CN101414849B - Method and apparatus for implementing ascending frequency-hopping transmission in TDD system - Google Patents
Method and apparatus for implementing ascending frequency-hopping transmission in TDD system Download PDFInfo
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Abstract
The invention discloses a method for implementing uplink frequency-hopping transmission in a TDD (Time Division Duplex) system. The method includes: a network side is provided with a composing structure of Transmission Time Interval (TTI) so as to contain one or more than one subframe; the network side sets the frequency-hopping mode adopting the TTI for uplink transmission; the network side informs a terminal side about the composing structure of the TTI and the frequency-hopping mode, and the terminal side carries out frequency-hopping transmission of uplink data according to the composing structure of the TTI and the frequency-hopping mode. The embodiment of the invention sets the composing structure of the TTI to contain one or more than one subframe by the network side and sets the frequency-hopping mode adopting the TTI for uplink transmission; the network side informs the terminal side about the composing structure of the TTI and the frequency-hopping mode. The terminal side carries out uplink data transmission according to the composing structure of the TTI and the frequency-hopping mode, thereby implementing flexible uplink frequency-hopping transmission mode, reducing mutual interference when the terminal carries out uplink communication in the system, and improving the system communication quality.
Description
Technical field
The present invention relates to the 3G (Third Generation) Moblie technology, (TimeDivision Duplex TDD) realizes method and the device that ascending frequency-hopping transmits in the system to be specifically related to a kind of time division duplex.
Background technology
At present, the 3-G (Generation Three mobile communication system) technology is increasingly mature, and this technology adopts code division multiple access (CodeDivision Multiple Access; CDMA) technology; Support higher communication bandwidth, thereby can realize multimedia communication service, compare the present communication technology; Have stronger technical advantage, so application prospect is very wide.In order to make the 3G (Third Generation) Moblie technology can continue to carry out technology innovation; Guarantee in the longer time, to have suitable competitiveness; Thereby prolong the commercial application cycle of 3G (Third Generation) Moblie technology; 3GPP is studying a kind of brand-new evolution network framework to satisfy following 10 years or mobile network's application demand in the longer time, comprise wireless interface technology Long Term Evolution (Long Term Evolution, LTE); The target of network being carried out evolution provides the network of a kind of low time delay, high data rate, high power system capacity and high coverage rate, and can reduce the cost of operator.
Wherein, TD-SCDMA is the standard of unique employing time division duplex in the three big international standards of 3-G (Generation Three mobile communication system), and TD-SCDMA supports the transmission of up-downgoing non-symmetrical service, on spectrum utilization, has bigger flexibility.TD-SCDMA system synthesis has adopted the advanced technology in the radio communications such as smart antenna, uplink synchronous, joint-detection and software radio, makes this system have the higher performance and the availability of frequency spectrum.In order to keep the long-term competitiveness of TD-SCDMA system, need carry out continuous evolution equally to improve performance.
According to current progress, the LTE system supports two kinds of wireless frame structures:
A, first kind radio frames (hereinafter referred Type1), be applicable to frequency division duplex system (FrequencyDivision Duplex, FDD) with the TDD system, its structure is as shown in Figure 1, wherein:
The frame length of Type1 is 10 milliseconds, is made up of 20 time slots (slot), and every slot length is 0.5 millisecond, is labeled as #0～#19 among Fig. 1.Per two continuous slot are defined as a sub-frame, have 10 sub-frame, that is: subframe i is made up of slot2i and 2i+1, wherein i=0,1,2......9.
When Type1 was applied to the FDD system, because the up-downgoing of frequency division duplex system separates on frequency domain, therefore in per 10 milliseconds of times, the provisional capital had 10 sub-frame to use up and down.
When Type1 was applied to the TDD system, in per 10 milliseconds of times, up-downgoing had 10 sub-frame and can use, and each subframe is respectively applied for upstream or downstream, and wherein, subframe 0 always is assigned as downlink transfer with subframe 5, comprises 14 SC-FDMA symbols in each subframe.
