CN100359988C - Method for joining multicast in radio communication - Google Patents
Method for joining multicast in radio communication Download PDFInfo
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- CN100359988C CN100359988C CNB2004100561163A CN200410056116A CN100359988C CN 100359988 C CN100359988 C CN 100359988C CN B2004100561163 A CNB2004100561163 A CN B2004100561163A CN 200410056116 A CN200410056116 A CN 200410056116A CN 100359988 C CN100359988 C CN 100359988C
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Abstract
The present invention relates to a method for joining multicast in wireless communication, which is characterized in that the present invention comprises the following steps: a. user equipment makes an application for joining a multicasting service; b. wireless access network equipment controls the user equipment to select a frequency layer; c. the user equipment establishes wireless bearing for the multicasting service and receives multicasting data. In a method of joining the service in a conversation which is added with a frequency layer centralized operation step, the present invention enables network control to effectively utilize wireless resources and centralizes the UE as far as possible to a preferred frequency layer cell, and few resources can be allocated for other cells.
Description
Technical field
The present invention relates to the communications field, relate in particular to the method that adds multicast in a kind of radio communication.
Technical background
Multicast and broadcasting are the technology that transmits data from a data source to a plurality of targets.In traditional mobile network, cell broadcaste service (CBS:Cell Broadcast Service) allows low bit rate data to share broadcast channel to all users' transmissions by the sub-district, belongs to information series business.
Now, people no longer are satisfied with phone and messaging service to the demand of mobile communication, fast development along with Internet, a large amount of multimedia services emerge, the some of them applied business requires a plurality of users can receive identical data simultaneously, as video request program, television broadcasting, video conference, online education, interactive game etc.These mobile multi-media services are compared with general data, have characteristics such as data volume is big, longer duration, delay sensitive.Present IP multicasting technology only is applicable to wired IP network, is not suitable for the mobile network, because the mobile network has particular network structure, functional entity and wave point, these are all different with wired IP network.
In order to effectively utilize mobile network resource, the WCDMA/GSM global standardsization organize 3GPP to propose multimedia multicast and broadcasting service (MBMS:Multimedia Broadcast/Multicast Service), in the mobile network, provide a data source to send the point-to-multipoint service of data to a plurality of users, the realization Internet resources are shared, improve utilization rate of network resource, the interface resource of especially eating dishes without rice or wine.The MBMS of 3GPP definition can not only realize the classes of messages multicast and the broadcasting of plain text low rate, and can also realize the multicast and the broadcasting of high-speed multimedia business, and this has complied with the trend of following mobile data development undoubtedly.
The architecture of MBMS as shown in Figure 1, in order to support the MBMS business, increased the mobile network functional entity newly---broadcast multicast service center (BM-SC), it is content provider's a inlet, be used for authorizing and initiating the MBMS bearer service, and plan transmits the MBMS content to schedule at mobile network.
In addition, subscriber equipment (UE), land radio access web (UTRAN), GSM EDGE Radio Access Network (GERAN), Serving GPRS Support Node (SGSN), Gateway GPRS Support Node functional entitys such as (GGSN) strengthen, and have increased the relevant function of MBMS.
MBMS comprises multicast pattern and broadcast mode.Multicast pattern needs user's corresponding multicast group of contracting, and carries out activation of service, and produces corresponding charge information.Because it is different that multicast and broadcast mode exist, cause also difference of its operation flow on business demand.
The MBMS business has two kinds of patterns when transmitting between UTRAN and UE: put multiple spot (PTM Pointto Multipoint) pattern and point-to-point (PTP Point to Point) pattern.The PTM pattern sends identical data by the MTCH logic channel, and all add multicast service or can receive the interested UE of broadcasting service; Ptp mode sends data by the DTCH logic channel, has only a corresponding UE to receive.
As shown in Figures 2 and 3, be MBMS multicast pattern operation flow and broadcast mode operation flow schematic diagram.Can see, in MBMS multicast service flow process, the user add and session to begin two steps be separate, that is to say a user may be before session begins also may the session after session begins carry out in multicast service of adding.
In present system, connect according to (RRC Connected) RRC and whether to set up, UE is divided into two kinds of Idle pattern and RRC Connected patterns.Do not have to set up the UE that RRC is connected with UTRAN equipment and be in the Idle pattern, the sign that the UE under this pattern can only be by Non-Access Stratum (NAS) (for example: international mobile subscriber identity (IMSI)) distinguish; Set up the UE that RRC is connected with UTRAN equipment and be in RRC Connected pattern, the UE under this pattern has distributed RNTI, as the sign of this UE on Common transport channel.
