CN103260241B - The time-division multiplexing method of down control channel and DSCH Downlink Shared Channel and device - Google Patents
The time-division multiplexing method of down control channel and DSCH Downlink Shared Channel and device Download PDFInfo
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Abstract
The invention provides the time-division multiplexing method of a kind of down control channel and DSCH Downlink Shared Channel, including: the identical time-frequency domain resources that down control channel (PDCCH) takies in same RB with DSCH Downlink Shared Channel (PDSCH) is set; The size of described identical time-frequency domain resources ensures PDCCH information end of transmission in 1 RB; When carrying out data transmission, PDCCH and PDSCH is in time-frequency domain resources identical described in different subframe multiplexings. Present invention also offers the TDMD time division multiplex device of a kind of down control channel and DSCH Downlink Shared Channel. By means of the invention it is possible to raising resource utilization, and reduce implementation complexity.
Description
Technical field
The present invention relates to the multi-channel Technology in communication system, particularly to time-division multiplexing method and the device of down control channel (PDCCH) and DSCH Downlink Shared Channel (PDSCH).
Background technology
Current 230MHz frequency range is mainly used in data radio station and undertakes long-range data collection task, because the speed provided very low is only used for some simple communications applications, it is impossible to meet intelligent grid and the growing business demand of Sensor Network. According to the planning that national grid is following, it is desirable to find a kind of new broadband communications technologies, meet the business demand in its distribution automation, load management, power information collection, smart power grid user service, emergency first-aid repair, the big field of special area video monitoring six.
230MHz frequency range product based on TD-LTE technology is that the demand provides good solution, this product inherits the advantage that channel is smooth and intersymbol interference is smaller of OFDM orthogonal multi-sub carrier-wave transmission, and innovatively played the characteristics such as the expansibility of OFDMA system, frequency selectivity and dispatching flexibility, creationary absorb the advanced communication theory such as carrier aggregation, frequency spectrum perception, constitute a new generation's low-power consumption, high spectrum utilization, the multi-business communication system flexibly of high reliability. The business need of power load monitoring system be can farthest meet, solid technological accumulation and Applied D emonstration provided for the planning of national grid next generation network simultaneously.
In view of national grid frequency range is discrete and the characteristic of narrow bandwidth, relative continuous print frequency spectrum is referred to as bunch (or being referred to as carrier wave), each bunch is the subband of 25kHz containing multiple bandwidth. Subband continuously, is the least unit of frequency domain resource scheduling distribution on frequency domain. For reaching the peak use rate of resource, down control channel (PDCCH) and DSCH Downlink Shared Channel (PDSCH) adopt time-multiplexed mode to carry out data transmission.
Description according to 3GPP agreement, PDCCH and PDSCH in LTE system adopts time division multiplexing mode in subframe to carry out the transmission of downlink data information, UE, according to the resource allocation information parsed in PDCCH channel, receives business datum on corresponding PDSCH channel resource.Fig. 1 is each physical channel distribution schematic diagram in LTE system.
As it is shown in figure 1, PDCCH and PDSCH is time division multiplexing mode in subframe in LTE system, in frequency domain, scheduling granularity is 180kHz; When in above-mentioned subframe, time division multiplexing mode is applied in the narrowband systems that frequency spectrum is discrete, it is used for carrying the frequency domain resource likely more than one subband of PDCCH information in subframe, and the least unit of frequency domain resource scheduling is 1 subband in a subframe, it is therefore possible to occur PDCCH information in 1 subframe cannot the situation of end of transmission, this will result in following problem:
If 1 descending employing Distributed mode carries out data transmission, namely in same subframe, dispatch multiple subband, for transmitting PDCCH information, then add system algorithm difficulty and implementation complexity, reduce resource utilization and data transmission efficiency, the Qos of user cannot ensure, adds terminal cost because of the increasing of reception bandwidth simultaneously;
If 2 descending do not adopt Distributed mode to carry out data transmission, then Downlink Control Information needs the transmission of many subframe pattern, causes that data dispatch efficiency declines.
