CN105307154A - Terminal report method based on TD-LTE cluster system - Google Patents
Terminal report method based on TD-LTE cluster system Download PDFInfo
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- CN105307154A CN105307154A CN201410359384.6A CN201410359384A CN105307154A CN 105307154 A CN105307154 A CN 105307154A CN 201410359384 A CN201410359384 A CN 201410359384A CN 105307154 A CN105307154 A CN 105307154A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
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Abstract
The invention provides a terminal report method based on a TD-LTE cluster system. The method comprises the steps that: in a competitive random access process, a user UE sends first scheduling of uplink transmission to a base station eNB; and the eNB determines the power level of the UE according to the first time scheduling of uplink transmission. By using the terminal report method provided by the embodiment of the invention, a network side can obtain the power level of the terminal in time.
Description
Technical field
The application relates to communication technical field, more specifically, relates to a kind of terminal to report method based on TD-LTE group system.
Background technology
TD-LTE technology is new generation broadband mobile communication wireless access technology, compared with the wireless access technology of existing 2G, 3G mobile communication system, has the features such as transmission rate is high, propagation delay time is little, high QoS guarantee.Technical at existing TD-LTE, increase the characteristic of group service, realize the developing direction that TD-LTE wideband digital trunked communication system is trunked communication system.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.
Trunked communication system is developed for meeting industry command scheduling demand, towards the private wireless communication system of multiple sector application.Trunked communication system has a wide range of applications in public safety, communications and transportation, government utility, petrochemical industry, industry and commerce and army.Some sector applications need still can carry out speed larger business when colony terminal shadow region in the cell or cell edge, and will ensure the service quality of this colony terminal.Under the prerequisite not changing existing network deployment, the peak power output that can increase UE obtains higher data throughout.At present, based on the wideband digital trunked communication system of TD-LTE technology, the peak power output of existing colony terminal follows 3GPPLTE agreement, the requirement of the terminal of current defined power grade 3 is the peak power outputs in channel width under any transmitted bandwidth is 23dBm, and this terminal is called LTE standard power colony terminal.
In LTE protocol, specify that the power of TD-LTE terminal (UE) has 4 grades.The current requirement that define only power grade 3, require that, for all TDD frequency ranges, the peak power output in channel width under any transmitted bandwidth is 23dBm, tolerance limit is 2dB.
That is, only there is a kind of terminal of power grade in current LTE system, and the power grade information of terminal is not report network side.And be the terminal that the demand meeting industry customer has multiple different capacity grade based on TD-LTE trunked communication system.It is need to know terminal power class information that network side carries out RRM.For this reason, there is the problem that network side cannot know the power grade of terminal in prior art.
Summary of the invention
The embodiment of the present invention proposes a kind of terminal to report method based on TD-LTE group system, and network side can know the power grade of terminal in time.
The technical scheme of inventive embodiments is as follows:
Based on a terminal to report method for TD-LTE group system, described method comprises:
In competition random access procedure, user UE sends first time scheduling of upstream transmissions to base station eNB;
ENB determines the power grade of UE according to described first time scheduling of upstream transmissions.
Described UE sends scheduling of upstream transmissions for the first time to eNB and comprises: UE sends the first time scheduling of upstream transmissions not comprising UE power grade to eNB;
According to described first time scheduling of upstream transmissions, described eNB determines that the power grade of UE comprises: according to described first time scheduling of upstream transmissions, eNB determines that the power grade of UE is power grade 3.
Described UE sends scheduling of upstream transmissions for the first time to eNB and comprises:
UE is on Common Control Channel CCCH channel, sent the first time scheduling of upstream transmissions comprising colony terminal capability report medium access control MAC Control Element to eNB by protocol Data Unit MACPDU, described colony terminal capability report MAC Control Element comprises UE power grade.
Described MACPDU comprises: colony terminal capability report MAC Control Element and LCID are the SDU of 00000 correspondence.
Described first time, scheduling of upstream transmissions comprised radio resource control RRC connection request message or RRC connection reconstruction request message further.
