CN101541036B - Working method and system of enhanced long-term evolution system terminal - Google Patents
Working method and system of enhanced long-term evolution system terminal Download PDFInfo
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- CN101541036B CN101541036B CN200910135590.8A CN200910135590A CN101541036B CN 101541036 B CN101541036 B CN 101541036B CN 200910135590 A CN200910135590 A CN 200910135590A CN 101541036 B CN101541036 B CN 101541036B
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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
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a working method and a working system of an enhanced long-term evolution system terminal, comprising: the enhanced long-term evolution system terminal in a connected state works independently on a non-backward compatible carrier wave without the information support on a backward compatible carrier wave. The method is simple and effective; when transmitting data on a non-backward compatible composition carrier wave, an LTE-A terminal can work independently on one composition carrier wave of such type, without monitoring other composition carrier waves, thus being capable of providing a flexible work mechanism for the LTE-A terminal and also being conducive to the power saving of the LTE-A terminal; and the LTE-A terminal resides only on the backward compatible carrier wave when in idle state, the working mode simply and effectively resolves the problem that the downlink composition carrier wave is not clear in the process of random access. And the method has smaller effect on protocol modification.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to the method for work and system that strengthen LTE-A terminal in Long Term Evolution (Long Term Evolution-Advanced is called for short LTE-A) system.
Background technology
Along with the development of mobile industry, and user is to the continuous growth of mobile data services demand, the requirement of people to the speed of mobile communication and service quality (Qos) is more and more higher, so at 3G (Third Generation) Moblie (3rd Generation, be called for short 3G) also there is no extensive commercialization before, person skilled has just started the research-and-development activity to next generation mobile communication system, wherein more typically third generation partner program (3rd Generation Partnership Project, be called for short 3GPP) Long Term Evolution (the Long Term Evolution that starts, be called for short LTE) project, the available maximum spectrum bandwidth of LTE system is 20MHz (megahertz).Along with the further evolution of network, lte-a system, as the evolution system of LTE system, can provide the spectral bandwidth up to 100MHz, supports more flexible higher-quality communication, will possess good backwards compatibility simultaneously to LTE system.In lte-a system, have multiple component carrier (CC, Component Carrier), LTE-A terminal may be simultaneously operated on one or more component carrier, and a LTE terminal can only be operated on the component carrier of some backward compatibility.
In standard discussion in early stage of lte-a system, discuss and can support the asymmetrical situation of up-downgoing component carrier number.Generally speaking, in the configuration of system, descending component carrier number is greater than uplink component carrier number.In the asymmetrical situation of up-downgoing component carrier number, after subscriber equipment sends random access channel preamble sequence in uplink component carrier, which strengthen base station not know to send random access channel responses on descending component carrier of uplink component carrier pairing therewith, descending component carrier indefinite (or being called ambiguity) problem is also existed for wireless heterogeneous networks (Radio Resource Control is called for short RRC) the connection establishment message (message 4) in subsequent process.
In standard [TS 36.101 840] version, add and LTE terminal received and sends the restriction of frequency interval of data.The reception of LTE terminal in each frequency band and the centre frequency interval sending data need meet the requirement shown in following table:
| Frequency band | Transmitting-receiving centre carrier frequency interval |
| 1 | 190MHz |
| 2 | 80MHz. |
| 3 | 95MHz. |
| 4 | 400MHz |
| 5 | 45MHz |
| 6 | 45MHz |
| 7 | 120MHz |
| 8 | 45MHz |
| 9 | 95MHz |
| 10 | 400MHz |
| 11 | 48MHz |
| 12 | 30MHz |
| 13 | -31MHz |
| 14 | -30MHz |
| 17 | 30MHz |
In the asymmetrical situation of up-downgoing component carrier number, all descending component carriers all can not be configured to backward compatibility, for the uplink component carrier that LTE terminal is accessible, the descending component carrier centre frequency of its correspondence also just determines, like this, in community during specific asymmetric up-downgoing component carrier number, because LTE terminal cannot work on the transmitting-receiving frequency at non-default interval, so be generally that the descending component carrier of non-default spaced relationship is configured to non-backward compatible carrier waves with uplink component carrier, and be configured to backward compatibility carrier wave by meeting the upper carrier wave showing to limit with uplink component carrier, so, modal situation is, the descending component carrier of the backward compatibility corresponding with a uplink component carrier only has one, the descending component carrier of non-backward compatible corresponding thereto has one or more.On this basis, under the scene that there is non-backward compatible component carrier, how LTE-A terminal works is the problem that needs are determined.
