CN102892083A - Data transmission method in trunking group call - Google Patents
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Abstract
The invention discloses a data transmission method in trunking group call. The method comprises the following steps: packaging DCI (downlink control information) through a preset DCI format dedicated for trunking group call transmission on a physical downlink control channel (PDCCH) by a base station eNB (evolved bode B); sending the DCI scrambled and packaged by an identification; detecting the PDCCH by a terminal UE (user equipment); and demodulating a physical downlink shared channel (PDSCH) corresponding to the PDCCH. After data transmission method provided by the embodiment of the invention is applied, group call business data can be transmitted on the PDSCH so as to transmit the multipoint trunking business.
Description
Technical field
The present invention relates to communication technical field, more specifically, relate to data transfer method in a kind of cluster multi call.
Background technology
The cluster multi call business is a kind of point-to-multipoint business, is bringing into play huge effect in the specialized communication field.At present, the digital clustering communication system that domestic application has the cluster multi call business more widely has land trunked radio (TETRA), integrated digital enhancement network (iDEN), global opening cluster topology (GoTa) and 800MHz based on cluster (GT800) of GSM technology etc., and these systems all are based on GSM technology or CDMA technology.
The TD-LTE technology is new generation broadband mobile communication wireless access technology, compares with the wireless access technology of existing 2G, 3G mobile communication system, the characteristics such as it has, and transmission rate is high, propagation delay time is little, high QoS assurance.Technical at existing TD-LTE, increase group service, be the developing direction of trunked communication system.
Regulation according to the LTE agreement, user (UE) is when downlink data receiving, in order to effectively utilize the resource of control area, reduce the expense of signaling, adopt the mode of Physical Downlink Control Channel (PDCCH) blind check to obtain Downlink Control Information (DCI).Then, UE is according to the DCI among the PDCCH that receives, the Physical Downlink Shared Channel (PDSCH) that demodulation is corresponding with PDCCH.
The PDCCH blind check be UE the DCI form of not knowing current PDCCH carrying and the resource location that takies the time, various possible DCI forms and the resource location that may take are carried out tentative decoding.If the CRC that carries among information bit cyclic redundancy check (CRC) code (CRC) and the PDCCH after the decoding is identical, think that then the information bit that current PDCCH carries is exactly the DCI of current transmission.The set of the PDCCH resource of blind check is the PDCCH search volume, is divided into the exclusive search volume of public search space and UE.Wherein, public search space is all set of the necessary PDCCH resource that detects for all UE.The exclusive search volume of UE is the set of each UE PDCCH resource that self need to detect.Public search space can be overlapping with the exclusive search volume of UE.
Wideband digital trunked communication system based on the TD-LTE technology, not only can support the various multimedia services of TD-LTE mobile communication system self, and basic trunked call service and Cluster Multimedia business can be provided, such as voice group call service, voice individual calling, visual group calling, visual individual calling, broadcast ﹠ call, real-time video transmission etc.
Yet, not yet consider the group service of point-to-multipoint in the standard of LTE system, do not provide in the current LTE agreement and how to use PDSCH to realize the professional transmission of cluster multi call.
Summary of the invention
The embodiment of the invention proposes data transfer method in a kind of cluster multi call, can at the PDSCH transmitting data, realize the group service of point-to-multipoint.
The technical scheme of the embodiment of the invention is as follows:
Data transfer method in a kind of cluster multi call, the method comprises:
Base station eNB by the cluster multi call transmission private downlink control information DCI form encapsulation DCI that sets in advance, and sends by the DCI after the sign scrambling encapsulation on physical downlink control channel PDCCH;
Terminal UE detects PDCCH, the Physical Downlink Shared Channel PDSCH that demodulation is corresponding with PDCCH.
Described DCI form comprises: the flag of centralised allocation or the flag of distributed allocation, resource block assignments and modulation coding mode.
During the transmission trunking paging control information, the DCI after described transmission is encapsulated by the sign scrambling comprises: send by the DCI after the encapsulation of clustered paging sign TP-RNTI scrambling.
The DCI of described transmission after by the encapsulation of TP-RNTI scrambling comprises: the CRC check information bit with the DCI of TP-RNTI after to encapsulation is carried out scrambling, obtains the DCI of scrambling encapsulation; Send the DCI of scrambling encapsulation at the public search space of PDCCH, the transmission plan of configuration PDSCH.