Described UE is high-power terminal, and described UE is further used for triggered clusters terminal capability report MAC Control Element.
As can be seen from technique scheme, due in competition random access procedure, UE sends first time scheduling of upstream transmissions to eNB; ENB just can determine the power grade of UE according to described first time scheduling of upstream transmissions.Such network side can know the power grade of terminal in time.
Accompanying drawing explanation
Fig. 1 is competitive mode random access procedure schematic diagram;
Fig. 2 is the terminal to report schematic flow sheet based on TD-LTE group system;
Fig. 3 is colony terminal capability report MAC Control Element structural representation.
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 the embodiment of the present invention, in competition random access procedure, UE sends first time scheduling of upstream transmissions to eNB; ENB determines the power grade of UE again according to described first time scheduling of upstream transmissions.If do not have UE power grade in scheduling of upstream transmissions for the first time, then eNB gives tacit consent to the power grade of UE is power grade 3; If have UE power grade in scheduling of upstream transmissions for the first time, then eNB determines the power grade of UE according to first time scheduling of upstream transmissions.Such network side can know the power grade of terminal in time.
Wireless heterogeneous networks (RRC) connection management is a unusual critical process in RRC, it mainly comprise RRC connection itself foundation, safeguard release and modification process, also comprise the parameter configuration and control procedure that utilize RRC to connect to carry out.When the UE being in free time (RRC_Idle) state wishes initiation one calling or response paging, RRC connection establishment process can be triggered.When being in RRC connection status but occur extremely needing to recover RRC connection, UE can trigger RRC connection re-establishment process.The random access procedure that these lower layer entities that all can trigger UE are at war with.From the angle of Stochastic accessing, under initially accessing the scene of (i.e. RRC connection reconstruction) after initially accessing (i.e. RRC connection establishment) or Radio Link Failure in rrc-idle state, the Stochastic accessing of the autonomous trigger competition of UE.ENB does not distribute special Preamble code for the UE of competition Stochastic accessing, but the Stochastic accessing that UE Stochastic choice Preamble code is also initiated.
Be competitive mode random access procedure schematic diagram see accompanying drawing 1, the random access procedure competed in LTE system mainly comprises four steps:
101, UE Stochastic choice Stochastic accessing Preamble code (Msg1) in uplink random accesses channel (PRACH) sends.
102, eNB is at the accidental access response (Msg2) of downlink shared transmission channel (DL-SCH) upper transmission MAC layer generation.
103, UE is in the upper transmission of up shared transmission channel (UL-SCH) first time scheduling of upstream transmissions (Msg3) first.
After UE correctly receives Msg2, be that its ascending resource distributed transmits Msg3 according to uplink authorization in accidental access response.HARQ procedure is supported in the transmission of Msg3 message, and agreement specifies that the ascending resource that eNB distributes at least should support that net load is the information transmission of 56bit.
For different scenes, in Msg3, comprise different contents.
1) initially access: carry the RRC connection request message that rrc layer generates, do not comprise NAS message.
2) connection reconstruction: carry the RRC connection reconstruction request message that rrc layer generates, do not comprise NAS message.
3) switch: the RRC handoff completion message that transmission rrc layer generates and the C-RNTI of UE, when resource allows can while reporting transmission buffering state.
4) other scenes: the C-RNTI at least transmitting UE.
104, eNB is at DL-SCH channel contention resolved information (Msg4).
Consider in the present invention that competition random access procedure by carrying the power grade information of user in Msg3, network side can earlier know terminal maximum transmission power, thus carries out power control to terminal better.In addition, along with the continuous propelling of LTE protocol version, reserved place before may be used in redaction.Like this, the reserved place that can take with trunked communication system air interface design scheme clashes.Broadband cluster communication system carries out evolution on LTE basis, if carry the power grade information of user by the reserved place of certain cell in RRC agreement, the possibility clashed in the future with LTE protocol is larger.Mutual between UE and eNB, send the power grade carrying UE in the process of Msg3 to eNB at UE, such eNB just directly can know the power grade of UE.
