CN101594683B - Signal transmission method and system under carrier aggregation - Google Patents
Signal transmission method and system under carrier aggregation Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000008054 signal transmission Effects 0.000 title claims abstract description 35
- 230000002776 aggregation Effects 0.000 title claims abstract description 18
- 238000004220 aggregation Methods 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 71
- 239000000969 carrier Substances 0.000 claims abstract description 12
- 230000009466 transformation Effects 0.000 claims description 137
- 230000011664 signaling Effects 0.000 claims description 49
- 238000001228 spectrum Methods 0.000 abstract description 16
- 238000011144 upstream manufacturing Methods 0.000 description 15
- 125000004122 cyclic group Chemical group 0.000 description 14
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- 101100465000 Mus musculus Prag1 gene Proteins 0.000 description 1
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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
- H04W74/002—Transmission of channel access control information
- H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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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
Abstract
The invention relates to a signal transmission method and a signal transmission system under carrier aggregation. The method comprises that: a base station allocates a component carrier or physical uplink control channel PUCCH transmission parameters and/or sounding reference signal SRS transmission parameters of a plurality of component carriers, and sends the transmission parameters to UE; and the UE transmits PUCCH and/or SRS on corresponding component carriers respectively according to the transmission parameters of the component carriers. The PUCCH and SRS multiplex transmission method under the condition of the carrier aggregation is compatible with LET UE, can be used on multiple carriers without conflict, and can maximize the utilization efficiency of frequency spectrum.
Description
Technical field
The present invention relates to the communications field, the method for transmitting signals while relating in particular to a kind of carrier aggregation.
Background technology
Long Term Evolution (Long Term Evolution, referred to as LTE) system is the essential planning of third generation partnership.Fig. 1 shows the structural representation of basic frame structure in LTE system; As shown in Figure 1, frame structure is divided into radio frames, field, subframe, time slot and five grades of symbol.Wherein, the length of a radio frames is 10ms, and a radio frames is comprised of two fields, the length of each field is 5ms, and a field is comprised of 5 subframes, and the length of each subframe is 1ms, a subframe consists of two time slots, and the length of each time slot is 0.5ms.In each time slot, when regular circulation prefix, there is 7 single-carrier frequency division multiple access (SC-FDMA) symbol, when extended cyclic prefix, have 6 SC-FDMA symbols.
Measuring reference signals, also referred to as Sounding reference signal (Sounding Reference Signal, referred to as SRS) be a kind of subscriber equipment (User Equipment, referred to as UE) and base station between be used for measuring the signal of radio channel information (channel state information, referred to as CSI).In LTE, subscriber equipment (UE) is according to the parameters such as bandwidth, frequency domain position, cycle and sub-frame offset of base station (e-node-B, referred to as eNB) indication, timed sending uplink SRS.ENB judges the up CSI of UE according to the SRS signal receiving, and according to the CSI obtaining, carries out the operations such as frequency domain selection scheduling, closed-loop power control.
In LTE, UE only sends SRS on last symbol of subframe.UE sends configuration and four relating to parameters of SRS in time domain: the cycle (T of community proprietary (cell-specific)
sFC) and sub-frame offset (Δ
sFC), and the cycle (T of UE proprietary (UE-specific)
sRS) and sub-frame offset (T
offset).
Table 1,2 has provided respectively the cycle of cell-specific in Frequency Division Duplexing (FDD) (FDD) and time division duplex (TDD) system (also referred to as configuration cycle, Configuration Period) and sub-frame offset (also referred to as transmission biasing, Transmission offset).The cycle of cell-specific and sub-frame offset have provided the time domain subframe position that all UE in community may send SRS, and in other subframes, and last SC-FDMA symbol can not be used for sending SRS.As shown in Figure 2, the SRS sub-frame configuration srsSubframeConfiguration=7 in table 1 of take is example, T
sFC=5, Δ
sFC=0,1}, and in community, cell-specific SRS transmission cycle is 5 subframes, the subframe 0 in each cycle and subframe 1 position can be used for sending SRS by the UE in community.
| srsSubframeConfiguration | Binary | Configuration Peri od T SFC (subframes) | Transmission offset Δ SFC (subframes) |
| 0 | 0000 | 1 | {0} |
| 1 | 0001 | 2 | {0} |
| 2 | 0010 | 2 | {1} |
| 3 | 0011 | 5 | {0} |
| 4 | 0100 | 5 | {1} |
| 5 | 0101 | 5 | {2} |
| 6 | 0110 | 5 | {3} |
| 7 | 0111 | 5 | {0，1} |
| 8 | 1000 | 5 | {2，3} |
| 9 | 1001 | 10 | {0} |
| 10 | 1010 | 10 | {1} |
| 11 | 1011 | 10 | {2} |
| 12 | 1100 | 10 | {3} |
| 13 | 1101 | 10 | {0，1，2，3，4，6，8} |
| 14 | 1110 | 10 | {0，1，2，3，4，5，6， 8} |
| 15 | 1111 | reserved | reserved |
Table 1:FDD SRS sub-frame configuration
| srsSubframeConfiguration | Binary | Confguration Period T SFC (subframes) | Transmission offset Δ SFC (subframes) |
| 0 | 0000 | 5 | {1} |
| 1 | 0001 | 5 | {1，2} |
| 2 | 0010 | 5 | {1，3} |
| 3 | 0011 | 5 | {1，4} |
| 4 | 0100 | 5 | {1，2，3} |
| 5 | 0101 | 5 | {1，2，4} |
| 6 | 0110 | 5 | {1，3，4} |
| 7 | 0111 | 5 | {1，2，3，4} |
| 8 | 1000 | 10 | {1，2，6} |
| 9 | 1001 | 10 | {1，3，6} |
| 10 | 1010 | 10 | {1，6，7} |
| 11 | 1011 | 10 | {1，2，6，8} |
| 12 | 1100 | 10 | {1，3，6，9} |
| 13 | 1101 | 10 | {1，4，6，7} |
| 14 | 1110 | reserved | reserved |
| 15 | 1111 | reserved | reserved |
Table 2:TDD SRS sub-frame configuration
Table 3 and table 4 have provided respectively in FDD and TDD system, and the SRS of UE-specific sends cycle (SRS Periodicity) and sub-frame offset (SRS Subframe Offset).The cycle of UE-specific and sub-frame offset have provided time domain cycle and the subframe position of certain UE transmission SRS.As shown in Figure 3, with SRS configuration index in table 3 (SRS Configuration Index) I
sRS=17 is example, and the every 20ms of UE sends a SRS reference signal, in its time-domain position first subframe in 20ms, sends.
