CN101389120B - Method and device for transmitting ACK/NACK signal - Google Patents
Method and device for transmitting ACK/NACK signal Download PDFInfo
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Abstract
The invention discloses a method for ACK/NACK transmission, comprising determining frequency resource used for ACK/NACK signal transmission in the pilot timeslot; notifying configuration information of resource used for ACK/NACK signal transmission to user equipments UE in the cell; transmitting ACK/NACK signal on frequency resource determined in the pilot timeslot. Comparing with technique in prior art, transmitting ACK/NACK signal in pilot timeslot not only enhances utilization of frequency resource of pilot timeslot, but also increases use of the pilot timeslot, having no influence to data transmission rate of conventional timeslots. Furthermore, the method for transmitting ACK/NACK signal in pilot timeslot can be combined with the ACK/NACK signal transmission method in prior art, so as to reach a better embodiment effect. The invention further discloses an apparatus for ACK/NACK signal transmission.
Description
Technical field
The present invention relates to the Long Term Evolution of TDD (time division duplex) system, relate in particular to the method and apparatus of a kind of transferring ACK/NACK signal.
Background technology
At present, 3GPP (third generation partner program) tissue has set about beginning its existing system standard is carried out long-term evolution.In the middle of numerous physical layer transmission technology, OFDM (OFDM) technology is with its higher availability of frequency spectrum, and lower processing complexity becomes the first-selection in all descending schemes.
Be a kind of multi-carrier modulation communication technology on the OFDM technological essence, its basic principle is to be decomposed into several rate data streams to the data flow of a two-forty on one group of mutually orthogonal subcarrier, to transmit simultaneously.The OFDM technology is because its multicarrier character has performance advantage aspect a lot.
A significant advantage of OFDM technology is exactly data parallel transmissions on a plurality of subcarriers respectively, and the length of the symbol on each subcarrier increases accordingly, and is insensitive to channel delay; Add protection on each symbol at interval through further giving, promptly introduce CP (Cyclic Prefix) under the situation of channel delay, can eliminate ISI (intersymbol interference) fully less than circulating prefix-length.Like this, each subcarrier has all experienced flat fading channel.In addition, the OFDM technology also has advantages such as the ability of availability of frequency spectrum height, anti-narrow band interference and frequency selective fading is stronger.
In the evolution scheme of TDD system, the transmission of data division can be adopted the OFDM mode.Subframe structure in the TDD system evolved scheme is as shown in Figure 1, and the time span of a sub-frame is 5ms (millisecond), be divided into 7 common time slots (TS0～TS6) and three special time slots (and DwPTS, GP, UpPTS).
UpPTS (uplink pilot time slot) only is used for UE (subscriber equipment) and sends the UpPCH signal at random access procedure, and DwPTS (descending pilot frequency time slot) only is used for network side and sends P-SCH (primary synchronization channel) signal.
Because in the evolution scheme of TDD system, UpPTS is not used in the transmission data, and its unique purposes is that UE sends the UpPCH signal in random access procedure, and the shared resource of UpPCH signal seldom, causes the resource utilization of UpPTS very low.In like manner, DwPTS also is not used in the transmission data, and its unique purposes is that network side sends the P-SCH signal that is used for down-going synchronous, and the P-SCH signal only takies the fixedly bandwidth of 1.25MHz, and to the system of bandwidth greater than 1.25MHz, remaining running time-frequency resource is wasted.
Summary of the invention
In view of this, technical problem to be solved by this invention provides the method for a kind of transferring ACK/NACK signal, to improve the resource utilization of UpPTS and DwPTS.
Another technical problem that the present invention solves provides the device of a kind of transferring ACK/NACK signal.
For this reason, technical scheme provided by the invention is following:
The method of a kind of transferring ACK/NACK signal comprises:
Confirm in uplink pilot time slot, to be used to transmit the frequency resource of uplink ACK/NACK signal, said frequency resource is the residual frequency resource except that the special frequency resource that sends ascending pilot frequency physical channel UpPCH among the uplink pilot time slot UpPTS;
To comprise the interior user equipment (UE) of configuration information of resource notifying cell that is used to transmit uplink ACK/NACK signal;
On the frequency resource of confirming described in the uplink pilot time slot, receive uplink ACK/NACK signal.