For the narrow-band communication system that other frequency spectrums except national grid are discrete, when PDCCH and PDSCH multiplexing, also can there are the problems referred to above.
Summary of the invention
The invention provides the time-division multiplexing method of down control channel and DSCH Downlink Shared Channel and device, it is possible to increase resource utilization, and reduce implementation complexity.
For achieving the above object, the present invention adopts the following technical scheme that:
A kind of time-division multiplexing method of down control channel and DSCH Downlink Shared Channel, including:
The identical time-frequency domain resources that down control channel (PDCCH) takies in same RB with DSCH Downlink Shared Channel (PDSCH) is set; The size of described identical time-frequency domain resources ensures PDCCH information end of transmission in 1 RB;
When carrying out data transmission, PDCCH and PDSCH is in time-frequency domain resources identical described in different subframe multiplexings.
It is preferred that utilize Physical Control Format Indicator Channel (PCFICH) to indicate PDCCH information or the PDSCH information transmitted in the time-frequency domain resources of multiplexing described in present sub-frame.
It is preferred that UE receives after present sub-frame, what determine that present sub-frame transmits according to the instruction of PCFICH is PDCCH information or PDSCH information, and corresponding information is resolved.
A kind of TDMD time division multiplex device of down control channel and DSCH Downlink Shared Channel, including: unit and Multiplexing Unit are set;
Described unit is set, being used for, down control channel (PDCCH) is set and takies the identical time-frequency domain resources in a RB with DSCH Downlink Shared Channel (PDSCH); The size of described identical time-frequency domain resources ensures PDCCH information end of transmission in 1 RB block;
Described Multiplexing Unit, for when carrying out data transmission, PDCCH and PDSCH is in time-frequency domain resources identical described in different subframe multiplexings.
It is preferred that described Multiplexing Unit includes instruction subelement and transmission subelement;
Described instruction subelement, indicates, by Physical Control Format Indicator Channel (PCFICH), PDCCH information or the PDSCH information transmitted in the time-frequency domain resources of multiplexing described in present sub-frame;
Described transmission subelement, for the instruction according to described instruction subelement, is carried in described identical time-frequency domain resources by corresponding PDCCH information or PDSCH information and sends.
As seen from the above technical solution, in the present invention, PDCCH and PDSCH is set and takies identical sign resources;The size of this same-sign resource ensures PDCCH information end of transmission in 1 RB block; When carrying out data transmission, PDCCH and PDSCH is in the same-sign resource set by different subframe multiplexings. By the way, PDCCH and PDSCH, in different subframe multiplexed resource, utilizes more resource transmission PDCCH information, it is ensured that PDCCH information is end of transmission in a subframe in a subframe.
Accompanying drawing explanation
Fig. 1 is each physical channel distribution schematic diagram in LTE system;
Fig. 2 is the time-division multiplexing method schematic flow sheet of PDCCH and PDSCH in the present invention;
Fig. 3 is each physical channel distribution schematic diagram in example of the present invention;
Fig. 4 is the structural representation of the TDMD time division multiplex device of PDCCH and PDSCH in the present invention.
Detailed description of the invention
For making the purpose of the present invention, technological means and advantage clearly understand, below in conjunction with accompanying drawing, the present invention is described in further details.
1 Resource Block (RB) refers to the time-frequency domain resources of 1 subband in single sub-frame.
The present invention provides the new time-division multiplexing method of a kind of PDCCH and PDSCH, implements flow process as in figure 2 it is shown, include:
Step 201, arranges PDCCH and the PDSCH identical time-frequency domain resources taking in same RB, and wherein, shared time-frequency domain resources is sized to ensure PDCCH information end of transmission in 1 RB.
For state's electricity 230 systems, this system is the narrow band width wireless communication systems that frequency spectrum is discrete, and the frequency range of each contact is called subband, and the spectral bandwidth of subband is 25kHz, and subframe lengths is 5ms. Channel distribution as it is shown on figure 3, be wherein set to PDCCH and the PDSCH resource shared by the time-frequency domain resources of rear 5 time-domain symbol of subframe.
