CN109792735A - User terminal and wireless communications method - Google Patents

Abstract

In the communication using beam forming, the control information of downlink and/or uplink is suitably transmitted and received.User terminal includes: receiving unit, and in control channel region in 1 subframe, can mapping multiple control channel candidates, it is candidate to receive control channel；And control unit, it is controlled such that the control channel candidate received based on the receiving unit is decoded control information, in the control channel region, to the different wave beam of different symbol associations, the control channel candidate is mapped at least 1 symbol among the different symbol, in the symbol that the control channel candidate is mapped, the information content that can be mapped is determined in advance.

Description

User terminal and wireless communications method

Technical field

The present invention relates to the user terminals and wireless communications method in next generation mobile communication system.

Background technique

At UMTS (Universal Mobile Communication System (Universal Mobile Telecommunications System)) In network, for the purpose of further high data rate, low latency etc., long term evolution (LTE:Long Term Evolution) become specification (non-patent literature 1).In addition, with from the further broadband of LTE (also referred to as LTE Rel.8 or 9) For the purpose of change and high speed, LTE-A (also referred to as LTE Advanced, LTE Rel.10,11 or 12) becomes specification, also just The follow-up system of LTE is being studied (for example, also referred to as FRA (the following wireless access (Future Radio Access)), 5G the (the 5th Generation Mobile Communication System (5th generation mobile communication system)), NR (new wireless (New Radio)), NX (new wireless access (New radio access)), FX (following wireless access (the Future generation Radio access)), after LTE Rel.13,14 or 15 etc.).

It is broadband in order to realize in LTE Rel.10/11, it introduces multiple carrier waves (component carrier (CC:Component Carrier), cell) merge carrier wave polymerize (CA:Carrier Aggregation).Each component carrier is by LTE Rel.8's System band domain is configured as a unit.In addition, multiple CC of same wireless base station (eNB:eNodeB) are set in CA Give user terminal (user apparatus (UE:User Equipment)).

In addition, also introducing multiple cell groups (CG:Cell Group) quilt of different wireless base stations in LTE Rel.12 It sets and gives the dual connection of user terminal (DC:Dual Connectivity).Each cell group is (CC, small by least one carrier wave Area) it constitutes.Since multiple carrier waves of different wireless base stations are merged, so DC is also referred to as CA (Inter-eNB between base station CA) etc..

In addition, in existing LTE system (for example, LTE Rel.8-13), using 1ms Transmission Time Interval (TTI: Transmission Time Interval) carry out downlink (DL:Downlink) and/or uplink (UL:Uplink) Communication.The TTI of the 1ms is the 1 data/grouping sending time unit carried out after channel coding, and it is adaptive to become scheduling, link It answers, retransmit control (mixed spin system-confirmation (HARQ-ACK:Hybrid Automatic Repeat )) etc. reQuest-Acknowledge processing unit.The TTI of 1ms is also referred to as subframe, subframe lengths etc..

Existing technical literature

Non-patent literature

Non-patent literature 1:3GPP TS 36.300Rel.8 " Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E- UTRAN)；Overall description；Stage 2"

Summary of the invention

Subject to be solved by the invention

In 5G, research uses such as 100GHz carrier frequency very high in this way, is also studying the wave in high frequency band The application of beam forming.But if it will not send downlink/uplink of the control information of downlink and/or uplink Road control signal structure is set as being suitable for the structure of beam forming, then is unable to get desired effect, such as diversity.

The present invention is completed in view of above-mentioned aspect, one of its goals is to, it provides in the communication using beam forming, The user terminal and wireless communications method of the control information of downlink and/or uplink can suitably be transmitted and received.

Solution for solving the problem

The user terminal of one mode characterized by comprising receiving unit, it is in 1 subframe, multiple controls can be mapped In the control channel region of channel candidate processed, it is candidate to receive control channel；And control unit, it is controlled such that based on described The control channel candidate that receiving unit receives is decoded control information, in the control channel region, to not With symbol association different wave beams, the control channel candidate be mapped at least 1 yard among the different symbol Member, in the symbol that the control channel candidate is mapped, the information content that can be mapped is determined in advance.

Invention effect

In accordance with the invention it is possible to suitably transmit and receive the control information of downlink and/or uplink.

Detailed description of the invention

Fig. 1 is the increased figure for illustrating the code element number using 1 caused subframe of high frequency band.

Fig. 2A be for illustrating to apply beam forming in the case where coverage area figure, Fig. 2 B is for illustrating not answer With the figure of the coverage area in the case where beam forming.

Fig. 3 is the figure for illustrating the mapping of the control channel candidate in embodiment 1.

Fig. 4 is the figure for indicating the mapping example of the control channel candidate in embodiment 1.

Fig. 5 is the figure for indicating the mapping example of the control channel candidate in embodiment 1.

Fig. 6 is the figure for illustrating the mapping of the control channel candidate in embodiment 2.

Fig. 7 is the figure for indicating the mapping example of the control channel candidate in embodiment 2.

Fig. 8 A and Fig. 8 B are the figures for illustrating the notification method in the control channel region in an embodiment.

Fig. 9 is the figure for illustrating the search space determining method in an embodiment.

Figure 10 A- Figure 10 D is for illustrating the search space determining method according to an embodiment and searching for being configured The figure of the concrete example in rope space.

Figure 11 is the figure for illustrating the search space determining method in an embodiment.

Figure 12 A- Figure 12 D is for illustrating the search space determining method according to an embodiment and searching for being configured The figure of the concrete example in rope space.

Figure 13 is the figure for indicating an example of the outline structure of wireless communication system of present embodiment.

Figure 14 is the figure for indicating integrally-built an example of wireless base station of present embodiment.

Figure 15 is the figure for indicating an example of the functional structure of wireless base station of present embodiment.

Figure 16 is the figure for indicating integrally-built an example of user terminal of present embodiment.

Figure 17 is the figure for indicating an example of the functional structure of user terminal of present embodiment.

Figure 18 is the figure for indicating an example of the hardware configuration of wireless base station and user terminal of present embodiment.

Specific embodiment

In existing LTE system, user terminal uses the TTI of the time span with 1ms, carries out DL's and/or UL Communication.Such TTI is also referred to as general T TI, TTI, subframe, long TTI, common subframe, long subframe, tradition (legacy) TTI Deng being made of 2 time slots.In addition, to each symbol additional cycles prefix (CP) in general T TI.Additional usual to each symbol In the case where CP (for example, 4.76 μ s), general T TI includes 14 symbols (7 symbols of every time slot) and is configured (referring to Fig.1). In addition, the TTI (for example, TTI for being less than 1ms) shorter than existing LTE system, which can also be referred to as, shortens TTI, short TTI etc..

On the other hand, in following wireless communication system (for example, LTE Rel.14 or 15,5G, NR etc.), it is desirable in list Communication (the equipment from inter-machine communications (M2M) such as eMBB, IoT or MTC of high speed and large capacity is accommodated in one framework A large amount of connections (extensive MTC (mMTC:massive MTC)) of (user terminal)), low latency and high reliable communication (URLLC: Ultra-reliable and low latency communication) etc. multiplicity service.In URLLC, it is desirable that ratio Effect is cut down in the higher delay of eMBB or mMTC.

The high frequency band it is easy to ensure that wide band is utilized on the basis of existing frequency band for this purpose, studying.For example, in benefit With high frequency band, in the case where expanding the subcarrier spacing in the multi-carrier transmissions such as OFDM, since Baud Length shortens, it is contemplated that Increase the code element number (referring to Fig.1) of every 1 subframe.Equally, SC transmit (DFT-spread OFDM transmission) in the case where, also because Using high frequency band and carry out it is broadband and Baud Length shortens, it is contemplated that increasing the code element number of every 1 subframe.

On the other hand, consider by high frequency band apply beam forming and extended coverage range.For example, such as Fig. 2A institute Show, do not apply beam forming in the case where, from sending point (wireless base station, user terminal etc.) send signal be defined to Certain coverage area centered on sending point.On the other hand, in the case where application beam forming, from the letter of sending point transmission Number amplitude and/or phase be controlled and become with directive property signal.Therefore, as shown in Figure 2 B, with do not apply wave beam The case where molding, is compared, and is capable of forming and is located at away from sending point compared with distant positions and the region that is defined, as coverage area.

But about applying how to transmit and receive downlink and/or uplink when beam forming in high frequency band Information this point is controlled still under study for action, it is desirable that by the control signal structure in transmitted downlink/uplink (for example, control channel is candidate) is set as being suitable for the structure of beam forming.

The inventors of the present invention pay close attention in increase and the high frequency band of the code element number of 1 subframe caused by due to the utilization of high frequency band Beam forming serviceability, it is contemplated that different wave beam is utilized in different symbols.

