CN104521306B - Resource allocation signal - Google Patents

Abstract

Illustrate a kind of mobile telecommunication system, wherein in the mobile telecommunication system, base station reduces scatteredization due to the resource allocation in subframe caused by there are control data in the resource of user data for carrying using enhanced distribution technique.It illustrates to include different solutions below：It provides to supplement the supplemental information that existing resource distributes data, using heavy duty so that DCI format can have different explanations, and provides new DCI format.

Description

Resource allocation signal

Technical field

The present invention relates to the control signalings for resource allocation in communication system.The present invention particularly but not exclusively relates to And UTRAN (the UMTS Terrestrial Radio Access of long term evolution (Long Term Evolution, LTE) Network, UMTS Terrestrial Radio Access Network network) the efficient distribution of following resource in system, the resource be used for using signal come Physical Resource Block (physical resource used in communication downlink and/or uplink user data communication Block, PRB) distribution.

Background technology

In LTE communication system, in order to enable user apparatus sends and receives data via air interface, need to this User apparatus distributes physical radio resource, and must notify its resource allocation to the user apparatus using control signaling. In LTE, physical downlink control channel (physical downlink control channel, PDCCH) carries scheduling Distribution and other control information, and serving BS is dynamically distributed for notifying scheduling using the user in direction of signal cell The PDCCH resource of distribution.

PDCCH includes the collection of one or more continuous control Channel Elements (control channel element, CCE) It closes, wherein CCE occupies the sub-fraction of the available physical radio resource of base station cell.The sum of available CCE in cell Dependent on the system bandwidth of cell and to the quantity for being directed to the retained OFDM symbol of PDCCH transmission in stator frame.In general, needle Retain PDCCH first three symbol of subframe.According to LTE versions 11 and the above version, can use generally directed to physical down The radio resource that link shared channel (PDSCH) is distributed is including additional control channel information.This additional control channel One example of information is referred to as enhancing PDCCH (ePDCCH).However, in PDSCH be arranged ePDCCH cause in PDSCH The related problem of efficient resource allocation (because this leads to assigned resource scatteredization), and additional resource is needed to distribute skill Art solves these shortcomings.

Invention content

According on one side, the present invention provides a kind of communication node, for being led to via wireless interface and user apparatus Letter, the communication node include：Transceiver circuit, a series of hair for carrying out signal with the user apparatus using subframes It send and receives, wherein each subframe includes multiple communication resource blocks, each resource block, which corresponds to, is used for the communication section in system bandwidth The subband that point is communicated with the user apparatus, and each resource block has the control section for carrying the first control data With the data portion for carrying user data；And resource distribution module, be configured as in subframe distribution for institute State the resource block that user apparatus is communicated, wherein the resource distribution module is configured as：I) it generates to the user apparatus The first resource of transmission distributes data, the first resource distribution data distribution for the user apparatus communicating user data More than first a resource blocks；Ii at least one resource block) is distributed, to be carried in the data portion of at least one resource block Data are controlled for the second of the user apparatus, at least one resource block is included in first resource distribution data institute In more than described first a resource blocks of distribution；And iii) the Secondary resource distribution data sent to the user apparatus are generated, The user apparatus can distribute data using the Secondary resource be distributed from the first distribution data more than first At least one resource block for carrying the second control data is excluded in resource block.

The Secondary resource distribution data combined with first resource distribution data can be identified for carrying State at least one resource block of the second control data.

The Secondary resource distribution data can distribute more than first a resource blocks that data are distributed with the first resource Relatively come identify for carry it is described second control data at least one resource block.

Multiple resource blocks of subframe can be only fitted in a series of resource block groups and first resource distribution data can To distribute the resource block in one or more resource block groups selected in the resource block group.In this case, described Two resource allocation datas may include bitmap, the position in the bitmap and the resource in selected one or more resource block groups Block is corresponding and identifies for carrying the described second at least one resource block for controlling data.

The first distribution data may include at least one of following data：I) it is used to identify more than distributed first The bitmap of a resource block；And ii) for identifying starting resource block and being distributed multiple from the starting resource block The data of resource block.

At least one resource block can be dispensed in known resource block subset and Secondary resource distribution number At least one resource block is identified according to reference to the known resource block subset.

It can be arranged and will be used to identify that the third control data of the known resource block subset are sent to the user apparatus Transceiver circuit etc. component.The component can send the third before the communication node sends the subframe It controls data or the third control data can be sent in the subframe, the known resource block subset can be solid It is fixed or can be changed according to subframe.

In alternative embodiments, at least one resource block is dispensed in one of multiple predefined resource block subsets, And the Secondary resource distribution Data Identification includes the described second one or more predefined resource block for controlling data Subset, to be excluded from multiple resource blocks that the first distribution data are distributed.In this case, each predefined money Source block subset has associated index value and the second control Data Identification and includes the described second control data one Or multiple predefined associated index values of resource block subset.

In general, communication node communicates the resource block used in subframe with multiple user apparatus, and by each Two control data individually or are integrally sent to each user apparatus.If the second control data are individually sent to each user to fill It sets, then can different second be controlled data is sent to each user apparatus.In this case, the resource distribution module can To generate the first distribution data for first user device and first distribution for second user device respectively Data are distributed data for described the first of first user device and are determined for the first distribution data of second user device Justice has overlapping for the resource block of first user device distribution and for the resource block of second user device distribution, And different the second control data are generated for the first user device and the second user device, so that each use Family device excludes resource block to eliminate the overlapping.

The first distribution data and the second distribution can be sent in enhanced physical downlink control channel (ePDCCH) Data.

The resource distribution module can distribute Physical Resource Block or virtual resource blocks.

The present invention also provides a kind of user apparatus, and for being communicated with communication node, the user apparatus includes：Transmitting-receiving A series of device circuit, for carrying out sending and receiving for signal with the communication node using subframes, wherein each subframe includes Multiple communication resource blocks, each resource block is corresponding with the subband of the system bandwidth of the communication node, and each resource block has Control section for carrying the first control data and the data portion for carrying user data；And communication control module, It is configured as：I) receive first resource and distribute data, first resource distribution data distribution for the communication node A resource block more than the first of communicating user data；Ii at least one resource block) is received, in the data of at least one resource block It is carried in part and controls data for the second of the user apparatus, at least one resource block is included in the first resource In more than described first a resource blocks that distribution data are distributed；Iii it) receives and controls the described of data with for carrying described second The related Secondary resource of at least one resource block distributes data；And iv) from it is described first distribution data distributed more than first At least one resource block for carrying the second control data is excluded in a resource block.

The communication control module can be configured as：With first resource distribution data it is combined use described the Two resource allocation datas, to identify at least one resource block for carrying the second control data.

The Secondary resource distribution data can distribute more than first a resource blocks that data are distributed with the first resource Relatively come identify for carry it is described second control data at least one resource block.

Multiple resource blocks of subframe can be only fitted in a series of resource block groups and first resource distribution data can To distribute the resource block in one or more resource block groups selected in the resource block group.In this case, described Two resource allocation datas may include bitmap, the position in the bitmap and the resource in selected one or more resource block groups Block is corresponding and identifies for carrying the described second at least one resource block for controlling data.

The first distribution data may be configured to distribute continuous resource block group as more than described first a resource blocks, Although it is necessary that this, which is not,.

The first distribution data may include at least one of following data：I) it is used to identify more than distributed first The bitmap of a resource block；And ii) for identifying starting resource block and being distributed multiple from the starting resource block The data of resource block.

At least one resource block can be dispensed in predefined resource block subset and Secondary resource distribution Data can identify at least one resource block with reference to the predefined resource block subset.In such a case, it is possible to set Receiving part is set, the receiving part receives the third for identifying the predefined resource block subset and controls data.It is described to connect Receiving component can be configured as receiving the third control data or the receiving part before the user apparatus receives subframe Part can receive the third control data in subframe.

The subset of predefined resource block can be static or can change for each subframe.

In alternative embodiments, at least one resource block can be dispensed on one of multiple predefined resource block subsets Interior, the Secondary resource distribution Data Identification includes the described second one or more predefined resource block for controlling data Collection and the communication control module are configured as, and institute is excluded from multiple resource blocks that the first distribution data are distributed Resource block in the predefined resource block subset of mark.In this case, each predefined resource block subset has association Index value and the second control Data Identification with include the second control data one or more it is described predefined The associated index value of resource block subset.

The first distribution data and the second distribution data can be in enhanced physical downlink control channel That is it is sent in ePDCCH.

The present invention also provides a kind of method carried out in communication node, the communication node is filled via wireless interface and user It sets and is communicated, be the described method comprises the following steps：The transmission of signal is carried out with the user apparatus using a series of subframes And reception, wherein each subframe includes multiple communication resource blocks, each resource block, which corresponds to, is used for the communication node in system bandwidth The subband communicated with the user apparatus, and each resource block have for carry the first control data control section and Data portion for carrying user data；And allocation step, in subframe distribution for the user apparatus into The resource block of row communication, wherein the allocation step includes：I) the first resource distribution number sent to the user apparatus is generated According to the first resource distribution data distribution is for more than first a resource blocks with the user apparatus communicating user data；ii) At least one resource block is distributed, to carry for the user apparatus in the data portion of at least one resource block Two control data, at least one resource block are included in more than described first moneys that the first resource distribution data are distributed In source block；And iii) the Secondary resource distribution data sent to the user apparatus are generated, the user apparatus can use The Secondary resource distribution data exclude to be distributed in more than first a resource blocks that data are distributed from described first for carrying At least one resource block of the second control data.

