CN102264139A - Method for transmitting uplink reference signal in long term evolution-advanced (LTE-A) carrier aggregation system, and base station and terminal of LTE-A carrier aggregation system - Google Patents
Method for transmitting uplink reference signal in long term evolution-advanced (LTE-A) carrier aggregation system, and base station and terminal of LTE-A carrier aggregation system Download PDFInfo
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Abstract
The invention provides a method for transmitting an uplink reference signal in a long term evolution-advanced (LTE-A) carrier aggregation system, and a base station and a terminal of the LTE-A carrier aggregation system. According to one embodiment of the invention, the method comprises the following steps that: the base station generates a control signaling for detecting a uplink channel quality, and sends the control signaling to the terminal, wherein the control signaling comprises a carrier identifier; and the terminal receives the control signaling, and sends the uplink reference signal on the carrier corresponding to the carrier identifies. According to the invention, the terminal can send the uplink reference signal on the carrier in a non-activated state or in a non-configured state, so that the base station can acquire the uplink channel quality of the carriers so as to activate or configure the uplink carriers for the terminal more reasonably. Furthermore, through the carrier identifier in the control signaling for detecting the uplink channel quality, the terminal can determine the carrier for sending the uplink reference signal.
Description
Technical field
The application relates to LTE-A carrier aggregation system uplink reference signals transmission method and base station and terminal.
Background technology
In the later release of 3GPP Long Term Evolution (LTE) (being called LTE-Advanced or LTE-A), introduced many new technology, and carrier aggregation (carrier aggregation) technology is as supporting that more the technology of high bandwidth transmission also is introduced into wherein.The basic principle of carrier aggregation is by work that a plurality of main carriers are condensed together, thereby satisfies higher bandwidth demand.
After introducing carrier aggregation technology, the base station at first disposes up or descending carrier wave to terminal, and these carrier waves will be in unactivated state this moment.When the base station wishes that terminal when certain carrier wave that is in unactivated state carries out work (that is, in the enterprising line data transmitting-receiving of this carrier wave), then is configured to state of activation with this carrier wave.
Dispatch for the ascending resource to terminal the base station, need obtain the uplink signal-channel quality of terminal on certain carrier wave, therefore, the base station need be carried out uplink signal-channel quality detecting usually, with according to the foundation of the channel quality that calculates as the dispatch terminal ascending resource.
In the uplink reference signals transmission method of existing LTE-A carrier aggregation system, the ascending time slot (tdd mode) of up-link carrier (fdd mode) or carrier wave is at first activated in the base station for terminal.Then, the base station produces the control signaling that is used for the uplink signal-channel quality detecting according to demand and sends to terminal, and the signaling content generally includes the bandwidth of uplink reference signals transmission, cycle (can be 10ms usually) of transmission or the like.After terminal is received the control signaling, can send uplink reference signals to the base station according to the configuration requirement in the control signaling on the carrier wave ascending time slot of up-link carrier of working or work.
As can be seen, in existing uplink reference signals transmission method, terminal can only go up at the carrier wave (that is, being in the carrier wave of state of activation) of work and send uplink reference signals.And in carrier aggregation scene, but the base station may need to obtain those and be configured to terminal be in unactivated state or not have the uplink signal-channel quality of the carrier wave of configuration to be used as the reference that the terminal up-link carrier disposes.In addition, under the carrier aggregation scene,, then can't tell and on which carrier wave, send uplink reference signals based on present control signaling if terminal communicates on a plurality of up-link carriers.
Summary of the invention
Refer to not clear problem in order to solve the control signaling that prior art is used for up-link carrier channel quality detecting, the application has proposed the base station and the terminal of a kind of LTE-A carrier aggregation system uplink reference signals transmission method, LTE-A carrier aggregation system.
According to the application's first aspect, LTE-A carrier aggregation system uplink reference signals transmission method is provided, comprising: the base station generates the control signaling that is used for the uplink signal-channel quality detecting and sends to terminal, and described control signaling comprises carrier identification; And described terminal receives described control signaling, sends uplink reference signals on the carrier wave corresponding with described carrier identification.