In addition, " utilizing wave beam (distribution wave beam, association wave beam, setting wave beam) " includes using Transmit weight or to receive power The case where signal being mapped in symbol is handled again.In addition it is also possible to comprising application beam forming, to transmitted Signal assign had been assigned in specific amplitude and/or phase or directive property or received signal specific amplitude and/ Or the case where phase or directive property.In addition, using precoding when transmitting and receiving signal.For example, the pre- of code book can be utilized Code weight.

Hereinafter, referring to attached drawing, the embodiment that the present invention will be described in detail.Here, it is contemplated that because the code element number of every 1 subframe increases The case where adding, multiple symbols capable of being utilized in control channel (the transmission resource of control information).Although in addition, when it is m- The candidate of multiple control channels is distributed in frequency resource, but considers candidate's (DCI (downlink control of distributed control channel Information (Downlink Control Information) processed) candidate) it has been mapped to the resource of search space.

(embodiment 1)

Referring to Fig. 3-Fig. 5, illustrate embodiment 1.In Fig. 3, in the 1 subframe amount for being sent to user terminal from wireless base station Radio resource in, it is candidate that multiple control channels are shown.Fig. 4 and Fig. 5 indicates that the control channel in control channel region is candidate Distribution concrete example.

As shown in figure 3, in 1 subframe provide 28 symbols (SB#0-SB#27), and further setting so that these 28 4 symbols (SB#0-SB#3) started among a symbol can utilize as control channel.For example, in the example in figure 3, It is the time domain/frequency domain that can be used as control channel using the region that thick line surrounds.In addition, the width in the longitudinal axis (frequency axis) direction It is also possible to the bandwidth of system bandwidth or 1 component carrier.In addition, the code element number being configured in 1 subframe is set in Fig. 3 It is 28, the code element number that can be used in control channel is set to 4, but not limited to this.

Here, in the symbol SB#0-SB#3 of control channel, it is set (distribution) wave beam BF#1-BF#3 respectively. About set wave beam, by beam forming, amplitude and/or phase are controlled, or have been assigned directive property.In addition, In the example shown in Fig. 3, it is respectively different that wave beam BF#1-BF#3 is shown, but not limited to this.It is set so that as control Among multiple symbols that channel processed uses, the wave beam being assigned at least two symbol is different.

Further, in the region that control channel can be used as to use, 4 control channel candidate #0-#3 are mapped.From It will be clear that each control channel candidate #0-#3 is assigned different frequency resources (for example, subcarrier) in Fig. 3, and It is mapped across 4 symbol SB#0-SB#3.

Either one or two of according to the structure of embodiment 1, wireless base station can select control channel candidate, and with selected The resource of control channel candidate sends control information.Here, when sending 1 control information, due to as control channel Among the multiple symbols used, the wave beam being assigned at least two symbol is set difference (in Fig. 3, due to whole Symbol sets different wave beams), so applying different beam formings between symbol, diversity (beam diversity can be obtained Gain).

Expect that following wireless communication system (for example, 5G, NR) realizes various radio communication services, is divided with meeting Not different requirement conditions (for example, ultrahigh speed, large capacity, ultralow delay etc.).

For example, research, which provides, is referred to as eMBB (enhanced mobile broadband (enhanced Mobile Broad in 5G Band)), IoT (Internet of Things (Internet of Things)), MTC (machine type communication (Machine Type Communication)), M2M (Machine To Machine (Machine To Machine)), URLLC (super reliable low latency communication (Ultra Reliable and Low Latency Communications)) etc. radio communication service.In addition, according into The equipment of row communication, M2M can also be referred to as that D2D (equipment is to equipment (Device To Device)), (vehicle is to vehicle by V2V (Vehicle To Vehicle)) etc..In order to meet the requirement of the communication for above-mentioned multiplicity, just in new logical of researching and designing Believe access way (New RAT (wireless access technology (Radio Access Technology))).

In 5G, is studying and carrying out service offer using such as 100GHz carrier frequency very high in this way.It is general and Speech becomes difficult to ensure coverage area if carrier frequency increases.As reason, the reason is that range attenuation becomes violent or electric The rectilinear propagation of wave become it is strong or due to be ultra-wide band domain send thus send power density and be lower.

Therefore, it in order to also meet the requirement for above-mentioned various communication in high frequency band, is just used in research and utilization The extensive MIMO of super antenna with multiple radiators (Massive MIMO (multiple-input and multiple-output (Multiple Input Multiple Output))).In super antenna with multiple radiators, by controlling amplitude and/or phase from each element transmission/received signal, energy Enough form wave beam (antenna directivity).Such processing is also referred to as beam forming (BF:Beam Forming), it becomes able to drop Low radio wave propagation loss.

According to above embodiment 1, different beam formings is applied between symbol, can obtain diversity (wave beam point Diversity gain), the downlink/uplink that can will send the control information of downlink and/or uplink controls signal Structure is set as being suitable for the structure of beam forming.

When selecting control channel candidate, the feedback information and/or letter for carrying out user terminal is also can be used in wireless base station The reciprocity (Reciprocity) in road used the channel estimation of reference signal.

In addition, each control channel candidate corresponds respectively to different subcarriers in Fig. 3, further, across being capable of conduct Region (whole symbol #0-#3) that control channel uses and be mapped.It is however not limited to such structural example, for example, can Control channel candidate is mapped according to cell environment, channel status etc..At this point, with allocation unit, that is, CCE (control of control channel Channel element (Control Channel Element)) unit is mapped.

For example, can be mapped as shown in Figure 4 and 5.In the example shown in these figures, if to 4 symbols point Different wave beams is not distributed.But it is such as aforementioned without being limited thereto.In Fig. 4, control channel candidate #0 and Fig. 3 are same across whole Symbol SB#0-#3 and be mapped.

On the other hand, control channel candidate #1-3 is carried out the distribution different from the structure of Fig. 3.Control channel candidate #1 Across symbol SB#0, #1 by Continuous Mappings.Control channel candidate #2 is discretely mapped to symbol SB#0, #3.Further, it controls Channel candidate #3 processed is mapped to different subcarriers in symbol SB#1, #2.That is, control channel candidate #3 is applied frequency hopping.

In the structural example of Fig. 5, compared with the structural example of Fig. 4, control channel candidate #0, #2 is differently mapped.Control It is identical that channel candidate #0 leap whole symbol SB#0-#3 is mapped this point, but is mapped to phase until symbol SB#0-#2 Same frequency resource (subcarrier, frequency band) is on the other hand assigned to the frequency different from symbol SB#0-#2 in symbol SB#3 Rate resource.That is, in control channel candidate #0, it can be as the mapping of whole symbols in the region that control channel uses except leap In addition, also frequency hopping is applied.

Control channel candidate #2 is mapped to symbol SB#0, #3, but is assigned respectively different frequency band.That is, except discrete Mapping other than, also by apply frequency hopping.

According to Fig. 4 and example shown in fig. 5, it is not only structure shown in Fig. 3, additionally it is possible to map more diverse control letter Road is candidate.

(embodiment 2)

Then, referring to Fig. 6 and Fig. 7, illustrate embodiment 2.In Fig. 6, the 1 of user terminal is being sent to from wireless base station Multiple control channels are shown candidate in the resource of subframe amount.Fig. 7 indicates the distribution of the control channel candidate in control channel region Concrete example.

Other structures in addition to the mapping structure of control channel candidate are identical as above-mentioned embodiment 1.For example, scheming In 6, code element number in 1 subframe be 28 or 4 symbols of beginning be set so as to as control channel using this point with Embodiment 1 is identical.In addition, setting (distribution) respectively different wave beam in the symbol SB#0-SB#3 of control channel BF#1-BF#3 this point is also identical.

In Fig. 6, control channel candidate #0-#3 is assigned different frequencies (subcarrier), and is respectively mapped to 1 In symbol.Control channel candidate #0 is mapped in symbol SB#3, and control channel candidate #1 is mapped in symbol SB#2, control Channel candidate #2 is mapped in symbol SB#1, and control channel candidate #3 is mapped in symbol SB#0.

According to the structure of such embodiment 2, wireless base station can select any one from control channel candidate, with institute The resource of the control channel candidate of selection sends control information.Here, multiple control channel candidates are respectively mapped to difference Symbol, different wave beams is set in each symbol.Therefore, in the case where application different beam forming, wireless base station energy Enough selections can obtain beam selection effect for sending the optimum beam of control information.

In addition, in the case where corresponding to down control channel and send uplink control channel, leading in embodiment 2 The wave crossed using wave beam corresponding with down control channel and send above-mentioned uplink control channel, and will be used to send in base station side Beam is applied to receive, so as to realize optimal transmitting and receiving wave beam.

In addition, in the example shown in Fig. 6, control channel candidate is mapped to respectively different frequency band.It is however not limited to This can also set identical frequency band in multiple control channel candidates.In this case, set in the symbol being mapped Fixed wave beam is different.

In addition, different wave beams is set to each symbol in Fig. 6, but not limited to this.For example, even if identical being set The symbol of wave beam have it is multiple in the case where, the frequency band (for example, subcarrier) of the channel candidate being mapped is different.In the situation Under, it cannot achieve beam selection effect between the symbol for being set same beam, but replace, information is controlled sending When, it is able to carry out the selection of frequency resource corresponding with user terminal.