The present invention also provides a kind of method that user apparatus is carried out, the user apparatus is communicated with communication node, It the described method comprises the following steps：Sending and receiving for signal is carried out with the communication node using a series of subframes, wherein Each subframe includes multiple communication resource blocks, and each resource block corresponds in system bandwidth for the user apparatus and the communication section The subband that is communicated of point, and each resource block has control section for carrying the first control data and for carrying user The data portion of data；And communication control step comprising：I) it receives first resource and distributes data, the first resource point It is distributed for more than first a resource blocks with the communication node communicating user data with data；Ii at least one resource) is received Block, carried in the data portion of at least one resource block for the user apparatus second control data, it is described extremely A few resource block includes in more than described first a resource blocks that first resource distribution data are distributed；Iii) receive with The related Secondary resource of at least one resource block for carrying the second control data distributes data；And iv) from It is excluded in more than first a resource blocks that the first distribution data are distributed for carrying described in the second control data extremely A few resource block.

The present invention also provides a kind of communication nodes according to another aspect, for being carried out via wireless interface and user apparatus Communication, the communication node include：A series of transceiver circuit, for carrying out signal with the user apparatus using subframes It sends and receives, wherein each subframe includes multiple communication resource blocks, each resource block, which corresponds to, is used for the communication in system bandwidth The subband that node is communicated with the user apparatus；Communication control module, for control and the communication of the user apparatus, and And be configured as controlling data and be sent to the user apparatus with one of multiple predefined control data formats, it is described predefined Control data format include respectively contain not multiple Traditional control data formats of isotopic number and respectively with Traditional control data Format has the new control data format of the one or more of identical digit；And resource distribution module, it is configurable to generate money Data, the resource block for being used to be communicated with the user apparatus in the resource allocation data distribution subframe are distributed in source, wherein The communication control module is configured as：The resource point is included using one of selected described predefined control data format With data, and including the resource allocation using there is the control data format of identical digit with another control data format In the case of data, additional control data profit is signaled to the user apparatus, to indicate which is notified of using signal A control data format.

The communication control module can be configured as that the control data format or another different control data will be used The additional control data profit of format is signaled to the user apparatus.

The resource allocation data of first Traditional control data format may include：

For indicating the field from the resource block group subset selected in multiple resource block group subsets；And

Field including bitmap, the single resource in the difference selected resource block group subset of addressing of position in the bitmap Block.

The resource allocation data of first new control data format can have phase with the first Traditional control data format Same digit, and may include：

Field for indicating one subregion of selection from K subregion of the system bandwidth of the communication node, wherein respectively Portions of bandwidth includes continuous resource blocks；And

Field including bitmap, the single resource block in the difference selected portions of bandwidth of addressing of position in the bitmap and Indicate whether the resource block of institute's addressing is assigned to the user apparatus.

Optionally, the resource allocation data of the first Traditional control data format may include：

For indicating the field from the resource block group subset selected in multiple resource block group subsets；And

Field including bitmap, the single resource in the difference selected resource block group subset of addressing of position in the bitmap Block.

The resource allocation data of first new control data format can have phase with the first Traditional control data format Same digit, and include：

The field of the starting resource block of the resource block subregion in system bandwidth for indicating the communication node；And

Field including bitmap, the single resource block in the difference addressing resource block subregion of position in the bitmap and indicate should Whether resource block is assigned to the user apparatus.

In this case, the field of the expression starting resource block of the described first new control data format may include | log₂(N_RB) | position, and the field including bitmap of the described first new control data field includes Position, wherein N_RBIt is the quantity of available resource block, and P defines the quantity of the resource block in each subset.

Optionally, the field of the expression starting resource block of the described first new control data format may include | log₂(N_RB)| Position, and the field including bitmap of the described first new control data field includesPosition, wherein N_RBIt is available resources The quantity of block, and P defines the quantity of the resource block in each subset.

The first Traditional control data format and the first new control data format can also include control data word Section, the control data field expression are the first Traditional control data format or the first new control data format.

This aspect of the invention also provides a kind of user apparatus, for being communicated with communication node via wireless interface, The user apparatus includes：Transceiver circuit, a series of transmission for carrying out signal with the communication node using subframes And reception, wherein each subframe includes multiple communication resource blocks, the subband phase of each resource block and the system bandwidth of the communication node It is corresponding；Communication control module for control and the communication of the communication node, and is configured to：I) from the communication Node receives the control data of one of multiple predefined control data formats, and the predefined control data format includes respectively wrapping Multiple Traditional control data formats containing not isotopic number and respectively there is with Traditional control data format one of identical digit Or multiple new control data formats, received control data bag include resource allocation data, the resource allocation data distribution Resource block in subframe for being communicated with the communication node；And ii) received control data use with it is another In the case that one control data format has the control data format of identical digit, receives and indicate which has been used control data lattice The additional control data of formula；And control data interpretation module, it is used for based on received additional control data, according to described Traditional control data format explains received control data format according to the new control data format.

The communication control module can be configured as receiving the additional control data using the control data format.

The communication control module can be configured as receiving the additional control using another different control data format Data processed.

The present invention is also provided for disclosed all methods in corresponding user communication device or network communication dress Set the corresponding computer program or computer program product of execution.The present invention also provides be configured as or can be configured as It realizes the user communication device of its method and component and network communication device and updates these method.

Description of the drawings

Pass through the detailed description for embodiment described in following given only in an example and refer to the attached drawing, this hair Bright these and various other aspects will become obvious：

Fig. 1 schematically shows multiple users including being communicated with the base station for being connected to telephone network and moves (honeycomb) electricity The communication system of words；

Fig. 2 a schematically show the interchangeable frame knot used in the communication via the Radio Link progress of system shown in Figure 1 Structure；

Fig. 2 b are schematically shown is divided into the mode of resource block and by time slot dividing at multiple OFDM by frequency sub-carrier The mode of symbol；

Fig. 3 is the block diagram for the primary clustering for showing base station shown in FIG. 1；

Fig. 4 is the block diagram for the primary clustering for showing mobile phone shown in FIG. 1；

Fig. 5 shows the mode that resource block is theoretically divided into control channel (PDCCH) and data channel (PDSCH)；

Fig. 6 a schematically show 0 resource allocation of mode and usage type that Physical Resource Block is grouped as to resource block group How technology can distribute resource block group；

Fig. 6 b schematically show 2 resource allocation of mode and usage type that Physical Resource Block is grouped as to resource block group How technology can distribute the resource in resource block group；

Fig. 6 c and 6d are schematically shown is grouped as the mode of resource block group and how by resource block group by Physical Resource Block It is configured in subset, and shows how 1 resource allocation techniques of usage type can distribute the mode of the resource in each subset；

Fig. 7 is shown in the case of 0 resource allocation techniques of usage type, enabling is distributed for PDSCH and ePDCCH A kind of resource distribution mode of different resource block in same resource block group；

Fig. 8 is shown in the case of 2 resource allocation techniques of usage type, enabling is distributed for PDSCH and ePDCCH Another resource distribution mode of different resource block in same resource block group；

Fig. 9 shows to explain the distribution of traditional type 1 in a new way to control the efficient resource point of data and PDSCH combinations The mode matched；

Figure 10 shows to explain the distribution of traditional type 1 in a new way to control the efficient resource of data and PDSCH combinations The another way of distribution；

Figure 11 shows the example of enhancing PDSCH resource allocation types 0；

Figure 12 shows the example of enhancing PDSCH resource allocation types 2；

Figure 13 a and 13b show traditional PDSCH resource allocation types 1 of 20MHz bandwidth；And

Figure 14 shows tool, and there are four the examples of the enhancing resource allocation type 1 of the 20MHz bandwidth of subregion.

Specific implementation mode

It summarizes

Fig. 1 schematically show mobile phone 3-0,3-1 and 3-2 user can via base station 5 and telephone network 7 with it is other Movement (honeycomb) telecommunication system 1 that user's (not shown) is communicated.In the present embodiment, base station 5 uses orthogonal frequency Multiple access accesses (orthogonal frequency division multiple access, OFDMA) technology by downlink Data are sent to mobile phone 3；And mobile phone 3 accesses (FDMA) technology come by the upper of them using single-carrier frequency division multiple access Uplink data is sent to base station 5.Data are sent and received in order to allow mobile phone 3 via air interface, need (profit With base station 5) to the distribution Physical Resource Block of mobile phone 3, and the physical down link (in the case of LTE) must be utilized to control Control signaling in channel (PDCCH) notifies its resource allocation to mobile phone 3.

LTE sub-frame data structures

Before discussing base station 5 and distributing the concrete mode of resource to mobile phone 3, explanation is directed to 8 (Rel of LTE versions 8) and the generic frame structure arranged of the above version, to illustrate what content is these resources represent.As described previously for downlink Link uses OFDMA technologies, so that user data can be sent to each mobile phone 3 by base station 5 via air interface；And SC-FDMA technologies are used for uplink, so that their data can be sent to by mobile phone 3 via air interface Base station 5.According to the data volume to be sent in all directions, base station 5 (in scheduled time quantum) distributes different subcarriers To each mobile phone 3.These subcarriers and time distribution are defined as the Physical Resource Block (PRB) in LTE specifications.PRB is thus With time and frequency dimension.Base station 5 is directed to each device just serviced and dynamically distributes PRB, and will be for point of each subframe With being signaled to each scheduled mobile phone 3 via PDCCH profits.