Preferably, confirm in uplink pilot time slot, to transmit the frequency resource of uplink ACK/NACK signal by pre-configured frequency resource.
Preferably, by pre-configured frequency resource selection strategy, confirm in uplink pilot time slot, to transmit the frequency resource of uplink ACK/NACK signal.
Preferably, the mode of transmission uplink ACK/NACK signal is a coherent manner, or incoherent mode.
Preferably, when adopting coherent manner transmission uplink ACK/NACK signal, frequency pilot sign and uplink ACK/NACK signal time division multiplexing, or frequency division multiplexing.
The device of a kind of transferring ACK/NACK signal comprises:
Resource is confirmed the unit; Be used for confirming the frequency resource that is used to send uplink ACK/NACK signal at uplink pilot time slot, said frequency resource is the residual frequency resource except that the special frequency resource that sends ascending pilot frequency physical channel UpPCH among the uplink pilot time slot UpPTS;
Notification unit is used for the interior user equipment (UE) of configuration information of resource notifying cell that is used to transmit uplink ACK/NACK signal with comprising;
Transmission unit is used on the frequency resource of confirming described in the uplink pilot time slot, receiving uplink ACK/NACK signal.
Preferably, resource confirms that the unit confirms in uplink pilot time slot, to transmit the frequency resource of uplink ACK/NACK signal by pre-configured frequency resource.
Preferably, resource confirms that the unit by pre-configured frequency resource selection strategy, confirms in uplink pilot time slot, to transmit the frequency resource of uplink ACK/NACK signal.
Can find out; In terms of existing technologies, at pilot time slot transmission uplink ACK/NACK signal, not only can improve the frequency resource utilance of pilot time slot; Also increased the purposes of pilot time slot, and the message transmission rate of conventional time slot has also been had no influence.In addition, can also the method for the method of transmitting uplink ACK/NACK signal at pilot time slot and existing transmission uplink ACK/NACK signal be used, thereby reach the better implement effect.
Description of drawings
Fig. 1 is the subframe structure sketch map in the TDD system evolved scheme;
Fig. 2 is the sketch map that in the Long Term Evolution scheme, in UpPTS, sends the UpPCH signal;
Fig. 3 is the flow chart at UpPTS transmission uplink ACK/NACK signal provided by the invention;
Fig. 4-1,4-2 are respectively the sketch mapes that frequency pilot sign and uplink ACK/NACK signal time division multiplexing, frequency division multiplexing transmit;
Fig. 5 is the sketch map that in the Long Term Evolution scheme, in DwPTS, sends P-SCH;
Fig. 6 is the method flow diagram at DwPTS transferring ACK/NACK signal provided by the invention;
Fig. 7-1,7-2 adopt coherent manner, incoherent mode to transmit the sketch map of descending ack/nack signal at DwPTS;
Fig. 8 is the schematic representation of apparatus of transferring ACK provided by the invention/NACK signal.
Embodiment
Fig. 2 is the sketch map that in the Long Term Evolution scheme, in UpPTS, sends the UpPCH signal, and the dash area among the figure representes to be used to send the frequency resource of UpPCH signal.Can find out, will have a large amount of frequency resources to be wasted in vain if UpPTS only is used to send the UpPCH signal.
Below, further specifying in conjunction with 1 pair of method at UpPTS transmission uplink ACK/NACK signal provided by the invention of embodiment, Fig. 3 shows the flow process at UpPTS transmission uplink ACK/NACK signal.
In step 31, confirm in UpPTS, to be used to transmit the frequency resource of uplink ACK/NACK signal.
Because it is limited in UpPTS, being used to transmit the frequency resource of UpPCH, therefore, will there be a large amount of residual frequency resources to be available for transmitting uplink ACK/NACK signal when system bandwidth greatly the time.Concrete which residual frequency resource transmission uplink ACK/NACK signal that adopts, mode has multiple.
A kind of mode can be: the pre-configured residual frequency resource that is used to transmit uplink ACK/NACK signal, adopt the residual frequency resource of said configuration to be used to transmit uplink ACK/NACK signal regularly and get final product.Adopt the benefit of this mode to be, realize simply the processing complexity when having reduced actual motion.