, can also be same as above-mentioned embodiment 1 in embodiment 2, wireless base station is candidate in selection control channel When, it carries out having used reference signal using the reciprocity (Reciprocity) of the feedback information and/or channel that carry out user terminal Channel estimation.

Control channel candidate is with allocation unit, that is, CCE (control channel element (Control Channel of control channel Element)) unit is mapped.For example, can be mapped as shown in Figure 7.In Fig. 7, control channel candidate #0 is reflected It is mapped to symbol SB#2, control channel candidate #1 is mapped to symbol SB#3.Control channel candidate #0 and #1 are mapped to different Symbol (by apply different beam formings), although and be assigned a part repeat be different frequency band (frequency resource). Therefore, in any one for selecting control channel #0 and #1, beam selection effect can be obtained, and obtains frequency selection Effect.

On the other hand, in Fig. 7, control channel candidate #2, #3 are respectively mapped to symbol SB#0, #1.Here, these are controlled Channel candidate #2, #3 processed uses same frequency resource.It is available same in any one for selecting control channel #2 and #3 Beam selection effect in frequency band.

Example according to figure 7 is not only structure shown in fig. 6, additionally it is possible to it is candidate to map more diverse control channel.

The notification method > in < control channel region

Then, referring to attached drawing, illustrate the notification method in the control channel region in above embodiment 1,2.

In existing LTE system, in 1 subframe, the 1-3 symbol of beginning can be utilized as control channel.Therefore, Even if considering in the increased situation of code element number of 1 subframe due to using high frequency band, the code element number for control channel region As variable.

Illustrate how to notify the control channel region in above embodiment 1,2 referring to attached drawing in view of such situation Total code element number.In the notification method, the code element number and/or expression of total code element number in control channel region and every 1 subframe are joined The information of manifold (Numerology) bundlees (association) and is notified.User terminal can implicitly grasp control letter as a result, Total code element number in road region.

In fig. 8 a, the example that the code element number of the code element number and every 1 subframe that show control channel region is bundled.Specifically For, in the case where the code element number of every 1 subframe is 14, the code element number in control channel region is set to 2.Equally, in every 1 son In the case that the code element number of frame is 28,56,112, the code element number in control channel region is each set to 4,8,16.

In the fig. 8b, the parameter set of the code element number and expression parameter collection that show control channel region indexes the example bundled Son.Specifically, indexing 0,1,2,3 code element numbers 2,4,8,16 that control channel region has been set separately to parameter set.

Here, parameter set is illustrated.In the wireless access way (5G RAT) of following wireless communication system, it is Support the service of broadband or the different multiplicity of requirement condition, it is contemplated that introduce more than one parameter set.Parameter set refers to frequency The set of messaging parameter (wireless parameter) in rate and/or time orientation.It can wrap in the set of the messaging parameter, such as also Containing at least one of subcarrier spacing, Baud Length, CP length, TTI length, the code element number of every TTI, wireless frame structure.

In addition, above-mentioned parameter collection index determines different parameter set, but " parameter set is different " refer to such as subcarrier spacing, At least one of Baud Length, CP length, TTI length, the code element number of every TTI, wireless frame structure are different between parameter set, however It is without being limited thereto.

In above-mentioned notification method, as the method for the code element number or parameter set for notifying every 1 subframe, consider that (1) uses The method of high-level signaling (Higher-layer signaling), (2) are carried out using the method for MIB, SIB, (3) and carrier frequency The method of binding.

According to above control channel region notification method, the control channel set in 1 subframe can be suitably notified Region.Receiving side is able to carry out the detection of control channel candidate based on the information being notified.In addition it is also possible to structure is combined with (association) control channel area is bundled with the structure (information, index etc.) for determining the information of parameter set at the code element number of 1 subframe Total code element number in domain.

In addition, 1CCE is set to 9REG in existing LTE system, but in embodiment 1,2, it can also be new Set the size of 1CC.Therefore, numerical value shown in Fig. 8 A, Fig. 8 B is only an example.

In addition, many code element numbers are used to control by consideration with because being increased using the code element number of 1 subframe caused by high frequency band Channel region.It in this case, can also be to multiple symbols using identical beam forming (setting wave beam).That is, passing through Different beam formings (setting different wave beams) is applied at least two symbol, can expect beam diversity in the embodiment 1 Effect can expect beam selection effect in embodiment 2.

The search space < determining method >

Then, referring to attached drawing, illustrate the search space determining method in embodiment 1,2.

User terminal obtains the downlink for being sent to itself by the way that the search space in control channel region is carried out blind decoding Control information.As above-mentioned, caused by because using high frequency band in the increased situation of code element number of 1 subframe, accompanying this, control are considered The code element number of channel region will increase.In the case where the code element number in control channel region is significantly increased, it is contemplated that in control channel This candidate advantage of many control channels can be set in region, but on the other hand, since search space number increases, so thinking Number to user terminal retrieval control channel candidate (by search space blind decoding) increases, and applies to user terminal and bear.

Accordingly, it is considered to even if in the case where the code element number in control channel region is significantly increased, when determining search space, Also CCE number or control channel candidate's number are limited between the symbol in control channel region.In addition, CC number and control channel are candidate Numerical example can explain such as in 1 symbol of mapping object as " information content " or " index for indicating information content ".

" the case where embodiment 1 "

Fig. 9 and Figure 10 is the figure for illustrating the search space determining method in embodiment 1.In the embodiment 1, Between the symbol in control channel region, CCE number is restricted.Specifically, in the case where control channel crosses over multiple symbols, into Row is set so that the CCE number between symbol becomes same degree (sieve subtracts search space pattern).In addition, here, with control channel area The code element number in domain is 4 and is illustrated.

In Fig. 9, polymerization grade 1, in the case where down control channel candidate's number is 6, to the CCE of each symbol allocation Number is set to either one or two of (1,1,2,2) or (2,2,1,1).It equally, is 2 and down control channel candidate in polymerization grade In the case that number is 6, (3,3,3,3) are set to the CCE number of each symbol allocation.

In addition, in the case where polymerization grade is 4 and down control channel candidate's number is 2, to the CCE number of each symbol allocation It is set to (6,6,6,6).In the case where polymerization grade is 8 and down control channel candidate's number is 2, to each symbol allocation CCE number is set to (12,12,12,12).

It, can be as shown in Figure 10 A- Figure 10 D with each polymerization grade based on the CCE number being set as shown in Figure 9 Configure search space.

For example, if in Fig. 9 pay close attention to polymerization grade 1, to the CCE number of each symbol allocation be defined as (1,1,2,2) with And either one or two of (2,2,1,1).Since down control channel candidate's number is set to 6, so also considering to each symbol allocation CCE number is pattern as such as (0,0,0,6) or (1,0,3,2), but subtracts 2 patterns shown in Fig. 9 by sieve, can be pressed down The number of receiving side (user terminal) retrieval control channel candidate processed, the number that blind decoding is carried out in search space.

As more than, in the case where control channel crosses over multiple symbols, the CCE number set between symbol distributes each code element The difference of CC number becomes 1 or less (sieve subtracts search space pattern), so as to time for inhibiting user terminal retrieval control channel candidate Number, the number that blind decoding is carried out in search space.Thereby, it is possible to inhibit the processing of user terminal to load (calculation amount).Separately Outside, polymerization grade or down control channel candidate number shown in Fig. 9 is without being limited thereto according to existing LTE system.In addition, at this In embodiment, set so that CC number difference become 1 hereinafter, but be not limited to 1 this number, can set for inhibit exist The optimal number of the number of blind decoding is carried out in search space.

" the case where embodiment 2 "

Figure 11 and Figure 12 is the figure for illustrating the search space determining method in embodiment 2.In embodiment 2 In, between the symbol in control channel region, control channel candidate's number is restricted.Specifically, being limited to 1 symbol in control channel In interior situation (the case where being closed in 1 symbol), set so that the difference of control channel candidate's number between symbol becomes 1 or less (sieve subtracts search space pattern).In addition, here, it is same as embodiment 1, it is 4 progress with the code element number in control channel region Explanation.

Control in Figure 11, in the case where polymerization grade is 1 and down control channel candidate's number is 6, in each symbol Channel candidate number is set to (2,2,1,1).Equally, the case where polymerization grade is 2 and down control channel candidate's number is 6 Under, control channel candidate's number in each symbol is set to (1,1,2,2).

In addition, the control channel in the case where polymerization grade is 4 and down control channel candidate's number is 2, in each symbol Candidate number is set to (1,1,0,0).In the case where polymerization grade is 8 and down control channel candidate's number is 2, in each symbol Control channel candidate's number be set to (0,0,1,1).