UE for Radio Resource control connection pattern, the type of level that connects according to RRC and the UE transmission channel that can use is divided into different conditions with UE again: CELL_PCH, CELL_FACH, the UE of CELL_DCH state can distinguish on the level of sub-district, and the UE of URA_PCH state can distinguish on UTRAN Registration Area (URA) level.The UE of CELL_DCH state has been assigned with special-purpose physical channel, can use dedicated transmission channel and shared channel, and their combination.The UE of CELL_FACH state is at a descending continuous public transmission channel of monitoring (FACH), the common signal channel (RACH) that uplink assignment is default wanted.The mode that the UE of CELL_PCH and URA_PCH state adopts discontinuous reception (DRX) is by relevant Page Indication Channel (PICH) monitoring paging channel (PCH), under this two states without any up activity.
Different according to the pattern of UE and state, before session begins with add the MBMS business during session is carried out different processing arranged.Simultaneously can see that also UE possesses different wireless access capabilities under the different states.
No matter be the session process that begins when starting after subscriber to joining multicast service, or the user is when adding multicast service in the middle of session is carried out, under two kinds of situations, the UE of wireless access capability deficiency can face the problem of selecting between multiple business.
1, session that should business behind the subscriber to joining multicast service process that begins starts:
Begin in the process in session, when UTRAN equipment decision foundation point arrived the radio bearer of multiple spot, UTRAN sent dedicated notification message and informs the current UE that receives the CELL_DCH state of the MBMS business of using the transmission of PTM pattern on Dedicated Signaling Channel.Can not parallel receive MBMS the UE of CELL_DCH state of the professional and activity that existed notify the user after receiving this notification message, make a choice between ongoing activity and new MBMS business by the user.If the user determines to receive new MBMS business, UE will read the MBMS point at preset time and obtain the MBMS control information to multiple spot control channel (MCCH).UE begins to receive the MBMS business according to the control information that receives.
2, the user adds this business in the session of multicast service is carried out:
If a session well afoot that uses the PTM transmission mode, after user's adition process was finished, UE initiated the reception of PTM radio bearer.If what the session of well afoot was used is the PTP transmission mode, UTRAN sets up the PTP radio bearer.
Generally, the process of adding MBMS business comprises following step in the session:
1, the UE of Idle pattern at first carries out the process that RRC connects foundation; The UE of CELL_PCH and URA_PCH state at first carries out cell updating course.
2, UE initiates the NAS adition process.
3, UE of SGSN notice UTRAN has added certain MBMS business, and UTRAN judges the transmission mode that this business adopts:
If a) continue to use the PTM transmission mode:
Ai) UTRAN sends on DCCH and comprises the isoparametric MBMS dedicated notification message of service identification, reason (session carry out in), the UE of notice CELL_DCH state;
Aii) if receiving the UE of the CELL_DCH state of above-mentioned message can not receive the professional and current business of MBMS simultaneously then notify the user, between current business and MBMS business, make a choice by the user.If the user determines to receive this new MBMS business, UE will read MCCH in the predefined time, obtain MBMS business information and MBMS radio bearer information;
Aiii) UE begins to receive the PTM radio bearer according to the MBMS business information and the MBMS radio bearer information that obtain.
B) if continue to use the PTP transmission mode, UTRAN and UE set up the PTP radio bearer by suitable RRC process.
The process of adding MBMS business as shown in Figure 4 in the session of present technical scheme.
This shows that there is following problem in the prior art scheme:
For the utilization of Radio Resource, the uncontrollable UE of UTRAN equipment chooses specific sub-district, can not optimize the use of Radio Resource.
Summary of the invention
Purpose of the present invention just provides a kind of method, makes that land radio access web can be controlled this subscriber equipment and choose specific sub-district when a subscriber equipment adds business in the MBMS session.
For this reason, the present invention adopts following technical scheme:
Add the method for multicast in a kind of radio communication, may further comprise the steps:
A, user device applies add the just multicast service in session;
B, wireless access network equipment are controlled the optimum subdistrict that described subscriber equipment selects frequency layer to concentrate;
C, described subscriber equipment are set up the radio bearer of the multicast service of application adding in the optimum subdistrict of selecting, receive described multicast packet.
