CN103391550A - Method for achieving backhaul link downlink transmission, LS wireless device and base station - Google Patents
Method for achieving backhaul link downlink transmission, LS wireless device and base station Download PDFInfo
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Abstract
The invention relates to a method for achieving backhaul link downlink transmission, an LS wireless device and a base station. The method comprises the steps that the LS wireless device receives an LS-PCFICH sent by the base station on any one OFDM symbol or a plurality of OFDM symbols except for the first OFDM symbol of backhaul subframes or on new carrier waves distributed by the base station, the LS-PCFICH is used for dynamically indicating the initial position of downlink transmission data of the current subframe or the next subframe on a backhaul link of the LS wireless device, and the LS wireless device begins to receive the downlink transmission data from the received initial position indicated by the LS-PCFICH. According to the method for achieving the backhaul link downlink transmission, the LS wireless device and the base station, the LS wireless device can accurately receive the downlink transmission data.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of back haul link downlink transfer implementation method, local service (LS, Local Server) wireless device and base station.
Background technology
Development along with Mobile Communication Service and technology, the bandwidth demand that mobile communication system evolution brings continues to increase, it is more and more crowded that bandwidth becomes, because the frequency spectrum resource that can be used for mobile communication is very limited, so the bandwidth that can be assigned to can not meet the demand of real system.For reduce that bandwidth provides and bandwidth demand between difference, the bandwidth that more effective utilization distributes just becomes very important.
For improving wireless frequency spectrum efficiency and better supporting these two primary demands of emerging localized business, we have introduced a kind of local service (LS, Local Server) scheme simultaneously.In the communication network with LS wireless device, user (L-UE) and the link between the LS wireless device that the LS wireless device participates in service are called as access link (Access Link), link between LS wireless device and macro cell base station (Macro eNB) is called as back haul link (Backhaul Link), macro cell base station participates in the user (macrocell UE, macro UE) of service and the link between base station is called as the link that direct transfers (Direct Link).As shown in Figure 1.By dispose the LS wireless device in the Cellular Networks residential quarter, can serve enhancing to regional area in residential quarter, and with the service of extremely low cost realization towards this locality.In addition, can also continue to use structure and the design of existing heterogeneous network (Hetnet, heterogeneous network), reduce interference, optimizing power consumption, guarantee systematic function and backward compatibility comprehensively, and fully excavate the advantage of localised transmission.Because the LS wireless device possesses the back haul link of eating dishes without rice or wine (backhaul link), therefore have powerful flexibility and low cost, and for different application scenarioss, backhaul link can optionally support chain of command, user's face or even can not have backhaul link link.In addition, Local server compares with the LTE-Direct isotype, is easier to realize the monitoring of operator to network.
After the LS technology is introduced the LTE/LTE-A communication system, because there is the transmitting-receiving self-interference in the LS wireless device, receipts/(or send out/receive) of protecting interval to be used for it need to be set switches, this protection interval will certainly take some OFDM (Orthogonal Frequency Division Multiplexing, OFDM) symbol of backhaul subframe; Perhaps be carried on PDSCH when the physical down control information of LS, when LS does not receive base station sends on front several OFDM symbols PDCCH, therefore cause the LS wireless device can't know the symbolic number that the PDCCH of base station specifically takies; Thereby cause the LS wireless device can't correctly receive downlink transmission data, wherein, described downlink transmission data had both comprised Physical Downlink Control Channel (the Physical Downlink Control Channel of LS wireless device, PDCCH) data of transmission comprise again the data of Physical Downlink Shared Channel (Physical Downlink Shared Channel, the PDSCH) transmission of LS wireless device.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of back haul link downlink transfer implementation method, local service (LS, Local Server) wireless device and base station, so that the LS wireless device correctly receives downlink transmission data.
For solving aforementioned technical problem, the invention provides a kind of back haul link downlink transfer implementation method, the method comprises:
Local service (LS) wireless device is in the upper of any one or a plurality of OFDM symbols except the 1st OFDM symbol of backhaul (backhaul) subframe or be the Physical Control Format Indicator Channel (LS-PCFICH) that receives the local service wireless device special use that base station sends on the new carrier wave of its distribution in base station, and this LS-PCFICH is in order to the original position of dynamic indication LS wireless device downlink transmission data of current subframe or next subframe on back haul link;
Described LS wireless device starts to receive downlink transmission data from the original position that the described LS-PCFICH that receives indicates.