In addition, there are the controls of assigned downlink in the case where control channel region is more than down control channel candidate's number The symbol of channel candidate and the symbol for being not previously allocated down control channel candidate, but also can be set to only pre-determined Symbol in allocation of downlink control channel it is candidate.When polymerization grade is 4 in the example of Figure 11, only to the 1st, 2 symbol allocation Down control channel is candidate, only candidate to the 3rd, 4 symbol allocation down control channel when polymerization grade is 8.

Based on the control channel candidate's number being set as shown in Figure 11, can as shown in Figure 12 A- Figure 12 D with Each polymerization grade configures search space.

As more than, in the situation (the case where being closed in 1 symbol) that control channel is limited in 1 symbol, by being set Determine so that control channel candidate's number between symbol is able to suppress user terminal inspection as same degree (sieve subtracts search space pattern) The number of rope control channel candidate, the number that blind decoding is carried out in search space.Thereby, it is possible to inhibit the place of user terminal Reason load (calculation amount).In addition, polymerization grade shown in Figure 11 or down control channel candidate number be in accordance with existing LTE system, And it is without being limited thereto.

The application examples > of < embodiment 1,2

Then, illustrate the application examples of embodiment 1,2.For example, the structure of embodiment 1 can be applied to UE common search UE as space (UE Common Search Space, C-SS) public control channel region.In addition, embodiment 2 It is specific that structure can be applied to UE as the specific search space UE (UE Specific Search Space, UE-SS) Control channel region.

In the embodiment 1, due to across be assigned different beams symbol and mapping control information, so can will UE public control information is sent to whole UE in cell.In addition, in embodiment 2, since different waves are being assigned In multiple symbols of beam, the mapping control information in 1 symbol, so can specific UE into cell send control information.

Sending method > in the case where < SC transmission

Then, the case where illustrating in embodiment 1,2 using SC transmission (DFT-spread OFDM transmission).In the feelings It, can also be to control channel application Comb (interlaced FDMA (IFDMA:Interleaved Frequency under condition Division Multiple Access)).In addition, in the case where control channel region is multiple symbols, it can also be using jump Frequently.

(wireless communication system)

Hereinafter, illustrating the structure of the wireless communication system of present embodiment.In the wireless communication system, using above-mentioned each The wireless communications method of mode.In addition, the wireless communications method of above-mentioned each mode can be applied individually, it can also combine and answer With.

Figure 13 is the figure for indicating an example of the outline structure of wireless communication system of present embodiment.In wireless communication system In 1, it can apply multiple basic frequency blocks (component load with the system bandwidth of LTE system (such as 20MHz) for 1 unit Wave) it has been set as the carrier wave polymerization (CA) and/or dual connection (DC) of one.In addition, wireless communication system 1 can also be referred to as SUPER 3G, LTE-A (LTE-Advanced), IMT-Advanced, 4G, 5G, FRA (following wireless access (Future Radio Access)), NR (new wireless access technology (New RAT:New Radio Access Technology)) etc..

Wireless communication system 1 shown in Figure 13 includes forming the wireless base station 11 of macrocell C1 and being configured in macro small Area C1 is interior and forms wireless base station 12a~12c of the small cell C2 narrower than macrocell C1.In addition, in macrocell C1 and respectively User terminal 20 is configured in the C2 of small cell.Also it can be set in minizone and/or cell using different parameter sets Structure.

User terminal 20 is connectable to wireless base station 11 and this both sides of wireless base station 12.The imagination of user terminal 20 passes through CA or DC and simultaneously using use different frequency macrocell C1 and small cell C2.In addition, user terminal 20 is able to use Multiple cell (CC) (for example, 2 or more CC) Lai Yingyong CA or DC.In addition, user terminal can utilize authorization band domain CC With unauthorized band domain CC, as multiple cells.

In addition, user terminal 20 can be used in each cell time division duplex (TDD:Time Division Duplex) or Person's frequency division duplex (FDD:Frequency Division Duplex) communicates.Cell, the cell of FDD of TDD can also divide It Bei Chengwei not TDD carrier wave (frame structure type 2), FDD carrier wave (frame structure Class1) etc..

In addition, single parameter set can be applied in each cell (carrier wave), multiple and different parameter sets can also be applied.

Between user terminal 20 and wireless base station 11, bandwidth is able to use in relatively low frequency band (for example, 2GHz) Narrow carrier wave (referred to as existing carrier wave, conventional carrier (Legacy carrier) etc.) is communicated.On the other hand, at user's end Between end 20 and wireless base station 12, band can be used in relatively high frequency band (for example, 3.5GHz, 5GHz, 30~70GHz etc.) Wide carrier wave, also can be used and the identical carrier wave between wireless base station 11.In addition, the frequency band that each wireless base station is utilized Structure it is without being limited thereto.

(alternatively, between 2 wireless base stations 12) wired connection (example can be set as between wireless base station 11 and wireless base station 12 Such as, in accordance with optical fiber, the X2 interface etc. of CPRI (common public radio interface (Common Public Radio Interface))) Or the structure being wirelessly connected.

Wireless base station 11 and each wireless base station 12 are connected respectively to upper station arrangement 30, and connect via upper station arrangement 30 It is connected to core network 40.In addition, in upper station arrangement 30 including, for example, access gate device, radio network controller (RNC), Mobility management entity (MME) etc., but not limited thereto.In addition, each wireless base station 12 can also be connected via wireless base station 11 To upper station arrangement 30.

In addition, wireless base station 11 is the wireless base station with relatively wide coverage area, macro base station can also be referred to as, converged Poly- node, eNB (eNodeB), transmitting and receiving point etc..In addition, wireless base station 12 is the wireless base of the coverage area with part It stands, small base station, micro-base station, femto base station, femto base station, HeNB (family (Home) eNodeB), RRH can also be referred to as (long distance wireless head (Remote Radio Head)), transmitting and receiving point etc..Hereinafter, not distinguishing wireless base station 11 and 12 In the case of, collectively referred to as wireless base station 10.

Each user terminal 20 is the terminal for supporting the various communication modes such as LTE, LTE-A, not only may include mobile communication Terminal also may include fixed communication terminal.In addition, user terminal 20 can carry out terminal between other users terminal 20 Between communicate (D2D).

In wireless communication system 1, as wireless access way, OFDMA (orthogonal frequency can be applied to downlink (DL) Divide multiple access) and SC-FDMA (he Single Carrier-Frequency Division multiple access) can be applied to uplink (UL).OFDMA is to be divided into frequency band Multiple narrow-bands (subcarrier), and map the data into the multicarrier transmission mode that each subcarrier is communicated.SC-FDMA is By the way that system bandwidth is divided into the band domain that by 1 or continuous resource block is constituted by every terminal, multiple terminals use mutual Different band domain, to reduce the single carrier transmission mode of the interference of terminal room.In addition, the wireless access side of uplink and downlink Formula is not limited to these combinations, and OFDMA can also be used in UL.

In wireless communication system 1, as DL channel, channel is shared (also referred to as using the DL that each user terminal 20 is shared Physical down link sharing channel (PDSCH:Physical Downlink Shared Channel), DL data channel etc.), it is wide Broadcast channel (Physical Broadcast Channel (PBCH:Physical Broadcast Channel)), L1/L2 control channel etc..Pass through PDSCH transmission user data or higher layer control messages, SIB (system information block (System Information Block)) etc.. In addition, transmitting MIB (Master Information Block (Master Information Block)) by PBCH.

L1/L2 control channel includes DL control channel (PDCCH (physical downlink control channel (Physical Downlink Control Channel)), EPDCCH (enhanced physical downlink control channel (Enhanced Physical Downlink Control Channel))), PCFICH (Physical Control Format Indicator Channel (Physical Control Format Indicator Channel)), PHICH (physical mixed ARQ indicate channel (Physical Hybrid- ARQ Indicator Channel)) etc..Pass through the downlink control of scheduling information of the PDCCH transmission comprising PDSCH and PUSCH Information (down link control information (DCI:Downlink Control Information)) etc..It is used for by PCFICH transmission The OFDM symbol number of PDCCH.EPDCCH by with PDSCH frequency division multiplexing, be equally used for transmission DCI etc. with PDCCH.By PHICH, At least one of PDCCH, EPDCCH can transmit repeating transmission instruction information (ACK/NACK) for the HARQ of PUSCH.

In wireless communication system 1, as UL channel, channel is shared (also referred to as using the UL that each user terminal 20 is shared Physical uplink shared channel (PUSCH:Physical Uplink Shared Channel), UL data channel etc.), UL control Channel (physical uplink control channel (PUCCH:Physical Uplink Control Channel)) processed, random access Channel (Physical Random Access Channel (PRACH:Physical Random Access Channel)) etc..Pass through PUSCH transmission User data, higher layer control messages.Retransmission control information (A/N) or channel state information (CSI) comprising DL signal etc. are extremely Few one ascending control information (uplink control information (UCI:Uplink Control Information)) passes through PUSCH or PUCCH and transmitted.By PRACH, can transmit for establishing the random access preamble connecting with cell Code.