According to the application on the other hand, provide the base station of LTE-A carrier aggregation system, having comprised: the signaling generation module, generate the control signaling that is used for the uplink signal-channel quality detecting, described control signaling comprises carrier identification; Signaling sending module sends to terminal with described control signaling; And the reference signal receiver module, receive the uplink reference signals that described terminal sends on the carrier wave corresponding with described carrier identification.
According to the application's another aspect, the terminal of LTE-A carrier aggregation system is provided, comprising: control signaling receiver module, receive the control signaling that is used for the uplink signal-channel quality detecting that the base station sends, wherein, described control signaling comprises carrier identification; And the reference signal sending module, on the carrier wave corresponding, send the uplink reference signals that generates according to described control signaling with described carrier identification
According to the application, terminal can be in configuration but unactivated state or do not send uplink reference signals on the carrier wave of configuration status, thereby the base station can obtain the uplink signal-channel quality of these carrier waves, thereby more reasonably is terminal activation or collocating uplink carrier wave.In addition, by the carrier identification that the control signaling that is used for the uplink signal-channel quality detecting comprises, terminal can determine send uplink reference signals on which carrier wave.
Description of drawings
Fig. 1 is the flow chart according to the LTE-A carrier aggregation system uplink reference signals transmission method of an embodiment of the application;
Fig. 2 is the block diagram according to the base station of the LTE-A carrier aggregation system of an embodiment of the application;
Fig. 3 is the block diagram according to the base station of the LTE-A carrier aggregation system of another embodiment of the application;
Fig. 4 is the block diagram according to the base station of the LTE-A carrier aggregation system of the another embodiment of the application; And
Fig. 5 is the block diagram according to the terminal of the LTE-A carrier aggregation system of an embodiment of the application.
Embodiment
With reference to the accompanying drawings, the specific embodiments to the application is elaborated.For simplicity's sake, in the explanation of each embodiment of the application, identical or similarly the device or step use same or analogous Reference numeral to represent.
At first, the LTE-A carrier aggregation system uplink reference signals transmission method according to an embodiment of the application is described with reference to Fig. 1.
As shown in Figure 1, in step 1002, the base station can generate and include control signaling carrier identification, that be used for uplink signal-channel quality detecting, and should control signaling and send to terminal.In step 1004, terminal can receive the control signaling that the base station sends, with the control signaling in institute comprise on the pairing carrier wave of carrier identification and send uplink reference signals.
According to method shown in Figure 1, terminal not only can send uplink reference signals being on the carrier wave of state of activation, and, even if the carrier wave of the control carrier identification correspondence that signaling comprised is in unactivated state or is in not configuration status, terminal still can send uplink reference signals on this carrier wave, therefore, be applicable to more under the carrier aggregation scene of LTE-A system that the base station is terminal configuration up-link carrier or the application that activates up-link carrier for terminal.
In illustrated method, the carrier identification that the control signaling that is used for the uplink signal-channel quality detecting that the base station generates is comprised can be the information that can identify certain carrier wave identity, for example, the Cell ID (cell ID) of carrier wave or Cell Index (cell index) or frequency etc.Alternatively, can also make terminal on all possible up-link carrier, send the uplink reference signals of identical configuration by the mode of the prior agreement of for example terminal and base station.Be appreciated that except carrier identification the control signaling also can comprise the information such as bandwidth that known uplink reference signals sends.
As an embodiment, RRC (Radio Resource control, Radio ResourceControl) layer dedicated control signaling can be passed through in the base station or system broadcast information sends the control signaling that is generated.In the present embodiment, carrier identification can be included among the SoundingRS-UL-ConfigComm of RRC signaling, perhaps be included among the SoundingRS-UL-ConfigDedicated of RRC signaling, perhaps be included among the SoundingRS-UL-ConfigComm and SoundingRS-UL-ConfigDedicated of RRC signaling data.
After the base station receives the uplink reference signals of terminal according to method transmission shown in Figure 1, can calculate the uplink signal-channel quality of the carrier wave corresponding according to the uplink reference signals that receives with carrier identification.According to reference signal calculating channel method for quality is well-known, herein not to its detailed description.