The transmission plan of described configuration PDSCH comprises: judge whether Physical Broadcast Channel PBCH antenna port number is 1, if so, the configuration transmission plan is that single antenna port and port are 0, otherwise the configuration transmission plan is transmit diversity.
During transmission trunking group-calling service data, the DCI after described transmission is encapsulated by the sign scrambling comprises: send by the DCI after the encapsulation of group calling sign G-RNTI scrambling.
The DCI of described transmission after by the encapsulation of G-RNTI scrambling comprises: the CRC check information bit with the DCI of G-RNTI after to encapsulation is carried out scrambling, obtains the DCI of scrambling encapsulation; The DCI that sends the scrambling encapsulation in public search space and the exclusive search volume of UE of PDCCH, the transmission plan of configuration PDSCH.
The transmission plan of described configuration PDSCH comprises: when the transmission mode of UE is pattern 1, the configuration transmission plan is that single antenna port and port are 0; When the transmission mode of UE one of is pattern 2 to the pattern 8, the configuration transmission plan is transmit diversity.
Can find out from technique scheme, in embodiments of the present invention, base station (eNB) transmits special-purpose DCI form encapsulation DCI by the cluster multi call that sets in advance on PDCCH, and sends by the DCI after the sign scrambling encapsulation; UE detects PDCCH, the PDSCH that demodulation is corresponding with PDCCH.Transmit special-purpose DCI form by the cluster multi call that sets in advance, can at the PDSCH transmitting data, realize the group service of point-to-multipoint.
Description of drawings
Fig. 1 is data transfer method flow schematic diagram in the embodiment of the invention cluster multi call.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
In embodiments of the present invention, when PDSCH transmission cluster multi call data, eNB and sends by the DCI after the sign scrambling encapsulation after transmitting special-purpose DCI form encapsulation by the cluster multi call that sets in advance on the PDCCH; UE detects PDCCH, and then the demodulation PDSCH corresponding with PDCCH.According to the characteristics of cluster multi call business, cross the cluster multi call that sets in advance and transmit special-purpose DCI form, can realize the group service of point-to-multipoint at the PDSCH transmitting data, guarantee simultaneously the normal operation of the various functions of LTE system itself.
Be data transfer method flow schematic diagram in the cluster multi call referring to accompanying drawing 1, specifically may further comprise the steps:
Before PDSCH transmission cluster multi call business datum, eNB transmits special-purpose DCI form encapsulation DCI by the cluster multi call that sets in advance on PDCCH.Specifically comprise two kinds of situations of step 102 and step 103.
Because the cluster multi call business is point multipoint message traffic and does not support mixed automatic retransfer request (HARQ), existing DCI form has a lot of redundant informations in the LTE agreement if use, such as transmission power control (TPC) instruction on HARQ process number, new data indication, redundancy versions, the Physical Uplink Control Channel (PUCCH) etc., cause unnecessary PDCCH expense.So according to the characteristics of cluster multi call, cluster multi call transmits special-purpose DCI form, does not have redundant information to save bit number, when using the same asset transmission, increased the reliability of transmission.
Referring to table 1, the corresponding DCI form of cluster multi call data comprises: localized virtual resource block allocation identification position or distributed virtual resource block allocation identification position, resource block assignments and modulation coding mode.Localized virtual resource block allocation identification position or distributed virtual resource block allocation identification bit stealing 1 bit; Resource block assignments takies
Bit, wherein
It is the downlink bandwidth of the system that represents of the form with the physical resource number of blocks; Modulation coding mode takies 5 bits.
Localized virtual resource block allocation identification position or distributed virtual resource block allocation identification position (Localized/Distributed VRB assignment flag), what be used to indicate current PDSCH transmission employing is localized virtual resource block or distributed virtual resource block, and the resource mapping method of its PDSCH is different.
Resource block assignments (Resource block assignment) is used to indicate the shared physical resource position of PDSCH.
Modulation coding mode (Modulation and coding scheme) is used to indicate the modulation coding mode that PDSCH transmits.
Table 1DCI form
When the transmission trunking paging control information, with TP-RNTI the CRC check information bit of the DCI after encapsulating is carried out scrambling, obtain the DCI of scrambling encapsulation; Send the DCI of scrambling encapsulation at the public search space of PDCCH, the transmission plan of configuration PDSCH
Provided the transmission plan of configuration PDSCH in the table 2: judge whether Physical Broadcast Channel (PBCH) antenna port number is 1, if so, transmission plan configuration single antenna port and port are 0, otherwise transmission plan is configured to transmit diversity.