The wireless base station < >

Figure 14 is the figure for indicating integrally-built an example of wireless base station of present embodiment.Wireless base station 10 includes multiple Transmission/reception antennas 101, transmits and receives unit 103, baseband signal processing unit 104, call treatment list at amplifier unit 102 Member 105 and transmission path interface 106.Alternatively, it is also possible to be configured to transmission/reception antennas 101, amplifier unit 102, hair Receiving unit 103 is sent to separately include 1 or more.

The user data of user terminal 20 is sent to from wireless base station 10 by downlink, from upper station arrangement 30 via Transmission path interface 106 is input to baseband signal processing unit 104.

In baseband signal processing unit 104, about user data, PDCP (Packet Data Convergence Protocol (Packet is carried out Data Convergence Protocol)) processing of layer, segmentation/combination of user data, RLC (wireless spread-spectrum technology (Radio Link Control)) retransmit control etc. rlc layers transmission processing, MAC (media access control (Medium Access Control control)) is retransmitted (for example, HARQ (mixed spin system (Hybrid Automatic Repeat ReQuest)) transmission processing), scheduling, transformat selection, channel coding, fast Fourier inverse transformation (IFFT:Inverse Fast Fourier Transform) the transmissions processing such as processing, precoding processing, and be transmitted to and transmit and receive unit 103.This Outside, about downgoing control signal, the transmissions such as channel coding or fast Fourier inverse transformation processing is also carried out, and be transmitted to transmission and connect Receive unit 103.

Transmit and receive the base that unit 103 will carry out precoding by every antenna from baseband signal processing unit 104 and be exported Band signal transforms to radio band, and sends.The wireless frequency signal quilt after frequency transformation is carried out in transmitting and receiving unit 103 Amplifier unit 102 amplifies, and is sent from transmission/reception antennas 101.

Transmit and receive unit 103 can by based on the common transmitter for recognizing and illustrating in technical field of the invention/ Receiver, transmitter/receiver circuit or transceiver are constituted.In addition, transmitting and receiving unit 103 can be used as integrated hair It send receiving unit to constitute, can also be made of transmission unit and receiving unit.

On the other hand, about UL signal, the wireless frequency signal received in transmission/reception antennas 101 is in amplifier list It is amplified in member 102.It transmits and receives unit 103 and receives the UL signal after being amplified in amplifier unit 102.It transmits and receives single It is baseband signal that member 103, which will receive signal frequency converting, and is exported to baseband signal processing unit 104.

In baseband signal processing unit 104, the UL data for being included to the UL signal being entered carry out fast Flourier Convert (FFT:Fast Fourier Transform) processing, inverse discrete Fourier transformer inverse-discrete (IDFT:Inverse Discrete Fourier Transform) processing, error correction decoding, MAC retransmit control reception processing, rlc layer and PDCP layers of receiving area Reason, and upper station arrangement 30 is transmitted to via transmission path interface 106.The setting of the progress communication channel of call processing unit 105 Or the management of the condition managing or radio resource of call treatments or the wireless base station 10 such as release.

Transmission path interface 106 transmits and receives signal via defined interface, with upper station arrangement 30.In addition, transmission road Diameter interface 106 can also be via inter-base station interface (for example, in accordance with CPRI (common public radio interface (Common Public Radio Interface)) optical fiber, X2 interface) with adjacent wireless base stations 10 transmit and receive signal (backhaul signaling).

In addition, transmitting and receiving the control channel region that can map multiple control channel candidates of the unit 103 in 1 subframe It is middle to send selected control channel candidate.For example, passing through the control channel candidate's that illustrates in above-mentioned embodiment 1,2 In the control channel candidate that is selected send control information.

Figure 15 is the figure for indicating an example of the functional structure of wireless base station of present embodiment.In addition, Figure 15 is mainly shown The functional block of characteristic in present embodiment, if the other function block that wireless base station 10 also has wireless communication required.Such as Shown in Figure 15, baseband signal processing unit 104 include control unit 301, send signal generation unit 302, map unit 303, Receipt signal processing unit 304 and measuring unit 305.

Control unit 301 implements the whole control in wireless base station 10.Control unit 301, which for example controls, sends signal generation list The mapping of DL signal that the generation for the DL signals that member 302 carries out or map unit 303 carry out, receipt signal processing unit 304 into The measurement that the reception processing (for example, demodulation etc.) of capable UL signal, measuring unit 305 carry out.

Specifically, control unit 301 carries out the scheduling of user terminal 20.For example, control unit 301 can also carry out it is short The scheduling of the different multiple carrier waves of TTI length (DL carrier wave and/or UL carrier wave).In addition, control unit 301 can also carry out commonly The scheduling of the carrier wave (DL carrier wave and/or UL carrier wave) of TTI length.

In addition, control unit 301 can also set the identical and/or different multiple loads of short TTI length to user terminal 20 Wave (DL carrier wave and/or UL carrier wave).Multiple carrier wave uses at least one of high-level signaling, system information, L1/L2 control channel To set.

In addition, control unit 301 is estimated using the channel for using the feedback information and/or reference signal that carry out user terminal The result of meter or the reciprocity (Reciprocity) of channel are being sent out from the control channel candidate of above-mentioned embodiment 1,2 Select optimal control channel candidate when sending control information.Control unit 301 is controlled such that control information is mapped to institute The control channel of selection is candidate.

In addition, control unit 301 is controlled such that control channel candidate is mapped across the different symbol, or Person is only mapped to 1 symbol.

Information or code element number are notified to user terminal in addition, control unit 301 is controlled such that, so as to use structure At the code element number of 1 subframe and at least one party of the information for determining parameter set, can determine for constituting control channel area The code element number in domain.

In addition, control unit 301 is controlled, so that in the situation across different symbol mapping control channel candidates Under, based on CCE (control channel element (Control Channel Element)) number predetermined, to each symbol allocation It is mapped.In addition, being controlled such that in the case where control channel candidate is only mapped to 1 symbol, based on predetermined , control channel candidate's number in above-mentioned symbol maps.

In addition, control unit 301 is controlled, so as to be reflected in control channel region corresponding to control channel candidate The frequency resource and time resource for the symbol penetrated map demodulation reference signal.

Control unit 301 can be by controller, the control of explanation based on common recognize in technical field of the invention Circuit or control device are constituted.

Signal generation unit 302 is sent based on the instruction from control unit 301, DL signal is generated and (comprising DL data, adjusts Spend information, short TTI set information), and export to map unit 303.

The letter illustrated based on common recognize in technical field of the invention can be set as by sending signal generation unit 302 Number generator, signal generating circuit or signal generating apparatus.

Map unit 303 is based on the instruction from control unit 301, by what is generated in sending signal generation unit 302 DL signal is mapped to defined radio resource, and exports and give transmitting and receiving unit 103.Map unit 303 can be set as based on this Mapper, mapping circuit or the mapping device for recognizing jointly and illustrating in the technical field of invention.

Receipt signal processing unit 304 is to the UL signal sent from user terminal 20 (for example, UL data-signal, UL are controlled Signal, UCI, short TTI support information etc.) carry out reception processing (for example, demapping, demodulation, decoding etc.).Specifically, receiving Signal processing unit 304 carries out the reception processing of UL signal based on the parameter set set in user terminal 20.In addition, receiving letter Number processing unit 304 can also will receive signal or receive that treated signal be exported to measuring unit 305.In addition, receiving letter Number processing unit 304 carries out reception processing to the A/N of DL signal, and ACK or NACK are exported to control unit 301.

Measuring unit 305 implements measurement related with the signal received.Measuring unit 305 can be by based on of the invention Measuring appliance, measuring circuit or the measuring device for recognizing jointly and illustrating in technical field is constituted.

Measuring unit 305 for example can also the reception power based on UL reference signal ((reference signal receives for example, RSRP Power (Reference Signal Received Power))) and/or the quality of reception ((reference signal receives matter for example, RSRQ Amount (Reference Signal Received Quality))) measure the channel quality of UL.Measurement result can also be defeated Out to control unit 301.

< user terminal >

Figure 16 is the figure for indicating integrally-built an example of user terminal of present embodiment.User terminal 20 includes being used for Multiple transmission/reception antennas 201 of MIMO transmission, transmit and receive unit 203, baseband signal processing unit at amplifier unit 202 204 and applying unit 205.

The wireless frequency signal received in multiple transmission/reception antennas 201 is put in amplifier unit 202 respectively Greatly.Each unit 203 that transmits and receives receives the DL signal after being amplified in amplifier unit 202.Transmitting and receiving unit 203 will connect Receipts signal frequency converting is baseband signal, and is exported to baseband signal processing unit 204.

204 pairs of the baseband signal processing unit baseband signals inputted carry out FFT processing or error correction decoding, retransmit control Reception processing etc..DL data are forwarded to applying unit 205.Applying unit 205 carry out with it is more high-order than physical layer or MAC layer Layer it is related processing etc..In addition, broadcast message is also forwarded to applying unit 205.