For solving aforementioned technical problem, the present invention also provides a kind of back haul link downlink transfer implementation method, and the method comprises:
Base station is to send the Physical Control Format Indicator Channel (LS-PCFICH) of local service wireless device special use on the new carrier wave that distributes of local service (LS) wireless device to described LS wireless device in the upper of any one or a plurality of OFDM symbols except the 1st OFDM symbol of backhaul (backhaul) subframe or at it, and this LS-PCFICH is in order to the original position of dynamic indication LS wireless device downlink transmission data of current subframe or next subframe on back haul link;
Described base station starts to be sent in to described LS wireless device the downlink transmission data of current subframe on back haul link or next subframe from the original position of described LS-PCFICH indication.
Further, the running time-frequency resource that takies of described LS-PCFICH be following any:
On any one the OFDM symbol that is mapped on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or,
On any two or more OFDM symbols that are mapped to alternately on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or,
Respective base station utilize high-level signaling for pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain on other OFDM symbol except front 3 OFDM symbols of the 1st time slot, or on all OFDM symbols of the 2nd time slot, perhaps on all the OFDM symbols except front 3 OFDM symbols; Or,
Respective base station is the new carrier wave of its distribution, wherein, is being mapped on time domain on the 1st OFDM symbol, be mapped on frequency domain 1 or a plurality of Resource Unit (RE) on; Or,
Respective base station for the new carrier wave of its distribution and base station be pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain this 1 or the 1st time slot of a plurality of RB/RB pair or the 2nd time slot or two time slots on.
For solving aforementioned technical problem, the invention provides a kind of local service (LS) wireless device, this equipment comprises:
The indicating channel information receiving module, be used in the upper of any one or a plurality of OFDM symbols except the 1st OFDM symbol of backhaul (backhaul) subframe or be the Physical Control Format Indicator Channel (LS-PCFICH) of the local service wireless device special use of reception base station transmission on the new carrier wave of its distribution in base station, this LS-PCFICH is in order to the original position of dynamic indication LS wireless device downlink transmission data of current subframe or next subframe on back haul link;
The transmission of data receiver module, be used for starting to receive downlink transmission data from the original position that the LS-PCFICH that receives indicates.
For solving aforementioned technical problem, the invention provides a kind of local service base station, this base station comprises:
The indicating channel information sending module, be used for the upper of any one or a plurality of OFDM symbols except the 1st OFDM symbol of backhaul (backhaul) subframe or its be on the new carrier wave of local service (LS) wireless device distribution to the Physical Control Format Indicator Channel (LS-PCFICH) of LS wireless device transmission local service wireless device special use, this LS-PCFICH is in order to the original position of dynamic indication LS wireless device downlink transmission data of current subframe or next subframe on back haul link;
The downlink transmission data sending module, be used for starting to be sent in to described LS wireless device from the original position of described LS-PCFICH indication the downlink transmission data of current subframe on back haul link or next subframe.
In sum, method of the present invention, subscriber equipment and base station, can be applicable to well LS, cellular communication communicate by letter with the LS Physical Downlink Control Channel of LS and the notice problem of Physical Downlink Shared Channel while coexisting have been solved, avoided the interference between cellular communication and LS communication, both guarantee communication efficiency and reliability, and made the LS wireless device can correctly receive downlink transmission data, also improved the resource utilization of system simultaneously.
Description of drawings
Fig. 1 is the schematic diagram based on the LS network of Cellular Networks;
Fig. 2 is the schematic diagram of back haul link downlink transfer implementation method of the present invention;
Fig. 3 is another schematic diagram of back haul link downlink transfer implementation method of the present invention;
Fig. 4 is LTE/LTE-A frame structure schematic diagram;
Fig. 5 is Resource Block and the subcarrier schematic diagram of LTE/LTE-A;
Fig. 6 is the schematic diagram of the mapping mode 1 of LS-PCFICH of the present invention;
Fig. 7 is another schematic diagram of the mapping mode 1 of LS-PCFICH of the present invention;
Fig. 8 is the schematic diagram of the mapping mode 2 of LS-PCFICH of the present invention;
Fig. 9 is another schematic diagram of the mapping mode 2 of LS-PCFICH of the present invention;
Figure 10 is another schematic diagram of the mapping mode 2 of LS-PCFICH of the present invention;
Figure 11 is the schematic diagram of the mapping mode 3 of LS-PCFICH of the present invention;
Figure 12 is another schematic diagram of the mapping mode 3 of LS-PCFICH of the present invention;
Figure 13 is the modular structure schematic diagram of local service of the present invention (LS) wireless device;
Figure 14 is the modular structure schematic diagram of base station of the present invention.