B, second type of radio frames (hereinafter referred Type2) are only applicable to the TDD system, and its structure is as shown in Figure 2, wherein:
The frame length of Type2 is 10 milliseconds, and every frame is divided into 25 milliseconds field.(be labeled as #0～#6) among Fig. 2 forms with 3 special time slots each field by 7 business time-slots.As shown in Figure 2, said 3 particular service time slots are respectively: descending pilot frequency, protection interval and ascending pilot frequency.
Each business time-slot is defined as a sub-frame, and wherein subframe # 0 and descending pilot frequency always are used for downlink transfer, and subframe # 1 and ascending pilot frequency always are used for uplink, comprise 9 SC-FDMA symbols in each subframe.
In the Long Term Evolution scheme (LTE TDD) of TD-SCDMA system, the support to above two kinds of frame structures is provided, wherein first-selected frame structure is the Type2 structure with the TD-SCDMA system compatible.
As everyone knows, mobile communication is to utilize the base station that the network coverage is provided, thereby the portable terminal that is embodied as in each sub-district in its coverage provides mobile communication to serve.Therefore, how guaranteeing that the different terminal equipment in each sub-district is carrying out non-interference in the process of up-downgoing exchanges data with the base station, is the key that guarantees communication quality and data transmission efficiency.
At current moving communicating field; Frequency hopping is a kind of technological means that addresses this problem that extensively adopts; Frequency hopping utilizes the carriers carry and the transmission information of the interior different frequency of frequency range of communication channel permission: carrier frequency band that uses during the expression transmission and the rule of the duration of on each frequency band, transmitting are called the frequency hopping mode; The carrier wave that the frequency hopping mode is set certain frequency band carries out transfer of data; Through another frequency band that saltus step to frequency hopping mode after the duration of setting is set, on next frequency band, proceed transfer of data, this process is the frequency hopping transmission course.When the duration is the duration of a symbol in the subframe, be called frequency hopping based on symbol, similarly, when the duration is the duration of a slot, be called frequency hopping based on slot, when the duration is the duration of a TTI, then be called frequency hopping based on TTI.Utilize frequency hopping; Can make in the communication process in the certain hour section; The communication frequency of terminal equipment is realized evenly distributing in communication channel tolerance frequency scope; With the phase mutual interference of intercarrier frequently, can prevent the monitoring of third party's malice again when both having avoided different terminal equipment to adopt same frequency to carry out transfer of data, and therefore can improve communication quality effectively, optimize data transmission efficiency and ensure communication safety.
By above-mentioned visible; At moving communicating field; Generally the length according to the carrier wave duration is divided into three kinds with the frequency hopping mode: based on the frequency hopping of character, based on the frequency hopping of slot with based on the frequency hopping of TTI; They do not have essential distinction technically, and it is the shortest to hold time on the frequency hopping identical frequency band based on character, and the longest based on holding time on the frequency hopping identical frequency band of TTI.Therefore, the frequency hopping mode that other parts of this paper occur except that special instruction is arranged, all is above-described three kinds of frequency hopping modes.
In the prior art, (TransmissionTime Interval TTI) equals 1 millisecond of the length of a sub-frame to the Transmission Time Interval of Type1 in the LTE TDD system, comprises two slot.Can adopt the hopping structure based on slot when utilizing Type1 to carry out uplink, realize that same user takies different time and carries out transfer of data in different slot, a kind of subframe structure sketch map during its frequency hopping transmission is as shown in Figure 3:
Wherein, user 1 takies time f1～f2 and carries out uplink in slot0, in slot1, then takies time f3～f4 and carries out uplink.
In addition, utilize Type1 to carry out the frequency hopping transmission and the time can also adopt other frequency hopping modes, for example based on the frequency hopping of character, or based on the frequency hopping of TTI.
Said frequency hopping based on symbol, perhaps similar based on frequency hopping and the frequency hopping based on slot described in Fig. 3 of TTI is so repeat no more.
But, comprising two slot under the Type1 structure in the middle of every TTI, the implementation of frequency hopping is comparatively single, and flexibility is not enough, can't adapt to the network requirement that evolvement network further develops the low time delay, high data rate, high power system capacity and the high coverage rate that are proposed.