| SRS Configuration Index I SRS | SRS Periodicity T SRS(ms) | SRS Subframe Offset T offset |
| 0-1 | 2 | I SRS |
| 2-6 | 5 | I SRS-2 |
| 7-16 | 10 | I SRS-7 |
| 17-36 | 20 | I SRS-17 |
| 37-76 | 40 | I SRS-37 |
| 77-156 | 80 | I SRS-77 |
| 157-316 | 160 | I SRS-157 |
| 317-636 | 320 | I SRS-317 |
| 637-1023 | reserved | reserved |
Table 3:FDD UE Specific SRS sends cycle T
sRSwith sub-frame offset T
offset
| Configuration Index I SRS | SRS Periodicity T SRS(ms) | SRS |
| 0 | 2 | 0，1 |
| 1 | 2 | 0，2 |
| 2 | 2 | 1，2 |
| 3 | 2 | 0，3 |
| 4 | 2 | 1，3 |
| 5 | 2 | 0，4 |
| 6 | 2 | 1，4 |
| 7 | 2 | 2，3 |
| 8 | 2 | 2，4 |
| 9 | 2 | 3，4 |
| 10-14 | 5 | I SRS-10 |
| 15-24 | 10 | I SRS-15 |
| 25-44 | 20 | I SRS-25 |
| 45-84 | 40 | I SRS-45 |
| 85-164 | 80 | I SRS-85 |
| 165-324 | 160 | I SRS-165 |
| 325-644 | 320 | I SRS-325 |
| 645-1023 | reserved | reserved |
Table 4:TDD UE Specific SRS sends cycle T
sRSwith sub-frame offset T
offset
LTE has defined Physical Uplink Control Channel (Physical Uplink Control Channel, referred to as PUCCH), be used for sending upstream control signaling, comprise uplink scheduling request (SchedulingRequest, referred to as SR), ack/nack response message (Acknowledged/Non-acknowledged, referred to as ACK/NACK), channel quality indication (Channel QualityIndicator, referred to as CQI), pre-coding matrix indication (Precoding Matrix Indicator, be called for short PMI), and space order indication (Rank Indicator, referred to as RI).
The form of PUCCH (format) is divided into six kinds of format 1, format 1a, format 1b and format 2, format 2a, format 2b; Wherein, format 1 is for transmitting the uplink scheduling request information of 1 bit, indicates or there is no a SR; Format 1a is for transmitting the ACK/NACK information of the single codeword stream of 1 bit; Format 1b is for transmitting the ACK/NACK information of two streams of code words of 2 bits, wherein, and the ACK/NACK information of each streams of code words correspondence 1 bit; Format 2 is for transmitting CQI/PMI and RI information; Format 2a is used for transmitting CQI/PMI/RI information and single codeword stream ACK/NACK information; Format 2b is used for transmitting CQI/PMI/RI information and two streams of code words ACK/NACK information; PUCCH format 2a and format 2b are the scene of regular circulation prefix for Cyclic Prefix.
Fig. 4 shows the frequency domain position schematic diagram of Physical Uplink Control Channel in LTE system; Wherein, n
pRBfor RB (Resource Block, Resource Block) call number, m is PUCCH channel logo; As shown in Figure 4, the resource of two Resource Block of each PUCCH channel occupancy, its frequency domain is 12 subcarriers, time domain is 14 symbols (regular circulation prefix) or 12 symbols (extended cyclic prefix).
For PUCCH format1/1a/1b, the ACK/NACK information of the SR information of 1 bit or 1 bit/2 bit will be passed through frequency domain expansion, expands on 12 subcarriers of PUCCH channel.For PUCCH format2/2a/2b, the CQI/PMI/RI that it is entrained, also needs through frequency domain expansion, expands on 12 subcarriers of PUCCH channel.PUCCH frequency domain expansion code (also referred to as frequency domain expansion sequence) used is to take computer search that a length is 12 CAZAC (ConstantAmplitude Zero Auto-correlation Code out, permanent width zero auto-correlation) sequence, as basic sequence, obtains through cyclic shift.
