CN102892083B - The transmission method of data in a kind of cluster multi call - Google Patents
The transmission method of data in a kind of cluster multi call Download PDFInfo
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- CN102892083B CN102892083B CN201110200591.3A CN201110200591A CN102892083B CN 102892083 B CN102892083 B CN 102892083B CN 201110200591 A CN201110200591 A CN 201110200591A CN 102892083 B CN102892083 B CN 102892083B
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Abstract
The transmission method of data in a kind of cluster multi call, the method comprises: base station eNB is in physical downlink control channel PDCCH, by the cluster multi call transmission private downlink control information DCI format encapsulation DCI pre-set, and send the DCI after being encapsulated by mark scrambling; Terminal UE detects PDCCH, the Physical Downlink Shared Channel PDSCH that demodulation is corresponding with PDCCH.After the application embodiment of the present invention, group-calling service data can be transmitted on PDSCH, realize the transmission of the group service of point-to-multipoint.
Description
Technical field
The present invention relates to communication technical field, more specifically, relate to the transmission method of data in a kind of cluster multi call.
Background technology
Cluster multi call business is a kind of point-to-multipoint business, plays huge effect in specialized communication field.At present, the digital clustering communication system that domestic application has cluster multi call business more widely has TErrestrial TRunked Radio (TETRA), integrated digital enhancement network (iDEN), global open type cluster topology (GoTa) and 800MHz based on the cluster (GT800) etc. of GSM technology, and these systems are all based on GSM technology or CDMA technology.
TD-LTE technology is new generation broadband mobile communication wireless access technology, the features such as compared with the wireless access technology of existing 2G, 3G mobile communication system, it has, and transmission rate is high, propagation delay time is little, high QoS guarantee.Technical at existing TD-LTE, increasing group service, is the developing direction of trunked communication system.
According to the regulation of LTE protocol, user (UE) is when downlink data receiving, in order to effectively utilize the resource of control area, reducing the expense of signaling, adopting the mode of Physical Downlink Control Channel (PDCCH) blind check to obtain Downlink Control Information (DCI).Then, UE according to the DCI in the PDCCH received, the Physical Downlink Shared Channel (PDSCH) that demodulation is corresponding with PDCCH.
PDCCH blind check be UE do not know the DCI format that current PDCCH carries and the resource location that takies time, tentative decoding is carried out to various possible DCI format and the resource location that may take.If the information bit cyclic redundancy check (CRC) code (CRC) after decoding is identical with the CRC carried in PDCCH, then think that information bit that current PDCCH carries is exactly the DCI of current transmission.The set of the PDCCH resource of blind check is PDCCH search space, is divided into public search space and the exclusive search volume of UE.Wherein, public search space is the set of the PDCCH resource that all must detect for all UE.The exclusive search volume of UE is the set that each UE self needs the PDCCH resource detected.Public search space can be overlapping with the exclusive search volume of UE.
Based on the wideband digital trunked communication system of 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, as voice group call service, voice individual calling, visual group calling, visual individual calling, broadcast & call, real-time video transmission etc.
But, not yet consider the group service of point-to-multipoint in the specification of LTE system, do not provide in current LTE protocol and how to use PDSCH to realize the transmission of cluster multi call business.
Summary of the invention
The embodiment of the present invention proposes the transmission method of data in a kind of cluster multi call, at PDSCH transmitting data, can realize the group service of point-to-multipoint.
The technical scheme of the embodiment of the present invention is as follows:
A transmission method for data in cluster multi call, the method comprises:
Base station eNB, in physical downlink control channel PDCCH, by the cluster multi call transmission private downlink control information DCI format encapsulation DCI pre-set, and sends the DCI after being encapsulated by mark scrambling;
Terminal UE detects PDCCH, the Physical Downlink Shared Channel PDSCH that demodulation is corresponding with PDCCH.
Described DCI format comprises: the flag of centralised allocation or the flag of distributed allocation, resource block assignments and modulation coding mode.
During transmission trunking paging control information, described transmission by identify scrambling encapsulate after DCI comprise: send and identify the DCI after the encapsulation of TP-RNTI scrambling by clustered paging.
Described transmission is comprised by the DCI after the encapsulation of TP-RNTI scrambling: carry out scrambling with the CRC check information bit of TP-RNTI to the DCI after encapsulation, obtain the DCI of scrambling encapsulation; The DCI of scrambling encapsulation is sent, the transmission plan of configuration PDSCH at the public search space of PDCCH.
The transmission plan of described configuration PDSCH comprises: judge whether Physical Broadcast Channel PBCH antenna port number is 1, and if so, configuration transmission plan is single antenna port and port is 0, otherwise configuration transmission plan is transmit diversity.
During transmission trunking group-calling service data, described transmission by identify scrambling encapsulate after DCI comprise: send and identify the DCI after the encapsulation of G-RNTI scrambling by group calling.