Embodiment
As shown in Figure 2, back haul link downlink transfer implementation method of the present invention comprises the following steps:
Step 201: local service (LS) wireless device is in the upper of any one or a plurality of OFDM symbols except the 1st OFDM symbol of backhaul (backhaul) subframe or be Physical Control Format Indicator Channel (the LS Physical Control Format Indicator Channel that receives the local service wireless device special use that base station sends on the new carrier wave of its distribution in base station, LS-PCFICH), this LS-PCFICH is in order to the original position of dynamic indication LS wireless device downlink transmission data of current subframe or next subframe on back haul link;
Step 202: described LS wireless device starts to receive downlink transmission data from the original position that the described LS-PCFICH that receives indicates.
Method shown in Figure 2 is to describe from the angle of LS wireless device side operation, and the present invention program also can describe from the angle of the operation of base station side, and particularly, as shown in Figure 3, the method comprises:
Step 301: base station is to send the Physical Control Format Indicator Channel (LS-PCFICH) of local service wireless device special use on the new carrier wave that distributes of local service (LS) wireless device to described LS wireless device in the upper of any one or a plurality of OFDM symbols except the 1st OFDM symbol of backhaul (backhaul) subframe or at it, and this LS-PCFICH is in order to the original position of dynamic indication LS wireless device downlink transmission data of current subframe or next subframe on back haul link;
Step 302: described base station starts to be sent in to described LS wireless device the downlink transmission data of current subframe on back haul link or next subframe from the original position of described LS-PCFICH indication.
Particularly, the running time-frequency resource that takies of described LS-PCFICH be following any:
On any one the OFDM symbol that is mapped on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or,
On any two or more OFDM symbols that are mapped to alternately on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or,
Respective base station utilizes high-level signaling to be pre-configured one or more Physical Resource Block (the Resource Block of LS wireless device, RB) or Physical Resource Block to (RB pair), be mapped on time domain on other OFDM symbol except front 3 OFDM symbols of the 1st time slot, or on all OFDM symbols of the 2nd time slot, perhaps on all the OFDM symbols except front 3 OFDM symbols; Or,
Respective base station is the new carrier wave of its distribution, wherein, is being mapped on time domain on the 1st OFDM symbol, be mapped on frequency domain 1 or a plurality of Resource Unit (Resource Element, RE) on; Or,
Respective base station for the new carrier wave of its distribution and base station be pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain this 1 or the 1st time slot of a plurality of RB/RB pair or the 2nd time slot or two time slots on.
Base station utilizes the pre-configured RB/RB pair of high-level signaling to be equivalent to indicate the mapping position of LS-PCFICH on frequency domain, position on time domain (as the 2nd OFDM symbol of the 1st time slot) do not have the different of essence from LS-PCFICH for it, its difference only is that the former is semi-static running time-frequency resource indication information, and the latter is the static running time-frequency resource indication information of system configuration.Both all can make base station and wireless device this LS-PCFICH of sending/receiving on this specific running time-frequency resource.
Understandably, the shared running time-frequency resource of this LS-PCIFICH does not conflict as prerequisite take the position with existing PCIFICH.
The invention solves cellular communication communicates by letter while coexisting with LS, the problem of the original position of its downlink transfer of LS wireless device how to confirm on time domain, avoid the interference between cellular communication and LS communication, both guaranteed communication efficiency and reliability, also improved the resource utilization of system simultaneously.