The in the situation that of regular circulation prefix, described frequency domain expansion sequence is reused 7 times, on 12 frequency domain positions on each symbol of a Resource Block, shine upon a described sequence.For PUCCHformat2/2a/2b, each time slot (#0 wherein, #2, #3, #4, #6) sequence on symbol is as the transfer of data of PUCCH channel, each time slot (#1, #5) sequence on symbol is as the transmission of the demodulated reference signal (Demodulation Reference Signal, referred to as DMRS) of PUCCH channel, as shown in Figure 5.For PUCCH format1/1a/1b, wherein (#0, the #1 of each time slot, #5, #6) sequence on symbol is as the transfer of data of PUCCH channel, each time slot (#2, #3, #4) sequence on symbol is as the transmission of the DMRS of PUCCH channel, as shown in Figure 6.
The in the situation that of extended cyclic prefix, described frequency domain expansion sequence is reused 6 times, on 12 frequency domain positions on each symbol of a Resource Block, shine upon a described sequence.For PUCCHformat2, wherein the sequence on each time slot (#0, #1, #3, #4, #5) symbol is as the transfer of data of PUCCH channel, and the sequence on each time slot (#2) symbol is as the DMRS transmission of PUCCH channel, as shown in Figure 7.For PUCCH format1/1a/1b, wherein (#0, the #1 of each time slot, #4, #5) sequence on symbol is as the transfer of data of PUCCH channel, each time slot (#2, #3) sequence on symbol is as the transmission of the DMRS of PUCCH channel, as shown in Figure 8.
For PUCCH format1/1a/1b, the SR information of 1 bit, or the ACK/NACK information of 1 bit/2 bit is through frequency domain expansion, after expanding on 12 subcarriers of PUCCH channel, also need, by time domain orthogonal code (Orthogonal sequences), to expand to 4
Or 3
In time-domain symbol, selected time domain extended code respectively as shown in table 5 and table 6, the cyclic shift quantity and the time-gap number (n that by the PUCCH format 1/1a/1b on PUCCH resource index, component carrier, are used
s) etc. parameter table look-up definite.
| Sequence index n oc(n s) | Orthogonal sequences [w(0)…w(N SF PUCCH-1)] |
| 0 | [+1 +1 +1 +1] |
| 1 | [+1 -1 +1 -1] |
| 2 | [+1 -1 -1 +1] |
Table 5: time domain orthogonal code
| Sequence index n oc(n s) | Orthogonal sequences [w(0)…w(N SF PUCCH-1)] |
| 0 | [ 1 1 1] |
| 1 | [1 e j2π/3 e j4π/3] |
| 2 | [1 e j4π/3 e j2π/3] |
Table 6: time domain orthogonal code
As shown in Figure 9, when PUCCH format1/1a/1b is by time domain orthogonal code, while expanding in 3 time-domain symbol, PUCCH has been used less a SC-FDMA symbol in a time slot, only use 6 symbols (regular circulation prefix) or 5 symbols (extended cyclic prefix), this structure is called the brachymemma structure of PUCCH.At this moment last symbol in this time slot can be used for sending SRS by UE.
In LTE, in order to make UE keep lower power PAR (Peak to Average PowerRatio, be called for short PAPR), need in up link, remain single-carrier property when UE sends data, these data that just require UE to send must be continuous on frequency domain.Yet, as shown in Figure 4, the two ends that the frequency domain position of PUCCH is whole frequency band, and the frequency domain position of SRS is not connected with PUCCH conventionally, so for a UE, PUCCH and SRS can not send simultaneously, so just need to consider in a subframe both multiplexing methods.
In LTE, whether PUCCH and SRS can multiplexingly depend on the form of PUCCH, and the top signaling (Simultaneous-AN-and-SRS) for represent whether to allow PUCCH and SRS to transmit simultaneously, and follow following principle:
In the sub-frame offset that UE in community can only allow at cell-specific, send SRS, in other subframe position, can not send SRS, and UE can only send SRS on last symbol in subframe;
If UE has PUCCH format 2/2a/2b to send, in this subframe, can not send SRS; This is because PUCCH format 2/2a/2b does not have brachymemma structure, in order to guarantee the single-carrier property on last character position, therefore can not send SRS;
If UE has PUCCH format 1/1a/1b to send, and top signaling Simultaneous-AN-and-SRS is False (not allowing PUCCH and SRS to transmit) simultaneously, UE can not send SRS; This is due in this case, and PUCCH format 1/1a/1b does not adopt brachymemma structure, is bonding carrier characteristics, and UE can not in the end send SRS on a character position;
If UE has PUCCH format 1/1a/1b to send, and top signaling Simultaneous-AN-and-SRS is Ture (allowing PUCCH and SRS to transmit) simultaneously, UE can be used the brachymemma structure of PUCCH in subframe, to send PUCCH, and in the end a symbol sends SRS; In addition, all UE in community will adopt brachymemma structure to send PUCCH in this case, to avoid the causing interference between PUCCH to strengthen because orthogonal code length is different.
LTE-Advanced (senior Long Term Evolution, also referred to as Further Advancements forE-UTRA) is the evolution version of LTE.Except meeting or surpassing 3GPP TR 25.913: all related needs of " Requirementsfor Evolved UTRA (E-UTRA) and Evolved UTRAN (E-UTRAN) " (" demand of the global communication wireless access of evolution and the universal mobile telecommunications system land radio access web of evolution "), also will meet or exceed the demand of the IMT-Advanced that ITU-R (Union of International Telecommunication is wireless department) proposes.Wherein, refer to the demand of LTE backward compatibility: the terminal of LTE can be worked in the network of LTE-Advanced; The terminal of LTE-Advanced can be worked in the network of LTE.