Described step a connects initiation NAS adition process by RRC and finishes.
Described step b further comprises:
B11, land radio access web send a notification message by Dedicated Control Channel, and the non-cell forward access channel status subscriber equipment of indication reads the information that the multimedia broadcast-multicast service point is concentrated to the frequency layer on the multiple spot control channel in this message;
B12, subscriber equipment judge whether current area is optimum subdistrict, if not, enters step b13, if enter step b14 according to the information that obtains;
B13, subscriber equipment switch to this optimum subdistrict;
B14, subscriber equipment remain on current area.
Described step b further comprises:
B110, land radio access web send a notification message by common down channel, indication continues the cell forward access channel status subscriber equipment of this common down channel of monitoring in this message, reads the information that the multimedia broadcast-multicast service point is concentrated to the frequency layer on the multiple spot control channel;
B120, subscriber equipment judge whether current area is optimum subdistrict, if not, enters step b130, if enter step b140 according to the information that obtains;
B130, subscriber equipment switch to this optimum subdistrict;
B140, subscriber equipment remain on current area.
Described step b further comprises:
B21, land radio access web send a notification message by Dedicated Control Channel, comprise the information that frequency layer is concentrated in this message;
B22, non-cell forward access channel status subscriber equipment judge whether current area is optimum subdistrict, enters step b23 if not, if enter step b24 according to the information that obtains;
B23, subscriber equipment switch to this optimum subdistrict;
B24, subscriber equipment remain on current area.
Described step b further comprises:
B210, land radio access web send a notification message by common down channel, comprise the information that frequency layer is concentrated in this message;
B220, cell forward access channel status subscriber equipment judge whether current area is optimum subdistrict, enters step b230 if not, if enter step b240 according to by continuing the information that the described common down channel of monitoring obtains;
B230, subscriber equipment switch to this optimum subdistrict;
B240, subscriber equipment remain on current area.
Described step b further comprises:
B31, land radio access web are put periodically transmission frequency layer concentrated message of multiple spot control channel by multimedia broadcast-multicast service;
After b32, subscriber equipment add multicast service, read the frequency layer concentrated message that multimedia broadcast-multicast service is put the multiple spot control channel, and according to the information and the measurement that obtain, judge whether current area is optimum subdistrict, enter step b33 if not, if enter step b34;
B33, subscriber equipment switch to this optimum subdistrict;
B34, subscriber equipment remain on current area.
Described method further comprises before the step c:
When knowing that a subscriber equipment has added the ongoing multicast service of session, wireless access network equipment starts a timer, when timer expiry, wireless access network equipment judges that this subscriber equipment finished the operation of selecting the optimum subdistrict that optimized frequency layer concentrates, and the beginning notifying user equipment is set up the radio bearer of multicast service.
The present invention can allow network control come the more efficient use Radio Resource by adding professional method in the session that increases frequency layer centralized operation step, and UE is focused on the sub-district of preferred frequency layer as far as possible, can be less in other cell allocation resources.
Description of drawings
Fig. 1 is an architectural schematic in the prior art;
Fig. 2 is a MBMS multicast pattern operation flow schematic diagram in the prior art;
Fig. 3 is a MBMS broadcast mode operation flow schematic diagram in the prior art;
Fig. 4 is the schematic flow sheet that adds the MBMS business in the prior art in session;
Fig. 5 is the present invention adds the MBMS business in session a schematic flow sheet.
Embodiment
Below in conjunction with Figure of description the specific embodiment of the present invention is described.Use UE as subscriber equipment in the present embodiment.
When a UE added this business in the middle of the session of a MBMS multicast service is carried out, after the adition process of NAS was finished, UE need read the MCCH channel and obtain this MBMS business information and radio bearer information, to set up the MBMS carrying, received the MBMS data.
At this moment, but the access method that UE goes to read the MCCH channel has following several:
(1) UE periodically reads MCCH.
(2) UTRAN equipment sends the notice indication on the MICH channel, and the UE that detects the notice indication removes to read the MCCH channel.
(3) UE receives acknowledge message by NAS, finish adition process after, remove to read the MCCH channel immediately.
(4) for the UE that receives the MBMS business, by notice indication in the channel transmission band of carrying MCCH or MTCH, the UE that detects this indication removes to read the MCCH channel.
