CN101170466A - Mode conversion method and communication system - Google Patents
Mode conversion method and communication system Download PDFInfo
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- CN101170466A CN101170466A CNA2006101507875A CN200610150787A CN101170466A CN 101170466 A CN101170466 A CN 101170466A CN A2006101507875 A CNA2006101507875 A CN A2006101507875A CN 200610150787 A CN200610150787 A CN 200610150787A CN 101170466 A CN101170466 A CN 101170466A
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Abstract
The invention discloses a mode conversion method and a communication system, so as to reduce the delay time of the conversion from the point-to-point mode to the point-to-multipoint mode. The method includes the following steps: a wireless network controller detects the conversion threshold; the point-to-multipoint carrying information is sent to the user with the point-to-point mode; the user establishes the point-to-multipoint carrying and receiving data according to the received point-to-multipoint carrying information of the user. The system includes: an user equipment and the wireless network controller; the wireless network controller is used to detect whether the conversion threshold is achieved, if yes, the point-to-multipoint carrying information is sent to the user; the user equipment is used for receiving the point-to-multipoint carrying information from the wireless network controller and establishing the point-to-multipoint carrying and receiving data according to the point-to-multipoint carrying information. The invention can effectively reduce the delay time of the mode conversion.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of mode conversion method and communication system.
Background technology
At multimedia broadcast multicast service (MBMS, Multimedia Broadcast Multicast Service) in general two kinds of communication modes is arranged, a kind of is point-to-point (PTP) pattern, the user is in the transmission of the enterprising line data of dedicated channel, another kind is that point arrives multiple spot (PTM) pattern, and the user is in the transmission of the enterprising line data of common signal channel.Because PTP carries power control mechanism, so, can think that ptp mode is more saved power resource than PTM pattern under the less situation of user.
But, when number of users surpasses certain thresholding, radio network controller (RNC, RadioNetwork Controller) need to start the MBMS business from ptp mode to the PTM mode switch.
See also Fig. 1, a kind of mode conversion method is in the prior art:
101, the RNC judgement reaches switching threshold, discharges the PTP carrying;
102, user's read system message obtains the MBMS point to multiple spot control channel (MCCH) channel information from system message;
103, obtain the PTM beared information according to described MCCH channel information from the MCCH channel;
104, set up the PTM carrying and receive data according to described PTM beared information.
But, because the user originally used ptp mode, need to use the PTM pattern now, so just need to revise the beared information on the MCCH, and the beared information on the MCCH just can be updated after will waiting for a modification cycle, so under the poorest situation, PTP user may need to wait for that the MCCH cycle of revising just can get access to the PTM beared information, so ptp mode depends on that to the main time of delay of PTM mode switch MCCH revises the cycle in the prior art, and the modification cycle of MCCH is 1.28 seconds to 10.24 seconds, reach a second level time of delay of mode switch, so can have a strong impact on the normal use of user in actual applications to business.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of mode conversion method and communication system, can reduce the time of delay of ptp mode to the PTM mode switch.
Mode conversion method of the present invention comprises: radio network controller detects and reaches switching threshold; Send a little to the multiple spot beared information to the point-to-point mode user; Described user sets up point to multiple spot carrying and reception data according to the described point that receives to the multiple spot beared information.
Alternatively, described point-to-point mode user comprises: point-to-point mode communication user and point-to-point mode request user.
Alternatively, the described step that sends some the multiple spot beared information to the point-to-point mode user comprises: radio network controller sends to the point-to-point mode communication user and comprises radio bearer release message or the reconfiguration message that a little arrives the multiple spot beared information.
Alternatively, described radio network controller comprises before detecting the step that reaches switching threshold: point-to-point mode request user initiates wireless resource control connection request; The described step that sends some the multiple spot beared information to the point-to-point mode user comprises: radio network controller sends to described user and comprises the refusal connection message that a little arrives the multiple spot beared information.