Fig. 2 a show the generic frame structure arranged for the LTE communication via air interface and base station 5.As schemed Show, a frame 13 is 10msec long, and includes 10 subframes 15 (also known as Transmission Time Interval that the duration is 1msec (Transmission Time Interval,TTI)).Each subframe or TTI include two time slots for the duration being 0.5msec 17.According to being using normal or extension cyclic prefix (cyclic prefix, CP), each time slot 17 includes six or seven A OFDM symbol 19.The sum of available subcarrier depends on the overall transfer bandwidth of system.LTE specifications system band Parameter used in wide 1.4MHz~20MHz, and a PRB is currently defined as a time slot 17 including 12 continuous sons Carrier wave (although this obviously can be different).The down link signal transmitted include the duration be N_symbA OFDM symbol N_BWA subcarrier.As shown in Figure 2 b, the down link signal can be indicated using resource grid.20 table of each frame in grid Show the single sub-carrier for a symbol period, and each frame 20 is referred to as resource element.As shown, each PRB 21 is by 12 A continuous subcarrier is constituted, and each subcarrier has 7 symbols (in this case)；Although actually the of each subframe 15 Identical distribution has also been carried out in two time slots 17.

Base station

Fig. 3 is the block diagram for the primary clustering for showing the base station 5 used in the embodiment of the present invention.As shown, base station 5 Including transceiver circuit 31, wherein the transceiver circuit 31 can be used for via one or more antennas 33 and mobile phone 3 into Row signal sends and receives, and can be used for carrying out sending and receiving for signal with telephone network 7 via network interface 35. One or more controllers 37 control the operation of transceiver circuit 31 according to the software stored in memory 39.The software package Include operating system 41, communication control module 43, resource distribution module 45 and scheduler module 47 etc..

Communication control module 43 can be used for logical between control base station 5 and mobile phone 3 and between base station 5 and network 7 Letter.Resource distribution module 45 can be used for distributing transceiver circuit 31 and be made with the communication of mobile phone 3 in transceiver circuit 31 Resource, to receive uplink data from mobile phone 3 and down link data is sent to mobile phone 3.Dispatch mould Block 47 can be scheduled mobile phone 3 for the data communication device in a series of subframes 15, to form base station 5 and mobile electricity Air interface between words 3.Resource distribution module 45 and scheduler module 47 work together, to generate resource allocation data and will fit When DCI control data be sent to mobile phone 3, thereby using new technology as described below come to these mobile phones 3 notify The distribution of data.

Mobile phone

Fig. 4 schematically shows the primary clustering of each mobile phone 3 shown in FIG. 1.As shown, mobile phone 3 includes Transceiver circuit 71, the wherein transceiver circuit 71 can be used for carrying out signal via one or more antennas 73 and base station 5 It sends and receives.As shown, mobile phone 3 further includes at least one controller 75, wherein at least one controller 75 is controlled The operation of mobile phone 3 processed, and it is connected to transceiver circuit 71 and loud speaker 77, microphone 79, display 81 and keyboard 83.Controller 75 works according to the software instruction stored in memory 85.As shown, these software instructions include behaviour Make system 87 and the internal communication control module 89 etc. with control data interpretation module 91.Communication control module 89 can be used for making The resource distributed with base station 5 controls the communication with base station 5.Control data interpretation module 91 be configured as (using it is following more The mode being discussed in detail) control information of the explanation received by the base station 5, with determine it is being distributed by base station 5, for mobile phone 3 when being communicated with base station 5 used resource.

In the above description, base station 5 and mobile phone 3 are described as having multiple separation modules for the ease of understanding (communication control module, resource distribution module and scheduler module etc.).It is for example changed although can be directed in this way Existing system is to realize that the specific application of the present invention provides these modules, but in other applications, such as from the beginning In view of in the system designed by creative feature, these modules can be built in overall OS or code, thus this A little modules can not be recognized as separation entity.In the case where providing separate modular, can be carried out using individual module State the function of one or more of module module.For example, resource distribution module can be carried out using single scheduler module The function of function and scheduler module.

Resource allocation

Resource distribution module 45 is distributed resource block 21 to movement in a manner of the integral multiple of a resource block in frequency domain Phone 3.The least resource unit of distribution to mobile phone is a resource block 21.These resource blocks are not necessarily adjacent to each other.Base station 5 Which determine to distribute resource to mobile phone 3.Scheduling decision is made by scheduler module 47, and can be directed to every The Transmission Time Interval (TTI) of 1ms is modified.According to the prior art, dispatching algorithm used in base station 5 considers different shiftings Radio link quality situation, overall interference situation, the service quality (Quality of Service) of mobile phone 3 require kimonos Priority of being engaged in etc..

Fig. 5 shows a resource block 21 across two time slots (subframe 15), and shows in physical down link control Usually how to divide the resource in block between channel (PDCCH) 23 processed and physical down link shared channel (PDSCH) 25. PDCCH 23 is for servicing various uses.First, PDCCH 23 will be for that will dispatch decision (that is, uplink transmission and downlink chain The dispatching distribution of road transmission) it is sent to each mobile phone 3.PDCCH 23 is located in preceding several OFDM symbols of subframe 15.Son The additional Physical Control Format Indicator Channel carried in specific resource element in first OFDM symbol of frame 15 (Physical Control Format Indicator Channel, PCFICH) is used to represent the OFDM symbol of PDCCH Quantity (1,2,3 or 4 symbol is all possible).Since the load of PDCCH can be according to the mobile phone 3 in cell Quantity and PDCCH 23 on the signaling format that transmits and change, it is therefore desirable to PCFICH.The information carried on PDCCH is known as Down link control information (DCI).According to the purpose of control message, the DCI of different-format is defined.About the more of DCI format Details, reader please refer to TR36.213 (V10.6.0), and content is included herein by reference.

Fig. 5 shows to send the situation of PDCCH 23 using first three OFDM symbol of subframe 15.Remaining resource is carried Supply PDSCH 25.However, sometimes, the off-capacity of preceding several OFDM symbols is to carry the mobile electricity for being directed to base station 5 and just servicing All desired control data of words 3, and have to be proposed in the OFDM symbol commonly used in PDSCH 25 recently and transmit for each Some control data of a mobile phone 3.For example, the transmission control in the control channel for being referred to as enhancing PDCCH (ePDCCH) Data.Control channel capacity is not only increased using these ePDCCH channels, also so that the proprietary beam forming of mobile phone and frequency Rate selectively scheduling can be applied to ePDCCH transmission, and coordinate ePDCCH between neighbor base station cell to reduce interference more It is easy.However, transmitting ePDCCH in the OFDM symbol commonly used in carrying PDSCH 25 can cause to be carried out with base station 5 The related problem of efficient resource allocation in PDSCH 25.In order to understand these problems, it will now describe and be about scheduled on LTE communication system Workable different types of resource allocation techniques in system, wherein these resource allocation techniques include the distribution of type 0, Class1 point With with type 2 distribute.

Type 0 is distributed

Fig. 6 a illustrate how Physical Resource Block 21 being grouped as multiple continuous resource blocks groups (RBG) 27.In possible situation Under, each group includes the resource block for the equal amount for being known as RBG sizes (P), but be not in the quantity of continuous resource blocks can be on schedule For the RBG sizes of prestige strictly in the case of segmentation, last group may include less resource block.Fig. 6 a show that RBG sizes are 4 Situation, and first five RBG, i.e. RBG0~RBG 4 is shown.

In the resource allocation of type 0, (base station generated and be sent to mobile phone 3) resource block assignment information Including indicating distribution to the bitmap of the resource block group (RBG) of the scheduled mobile phone 3.RBG is suitable towards bitmap bit mapping Sequence is as follows：By RBG0~RBGN_RBG- 1 MSB~LSB (although this it is of course possible to be opposite way) for being mapped to bitmap.Such as 3GPP, Described in the 7.1.6.1 sections of TR36.213 (V10.6.0), if the corresponding bit value in bitmap is 1, RBG is distributed to movement Otherwise phone 3 does not distribute RBG to mobile phone 3.Fig. 6 a show the one of the bitmap 29 distributed to scheduled mobile phone 3 Partial example, to show in this case scheduled mobile phone 3 be assigned group RBG0, RBG1, RBG3 and Resource block in RBG4.

As it will be appreciated by those skilled in the art that the also transmission control data in the region for being commonly assigned to PDSCH 25 In the case of, although some resources in RBG 27 do not include control data, these resources may also be not used to carry user Data.For example, if carrying the ePDCCH for being directed to scheduled mobile phone 3 (or for another mobile electricity using RBG 15 The ePDCCH of words), then since 0 resource allocation data of traditional type only can distribute resource as unit of resource block group, Other resources in same resource block group can not distribute to PDSCH.This leads to scatteredization of available resources and using waste.

