CN100551156C - Mobile communcations system is based on the changing method of shared channel - Google Patents
Mobile communcations system is based on the changing method of shared channel Download PDFInfo
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- CN100551156C CN100551156C CNB2006100786700A CN200610078670A CN100551156C CN 100551156 C CN100551156 C CN 100551156C CN B2006100786700 A CNB2006100786700 A CN B2006100786700A CN 200610078670 A CN200610078670 A CN 200610078670A CN 100551156 C CN100551156 C CN 100551156C
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Abstract
The invention discloses the changing method of a kind of mobile communcations system based on shared channel, at in the existing method because the changing method complexity, switch insert message too complexity cause using more the problem of reliable coding to be invented, comprise: judge that when the base station need switch and switch be when carrying out in same base station, Target cell is given terminal distribution identification number and is disposed wireless messages and uplink scheduling information; Target cell sends switching command message by the control channel of cell-of-origin; At least identification number configuration wireless messages and uplink scheduling information have been comprised in the message for terminal distribution; Terminal sends handoff completion message according to switching command message on the Uplink Shared Channel that Target cell is reserved.It is very succinct to switch the flow process that inserts in the cut process of the present invention, shortens and switches the time of implementation.Brief switching inserts message can be represented with bit still less, makes switching insert message and can adopt more reliable coding technology, makes the easier decoding of base station receiver.
Description
Technical field
The present invention relates to the changing method of mobile communcations system based on shared channel.
Background technology
E-DCH (extended-dedicated channel) technology that adopts in the present WCDMA system strengthens up data rate.Extended-dedicated channel and other channels (such as dedicated channel DCH) are shared a uplink scrambling code together on up direction, so can think that up channel resource is special-purpose.If direct-cut operation takes place between the base station, the process of its switching and DCH handoff procedure are similar, and promptly terminal in the configuration of preset time change wireless parameter, begins communication process then on up dedicated channel after receiving the physical channel reallocation message.
Based on the mobile communcations system that shared channel switches, mainly by terminal, base station and core net are formed.Exchange message mutually between the base station that is to say the connection that has at least in logic, and not getting rid of has direct physical connection between the base station, and the base station links to each other with core net.Communication is carried out in maximum whiles of terminal and a base station, that is to say not have up grand diversity between the base station.Belonging to when terminal move between the honeycomb of different base station in, can change Serving cell by the mode of direct-cut operation.Whether adopt direct-cut operation not do regulation for the moving between cells of terminal in a base station.
The protocol stack relevant with Radio Resource comprises radio resource control (hereinafter to be referred as RRC), radio link control (hereinafter to be referred as RLC), media access control protocol (hereinafter to be referred as MAC) and physical layer protocol (hereinafter to be referred as PHY) are all finished in the base station.RLC in the protocol stack, MAC and PHY are the public parts of chain of command agreement RRC and user's face.
On down direction, comprise common signal channel PCH (paging channel) at least, broadcast channel (BCH) and DSCH Downlink Shared Channel (DSCH); On up direction, comprise public Random Access Channel (RACH) and Uplink Shared Channel (USCH) at least.Network sends paging information, broadcast system information on BCH on PCH.The RACH channel is a terminal when beginning access network, sends the channel of first up access message that solves based on conflict.The up-downgoing shared channel is the wireless interface resource that the base station need be dispatched.
In order effectively to utilize valuable Radio Resource, the Radio Resource of up-downgoing all is to finish by the scheduling of base station, the important evidence of wherein up wireless resource scheduling is the dispatch request information that terminal sends according to pre-defined rule, at least the buffering situation that comprises terminal in the dispatch request information, power condition.The scheduling of descending Radio Resource is based on the report of the relevant communication quality of terminal feedback.Terminal all needs to obtain could continue next step communication after the uplink synchronous when being linked into system at every turn in addition.
When switching occurred between the base station, because need cooperation between the base station, the process of handoff preparation phase was longer relatively.And from the agreement angle, because the RRC of chain of command (Radio Resource control) agreement, the RLC that chain of command and user's face are total, MAC and PHY agreement realize at an inside of base station.Just mean that in switching between the base station processing entities on all these protocol layers all needs to rebulid, and because terminal is when inserting target BS, need a up synchronizing process, these make that all the hand-off execution process between the base station is long, so adopt method, will cause very big waste at the Target cell reserved resource.