On the other hand, about UL data, baseband signal processing unit 204 is input to from applying unit 205.Believe in base band In number processing unit 204, the transmission processing (for example, the transmission of HARQ is handled) for retransmitting control or channel coding, rate are carried out Match, the processing of censoring, Discrete Fourier Transform (DFT:Discrete Fourier Transform), IFFT processing etc., and forwards To each transmitting and receiving unit 203.About UCI (for example, the retransmission control information of DL, channel state information etc.), channel is also carried out Coding, rate-matched, censoring, DFT processing, IFFT processing etc., and it is transmitted to each transmitting and receiving unit 203.

It transmits and receives unit 203 and the baseband signal exported from baseband signal processing unit 204 is transformed into radio band, and It sends.Wireless frequency signal after carrying out frequency transformation in transmitting and receiving unit 203 is amplified device unit 202 and amplifies, from hair Receiving antenna 201 is sent to be sent.

In addition, transmitting and receiving the control channel region that can map multiple control channel candidates of the unit 203 in 1 subframe Middle reception control channel is candidate.In control channel region, to the different wave beam of different symbol associations, above-mentioned control channel Candidate is mapped at least 1 symbol among different symbols.

The transmitting illustrated based on common recognize in technical field of the invention can be set as by transmitting and receiving unit 203 Machine/receiver, transmitter/receiver circuit or transceiver.In addition, transmitting and receiving unit 203 can be used as integrated transmission Receiving unit is configured, and can also be made of transmission unit and receiving unit.

Figure 17 is the figure for indicating an example of the functional structure of user terminal of present embodiment.In addition, main in Figure 17 The functional block of characteristic in present embodiment is shown, if the other function that user terminal 20 also has wireless communication required Block.As shown in figure 17, the baseband signal processing unit 204 that user terminal 20 has includes control unit 401, sends signal generation Unit 402, map unit 403, receipt signal processing unit 404 and measuring unit 405.

Control unit 401 implements the whole control of user terminal 20.Control unit 401, which for example controls, sends signal generation list The mapping of UL signal that the generation for the UL signals that member 402 carries out or map unit 403 carry out, receipt signal processing unit 404 into The measurement that the reception processing of capable DL signal, measuring unit 405 carry out.

Control information is solved based on the control channel candidate received in addition, control unit 401 is controlled such that Code.In control channel region, to the different wave beam of different symbol associations, the control channel candidate is mapped to described At least 1 symbol among different symbols, in the symbol that control channel candidate is mapped, the information content that can be mapped is pre- First determine.

In addition, control channel candidate is mapped to multiple symbols among the different symbol, or it is mapped to institute State a symbol among different symbols.

Control unit 401 is controlled, so that using the code element number for constituting above-mentioned 1 subframe and for determining parameter set Information at least one party, determine the code element number for constituting above-mentioned control channel region, above-mentioned control information is based on the symbol It counts and is decoded.

In addition, in the case where above-mentioned control channel candidate crosses over the different symbol and is mapped, as upper letter Breath amount is determined in advance CCE (control information element (Control Channel Element)) number of each symbol allocation, controls Unit 401 processed is controlled such that the control information is based on the CCE number and is decoded.

In addition, in the case where above-mentioned control channel candidate is only mapped to above-mentioned 1 symbol, it, should as above- mentioned information amount Control channel candidate's number in symbol is determined in advance, and it is above-mentioned that control unit 401 is controlled such that above-mentioned control information is based on Control channel candidate number and decoded.

In addition, the frequency in above-mentioned control channel region, corresponding to the symbol that above-mentioned control channel candidate is mapped Resource and time resource, demodulation reference signal are mapped, and control unit 401 is controlled such that above-mentioned control information uses Above-mentioned demodulation reference signal and decoded.

Control unit 401 can be by controller, the control of explanation based on common recognize in technical field of the invention Circuit or control device are constituted.

Signal generation unit 402 is sent based on the instruction from control unit 401, generate (for example, coding, rate-matched, Censoring, modulation etc.) UL signal (supporting information comprising UL data-signal, UL control signal, UL reference signal, UCI, short TTI), and It exports to map unit 403.Sending signal generation unit 402 can be set as based on the common understanding in technical field of the invention And signal generator, signal generating circuit or the signal generating apparatus illustrated.

Map unit 403 is based on the instruction from control unit 401, by what is generated in sending signal generation unit 402 UL signal is mapped to radio resource, and exports to unit 203 is transmitted and received.Map unit 403 can be set as based on of the invention Mapper, mapping circuit or the mapping device for recognizing jointly and illustrating in technical field.

(DL data-signal, scheduling information, DL control signal, DL are with reference to letter to DL signal for receipt signal processing unit 404 Number, short TTI set information) carry out reception processing (for example, demapping, demodulation, decoding etc.).Receipt signal processing unit 404 will The information received from wireless base station 10 is exported to control unit 401.Receipt signal processing unit 404 for example by broadcast message, System information, the higher layer control messages based on RRC signaling contour level signaling, Physical layer control information (L1/L2 controls information) etc. It exports to control unit 401.

Receipt signal processing unit 404 can be by the signal of explanation based on common recognize in technical field of the invention Processor, signal processing circuit or signal processing apparatus are constituted.In addition, receipt signal processing unit 404 can constitute this hair Bright receiving unit.

Measuring unit 405 measures channel status based on the reference signal (for example, CSI-RS) from wireless base station 10, and Measurement result is exported to control unit 401.In addition, the measurement of channel status can also be carried out by every CC.

Measuring unit 405 can by based in technical field of the invention the common signal processor for recognizing and illustrating, Signal processing circuit or signal processing apparatus and measuring appliance, measuring circuit or measuring device are constituted.

(hardware configuration)

In addition, for illustrating that the block diagram of above embodiment indicates the block of functional unit.These functional blocks (structural unit) It is realized by the arbitrary combination of hardware and/or software.In addition, being not particularly limited to the realization rate of each functional block.That is, each function Can block will physically and/or can also be logically separated by physically and/or 1 device being joined logically together is realized 2 or more devices directly and/or indirectly (for example, wiredly and/or wirelessly) connect, pass through these multiple devices and realize.

For example, the wireless base station, user terminal etc. in one embodiment of the present invention can also be used as carry out it is of the invention The computer of the processing of wireless communications method plays a role.Figure 18 be indicate one embodiment of the present invention wireless base station and The figure of an example of the hardware configuration of user terminal.Above-mentioned wireless base station 10 and user terminal 20 physically can also be used as Comprising processor 1001, memory 1002, reservoir 1003, communication device 1004, input unit 1005, output device 1006, The computer installation of bus 1007 etc. and be configured.

In addition, in the following description, " device " this term can be read as circuit, equipment, unit etc..Wireless base station 10 and the hardware configuration of user terminal 20 to be configured to each device that will be illustrated include 1 or multiple, also may be constructed For the device not comprising a part.

For example, processor 1001 only illustrates 1, but there can also be multiple processors.In addition, processing can be by 1 Processor executes, and processing can also simultaneously, successively or by other methods by 1 or more processor execute.In addition, processing Device 1001 can also be realized by 1 or more chip.

Each function in wireless base station 10 and user terminal 20 is for example by hard in processor 1001, memory 1002 etc. On part read in as defined in software (program), by processor 1001 carry out operation, control communication device 1004 carry out communication or It controls reading and/or the write-in of memory 1002 and the data in reservoir 1003 and realizes.

Processor 1001 for example operates operating system and controls computer entirety.Processor 1001 can also be by wrapping Containing interface, control device, arithmetic unit, register with peripheral equipment etc. central processing unit (central processing unit (CPU: Central Processing Unit)) it constitutes.For example, above-mentioned baseband signal processing unit 104 (204), call treatment list Member 105 etc. can also be realized by processor 1001.

In addition, processor 1001 from reservoir 1003 and/or communicates program (program code), software module, data etc. Device 1004 is read into memory 1002, executes various processing according to them.As program, using executing computer upper At least part of program of the operation illustrated in the embodiment stated.For example, the control unit 401 of user terminal 20 can also be with It is realized by the control program for being stored in memory 1002 and being operated in processor 1001, about other function Block can also be realized equally.

Memory 1002 is computer-readable recording medium, such as can also be by ROM (read-only memory (Read Only Memory)), EPROM (Erasable Programmable Read Only Memory EPROM (Erasable Programmable ROM)), (electricity can by EEPROM Erasable programmable read-only memory (EPROM) (Electrically EPROM)), RAM (random access memory (Random Access Memory)), at least one kind of composition in other storage mediums appropriate.Memory 1002 can also be referred to as register, high speed Cache (cache), main memory (main storage means) etc..Memory 1002 can save to implement an embodiment party of the invention The wireless communications method of formula and program (program code), the software module etc. being able to carry out.

Reservoir 1003 is computer-readable recording medium, such as can also be by flexible disk (flexible disk), soft Disk (floppy) (registered trademark), photomagneto disk are (for example, compact disk (CD-ROM (Compact Disc ROM) etc.), digital versatile Way disk, Blu-ray (registered trademark) disk), removable disk, hard disk drive, smart card, flash memory device is (for example, card, stick, secret Key driver), at least one kind of composition of magnetic stripe, database, server, other storage mediums appropriate.Reservoir 1003 can also be with Referred to as auxilary unit.