In addition, LTE-Advanced should be able to, at the spectrum disposition of different sizes, comprise work under the spectrum disposition wider than LTE (as the continuous frequency spectrum resource of 100MHz), to reach higher performance and target peak speed.Because LTE-Advanced network needs to access LTE user, so its operational frequency bands need to cover current LTE frequency range, in this frequency range, there is not the spectral bandwidth of assignable continuous 100MHz.So the technical problem that LTE-Advanced need to solve is that several continuous component carrier frequency (frequency spectrum) (Component carrier) that are distributed on different frequency range are aggregating and form the operable 100MHz bandwidth of LTE-Advanced.For the frequency spectrum after polymerization, be divided into n component carrier frequency (or component carrier) (Component carrier), the frequency spectrum in each component carrier frequency (or component carrier) is continuous.
LTE-Advanced spectrum disposition is comprised of spectrum aggregation (carrieraggregation) a plurality of component carrier frequency; Wherein, the gathering of above-mentioned frequency spectrum can be the gathering of continuous frequency spectrum, can be also the gathering of discontinuous spectrum.LTE UE can access the frequency band of compatible LTE, and LTE-A UE can access the frequency band of LTE compatibility, also can access the frequency band of LTE-Advanced.For TDD system, frequency spectrum can be polymerized by a plurality of component carrier frequency, is to be both useful on up subframe in each component carrier frequency, is also useful on descending subframe.For FDD system, uplink spectrum and downstream spectrum are all polymerized by component carrier frequency, and upstream components carrier number and downlink component carrier number can be identical, also can be different.
Consider and the compatibility of LTE, each component carrier frequency of LTE-Advanced can be used for sending PUCCH and/or SRS.This considers how on a plurality of component carriers, to process the transmission problem of PUCCH and/or SRS with regard to needs, and the current concrete grammar that also PUCCH and SRS is not carried out multiplexing transmission when carrier aggregation.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the deficiencies in the prior art, and method for transmitting signals when a kind of carrier aggregation is provided and system, to realize the multiplexing transmission to PUCCH and SRS when the carrier aggregation.
In order to address the above problem, the method for transmitting signals while the invention provides a kind of carrier aggregation, the method comprises:
Base station is Physical Uplink Control Channel PUCCH transformation parameter and/or the measuring reference signals SRS transformation parameter of user equipment (UE) configuration one-component carrier wave or a plurality of component carriers, and above-mentioned transformation parameter is sent to UE;
UE transmits PUCCH and/or SRS according to the described transformation parameter of each component carrier at corresponding component carrier respectively.
In addition in the SRS transformation parameter of described component carrier, comprise: for representing whether to allow on described component carrier the top signaling of transmitting SRS and PUCCH simultaneously;
When UE need to allow the subframe transmitting SRS of transmitting SRS and form in the corresponding component carrier of described SRS transformation parameter, be 1, during the PUCCH of 1a or 1b:
If the top signaling on described component carrier allows to transmit PUCCH and SRS on described component carrier simultaneously, UE is used brachymemma structural transmission PUCCH in this subframe of this component carrier, and on last symbol of this subframe transmitting SRS; If the top signaling on described component carrier does not allow to transmit PUCCH and SRS on described component carrier simultaneously, UE is used conventional form transmission PUCCH in this subframe of this component carrier, and abandons SRS.
In addition, base station sends to described UE by described PUCCH transformation parameter on the descending sub frame of downlink component carrier or component carrier;
Described UE knows according to the signaling of the rule setting in advance or base station transmission the PUCCH transformation parameter institute respective components carrier wave carrying on the descending sub frame of described downlink component carrier or component carrier.
In addition, base station sends to described UE by described SRS transformation parameter on the descending sub frame of downlink component carrier or component carrier;
Described UE knows according to the signaling of the rule setting in advance or base station transmission the SRS transformation parameter institute respective components carrier wave carrying on the descending sub frame of described downlink component carrier or component carrier.
In addition UE transmitting SRS on last symbol of the subframe of component carrier only.
In addition, when need to allowing the subframe transmitting SRS of transmitting SRS and form in component carrier, UE is 2, during the PUCCH of 2a or 2b, this subframe transmission PUCCH of UE on this component carrier, and abandon SRS.
Signal transmission system when the present invention also provides a kind of carrier aggregation, this system comprises UE and base station, it is characterized in that, in described base station, is provided with: transformation parameter dispensing unit and transformation parameter transmitting element; In described UE, be provided with: transformation parameter receiving element and signal transmission unit; Wherein:
Described transformation parameter dispensing unit is used to PUCCH transformation parameter and/or the SRS transformation parameter of described UE configuration one-component carrier wave or a plurality of component carriers, and is outputed to described transformation parameter transmitting element;
Described transformation parameter transmitting element is for sending to described UE by described PUCCH transformation parameter and/or SRS transformation parameter;
Described transformation parameter receiving element is used for receiving described PUCCH transformation parameter and/or SRS transformation parameter, and is outputed to described signal transmission unit;
Described signal transmission unit is for transmitting PUCCH and/or SRS according to the described transformation parameter of each component carrier at corresponding component carrier respectively.