Long Term Evolution (Long Term Evolution, LTE) system, senior Long Term Evolution (LTE-Advanced, LTE-A) system and IMT-Advanced (International Mobile Telecommunication Advanced, IMT-Advanced) system is all with OFDM (Orthogonal Frequency Division Multiplexing, OFDM) technology is basis, and ofdm system is the data mode of time-frequency bidimensional.The radio frames of a 10ms (frame) is comprised of 10 subframes, 1 subframe (subframe) is comprised of 2 time slots (slot), during normal cyclic prefix (Normal Cyclic Prefix, Normal CP), each slot is comprised of 7 OFDM symbols; During expansion CP (Extended CP), each slot is comprised of 6 OFDM symbols, as shown in Figure 5.Wherein, a Resource Block (Resource Block, RB) is by 12 or 24 subcarriers continuous on frequency domain, and on time domain, all the OFDM symbols in continuous 1 time slot form; Resource Block is to (Resource Block pair, RB pair) by 12 or 24 subcarriers continuous on frequency domain, and on time domain, all the OFDM symbols in continuous 1 subframe form.Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) takies front 1 or 2 or 3 or 4 OFDM symbol of 1 subframe on time domain, take the whole system bandwidth on frequency domain; Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) take all remaining OFDM symbols except the OFDM symbol that PDCCH takies in 1 subframe on time domain, take several RB on frequency domain, as shown in Figure 5.After receiving terminal reception PDCCH obtains control information, according to the Downlink Control Information demodulation PDSCH that obtains.
After introducing LS in existing LTE/LTE-A system, base station equally need to be for LS sends Downlink Control Information on backhaul link, and LS is according to the corresponding PDSCH of Downlink Control Information demodulation that obtains.This Downlink Control Information can be mapped on front 1 to 3 or front 2 to 4 OFDM symbols of subframe as the PDCCH in LTE/LTE-A, also can be mapped on the running time-frequency resource at PDSCH place.
In each subframe, it is Physical Control Format Indicator Channel (LS Physical Control Format Indicator Channel by the special use of local service wireless device that the downlink transmission data of LS wireless device on back haul link specifically taken several OFDM symbols, LS-PCFICH) control format of 2 bits of upper carrying indication (Control Format Indicator, CFI) information is informed UE's.Wherein, the concrete value of the CFI of 2 bits is 1,2 and 3, represents that respectively downlink transmission data has taken front 1,2 and 3 OFDM symbol of the 1st time slot of subframe, and the situation of CFI=4 be retained need not.Concrete:
When descending system bandwidth
The time, the number of the OFDM symbol that downlink transmission data can take is 1,2 or 3, i.e. CFI;
When descending system bandwidth
The time, the number of the OFDM symbol that downlink transmission data can take is 2,3 or 4, i.e. CFI+ 1.
In the LTE/LTE-A system, the original CFI of 2 bits carries out the piece coding of (32,2), then modulate, adopt the modulation system of quarternary phase-shift keying (QPSK) (Quaternary Phase Shift Keying, QPSK), finally obtain 16 modulation symbols, i.e. 16 RE.
Above-mentioned 16 RE are after layer mapping and precoding, to be combined into one group (be that PCFICH is altogether by 4 REG (Resource Element Group to every 4 RE in order, resource unit group) form, be designated as REG0～REG3) and according to certain rule be mapped on the physics running time-frequency resource.Specific rules is as follows:
On time domain, described 4 REG are positioned on the 1st the OFDM symbol of the 1st time slot of subframe.
On frequency domain, the position of described 4 REG is obtained by following 4 formula:
REG0 be mapped to
On continuous 4 RE for original position;
REG1 be mapped to
On continuous 4 RE for original position;
REG2 be mapped to
On continuous 4 RE for original position;
REG3 be mapped to
On continuous 4 RE for original position.
The k value of directly calculating from above-mentioned 4 formula, need to carry out again
After can obtain final k value.
For the quantity of system descending Resource Block,
For the quantity of Resource Block sub-carriers,
For cell physical layer identifiers (physical-layer cell identity, PCID).
, emphatically to the mapping mode of the shared running time-frequency resource of LS-PCFICH, be below also that the mapping mode of LS-PCFICH describes.Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the application can make up mutually.
The mapping mode 1 of embodiment 1:LS-PCFICH---LS-PCFICH, being mapped on time domain on any one OFDM symbol except the 1st OFDM symbol of backhaul subframe, is being mapped on frequency domain on the frequency domain resource identical with PCFICH.
For example, LS-PCFICH on the 2nd the OFDM symbol of the 1st slot that is mapped to the backhaul subframe on time domain, is being mapped on frequency domain on the frequency domain resource identical with PCFICH.