Type 2 is distributed

In the resource allocation of type 2, such as 3GPP, described in the 7.1.6.3 sections of TR36.213 (V10.6.0), resource block Distribute the virtual resource blocks that information indicates one group of continuous dispensing to scheduled mobile phone 3.For DCI format 1A, type 2 provides Source allocation field includes and starting resource block (RB_start) corresponding resource indicated value (RIV) and virtual continuous dispensing money The length L of source block_CRB.Fig. 6 b show RB1 being identified as starting resource block and include length value corresponding with 14 resource blocks Example resources distribute 30 (this means that RB1~RB14 is distributed to the scheduled mobile phone 3 in the subframe 15).So And for the distribution continuous resource blocks of mobile phone 3 and for the DL (downlink) of same mobile phone 3 mandates and UL In the case that (uplink) authorizes the ePDCCH of the two to be located in these continuous resource blocks, 2 resource allocation of type is problematic (problem can equally be well applied to 0 resource allocation of type).Particularly, it if mobile phone 3 can not detect that UL is authorized, will lead It causes mobile phone 3 that can not be decoded to PDSCH and causes and (receive down link data for confirming) DL HARQ slow Device is rushed to be destroyed.Further, since harq buffer device is destroyed, therefore can not restore these errors of transmission by HARQ re-transmissions, because And it must be retransmitted by higher (that is, rlc layer).Simple solution for the problem is that limitation is distributed to scheduled The range of the resource of mobile phone 3, so that the PDSCH resources distributed and control data are not be overlapped, but this will cause again The invalid use (that is, gap) of available resources in PDSCH 25.

Class1 distributes

In the resource allocation of Class1, resource block group is divided into subset.Fig. 6 c and 6d show the example of the situation.It is special Not, these, which are illustrated, supports the resource block of 20MHz bandwidth to be divided into 100 resource blocks.These resource blocks are grouped as respectively 25 resource block groups (RBG0~RBG24) of self-contained four resource blocks (size=4 RBG).To physics in the whole bandwidth Resource block continuously indexs (for 20MHz, usually 0~99).

Resource block group is further configured to be evenly distributed on multiple subsets in whole bandwidth, wherein these subsets respectively Including multiple resource block groups.All for the interval between the resource block group in the quantity and subset of the RBG subsets of specific bandwidth etc. In RBG sizes.By way of illustration, in the example of Fig. 6 c and 6d, 25 resource block groups are configured to four (that is, being directed to The RBG sizes of 20MHz) subset.A subset includes the 1st, the 5th, the 9th, the 13rd, the 17th, the 21st and the 25 resource block groups；Second subset includes the 2nd, the 6th, the 10th, the 14th, the 18th and the 22nd resource block group； Third subset includes the 3rd, the 7th, the 11st, the 15th, the 19th and the 23rd resource block group；And the 4th subset Including remaining resource block group.

The different bandwidth supported are split using similar method.Table below shows for different band Wide RBG sizes (and subset quantity).

Wherein：" P " is RBG sizes (and quantity of RBG subsets), andIt is to divide for downlink transmission The quantity for the resource block that bandwidth obtains.

As described in TS 36.213, for the resource block in selected RBG subsets, 1 resource allocation techniques of traditional type are adopted With a resource 1 position in the block.Class1 can not distribute the continuous resource blocks of more than one RBG (that is, Class1 can only be handled Distributed resource blocks are to realize frequency diversity gain), thus the application for frequency selective scheduling of the type 1 is limited System.In detail, as Fig. 6 c and 6d are respectively shown in, Class1 resource allocation has following field：

With ceil (log₂P) the first field of position, the selected RBG subsets being used to refer in RBG subsets.

With 1 the second field, it is used to refer to the displacement of the resource allocation span in subset.Place value 1 indicates to the right Triggering displacement (Right Aligns shown in Fig. 6 d).Otherwise, triggering displacement (left-justify shown in Fig. 6 c) to the left.

Third field includes bitmap, the resource block in the difference selected RBG subsets of addressing of position in the bitmap. The size of the field is as follows：

Therefore, scheduled mobile phone 3 identifies the first field used in received resource allocation data The subset of RBG, is shifted left using the second field identifying distribution or dextroposition, and identifies the son using third field The resource block being assigned concentrated.

New resources distribution technique

Will now describe helps at least to alleviate multiple new resources distribution of some shortcomings in deficiency discussed above Technology.

Solution 1

As the first solution of at least some of regarding to the issue above problem, base station 5 is additionally configured to generate and mend Fill information (for example, ePDCCH distribution instruction) and send it to mobile phone 3, with indicate which resource block (because comprising EPDCCH is transmitted) and should be from traditional resource distribution (type 0 of version 10 as described above, the resource allocation of Class1 and type 2 Technology) in exclude.Mobile phone 3 (especially controlling data interpretation module 91) is configured as supplemental information and its traditional resource Assignment messages combine, to obtain by the actual downstream link circuit resource of the distribution of base station 5 to the mobile phone 3.In this way, being directed to PDSCH can still distribute following resource block to mobile phone 3, and the resource block itself does not include ePDCCH transmission but the resource Block is the component part for the resource block group for really including at least one ePDCCH transmission.

The mobile phone 3 mutually compatible with the later release of LTE standard (version -11 and the above version) is only enable to read And use supplemental information.Older mobile phone 3 will can not achieve the function, but base station 5 may insure to be directed to these " tradition " The resource allocation of mobile phone 3 does not also include resource used in ePDCCH (or in the OFDM symbol used in PDSCH 25 The other similar control data sent), therefore ensure that the system keeps back compatible.

The configuration of ePDCCH distribution regions

In order to reduce the size of supplemental information, the subset (region " ePDCCH ") of Physical Resource Block can be predefined (in advance for known to 3 the two of base station 5 and mobile phone) can only be located in the resource block subset to apply ePDCCH transmission Limitation.In this case, supplemental information merely have to description should be by which of subset resource block from traditional resource distribution It excludes.The signaling overheads for supplemental information can be significantly reduced in this way.

It can be by higher level signaling (for example, radio resource control (Radio Resource Control, RRC) is believed Enable) or " regions ePDCCH " subset of resource block is advanced with into signal via broadcast channel notify to mobile phone 3.It is optional Ground, based on by higher level signaling or via broadcast channel again profit signal to the predefined pattern of mobile phone 3 or Person is based on unalterable rules, which can dynamically change according to subframe 15.For example, the ePDCCH to stator frame 15 is provided The accurate location of source block collection can for example be related to the cell ID of base station cell and determining for the subframe number of the subframe 15 using certain The calculating of justice indirectly determines.In one embodiment, the resource block in the regions ePDCCH concentrates on a part for system bandwidth, to the greatest extent Pipe makes the resource block in the regions ePDCCH be distributed in whole system bandwidth, so as to the base station 5 in system bandwidth and mobile electricity Transmission (thus increases ePDCCH successfully for the ePDCCH of each mobile phone 3 on the good region of channel status between words 3 It is communicated to the chance of mobile phone 3) it may be more preferable.

The signaling of ePDCCH distribution instructions

The possible form that supplemental information may be used is bitmap, which is directed to each object in ePDCCH area subsets Managing resource block has one, to indicate whether respective resources block will exclude from traditional resource distribution.

It is alternatively possible to pre-defined multiple resource block subsets of different sizes, and each subset is associated with index value. Maintenance is identified the data of resource block subset and its associated index value (for example, searching by base station 5 and mobile phone 3 Table).At work, in each subframe 15, selection is judged as best resource block subset by required ePDCCH by base station 5 Transmission is included in the subframe 15, and is notified associated index value to mobile phone 3 using signal.In response, it moves Mobile phone 3 will receive the sharp index value signaled and will use stored data to identify associated resource block Collection.Then, mobile phone 3 all resource blocks in indicated resource block subset are excluded from its traditional resource distribution (and Whether transmitted comprising ePDCCH no matter these resource blocks are practical).Although this method (because in selected resource block subset it is practical not Including the resource block of ePDCCH transmission will be wasted and) with bit map method compared with resource block use aspect may be less efficient, But in some cases, the size of supplemental information can be smaller compared with bit map method, to reduce signaling overheads.

For how to signal supplemental information profit to mobile phone 3, there are following different options：

EPDCCH DCI formats：For type 0 and both 2, supplemental information can be arranged DCI format as pair A part for Resource Allocation Formula when ePDCCH is configured.Digit needed for the supplemental information is less than or equal to the areas ePDCCH The size of the quantity of the included resource block in domain.For example, for 10MHz system bandwidths supplemental information digit can be 8, One of 12,16 }.

EPCFICH or new DCI formats：It can also be in the case where having an agreement with ePCFICH or it is assumed that new DCI Format indicates that dynamically profit signals with new DCI format next (in each subframe 15) in the case of the regions ePDCCH/resource Supplemental information.Thus, supplemental information will dynamically be indicated according to the set of the resource block of distribution to the regions ePDCCH for all The occupied real resource blocks of ePDCCH of mobile phone 3.In this case, the size of supplemental information is equal to the regions ePDCCH The size of the quantity of included resource block.

It can be respectively notified using signal to each mobile phone 3 using supplemental information as the extension of traditional resource distribution, Or the supplemental information can individually be broadcasted to all mobile phones 3 in base station cell.

If notified respectively using signal to each mobile phone 3 using supplemental information as the extension of traditional resource distribution, It then will allow for notifying different supplemental informations to each mobile phone 3 possibly also with signal.In some schemes, due to for example Allow to traditional resource distribution there are partly overlapping two mobile phones 3 distribution it is proprietary for solving the mobile phone of the conflict Supplemental information (so that same asset is not previously allocated to the two mobile phones 3), this can provide additional flexibility.

In addition, if being notified respectively using signal using supplemental information as the extension of traditional resource distribution to each mobile electricity Words 3 can then synthesize single ePDCCH transmission with supplemental information and traditional resource distribution.