Another kind of mode is: pre-configured frequency resource selection strategy, dynamically select to be used to transmit the residual frequency resource of uplink ACK/NACK signal according to said frequency resource selection strategy.Adopt the benefit of this mode to be, when actual motion, can select to be used to transmit the residual frequency resource of descending ack/nack signal more neatly according to the operating position of frequency resource.
In step 32, will comprise the interior UE of configuration information of resource notifying cell that is used to transmit uplink ACK/NACK signal.
Resource described here had both comprised time interval resource, and promptly UpPTS also comprises the frequency resource of confirming in the step 31.
Can give all UE in the sub-district with said configuration information broadcast announcement through system message, for example configuration information is broadcast to all UE in the sub-district through D-BCCH.Also can notify each UE respectively with said configuration information through the scheduling controlling channel.
In step 33, on the frequency resource of confirming described in the UpPTS, receive uplink ACK/NACK signal.
After UE receives said resource allocation information, can learn transmission uplink ACK/employed time interval resource of NACK signal and frequency resource.
UE is normal to receive descending control data or business datum, and utilizes the correspondent frequency resource to send uplink ACK/NACK signal at UpPTS.
Need to prove; Said configuration information not only includes only time interval resource and the frequency resource information that is used to transmit uplink ACK/NACK signal, also should comprise mode, the transmission sign indicating number sequence that uplink ACK/the NACK signal is adopted and the corresponding relation of uplink ACK/NACK signal and descending scheduling control channel of transmission uplink ACK/NACK signal.
Wherein, the mode of transmission uplink ACK/NACK signal comprises coherent manner and incoherent mode.If adopt coherent manner transmission uplink ACK/NACK signal; Promptly in transmission signals, comprise frequency pilot sign; Then when detecting uplink ACK/NACK signal; At first the demodulation pilot frequency symbol carries out channel estimating according to frequency pilot sign again and obtains the up channel parameter, receives ack/nack signal according to this channel parameter then.If adopt incoherent mode to transmit uplink ACK/NACK signal, promptly do not comprise frequency pilot sign in the signal of transmission, direct demodulation upward signal then, detection ack/nack signal.When adopting coherent manner transmission uplink ACK/NACK signal, frequency pilot sign and ack/nack signal both can time division multiplexinges, also can frequency division multiplexing.
Fig. 4-the 1st, the sketch map of frequency pilot sign and uplink ACK/NACK signal time division multiplexing transmission; Fig. 4-the 2nd, the sketch map of frequency pilot sign and uplink ACK/NACK signal frequency division multiplexing transmission.
In Fig. 4-1, frequency pilot sign adopts short sign format, and the OFDM symbol of this frequency pilot sign and transmission uplink ACK/NACK signal carries out multiplexing in time domain, all use all frequency resources of confirming in the step 31 to transmit.
In Fig. 4-2, dash area is represented frequency pilot sign, and frequency pilot sign is placed on the non-conterminous subcarrier of two OFDM symbol frequency domains.Be that it is that remaining subcarrier then is used to transmit uplink ACK/NACK signal on 6 the OFDM subcarrier that the frequency pilot sign among Fig. 4-2 is placed on frequency domain interval with different among Fig. 4-1.
Because ack/nack signal only need transmit 1bit or 2bits information, therefore can adopt the mode of yard sequence to transmit, like ZC sequence commonly used, the different UEs in the same sub-district can be distinguished through the different phase shifts of ZC sequence.
When adopting incoherent mode to transmit uplink ACK/NACK signal, also can adopt similar with random access leader sequence signal structure.
Can find out, in terms of existing technologies,, not only can improve the frequency resource utilance of UpPTS, also increase the purposes of UpPTS, and the message transmission rate of conventional time slot is also had no influence at UpPTS transmission uplink ACK/NACK signal.In addition, can also the method for the method of transmitting uplink ACK/NACK signal at UpPTS and existing transmission uplink ACK/NACK signal be used, thereby reach the better implement effect.