Technical scheme of the present invention: in the group system based on TD-LTE technology, for high-power cluster terminal, increases the content of carry information newly, is used to indicate the power grade of terminal in competitive mode random access procedure in Msg3; This information content is not increased for LTE standard power colony terminal and standard LTE terminal.After eNB receives Msg3, by whether carrying the power grade that UE power grade judges terminal in Msg3.
See the terminal to report method flow schematic diagram that accompanying drawing 2 is based on TD-LTE group system, specifically comprise the following steps:
201, in competition random access procedure, UE sends first time scheduling of upstream transmissions to eNB.
If UE does not comprise UE power grade information in eNB sends first time scheduling of upstream transmissions, then illustrate that the power grade of this UE is defaulted as power grade 3.
If UE comprises UE power grade information to the first time scheduling of upstream transmissions that eNB sends, then illustrate that this UE is high-power cluster terminal.
For high-power cluster terminal, newly-increased colony terminal capability report MAC Control Element, for report set group terminal ability information, comprises UE power grade.Identified by the sub-head of MACPDU carrying LCID based on colony terminal capability report MAC Control Element in TD-LTE trunked communication system.The field of colony terminal power grade is comprised in colony terminal capability report MAC Control Element.
Colony terminal capability report is with the Form generation of MAC Control Element.MAC Control Element is included in protocol Data Unit (MACPDU) and sends to eNB by UE.Each UE TB block can only transmit at most a MACPDU.A MACPDU comprises a MAC head, zero or multiple service data unit (MACSDU), zero or multiple MAC Control Element, and random filling part.
A MACPDU head comprises the sub-head of one or more MACPDU; Every height head corresponds to a MACSDU or MAC Control Element or filling part.
When LCID in MACPDU is 00000, namely MACPDU is carried on CCCH channel, and the SDU that can be 00000 correspondence by colony terminal capability report MAC Control Element and LCID forms a MACPDU, and sends to eNB.Now, colony terminal capability report MAC Control Element is added in Msg3.
Because initially accessing the competitive mode Stochastic accessing carried out, in Msg3, carry the RRC connection request message (RRCConnectionRequest) that rrc layer generates; Because of the competitive mode Stochastic accessing of connection reconstruction, in Msg3, carry the RRC connection reconstruction request message (RRCConnectionReestablishmentRequest) that rrc layer generates.These message are carried on CCCH channel.
202, eNB determines the power grade of UE according to described first time scheduling of upstream transmissions.
Do not comprise the first time scheduling of upstream transmissions of UE power grade when UE sends to eNB, according to described first time scheduling of upstream transmissions, eNB determines that the power grade of UE is power grade 3.
When UE is on CCCH channel, send the first time scheduling of upstream transmissions comprising colony terminal capability report MAC Control Element to eNB, colony terminal capability report MAC Control Element comprises UE power grade.ENB knows the power grade of terminal according to UE power grade in colony terminal capability report MAC Control Element.
For the ease of understanding, below in conjunction with specific embodiment, technical scheme of the present invention is described.
Comprise the field of colony terminal power grade based on colony terminal capability report form in TD-LTE trunked communication system, field length can be determined according to colony terminal power grade kind number.Be 3bits for colony terminal power grade field length below, provide colony terminal capability report form, as shown in Figure 3.Table 1 is colony terminal power grade.Wherein, PowerClass territory is colony terminal power grade field, is used to indicate the power grade of colony terminal, and field length is 3bits; R is reserved.
Table 1
| Index | Power Class |
| 0 | Power grade 1 |
| 1 | Power grade 2 |
| 2 | Power grade 3 |
| … | … |
| 6 | Power grade 7 |
| 7 | Power grade 8 |
When UE is high-power terminal, and when MACPDU comprises SDU corresponding to CCCH, will the transmission of triggered clusters terminal capability report.The SDU that colony terminal capability report MAC Control Element and LCID are 00000 correspondence is formed a MACPDU by UE, and sends to eNB.Now, colony terminal capability report MAC Control Element is added in Msg3.