Size for PDCCH and the PDSCH identical time-frequency domain resources arranged is limited in, need to ensure that PDCCH information can be transmitted in 1 RB, so, just can avoid the data transmission adopting distributed mode to carry out PDCCH, reduce system algorithm difficulty and implementation complexity, it is also possible to avoid, in one PDCCH information of multiple sub-frame transmission, improve resource utilization and data transmission efficiency, the Qos making user obtains guarantee, reduces terminal unit cost.
Step 202, when carrying out data transmission, the identical time-frequency domain resources that PDCCH and PDSCH is arranged in different subframe de-multiplexing steps 201, and that indicate that present sub-frame carries is PDCCH or PDSCH.
On different sub frames, the identical time-frequency domain resources arranged in step 201 is as PDCCH or as PDSCH, and corresponding subframe is used for transmitting PDCCH information or PDSCH information.
Specifically, it is possible to the logical corresponding time-frequency domain resources transmission vowing UE present sub-frame is PDCCH information or PDSCH information in several ways. Such as, in state's electricity 230 systems, Physical Control Format Indicator Channel (PCFICH) can be utilized to indicate present sub-frame transmission PDCCH information or PDSCH information, concrete indicating mode can arbitrarily set as required, belong to the common technology means of those skilled in the art, just repeat no more here. When the time-frequency domain resources that PDCCH and PDSCH multiplexing is identical, it is possible to set present sub-frame carrying PDCCH or PDSCH according to actual needs, it is possible to be the not corresponding time-frequency domain resources of grade multiplexing, naturally it is also possible to grade multiplexing.
Step 203, UE receives after present sub-frame, and what determine that present sub-frame transmits according to instruction is PDCCH information or PDSCH information, and corresponding information is resolved.
After UE receives present sub-frame, determine PDCCH or PDSCH of carrying in the identical time-frequency domain resources arranged in step 201 according to instruction, then, carry out information analysis according to the result determined. Such as, if utilizing PCFICH to indicate in step 202, then first UE resolves PCFICH, resolves PDCCH or PDSCH again according to the instruction information that this channel carries.
So far, the method flow in the present invention terminates. By the mode of the invention described above, PDCCH and PDSCH adopts time division multiplexing mode between subframe, and ensure that PDCCH information can be carried in 1 RB, thus avoiding Distributed mode or the transmission of many subframe pattern. In single sub-frame, whether carrying PDCCH information and PDSCH information are specified by PCFICH information.
It addition, present invention also offers a kind of TDMD time division multiplex device, for implementing the time-division multiplexing method of the invention described above. The concrete structure of this TDMD time division multiplex device as shown in Figure 4, including: unit and Multiplexing Unit are set. Wherein, unit is set, takies the identical time-frequency domain resources in a RB for arranging PDCCH and PDSCH; The size of this identical time-frequency domain resources ensures PDCCH information end of transmission in 1 RB block. Multiplexing Unit, for when carrying out data transmission, PDCCH and PDSCH is in the identical frequency domain resource of different subframe multiplexings.
Concrete Multiplexing Unit may contain an indication that subelement and transmission subelement. Wherein, indicate subelement, indicate, by Physical Control Format Indicator Channel (PCFICH), PDCCH information or the PDSCH information transmitted in the time-frequency domain resources of present sub-frame multiplexing. Transmission subelement, for the instruction according to instruction subelement, is carried in identical time-frequency domain resources by corresponding PDCCH information or PDSCH information and sends.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within the scope of protection of the invention.
Claims (5)
1. the time-division multiplexing method of a down control channel and DSCH Downlink Shared Channel, it is characterised in that the method includes:
The identical time-frequency domain resources that Physical Downlink Control Channel (PDCCH) takies in same RB with Physical Downlink Shared Channel (PDSCH) is set; The size of described identical time-frequency domain resources ensures PDCCH information end of transmission in 1 RB;
When carrying out data transmission, PDCCH and PDSCH is in time-frequency domain resources identical described in different subframe multiplexings;
Wherein, 1 RB refers to the time-frequency domain resources of 1 subband in single sub-frame, and described subband is continuous print 25kHz bandwidth resources on frequency domain, and described subband is the least unit of frequency domain resource scheduling.