(5) for CELL_DCH state UE, UTRAN sends the MBMS dedicated notification message by downlink dedicated channels; For CELL_FACH state UE, UTRAN sends the MBMS dedicated notification message by common down channel; The UE that receives this message removes to read the MCCH channel.
As shown in Figure 5, schematic flow sheet of the present invention, as seen from the figure, technical scheme of the present invention specifically comprises following content:
User device applies adds multicast service, will judge at first whether this UE is in the RRC connection mode, if there is not RRC to connect, then needs to set up RRC in advance and connects;
Subsequently, UE adds multicast service by the NAS process.
Here, we increase the content that UTRAN control UE selects the optimum subdistrict in the preferred frequency layer, and wherein, UTRAN control UE selects the implementation one of preferred frequency layer to be:
UTRAN sends dedicated notification message by DCCH, and indication UE reads the information that the frequency layer on the MCCH is concentrated in message.For the UE of CELL_FACH state, this dedicated notification message sends by common down channel, and the UE that continues this common down channel of monitoring detects the information of going to read after the dedicated notification message on the MCCH channel.Then, UE reselects the sub-district according to the information that obtains, if found than better sub-district, the current sub-district of being stationed according to cell reselection rules then switch to better sub-district.
The dedicated notification message here can be the MBMS dedicated notification message, comprises parameters such as service identification, reason (session carry out in) in this message.
UTRAN control UE selects the implementation two of preferred frequency layer to be:
UTRAN sends dedicated notification message by DCCH, comprises the information that frequency layer is concentrated in message.For the UE of CELL_FACH state, this dedicated notification message sends by common down channel, promptly obtains the frequency layer concentrated message after the UE of lasting this common down channel of monitoring detects dedicated notification message.Then, UE reselects the sub-district according to the information that obtains, if found than better sub-district, the current sub-district of being stationed according to cell reselection rules then switch to better sub-district.
The dedicated notification message here can be the MBMS dedicated notification message, comprises service identification, frequency information in this message, parameters such as deviant.
UTRAN control UE selects the implementation three of preferred frequency layer to be:
UTRAN is periodic transmission frequency layer concentrated message on MCCH, and UE receives acknowledge message by NAS, finish adition process after, remove to read the MCCH channel immediately and obtain the frequency layer concentrated message.Then, UE reselects the sub-district according to the information that obtains, if found than better sub-district, the current sub-district of being stationed according to cell reselection rules then switch to better sub-district.
UTRAN begins to set up the radio bearer of multicast service after finishing control UE selects the step of preferred frequency layer.
UTRAN judges that UE finishes the method for operating of selecting optimized frequency layer: start a timer when UTRAN knows that a UE has added the ongoing multicast service of session, when timer expiry, UTRAN judges that this UE has finished the operation of selecting optimized frequency layer, begins to set up the radio bearer of multicast service.
The present invention can allow network control come the more efficient use Radio Resource by adding professional method in the session that increases frequency layer centralized operation step, and UE is focused on the sub-district that preferred frequency layer is concentrated as far as possible, can be less in other cell allocation resources.
Claims (8)
1, add the method for multicast in a kind of radio communication, it is characterized in that may further comprise the steps:
A, user device applies add the just multicast service in session;
B, wireless access network equipment are controlled the optimum subdistrict that described subscriber equipment selects frequency layer to concentrate;
C, described subscriber equipment are set up the radio bearer of the multicast service of application adding in the optimum subdistrict of selecting, receive described multicast packet.
2, the method for claim 1 is characterized in that described step a, connects initiation NAS adition process by RRC and finishes.
3, the method for claim 1 is characterized in that described step b, further comprises:
B11, land radio access web send a notification message by Dedicated Control Channel, and the non-cell forward access channel status subscriber equipment of indication reads the information that the multimedia broadcast-multicast service point is concentrated to the frequency layer on the multiple spot control channel in this message;
B12, subscriber equipment judge whether current area is optimum subdistrict, if not, enters step b13, if enter step b14 according to the information that obtains;
B13, subscriber equipment switch to this optimum subdistrict;
B14, subscriber equipment remain on current area.
4, the method for claim 1 is characterized in that described step b, further comprises:
B110, land radio access web send a notification message by common down channel, indication continues the cell forward access channel status subscriber equipment of this common down channel of monitoring in this message, reads the information that the multimedia broadcast-multicast service point is concentrated to the frequency layer on the multiple spot control channel;
B120, subscriber equipment judge whether current area is optimum subdistrict, if not, enters step b130, if enter step b140 according to the information that obtains;
B130, subscriber equipment switch to this optimum subdistrict;
B140, subscriber equipment remain on current area.