In addition in the SRS transformation parameter of described component carrier, comprise: for representing whether to allow on described component carrier the top signaling of transmitting SRS and PUCCH simultaneously;
When described signal transmission unit need to allow the subframe transmitting SRS of transmitting SRS and form in the corresponding component carrier of described SRS transformation parameter, be 1, during the PUCCH of 1a or 1b:
If the top signaling on described component carrier allows to transmit PUCCH and SRS on described component carrier simultaneously, described signal transmission unit is used brachymemma structural transmission PUCCH in this subframe of this component carrier, and on last symbol of this subframe transmitting SRS; If the top signaling on described component carrier does not allow to transmit PUCCH and SRS on described component carrier simultaneously, described signal transmission unit is used conventional form transmission PUCCH in this subframe of this component carrier, and abandons SRS.
In addition, when described signal transmission unit need to allow the subframe transmitting SRS of transmitting SRS and form in the corresponding component carrier of described SRS transformation parameter, be 2, during the PUCCH of 2a or 2b:
This subframe transmission PUCCH of described signal transmission unit on this component carrier, and abandon SRS.
In addition, described transformation parameter transmitting element sends to described UE by described PUCCH transformation parameter on the descending sub frame of downlink component carrier or component carrier;
Described signal transmission unit knows according to the signaling of the rule setting in advance or base station transmission the PUCCH transformation parameter institute respective components carrier wave carrying on the descending sub frame of described downlink component carrier or component carrier.
In addition, described transformation parameter transmitting element sends to described UE by described SRS transformation parameter on the descending sub frame of downlink component carrier or component carrier;
Described signal transmission unit knows according to the signaling of the rule setting in advance or base station transmission the SRS transformation parameter institute respective components carrier wave carrying on the descending sub frame of described downlink component carrier or component carrier.
In sum, the multiplex transmission method of the present invention PUCCH and SRS under state of carrier aggregation is compatible LTE UE both, can on a plurality of carrier waves, use by ensuring escapement from confliction again, and can maximize the utilization ratio of frequency spectrum.
Accompanying drawing explanation
Fig. 1 is the wireless frame structure schematic diagram of LTE system;
Fig. 2 is that the SRS of LTE system cell-specific sends cycle (T
sFC) and sub-frame offset (Δ
sFC) schematic diagram;
Fig. 3 is that the SRS of LTE system UE-specific sends cycle (T
sRS) and sub-frame offset (T
offset) schematic diagram;
Fig. 4 is LTE system physical ascending control channel frequency domain position schematic diagram;
When Fig. 5 is LTE system convention Cyclic Prefix, PUCCH format 2/2a/2b time-frequency position view;
When Fig. 6 is LTE system convention Cyclic Prefix, PUCCH format 1/1a/1b time-frequency position view;
When Fig. 7 is LTE system extension Cyclic Prefix, PUCCH format 2/2a/2b time-frequency position view;
When Fig. 8 is LTE system extension Cyclic Prefix, PUCCH format 1/1a/1b time-frequency position view;
Fig. 9 is LTE system PUCCH and SRS when multiplexing, the brachymemma structural representation of employing;
Method for transmitting signals flow chart when Figure 10 is carrier aggregation of the present invention;
Signal transmission system structural representation when Figure 11 is carrier aggregation of the present invention.
Embodiment
Core concept of the present invention is that base station is PUCCH transformation parameter and the SRS transformation parameter that UE configures respectively each component carrier, and above-mentioned transformation parameter is sent to UE; UE transmits PUCCH and/or SRS according to the above-mentioned transformation parameter of each component carrier at corresponding component carrier respectively.
Below in conjunction with drawings and Examples, describe the present invention.
Method for transmitting signals flow chart when Figure 10 is carrier aggregation of the present invention, comprises the steps:
1001: base station configures PUCCH transformation parameter for transmitting the component carrier of PUCCH, and configures respectively SRS transformation parameter for transmitting the component carrier of uplink SRS.
Above-mentioned SRS transformation parameter including (but not limited to) following one or more:
In above-mentioned PUCCH transformation parameter including (but not limited to) following one or more:
pUCCH resource index on component carrier;
1002: base station sends to UE by the PUCCH transformation parameter of each component carrier at specific downlink component carrier (FDD system) or on the descending sub frame (TDD system) of specific component carrier; And the SRS transformation parameter of each component carrier is sent to UE at specific downlink component carrier (FDD system) or on the descending sub frame (TDD system) of specific component carrier.
Base station and UE can make an appointment PUCCH transformation parameter that the descending sub frame of above-mentioned specific downlink component carrier or certain components carrier wave carries for configuring the PUCCH transmission of which component carrier; The PUCCH transformation parameter that base station also can be carried by the descending sub frame of the above-mentioned specific downlink component carrier of signaling UE or certain components carrier wave transmits for configuring the PUCCH of which component carrier.
Equally, base station and UE can make an appointment SRS transformation parameter that the descending sub frame of above-mentioned specific downlink component carrier or certain components carrier wave carries for configuring the SRS transmission of which component carrier; The SRS transformation parameter that base station also can be carried by the descending sub frame of the above-mentioned specific downlink component carrier of signaling UE or certain components carrier wave transmits for configuring the SRS of which component carrier.
That is to say, UE can be known PUCCH transformation parameter and the corresponding component carrier of SRS transformation parameter receiving according to predefined rule; The signaling that also can send according to base station is known PUCCH transformation parameter and the corresponding component carrier of SRS transformation parameter receiving.
1003:UE judges whether to transmit PUCCH and SRS in the subframe of this component carrier according to the above-mentioned PUCCH transformation parameter of each component carrier and SRS transformation parameter and following principle respectively simultaneously, to carry out the transmission of PUCCH and/or SRS:
in base station, do not allow the subframe of UE transmitting SRS, can transmit PUCCH, can not transmitting SRS;
Below in conjunction with 6 application examples of the present invention, said method is elaborated.