Described transmission is comprised by the DCI after the encapsulation of G-RNTI scrambling: carry out scrambling with the CRC check information bit of G-RNTI to the DCI after encapsulation, obtain the DCI of scrambling encapsulation; At the public search space of PDCCH and the DCI of UE exclusive search volume transmission scrambling encapsulation, the transmission plan of configuration PDSCH.
The transmission plan of described configuration PDSCH comprises: when the transmission mode of UE is pattern 1, and configuration transmission plan is single antenna port and port is 0; When the transmission mode of UE is one of in pattern 2 to pattern 8, configuration transmission plan is transmit diversity.
As can be seen from technique scheme, in embodiments of the present invention, base station (eNB), on PDCCH, transmits special DCI format encapsulation DCI by the cluster multi call pre-set, and sends the DCI after being encapsulated by mark scrambling; UE detects PDCCH, the PDSCH that demodulation is corresponding with PDCCH.Transmit special DCI format by the cluster multi call pre-set, at PDSCH transmitting data, the group service of point-to-multipoint can be realized.
Accompanying drawing explanation
Fig. 1 is the transmission method schematic flow sheet of data in embodiment of the present invention cluster multi call.
Embodiment
Express clearly clear for making the object, technical solutions and advantages of the present invention, below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
In embodiments of the present invention, when PDSCH transmits cluster multi call data, after eNB transmits the encapsulation of special DCI format by the cluster multi call pre-set on PDCCH, and send the DCI after being encapsulated by mark scrambling; UE detects PDCCH, and then the PDSCH that demodulation is corresponding with PDCCH.According to the feature of cluster multi call business, cross the cluster multi call pre-set and transmit special DCI format, at PDSCH transmitting data, the group service of point-to-multipoint can be realized, ensure the normal operation of the various function of LTE system itself simultaneously.
See the transmission method schematic flow sheet that accompanying drawing 1 is data in cluster multi call, specifically comprise the following steps:
Step 101, eNB, on PDCCH, transmit special DCI format encapsulation DCI by the cluster multi call pre-set.
Before PDSCH transmits cluster multi call business datum, eNB transmits special DCI format encapsulation DCI by the cluster multi call pre-set on PDCCH.Specifically comprise step 102 and step 103 two kinds of situations.
Be point multipoint message traffic due to cluster multi call business and do not support hybrid automatic repeat-request (HARQ), if existing DCI format has a lot of redundant information in use LTE protocol, as transmission power control (TPC) instruction etc. on HARQ process number, new data instruction, redundancy versions, Physical Uplink Control Channel (PUCCH), cause unnecessary PDCCH expense.So according to the feature of cluster multi call, cluster multi call transmits special DCI format, does not have redundant information to save bit number, add the reliability of transmission when using same asset transmission.
See table 1, the DCI format corresponding to 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 represented with the form of 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/DistributedVRBassignmentflag), what be used to indicate the employing of current PDSCH transmission is localized virtual resource block or distributed virtual resource block, and the resource mapping method of its PDSCH is different.
Resource block assignments (Resourceblockassignment), is used to indicate the physical resource position shared by PDSCH.
Modulation coding mode (Modulationandcodingscheme), is used to indicate the modulation coding mode of PDSCH transmission.
Table 1DCI form
Step 102, eNB send the DCI after being encapsulated by TP-RNTI scrambling on PDCCH.
When transmission trunking paging control information, carry out scrambling with the CRC check information bit of TP-RNTI to the DCI after encapsulation, obtain the DCI of scrambling encapsulation; The DCI of scrambling encapsulation is sent, the transmission plan of configuration PDSCH at the public search space of PDCCH
Give the transmission plan of configuration PDSCH in table 2: judge whether Physical Broadcast Channel (PBCH) antenna port number is 1, if so, transmission plan configures single antenna port and port is 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 being randomly dispersed in community, so may there is very large difference in cluster multi call user channel quality separately, particularly when cell coverage area may very large time, distance base station cluster multi call user profile quality far away may be very poor.In order to ensure the service quality of cluster multi call business, the transmission plan that cluster multi call business adopts is single-input single-output (SISO) scheme or emission diversity scheme.SISO scheme, i.e. single-input single-output, send for single antenna.Emission diversity scheme is multiple antennas send mode, and it is conducive to anti-fading, and improves the reliability of link.
UE in cluster group is when carrying out PDSCH and receiving, and high-rise configuration UE, descrambling carries out the PDCCH of CRC scrambling by TP-RNTI.UE is according to the configuration demodulation PDCCH in table 2 and corresponding PDSCH, and the PDSCH that PDCCH is corresponding therewith carries out scrambler initialization by TP-RNTI.
Step 103, eNB send the DCI after being encapsulated by G-RNTI scrambling on PDCCH.