For the Type2 in the LTE TDD system; TTI length is 0.675 millisecond, comprises a slot, therefore under the structure of Type2, can't carry out the frequency hopping transmission based on slot; Because system does not make concrete regulation to the frequency band occupation mode in when transmission; Therefore when a plurality of slot of same CU carried out transmitting uplink data, transmission means was in stochastic regime, that is: the shared a plurality of slot of this user adopt same frequency band to carry out transfer of data; Also possibly be to adopt different frequency bands to transmit, the communication quality of system can't be effectively guaranteed.
At present, a kind of frequency hopping transmission method based on TTI inside is arranged, be used for when using control channel (PUCCH) transmission, carrying out the ascending frequency-hopping transmission.This method is a slot separated into two parts, and it is as shown in Figure 4 that this moment, subframe was carried out the structural representation of frequency hopping transmission: upstream data takies different frequency bands respectively in former and later two time periods, keep single-carrier property to transmit.Described single-carrier property is meant: the certain sequential frequency band of CU carries out transfer of data and keeps certain hour length, keeps single-carrier property can guarantee stable peak-to-average force ratio, to obtain reliable and stable the effect of information transmission.
But; This frequency hopping transmission means need be divided into two parts with 1 slot, and is according to preamble, comprises 9 OFMD symbols among each slot; Therefore no matter be partitioning scheme or other modes that adopts 5/4 two-part commonly used; Cut apart the two parts that obtain and all have asymmetry, in this frame structure, realize the frequency hopping transmission, network side need be provided with special-purpose rule for it; End side also need be provided with to support this uplink mode simultaneously, and therefore this frequency hopping transmission means implements cumbersome.
Simultaneously, the use of this frequency hopping mode also has significant limitation, only can be applied to the ascending frequency-hopping transmission of control channel, and can't be applied to the transmission of Uplink Shared Channel (PUSCH).
Reason is; Taking this frequency hopping transmission manner is the high reliability in order to guarantee that indication information transmits; Therefore be used for indication information such as data confirmation of receipt (ACK), the channel quality indication (CQI) etc. of control channel transmission outbalance; The transmission of these indication informations occur over just that the sub-district is inserted at the terminal for the first time or situation such as reset under, this uplink does not need often to carry out.Shared channel then is used for the transmission of regular business datum, such as the speech call information at terminal or multimedia data information etc.In this case; Each slot cut apart and corresponding rule is set realize frequency hopping transmission to control it; Can increase the complexity of system design undoubtedly greatly; The stability of communication quality and reliability also can't be effectively guaranteed, so the transmission of shared channel can't adopt above-mentioned frequency hopping mode to carry out.
Visible by the above; Under LTE TDD system; Its first-selected frame structure (being Type2) can't be realized the frequency hopping transmission of similar Type1 under prior art; Existing frequency hopping transmission means application scenarios limitation is bigger, and implementation is loaded down with trivial details, and interference ratio mutual when uplink communication is carried out at the terminal in the system is more serious.In addition, the frequency hopping mode in the prior art under the Type1 structure is comparatively single, and flexibility is not enough.
Summary of the invention
The embodiment of the invention provides method and the device of realizing the ascending frequency-hopping transmission in a kind of tdd systems, can realize ascending frequency-hopping transmission flexibly.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
Realize the method for ascending frequency-hopping transmission in a kind of TDD system, it is characterized in that this method comprises:
Network side is provided with the composition structure of Transmission Time Interval TTI, and TTI is set to comprise the subframe of 1 or 1 above number;
Network side is provided with the frequency hopping mode when using said TTI to carry out uplink;
Network side is notified end side with composition structure and the frequency hopping mode of said TTI, the frequency hopping transmission that end side is carried out up direction according to composition structure and the frequency hopping mode of said TTI.