ENB can according to receiving the power grade that Msg3 determines this terminal.MACPDU corresponding for Msg3 carries out splitting and demultiplexing by eNB, if do not comprise colony terminal capability report MAC Control Element in this MACPDU, eNB thinks that the power grade of this terminal is 3; If comprise colony terminal capability report MAC Control Element in this MACPDU, eNB knows the power grade of this terminal according to UE power grade in colony terminal capability report MAC Control Element.Like this, eNB can know the power grade of terminal, then knows the maximum transmission power of this terminal according to the power grade of terminal.ENB is in conjunction with UE power grade, can better for user carries out Resourse Distribute and power controls, reduce presence of intercell interference as much as possible, more limited in reasonable distribution and effective management cluster communication system Radio Resource, makes systematic function and capacity reach associating optimum state.
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 (6)
1. based on a terminal to report method for TD-LTE group system, it is characterized in that, described method comprises:
In competition random access procedure, user UE sends first time scheduling of upstream transmissions to base station eNB;
ENB determines the power grade of UE according to described first time scheduling of upstream transmissions.
2. according to claim 1 based on the terminal to report method of TD-LTE group system, it is characterized in that, described UE sends scheduling of upstream transmissions for the first time to eNB and comprises: UE sends the first time scheduling of upstream transmissions not comprising UE power grade to eNB;
According to described first time scheduling of upstream transmissions, described eNB determines that the power grade of UE comprises: according to described first time scheduling of upstream transmissions, eNB determines that the power grade of UE is power grade 3.
3. according to claim 1 based on the terminal to report method of TD-LTE group system, it is characterized in that, described UE sends scheduling of upstream transmissions for the first time to eNB and comprises:
UE is on Common Control Channel CCCH channel, sent the first time scheduling of upstream transmissions comprising colony terminal capability report medium access control MAC Control Element to eNB by protocol Data Unit MACPDU, described colony terminal capability report MAC Control Element comprises UE power grade.
4. according to claim 3 based on the terminal to report method of TD-LTE group system, it is characterized in that, described MACPDU comprises: colony terminal capability report MAC Control Element and LCID are the SDU of 00000 correspondence.
5., according to claim 3 based on the terminal to report method of TD-LTE group system, it is characterized in that, described first time scheduling of upstream transmissions comprise radio resource control RRC connection request message or RRC connection reconstruction request message further.
6. according to claim 3 based on the terminal to report method of TD-LTE group system, it is characterized in that, described UE is high-power terminal, and described UE is further used for triggered clusters terminal capability report MAC Control Element.
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| CN201410359384.6A CN105307154B (en) | 2014-07-25 | 2014-07-25 | A kind of terminal report method based on TD-LTE group system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107438232A (en) * | 2016-05-25 | 2017-12-05 | 大唐移动通信设备有限公司 | A kind of cluster group UE service condition report and acquisition methods, device |
| CN109804677A (en) * | 2016-09-29 | 2019-05-24 | 株式会社Ntt都科摩 | User apparatus and base station |
| WO2020029766A1 (en) * | 2018-08-07 | 2020-02-13 | 维沃移动通信有限公司 | Random access method and terminal device |
| CN114270954A (en) * | 2019-08-23 | 2022-04-01 | 索尼集团公司 | Multiple power class operation |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107438232A (en) * | 2016-05-25 | 2017-12-05 | 大唐移动通信设备有限公司 | A kind of cluster group UE service condition report and acquisition methods, device |
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| CN109804677B (en) * | 2016-09-29 | 2022-01-18 | 株式会社Ntt都科摩 | User device and base station |
| WO2020029766A1 (en) * | 2018-08-07 | 2020-02-13 | 维沃移动通信有限公司 | Random access method and terminal device |
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| KR102589688B1 (en) | 2018-08-07 | 2023-10-13 | 비보 모바일 커뮤니케이션 컴퍼니 리미티드 | Random access method and terminal device |
| CN114270954A (en) * | 2019-08-23 | 2022-04-01 | 索尼集团公司 | Multiple power class operation |
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