Communication device 1004 is that the hardware for carrying out the communication of intercomputer via wired and or wireless network (is sent Receiving device), also referred to as such as the network equipment, network controller, network interface card, communication module.Communication device 1004 for example in order to Realize frequency division duplex (FDD:Frequency Division Duplex) and/or time division duplex (TDD:Time Division Duplex), also may include HF switch, duplexer, filter, frequency synthesizer etc. is configured.For example, above-mentioned transmission Receiving antenna 101 (201), transmits and receives unit 103 (203), transmission path interface 106 etc. at amplifier unit 102 (202) It can be realized by communication device 1004.

Input unit 1005 is to accept the input equipment from external input (for example, keyboard, mouse, microphone, opening Pass, button, sensor etc.).Output device 1006 is to implement the output equipment to external output (for example, display, loudspeaking Device, LED (light emitting diode (Light Emitting Diode)) lamp etc.).In addition, input unit 1005 and output device 1006 are also possible to become integrated structure (for example, touch panel).

In addition, each device such as processor 1001, memory 1002 is connected by the bus 1007 for communicating It connects.Bus 1007 can be made of single bus, can also be made of different buses between device.

In addition, wireless base station 10 and user terminal 20 may include microprocessor, digital signal processor (DSP: Digital Signal Processor), ASIC (specific integrated circuit (Application Specific Integrated Circuit)), PLD (programmable logic device (Programmable Logic Device)), FPGA (field-programmable gate array Column (Field Programmable Gate Array)) etc. hardware be configured, each functional block of the hardware realization can also be passed through It is some or all.For example, processor 1001 can also be realized by least one of these hardware.

(variation)

In addition, term needed for understanding about the term and/or this specification that illustrate in the present specification, can also set It is changed to the term with same or similar meaning.For example, channel and/or symbol are also possible to signal (signaling).In addition, letter Number it is also possible to message.Reference signal can also be referred to as RS (Reference Signal), can also according to applied standard To be referred to as pilot tone (Pilot), pilot signal etc..In addition, component carrier (CC:Component Carrier) can also be claimed For cell, frequency carrier, carrier frequency etc..

In addition, radio frames can also be made of 1 or multiple periods (frame) in the time domain.Constitute this 1 of radio frames Or multiple each periods (frame) can also be referred to as subframe.Further, subframe can also be in the time domain by 1 or multiple time slots It constitutes.Further, time slot can also be in the time domain by 1 or multiple symbols (OFDM (orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing)) symbol, SC-FDMA (single-carrier frequency division multiple access (Single Carrier Frequency Division Multiple Access)) symbol etc.) constitute.

Radio frames, subframe, time slot and symbol indicate chronomere when transmission signal.Radio frames, subframe, time slot with And other respectively corresponding addresses also can be used in symbol.For example, 1 subframe can also be referred to as transmission time interval (TTI: Transmission Time Interval), multiple continuous subframes can also be referred to as TTI, and 1 time slot can also be referred to as TTI.That is, subframe and/or TTI can be the subframe (1ms) in existing LTE, be also possible to it is shorter than 1ms during (for example, 1-13 symbol), during can also be than 1ms long.In addition, indicating that the unit of TTI can also be referred to as time slot, mini time slot Deng rather than subframe.

Here, TTI for example refers to the minimum time unit of the scheduling in wireless communication.For example, in LTE system, wirelessly Base station is carried out (being capable of the bandwidth used in each user terminal, transmission with TTI unit distributing radio resource to each user terminal Power etc.) scheduling.In addition, the definition of TTI is without being limited thereto.TTI can be the data grouping (transmission after carrying out channel coding Block) sending time unit, the processing unit of scheduling, link circuit self-adapting etc. can also be become.

The TTI of time span with 1ms can also be referred to as usual TTI (TTI in LTE Rel.8-12), common TTI, long TTI, usual subframe, common subframe or long subframe etc..The TTI shorter than usual TTI can also be referred to as shorten TTI, Short TTI, shorten subframe or short subframe etc..

In addition, long TTI (for example, usually TTI, subframe etc.) can also be read as with the time span for being more than 1ms TTI, short TTI (for example, shortening TTI etc.) can also be read as the TTI length with TTI length and 1ms or more less than long TTI TTI.

Resource block (RB:Resource Block) is the resource allocation unit of time domain and frequency domain, in a frequency domain can also be with Comprising 1 or multiple continuous subcarriers (subcarrier (subcarrier)).In addition, RB also may include 1 in the time domain Perhaps multiple symbols are also possible to the length of 1 time slot, 1 subframe or 1TTI.1TTI, 1 subframe can also respectively by 1 or Multiple resource blocks are constituted.In addition, RB can also be referred to as Physical Resource Block (PRB:Physical RB), PRB pair (PRB Pair), RB is to (RB pair) etc..

In addition, resource block can also be made of 1 or multiple resource elements (RE:Resource Element).For example, 1RE is also possible to the radio resource zone of 1 subcarrier and 1 symbol.

In addition, the construction of above-mentioned radio frames, subframe, time slot and symbol etc. is only to illustrate.For example, in radio frames The number for the subframe for including, the number for the time slot for including in subframe, the number of the symbol and RB that include in a slot, in RB In include subcarrier number and the number of symbols in TTI, Baud Length, cyclic prefix (CP:Cyclic Prefix) The structure of length etc. can change variedly.

In addition, the information illustrated in the present specification, parameter etc. can be indicated by absolute value, it can also be by opposite It indicates, can also be indicated by corresponding other information in the relative value of defined value.For example, radio resource can also be with It is indicated by defined index.Further, using formula of these parameters etc. can also with it is explicitly public in the present specification The formula opened is different.

The title for parameter etc. is not restrictive at its all aspect in the present specification.For example, due to various Channel (PUCCH (physical uplink control channel (Physical Uplink Control Channel)), PDCCH of various kinds (physical downlink control channel (Physical Downlink Control Channel)) etc.) and information element can It is identified by all titles appropriate, so distributing these various channels and information element various Title be not restrictive in all respects.

Various different any one of technologies also can be used in information, the signal etc. illustrated in the present specification To indicate.For example, spreading the above-mentioned data for illustrating integrally to can be mentioned that, instruction, order, information, signal, bit, symbol, chip Deng voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or photon or their arbitrary group can also be passed through It closes to indicate.

In addition, information, signal etc. can be exported from high level to low layer, and/or from low layer to high level.Information, signal etc. Output can be entered via multiple network nodes.

Information, the signal etc. of institute's input and output can be stored in specific place (for example, memory), can also be in pipe It is managed in reason table.Information, the signal etc. of institute's input and output can be overwritten, update or write afterwards.Institute can also be deleted Information, signal of output etc..Inputted information, signal etc. can also be sent to other devices.

The notice of information is not limited to the mode/embodiment illustrated in the present specification, can also by other methods into Row.For example, the notice of information can also be by physical layer signaling (for example, Downlink Control Information (down link control information (DCI:Downlink Control Information)), ascending control information (uplink control information (UCI:Uplink Control Information))), high-level signaling is (for example, RRC (wireless heterogeneous networks (Radio Resource Control)) signaling, broadcast message (Master Information Block (MIB:Master Information Block), system information block (SIB: System Information Block)) etc.), MAC (media access control (Medium Access Control)) signaling), Other signals or their combination are implemented.

In addition, physical layer signaling can also be referred to as (1/ layer 2 of layer (Layer 1/Layer 2)) control information of L1/L2 (L1/L2 controls signal), L1 control information (L1 controls signal) etc..In addition, RRC signaling can also be referred to as RRC information, such as It is also possible to RRC connection setting (RRCConnectionSetup) message, RRC connection reconstruct (RRCConnectionReconfiguration) message etc..In addition, MAC signaling for example passes through MAC control element (MAC CE (Control Element)) and be notified.

In addition, the notice (for example, the notice of " being X ") of defined information is not limited to explicitly carry out, it can also be implicitly (for example, by the notice without the defined information or passing through the notice of other information) carries out.

Determine to carry out by the value (0 or 1) indicated by 1 bit, it can also be by by true (true) or false (false) true-false value (boolean) indicated carries out, and can also pass through the comparison (for example, compared with defined value) of numerical value It carries out.

No matter software is known as software, firmware, middleware, microcode, hardware description language, it is also known as other names Claim, should all be broadly interpreted as being meant that instruction, instruction set, code, code segment, program code, program, subprogram, software Module, application, software application, software package, routine (routine), subroutine, object, executable file, execution thread, process, Function etc..

In addition, software, order, information etc. can also be transmitted and received via transmission medium.For example, using cable technology (coaxial cable, optical cable, twisted pair, digital subscriber line (DSL:Digital Subscriber Line) etc.) and/or wireless technology (infrared ray, microwave etc.) from website, server or other remote sources send software in the case where, these cable technologies and/or Wireless technology is contained in the definition of transmission medium.