In addition, if (being authorized in ePDCCH in the DL of mobile phone oneself) is using supplemental information as traditional resource distribution It extends and is notified respectively using signal to each mobile phone 3, then supplemental information is without including that the DL of mobile phone oneself is authorized The instruction of ePDCCH distribution, this is because can be assumed that mobile phone 3 authorizes ePDCCH message by means of the mobile phone 3 to DL The fact that carried out decoding is it has been found that the situation.

Further, if notified respectively to each using signal using supplemental information as the extension of traditional resource distribution Mobile phone 3, then supplemental information only need traditional resource distribution weight with mobile phone in description ePDCCH region resource block subsets Folded part was (that is, being not only included in the regions ePDCCH PRB subsets but also being included in the resource in the traditional resource distribution of mobile phone Block).Since mobile phone 3 knows both traditional resource distributions of the regions ePDCCH PRB subsets and their own, mobile phone 3 The lap can be calculated and supplemental information is interpreted accordingly.This will usually reduce the size of supplemental information.However, this is also It will imply that the size of supplemental information is unknown in advance for mobile phone 3, to need to carry out additional blind decoding It attempts.

Particularly, as discussed above, the control data for being sent to mobile phone 3 can have a variety of predetermined formats One of (DCI format respectively has different size), and mobile phone 3 must attempt to be decoded to find out PDCCH 23 Whether PDCCH 23 includes the control data for the mobile phone 3 of one of these formats.Usually not due to mobile phone 3 Know which DCI format may be used, therefore referred to as " blind " decoding is attempted into each decoding and is attempted.Using the mark of mobile phone come The control data for scrambling specific mobile phone 3, only to allow the specific mobile phone 3 to be decoded control data.Cause This, if supplemental information can have variable-size, this will require each mobile phone 3 to be carried out not for each possible size Same blind decoding is attempted.In order to solve this problem, the digit of supplemental information is limited to predefined corresponding different respectively It may be advantageous for one of one group of length (for example, { 2,4,8,12,16 } position) of ePDCCH DCI format sizes.Optionally, may be used To be passed on PDCCH (if present) or on ePCFICH or in the independent ePDCCH only comprising the instruction of DCI format size On defeated, notified to the DCI format size selected in stator frame 15 using only signal.

The example of solution 1

In the portion, it provides and is notified respectively to each using signal using supplemental information as the extension of traditional resource distribution The example of the case where mobile phone 3.

As discussed above, in the resource allocation of type 0, resource block assignment information includes indicating to distribute to scheduled Mobile phone 3 resource block group (RBG) bitmap.Fig. 7 shows to distribute and be directed to the ePDCCH for same mobile phone 3 The example of the PDSCH distribution of the ePDCCH distribution overlappings of other mobile phones 3.In the figure, " part -1 " and traditional resource point It is corresponding with 29 (that is, -10 type 0 of version is distributed), and " part -2 " is corresponding with using the supplemental information 95 of bitmap form. As seen in Figure 7, traditional resource distribution 29 distributes resource block group RBG0, RBG1, RBG3 and RBG4 to mobile phone 3.Fig. 7 shows the bold box regions ePDCCH corresponding with whole resource block group in size, but is typically without as such case. The regions ePDCCH corresponding with resource block group RBG4 and RBG0 all include the PDSCH distribution for mobile phone 3 and are directed to The ePDCCH of mobile phone 3 is distributed and is distributed for the ePDCCH of other mobile phones.As shown in fig. 7, in this example, will mend It fills information 95 and is divided into the bitmap part for being directed to each regions ePDCCH for including both PDSCH distribution and ePDCCH distribution respectively (95a and 95b).In fact, single bitmap 95 is notified that mobile phone 3, then mobile phone 3 will make bitmap using signal Relevant portion is related to the corresponding portion of PDSCH resource allocations 29.

Such as can be seen that from bitmap part 95a will be opposite comprising the resource block of the parts ePDCCH with resource block group RBG4 The position answered is set as value " 0 ", and sets other positions to value " 1 ".This is equally applicable to related with resource block group RBG0 The position of two bitmap part 95b.Therefore, mobile phone 3 can receive traditional resource distribution 29, then using bitmap 95 come from dividing Resource corresponding with ePDCCH transmission is excluded in the resource matched.

About 2 resource allocation of type, as discussed above, traditional resource block distributes information 30 to scheduled mobile electricity The virtual resource blocks of 3 one group of continuous dispensing of instruction of words.Fig. 8 shows the example of this method.As previously described, " part -2 " is mended with new It is corresponding to fill information 97.In this example, part -2 information 97 also use bitmap form (be theoretically divided into part 97a and 97b), traditional class in position difference addressing (also using shown in the bold box) regions ePDCCH and mobile phone of the wherein bitmap Single virtual resource block in the virtual resource set of blocks being overlapped between -2 resource allocation 30 of type, MSB~LSB of bitmap is pressed The increased Sequential Mapping of frequency is to virtual resource blocks.If the place value in 97 field of bitmap is 0, will not for PDSCH23 Corresponding virtual resource blocks are distributed to mobile phone 3, and if the place value in bit field is 1, are directed to PDSCH 23 by phase The virtual resource blocks answered are distributed to mobile phone.In this example, since mobile phone 3 is not previously allocated in resource block group RBG4 Resource, therefore supplemental information 97 is not necessarily to include the position for distributing corresponding part with ePDCCH about RBG4.

Solution 2

It is one or more new by using message digit identical with traditional DCI format definition instead of sending supplemental information DCI format and then which kind of heavy duty (overloaded) format should be used to explain the message to the notice of mobile phone 3, it is existing Part or all in version -10DCI formats may be " weight (in the sense that the use of the term in computer science) Carry ".More specifically, currently, in the case where mobile phone 3 is decoded DCI format, mobile phone 3 according to length and It learns and which kind of DCI format is decoded, thus mobile phone 3 inherently knows how to explain the position in the message.However, By adding size identical new DCI format (in terms of digit), mobile phone 3 does not know how to explain these positions now, This is because needing to explain these positions in different ways between traditional DCI format and new DCI format.Therefore, mobile phone 3 is gone back It need to be apprised of and how to explain message.It is the resource that extended base station 5 uses to allow the purpose of DCI format " heavy duty " in this way The inventory of distribution type, while avoiding the increases of quantity of different DCI format sizes (this will need mobile phone 3 to add Blind decoding attempt)." cost " done so is mobile phone 3 also to be needed to be apprised of received DCI format to be tradition now DCI format or new DCI format.

Base station to mobile phone 3 notify DCI format be it is new or traditional (and with the presence or absence of multiple formats (will Use which of these formats)) mode can be that mobile phone 3 is proprietary or which can be all - 11 device of new version is general.Certainly, conventional mobile phone 3 will only support that (thus base station 5 can will provide traditional DCI format Traditional DCI format is used only in source in the case of distributing to these conventional mobile phones).It can be using higher level signaling come will be to shifting Mobile phone 3 notifies DCI format to be that new or traditional data profit is signaled to mobile phone 3, or can pass through to Traditional DCI format addition " format indicator " field signals the data come dynamically profit.In the traditional DCI format of detection When, UE will reading format indicator first, the rest part of message is then interpreted accordingly.

The example of the solution 2 proposed

In the portion, it provides using heavy duty come example the case where defining new DCI format.

As discussed above, in the resource allocation of type 0, resource block assignment information includes indicating to distribute to scheduled Mobile phone 3 resource block group (RBG) bitmap.Resource allocation type 0 can be made heavily loaded, so that these moneys can be based on Detected ePDCCH in source block group authorizes is directed to the existing of one or more resource block groups to explain in different ways Resource allocation bitmap.For example, if mobile phone 3 detects that DL authorizes ePDCCH transmission in particular resource block group, move Phone 3 can be programmed to be inferred to a part for the PDSCH distribution that the resource block group is mobile phone (note that mould is dispatched in base station Block 47 must correspondingly distribute these resources to mobile phone 3).In such a case, it is possible to by RBG bitmaps 95 with the money The corresponding position of source block group is reused for other purposes.It is, for example, possible to use sharp signal in same resource block is carried out in the position Whether there is or not the UL for same mobile phone 3 to authorize ePDCCH transmission in group.UL can not be detected in mobile phone 3 itself to authorize In the case that ePDCCH is transmitted, this can be useful, but will lead to PDSCH decoding errors.Preferably, by UL mandates and DL Authorized appropriation is in Adjacent resource, so that if this indicates that, there are UL mandates, mobile phone 3 can pass through exclusion and DL Adjacent resource is authorized to be decoded PDSCH.In addition, if the position indicates that there is no UL to authorize, mobile phone 3 is not necessarily to It carries out any blind decoding and authorizes DCI message to attempt to find UL, thus the energy consumption of mobile phone 3 is less.

Enhance Class1 resource allocation

Overcome the problems, such as resource scatteredization because occurring around ePDCCH channel distribution PDSCH for any mobile phone 3 A kind of mode be to make resource allocation mechanism that there is finer RB granularities (that is, a RB resolution ratio), it is continuous can cope with With both discrete resource allocations and be suitable for frequency selective scheduling.There are following options：

Option 1：It is continuous RB horizontal to be reconfigured Class1 resource allocation heavy duty via radio resource control (RRC) Resolution ratio is as follows.

■ default options：It is identical as 1 method of current traditional type (distributed subset method discussed above), it is expected Such as realize frequency diversity gain for the mobile phone of the edge of the cell in base station.