According to the application's a specific embodiments, the control signaling that is generated by the base station also can comprise the zero hour and the finish time that uplink reference signals sends except comprising aforesaid carrier identification.In this embodiment, receive the terminal of controlling signaling and can between the zero hour and the finish time, send uplink reference signals.
According to another specific embodiments, but the control signaling carrier identification, the zero hour, the finish time and the cycle that generate by the base station.Here, the cycle can be set to 10ms with reference to normal conditions.Alternatively, the cycle also can be set to greater than 10ms, and 30ms for example is to reduce power consumption of terminal.In this embodiment, the terminal that receives the control signaling can be between the zero hour and the finish time, sends uplink reference signals according to the cycle.
Be appreciated that in the LTE-A carrier aggregation system terminal sends the time of uplink reference signals and should stagger on different carrier.Therefore, the base station can be the zero hour, the finish time and the cycle of terminal configuration at different carrier in the control signaling, and the time that this terminal is sent uplink reference signals on different carrier staggers.
Alternatively, the zero hour, the finish time and the cycle that uplink reference signals sends also can be by making an appointment between base station and terminal, rather than send control signaling to determine by the base station.Similarly, by the zero hour, the finish time and cycle are configured, the time that makes described terminal send uplink reference signals on different carrier can stagger.
As described above, the uplink signal-channel quality of specific carriers can be calculated according to each uplink reference signals in the base station that receives uplink reference signals.Be appreciated that when terminal repeatedly sent uplink reference signals between the zero hour and the finish time, the base station can calculate a plurality of uplink signal-channel qualities of specific carriers.At this moment, statistical computation can be carried out to a plurality of uplink signal-channel qualities that calculate in the base station, to obtain the uplink signal-channel quality statistical value of this carrier wave.Be appreciated that and adopt arithmetic mean method that a plurality of uplink signal-channel qualities are carried out statistical computation, also can adopt geometric average method that a plurality of uplink signal-channel qualities are carried out statistical computation, obtain the uplink signal-channel quality statistical value of specific carriers.
Be appreciated that, carry out statistical computation by a plurality of uplink signal-channel qualities and obtain the uplink signal-channel quality statistical value within a certain period of time specific carriers, can assess the channel quality in this specific carriers a period of time, the base station can be defined as terminal configuration or activate which up-link carrier by the uplink signal-channel quality statistical value of different carrier in a period of time compared.
Below with reference to Fig. 2, the base station according to the LTE-A carrier aggregation system of an embodiment of the application is described.
As shown in Figure 2, the base station 20 in the LTE-A carrier aggregation system can comprise signaling generation module 202, signaling sending module 204 and reference signal receiver module 206.Signaling generation module 202 can generate and comprise control signaling carrier identification, that be used for the uplink signal-channel quality detecting, and signaling sending module 204 can send to terminal 22 with the control signaling that signaling generation module 202 generates.But the uplink reference signals that reference signal receiver module 206 receiving terminals send on the carrier wave corresponding with carrier identification.
Similarly, the carrier identification in the control signaling that signaling generation module 202 generated of base station 20 can be Cell ID or the Cell Index or the frequency etc. of carrier wave.
As an embodiment, the signaling sending module 304 of base station 30 can send the control signaling that is generated by rrc layer dedicated control signaling or system broadcast information.Particularly, carrier identification can be included among the SoundingRS-UL-ConfigComm of RRC signaling, perhaps be included among the SoundingRS-UL-ConfigDedicated of RRC signaling, perhaps be included among the SoundingRS-UL-ConfigComm and SoundingRS-UL-ConfigDedicated of RRC signaling.
Fig. 3 shows the base station according to the LTE-A carrier aggregation system of another embodiment of the application.As shown in the figure, base station 30 in the LTE-A carrier aggregation system can comprise signaling generation module 302, signaling sending module 304, reference signal receiver module 306 and computing module 308, wherein, signaling generation module 302, signaling sending module 304 and reference signal receiver module 306 are similar with signaling generation module 202, signaling sending module 204 and reference signal receiver module 206 shown in Figure 2 respectively.Computing module 308 can calculate the uplink signal-channel quality of carrier wave according to the uplink reference signals that receives by reference signal receiver module 306.