Alternatively, described radio network controller comprises before detecting the step that reaches switching threshold: point-to-point mode request user initiates wireless resource control connection request; The described step that sends some the multiple spot beared information to the point-to-point mode user comprises: set up described user's radio resource control connection; Radio network controller sends to described user and comprises the connection release message that a little arrives the multiple spot beared information.
Alternatively, the described step that sends some the multiple spot beared information to the point-to-point mode user comprises: radio network controller sends to comprise a little to the multimedia broadcast multicast of multiple spot beared information to the point-to-point mode communication user serves public point to multi-point wireless bearer messages and multimedia broadcast multicast is served current P-T-M wireless loading message.
Alternatively, the described point-to-point mode request user step of initiating wireless resource control connection request comprises: point-to-point mode request user sends the wireless resource control connection request message that comprises the multimedia broadcast multicast service identifier to radio network controller in bearing mode is the sub-district of point-to-point mode.
Alternatively, the described point-to-point mode user step of initiating wireless resource control connection request comprises: point-to-point mode request user switches to sub-district that bearing mode be point-to-point for point to the sub-district of multiple spot from bearing mode; Send the wireless resource control connection request message that comprises the multimedia broadcast multicast service identifier to radio network controller.
Alternatively, described switching threshold is the point-to-point mode number of users, and/or the point-to-point mode performance number.
Communication system provided by the invention comprises: subscriber equipment and radio network controller; Described radio network controller is used for detecting whether reach switching threshold, if reach, then sends point to the multiple spot beared information to subscriber equipment; Described subscriber equipment is used to receive point from radio network controller to the multiple spot beared information, sets up point to the multiple spot carrying and receive data according to described point to the multiple spot beared information.
Alternatively, described subscriber equipment also is used to send wireless resource control connection request; Described radio network controller comprises: connection processing unit and carrying processing unit; Described connection processing unit is used to receive the wireless resource control connection request that subscriber equipment sends, and judges whether to reach switching threshold, and carries the refusal connection message that a little arrives the multiple spot beared information or discharge connection message to described subscriber equipment transmission; Described carrying processing unit unit is used for carrying radio bearer release message or the reconfiguration message that a little arrives the multiple spot beared information to described subscriber equipment transmission.
Above technical scheme as can be seen, the present invention has the following advantages:
At first, among the present invention, RNC initiatively sends the PTM beared information to the ptp mode user, and do not need the user to obtain the PTM beared information from the MCCH channel, so ptp mode depends on that to the main time of delay of PTM mode switch RNC begins to send the interval of data between the moment to the common signal channel that the ptp mode user sends the PTM beared information moment and this MBMS business of carrying among the present invention, wherein the common signal channel setup delay is a most important part, the present invention is generally about 200 milliseconds, so can reduce the time of delay of ptp mode to the PTM mode switch;
Secondly, among the present invention, at the point-to-point mode communication user of having set up the PTP carrying, RNC can send radio bearer release message or the reconfiguration message that comprises the PTM beared information, set up the point-to-point mode request user of PTP carrying at request, RNC can send connection refused message or the connection release message that comprises the PTM beared information, so can improve the flexibility of mode switch;
At last, the present invention both can be at the mode switch in the same sub-district, can also be at the mode switch of handover, so further improved the flexibility of mode switch.
Description of drawings
Fig. 1 is a prior art mode switch flow chart;
Fig. 2 is the inventive method embodiment mode switch flow chart;
Fig. 3 is the inventive method first embodiment signaling process figure;
Fig. 4 is the inventive method second embodiment signaling process figure;
Fig. 5 is the inventive method the 3rd embodiment signaling process figure;
Fig. 6 is a system implementation mode schematic diagram of the present invention.
Embodiment
The invention provides a kind of mode conversion method and communication system, be used to reduce the time of delay of ptp mode to the PTM mode switch.
See also Fig. 2, the inventive method embodiment flow process is:
201, RNC detects and reaches switching threshold;
Wherein, switching threshold can be provided with multiple condition, specifically can be the ptp mode number of users, and/or the ptp mode performance number, can also be the condition of other settings.