The RRC signaling of the semi-static modes of ■, default option to be changed to as shown in Figure 9 using a resource block as granularity Continuous resource.Purpose is to realize frequency selective scheduling (so that according to the radio at this time between base station 5 and mobile phone 3 Different mobile phones 3 is dispatched on different frequency subbands by condition), and also process resource scatteredization the problem of. In this case, mobile phone 3 by by it is following it is different in a manner of explain that (certainly, base station 5 will change received DCI message It generates the mode of DCI message)：

The first field with the position ceil (log2K) is used for indicating selecting one point from K subregion of system bandwidth Area, wherein each portions of bandwidth includes the continuous resource blocks that resolution ratio is a RB.Example shown in Fig. 9 shows that number of partitions is equal to The specific condition of the quantity (P) of resource block in each resource block group.

It is used for indicating the displacement of resource allocation span in selected portions of bandwidth with 1 the second field.Place value 1 Indicate triggering displacement (Right Aligns) to the right, otherwise triggering displacement (left-justify) to the left.

Third field includes bitmap, the single RB in the difference selected portions of bandwidth of addressing of position in the bitmap, and And indicate whether the resource block distributes to mobile phone 3.The size of the field is as follows：

Option 2：Via dynamic signaling by Class1 resource allocation heavy duty be continuous RB levels resolution ratio.Above-mentioned choosing System bandwidth is only divided into the respective using a RB as K subregion of the continuous resource of granularity of lesser amt by item 1；And each point The initial position in area is fixed.It as shown in Figure 10 can be by only having in order to provide more flexibilities in initial position Dynamically profit following two fields for signaling it can further enhance resource allocation type 1：

HaveFirst field of position, for indicating the resource allocation at any position in system bandwidth Starting RB.

Second field includes bitmap, and the single RB in addressing resource allocation span is distinguished in the position of the bitmap, and indicates Whether the resource block distributes to mobile phone 3.The size of the field is as follows：

As another solution, new DCI format can be defined.For example, if providing new DCI format to Class1 distribution, The size of Class1 resource allocation can then be changed, to allow following more multi-option：

Option 3：The option is similar to above-mentioned option 1, but introduces an added field with following (instead of passing through RRC Signaling and) dynamically indicate traditional type 1 or new type 1.

It introduces with 1 the first field to indicate traditional type 1 or new type 1.

With ceil (log₂K) the second field of position is used for indicating selecting one point from K subregion of system bandwidth Area, wherein each portions of bandwidth includes the continuous RB that resolution ratio is a RB.

Third field includes bitmap, and the single RB in the selected portions of bandwidth of addressing is distinguished in the position of the bitmap, and Indicate whether the resource block distributes to mobile phone 3.The size of the field is as described below：

Option 4：The option is similar to above-mentioned option 2, but replaces reducing (according to the digit for identifying starting RB) and provide Source allocation span profit can signal initial position dynamically as follows：

HaveFirst field of position is used for indicating the resource allocation at any position in system bandwidth Originate RB.

Second field includes bitmap, and the single RB in addressing resource allocation span is distinguished in the position of the bitmap, and indicates Whether the resource block distributes to mobile phone 3.The size of the field is as described below：

There is provided new DCI format will also allow the supplemental information above described in solution 1 to be contained in utilization biography The distribution information that system DCI format is provided.The shortcomings that defining new DCI format is to cause each mobile phone 3 that may divide to find It is assigned to any control data of the mobile phone 3 and the number attempted of the blind decoding that must carry out increases.

Variation and alternative

The above has explained multiple embodiments.As it will be appreciated by those skilled in the art that can still benefit from here In the case of the invention embodied, several modifications and replacement are carried out to above-described embodiment.By way of illustration, will only it say now These bright multiple alternatives and variation.

In the above-described embodiments, the telecommunication system based on mobile phone using above-mentioned resource allocation techniques is illustrated System.As it will be appreciated by those skilled in the art that can be in any communication system using multiple resource blocks using for dispatching The technology of these communications resource used.It under normal circumstances, will be logical using what is communicated with multiple and different user apparatus Node is believed to replace base station.For example, although having used term cellular phone throughout the specification, the method and set The standby any subscriber device being equally applicable to such as personal digital assistant, notebook computer, web browser.

In the above-described embodiments, it is assumed that the bandwidth of operation of base station is 20MHz and each resource block includes that 12 or 24 sons carry Wave.As it will be appreciated by those skilled in the art that the present invention is not limited to the specific amount of bandwidth or resource block sizes or unlimited In the frequency interval of the subcarrier.

In some embodiments in the above-described embodiments, by higher level signaling or via broadcast channel come electric to movement The one or more predefined resource block subsets of 3 notice of words, supplemental information include to identify with reference to the predefined resource block subset The resource of ePDCCH.As it will be appreciated by those skilled in the art that alternatively, can be pre- by this from the initialisation of mobile phone Information is defined to be permanently stored in mobile phone.However, according to the universal local transmission characteristic in system bandwidth, due to pre- The resource block subset of definition ideally will be different for each base station 5, therefore this is not preferred.

In the above-described embodiments, multiple software modules are illustrated.As it will be appreciated by those skilled in the art that volume may be used It translates or non-compiled form provides software module, and can be supplied via computer network using these software modules as signal To base station or mobile phone or these software modules being supplied to the recording medium of CD-ROM etc..In addition, Part or all of function of being carried out of the software can be carried out using one or more special hardware circuits.However, excellent Choosing uses software module, this is because the update of base station 5 and mobile phone 3 is convenient for, to update their function.This Outside, above-mentioned module can not be defined as separation module, but can be built in the operation system of base station and/or mobile phone System.

Various other variations will be apparent to those skilled in the art, and here without into one Step is described in detail.

Following detailed description can be in the way of the 3GPP standard implementation present invention currently proposed.Although by various feature descriptions To be necessary or necessary, but for example by other requirements that the 3GPP standards proposed are applied, thus this may only be directed to The case where standard.Therefore, these statements are not construed as limiting the invention in any way.

1Introduction

In principle, for frequency selective scheduling, the CSI that is reported based on UE is directed to both PDSCH and ePDCCH UE is distributed to some resource blocks in its best resource block (RB).This means that will be at least for localization distribution with UE spies Some modes distribute the regions ePDCCH, so that retain the regions ePDCCH of different UE in the different location of system bandwidth. In addition, having arranged not allowing the multiplexing of the PDSCH and ePDCCH in PRB pair in RAN1#68.Therefore, in order to efficiently Using these resources, any not used PRB in the regions ePDCCH should be reused for PDSCH transmission.

However, there is a problem of related with Current resource allocation plan.First, it is applied by PDSCH resource allocation types 0 In the quantity of UE and the occupied RB of ePDCCH be less than system bandwidth RBG sizes in the case of, in the RBG without point Remaining RB of dispensing ePDCCH is not used to the PDSCH of same UE, to produce loophole or scattered resource in systems.

Secondly, it about PDSCH resource allocation types 2, is authorized UE to be distributed to the DL to continuous P B and for same UE In the case of authorizing the ePDCCH of the two to be located in these continuous RB (that is, PDSCH is Chong Die with practical ePDCCH resources) with UL, And if UE can not detect that UL is authorized, this will cause, and UE cannot be decoded PDSCH and DL harq buffers device is damaged It is bad.

Third, especially for frequency selective scheduling, if filling different UE's using resource allocation type 1 Loophole caused by ePDCCH, then due to can only distribute PDSCH to the distribution for adding unnecessary scheduling limitation to system The subset of formula RBG, therefore scattered resource can not be handled.

In RAN1#69, these problems [2-4] are also discussed in some other documents.

With resource scatteredization and how to be reused unused in the regions ePDCCH additionally it is believed that above-described The related problem of PRB pair is mainly associated with the following situations indicated for ePDCCH PRB pairs：

The dynamic ePDCCH PRB pairs instruction with implicit signaling based on CSI report：EPDCCH is directed to due to each UE The optimal sub-band of distribution is likely located in the different sub-band in system bandwidth, therefore will generate scattered resource for PDSCH transmission And prevent big distribution.

For the RRC signaling of ePDCCH PRB pairs instruction：If ePDCCH area distributions are in system bandwidth, in system In will also generate scattered resource and prevent the big distribution for PDSCH transmission.

In the version -11 for signaling via PDCCH or ePCFICH etc. using clear and dynamic ePDCCH PRB indicate solution it is other in the case of, problem discussed above will not occur.Due in each subframe, eNB can be with Using existing resource distribution type come except ePDCCH transmit used in RRB dispatched on any PRB pair in addition to PDSCH, And since UE knows that the PRB pair for being currently used in ePDCCH transmission can be jumped in the case where being decoded to PDSCH Both cross.

Situation a), b) and the details of other situations [5] is illustrated in subsidiary document.

Therefore, in the publication, provide and how in terms of Resource Allocation Formula to provide more flexibilities to eNB schedulers Some solutions, so that in the case of the dynamic ePDCCH PRB pairs instruction with implicit signaling, based on being directed to EPDCCH PRB pairs instruction CSI report and RRC signaling, can be directed to same UE or difference UE efficiently utilize scattered resource with Any not used ePDCCH resources.