As shown in Figure 6, the macro PDCCH that eNB sends accounts for front 3 OFDM symbols of the 1st slot, and PCFICH accounts for the 1st the OFDM symbol of the 1st slot on time domain, and occupy is divided into 4 parts with whole bandwidth on frequency domain.
The mapping mode of LS-PCFICH is: on time domain, be mapped on the 2nd the OFDM symbol of the 1st slot of backhaul subframe; On frequency domain, and the alignment of PCFICH position.
LS before receiving its Physical Downlink Control Channel on back haul link, first receive LS-PCFICH, and then determines which OFDM sign-on to receive its Physical Downlink Control Channel from.Further, LS receives its Physical Downlink Shared Channel: on time domain, the original position of Physical Downlink Shared Channel and the original position of Physical Downlink Control Channel are consistent; On frequency domain, the position indicated according to its Physical Downlink Control Channel starts to receive.
Again for example, LS-PCFICH is being mapped on time domain on last 1 OFDM symbol of backhaul subframe,, in order to indicate the original position of LS wireless device in next subframe up-downgoing transmission, is being mapped on frequency domain on the frequency domain resource identical with PCFICH.
As shown in Figure 7, the macro PDCCH that eNB sends accounts for front 2 OFDM symbols of the 1st slot, and PCFICH accounts for the 1st the OFDM symbol of the 1st slot on time domain, and occupy is divided into 4 parts with whole bandwidth on frequency domain.
The mapping mode of LS-PCFICH is: on time domain, be mapped on last 1 OFDM symbol of backhaul subframe; On frequency domain, and the alignment of PCFICH position.At this moment, indication is the original position of next subframe up-downgoing transmission.
LS before receiving its Physical Downlink Control Channel on back haul link, first receive LS-PCFICH, and then determine which OFDM sign-on to receive its Physical Downlink Control Channel from next subframe.Further, LS receives its Physical Downlink Shared Channel: on time domain, the original position of Physical Downlink Shared Channel and the original position of Physical Downlink Control Channel are consistent; On frequency domain, the position indicated according to its Physical Downlink Control Channel starts to receive.
The mapping mode 2 of embodiment 2:LS-PCFICH---LS-PCFICH, being mapped on time domain on any a plurality of OFDM symbols except the 1st OFDM symbol of backhaul subframe, is being mapped on frequency domain on the frequency domain resource identical with PCFICH.
For example, LS-PCFICH on the 2nd and the 3rd the OFDM symbol of the 1st slot that is mapped to the backhaul subframe on time domain, is being mapped on frequency domain on the frequency domain resource identical with PCFICH.
As shown in Figure 8 and Figure 9, the macro PDCCH of eNB transmission only accounts for the 1st the OFDM symbol of the 1st slot; PCFICH accounts for the 1st the OFDM symbol of the 1st slot on time domain, occupy is divided into 4 parts with whole bandwidth on frequency domain.
The mapping mode of LS-PCFICH is: on time domain, be mapped to alternately on the 2nd and the 3rd the OFDM symbol of the 1st slot of backhaul subframe; On frequency domain, and the alignment of PCFICH position.
LS before receiving its Physical Downlink Control Channel on back haul link, first receive LS-PCFICH, and then determines which OFDM sign-on to receive its Physical Downlink Control Channel from.Further, LS receives its Physical Downlink Shared Channel: on time domain, the original position of Physical Downlink Shared Channel and the original position of Physical Downlink Control Channel are consistent; On frequency domain, the position indicated according to its Physical Downlink Control Channel starts to receive.
Again for example, LS-PCFICH is on last 2 OFDM symbols of the 2nd slot that is mapped to the backhaul subframe on time domain,, in order to indicate the original position of LS wireless device in next subframe up-downgoing transmission, be mapped on frequency domain on the frequency domain resource identical with PCFICH.
As shown in figure 10, the macro PDCCH of eNB transmission only accounts for the 1st the OFDM symbol of the 1st slot; PCFICH accounts for the 1st the OFDM symbol of the 1st slot on time domain, occupy is divided into 4 parts with whole bandwidth on frequency domain.
The mapping mode of LS-PCFICH is: on time domain, is mapped to alternately on last 2 OFDM symbols of the 2nd slot of backhaul subframe, and on frequency domain, and the alignment of PCFICH position.