202, RNC sends the PTM beared information to the ptp mode user;
203, the ptp mode user sets up the PTM carrying and receives data according to the PTM beared information that receives.
It is key point of the present invention that RNC sends the PTM beared information to the ptp mode user, below the process that sends is elaborated, and in the following embodiments, switching threshold is a ptp mode number of users thresholding, be understandable that, and can be other thresholding equally.
Wherein, the ptp mode user both can be a ptp mode communication user of having set up the PTP carrying, also can be the ptp mode request user that the PTP carrying is set up in application, wherein, ptp mode request user can connect and is divided into the ptp mode request and connects user and ptp mode request communication user again according to whether having set up RRC.
Process of transmitting specifically comprises following three kinds of situations:
One, see also Fig. 3, the inventive method first embodiment flow process comprises:
301, judge that number of users surpasses switching threshold;
Wherein, control RNC (CRNC) detects in real time to current ptp mode communication, or regularly detects, and has surpassed the threshold number that presets if find the quantity of current ptp mode communication user, then judges and need carry out mode switch.
302, the common signal channel notice is set up in transmission;
Wherein, CRNC sends notice to NODE B, and request NODE B sets up common signal channel.
303, sending mode conversion notice;
Wherein, CRNC is to Serving RNC (SRNC) sending mode conversion notice, and request SRNC carries out mode switch.
304, send the radio bearer release message;
Wherein, SRNC sends the radio bearer that the radio bearer release message is used to discharge described user to the ptp mode communication user, comprises the PTM beared information in this message.
305, set up PTM carrying and reception data.
Wherein, the user receives after the radio bearer release message, sets up the PTM carrying and begins to attempt receiving data according to PTM beared information wherein.
In the present embodiment, SRNC is the radio bearer release message to messages sent by users, can be reconfiguration message equally, and handling process is similar.
In the present embodiment, need expand the radio bearer release message, concrete expansion is as follows:
Increase a field in original radio bearer release message, field is called MBMS modechange info, is set to optionally, and it is defined as follows shown in the table:
Table 1
| Information element/group name | Whether necessary | Multi | Type | Describe | Version |
| Secondary CCPCH info MBMS | MP | Secondary CCPCH info MBMS 10.3.6.71a | |||
| MBMS Soft Combining Timing Offset | CV-Soft-FDD | MBMS Soft Combining Timing Offset 10.3.9a.10a | Timing offset applied in the CFN calculation in sub-clause 8.5.15.5.The default value is 0ms | ||
| TFCS | MP | Transport format combination set 10.3.5.20 | |||
| TrCH information list | MP | FACH transport channel carrying the MTCH and optionally one MSCH | |||
| ＞TFS | MP | Transport format set 10.3.5.23 | |||
| ＞MSCH configuration information | OP | MSCH configuration information 10.3.9a.16 |
| ＞TRCH Status | MP | Boolean | Value TRUE means that this trch is used to carry the mbms service | ||
| ＞MBMS info | CV-TRCH Status | ||||
| ＞＞MBMS logical channel identity | MP | Integer(1..15) | This identifier is used to distinguish different MTCH mapped on to a TrCh (“MBMS-Id” within the MAC header[15]) | ||
| ＞＞PDCP info | MP | PDCP info 10.3.4.2 | |||
| ＞＞RLC info | MP | RLC info MBMS 10.3.4.23a |
Two, see also Fig. 4, the inventive method second embodiment flow process comprises:
401, judge that need set up PTP carries;
Wherein, when the ptp mode request connected user's request with server communication, subscriber equipment judged that at first needing to set up RRC connects.402, send RRC connection request message;
Wherein, the user sends RRC connection request message to CRNC, carries the MBMS service identifier in this request message.
403, judge that number of users reaches the thresholding to the PTM mode switch;
Wherein, the RRC connection request message that CRNC receives user's transmission detects current ptp mode communication user number afterwards, if do not reach switching threshold, then connects for this user sets up RRC, if reach switching threshold, then judgement need be carried out mode switch.