5, the method for claim 1 is characterized in that described step b, further comprises:
B21, land radio access web send a notification message by Dedicated Control Channel, comprise the information that frequency layer is concentrated in this message;
B22, non-cell forward access channel status subscriber equipment judge whether current area is optimum subdistrict, enters step b23 if not, if enter step b24 according to the information that obtains;
B23, subscriber equipment switch to this optimum subdistrict;
B24, subscriber equipment remain on current area.
6, the method for claim 1 is characterized in that described step b, further comprises:
B210, land radio access web send a notification message by common down channel, comprise the information that frequency layer is concentrated in this message;
B220, cell forward access channel status subscriber equipment judge whether current area is optimum subdistrict, enters step b230 if not, if enter step b240 according to by continuing the information that the described common down channel of monitoring obtains;
B230, subscriber equipment switch to this optimum subdistrict;
B240, subscriber equipment remain on current area.
7, the method for claim 1 is characterized in that described step b, further comprises:
B31, land radio access web are put periodically transmission frequency layer concentrated message of multiple spot control channel by multimedia broadcast-multicast service;
After b32, subscriber equipment add multicast service, read the frequency layer concentrated message that multimedia broadcast-multicast service is put the multiple spot control channel, and according to the information and the measurement that obtain, judge whether current area is optimum subdistrict, enter step b33 if not, if enter step b34;
B33, subscriber equipment switch to this optimum subdistrict;
B34, subscriber equipment remain on current area.
8, the method for claim 1 is characterized in that further comprising before the step c:
When knowing that a subscriber equipment has added the ongoing multicast service of session, wireless access network equipment starts a timer, when timer expiry, wireless access network equipment judges that this subscriber equipment finished the operation of selecting the optimum subdistrict that optimized frequency layer concentrates, and the beginning notifying user equipment is set up the radio bearer of multicast service.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100561163A CN100359988C (en) | 2004-08-12 | 2004-08-12 | Method for joining multicast in radio communication |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100561163A CN100359988C (en) | 2004-08-12 | 2004-08-12 | Method for joining multicast in radio communication |
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| CN100359988C true CN100359988C (en) | 2008-01-02 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101296408B (en) * | 2007-04-23 | 2013-06-05 | 中兴通讯股份有限公司 | Method and system for controlling frequency layer convergence of multimedia broadcast multicast service |
| US8219119B2 (en) * | 2007-06-13 | 2012-07-10 | Innovative Sonic Limited | Method and apparatus for improving DRX operation in a wireless communications system |
| MX2010008405A (en) | 2008-02-01 | 2010-09-28 | Interdigital Patent Holdings | Method and apparatus for enabling cell reselection for wtru operating in discontinuous reception. |
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| WO2002098160A1 (en) * | 2001-05-31 | 2002-12-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement and computer program poduct for determining criterions for selection of an appropriate cell layer for a user equipment and for reducing the number of inter-frequency hard handovers for the user equipment |
| EP1318690A1 (en) * | 2001-12-05 | 2003-06-11 | Nokia Corporation | Call control method and arrangement |
| CN1464650A (en) * | 2002-06-21 | 2003-12-31 | 阳庆电子股份有限公司 | Method for automatic selecting working channel to avoid mutual interference of wireless network arrangement |
| US20040081125A1 (en) * | 2002-10-28 | 2004-04-29 | Ranta-Aho Karri | System and method for providing selection diversity for multicasting content |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002098160A1 (en) * | 2001-05-31 | 2002-12-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement and computer program poduct for determining criterions for selection of an appropriate cell layer for a user equipment and for reducing the number of inter-frequency hard handovers for the user equipment |
| EP1318690A1 (en) * | 2001-12-05 | 2003-06-11 | Nokia Corporation | Call control method and arrangement |
| CN1464650A (en) * | 2002-06-21 | 2003-12-31 | 阳庆电子股份有限公司 | Method for automatic selecting working channel to avoid mutual interference of wireless network arrangement |
| US20040081125A1 (en) * | 2002-10-28 | 2004-04-29 | Ranta-Aho Karri | System and method for providing selection diversity for multicasting content |
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