LS before receiving its Physical Downlink Control Channel on back haul link, first receive LS-PCFICH, and then determine which OFDM sign-on to receive its Physical Downlink Control Channel from next subframe.Further, LS receives its Physical Downlink Shared Channel: on time domain, the original position of Physical Downlink Shared Channel and the original position of Physical Downlink Control Channel are consistent; On frequency domain, the position indicated according to its Physical Downlink Control Channel starts to receive.
The mapping mode 3 of embodiment 3:LS-PCFICH---LS-PCFICH is mapped on one or more RB or RB pair
Base station utilizes the frequency domain position at high-level signaling notice LS-PCFICH place, i.e. the call number of RB or RB pair, and for example, base station its LS-PCFICH of notice LS wireless device is mapped in RB0 or RB pair0.
The time-domain position at LS-PCFICH place: be mapped on other OFDM symbol except front 3 OFDM symbols of the 1st slot of RB0 or RB pair 0, as shown in figure 11.Perhaps be mapped on the 2nd slot of RB0 or RB pair 0, as shown in figure 12.
LS before receiving its Physical Downlink Control Channel on back haul link, first to receive LS-PCFICH on above-mentioned RB/RB pair, and then determines which OFDM sign-on to receive its Physical Downlink Control Channel from.Further, LS receives its Physical Downlink Shared Channel: on time domain, the original position of Physical Downlink Shared Channel and the original position of Physical Downlink Control Channel are consistent; On frequency domain, the position indicated according to its Physical Downlink Control Channel starts to receive.
The mapping mode 4 of embodiment 4:LS-PCFICH---LS-PCFICH is mapped on one section new carrier wave.
The new carrier wave that base station is the LS wireless device configuration has comparable bandwidths with compatible carrier wave, wherein, LS-PCFICH is being mapped on time domain on the 1st OFDM symbol of this new carrier wave, be mapped on frequency domain on fixing 1 or a plurality of RE, the preferential mapping mode that adopts PCFICH, namely the shared position of RE is divided into 4 parts with whole bandwidth on frequency domain.
ENB sends on compatible carrier wave macro PDCCH accounts for front 2 OFDM symbols of the 1st slot, and PCFICH accounts for the 1st the OFDM symbol of the 1st slot on time domain, and occupy is divided into 4 parts with whole bandwidth on frequency domain.The mapping mode of LS-PCFICH is: on time domain, be mapped on the 1st the OFDM symbol of the 1st slot of new carrier wave, RE occupy is divided into 4 parts with whole new carrier wave on frequency domain.
LS before receiving its Physical Downlink Control Channel on the back haul link of compatible carrier wave, first to receive LS-PCFICH on new carrier wave, and then determines to receive its Physical Downlink Control Channel from which OFDM sign-on of compatible carrier wave.Further, LS receives its Physical Downlink Shared Channel: on time domain, the original position of Physical Downlink Shared Channel and the original position of Physical Downlink Control Channel are consistent; On frequency domain, the position indicated according to its Physical Downlink Control Channel starts to receive.
Embodiment 5:LS-PCFICH is mapped on the 1st slot or the 2nd slot of 1 or a plurality of RB/RB pair of new carrier wave.
Base station utilizes high-level signaling to configure one or more RB for the LS wireless device on new carrier wave and is specifically designed to carrying LS-PCFICH, perhaps fixed 1 or a plurality of RB be specifically designed to carrying LS-PCFICH.At this moment, LS-PCFICH can be mapped on time domain above-mentioned 1 or the 1st slot of a plurality of RB or the 2nd slot on or on two slot.
In order to realize above method, the present invention also provides a kind of local service (LS) wireless device, and as shown in figure 13, this equipment comprises:
The indicating channel information receiving module, be used in the upper of any one or a plurality of OFDM symbols except the 1st OFDM symbol of backhaul (backhaul) subframe or be the Physical Control Format Indicator Channel (LS-PCFICH) of the local service wireless device special use of reception base station transmission on the new carrier wave of its distribution in base station, this LS-PCFICH is in order to the original position of dynamic indication LS wireless device downlink transmission data of current subframe or next subframe on back haul link;
The transmission of data receiver module, be used for starting to receive downlink transmission data from the original position that the LS-PCFICH that receives indicates.