404, the common signal channel notice is set up in transmission;
Wherein, CRNC sends notice to NODE B, and request NODE B sets up common signal channel.
405, send the RRC connection refused message;
Wherein, CRNC sends the RRC connection refused message to the user, in this message, carries the PTM beared information.
406, set up PTM carrying and reception data.
Wherein, the user receives after the RRC connection refused message, sets up the PTM carrying and begins to attempt receiving data according to PTM beared information wherein.
What present embodiment was primarily aimed at is the pattern that strengthens broadcasting, under this pattern, CRNC can judge the business that the user need use by the RRC connection request message that comprises the MBMS service identifier that the user sends, if because this user's request has triggered this MBMS business to the PTM mode switch, then can directly refuse this connection request, promptly CRNC sends the PTM beared information by send the RRC refuse information to the user;
As can be seen, strengthening under the broadcast mode, RNC can also be chosen in and send the PTM carrying by the RRC connection release message after RRC connection foundation is finished.
And at the standard multicast pattern, RNC can not directly obtain the business that the user need use from the RRC connection request that the user sends, the user select professional information be the user set up RRC connect and finish with core net mutual after, send to the user by SGSN by the Linking process.At this moment, if because this user's adding has caused this MBMS business model to the PTM mode switch, RNC discharges the RRC connection that this user sets up, and send the RRC release message that comprise PTM beared information, i.e. connection release message to the user this moment.
In addition, in the present embodiment, it is that example describes that ptp mode request user connects the user with the ptp mode request, be understandable that, ptp mode request user can be ptp mode request communication user equally, promptly set up the RRC connection and do not set up the user that PTP carries as yet, for this user, RNC can be by comprising the conversion of the connection release message implementation pattern of PTM beared information to its transmission.
In the present embodiment, need expand Radio Resource control connection refuse information, concrete extended mode also is to realize by increasing a field, field is called MBMS mode change info, be set to optional, specifically define shown in method embodiment one, same connection release message also needs to expand, and method is consistent with the extending method among the embodiment one.
In the present embodiment, for reducing the time of delay of mode switch, step 404 and 405 should be carried out as far as possible simultaneously.
The foregoing description illustrates respectively at different users takes different send modes, in its once actual really mode switch process, may use multiple send mode simultaneously:
For example, current have 4 PTP users to set up the PTP carrying, and the switching threshold that is provided with is 4 users, when the RRC connection is set up in the 5th user's request, the CRNC judgement has surpassed switching threshold, need carry out mode switch, then carries out following three steps operation as far as possible simultaneously:
1, notice NODE B sets up common signal channel;
2, notice SRNC carries out mode switch;
3, to the 5th user feedback RRC connection refused message, wherein carry the PTM beared information.
SRNC receives that the mode switch notice back of CRNC sends radio bearer release message or reconfiguration message to other 4 users, wherein carries the PTM beared information.
Three, see also Fig. 5, the inventive method the 3rd embodiment flow process comprises:
501, the user carries out the sub-district switching and asks to set up the PTP carrying;
Wherein, when the cell-of-origin is the PTM mode cell, when Target cell was the ptp mode sub-district, the user set up the PTP carrying in the Target cell request.
502, send RRC connection request message;
Wherein, the ptp mode request connects the user and sends RRC connection request message to CRNC, and request is set up RRC and connected, and carries the MBMS service identifier in this request message.
503, judge that number of users reaches the thresholding to the PTM mode switch;
Wherein, the RRC connection request message that CRNC receives user's transmission detects current ptp mode number of users afterwards, if do not reach switching threshold, then connects for this user sets up RRC, if reach switching threshold, then judgement need be carried out mode switch.
504, the common signal channel notice is set up in transmission;
Wherein, CRNC sends notice to NODE B, and request NODE B sets up common signal channel.
505, send the RRC connection refused message;
Wherein, CRNC sends the RRC connection refused message to the user, in this message, carries the PTM beared information.
506, set up PTM carrying and reception data.