2. method according to claim 1, it is characterised in that utilize Physical Control Format Indicator Channel (PCFICH) to indicate PDCCH information or the PDSCH information transmitted in the time-frequency domain resources of multiplexing described in present sub-frame.
3. method according to claim 2, it is characterised in that UE receives after present sub-frame, what determine that present sub-frame transmits according to the instruction of PCFICH is PDCCH information or PDSCH information, and corresponding information is resolved.
4. the TDMD time division multiplex device of a down control channel and DSCH Downlink Shared Channel, it is characterised in that this device includes: arrange unit and Multiplexing Unit;
Described unit is set, being used for, Physical Downlink Control Channel (PDCCH) is set and takies the identical time-frequency domain resources in a RB with Physical Downlink Shared Channel (PDSCH);The size of described identical time-frequency domain resources ensures PDCCH information end of transmission in 1 RB block;
Described Multiplexing Unit, for when carrying out data transmission, PDCCH and PDSCH is in time-frequency domain resources identical described in different subframe multiplexings;
Wherein, 1 RB refers to the time-frequency domain resources of 1 subband in single sub-frame, and described subband is continuous print 25kHz bandwidth resources on frequency domain, and described subband is the least unit of frequency domain resource scheduling.
5. device according to claim 4, it is characterised in that described Multiplexing Unit includes instruction subelement and transmission subelement;
Described instruction subelement, indicates, by Physical Control Format Indicator Channel (PCFICH), PDCCH information or the PDSCH information transmitted in the time-frequency domain resources of multiplexing described in present sub-frame;
Described transmission subelement, for the instruction according to described instruction subelement, is carried in described identical time-frequency domain resources by corresponding PDCCH information or PDSCH information and sends.
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| CN104955155B (en) * | 2014-03-31 | 2019-01-01 | 中国电信股份有限公司 | PDSCH data receiver method, sending method, user equipment and eNB |
| CN106571899B (en) * | 2015-10-08 | 2019-12-20 | 普天信息技术有限公司 | Narrow-band wireless communication system and time division multiplexing method of PDCCH (physical Downlink control channel) and PDSCH (physical Downlink shared channel) thereof |
| CN108811094B (en) * | 2017-05-02 | 2021-08-13 | 普天信息技术有限公司 | Data transmission method |
| CN109152020B (en) * | 2017-06-16 | 2022-04-05 | 华为技术有限公司 | Data receiving method, related equipment and system |
| CN109714100B (en) * | 2017-12-26 | 2021-08-06 | 电子科技大学 | Optical fiber nonlinear crosstalk calculation method for multi-wavelength channel |
| CN109922530B (en) * | 2019-04-03 | 2022-11-08 | 成都中科微信息技术研究院有限公司 | Method for optimizing transmission delay of control information of power wireless private network |
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| CN101754376A (en) * | 2008-12-05 | 2010-06-23 | 中兴通讯股份有限公司 | Method for allocating downlink resources of a orthogonal frequency division multiplexing system |
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| EP2366263A4 (en) * | 2008-12-16 | 2012-08-29 | Nokia Corp | System and method to avoid downlink control channel coverage limitation in a communication system |
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| CN101345985A (en) * | 2007-07-12 | 2009-01-14 | 华为技术有限公司 | Method and device for improving resource utilization rate in radio communication system |
| CN101309523A (en) * | 2008-06-23 | 2008-11-19 | 中兴通讯股份有限公司 | Method for transmitting physical downlink channel control signal |
| CN101754376A (en) * | 2008-12-05 | 2010-06-23 | 中兴通讯股份有限公司 | Method for allocating downlink resources of a orthogonal frequency division multiplexing system |
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