Network side is realized the device of ascending frequency-hopping transmission in a kind of TDD system, and this device comprises: TTI configuration module, frequency hopping are provided with module and up receiver module;
The TTI configuration module is used to be provided with the TTI configuration rule, makes said TTI comprise the subframe more than 1 or 1, and this rule is sent to frequency hopping module and uplink information receiver module are set;
Frequency hopping is provided with module, is used to receive the TTI configuration rule that the TTI configuration module provides, and sets the frequency hopping mode according to said TTI configuration rule, and the frequency hopping mode of setting is sent to the uplink information receiver module; Also be used for the frequency hopping mode of said TTI configuration rule and setting is sent to end side;
The uplink information receiver module is used for the uplink information that the receiving terminal side is sent, and the frequency hopping mode that the TTI configuration rule that provides according to the TTI configuration module and frequency hopping are provided with the module transmission is carried out demodulation to the received signal and obtained uplink information.
End side realizes the device of ascending frequency-hopping transmission in a kind of TDD system, and this device comprises: information receiving module and uplink information sending module are set;
Information receiving module is set, is used to receive TTI configuration rule and the frequency hopping mode that network side sends, and is transmitted to the uplink information sending module;
Said uplink information sending module is used for according to TTI configuration rule and the frequency hopping mode that information receiving module sends is set uplink information being sent to network side.
Visible by above-mentioned technical scheme, the composition structure that the embodiment of the invention is provided with TTI through network side is to comprise the subframe of 1 or 1 above number and the frequency hopping mode when using said TTI to carry out uplink is set; Network side is notified end side with composition structure and the frequency hopping mode of said TTI; End side is carried out uplink according to composition structure and the frequency hopping mode of said TTI; Realized ascending frequency-hopping transmission means flexibly; Reduce interference mutual when uplink communication is carried out at the terminal in the system, improved system communication quality.
Description of drawings
Fig. 1 is the first kind frame structure sketch map that the LTE system is suitable in the prior art.
Fig. 2 is second type of frame structure sketch map that the LTE system is suitable in the prior art.
Structural representation when the first kind frame structure that Fig. 3 is suitable for for LTE system in the prior art carries out the ascending frequency-hopping transmission.
TTI hopping structure sketch map when second type of frame structure that Fig. 4 is suitable for for LTE system in the prior art carries out the ascending frequency-hopping transmission through control channel.
Fig. 5 is a schematic flow sheet of realizing the method for ascending frequency-hopping transmission in the embodiment of the invention in the LTE TDD system.
Fig. 6 forms structural representation for the TTI that TTI in the LTE TDD system in the embodiment of the invention is provided with after expanding.
TTI hopping structure sketch map when Fig. 7 carries out the ascending frequency-hopping transmission for TTI in the LTE TDD system in the embodiment of the invention is provided with the expansion back through control channel.
TTI hopping structure sketch map when Fig. 8 carries out the ascending frequency-hopping transmission for TTI in the LTE TDD system in the embodiment of the invention is provided with the expansion back through shared channel.
Fig. 9 is that the device that network side realization ascending frequency-hopping transmits in the LTE TDD system in the embodiment of the invention is formed structural representation.
Figure 10 is that the device that end side realization ascending frequency-hopping transmits in the LTE TDD system in the embodiment of the invention is formed structural representation.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to further explain of the present invention.
The embodiment of the invention provides the method that realizes the ascending frequency-hopping transmission in a kind of LTE TDD system, and the method flow of this embodiment is as shown in Figure 5:
Step 501: network side is provided with the composition structure of Transmission Time Interval TTI, makes it to comprise 1 or more subframes.
Step 502: network side is provided with the frequency hopping mode when using said TTI to carry out uplink.
Step 503: composition structure and the frequency hopping mode of the said TTI that network side will be provided with are notified the terminal.
Step 504: end side adopts composition structure and the frequency hopping mode of described TTI, sends upstream data and gives network side.
Need to prove that end side is carried out ascending frequency-hopping when transmission, the frequency hopping mode of setting according to network side (that is: carrier frequency band that uses during uplink and the duration of carrying out uplink at each carrier frequency band) is carried out transmitting uplink data.Concrete frequency hopping mode is set according to concrete type of service and channel operating position by network side; Such as taking information settings such as situation according to the amount of capacity of number of users, upstream data service in the current area and other users' frequency band; Operator can be provided with according to actual conditions, and the present invention does not limit.