Wherein, the user receives after the RRC connection refused message, sets up the PTM carrying and begins to attempt receiving data according to PTM beared information wherein.
What present embodiment was primarily aimed at is the pattern that strengthens broadcasting, under this pattern, CRNC can judge the business that the user need use by the RRC connection request message that comprises the MBMS service identifier that the user sends, if because this user's request has triggered this MBMS business to the PTM mode switch, then can directly refuse this connection request, promptly CRNC sends the PTM beared information by send the RRC refuse information to the user;
As can be seen, strengthening under the broadcast mode, RNC can also be chosen in and send the PTM carrying by the RRC connection release message after RRC connection foundation is finished.
And at the standard multicast pattern, RNC can not directly obtain the business that the user need use from the RRC connection request that the user sends, the user select professional information be the user set up RRC connect and finish with core net mutual after, send to the user by SGSN by the Linking process.At this moment, if because this user's adding has caused this MBMS business model to the PTM mode switch, RNC discharges the RRC connection that this user sets up, and send the RRC release message that comprise PTM beared information, i.e. connection release message to the user this moment.
In the present embodiment, for reducing time of delay, step 504 and 505 should be carried out as far as possible simultaneously.
In addition, send the PTM beared information to the user and can also carry the realization of PTM beared information by MBMS COMMON P-T-M RBINFORMATION message and MBMS CURRENT CELL P-T-M RB INFORMATION message, above-mentioned two message were sent on DCCH before sending radio bearer release message or connection release message by RNC, and this moment, these two message were through simplifying (only comprising the PTM business that this UE need receive).
Concrete flow process is:
1, judges that number of users surpasses switching threshold;
Wherein, RNC detects in real time to current ptp mode communication, or regularly detects, and has surpassed the threshold number that presets if find the quantity of current ptp mode communication user, then judges and need carry out mode switch.
2, the common signal channel notice is set up in transmission;
Wherein, RNC sends notice to NODE B, and request NODE B sets up common signal channel.
3, send the PTM beared information;
Wherein, RNC sends the PTM beared information by DCCH to the user, and described PTM beared information is included among MBMS COMMON P-T-M RB INFORMATION and the MBMS CURRENTCELL P-T-M RB INFORMATION.
Increase a new field in above-mentioned two message, Cell identity by name is labeled as optionally, and type is Cell identity 10.3.2.2, and agreement is 25.331.
MBMS p-t-m RBinformation cell increases field among the MBMS CURRENT CELL P-T-M RB INFORMATION: MBMS Transmission identity by name, be labeled as optional, type is MBMS Transmission identity 10.3.9a.12, and agreement is 25.331.
4, set up PTM carrying and reception data.
Wherein, the user receives after the PTM beared information, sets up the PTM carrying and begins to attempt receiving data.
Present embodiment at be the pattern that strengthens broadcasting, be understandable that, the transmission of above-mentioned two message only need get final product before connection release message sends opportunity, equally can be at the standard multicast pattern, set up as long as RRC connects, RNC just can send the PTM beared information to the user by MBMS COMMON P-T-M RBINFORMATION and MBMS CURRENT CELL P-T-M RB INFORMATION message.
By top embodiment as can be known, depend on that the common signal channel that sends the PTM beared information moment and this MBMS business of carrying begins to send the interval of data between the moment time of delay of whole mode switch process, set up the common signal channel notice and carry out as far as possible simultaneously with sending and send PTM, so depend primarily on the time that common signal channel is set up the time of delay of whole mode switch, common signal channel settling time is generally about 200 milliseconds, so the present invention can reduce the time of delay of mode switch.
See also Fig. 6, communication system embodiment of the present invention comprises:
Wherein, subscriber equipment 601 also is used to send wireless resource control connection request;
Wherein, radio network controller 603 comprises: connection processing unit 6031 and carrying processing unit 6032;
Carrying processing unit 6032 is used for carrying radio bearer release message or the reconfiguration message that a little arrives the multiple spot beared information to subscriber equipment 601 transmissions.