If but switch inside of base station takes place, so because can keep synchronous between terminal and the base station always, and a big chunk information can be shared between cell-of-origin and Target cell on chain of command and user's face, so with respect to switchover procedure between base station, the switching of inside of base station takes place the time, cooperation between cell-of-origin and the Target cell has become the cooperation of an inside of base station, do not need long time, so when switching, can directly reserve Radio Resource at Target cell, can shoot the arrow at the target when making the incision of terminal, avoid and other-end between resource contention, the reliability of improve switching.
Summary of the invention
At defective that exists in the prior art and deficiency, the objective of the invention is to propose the changing method of the mobile communcations system of a kind of source base station when identical based on shared channel with target BS, in handoff procedure, adopt the method for directly reserving Radio Resource at Target cell, omitted the process that inserts of switching, accelerate the process of switching, shortened the time of switching.
In order to achieve the above object, the present invention proposes a kind of method, comprising:
(1) source base station of terminal and Serving cell is set up Radio Link;
(2) source base station sends measurement control order to terminal, requires terminal to measure the wireless signal of Serving cell and adjacent cell;
(3) terminal is according to the wireless signal of the Control Parameter measure neighbor cells in the described measurement control order, and generates measurement report according to measurement result, sends to Serving cell;
(4) source base station is after receiving the measurement report of terminal, judge whether to need to trigger to switch, and if the target BS of Target cell and described source base station be same base station, enter (5) step so, otherwise return step (2);
(5) Target cell is given the identification number of this terminal of unique identification of terminal distribution, and reserves the required Radio Resource of switching;
(6) Target cell sends switching command message by the control channel of cell-of-origin; At least comprised in the message and be the identification number of terminal distribution, Target cell resource allocation information and uplink scheduling information; Described radio configuration information is meant the configuration information of the protocol entity that need reset at Target cell; Described uplink scheduling information is meant the resource and the physical layer parameter of up wireless channel;
(7) terminal is after receiving this switching command message, and Target cell resource allocation information and uplink scheduling information according in the switching command message send handoff completion message on the Uplink Shared Channel of Target cell;
Wherein, described wireless channel is a shared channel.
In the time of terminal and a base station communication, might be simultaneously and more than one sub-district carry out communication, so that the gain of grand diversity to be provided, so described handoff procedure also can be the process of activating set updating, described method also comprises:
(1) source base station of terminal and Serving cell is set up Radio Link;
(2) source base station sends measurement control order to terminal, requires terminal to measure the wireless signal of Serving cell and adjacent cell;
(3) terminal is according to the wireless signal of the Control Parameter measure neighbor cells in the described measurement control order, and generates measurement report according to measurement result, sends to Serving cell;
(4) source base station is after receiving the measurement report of terminal, judge whether to need to trigger to switch, and if the target BS of Target cell and described source base station be same base station, enter (5) step so, otherwise return step (2);
(5) Target cell is given the identification number of this terminal of unique identification of terminal distribution, and activating set updating required radio configuration information and uplink scheduling information are set; Described radio configuration information is meant the configuration information of the protocol entity that need reset at Target cell; Described uplink scheduling information is meant the resource and the physical layer parameter of up wireless channel;
(6) Target cell sends activating set updating message by the control channel of cell-of-origin; At least radio configuration information and uplink scheduling information have been comprised in the message for the identification number of terminal distribution and Target cell;
(7) terminal adopts existing uplink synchronous information to send activating set updating on the Uplink Shared Channel that Target cell is reserved and finishes message after receiving this activating set updating message;
Described activating set updating is meant terminal in maintenance and Serving cell communication, the data communication between increase and the Target cell.Described wireless channel is a shared channel.
The present invention proposes the changing method of mobile communcations system based on shared channel, is applied to the source base station situation identical with target BS.In handoff procedure, adopt the method for directly reserving Radio Resource at Target cell, omitted and switched the process that inserts, accelerated the process of switching, shortened the time of switching.
Description of drawings
The mobile communcations system that Fig. 1 proposes for the present invention is based on the changing method flow chart of shared channel;
The mobile communcations system that Fig. 2 proposes for the present invention is based on activating set updating flow chart in the changing method of shared channel.