Through embodiment 1, after the method at UpPTS transmission uplink ACK/NACK signal described,, the method for transmitting descending ack/nack signal at DwPTS is further specified below in conjunction with embodiment 2.
At present, in the Long Term Evolution scheme, descending ack/nack signal is not also had clear and definite regulation, the common recognition of tentatively reaching comprises:
1, when resource allocation confirmation signal implicit expression is carried ack/nack signal, just no longer needs explicit ACK/NACK channel;
2,1 ~ 3 OFDM symbol of ACK/NACK channel occupancy, the TDD mode maybe be with the difference of up-downgoing ratio, and the OFDM symbolic number that the ACK/NACK channel needs can increase.
Fig. 5 shows in the Long Term Evolution scheme, in DwPTS, only utilizes the limited number of sub-carrier of frequency band central authorities to send P-SCH, and dash area representes to be used to send the subcarrier of P-SCH among the figure.Wherein, said limited number of sub-carrier can be called special frequency resource.When system bandwidth is big, a large amount of residual frequency resources except that special frequency resource will be arranged.Can find out through above-mentioned analysis, can utilize the descending ack/nack signal of residual frequency resource transmission among the DwPTS.
For making those skilled in the art can understand the present invention better, specify below in conjunction with 2 couples of the embodiment method of transmitting descending ack/nack signal at DwPTS provided by the invention, Fig. 6 shows the flow process of this method.
In step 61, confirm in DwPTS, to be used to transmit the frequency resource of descending ack/nack signal.
Because it is limited in DwPTS, being used to transmit the special frequency resource of P-SCH, therefore, will there be a large amount of residual frequency resources to be available for transmitting descending ack/nack signal when system bandwidth greatly the time.The concrete descending ack/nack signal of which residual frequency resource transmission that adopts, mode has multiple.
A kind of mode can be: the residual frequency resource of descending ack/nack signal is transmitted in pre-configured fixing being used to.Another kind of mode is: according to the frequency resource selection strategy of configuration, dynamically select to be used to transmit the residual frequency resource of descending ack/nack signal.
In step 62, will comprise the interior UE of configuration information of resource notifying cell that is used to transmit descending ack/nack signal.
Resource described here had both comprised time interval resource, and promptly DwPTS also comprises the frequency resource of confirming in the step 61.
Can give all UE in the sub-district with said configuration information broadcast announcement through system message, for example configuration information is broadcast to all UE in the sub-district through D-BCCH.Also can notify each UE respectively with said configuration information through the scheduling controlling channel.
When needs send descending ack/nack signal, in step 63, send descending ack/nack signal in the frequency resource of confirming described in the DwPTS.
After UE receives the said resource allocation information that sends the base station, can learn transmission employed time interval resource of descending ack/nack signal and frequency resource.
UE is normal to send up control data or business datum, and waits for the descending ack/nack signal of reception in the corresponding frequencies resource of DwPTS.
Need to prove; Said configuration information not only includes only time slot, the frequency resource information that is used to transmit descending ack/nack signal, also should comprise the mode, the transmission sign indicating number sequence that descending ack/nack signal adopted and the corresponding relation of descending ack/nack signal and uplink scheduling control channel that transmit descending ack/nack signal.
Wherein, the mode of transmitting descending ack/nack signal comprises coherent manner and incoherent mode.If adopt coherent manner to transmit descending ack/nack signal, promptly in transmission signals, comprise frequency pilot sign, then UE can estimate channel according to frequency pilot sign, and then detects descending ack/nack signal.If adopt incoherent mode to transmit descending ack/nack signal, promptly do not comprise frequency pilot sign in the signal of transmission, then UE can directly carry out the incoherent signal detection, detects descending ack/nack signal.
Fig. 7-1,7-2 show respectively at DwPTS and adopt coherent manner, incoherent mode to transmit the sketch map of descending ack/nack signal.
Transmit sign indicating number sequence that descending ack/nack signal adopts and can be ZC (Zadoff-Chu) sequence or other auto-correlation, the good sequence of cross-correlation performance.