About the working method of LTE-A terminal, need backward compatibility component carrier to coordinate when the proposal of some producers (as Nortel (R1-090762), LG (R1-090779)) relates to requirement connected state LTE-A terminal works and work together.This mode limits the degree of freedom of LTE-A terminal works, and the connected state LTE-A terminal on non-backward compatible component carrier must work together with other backward compatibility component carrier coordinates, and is subject to the restriction of other backward compatibility component carrier.
Qualcomm mentions the resident carrier wave of non-backward compatible and non-backward compatible non-resident carrier concept in relevant criterion (with reference to " Qualcomm Europe; R1-090860; Notion ofanchor carrier in LTE-A; WG1_RL1 meeting 56 "), the former supports the LTE-A terminal of Idle state and connected state, support synchronous/broadcast/paging function, the LTE-A terminal of the latter's only Supporting connectivity state, UE can not reside on such carrier wave, back-up system information updating function, is furnished with new synchronizing signal to keep synchronous.For the resident carrier wave of non-backward compatible, when Idle state LTE-A terminal also can resident time, during the specific asymmetric carrier aggregation in community in initial access process descending component carrier unstructured problem still need solve, the Change impact introduced thus has to be assessed; For non-backward compatible non-resident carrier, LTE-A terminal still needs the cooperation of backward compatibility component carrier to work together when connected state, be subject to the restriction of other backward compatibility component carrier.
Summary of the invention
The technical problem to be solved in the present invention is to provide method of work and the system of enhanced long-term evolution terminal, improves the freedom to work degree of LTE-A terminal and saves terminal electric power resource.
Also deficiency is considered in freedom to work degree, saving power for terminal and the impact on protocol modification for prior art, namely the present invention is under the scene that there is non-backward compatible carrier waves, propose a kind of new LTE-A terminal operating mode, the Change impact having considered the degree of freedom of terminal works, saving power for terminal and agreement gives the LTE-A working method of a kind of connected state and Idle state.
In order to solve the problems of the technologies described above, the invention provides a kind of method of work of enhanced long-term evolution terminal, comprise: the enhanced long-term evolution terminal being in connected state by means of the Informational support on backward compatibility carrier wave, need not work alone in non-backward compatible carrier waves.
Further, above-mentioned method of work can also have following characteristics:
Strengthen the system configuration parameter that base station provides described enhanced long-term evolution terminal to work alone in this non-backward compatible carrier waves in described non-backward compatible carrier waves.
Further, above-mentioned method of work can also have following characteristics:
Described non-backward compatible carrier waves refers to the descending component carrier of non-backward compatible.
Further, above-mentioned method of work can also have following characteristics:
The enhanced long-term evolution terminal being in Idle state only resides on the descending component carrier of backward compatibility.
Further, above-mentioned method of work can also have following characteristics:
After described enhanced long-term evolution terminal carries out initial synchronization operation with described enhancing base station in the rear on com-patible downmix component carrier, the uplink component carrier corresponding with the descending component carrier of described backward compatibility sends random access preamble message, after described enhancing base station receives described random access preamble message, on com-patible downmix component carrier, sends accidental access response in the rear.
Further, above-mentioned method of work can also have following characteristics:
Set up between described enhanced long-term evolution terminal and described enhancing base station in wireless heterogeneous networks connection procedure, described enhancing base station sends wireless heterogeneous networks connection establishment message in the rear on com-patible downmix component carrier.