Term as " system " and " network " used in the present specification may be used interchangeably.

In the present specification, " base station (BS:Base Station) ", " wireless base station ", " eNB ", " cell ", " sector ", Term as " cell group ", " carrier wave " and " component carrier " may be used interchangeably.Base station is also sometimes referred to as fixed station (fixed station), NodeB, eNodeB (eNB), access point (access point), sending point, receiving point, millimicro are small The terms such as area, small cell.

Base station can accommodate 1 or multiple (for example, 3) cells (also referred to as sector).It is accommodated in base station multiple small In the case where area, the coverage area of base station can integrally be divided into multiple smaller regions, and each smaller region can also Enough by base station sub-system (for example, indoor small base station (long distance wireless head (RRH:Remote Radio Head)) mentions For communication service.Term as " cell " or " sector " refer in its coverage area carry out communication service base station and/or A part or entirety of the coverage area of base station sub-system.

In the present specification, " mobile station (MS:Mobile Station) ", " user terminal (user terminal) ", Term as " user apparatus (UE:User Equipment) " and " terminal " may be used interchangeably.Base station is also claimed sometimes For fixed station (fixed station), NodeB, eNodeB (eNB), access point (access point), sending point, receiving point, The terms such as Femto cell, small cell.

Mobile station is also generally referred to by those skilled in the art as subscriber station, mobile unit, subscriber unit, radio-cell, remote sometimes Cheng Danyuan, mobile device, wireless device, wireless telecom equipment, remote equipment, mobile subscriber station, access terminal, mobile terminal, Wireless terminal, remote terminal, handheld device, user agent, mobile client, client or other certain arts appropriate Language.

In addition, the wireless base station in this specification can also be read as user terminal.For example, about by wireless base station and Communication between user terminal is replaced into the communication of (equipment is to equipment (D2D:Device-to-Device)) between multiple user terminals Structure afterwards can also apply each mode/embodiment of the invention.In this case, it also can be set to by user terminal 20 Structure with function possessed by above-mentioned wireless base station 10.In addition, the terms such as " uplink " and " downlink " can also be interpreted For " side ".For example, up channel can also be read as side channel.

Equally, the user terminal in this specification can also be read as wireless base station.In this case, also can be set to by Wireless base station 10 has the structure of function possessed by above-mentioned user terminal 20.

In the present specification, the specific operation for being set as being carried out by base station is according to circumstances sometimes by its host node (upper Node it) carries out.In the network being made of 1 with base station or multiple network nodes (network Nodes), in order to The various operations that terminal is communicated and carried out obviously can be by 1 or more network node (example other than base station, base station Such as, it is contemplated that MME (mobility management entity (Mobility Management Entity)), S-GW (gateway (Serving-Gateway)) etc., but it is not limited to them) or their combination progress.

Each mode/the embodiment illustrated in the present specification may be used alone, can also be used in combination, can also companion Switch use with execution.In addition, the treatment process of each mode/embodiment illustrated in the present specification, timing, flow chart As long as, can also be with reversed order Deng not contradiction.For example, about the method illustrated in the present specification, with illustrative sequence The element for prompting various step is not limited to suggested specific sequence.

Each mode/the embodiment illustrated in the present specification also can be applied to LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (forth generation mobile communication system (4th generation mobile communication system)), 5G (the 5th generation Mobile communication system (5th generation mobile communication system)), FRA (the following wireless access (Future Radio Access)), New-RAT (wireless access technology (Radio Access Technology)), NR it is (new Wirelessly (New Radio)), NX (new wireless access (New radio access)), the FX (following wireless access (Future Generation radio access)), GSM (registered trademark) (global system for mobile communications (Global System for Mobile communications)), CDMA2000, UMB (Ultra-Mobile Broadband (Ultra Mobile Broadband)), IEEE 802.11 (Wi-Fi (registered trademarks)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (ultra wide band (Ultra-WideBand)), Bluetooth (registered trademark), system and/or base using other wireless communications methods appropriate Successor-generation systems after they are extended.

The record of " being based on " for using in the present specification is unless separately express, and otherwise its meaning is not " being based only upon ".It changes Yan Zhi, the record of " being based on " are meant that " being based only upon " and " being at least based on " this both sides.

Any reference to the element for having used the addresses such as " first ", " second " used in the present specification is non-overall Limit the quantity or sequence of these elements.The convenient method that these addresses can be used as between the element for distinguishing 2 or more exists It is used in this specification.Therefore, first and second element be not can only use 2 elements or with any shape referring to meaning The first element of formula must be prior to second element.

The term of " judgement (decision) (determining) " that uses in the present specification has comprising diversified operation The case where.For example, " judgement (decision) " can also be by calculating (calculating), calculating (computing), processing (processing), export (deriving), investigation (investigating), retrieval (looking up) (for example, table, Retrieval in database or other data configurations), confirmation (ascertaining) etc. is considered as having carried out " judgement (decision) ". In addition, " judgement (decision) " can also be by reception (receiving) (for example, receiving information), transmission (transmitting) (example Such as, send information), input (input), output (output), access (accessing) (for example, access memory in number According to) etc. be considered as carrying out " judgement (decision) ".In addition, " judgement (decision) " can also be by solution (resolving), selection (selecting), (choosing) is selected, (establishing) is established, compares (comparing) etc. and be considered as carrying out " judgement (decision) ".That is, any operation can also be considered as having carried out " judgement (decision) " by " judgement (decision) ".

Term as " connection (connected) " that uses in the present specification, " coupling (coupled) " or they Any deformation be meant that directly or indirectly any connection or coupling between 2 or the element more than it, can Include mutual " connection " either neutral element between 2 elements of " coupling " there are 1 or more than it the case where.Between element Coupling or connection can be physically, be also possible in logic, or be also possible to their combination.For example, " even Connect " it can also be read as " accessing ".In the case of using in this manual, alternatively it is conceivable to 2 elements by using 1 or Electric wire, cable and/or printing electrical connection more than it, and as some non-limiting and non-packet capacitive example, by making With the electromagnetic energy with wireless frequency-domain, the wavelength in microwave region and/or light (visible light and black light this both sides) region Deng, and mutually " connection " or " coupling ".

Used in this specification or claims " include (including) ", " including (comprising) " with And in the case where their deformation, these terms and term " having " are equally meant that inclusiveness.Further, in this specification Either term used in claims " or (or) " meaning is not logic exclusive or.

More than, it is described in detail about the present invention, it is clear to a person skilled in the art that the present invention is not It is defined in the embodiment illustrated in the present specification.The present invention can not depart from this hair determining by the record of claims Bright objective and range and as correcting and change mode is implemented.Therefore, the record of this specification be with illustrate for Purpose does not have the meaning of any restrictions to the present invention.

The application is based on Patent 2016-192339 filed on September 29th, 2016.It herein include entire contents.

Claims (6)

1. a kind of user terminal characterized by comprising

Receiving unit in control channel region in 1 subframe, can mapping multiple control channel candidates, receives control letter Road is candidate；And

Control unit, be controlled such that the control channel candidate that is received based on the receiving unit to control information into Row decoding,

In the control channel region, to the different wave beam of different symbol associations, the control channel candidate is mapped To at least 1 symbol among the different symbol,

In the symbol that the control channel candidate is mapped, the information content that can be mapped is determined in advance.

2. user terminal as described in claim 1, which is characterized in that

The control channel candidate is mapped to multiple symbols among the different symbol, or is mapped to the difference Symbol among a symbol.

3. the user terminal as described in claim 1 or claim 2, which is characterized in that

Described control unit is controlled, so that using the code element number for constituting 1 subframe and for determining parameter set Information at least one party, determine the code element number for constituting the control channel region, and the control information be based on it is described Code element number and decoded.

4. such as described in any item user terminals of claim 1 to claim 3, which is characterized in that

In the case where the control channel candidate crosses over the different symbol and is mapped, as the information content, to each CCE (control channel element (Control Channel the Element)) number of symbol allocation is determined in advance, described control unit It is controlled such that the control information is based on the CCE number and is decoded.

5. such as described in any item user terminals of claim 1 to claim 3, which is characterized in that

Control in the case where the control channel candidate is only mapped to 1 symbol, as the information content, in the symbol Channel candidate number processed is determined in advance, and described control unit is controlled such that the control information is waited based on the control channel It selects number and is decoded.

6. a kind of wireless communications method is the wireless communications method in user terminal, comprising:

In control channel region in 1 subframe, that multiple control channel candidates can be mapped, it is candidate to receive control channel；With And

It is controlled such that and control information is decoded based on the received control channel candidate,

It is characterized in that,

In the control channel region, to the different wave beam of different symbol associations, the control channel candidate is mapped To at least 1 symbol among the different symbol, in the symbol that control channel candidate is mapped, the information content that can map It is determined in advance.