Wherein, in application example 1～3, suppose and adopt FDD system, upstream components carrier number is 2, is respectively component carrier 1 (CC1) and component carrier 2 (CC2); Supposing the system adopts regular circulation prefix (sending method of extended cyclic prefix is similar with it), and UE needs to transmit PUCCH and SRS on these two component carriers.
application example 1
Base station configures PUCCH transformation parameter for transmitting the component carrier of PUCCH, and for transmitting the component carrier configuration SRS transformation parameter of uplink SRS; And each group PUCCH transformation parameter sends to UE on certain specific downlink component carrier, each group SRS transformation parameter sends to UE on certain specific downlink component carrier.
UE determines PUCCH that each component carrier is proprietary and the multiplexing method (judging whether to allow at this component carrier multiplexing transmission PUCCH and SRS) of SRS according to the above-mentioned transformation parameter that receives; Suppose that UE need to transmit PUCCH format 2/2a/2b on CC1 and CC2:
It should be noted that PUCCH on a upstream components carrier wave (as CC1) and SRS multiplexing method and other upstream components carrier waves (as CC2) are irrelevant.
application example 2
Base station configures PUCCH transformation parameter for transmitting the component carrier of PUCCH, and for transmitting the component carrier configuration SRS transformation parameter of uplink SRS; And each group PUCCH transformation parameter sends to UE on certain specific downlink component carrier, each group SRS transformation parameter sends to UE on certain specific downlink component carrier.
UE determines PUCCH that each component carrier is proprietary and the multiplexing method (judging whether to allow at this component carrier multiplexing transmission PUCCH and SRS) of SRS according to the above-mentioned transformation parameter that receives; Suppose that UE need to transmit PUCCH format 2/2a/2b on CC1, on CC2, transmit PUCCHformat 1/1a/1b:
If top signaling does not allow to transmit PUCCH and SRS at CC2 simultaneously, UE is at this subframe transmission PUCCH, not transmitting SRS;
If top signaling allows to transmit PUCCH and SRS at CC2 simultaneously, UE is used brachymemma structural transmission PUCCH in this subframe, and on last symbol of this subframe transmitting SRS.
It should be noted that PUCCH on upstream components carrier wave (as CC1) and SRS multiplexing method and other upstream components carrier waves (as CC2) are irrelevant.
application example 3
Base station configures PUCCH transformation parameter for transmitting the component carrier of PUCCH, and for transmitting the component carrier configuration SRS transformation parameter of uplink SRS; And each group PUCCH transformation parameter transmits on certain specific downlink component carrier, each group SRS transformation parameter transmits on certain specific downlink component carrier.
UE determines PUCCH that each component carrier is proprietary and the multiplexing method (judging whether to allow at this component carrier multiplexing transmission PUCCH and SRS) of SRS according to the above-mentioned transformation parameter that receives; Suppose that UE need to transmit PUCCH format 1/1a/1b on CC1 and CC2:
in base station, do not allow the subframe of CC1 and the CC2 of UE transmitting SRS, can transmit PUCCHformat 1/1a/1b, and can not transmitting SRS;
If top signaling does not allow to transmit PUCCH and SRS at CC1 simultaneously, UE adopts conventional form transmission PUCCH, not transmitting SRS in this subframe;
If top signaling allows to transmit PUCCH and SRS at CC1 simultaneously, UE is used brachymemma structural transmission PUCCH in this subframe, and on last symbol of this subframe transmitting SRS.
subframe on the CC2 of base station permission UE transmitting SRS if UE need to transmit PUCCHformat 1/1a/1b, judges whether to allow to transmit PUCCH and SRS at CC2 according to the top signaling in the SRS transformation parameter of CC2 simultaneously:
If top signaling does not allow to transmit PUCCH and SRS at CC2 simultaneously, UE adopts conventional form transmission PUCCH, not transmitting SRS in this subframe;
If top signaling allows to transmit PUCCH and SRS at CC2 simultaneously, UE is used brachymemma structural transmission PUCCH in this subframe, and on last symbol of this subframe transmitting SRS.
It should be noted that PUCCH on upstream components carrier wave (as CC1) and SRS multiplexing method and other upstream components carrier waves (as CC2) are irrelevant.
In following application example 4～6, to suppose and adopt TDD system, component carrier number is 2, is respectively component carrier 1 (CC1) and component carrier 2 (CC2); Supposing the system adopts regular circulation prefix (sending method of extended cyclic prefix is similar with it), and UE needs to transmit PUCCH and SRS on these two component carriers.
application example 4
Base station configures PUCCH transformation parameter for transmitting the component carrier of PUCCH, and for transmitting the component carrier configuration SRS transformation parameter of uplink SRS; And each group PUCCH transformation parameter sends to UE on the descending sub frame of certain specific component carrier, each group SRS transformation parameter sends to UE on the descending sub frame of certain specific component carrier.
UE determines PUCCH that each component carrier is proprietary and the multiplexing method (judging whether to allow at this component carrier multiplexing transmission PUCCH and SRS) of SRS according to the above-mentioned transformation parameter that receives; Suppose that UE need to transmit PUCCH format 2/2a/2b on CC1 and CC2:
It should be noted that PUCCH on a upstream components carrier wave (as CC1) and SRS multiplexing method and other upstream components carrier waves (as CC2) are irrelevant.
application example 5
Base station configures PUCCH transformation parameter for transmitting the component carrier of PUCCH, and for transmitting the component carrier configuration SRS transformation parameter of uplink SRS; And each group PUCCH transformation parameter sends to UE on the descending sub frame of certain specific component carrier, each group SRS transformation parameter sends to UE on the descending sub frame of certain specific component carrier.