Can find out, in terms of existing technologies, transmit descending ack/nack signal, not only can improve the frequency resource utilance of DwPTS, also increase the purposes of DwPTS, and the message transmission rate of conventional time slot is also had no influence at DwPTS.In addition, can also the method for the method of transmitting descending ack/nack signal at DwPTS and the descending ack/nack signal of existing transmission be used, thereby reach the better implement effect.
Be based on the method for pilot time slot transferring ACK/NACK signal, the invention allows for accordingly at the device of pilot time slot transferring ACK/NACK signal, Fig. 8 is this schematic representation of apparatus.
The device of transferring ACK/NACK signal comprises: resource is confirmed cell S 81, notification unit S82 and transmission unit S83.
When utilizing UpPTS transmission uplink ACK/NACK signal, utilize resource to confirm that cell S 81 can confirm the frequency resource that is used to send uplink ACK/NACK signal at UpPTS;
When utilizing DwPTS to transmit descending ack/nack signal, utilize resource to confirm that cell S 81 can confirm the frequency resource that is used to send descending ack/nack signal at DwPTS.
Resource is confirmed the frequency resource no matter cell S 81 confirms to send uplink ACK/NACK signal, the frequency resource of still confirming to send descending ack/nack signal, and its mode all has a variety of.
A kind of mode can be: the pre-configured residual frequency resource that is used to transmit uplink ACK/NACK or descending ack/nack signal, adopt the residual frequency resource of said configuration to be used to transmit the upstream or downstream ack/nack signal regularly and get final product.Adopt the benefit of this mode to be, realize simply the processing complexity when having reduced actual motion.
Another kind of mode is: pre-configured frequency resource selection strategy, dynamically select to be used to transmit the residual frequency resource of uplink ACK/NACK or descending ack/nack signal according to said frequency resource selection strategy.Adopt the benefit of this mode to be, when actual motion, can select to be used to transmit the residual frequency resource of descending ack/nack signal more neatly according to the operating position of frequency resource.
After resource confirms that cell S 81 is confirmed in pilot time slot, to be used to send the frequency resource of ack/nack signal, notification unit S82 will comprise the UE in the configuration information of resource notifying cell that is used for transferring ACK/NACK signal.
Resource described here had both comprised time interval resource, i.e. pilot time slot comprises that also resource confirms cell S 81 determined frequency resources.
Notification unit S82 can give all UE in the sub-district with said configuration information broadcast announcement through system message, for example through D-BCCH configuration information is broadcast to all UE in the sub-district, also can notify each UE respectively with said configuration information through the scheduling controlling channel.
When utilizing UpPTS transmission uplink ACK/NACK signal, transmission unit S83 will receive uplink ACK/NACK signal that UE sends on the frequency resource of confirming described in the UpPTS;
When utilizing DwPTS to transmit descending ack/nack signal, transmission unit S83 will send descending ack/nack signal and give UE on the frequency resource of confirming described in the DwPTS.
Need to prove; Said configuration information not only includes only time interval resource and the frequency resource information that is used to transmit uplink ACK/NACK signal, also should comprise mode, the transmission sign indicating number sequence that uplink ACK/the NACK signal is adopted and the corresponding relation of uplink ACK/NACK signal and descending scheduling control channel of transmission uplink ACK/NACK signal.
Wherein, the mode of transmission uplink ACK/NACK signal comprises coherent manner and incoherent mode.When adopting coherent manner transmission uplink ACK/NACK signal, frequency pilot sign and ack/nack signal both can time division multiplexinges, also can frequency division multiplexing.
Because ack/nack signal only need transmit 1bit or 2bits information, therefore can adopt the mode of yard sequence to transmit, like ZC sequence commonly used, the different UEs in the same sub-district can be distinguished through the different phase shifts of ZC sequence.
When adopting incoherent mode to transmit uplink ACK/NACK signal, also can adopt similar with random access leader sequence signal structure.