Further, above-mentioned method of work can also have following characteristics:
After described enhanced long-term evolution terminal transfers Idle state to from connected state, reside on backward compatibility carrier wave.
In order to solve the problems of the technologies described above, present invention also offers a kind of work system of enhanced long-term evolution terminal, comprise enhanced long-term evolution terminal and strengthen base station, described enhanced long-term evolution terminal, for when being in connected state, need not work alone in non-backward compatible carrier waves by means of the Informational support of backward compatibility carrier wave; Described enhancing base station, described non-backward compatible carrier waves provides the system configuration parameter that described enhanced long-term evolution terminal works alone in this non-backward compatible carrier waves.
Further, said system can also have following characteristics:
Described enhanced long-term evolution terminal, also for when being in Idle state, only resides on the descending component carrier of backward compatibility.
Further, said system can also have following characteristics:
Described enhancing base station, also for carrying out initial synchronization operation in the rear on com-patible downmix component carrier with described enhanced long-term evolution terminal, after the uplink component carrier corresponding with the descending component carrier of described backward compatibility receives random access preamble message, on com-patible downmix component carrier, send accidental access response in the rear; And and set up in wireless heterogeneous networks connection procedure between described enhanced long-term evolution terminal, on com-patible downmix component carrier, send wireless heterogeneous networks connection establishment message in the rear.
Method of the present invention is simply effective, LTE-A terminal can work alone on such component carrier when non-backward compatible component carrier transmitting data, other component carrier need not be monitored, can be LTE-A terminal and working mechanism is flexibly provided, also be conducive to the power saving of LTE-A terminal simultaneously, LTE-A terminal only resides in the working method of backward compatibility carrier wave at Idle state, solves the indefinite problem of descending component carrier in random access procedure simply and effectively.And method of the present invention is less to effect on protocol modification.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of LTE-A terminal works method in embodiment;
Fig. 2 is the schematic diagram of uplink component carrier and descending component carrier in specific embodiment.
Embodiment
Method of the present invention is applicable to the lte-a system that there is non-backward compatible component carrier.Such as, when the descending component carrier number of lte-a system is greater than uplink component carrier number, because band configurations transmitting-receiving frequencies different in LTE has different fixed intervals (normative reference TS 36.101 840), when system descending component carrier number is greater than uplink component carrier number, also just there is the situation of non-backward compatible component carrier.
In embodiment, non-backward compatible carrier waves refers to, does not support the carrier wave of LTE terminal in lte-a system.The connected state of LTE-A terminal refers to that LTE-A terminal establishes RRC and connects; The Idle state of LTE-A terminal refers to that LTE-A terminal is not set up RRC and connected.
The work system of LTE-A terminal comprises LTE-A terminal and strengthens base station,
LTE-A terminal, for when being in connected state, need not work alone in non-backward compatible carrier waves by means of the Informational support of backward compatibility carrier wave; Also for when being in Idle state, only reside on the descending component carrier of backward compatibility;
Strengthen base station, described non-backward compatible carrier waves provides the system configuration parameter that described LTE-A terminal works alone in this non-backward compatible carrier waves; Also for carrying out Idle state park operation with LTE-A terminal on the descending component carrier of backward compatibility, after the uplink component carrier corresponding with the descending component carrier of backward compatibility receives random access preamble message, after this, on com-patible downmix component carrier, send accidental access response; And and set up between LTE-A terminal in RRC connection procedure, after this, on com-patible downmix component carrier, send wireless heterogeneous networks connection establishment message.
As shown in Figure 1, the method for work of enhanced long-term evolution terminal comprises:
(1) be in connected state LTE-A terminal to be operated in independently in non-backward compatible carrier waves, do not need the Informational support by means of backward compatibility carrier wave.