UE determines PUCCH that each component carrier is proprietary and the multiplexing method (judging whether to allow at this component carrier multiplexing transmission PUCCH and SRS) of SRS according to the above-mentioned transformation parameter that receives; Suppose that UE need to transmit PUCCH format 2/2a/2b on CC1, on CC2, transmit PUCCHformat 1/1a/1b:
If top signaling does not allow to transmit PUCCH and SRS at CC2 simultaneously, UE is at this subframe transmission PUCCH, not transmitting SRS;
If top signaling allows to transmit PUCCH and SRS at CC2 simultaneously, UE is used brachymemma structural transmission PUCCH in this subframe, and on last symbol of this subframe transmitting SRS.
It should be noted that PUCCH on upstream components carrier wave (as CC1) and SRS multiplexing method and other upstream components carrier waves (as CC2) are irrelevant.
application example 6
Base station configures PUCCH transformation parameter for transmitting the component carrier of PUCCH, and for transmitting the component carrier configuration SRS transformation parameter of uplink SRS; And each group PUCCH transformation parameter transmits on certain specific downlink component carrier, each group SRS transformation parameter transmits on certain specific downlink component carrier.
UE determines PUCCH that each component carrier is proprietary and the multiplexing method (judging whether to allow at this component carrier multiplexing transmission PUCCH and SRS) of SRS according to the above-mentioned transformation parameter that receives; Suppose that UE need to transmit PUCCH format 1/1a/1b on CC1 and CC2:
in base station, allow the CC1 of UE transmitting SRS and the subframe of CC2, if UE does not have PUCCH to need transmission, can transmitting SRS;
If top signaling does not allow to transmit PUCCH and SRS at CC1 simultaneously, UE adopts conventional form transmission PUCCH, not transmitting SRS in this subframe;
If top signaling allows to transmit PUCCH and SRS at CC1 simultaneously, UE is used brachymemma structural transmission PUCCH in this subframe, and on last symbol of this subframe transmitting SRS.
If top signaling does not allow to transmit PUCCH and SRS at CC2 simultaneously, UE adopts conventional form transmission PUCCH, not transmitting SRS in this subframe;
If top signaling allows to transmit PUCCH and SRS at CC2 simultaneously, UE is used brachymemma structural transmission PUCCH in this subframe, and on last symbol of this subframe transmitting SRS.
It should be noted that PUCCH on upstream components carrier wave (as CC1) and SRS multiplexing method and other upstream components carrier waves (as CC2) are irrelevant.
It should be noted that, except LTE-Advanced system, said method of the present invention can also be applied to other system.
Signal transmission system structural representation when Figure 11 is carrier aggregation of the present invention; As shown in figure 11, this system comprises UE and base station, in base station, is provided with: transformation parameter dispensing unit and transformation parameter transmitting element; In UE, be provided with: transformation parameter receiving element and signal transmission unit; Wherein:
Transformation parameter dispensing unit is used to PUCCH transformation parameter and/or the SRS transformation parameter of UE configuration one-component carrier wave or a plurality of component carriers, and is outputed to transformation parameter transmitting element;
Transformation parameter transmitting element for sending to UE by PUCCH transformation parameter and/or SRS transformation parameter on the descending sub frame of downlink component carrier or component carrier;
Transformation parameter receiving element is used for receiving PUCCH transformation parameter and/or SRS transformation parameter, and is outputed to signal transmission unit;
Signal transmission unit is for transmitting PUCCH and/or SRS according to the transformation parameter of each component carrier at corresponding component carrier respectively.
Wherein, signal transmission unit can be known PUCCH transformation parameter and the SRS transformation parameter institute respective components carrier wave carrying on the descending sub frame of downlink component carrier or component carrier according to the signaling of the rule setting in advance or base station transmission.
In the SRS transformation parameter of component carrier, can comprise: for representing whether to allow on component carrier the top signaling of transmitting SRS and PUCCH simultaneously; When signal transmission unit need to allow the subframe transmitting SRS of transmitting SRS and form in the corresponding component carrier of SRS transformation parameter, be 1, during the PUCCH of 1a or 1b:
If the top signaling on component carrier allows to transmit PUCCH and SRS on component carrier simultaneously, signal transmission unit is used brachymemma structural transmission PUCCH in this subframe of this component carrier, and on last symbol of this subframe transmitting SRS; If the top signaling on component carrier does not allow to transmit PUCCH and SRS on component carrier simultaneously, signal transmission unit is used conventional form transmission PUCCH in this subframe of this component carrier, and abandons SRS.
When signal transmission unit need to allow the subframe transmitting SRS of transmitting SRS and form in the corresponding component carrier of SRS transformation parameter, be 2, during the PUCCH of 2a or 2b, this subframe transmission PUCCH of signal transmission unit on this component carrier, and abandon SRS.