Following mask body is introduced above-mentioned each step:
The setting of the existing TTI of expansion makes that the TTI after the expansion can be N times (N=2...6) of original subframe lengths.Simultaneously, this TTI both can be based on the frame structure of Type1, also can be based on the frame structure of Type2.In the practical application, for Type1, the TTI after the expansion can be the even-multiple of former subframe lengths; And for Type2, the TTI after the expansion also can still be 1 sub-frame length, and the PUCCH of this moment still adopts the frequency hopping mode of prior art to realize the frequency hopping transmission, and PUSCH does not then carry out frequency hopping, and the mode of uplink this moment is identical with prior art, so repeat no more.
For system based on Type2, when a TTI after the expansion comprises 2 or more slot, the inner frequency hopping transmission that realizes based on slot of a TTI that then can be after expansion.A kind of composition structure of TTI after the expansion is as shown in Figure 6, and comprise two sub-frame among a TTI this moment, in two sub-frame, can adopt different frequency bands to transmit, thereby realizes ascending frequency-hopping; Similarly, also can in a TTI, comprise 3 or more subframes, thereby between each slot, realize the frequency hopping transmission according to the actual needs of concrete business.And, when a TTI after the expansion comprises 2 or more slot, adopt the frequency hopping mode of prior art can realize frequency hopping transmission flexibly for Type1.In a word, the composition structure of the TTI after the expansion is a flexibility and changeability, can be according to the specific requirement flexible configuration of using.
After the setting of TTI expanded; TTI configuration after system will expand offers the user and supplies to use in the communication process; Set a default TTI and form structure, this default TTI is just predetermined at the beginning of system design, and promptly system disposes the composition structure of preserving TTI in base station (NodeB); When the sub-district was inserted at the terminal, NodeB was handed down to the terminal with the composition structure of this TTI through Cell Broadcast CB; When perhaps the sub-district is inserted at the terminal to the composition structure of this TTI of NodeB request, and by sending it to the terminal after the NodeB response.Afterwards, NodeB can for example can be to comprise 2 perhaps TTI of more subframes, and the default TTI of fixing always this length of use carry out transmission of uplink data to the definite TTI length of terminal distribution.
Preferably, can also be according to professional actual needs---the TTI of other structure is set like the difference of the requirement of time delay or moving velocity of terminal.Network side is set the business rule of TTI configuration in advance according to different business types, can use this rule that the composition structure of TTI is configured.For example, the default TTI of system's initial configuration comprises 2 slot, when needs carry out the Large Volume Data transmission, requires the ascending time slot large percentage, just needs longer TTI configuration this moment, and system then reconfigures TTI and makes it to comprise 4 or more slot.
Need to prove that above-mentioned composition structure with TTI issues in the process at terminal, also need notify the frequency hopping mode the when terminal is follow-up carries out transmitting uplink data.
After TTI after above-mentioned expansion is brought into use at base station and terminal is provided with and communicates; Said LTETDD system just can use the frequency hopping transmission manner in up link; The terminal is according to TTI length and the frequency hopping mode set; Upstream data is sent to the base station according to the carrier wave of the TTI length of setting through the specified frequency band of frequency hopping mode, and demodulation is carried out, the upstream data that obtains comprising to the carrier wave that receives respectively in the base station on assigned frequency band.
By above-mentioned visible, the embodiment of the invention is through being provided with default TTI, and in uplink process subsequently flexible configuration, improved the flexibility of uplink mode and to the adaptability of the requirement of different service types.
For the frame structure based on Type2, said terminal specifically comprises upstream data to the method for base station transmission according to the carrier wave of the TTI length of setting through the specified frequency band of frequency hopping mode according to TTI length and the frequency hopping mode set:
1), only in PUCCH, carries out the frequency hopping transmission for the TTI that comprises 1 slot.