When transmission trunking group-calling service data, eNB sends the DCI by G-RNTI scrambling on PDCCH.Concrete, carry out scrambling with the CRC check information bit of G-RNTI to the DCI after encapsulation, obtain the DCI of scrambling encapsulation; At the public search space of PDCCH and the DCI of UE exclusive search volume transmission scrambling encapsulation, the transmission plan of configuration PDSCH.
The transmission plan of PDSCH is given: the transmission plan for UE is determined according to the transmission mode of UE and DCI format in table 3.When the transmission mode of UE is pattern 1 and DCI format is DCI format in table 1, the transmission plan of UE adopts single antenna port and port is 0; When the transmission mode of UE is one of in pattern 2 to pattern 8 and DCI format is DCI format in table 1, the transmission plan of UE adopts transmit diversity.
The PDSCH configuration that table 3G-RNTI is corresponding
In Rel-9 agreement, give 8 kinds of transmission modes, provide corresponding transmission plan under often kind of transmission mode to complete corresponding function.Transmission plan comprises single antenna port, transmit diversity, Open-Loop Spatial Multiplexing, Closed-Loop Spatial Multiplexing, multiuser MIMO etc.
In fact, can be found out by table 3, the transmission plan of UE can directly be determined according to the transmission mode of UE, but in order to consider extensibility, if UE increases other transmission plan under same transmission mode, just also need to determine transmission plan by DCI format.
And the UE in cluster group is when carrying out PDSCH and receiving, the transmission mode of high-rise configuration UE, descrambling carries out the PDCCH of CRC scrambling by G-RNTI.UE is according to configuration demodulation PDCCH corresponding in table 3 and all corresponding PDSCH, and the PDSCH that PDCCH is corresponding therewith carries out scrambler initialization by G-RNTI.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the transmission method of data in cluster multi call, it is characterized in that, the method comprises:
Base station eNB, in physical downlink control channel PDCCH, by the cluster multi call transmission private downlink control information DCI format encapsulation DCI pre-set, and sends the DCI after being encapsulated by clustered paging mark TP-RNTI or group calling mark G-RNTI scrambling;
Terminal UE detects PDCCH, the Physical Downlink Shared Channel PDSCH that demodulation is corresponding with PDCCH;
Described DCI format is made up of such as lower part: the flag of centralised allocation or the flag of distributed allocation, resource block assignments and modulation coding mode.
2. the transmission method of data in cluster multi call according to claim 1, it is characterized in that, described transmission is comprised by the DCI after the encapsulation of TP-RNTI scrambling: carry out scrambling with the CRC check information bit of TP-RNTI to the DCI after encapsulation, obtain the DCI of scrambling encapsulation; The DCI of scrambling encapsulation is sent, the transmission plan of configuration PDSCH at the public search space of PDCCH.
3. the transmission method of data in cluster multi call according to claim 2, 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, configuration transmission plan is single antenna port and port is 0, otherwise configuration transmission plan is transmit diversity.
4. the transmission method of data in cluster multi call according to claim 1, it is characterized in that, described transmission is comprised by the DCI after the encapsulation of G-RNTI scrambling: carry out scrambling with the CRC check information bit of G-RNTI to the DCI after encapsulation, obtain the DCI of scrambling encapsulation; At the public search space of PDCCH and the DCI of UE exclusive search volume transmission scrambling encapsulation, the transmission plan of configuration PDSCH.
5. the transmission method of data in cluster multi call according to claim 4, it is characterized in that, the transmission plan of described configuration PDSCH comprises: when the transmission mode of UE is pattern 1, and configuration transmission plan is single antenna port and port is 0; When the transmission mode of UE is one of in pattern 2 to pattern 8, configuration transmission plan is transmit diversity.
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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 |
| CN104244194A (en) * | 2013-06-08 | 2014-12-24 | 中兴通讯股份有限公司 | Transmitting and receiving method and device for cluster public land mobile network information |
| CN104244191B (en) * | 2013-06-14 | 2018-04-13 | 中国普天信息产业股份有限公司 | A kind of control group exhales the method that Data duplication transmits |
| CN104244458B (en) * | 2013-06-14 | 2017-12-08 | 中国普天信息产业股份有限公司 | A kind of method of group service demodulating data in TD LTE trunked communication systems |
| CN104683990B (en) * | 2013-11-28 | 2019-04-05 | 北京信威通信技术股份有限公司 | A kind of methods, devices and systems of wireless coverage |
| 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 |
| JP6557878B2 (en) * | 2014-11-15 | 2019-08-14 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ | COMMUNICATION DEVICE, COMMUNICATION METHOD, AND INTEGRATED CIRCUIT |
| 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 |
| 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 |
| CN113365350B (en) * | 2020-03-06 | 2023-09-22 | 中国移动通信有限公司研究院 | Information indication method, device, equipment and storage medium |
| CN112583525A (en) * | 2020-11-16 | 2021-03-30 | 北京光宇之勋科技有限公司 | Method and system for transmitting electronic commerce information to multiple mobile terminals |
| 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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