As a specific embodiments, the control signaling that the signaling generation module of base station is generated also can comprise the zero hour and the finish time.In addition, the control signaling also can comprise the cycle, and wherein, the cycle can be set to 10ms with reference to normal conditions, perhaps also can be set to greater than 10ms, to reduce power consumption of terminal.In the LTE-A carrier aggregation system, can in the control signaling that the signaling generation module generates, be the zero hour, the finish time and the cycle of terminal configuration at different carrier, the time that this terminal is sent uplink reference signals on different carrier staggers.
Below with reference to Fig. 4, the base station according to the LTE-A carrier aggregation system of the another embodiment of the application is described.
As shown in Figure 5, base station 40 can comprise signaling generation module 402, signaling sending module 404, reference signal receiver module 406, computing module 408 and statistical module 410.Signaling generation module 402 can generate the control signaling, and wherein, the control signaling can comprise information such as carrier identification, the zero hour, the finish time, and alternatively, the control signaling also can comprise the cycle.Signaling sending module 404 can send to terminal 42 with the control signaling that generates.But the uplink reference signals that reference signal receiver module 406 receiving terminals send on the carrier wave corresponding with carrier identification, and computing module 408 can calculate the uplink signal-channel quality of carrier wave according to the uplink reference signals that receives.Be appreciated that, comprise the zero hour, the finish time etc. during information in the control signaling, terminal 42 can repeatedly send uplink reference signals between the zero hour and the finish time, thereby computing module 408 can calculate a plurality of uplink signal-channel qualities of carrier wave between the zero hour and the finish time.A plurality of uplink signal-channel qualities of the carrier wave that statistical module 410 can calculate computing module 408 carry out statistical computation, to obtain the uplink signal-channel quality statistical value of described carrier wave.
Similarly, statistical module 410 can adopt arithmetic mean method that a plurality of uplink signal-channel qualities are carried out statistical computation, also can adopt geometric average method that a plurality of uplink signal-channel qualities are carried out statistical computation, obtains the uplink signal-channel quality statistical value of specific carriers.The base station can be assessed the channel quality in this specific carriers a period of time, thereby be defined as terminal configuration or activate which up-link carrier by the uplink signal-channel quality statistical value of specific carriers.
Below with reference to Fig. 5, describe terminal in detail according to the LTE-A carrier aggregation system of an embodiment of the application.
As shown in Figure 5, terminal 50 can comprise control signaling receiver module 502 and reference signal sending module 504.Control signaling receiver module 502 can receive comprising of base station 52 transmissions of control signaling carrier identification, that be used for the uplink signal-channel quality detecting.Reference signal sending module 504 can be on the carrier wave corresponding with described carrier identification, send uplink reference signals, be in configuration but un-activation or configuration status not even if be appreciated that certain carrier wave, terminal shown in Figure 5 still can send uplink reference signals on this carrier wave.
Be appreciated that, the control signaling that sends in the base station comprises the zero hour and the finish time etc. during information, reference signal sending module 504 can send uplink reference signals between this zero hour and this specific finish time, perhaps between this zero hour and this specific finish time, according to certain cycle transmission uplink reference signals.
Abovely be described with reference to the exemplary embodiment of accompanying drawing to the application.It should be appreciated by those skilled in the art that above-mentioned embodiment only is for illustrative purposes and the example of being lifted, rather than be used for limiting.All in the application instruction and the claim protection range under done any modification, be equal to replacement etc., all should be included in the claimed scope of the application.
Claims (23)
1.LTE-A carrier aggregation system uplink reference signals transmission method comprises:
The base station generates the control signaling that is used for the uplink signal-channel quality detecting and sends to terminal, and described control signaling comprises carrier identification; And
Described terminal receives described control signaling, sends uplink reference signals on the carrier wave corresponding with described carrier identification.