Embodiment
Existing long evolving system (LTE) possesses the feature of mobile communcations system described in the background technology, and example of the present invention is meant the implementation method in the LTE wireless telecommunication system.
Preferred embodiment of the present invention example 1 is at the target BS fast switch over method identical with source base station, what is called is changing method fast, is meant to comprise the resource that is used to transmit the Radio Resource of up control signaling and is used for the data block of transmission user face in the target BS reserved radio resource.Terminal when sending signaling, can send upstream data immediately, and not need extra ascending resource application process when receiving first ascending resource scheduling information like this, makes that the time of switching execution is very quick.May further comprise the steps:
Step 101: the source base station of Serving cell and terminal between set up Radio Link after, can carry out various measurements by measuring the control flow control terminal, wherein also comprise Serving cell and adjacent cell signal strength signal intensity, the tasks such as quality measured.Terminal begins to measure in the time that requires after receiving measuring control information, and according to the report rule of prior regulation, reporting measurement reports.
Step 102: source base station judges whether that according to certain handoff algorithms needs trigger switching after receiving the measurement report of terminal.If trigger to switch, and Target cell enters step 103 so just in this base station, otherwise continues the processing measurement report.
Step 103: Target cell is given the identification number C_RNTI of this terminal of unique identification in Target cell of terminal distribution, be relevant processing resource and Uplink Shared Channel resource of terminal configuration according to existing communication context then, the control channel by the cell-of-origin sends switching command message then.At least Target cell resource allocation information and uplink scheduling information, i.e. Uplink Shared Channel information of Yu Liuing have been comprised being the C_RNTI of terminal distribution in the message.
Step 104: terminal according to Target cell resource allocation information and the uplink scheduling information in the switching command, adopts existing uplink synchronous information to send handoff completion message on the Uplink Shared Channel that Target cell is reserved after receiving switching command.The terminal process of transmitting of upstream data that will begin in a minute then
Step 105: Target cell after receiving handoff completion message, the transmission of the downlink data that will begin in a minute.
The present invention can also be applied in the activating set updating process between the inside of base station sub-district, and this renewal process may further comprise the steps as shown in Figure 2:
Step 201: the base station and terminal between set up Radio Link after, can carry out various measurements by measuring the control flow control terminal, wherein also comprise Serving cell and adjacent cell signal strength signal intensity, the tasks such as quality measured.Terminal begins to measure in the time that requires after receiving measuring control information, and according to the report rule of prior regulation, reporting measurement reports.
Step 202: the base station judges whether the needs collection renewal process that triggers the activation according to certain handoff algorithms after receiving the measurement report of terminal, promptly keep and the prerequisite of cell-of-origin communication under, the communication between increase and the Target cell.If trigger the adjacent cell process, and Target cell enters 203 steps so just in this base station, otherwise continues the processing measurement report.
Step 203: Target cell is given the identification number C_RNTI of this terminal of unique identification of terminal distribution, and reserved resource, and the control channel by the cell-of-origin sends activating set updating message then.At least comprised in the message and be the C_RNTI of terminal distribution, Target cell resource allocation information and uplink scheduling information.
Step 204: terminal is after receiving activating set updating, according to Target cell resource allocation information and the uplink scheduling information in the activating set updating message, adopt existing uplink synchronous information on the Uplink Shared Channel that Target cell is reserved, to send activating set updating and finish message.
Step 205: terminal begin and Target cell between carry out data communication.
Claims (5)
1, a kind of mobile communcations system comprises based on the changing method of shared channel:
(1) source base station of terminal and Serving cell is set up Radio Link;
(2) source base station sends measurement control order to terminal, requires terminal to measure the wireless signal of Serving cell and adjacent cell;
(3) terminal is according to the wireless signal of the Control Parameter measure neighbor cells in the described measurement control order, and generates measurement report according to measurement result, sends to Serving cell;
(4) source base station is after receiving the measurement report of terminal, judge whether to need to trigger to switch, and if the target BS of Target cell and described source base station be same base station, enter (5) step so, otherwise return step (2);
(5) Target cell is given the identification number of this terminal of unique identification of terminal distribution, and switching required radio configuration information and uplink scheduling information are set; Described radio configuration information is meant the configuration information of the protocol entity that need reset at Target cell; Described uplink scheduling information is meant the resource and the physical layer parameter of up wireless channel;
(6) Target cell sends switching command message by the control channel of cell-of-origin; At least comprised in the message and be the identification number of terminal distribution and Target cell radio configuration information and uplink scheduling information;
(7) terminal sends handoff completion message on the Uplink Shared Channel that Target cell is reserved after receiving this switching command message.