Strengthen base station and the connected state LTE-A relevant configuration information that terminal can work alone in this non-backward compatible carrier waves is provided in this non-backward compatible carrier waves, as synchronous/system information/paging etc., connected state LTE-A terminal can be operated in non-backward compatible carrier waves (namely connected state LTE-A terminal can not need cooperation by other backward compatibility carrier wave and Informational support, just can work in this non-backward compatible carrier waves) independently.
In embodiment, the non-backward compatible carrier waves that connected state LTE-A terminal works alone refers to one or more descending non-backward compatible carrier waves.
Be in connected state LTE-A terminal to be operated in independently in non-backward compatible carrier waves, do not need the Informational support by means of backward compatibility carrier wave, then need not monitor other component carrier, be conducive to saving power for terminal.
(2) the LTE-A terminal being in Idle state only resides on backward compatibility carrier wave;
" resident " that be in the LTE-A terminal of Idle state in of the present invention relates to all operations of LTE-A terminal at Idle state, such as, receive broadcast, beep-page message etc.
And LTE-A terminal is resident on backward compatibility carrier wave when community selection or cell reselection, and does not carry out resident in non-backward compatible carrier waves; It is resident to backward compatibility carrier wave when LTE-A terminal forwards Idle state to from connected state.
The LTE-A terminal that system configuration or protocol conventions are in Idle state only resides in after on backward compatibility carrier wave, LTE-A terminal in the random access procedure, its accessible uplink component carrier only corresponds to the descending component carrier of a backward compatibility, the RACH that enhancing base station receives the transmission of LTE-A terminal at a certain up-link carrier is leading, just can know the descending component carrier that terminal initial is resident, so strengthen base station to send the leading response of RACH on com-patible downmix component carrier after this, and in follow-up wireless heterogeneous networks connection procedure, strengthen base station and also after this, on com-patible downmix component carrier, send wireless heterogeneous networks connection establishment message (message 4).Like this, to initial access descending carrier unstructured problem, strengthen base station and need not send accidental access response on all descending component carrier corresponding with uplink component carrier, save system descending resource; And, not needing special selection strategy to select a descending component carrier for sending accidental access response from multiple descending component carrier, simplifying the operation strengthening base station.
The inventive method is further illustrated below with specific embodiment.
As shown in Figure 2,5 descending component carriers are had in this embodiment LTE-A community, 3 uplink component carrier, as shown in Figure 2, wherein backward compatibility component carrier to being descending component carrier 2 and uplink component carrier 1, descending component carrier 3 and uplink component carrier 2, descending component carrier 5 and uplink component carrier 3 respectively.Non-backward compatible component carrier is to being descending component carrier 1 and descending component carrier 1, descending component carrier 4 and uplink component carrier 2 respectively.Wherein, the center carrier frequencies of configurating downlink component carrier 1 and descending component carrier 4 is not on 100KHz, base station issues connected state terminal at descending component carrier 1 and component carrier 4 and to work alone must configure on such component carrier, as synchronous/system information/paging etc.
To LTE-A terminal, Cell searching is searched for by the frequency of 100KHz integral multiple, if initial downlink is synchronized on descending component carrier 2, and then receive broadcast, its pairing uplink component carrier 1 is known by broadcast, LTE-A terminal sends RACH targeting sequencing in uplink component carrier 1, after eNodeB receives RACH targeting sequencing, know that the resident descending component carrier of LTE-A is descending component carrier 2, and send RACH response at descending component carrier 2, LTE-A terminal sends message 3 in uplink component carrier 1 after receiving RACH response, eNodeB and then send message 4 at descending component carrier 2.
The LTE-A terminal of connected state can work alone a descending component carrier in office.
When LTE-A terminal forwards Idle state to from connected state, eNodeB is configured to descending backward compatibility carrier wave, as on component carrier 2, and this terminal and then reside in descending component carrier 2.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.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 (7)
1. the method for work of enhanced long-term evolution terminal, comprising:
The enhanced long-term evolution terminal being in connected state need by means of the Informational support on backward compatibility carrier wave, work alone in non-backward compatible carrier waves, after described enhanced long-term evolution terminal transfers Idle state to from connected state, reside on described backward compatibility carrier wave.