According to said disclosed embodiment, can be so that those skilled in the art can realize or use the present invention.To those skilled in the art, the various modifications of these embodiment are conspicuous, and the general principles of definition here also can be applied to other embodiment on the basis that does not depart from the scope of the present invention with purport.Above-described embodiment is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the method for transferring ACK/NACK signal is characterized in that, comprising:
Confirm in uplink pilot time slot, to be used to transmit the frequency resource of uplink ACK/NACK signal, said frequency resource is the residual frequency resource except that the special frequency resource that sends ascending pilot frequency physical channel UpPCH among the uplink pilot time slot UpPTS;
To comprise the interior user equipment (UE) of configuration information of resource notifying cell that is used to transmit uplink ACK/NACK signal;
On the frequency resource of confirming described in the uplink pilot time slot, receive uplink ACK/NACK signal.
2. the method for claim 1 is characterized in that, confirms in uplink pilot time slot, to transmit the frequency resource of uplink ACK/NACK signal by pre-configured frequency resource.
3. the method for claim 1 is characterized in that, by pre-configured frequency resource selection strategy, confirms in uplink pilot time slot, to transmit the frequency resource of uplink ACK/NACK signal.
4. the method for claim 1 is characterized in that, the mode of transmission uplink ACK/NACK signal is a coherent manner, or incoherent mode.
5. method as claimed in claim 4 is characterized in that, when adopting coherent manner transmission uplink ACK/NACK signal, and frequency pilot sign and uplink ACK/NACK signal time division multiplexing, or frequency division multiplexing.
6. the device of transferring ACK/NACK signal is characterized in that, comprising:
Resource is confirmed the unit; Be used for confirming the frequency resource that is used to send uplink ACK/NACK signal at uplink pilot time slot, said frequency resource is the residual frequency resource except that the special frequency resource that sends ascending pilot frequency physical channel UpPCH among the uplink pilot time slot UpPTS;
Notification unit is used for the interior user equipment (UE) of configuration information of resource notifying cell that is used to transmit uplink ACK/NACK signal with comprising;
Transmission unit is used on the frequency resource of confirming described in the uplink pilot time slot, receiving uplink ACK/NACK signal.
7. device as claimed in claim 6 is characterized in that, resource confirms that the unit confirms in uplink pilot time slot, to transmit the frequency resource of uplink ACK/NACK signal by pre-configured frequency resource.
8. device as claimed in claim 6 is characterized in that, resource confirms that the unit by pre-configured frequency resource selection strategy, confirms in uplink pilot time slot, to transmit the frequency resource of uplink ACK/NACK signal.
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| CN 200710121649 CN101389120B (en) | 2007-09-11 | 2007-09-11 | Method and device for transmitting ACK/NACK signal |
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| CN 200710121649 CN101389120B (en) | 2007-09-11 | 2007-09-11 | Method and device for transmitting ACK/NACK signal |
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| CN2012102153229A Division CN102710397A (en) | 2007-09-11 | 2007-09-11 | Method and device for transmitting ACK (acknowledgement character)/NACK (negative acknowledgement character) signal |
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| CN101888636B (en) | 2009-05-14 | 2013-10-02 | 电信科学技术研究院 | Configuration and detection method of downlink measurement pilot frequency, and device |
| CN101800572B (en) * | 2010-01-04 | 2013-06-26 | 新邮通信设备有限公司 | Method and system for transmitting uplink reference signal and user equipment |
| CN109600850B (en) * | 2012-09-25 | 2023-04-07 | 日本电气株式会社 | Method and apparatus for enhancing coverage |
| US9936519B2 (en) | 2015-03-15 | 2018-04-03 | Qualcomm Incorporated | Self-contained time division duplex (TDD) subframe structure for wireless communications |
| US10075970B2 (en) | 2015-03-15 | 2018-09-11 | Qualcomm Incorporated | Mission critical data support in self-contained time division duplex (TDD) subframe structure |
| US9814058B2 (en) | 2015-05-15 | 2017-11-07 | Qualcomm Incorporated | Scaled symbols for a self-contained time division duplex (TDD) subframe structure |
| US9992790B2 (en) | 2015-07-20 | 2018-06-05 | Qualcomm Incorporated | Time division duplex (TDD) subframe structure supporting single and multiple interlace modes |
| CN108282881B (en) * | 2017-01-06 | 2020-12-15 | 华为技术有限公司 | Resource allocation method and device |
| CN111132086A (en) * | 2018-10-31 | 2020-05-08 | 电信科学技术研究院有限公司 | Information processing method and terminal |
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