2, mobile communcations system according to claim 1 is characterized in that based on the changing method method of shared channel, and described wireless channel is a shared channel.
3, a kind of mobile communcations system comprises based on the changing method of shared channel:
(1) source base station of terminal and Serving cell is set up Radio Link;
(2) source base station sends measurement control order to terminal, requires terminal to measure the wireless signal of Serving cell and adjacent cell;
(3) terminal is according to the wireless signal of the Control Parameter measure neighbor cells in the described measurement control order, and generates measurement report according to measurement result, sends to Serving cell;
(4) source base station is after receiving the measurement report of terminal, judge whether to need to trigger to switch, and if the target BS of Target cell and described source base station be same base station, enter (5) step so, otherwise return step (2);
(5) Target cell is given the identification number of this terminal of unique identification of terminal distribution, and activating set updating required radio configuration information and uplink scheduling information are set; Described radio configuration information is meant the configuration information of the protocol entity that need reset at Target cell; Described uplink scheduling information is meant the resource and the physical layer parameter of up wireless channel;
(6) Target cell sends activating set updating message by the control channel of cell-of-origin; At least radio configuration information and uplink scheduling information have been comprised in the message for the identification number of terminal distribution and Target cell;
(7) terminal adopts existing uplink synchronous information to send activating set updating on the Uplink Shared Channel that Target cell is reserved and finishes message after receiving this activating set updating message;
4, mobile communcations system according to claim 3 is characterized in that based on the changing method of shared channel, and described activating set updating is meant terminal in maintenance and Serving cell communication, the data communication between increase and the Target cell.
5, mobile communcations system according to claim 3 is characterized in that based on the changing method of shared channel, and described wireless channel is a shared channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100786700A CN100551156C (en) | 2006-04-30 | 2006-04-30 | Mobile communcations system is based on the changing method of shared channel |
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| CNB2006100786700A CN100551156C (en) | 2006-04-30 | 2006-04-30 | Mobile communcations system is based on the changing method of shared channel |
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| CN100551156C true CN100551156C (en) | 2009-10-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101562848B (en) * | 2008-04-18 | 2011-10-05 | 华为技术有限公司 | Method and device for reselecting carrier frequency |
| CN101742552A (en) * | 2008-11-11 | 2010-06-16 | 华为技术有限公司 | Method, system and equipment for packet switch domain service redirection |
| KR101750371B1 (en) * | 2009-12-24 | 2017-07-03 | 삼성전자 주식회사 | Method and apparatus defining transmission and reception time of physical channels supporting cross carrier scheduling in TDD cellular communication systems |
| CN102137424A (en) * | 2010-09-03 | 2011-07-27 | 华为技术有限公司 | Switching method, private network user equipment, access network equipment and system |
| CN102457434B (en) * | 2010-11-01 | 2014-12-31 | 中兴通讯股份有限公司 | Base station interaction method and device |
| CN102612088B (en) * | 2011-01-18 | 2016-01-27 | 华为技术有限公司 | Based on the communication means of carrier convergence technology and system, base station in heterogeneous network |
| EP2926595A1 (en) * | 2012-11-27 | 2015-10-07 | Sigram Schindler Beteiligungsgesellschaft mbH | Handover proactive association provisioning support method and system |
| CN104782179B (en) * | 2013-09-25 | 2019-12-06 | 华为技术有限公司 | switching method and device |
| CN105704769B (en) * | 2016-04-01 | 2019-03-19 | 京信通信系统（中国）有限公司 | The method and system of handover between cells in base station |
| CN113115392B (en) * | 2020-01-10 | 2022-10-28 | 上海朗帛通信技术有限公司 | Method and arrangement in a communication node used for wireless communication |
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