2. the method for claim 1, is characterized in that,
Strengthen the system configuration parameter that base station provides described enhanced long-term evolution terminal to work alone in this non-backward compatible carrier waves in described non-backward compatible carrier waves.
3. method as claimed in claim 2, is characterized in that,
Described non-backward compatible carrier waves refers to the descending component carrier of non-backward compatible.
4. the method for claim 1, is characterized in that,
After described enhanced long-term evolution terminal carries out initial synchronization operation with described enhancing base station in the rear on com-patible downmix component carrier, the uplink component carrier corresponding with the descending component carrier of described backward compatibility sends random access preamble message, after described enhancing base station receives described random access preamble message, on com-patible downmix component carrier, sends accidental access response in the rear.
5. the method for claim 1, is characterized in that,
Set up between described enhanced long-term evolution terminal and described enhancing base station in wireless heterogeneous networks connection procedure, described enhancing base station sends wireless heterogeneous networks connection establishment message in the rear on com-patible downmix component carrier.
6. the work system of enhanced long-term evolution terminal, comprises enhanced long-term evolution terminal and strengthens base station, it is characterized in that,
Described enhanced long-term evolution terminal, for when being in connected state, need not work alone in non-backward compatible carrier waves by means of the Informational support of backward compatibility carrier wave; For when being in Idle state, only reside on the descending component carrier of backward compatibility;
Described enhancing base station, described non-backward compatible carrier waves provides the system configuration parameter that described enhanced long-term evolution terminal works alone in this non-backward compatible carrier waves.
7. system as claimed in claim 6, is characterized in that,
Described enhancing base station, also for carrying out initial synchronization operation in the rear on com-patible downmix component carrier with described enhanced long-term evolution terminal, after the uplink component carrier corresponding with the descending component carrier of described backward compatibility receives random access preamble message, on com-patible downmix component carrier, send accidental access response in the rear; And and set up in wireless heterogeneous networks connection procedure between described enhanced long-term evolution terminal, on com-patible downmix component carrier, send wireless heterogeneous networks connection establishment message in the rear.
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| US8812006B2 (en) | 2009-11-02 | 2014-08-19 | Telefonaktiebolaget L M Ericsson (Publ) | Methods and arrangements in a wireless communication system |
| CN105592521A (en) * | 2010-01-12 | 2016-05-18 | 富士通株式会社 | Wireless communication device, wireless terminal device, and wireless communication method |
| CN102196532A (en) * | 2010-03-05 | 2011-09-21 | 中兴通讯股份有限公司 | Network access method and system |
| CN102196555B (en) * | 2010-03-10 | 2016-04-13 | 中兴通讯股份有限公司 | Method for processing idle mode |
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| CN101039208A (en) * | 2006-03-13 | 2007-09-19 | 大唐移动通信设备有限公司 | Method for updating working state of user terminal |
| EP2007083A2 (en) * | 2006-03-27 | 2008-12-24 | Huawei Technologies Co Ltd | A method and apparatus for controlling bearer of service data flows |
| CN101404539A (en) * | 2008-11-18 | 2009-04-08 | 中兴通讯股份有限公司 | Data transmission method for mixed time division duplex large band width system |
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| CN101039208A (en) * | 2006-03-13 | 2007-09-19 | 大唐移动通信设备有限公司 | Method for updating working state of user terminal |
| EP2007083A2 (en) * | 2006-03-27 | 2008-12-24 | Huawei Technologies Co Ltd | A method and apparatus for controlling bearer of service data flows |
| CN101404539A (en) * | 2008-11-18 | 2009-04-08 | 中兴通讯股份有限公司 | Data transmission method for mixed time division duplex large band width system |
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