More than a kind of mode conversion method provided by the present invention and communication system are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (11)
1. a mode conversion method is characterized in that, comprising:
Radio network controller detects and reaches switching threshold;
Send a little to the multiple spot beared information to the point-to-point mode user;
Described user sets up point to multiple spot carrying and reception data according to the described point that receives to the multiple spot beared information.
2. mode conversion method according to claim 1 is characterized in that, described point-to-point mode user comprises: point-to-point mode communication user and point-to-point mode request user.
3. mode conversion method according to claim 2 is characterized in that, the described step that sends some the multiple spot beared information to the point-to-point mode user comprises:
Radio network controller sends to the point-to-point mode communication user and comprises radio bearer release message or the reconfiguration message that a little arrives the multiple spot beared information.
4. mode conversion method according to claim 2 is characterized in that, described radio network controller comprises before detecting the step that reaches switching threshold:
Point-to-point mode request user initiates wireless resource control connection request;
The described step that sends some the multiple spot beared information to the point-to-point mode user comprises:
Radio network controller sends to described user and comprises the refusal connection message that a little arrives the multiple spot beared information.
5. mode conversion method according to claim 2 is characterized in that, described radio network controller comprises before detecting the step that reaches switching threshold:
Point-to-point mode request user initiates wireless resource control connection request;
The described step that sends some the multiple spot beared information to the point-to-point mode user comprises:
Set up described user's radio resource control connection;
Radio network controller sends to described user and comprises the connection release message that a little arrives the multiple spot beared information.
6. mode conversion method according to claim 2 is characterized in that, the described step that sends some the multiple spot beared information to the point-to-point mode user comprises:
Radio network controller sends to comprise a little to the multimedia broadcast multicast of multiple spot beared information to the point-to-point mode communication user serves public point to multi-point wireless bearer messages and multimedia broadcast multicast is served current P-T-M wireless loading message.
7. according to claim 4 or 5 described mode conversion methods, it is characterized in that the step that described point-to-point mode request user initiates wireless resource control connection request comprises:
Point-to-point mode request user sends the wireless resource control connection request message that comprises the multimedia broadcast multicast service identifier to radio network controller in bearing mode is the sub-district of point-to-point mode.
8. according to claim 4 or 5 described mode conversion methods, it is characterized in that the step that described point-to-point mode user initiates wireless resource control connection request comprises:
Point-to-point mode request user switches to the sub-district that bearing mode is a point-to-point from bearing mode for a sub-district to multiple spot;
Send the wireless resource control connection request message that comprises the multimedia broadcast multicast service identifier to radio network controller.
9. according to each described mode conversion method in the claim 1 to 6, it is characterized in that described switching threshold is the point-to-point mode number of users, and/or the point-to-point mode performance number.
10. a communication system is characterized in that, comprising: subscriber equipment and radio network controller;
Described radio network controller is used for detecting whether reach switching threshold, if reach, then sends point to the multiple spot beared information to subscriber equipment;
Described subscriber equipment is used to receive point from radio network controller to the multiple spot beared information, sets up point to the multiple spot carrying and receive data according to described point to the multiple spot beared information.
11. communication system according to claim 10 is characterized in that, described subscriber equipment also is used to send wireless resource control connection request;
Described radio network controller comprises: connection processing unit and carrying processing unit;
Described connection processing unit is used to receive the wireless resource control connection request that subscriber equipment sends, and judges whether to reach switching threshold, and carries the refusal connection message that a little arrives the multiple spot beared information or discharge connection message to described subscriber equipment transmission;
Described carrying processing unit unit is used for carrying radio bearer release message or the reconfiguration message that a little arrives the multiple spot beared information to described subscriber equipment transmission.
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| CN103430595A (en) * | 2011-03-21 | 2013-12-04 | 中兴通讯股份有限公司 | Method for switchover between MBMS transmission modes, apparatus, and user equipment |
| US9166808B2 (en) | 2011-03-21 | 2015-10-20 | Zte Corporation | Method for switchover between MBMS transmission modes, apparatus, and user equipment |
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