The present invention also provides a kind of base station, and as shown in figure 14, this base station comprises:
The indicating channel information sending module, be used for the upper of any one or a plurality of OFDM symbols except the 1st OFDM symbol of backhaul (backhaul) subframe or its be on the new carrier wave of local service (LS) wireless device distribution to the Physical Control Format Indicator Channel (LS-PCFICH) of LS wireless device transmission local service wireless device special use, this LS-PCFICH is in order to the original position of dynamic indication LS wireless device downlink transmission data of current subframe or next subframe on back haul link;
The downlink transmission data sending module, be used for starting to be sent in to described LS wireless device from the original position of described LS-PCFICH indication the downlink transmission data of current subframe on back haul link or next subframe.
As previously mentioned, the running time-frequency resource that takies of described LS-PCFICH be following any one:
On any one the OFDM symbol that is mapped on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or,
On any two or more OFDM symbols that are mapped to alternately on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or
Respective base station utilize high-level signaling for pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain on other OFDM symbol except front 3 OFDM symbols of the 1st time slot, or on all OFDM symbols of the 2nd time slot, perhaps on all the OFDM symbols except front 3 OFDM symbols; Or,
Respective base station is the new carrier wave of its distribution, wherein, is being mapped on time domain on the 1st OFDM symbol, be mapped on frequency domain 1 or a plurality of Resource Unit (RE) on; Or,
Respective base station for the new carrier wave of its distribution and base station be pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain this 1 or the 1st time slot of a plurality of RB/RB pair or the 2nd time slot or two time slots on.
In sum, method of the present invention, subscriber equipment and base station, can be applicable to well LS, cellular communication communicate by letter with the LS Physical Downlink Control Channel of LS and the notice problem of Physical Downlink Shared Channel while coexisting have been solved, avoided the interference between cellular communication and LS communication, both guarantee communication efficiency and reliability, also improved the resource utilization of system simultaneously.
One of ordinary skill in the art will appreciate that all or part of step in said method can come the instruction related hardware to complete by program, described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (10)
1. a back haul link downlink transfer implementation method, is characterized in that, the method comprises:
Local service (LS) wireless device is in the upper of any one or a plurality of OFDM symbols except the 1st OFDM symbol of backhaul (backhaul) subframe or be the Physical Control Format Indicator Channel (LS-PCFICH) that receives the local service wireless device special use that base station sends on the new carrier wave of its distribution in base station, and this LS-PCFICH is in order to the original position of dynamic indication LS wireless device downlink transmission data of current subframe or next subframe on back haul link;
Described LS wireless device starts to receive downlink transmission data from the original position that the described LS-PCFICH that receives indicates.
2. the method for claim 1, is characterized in that, the running time-frequency resource that described LS-PCFICH takies is:
On any one the OFDM symbol that is mapped on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or,
On any two or more OFDM symbols that are mapped to alternately on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH).
3. the method for claim 1, is characterized in that, the running time-frequency resource that described LS-PCFICH takies is:
Respective base station utilize high-level signaling for pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain on other OFDM symbol except front 3 OFDM symbols of the 1st time slot, or on all OFDM symbols of the 2nd time slot, perhaps on all the OFDM symbols except front 3 OFDM symbols.
4. the method for claim 1, is characterized in that, the running time-frequency resource that described LS-PCFICH takies is:
Respective base station is the new carrier wave of its distribution, wherein, is being mapped on time domain on the 1st OFDM symbol, be mapped on frequency domain 1 or a plurality of Resource Unit (RE) on; Or,
Respective base station for the new carrier wave of its distribution and base station be pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain this 1 or the 1st time slot of a plurality of RB/RB pair or the 2nd time slot or two time slots on.
5. a back haul link downlink transfer implementation method, is characterized in that, the method comprises:
Base station is to send the Physical Control Format Indicator Channel (LS-PCFICH) of local service wireless device special use on the new carrier wave that distributes of local service (LS) wireless device to described LS wireless device in the upper of any one or a plurality of OFDM symbols except the 1st OFDM symbol of backhaul (backhaul) subframe or at it, and this LS-PCFICH is in order to the original position of dynamic indication LS wireless device downlink transmission data of current subframe or next subframe on back haul link;
Described base station starts to be sent in to described LS wireless device the downlink transmission data of current subframe on back haul link or next subframe from the original position of described LS-PCFICH indication.