2. the method for claim 1, wherein described carrier identification is cell ID Cell ID or cell index Cell Index or frequency.
3. the method for claim 1, wherein described base station sends described control signaling by rrc layer dedicated control signaling or system broadcast information.
4. the method for claim 1, wherein described carrier identification is included among the SoundingRS-UL-ConfigComm and/or SoundingRS-UL-ConfigDedicated of RRC signaling.
5. the method for claim 1, further comprise: the uplink signal-channel quality of described carrier wave is calculated according to uplink reference signals in described base station.
6. the method for claim 1, wherein described control signaling also comprises the zero hour, the finish time, and the described terminal that receives described control signaling sends uplink reference signals between the described zero hour and the described finish time.
7. method as claimed in claim 6, wherein, described control signaling also comprises the cycle, the described terminal that receives described control signaling sends uplink reference signals according to the described cycle between the described zero hour and the described finish time.
8. the method for claim 1, wherein described terminal is preset with the zero hour, the finish time and cycle, and the described terminal that receives described control signaling sends uplink reference signals according to the described cycle between the described zero hour and the described finish time.
9. as each described method in the claim 6 to 8, further comprise:
The uplink signal-channel quality of described carrier wave is calculated according to each uplink reference signals in described base station; And
Statistical computation is carried out to the uplink signal-channel quality of the described carrier wave that the uplink reference signals that sends according to described terminal calculates in described base station between the described zero hour and the described finish time, to obtain the uplink signal-channel quality statistical value of described carrier wave.
10. as claim 7 or 8 described methods, wherein, by the zero hour, the finish time and cycle are configured, the time that makes described terminal send uplink reference signals on different carrier staggers.
11. comprising, the method for claim 1, wherein described carrier wave is in state of activation, unactivated state or the carrier wave of configuration status not.
12.LTE-A the base station of carrier aggregation system comprises:
The signaling generation module generates the control signaling that is used for the uplink signal-channel quality detecting, and described control signaling comprises carrier identification;
Signaling sending module sends to terminal with described control signaling; And
The reference signal receiver module receives the uplink reference signals that described terminal sends on the carrier wave corresponding with described carrier identification.
13. base station as claimed in claim 12, wherein, described carrier identification is cell ID Cell ID or cell index Cell Index or frequency.
14. base station as claimed in claim 12, wherein, described signaling sending module sends described control signaling by rrc layer dedicated control signaling or system broadcast information.
15. base station as claimed in claim 12, wherein, described signaling generation module is included in described carrier identification among the SoundingRS-UL-ConfigComm and/or SoundingRS-UL-ConfigDedicated of RRC signaling.
16. base station as claimed in claim 12 further comprises: computing module, according to described uplink reference signals, calculate the uplink signal-channel quality of described carrier wave.
17. base station as claimed in claim 12, wherein, described control signaling also comprises the zero hour and the finish time.
18. base station as claimed in claim 17, wherein, described control signaling also comprises the cycle.
19., further comprise as claim 17 or 18 described base stations:
Computing module according to described uplink reference signals, calculates the uplink signal-channel quality of described carrier wave; And
Statistical module, the uplink signal-channel quality of the described carrier wave that described computing module is calculated carries out statistical computation, to obtain the uplink signal-channel quality statistical value of described carrier wave.
20. base station as claimed in claim 18, wherein, described signaling generation module was configured the zero hour, the finish time and cycle, and the time that makes described terminal send uplink reference signals on different carrier staggers.
21.LTE-A the terminal of carrier aggregation system comprises:
Control signaling receiver module receives the control signaling that is used for the uplink signal-channel quality detecting that the base station sends, and wherein, described control signaling comprises carrier identification; And
The reference signal sending module on the carrier wave corresponding with described carrier identification, sends uplink reference signals.
22. terminal as claimed in claim 21, wherein, described reference signal sending module sends uplink reference signals according to specific period between the specific zero hour and specific finish time.
23. terminal as claimed in claim 21, wherein, described terminal is being in state of activation, unactivated state or is not sending uplink reference signals on the carrier wave of configuration status.
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Application publication date: 20111130 |