The PDSCH configuration that table 2TP-RNTI is corresponding
Cluster multi call is point-to-multipoint business, user for same cluster multi call business may be the optional position that is randomly dispersed in the residential quarter, may there be very large difference in cluster multi call user channel quality separately so, particularly when cell coverage area may be very large, may be very poor apart from the cluster multi call user profile quality that the base station is far away.In order to guarantee the service quality of cluster multi call business, the professional transmission plan that adopts of cluster multi call is single-input single-output (SISO) scheme or emission diversity scheme.The SISO scheme, namely single-input single-output is used for single antenna and sends.Emission diversity scheme is many antennas send mode, and it is conducive to anti-fading, and the reliability that improves link.
UE in the cluster group is carrying out PDSCH when receiving, high-rise configuration UE, and descrambling is carried out the PDCCH of CRC scrambling by TP-RNTI.UE is according to the configuration demodulation PDCCH in the table 2 and corresponding PDSCH, and the corresponding PDSCH of PDCCH carries out the scrambler initialization by TP-RNTI therewith.
When transmission trunking group-calling service data, eNB is at the DCI of PDCCH transmission by the G-RNTI scrambling.Concrete, with G-RNTI the CRC check information bit of the DCI after encapsulating is carried out scrambling, obtain the DCI of scrambling encapsulation; The DCI that sends the scrambling encapsulation in public search space and the exclusive search volume of UE of PDCCH, the transmission plan of configuration PDSCH.
Provided the transmission plan of PDSCH in the table 3: the transmission plan for UE is determined according to transmission mode and the DCI form of UE.When the transmission mode of UE is that pattern 1 and DCI form are in the table 1 during the DCI form, it is 0 that the transmission plan of UE adopts single antenna port and port; When the transmission mode of UE one of is pattern 2 to the pattern 8 and the DCI form is in the table 1 during the DCI form, the transmission plan of UE adopts transmit diversity.
The PDSCH configuration that table 3G-RNTI is corresponding
In the Rel-9 agreement, provide 8 kinds of transmission modes, provide corresponding transmission plan to finish corresponding function under every kind of transmission mode.Transmission plan comprises single antenna port, transmit diversity, Open-Loop Spatial Multiplexing, Closed-Loop Spatial Multiplexing, multiuser MIMO etc.
In fact, can find out by table 3, the transmission plan of UE can directly be determined according to the transmission mode of UE, still in order to consider extensibility, if UE increases other transmission plan under same transmission mode, just also need to determine transmission plan by the DCI form.
And the UE in the cluster group is carrying out PDSCH when receiving, the transmission mode of high-rise configuration UE, and descrambling is carried out the PDCCH of CRC scrambling by G-RNTI.UE is according to configuration demodulation PDCCH and all corresponding PDSCH corresponding in the table 3, and the corresponding PDSCH of PDCCH carries out the scrambler initialization by G-RNTI therewith.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. data transfer method in the cluster multi call is characterized in that, the method comprises:
Base station eNB by the cluster multi call transmission private downlink control information DCI form encapsulation DCI that sets in advance, and sends by the DCI after the sign scrambling encapsulation on physical downlink control channel PDCCH;
Terminal UE detects PDCCH, the Physical Downlink Shared Channel PDSCH that demodulation is corresponding with PDCCH.
2. data transfer method in the described cluster multi call according to claim 1 is characterized in that, described DCI form comprises: the flag of centralised allocation or the flag of distributed allocation, resource block assignments and modulation coding mode.
3. data transfer method in the described cluster multi call according to claim 1 is characterized in that, during the transmission trunking paging control information, the DCI of described transmission after by sign scrambling encapsulation comprises: send by the DCI after the encapsulation of clustered paging sign TP-RNTI scrambling.
4. data transfer method in the described cluster multi call according to claim 3, it is characterized in that, the DCI of described transmission after by the encapsulation of TP-RNTI scrambling comprises: the CRC check information bit with the DCI of TP-RNTI after to encapsulation is carried out scrambling, obtains the DCI of scrambling encapsulation; Send the DCI of scrambling encapsulation at the public search space of PDCCH, the transmission plan of configuration PDSCH.
5. data transfer method in the described cluster multi call according to claim 4, it is characterized in that, the transmission plan of described configuration PDSCH comprises: judge whether Physical Broadcast Channel PBCH antenna port number is 1, if, the configuration transmission plan is that single antenna port and port are 0, otherwise the configuration transmission plan is transmit diversity.