2) for the TTI that comprises 2 and above slot, PUCCH can realize the ascending frequency-hopping transmission, the hopping structure sketch map of PUCCH when Fig. 7 shows TTI and comprises 2 slot.Same user takies different time and carries out transfer of data in two slot, keep the single carrier transmission characteristic simultaneously.Because the embodiment of the invention is expanded the setting of TTI; Therefore can carry out frequency hopping transmission very easily through the TTI after the expansion based on slot; But in the practical application and not only be confined to this kind mode, the composition structure of the TTI after the expansion can be supported in the prior art based on symbol or based on the ascending frequency-hopping transmission of TTI equally.
3) for the TTI that comprises 2 and above slot; PUSCH can realize the ascending frequency-hopping transmission; Same user takies different time and carries out transfer of data in different slot; Keep the single carrier transmission characteristic simultaneously,, can also adopt in the practical application based on the frequency hopping mode of symbol or based on the frequency hopping mode of TTI and carry out the ascending frequency-hopping transmission except hopping structure based on slot.
Need to prove; The length of the sub-frame of Type2 is 0.675 millisecond in the existing LTE TDD system; Comprise 9 OFDM symbols in each subframe; Frequency hopping mode based on symbol is meant: each OFDM symbol all transmits through the carrier wave of different frequency bands, thereby 9 symbols need the carrier wave of 9 kinds of frequency bands to transmit.And, comprise 14 OFDM symbols in the sub-frame for Type1, and said frequency hopping mode based on symbol is: each OFDM symbol all transmits through the carrier wave of different frequency bands, thus 14 symbols need the carrier wave of 14 kinds of frequency bands to transmit.
Described frequency hopping mode based on slot is meant: with slot unit, and the carrier wave of a kind of frequency band of The data among each slot, the data among the different slot are transmitted through the carrier wave of different frequency bands.
Described frequency hopping mode based on TTI is meant: be unit with TTI; The carrier wave of a certain frequency band of The data among each TTI, the data in the different TTI are transmitted through the carrier wave of different frequency bands, and this mode system complexity is minimum; But correspondingly the even distributivity of frequency is the poorest; Especially when TTI is longer, adopt the carrier transmission mass data of same frequency, communication frequency easy and other terminal produces and interferes with each other.
For the system that is provided with based on Type2 expansion TTI, described frequency hopping mode, based on the frequency hopping mode of slot or based on the frequency hopping mode of TTI based on symbol, similar with corresponding each frequency hopping mode of Type1 in the prior art, so locate to repeat no more.
When PUSCH uplink speech call information or multimedia data information are passed through in the terminal; Suppose that network side was set at a TTI and comprised 2 slot this moment; Frequency-hopping method is: use first frequency band of the interval the latter half of communication band to transmit in the previous slot time period, use first frequency band of the interval the first half of communication band to transmit in the back slot time period.
Network side is with the configuration mode of TTI and the frequency-hopping method notice terminal of setting.The terminal is carried out uplink with said speech call information or multimedia data information according to described TTI configuration mode and frequency-hopping method, and is as shown in Figure 8.In a TTI of uplink, previous slot terminal uses first frequency band of the interval the latter half of communication band to transmit, and a back slot terminal uses first frequency band of the interval the first half of communication band to transmit.
Understand easily; The above embodiment only is based on the example that slot carries out the frequency hopping transmission; The slot number that wherein TTI is set and is comprised, and the shared frequency band of each slot when setting frequency-hopping method can be in concrete application realize other collocation form through system.
In addition, except frequency hopping mode, can also adopt based on the frequency hopping of symbol or based on the frequency hopping of TTI, its concrete implementation is with similar based on the frequency hopping mode of slot, so repeat no more based on slot.In practical application, can select suitable frequency hopping transmission means according to the requirement of concrete business.
The embodiment of the invention provides network side in a kind of LTE TDD system to realize the device of ascending frequency-hopping transmission, and it is as shown in Figure 9 that this device is formed structure, comprising:
Said TTI configuration module 901 is used to be provided with the TTI configuration rule, makes said TTI comprise the subframe of 1 or more a plurality of numbers, and should rule to frequency hopping module 902 and uplink information receiver module 903 be set.
