indication CC2 and CC3 carrier type.
The configuration of step S1006:UE application RRC reallocation message receives synchronizing signal according to the information in message on asynchronous new carrier wave.
Example 4: corresponding to the mode two of above preferred embodiment, the method comprises the steps that S602 is to step S606.
Step S602:UE initiates RRC and connects on CC1, completes the access of UE in CC1;
Step S604: base station sends RRC to UE and connects reallocation message on CC1, in message, carry the configuration information of CC2 and CC3, and carry synchronous new carrier information list, and the carrier identification of CC2 is in asynchronous new carrier list, and the carrier identification of CC3 is not included in asynchronous new carrier list;
Step S606:UE applies respectively the configuration to CC2 and CC3 after receiving RRC message, and learn that according to asynchronous new carrier list information CC2 is asynchronous new carrier wave, because CC3 is not in asynchronous new carrier information list, CC3 is synchronous new carrier wave, and UE receives for synchronous signal on CC2;
Example 5: corresponding to the mode three of above preferred embodiment, Figure 11 is the flow chart 3 of carrier synchronization method according to the preferred embodiment of the invention, and as shown in figure 11, the method comprises the steps that S1102 is to step S1106.
Step S1102:UE initiates RRC and connects on CC1, completes the access of UE in CC1;
Step S1104: base station sends RRC to UE and connects reallocation message on CC1, carries the configuration information of CC2 and CC3 in message.
Step S1106:UE applies respectively the configuration to CC2 and CC3 after receiving RRC message.
Step S1108:UE replys RRC connection reprovision and completes message to base station.
Step S1110: base station sends the MAC control element of indication CC2 and the new carrier type of CC3 on CC1, indicating CC2 is synchronous new carrier wave, CC3 is asynchronous new carrier wave; The bit that CC2 is corresponding in MAC control element is that the bit that 0, CC3 is corresponding is 1, and now 0 represents synchronous new carrier wave, and 1 represents asynchronous new carrier wave;
Or the bit that CC2 is corresponding in MAC control element is that the bit that 1, CC3 is corresponding is 0, now 1 represents synchronous new carrier wave, and 0 represents asynchronous new carrier wave;
Step S1112:UE, according to indication information in this MAC control element, receives for synchronous signal on CC3.
Pass through above-described embodiment, carrier synchronization method and device are provided, in the information that adopts base station to send on compatible carrier wave, dispose and be used to indicate new carrier wave for synchronous new carrier wave and/or the non-indication with synchronous new carrier wave, make UE can know that the new carrier wave of current configuration is asynchronous new carrier wave, and carry out carrier synchronization, solved UE and cannot learn that the new carrier wave of current configuration is synchronous new carrier wave or asynchronous new carrier wave, cause the problem that resource utilization is lower, and then reached the effect that improves resource utilization.It should be noted that, these technique effects are not that above-mentioned all execution modes have, and some technique effect is that some preferred implementation just can obtain.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
This is only the preferred embodiments of the present invention above, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (11)
1. a carrier synchronization method, is characterized in that comprising:
In the message of base station, comprise and be used to indicate new carrier wave for the indication of synchronous new carrier wave and/or asynchronous new carrier wave;
Described base station sends to user equipment (UE) by described message, triggers described UE and carry out carrier synchronization on described asynchronous new carrier wave.
2. method according to claim 1, is characterized in that, described base station sends to UE to comprise described message: described base station sends described message by compatible carrier wave or new carrier wave.
3. method according to claim 1, is characterized in that, comprises to be used to indicate the indication that new carrier wave is synchronous new carrier wave and/or asynchronous new carrier wave and to comprise in the message that base station sends:
Described base station parameter to described new carrier wave in radio resource control RRC configuration messages is configured, and wherein, described configuration operation is included in the parameter configuration of described new carrier wave and adds described new carrier wave for the indication of synchronous new carrier wave or asynchronous new carrier wave; Or
Synchronous new carrier list and/or asynchronous new carrier list are added in described base station in described RRC configuration messages, wherein, the carrier identification of carrying synchronous new carrier wave in described synchronous new carrier list, the carrier identification of carrying asynchronous new carrier wave in described asynchronous new carrier list; Or
Described base station is described synchronous new carrier wave and/or described asynchronous new carrier wave by the described new carrier wave of media access control MAC control element indication sending on described compatible carrier wave.
4. method according to claim 3, is characterized in that, described RRC configuration messages comprises: RRC connects reallocation message.