2Enhanced PDSCH resource allocation types 0 and 2

The enhanced PDSCH resource allocations of type 0：In traditional PDSCH resource allocations of type 0, resource block distribution letter Breath includes indicating distribution to the bitmap of the resource block group (RBG) of scheduled UE.If the corresponding bit value in bitmap is 1, to UE distributes RBG；Otherwise RBG is not distributed to UE.However, for UE use patterns 0 Chong Die with ePDCCH PDSCH and In the case that the quantity of the occupied RB of ePDCCH is less than the RBG sizes of system bandwidth, it is not allocated to ePDCCH's in RBG Remaining RB may be not used to the PDSCH of same UE, and which produces scattered resources.Figure 11 shows to be directed to same UE and other UE Chong Die with the regions ePDCCH PDSCH distribution example.It is enhanced PDSCH moneys for possible solution for the problem Source distribution type 0, wherein in the PDSCH resource allocation types 0, eNB signals supplemental information profit to UE, to indicate Which VRB should be excluded (since these VRB are transmitted comprising ePDCCH) from PDSCH resource allocation types 0.Then, UE should Supplemental information is combined with its PDSCH resource allocation type 0, to obtain its practical resource allocation.In this case, PDSCH Enhanced resource allocation type 0 includes two parts.Partly -1 indicate RBG ranks using traditional PDSCH resource allocation types 0 Discontinuous resource allocation.The partly supplemental information of -2 bitmaps comprising a VRB in gathering as selected RBG.Portion The selected RBG set for dividing -2 is by making the RBG overlappings in the regions RBG and ePDCCH represented by part -1 be formed by. By MSB~LSB of the bitmap of part -2 by the increased Sequential Mapping of frequency to VRB.If the corresponding bit value in bitmap field is 1, then it is directed to given UE and distributes VRB to PDSCH；Otherwise it is directed to same UE or difference UE, VRB is distributed to ePDCCH. The regions ePDCCH are can to transmit ePDCCH and for the set of the UE PRB pairs that can be dynamically or semi-statically configured.

The enhanced PDSCH resource allocations of type 2：Traditional 2 field of PDSCH resource allocation types includes and starting resource block (RB_start) corresponding resource indicated value (RIV) and continuous dispensing resource block length L_CRB.However, being provided for PDSCH Source distribution type 2, has the following problems：UE is being distributed for continuous VRB and is being assigned with for same in these continuous VRB In the case that the DL of UE authorizes the ePDCCH for authorizing the two with UL and if UE can not detect that UL is authorized, this will cause UE cannot be decoded PDSCH and DL harq buffer devices is caused to be destroyed.It is contemplated that solution party similar with type 0 Case, in the solution, eNB signals supplemental information profit to UE indicate should be by which VRB (due to these VRB Including ePDCCH is transmitted) it is excluded from PDSCH resource allocation types 2.Then, UE divides the supplemental information and its PDSCH resource It is combined with type 2 to obtain its practical resource allocation.There are two parts for the enhanced tool of PDSCH resource allocation types 2.Partly -1 makes With traditional resource distribution type 2, and part -2 includes the institute Chong Die with the PDSCH partly represented by -1 as the regions ePDCCH The supplemental information of the RBG set of selection.Figure 12 shows the example of this method.Partly -2 be selected RBG set bitmap side Case, in the bit map schemes, the position of bitmap indicates a VRB in selected RBG set respectively, so that by bitmap MSB~LSB is by the increased Sequential Mapping of frequency to VRB.It, will for given UE if the corresponding bit value in bitmap field is 1 VRB is distributed to PDSCH；Otherwise it is directed to same UE or difference UE, VRB is distributed to ePDCCH.The regions ePDCCH are can to transmit EPDCCH and the set for being directed to the PRB pair that UE can be configured dynamically or semi-statically.

The position of supplemental information (that is, part -2) and digit：It is signaled to UE with by -2 profits of part there are following Related different options：

Option -1：EPDCCH DCI formats：For both type 0 and type 2, in the feelings configured to ePDCCH Under condition, the distinctive modes of UE may be used to make part -2 be set to DCI format, the part as Resource Allocation Formula. The quantitative aspects of VRB, digit should be less than or equal to the regions ePDCCH size.For example, the part -2 for 10MHz bandwidth can To be one of { 2,4,8 }.If the quantity of supplemental information position is equal to the quantity of the VRB in the regions ePDCCH, Any PDSCH resource allocations can be carried out in the case where being limited without any scheduling.However, if the quantity of supplemental information position is small The quantity of VRB in the regions ePDCCH, then scheduler must to PDSCH distribute carry out some limitation so that PDSCH resources and Overlapping between the regions ePDCCH is confined to the quantity for the supplemental information position that system bandwidth is supported.

Option 2：EPCFICH or new DCI formats：It can be in ePCFICH (in the case of agreement) or in new DCI lattice Signal notification section -2 are dynamically utilized in formula, and this is common for the group of all UE or UE.Supplemental information (portion Divide -2) it will dynamically indicate that the ePDCCH by all UE is actually accounted in the set for the pre-assigned VRB in the regions ePDCCH VRB.In this case, the size of part -2 is by the size equal to the regions ePDCCH in terms of quantity VRB, such as { 8 Position, 12,16 }.The regions ePDCCH are advanced for (that is, semi-statically) to UE via RRC signaling.

3Enhanced resource allocation type 1

Traditional PDSCH resource allocation types 1：As shown in Figure 13 a or 13b, traditional PDSCH resource allocation types 1 to one VRB applies 1, wherein applicable VRB is the subset of the RBG selected in system bandwidth in a distributed fashion (that is, system band The sub-sampling of RBG in width).PDSCH resource allocation types 1 can not handle the continuous VRB of more than one RBG (that is, can only locate Virtual reality B is managed to realize frequency diversity gain), thus the application of frequency selective scheduling is very limited.In detail, respectively such as Shown in Figure 13 a and 13b, PDSCH resource allocation types 1 have following field [1]：

Using with ceil (log₂P) a the first field indicates the selected RBG subsets in RBG subsets.

The displacement of the resource allocation span in subset is indicated using the second field with 1 position.Place value 1 indicate to Right triggering shifts (Right Aligns).Otherwise, triggering displacement (left-justify) to the left.

Third field includes bitmap, the single VRB in the position difference selected RBG subsets of addressing of the bitmap.The word The size of section is as described below：

Enhanced PDSCH resource allocation types 1：Overcome and surrounds ePDCCH channel distributions PDSCH's as any UE As a result possible mode the problem of caused resource scatteredization is that have that continuous and discrete resource point can be coped with With the two and can be applied to frequency selective scheduling the finer resource allocation mechanism of VRB granularities (that is, one VRB points Resolution).This can pass through realization of such as getting off：Without by the size of signal position relative to traditional PDSCH resource allocation types 1 In the case that the size of information bit changes, modification PDSCH resource allocation types 1 are to cover the resolution ratio of continuous VRB ranks.

■ gives tacit consent to：For example, for high mobility UE or cell edge UE, work as forward pass be intended to realize frequency diversity gain 1 identical distribution subset RBG (that is, sub-sampling) of system PDSCH resource allocation types.

■ it is as shown in figure 14, changing default allocation to cover the use for the continuous resource that resolution ratio is a VRB The RRC signaling of semi-static mode.Purpose is the problem of realizing frequency selective scheduling and also process resource scatteredization.It can be by According to the field for reusing existing traditional type 1 in different ways as follows：

Using with ceil (log₂P) a the first field indicates to select one from P subregion of system bandwidth A subregion, wherein each portions of bandwidth includes the continuous RB that resolution ratio is a RB.

The shifting of the resource allocation span in selected bandwidth subregion is indicated using the second field with 1 position Position.Place value 1 indicates triggering displacement (Right Aligns) to the right, otherwise triggering displacement (left-justify) to the left.

Third field includes bitmap, the single VRB in the position difference selected portions of bandwidth of addressing of the bitmap.The word Section size be：

4 conclusions

In the publication, it discusses to provide the solution of more flexibilities to eNB schedulers in terms of Resource Allocation Formula Certainly scheme, so that can efficiently utilize scattered resource for identical UE or difference UE.

Propose：If having arranged following situations for the instruction of ePDCCH PRB pairs, consider to cope with scattered resource The enhanced PDSCH Resource Allocation Formulas for version 11 of problem：

A) the dynamic ePDCCH PRB pairs instruction with implicit signaling based on CSI report

B) it is directed to the RRC signaling of ePDCCH PRB pairs instruction

Various other variations will be apparent to those skilled in the art, and here without into one Step is described in detail.

The application based on and require the priority of the UK Patent Application 1213794.9 that August in 2012 submits on the 2nd, herein It includes all its contents by reference.

Claims (39)

1. a kind of communication node, for being communicated with user apparatus via wireless interface, the communication node includes：

A series of transceiver circuit, for carrying out sending and receiving for signal with the user apparatus using subframes, wherein respectively Subframe includes multiple communication resource blocks, and each resource block corresponds in system bandwidth for the communication node and the user apparatus The subband communicated, and each resource block has control section for carrying the first control data and for carrying number of users According to data portion；And

Resource distribution module is configured as resource block of the distribution for being communicated with the user apparatus in subframe,

Wherein, the resource distribution module is configured as：

I) generate the first resource distribution data sent to the user apparatus, first resource distribution data distribution for More than first a resource blocks of the user apparatus communicating user data；

Ii at least one resource block) is distributed, to be carried for the user in the data portion of at least one resource block Second control data of device, at least one resource block be included in that first resource distribution data are distributed described the More than one in a resource block；And

Iii the Secondary resource distribution data sent to the user apparatus) are generated, the user apparatus can use described second Resource allocation data is described for carrying to be excluded from more than first a resource blocks that first resource distribution data are distributed At least one resource block of second control data.