Said frequency hopping is provided with module 902, is used to receive the TTI configuration rule that TTI configuration module 901 provides, and sets the frequency hopping mode according to concrete type of service and channel operating position etc., and this frequency hopping mode is offered up receiver module 903.
Said up receiver module 903 is used for the uplink information that the receiving terminal side is sent, and the frequency hopping mode that TTI configuration rule that provides according to TTI configuration module 901 and frequency hopping are provided with module 902 to be provided is carried out demodulation to the received signal and obtained uplink information.
Preferably, also further comprise default TTI configuration module 904 and professional TTI configuration module 905 in the TTI configuration module 901.
Said default TTI configuration module 904; Being used to be provided with TTI composition structure is that default TTI forms structure; And said TTI being formed structure sends to professional TTI configuration module 905, frequency hopping is provided with module 902 and uplink information receiver module 903, said default TTI forms structure and comprises the subframe of fixed number and in follow-up uplink process, remain unchanged.
Said professional TTI configuration module 905; Be used to receive the default TTI composition structure that default TTI configuration module 904 sends; Dispose TTI according to the predefined business rule of network side and form structure; And said TTI is formed structure send to frequency hopping module 902 and uplink information receiver module 903 are set, said TTI comprises the subframe of different numbers according to the difference of business rule.
The embodiment of the invention also provides end side in a kind of LTE TDD system to realize the device of ascending frequency-hopping transmission, and it is shown in figure 10 that this device is formed structure, comprising:
Said upstream data sending module 1002 is used for according to TTI configuration rule and frequency hopping mode that information receiving module transmission 1001 is set uplink information being sent to network side.
Visible by the foregoing description; The method and apparatus of this realization ascending frequency-hopping transmission of the present invention; Expanded the TTI setting, and when carrying out the uplink information transmission, adopted the frequency hopping transmission manner, the band efficiency when having improved the uplink information transmission in the sub-district; Avoid the phase mutual interference of each terminal room, improved the communication efficiency of network.
Should be appreciated that the above is merely preferred embodiment of the present invention, is not to be used to limit spirit of the present invention and protection range, and equivalent variations that any those of ordinary skill in the art made or replacement all should be regarded as being encompassed within protection scope of the present invention.
Claims (12)
1. realize the method that ascending frequency-hopping transmits in a TDD system, it is characterized in that this method comprises:
Network side is provided with the composition structure of Transmission Time Interval TTI; TTI is set to comprise the subframe of 1 or 1 above number: the composition structure that TTI is set is that default TTI forms structure, and said default TTI forms and comprises the subframe of fixed number in the structure and in follow-up uplink process, remain unchanged; Or disposing the composition structure of TTI according to business rule, said TTI comprises the subframe of different numbers according to the difference of said business rule;
Network side is provided with the frequency hopping mode when using said TTI to carry out uplink;
Network side is notified end side with composition structure and the frequency hopping mode of said TTI, the frequency hopping transmission that end side is carried out up direction according to composition structure and the frequency hopping mode of said TTI.
2. method according to claim 1 is characterized in that, when said TTI comprises a sub-frame, only carries out the ascending frequency-hopping transmission at ascending control channel PUCCH.
3. method according to claim 1 is characterized in that, when said TTI comprised more than one subframe, PUCCH carried out the ascending frequency-hopping transmission, and Uplink Shared Channel PUSCH also carries out the ascending frequency-hopping transmission simultaneously.
4. method according to claim 1 is characterized in that, the method that network side is notified end side with composition structure and the frequency hopping mode of said TTI is:
Network side sends to end side through Cell Broadcast CB with composition structure and the frequency hopping mode of said TTI, or by end side to the network side initiation request, network side this request of response and the composition structure and the frequency hopping mode of sending said TTI to end side.
5. method according to claim 1 is characterized in that, the method that end side is carried out the frequency hopping transmission of up direction according to said frequency hopping mode is the frequency hopping based on slot s lot.