5. a carrier synchronization method, is characterized in that comprising:
User equipment (UE) receives the message that base station sends, and wherein said message carries the indication that new carrier wave is synchronous new carrier wave and/or asynchronous new carrier wave that is used to indicate of base station configuration;
Described UE is defined as the new carrier wave of described asynchronous new carrier wave according to described message, and carries out carrier synchronization on the new carrier wave of described asynchronous new carrier wave.
6. method according to claim 5, is characterized in that, described UE determines that according to described message asynchronous new carrier wave comprises:
Described message is the radio resource control RRC configuration messages that carries the parameter of described new carrier wave, wherein, described configuration operation is included in the parameter configuration of described new carrier wave and adds the indication that described new carrier wave is described asynchronous new carrier wave, and described UE determines described asynchronous new carrier wave according to described indication; Or
Described message is the RRC configuration messages that is added with synchronous new carrier list and/or asynchronous new carrier list, wherein, the carrier identification of carrying synchronous new carrier wave in described synchronous new carrier list, the carrier identification of carrying asynchronous new carrier wave in described asynchronous new carrier list, described UE determines one of in the following manner described asynchronous new carrier wave:
Determine that described carrier identification is that the new carrier wave of asynchronous new carrier wave is described asynchronous new carrier wave;
Determine that the new carrier wave of getting rid of outside the new carrier wave that described carrier identification is synchronous new carrier wave in the new carrier wave getting is described asynchronous new carrier wave; Or
Described message is to carry to be used to indicate the media access control MAC control element that described new carrier wave is described asynchronous new carrier wave, and described UE determines described asynchronous new carrier wave according to described MAC control element.
7. method according to claim 6, is characterized in that, described RRC configuration messages comprises: RRC connects reallocation message.
8. a carrier synchronization device, is applied to base station, it is characterized in that comprising:
Processing module, carries and is used to indicate new carrier wave for the indication of synchronous new carrier wave and/or asynchronous new carrier wave for message;
Sending module, sends to user equipment (UE) for base station by described message, triggers described UE and carry out carrier synchronization on described asynchronous new carrier wave.
9. device according to claim 8, is characterized in that, described processing module comprises:
The first configuration module, for the parameter of described new carrier wave being configured at radio resource control RRC configuration messages, wherein, described configuration operation is included in and in the parameter configuration of described new carrier wave, adds the indication that described new carrier wave is described synchronous new carrier wave or described asynchronous new carrier wave; Or
The second configuration module, for adding synchronous new carrier list and/or asynchronous new carrier list at described RRC configuration messages, wherein, in described synchronous new carrier list, carry the cell ID of synchronous new carrier wave, the carrier identification of carrying asynchronous new carrier wave in described asynchronous new carrier list; Or
The 3rd configuration module is described synchronous new carrier wave and/or described asynchronous new carrier wave for the described new carrier wave of media access control MAC control element indication sending on described compatible carrier wave.
10. a carrier synchronization device, is applied to user equipment (UE), it is characterized in that comprising:
Receiver module, the message sending for receiving base station, wherein said message carries the indication that new carrier wave is synchronous new carrier wave and/or asynchronous new carrier wave that is used to indicate of base station configuration;
The first determination module, for determining described asynchronous new carrier wave according to described message;
Synchronization module, for carrying out carrier synchronization on described asynchronous new carrier wave.
11. devices according to claim 10, is characterized in that, described the first determination module comprises:
The second determination module, for described message, it is the radio resource control RRC configuration messages that carries the parameter of described new carrier wave, wherein, described configuration operation is included in the parameter configuration of described new carrier wave and adds the indication that described new carrier wave is described asynchronous new carrier wave, and described UE determines that described indication determines described asynchronous new carrier wave; Or
The 3rd determination module, described RRC configuration messages for described message for the synchronous new carrier list of interpolation and/or asynchronous new carrier list, wherein, the carrier identification of carrying synchronous new carrier wave in described synchronous new carrier list, the carrier identification of carrying asynchronous new carrier wave in described asynchronous new carrier list, determine one of in the following manner described asynchronous new carrier wave:
Described carrier identification is that the new carrier wave of asynchronous new carrier wave is described asynchronous new carrier wave;
The new carrier wave of getting rid of in the new carrier wave receiving outside the new carrier wave that described carrier identification is synchronous new carrier wave is described asynchronous new carrier wave; Or
The 4th determination module, is to carry to be used to indicate the media access control MAC control element that described new carrier wave is described asynchronous new carrier wave for described message, according to described MAC control element, determines described asynchronous new carrier wave.
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| CN201210213494.2A CN103517399A (en) | 2012-06-26 | 2012-06-26 | Method and apparatus for carrier synchronization |
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