2. communication node according to claim 1, wherein the Secondary resource distribution data are distributed with the first resource Data identify at least one resource block for carrying the second control data combinedly.

3. communication node according to claim 1, wherein the Secondary resource distribution data are distributed with the first resource More than first a resource blocks that data are distributed relatively are identified for carrying the described at least one of the second control data Resource block.

4. communication node according to any one of claim 1 to 3, wherein

Multiple resource blocks of subframe configure in a series of resource block groups, and

The first resource distribution data distribute the resource in one or more resource block groups selected in the resource block group Block.

5. communication node according to claim 4, wherein the Secondary resource distribution data include bitmap, the bitmap Interior position is corresponding with the resource block in selected one or more resource block groups and identifies for carrying second control At least one resource block of data processed.

6. communication node according to any one of claim 1 to 3, wherein the first resource distribution data are configured Ingredient is with continuous resource block group as more than described first a resource blocks.

7. communication node according to any one of claim 1 to 3, wherein first resource distribution data include with At least one of lower data：

I) it is used to identify the bitmap of a resource block more than distributed first；And

Ii) the data of multiple resource blocks from the starting resource block for identifying starting resource block and being distributed.

8. communication node according to any one of claim 1 to 3, wherein

At least one resource block is dispensed in known resource block subset, and

The Secondary resource distributes known resource block subset described in data reference to identify at least one resource block.

9. communication node according to claim 8, wherein further include sending component,

The component that sends will be used to identify that the third control data of the known resource block subset are sent to the user apparatus.

10. communication node according to claim 9, wherein the transmission component is configured as sending out in the communication node It send and sends the third control data before subframe.

11. communication node according to claim 9, wherein the transmission component is configured as in subframe described in transmission Third controls data.

12. communication node according to claim 8, wherein the known resource block subset be configured as according to subframe and Change.

13. communication node according to any one of claim 1 to 3, wherein

At least one resource block is dispensed in one of multiple predefined resource block subsets, and

The Secondary resource distribution Data Identification includes the described second one or more predefined resource block for controlling data Subset, to be excluded from more than first a resource blocks that first resource distribution data are distributed.

14. communication node according to claim 13, wherein

Each predefined resource block subset has associated index value, and

The second control Data Identification and predefined resource block of the one or more comprising the second control data Collect associated index value.

15. communication node according to any one of claim 1 to 3, wherein the communication node is configured to： It is communicated with multiple user apparatus using resource block, and the second control data is sent respectively to each user apparatus.

16. communication node according to any one of claim 1 to 3, wherein the communication node is configured to： It is communicated with multiple user apparatus using resource block, and broadcast the second control data is concentrated to all user apparatus.

17. communication node according to claim 15, wherein different the second control data are sent to each user Device.

18. communication node according to claim 17, wherein the resource distribution module is configured to：

It is generated respectively for the first resource distribution data of first user device and for described the of second user device One resource allocation data distributes data and for described in second user device for the first resource of first user device First resource distributes data definition for the resource block of first user device distribution and is directed to the second user device The resource block of distribution has overlapping, and

Different the second control data are generated for the first user device and the second user device, so that each use Family device excludes resource block to eliminate the overlapping.

19. communication node according to any one of claim 1 to 3, wherein first resource distribution data and described Secondary resource distribution data are sent in enhanced physical downlink control channel, that is, ePDCCH.

20. communication node according to any one of claim 1 to 3, wherein the resource distribution module is configured to Enough first resources generated for distributing virtual resource blocks distribute data.

21. a kind of user apparatus, for being communicated with communication node, the user apparatus includes：

A series of transceiver circuit, for carrying out sending and receiving for signal with the communication node using subframes, wherein respectively Subframe includes multiple communication resource blocks, and each resource block is corresponding with the subband of the system bandwidth of the communication node, and respectively provides Source block has the control section for carrying the first control data and the data portion for carrying user data；And

Communication control module is configured as：

I) receive first resource and distribute data, first resource distribution data distribution for the communication node communication user A resource block more than the first of data；

Ii at least one resource block) is received, carries in the data portion of at least one resource block and is filled for the user The the second control data set, at least one resource block are included in described first that the first resource distribution data are distributed In multiple resource blocks；

Iii Secondary resource distribution related with for carrying at least one resource block of the second control data) is received Data；And

Iv it) is excluded from more than first a resource blocks that first resource distribution data are distributed for carrying second control At least one resource block of data.

22. user apparatus according to claim 21, wherein the communication control module is configured as：With described first Resource allocation data uses the Secondary resource distribution data combinedly, with identification for carrying the second control data At least one resource block.

23. user apparatus according to claim 21, wherein the Secondary resource distribution data and the first resource point It is relatively controlled at least one described in data to identify for carrying described second with more than first a resource blocks that data are distributed A resource block.

24. the user apparatus according to any one of claim 21 to 23, wherein

Multiple resource blocks of subframe configure in a series of resource block groups, and

The first resource distribution data distribute the resource in one or more resource block groups selected in the resource block group Block.

25. user apparatus according to claim 24, wherein the Secondary resource distribution data include bitmap, institute's rheme Position in figure is corresponding with the resource block in selected one or more resource block groups and identifies for carrying described second Control at least one resource block of data.

26. the user apparatus according to any one of claim 21 to 23, wherein first resource distribution data by with The continuous resource block group of distribution is set to as more than described first a resource blocks.

27. the user apparatus according to any one of claim 21 to 23, wherein the first resource distributes data and includes At least one of following data：

I) it is used to identify the bitmap of a resource block more than distributed first；And

Ii) the data of multiple resource blocks from the starting resource block for identifying starting resource block and being distributed.

28. the user apparatus according to any one of claim 21 to 23, wherein

At least one resource block is dispensed in predefined resource block subset, and

Resource block subset is predefined to identify at least one resource block described in the Secondary resource distribution data reference.

29. user apparatus according to claim 28, wherein further include receiving part,

The receiving part receives the third for identifying the predefined resource block subset and controls data.

30. user apparatus according to claim 29, wherein the receiving part is configured as connecing in the user apparatus The third control data are received before receiving subframe.

31. user apparatus according to claim 29, wherein the receiving part is configured as in subframe described in reception Third controls data.

32. user apparatus according to claim 28, wherein the predefined resource block subset is configured as according to subframe And change.

33. the user apparatus according to any one of claim 21 to 23, wherein

At least one resource block is dispensed in one of multiple predefined resource block subsets,

The Secondary resource distribution Data Identification includes the described second one or more predefined resource block for controlling data Subset, and

The communication control module is configured as, and institute is excluded from multiple resource blocks that first resource distribution data are distributed Resource block in the predefined resource block subset of mark.

34. user apparatus according to claim 33, wherein

Each predefined resource block subset has associated index value, and

The second control Data Identification and predefined resource block of the one or more comprising the second control data Collect associated index value.

35. the user apparatus according to any one of claim 21 to 23, wherein the first resource distribution data and institute Secondary resource distribution data are stated to send in enhanced physical downlink control channel i.e. ePDCCH.

36. a kind of method carried out in communication node, the communication node are communicated via wireless interface with user apparatus, institute The method of stating includes the following steps：

Sending and receiving for signal is carried out with the user apparatus using a series of subframes, wherein each subframe includes multiple communications Resource block, each resource block correspond to the subband communicated with the user apparatus for the communication node in system bandwidth, And each resource block has the control section for carrying the first control data and the data portion for carrying user data；With And

Allocation step, for distributing the resource block for being communicated with the user apparatus in subframe,

Wherein, the allocation step includes：

I) generate the first resource distribution data sent to the user apparatus, first resource distribution data distribution for More than first a resource blocks of the user apparatus communicating user data；

Ii at least one resource block) is distributed, to be carried for the user in the data portion of at least one resource block Second control data of device, at least one resource block be included in that first resource distribution data are distributed described the More than one in a resource block；And

Iii the Secondary resource distribution data sent to the user apparatus) are generated, the user apparatus can use described second Resource allocation data is described for carrying to be excluded from more than first a resource blocks that first resource distribution data are distributed At least one resource block of second control data.

37. according to the method for claim 36, wherein the method is by according to described in any one of claim 1 to 20 Communication node carry out.

38. a kind of method that user apparatus is carried out, the user apparatus are communicated with communication node, the method includes with Lower step：

Sending and receiving for signal is carried out with the communication node using a series of subframes, wherein each subframe includes multiple communications Resource block, each resource block correspond to the subband communicated with the communication node for the user apparatus in system bandwidth, And each resource block has the control section for carrying the first control data and the data portion for carrying user data；With And

Communication control step comprising：

I) receive first resource and distribute data, first resource distribution data distribution for the communication node communication user A resource block more than the first of data；

Ii at least one resource block) is received, carries in the data portion of at least one resource block and is filled for the user The the second control data set, at least one resource block are included in described first that the first resource distribution data are distributed In multiple resource blocks；

Iii Secondary resource distribution related with for carrying at least one resource block of the second control data) is received Data；And

Iv it) is excluded from more than first a resource blocks that first resource distribution data are distributed for carrying second control At least one resource block of data.

39. according to the method for claim 38, wherein the method is by according to described in any one of claim 21 to 35 User apparatus carry out.