6. data transfer method in the described cluster multi call according to claim 1 is characterized in that, during transmission trunking group-calling service data, the DCI of described transmission after by sign scrambling encapsulation comprises: send by the DCI after the encapsulation of group calling sign G-RNTI scrambling.
7. data transfer method in the described cluster multi call according to claim 6 is characterized in that, the DCI of described transmission after by the encapsulation of G-RNTI scrambling comprises: the CRC check information bit with the DCI of G-RNTI after to encapsulation is carried out scrambling, obtains the DCI of scrambling encapsulation; The DCI that sends the scrambling encapsulation in public search space and the exclusive search volume of UE of PDCCH, the transmission plan of configuration PDSCH.
8. data transfer method in the described cluster multi call according to claim 7 is characterized in that, the transmission plan of described configuration PDSCH comprises: when the transmission mode of UE is pattern 1, the configuration transmission plan is that single antenna port and port are 0; When the transmission mode of UE one of is pattern 2 to the pattern 8, the configuration transmission plan is transmit diversity.
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| CN104104636A (en) * | 2013-04-02 | 2014-10-15 | 上海贝尔股份有限公司 | Method of configuring physical resources for PBCH based on DM-RS demodulation |
| WO2014194748A1 (en) * | 2013-06-08 | 2014-12-11 | 中兴通讯股份有限公司 | Method and device for transmission and reception of cluster public lands mobile network information |
| CN104244191A (en) * | 2013-06-14 | 2014-12-24 | 中国普天信息产业股份有限公司 | Method for controlling retransmission of group calling data |
| CN104244458A (en) * | 2013-06-14 | 2014-12-24 | 中国普天信息产业股份有限公司 | Cluster service data demodulation method in TD-LTE cluster communication system |
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| CN113141578A (en) * | 2020-01-19 | 2021-07-20 | 大唐移动通信设备有限公司 | MCS (modulation and coding scheme) adjusting method and device for cluster group call service |
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| CN104104636B (en) * | 2013-04-02 | 2017-08-25 | 上海贝尔股份有限公司 | The method for configuring physical resource for the PBCH demodulated based on DM RS |
| CN104104636A (en) * | 2013-04-02 | 2014-10-15 | 上海贝尔股份有限公司 | Method of configuring physical resources for PBCH based on DM-RS demodulation |
| WO2014194748A1 (en) * | 2013-06-08 | 2014-12-11 | 中兴通讯股份有限公司 | Method and device for transmission and reception of cluster public lands mobile network information |
| CN104244191A (en) * | 2013-06-14 | 2014-12-24 | 中国普天信息产业股份有限公司 | Method for controlling retransmission of group calling data |
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| CN105635990A (en) * | 2014-11-06 | 2016-06-01 | 北京信威通信技术股份有限公司 | Method for transmitting short messages and status messages of LTE cluster group calling |
| WO2016074250A1 (en) * | 2014-11-15 | 2016-05-19 | Panasonic Intellectual Property Corporation Of America | Resource scheduling method, resource determining method, enodeb and user equipment |
| CN107733592A (en) * | 2016-08-10 | 2018-02-23 | 华为技术有限公司 | Transmission plan indicating means, data transmission method, apparatus and system |
| CN107733592B (en) * | 2016-08-10 | 2020-11-27 | 华为技术有限公司 | Transmission scheme indication method, data transmission method, device and system |
| CN113141578A (en) * | 2020-01-19 | 2021-07-20 | 大唐移动通信设备有限公司 | MCS (modulation and coding scheme) adjusting method and device for cluster group call service |
| CN113141578B (en) * | 2020-01-19 | 2022-06-10 | 大唐移动通信设备有限公司 | MCS (modulation and coding scheme) adjusting method and device for cluster group call service |
| WO2021163890A1 (en) * | 2020-02-18 | 2021-08-26 | 华为技术有限公司 | Communication method, communication apparatus and computer-readable storage medium |
| CN113365350A (en) * | 2020-03-06 | 2021-09-07 | ***通信有限公司研究院 | Information indication method, device, equipment and storage medium |
| CN113365350B (en) * | 2020-03-06 | 2023-09-22 | ***通信有限公司研究院 | Information indication method, device, equipment and storage medium |
| CN115474160A (en) * | 2021-06-11 | 2022-12-13 | 普天信息技术有限公司 | Indication method and device for cluster system message update |
| CN115474160B (en) * | 2021-06-11 | 2024-02-27 | 普天信息技术有限公司 | Indication method and device for cluster system message update |
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