6. method as claimed in claim 5, is characterized in that, the running time-frequency resource that described LS-PCFICH takies be following any:
On any one the OFDM symbol that is mapped on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or,
On any two or more OFDM symbols that are mapped to alternately on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or,
Respective base station utilize high-level signaling for pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain on other OFDM symbol except front 3 OFDM symbols of the 1st time slot, or on all OFDM symbols of the 2nd time slot, perhaps on all the OFDM symbols except front 3 OFDM symbols; Or,
Respective base station is the new carrier wave of its distribution, wherein, is being mapped on time domain on the 1st OFDM symbol, be mapped on frequency domain 1 or a plurality of Resource Unit (RE) on; Or,
Respective base station for the new carrier wave of its distribution and base station be pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain this 1 or the 1st time slot of a plurality of RB/RB pair or the 2nd time slot or two time slots on.
7. a local service (LS) wireless device, is characterized in that, this equipment comprises:
The indicating channel information receiving module, be used in the upper of any one or a plurality of OFDM symbols except the 1st OFDM symbol of backhaul (backhaul) subframe or be the Physical Control Format Indicator Channel (LS-PCFICH) of the local service wireless device special use of reception base station transmission on the new carrier wave of its distribution in base station, this LS-PCFICH is in order to the original position of dynamic indication LS wireless device downlink transmission data of current subframe or next subframe on back haul link;
The transmission of data receiver module, be used for starting to receive downlink transmission data from the original position that the LS-PCFICH that receives indicates.
8. equipment as claimed in claim 7, is characterized in that, the running time-frequency resource that described LS-PCFICH takies be following any:
On any one the OFDM symbol that is mapped on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or,
On any two or more OFDM symbols that are mapped to alternately on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or,
Respective base station utilize high-level signaling for pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain on other OFDM symbol except front 3 OFDM symbols of the 1st time slot, or on all OFDM symbols of the 2nd time slot, perhaps on all the OFDM symbols except front 3 OFDM symbols; Or,
Respective base station is the new carrier wave of its distribution, wherein, is being mapped on time domain on the 1st OFDM symbol, be mapped on frequency domain 1 or a plurality of Resource Unit (RE) on; Or,
Respective base station for the new carrier wave of its distribution and base station be pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain this 1 or the 1st time slot of a plurality of RB/RB pair or the 2nd time slot or two time slots on.
9. a local service base station, is characterized in that, this base station comprises:
The indicating channel information sending module, be used for the upper of any one or a plurality of OFDM symbols except the 1st OFDM symbol of backhaul (backhaul) subframe or its be on the new carrier wave of local service (LS) wireless device distribution to the Physical Control Format Indicator Channel (LS-PCFICH) of LS wireless device transmission local service wireless device special use, this LS-PCFICH is in order to the original position of dynamic indication LS wireless device downlink transmission data of current subframe or next subframe on back haul link;
The downlink transmission data sending module, be used for starting to be sent in to described LS wireless device from the original position of described LS-PCFICH indication the downlink transmission data of current subframe on back haul link or next subframe.
10. base station as claimed in claim 9, is characterized in that, the running time-frequency resource that described LS-PCFICH takies be following any one:
On any one the OFDM symbol that is mapped on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or,
On any two or more OFDM symbols that are mapped to alternately on time domain except the 1st OFDM symbol, be mapped on frequency domain on the identical or different frequency domain resource of Physical Control Format Indicator Channel (PCFICH); Or
Respective base station utilize high-level signaling for pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain on other OFDM symbol except front 3 OFDM symbols of the 1st time slot, or on all OFDM symbols of the 2nd time slot, perhaps on all the OFDM symbols except front 3 OFDM symbols; Or,
Respective base station is the new carrier wave of its distribution, wherein, is being mapped on time domain on the 1st OFDM symbol, be mapped on frequency domain 1 or a plurality of Resource Unit (RE) on; Or,
Respective base station for the new carrier wave of its distribution and base station be pre-configured one or more Physical Resource Block (RB) of LS wireless device or Physical Resource Block to (RB pair), be mapped on time domain this 1 or the 1st time slot of a plurality of RB/RB pair or the 2nd time slot or two time slots on.
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| CN2012101421225A CN103391550A (en) | 2012-05-09 | 2012-05-09 | Method for achieving backhaul link downlink transmission, LS wireless device and base station |
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