Claims (7)
1. method for transmitting signals during carrier aggregation, is characterized in that, the method comprises:
Base station is Physical Uplink Control Channel PUCCH transformation parameter and/or the measuring reference signals SRS transformation parameter of user equipment (UE) configuration one-component carrier wave or a plurality of component carriers, and above-mentioned transformation parameter is sent to UE;
UE transmits PUCCH and/or SRS according to the described transformation parameter of each component carrier at corresponding component carrier respectively;
Wherein, base station sends to described UE by described PUCCH and/or SRS transformation parameter on the descending sub frame of downlink component carrier or component carrier;
Described UE knows according to the signaling of the rule setting in advance or base station transmission PUCCH and/or the SRS transformation parameter institute respective components carrier wave carrying on the descending sub frame of described downlink component carrier or component carrier.
2. the method for claim 1, is characterized in that,
In the SRS transformation parameter of described component carrier, comprise: for representing whether to allow on described component carrier the top signaling of transmitting SRS and PUCCH simultaneously;
When UE need to allow the subframe transmitting SRS of transmitting SRS and form in the corresponding component carrier of described SRS transformation parameter, be 1, during the PUCCH of 1a or 1b:
If the top signaling on described component carrier allows to transmit PUCCH and SRS on described component carrier simultaneously, UE is used brachymemma structural transmission PUCCH in this subframe of this component carrier, and on last symbol of this subframe transmitting SRS; If the top signaling on described component carrier does not allow to transmit PUCCH and SRS on described component carrier simultaneously, UE is used conventional form transmission PUCCH in this subframe of this component carrier, and abandons SRS.
3. the method for claim 1, is characterized in that,
UE is transmitting SRS on last symbol of the subframe of component carrier only.
4. the method for claim 1, is characterized in that,
When UE need to allow the subframe transmitting SRS of transmitting SRS and form in component carrier, be 2, during the PUCCH of 2a or 2b, this subframe transmission PUCCH of UE on this component carrier, and abandon SRS.
5. signal transmission system during carrier aggregation, this system comprises UE and base station, it is characterized in that, in described base station, is provided with: transformation parameter dispensing unit and transformation parameter transmitting element; In described UE, be provided with: transformation parameter receiving element and signal transmission unit; Wherein:
Described transformation parameter dispensing unit is used to PUCCH transformation parameter and/or the SRS transformation parameter of described UE configuration one-component carrier wave or a plurality of component carriers, and is outputed to described transformation parameter transmitting element;
Described transformation parameter transmitting element is for sending to described UE by described PUCCH transformation parameter and/or SRS transformation parameter;
Described transformation parameter receiving element is used for receiving described PUCCH transformation parameter and/or SRS transformation parameter, and is outputed to described signal transmission unit;
Described signal transmission unit is for transmitting PUCCH and/or SRS according to the described transformation parameter of each component carrier at corresponding component carrier respectively;
Wherein, described transformation parameter transmitting element sends to described UE by described PUCCH and/or SRS transformation parameter on the descending sub frame of downlink component carrier or component carrier;
Described signal transmission unit knows according to the signaling of the rule setting in advance or base station transmission PUCCH and/or the SRS transformation parameter institute respective components carrier wave carrying on the descending sub frame of described downlink component carrier or component carrier.
6. system as claimed in claim 5, is characterized in that,
In the SRS transformation parameter of described component carrier, comprise: for representing whether to allow on described component carrier the top signaling of transmitting SRS and PUCCH simultaneously;
When described signal transmission unit need to allow the subframe transmitting SRS of transmitting SRS and form in the corresponding component carrier of described SRS transformation parameter, be 1, during the PUCCH of 1a or 1b:
If the top signaling on described component carrier allows to transmit PUCCH and SRS on described component carrier simultaneously, described signal transmission unit is used brachymemma structural transmission PUCCH in this subframe of this component carrier, and on last symbol of this subframe transmitting SRS; If the top signaling on described component carrier does not allow to transmit PUCCH and SRS on described component carrier simultaneously, described signal transmission unit is used conventional form transmission PUCCH in this subframe of this component carrier, and abandons SRS.
7. system as claimed in claim 5, is characterized in that,
When described signal transmission unit need to allow the subframe transmitting SRS of transmitting SRS and form in the corresponding component carrier of described SRS transformation parameter, be 2, during the PUCCH of 2a or 2b:
This subframe transmission PUCCH of described signal transmission unit on this component carrier, and abandon SRS.
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2009
- 2009-06-19 CN CN200910150607.7A patent/CN101594683B/en not_active Expired - Fee Related
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2010
- 2010-05-12 WO PCT/CN2010/072690 patent/WO2010145361A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006020568A1 (en) * | 2004-08-11 | 2006-02-23 | Interdigital Technology Corporation | Channel sounding for improved system performance |
| CN1801689A (en) * | 2005-10-27 | 2006-07-12 | 华为技术有限公司 | Method for realizing multi-carrier EV-DO system reverse traffic channel control information |
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| Title |
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| 3GPP.Technical Specification Group Radio Access Network.《3GPP TS 36.213 V8.6.0》.2009, * |
| LTE-Advanced – Evolving LTE towards IMT-Advanced;Stefan Parkvall等;《Vehicular Technology Conference (VTC-Fall), 2008 IEEE 68th》;20080924;第1页第9段-第2页第18段 * |
| Stefan Parkvall等.LTE-Advanced – Evolving LTE towards IMT-Advanced.《Vehicular Technology Conference (VTC-Fall), 2008 IEEE 68th》.2008, |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101594683A (en) | 2009-12-02 |
| WO2010145361A1 (en) | 2010-12-23 |
| WO2010145361A9 (en) | 2011-03-03 |
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