6. method according to claim 5 is characterized in that, the method for said frequency hopping based on slot is:
When comprising a plurality of slot among the TTI, the information in the middle of each slot among the TTI to be sent through different carrier frequency bands respectively, the duration of each carrier frequency band is the duration of a slot.
7. method according to claim 1 is characterized in that, the method that end side is carried out the frequency hopping transmission of up direction according to said frequency hopping mode is: based on the frequency hopping of symbol or based on the frequency hopping of TTI.
8. method according to claim 7 is characterized in that, the method for said frequency hopping based on symbol is:
Information in the sign bit that each subframe comprised is sent through different carrier frequency bands respectively, and the duration of each carrier frequency band is the duration of a character.
9. method according to claim 7 is characterized in that, the method for said frequency hopping based on TTI is:
Information among each TTI is sent through different carrier frequency bands respectively, and the duration of each carrier frequency band is the duration of a TTI.
10. network side is realized the device of ascending frequency-hopping transmission in the TDD system, and it is characterized in that this device comprises: Transmission Time Interval TTI configuration module, frequency hopping are provided with module and uplink information receiver module;
The TTI configuration module; Be used to be provided with the TTI configuration rule; Make said TTI comprise the subframe more than 1 or 1; And this rule is sent to frequency hopping module and uplink information receiver module are set, said TTI configuration rule comprises: default TTI forms structure, and said default TTI forms and comprises the subframe of fixed number in the structure and in follow-up uplink process, remain unchanged; Or the composition structure of the TTI that disposes according to business rule, said TTI comprises the subframe of different numbers according to the difference of said business rule;
Frequency hopping is provided with module, is used to receive the TTI configuration rule that the TTI configuration module provides, and sets the frequency hopping mode according to said TTI configuration rule, and the frequency hopping mode of setting is sent to the uplink information receiver module; Also be used for the frequency hopping mode of said TTI configuration rule and setting is sent to end side;
The uplink information receiver module is used for the uplink information that the receiving terminal side is sent, and the frequency hopping mode that the TTI configuration rule that provides according to the TTI configuration module and frequency hopping are provided with the module transmission is carried out demodulation to the received signal and obtained uplink information.
11. device according to claim 10 is characterized in that, comprises in the said TTI configuration module: default TTI configuration module and professional TTI configuration module;
Said default TTI configuration module; Being used to be provided with TTI composition structure is that default TTI forms structure; And said TTI being formed structure sends to professional TTI configuration module, frequency hopping is provided with module and uplink information receiver module, said default TTI forms structure and comprises the subframe of fixed number and in follow-up uplink process, remain unchanged;
Said professional TTI configuration module; Be used to receive the default TTI composition structure that default TTI configuration module sends; Dispose TTI according to the predefined business rule of network side and form structure; And said TTI is formed structure send to frequency hopping module and uplink information receiver module are set, said TTI comprises the subframe of different numbers according to the difference of business rule.
12. end side realizes the device that ascending frequency-hopping transmits in the TDD system, it is characterized in that this device comprises: information receiving module and uplink information sending module are set;
Information receiving module is set; Be used to receive the Transmission Time Interval TTI configuration rule of network side transmission and the frequency hopping mode of setting according to said TTI configuration rule; And be transmitted to the uplink information sending module; Said TTI configuration rule comprises: default TTI forms structure, and said default TTI forms and comprises the subframe of fixed number in the structure and in follow-up uplink process, remain unchanged; Or the composition structure of the TTI that disposes according to business rule, said TTI comprises the subframe of different numbers according to the difference of said business rule;
Said uplink information sending module is used for according to TTI configuration rule and the frequency hopping mode that information receiving module sends is set uplink information being sent to network side.
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| WO2017195849A1 (en) * | 2016-05-12 | 2017-11-16 | 株式会社Ｎｔｔドコモ | User terminal and wireless communication method |
| WO2018028139A1 (en) * | 2016-08-12 | 2018-02-15 | 中兴通讯股份有限公司 | Information sending method, sending apparatus and computer storage medium |
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