CN101052203B - Realizing method for multimedia broadcast multicast service - Google Patents
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- H04W36/0005—Control or signalling for completing the hand-off
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- H—ELECTRICITY
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- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
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Abstract
The method is used for keeping connection between UE and LTE network when the UE receives MBMS in SFN network, and comprises: when UE receives MBMS in SFN, it uses a compress mode or uses the data scheduling of schedule unit to get the idle transmission time slot between two neighboring frames or in the transmission gap in one frame; the user's device is switched to the LTE network in said idle transmission time slot in order to make measurement, registration or to answer the call; the user's terminal can also be switched to LTE network in the idle transmission time slot to make cell reselection and location update; when receiving a call, the user's terminal can be switched to the LTE network to reject or receive the call message.
Description
Technical field
The present invention relates to multimedia broadcasting, multicasting technology in the wireless network, more particularly, relate to a kind of implementation method of multimedia broadcast-multicast service.
Background technology
Multicast and broadcasting are a kind of technology that transmits data from a data source to a plurality of targets.In traditional mobile communications network, sub-district multicast service or broadcasting service (CBS, i.e. Cell Broadcast Service) allow low bit rate data to share broadcast channel to all users' transmissions by the sub-district, and this kind business belongs to information series business.
Now, people no longer are satisfied with phone and messaging service to the demand of mobile communication, and along with the fast development of internet (Internet), a large amount of mobile multi-media services emerge.The some of them mobile multi-media service requires a plurality of users can receive identical data, for example video request program, television broadcasting, video conference, online education, interactive game etc. simultaneously.These mobile multi-media services are compared with general data service, have characteristics such as data volume is big, longer duration, delay sensitive.Present Internet protocol (IP) multicast and broadcast technology only are applicable to wired IP communication network, be not suitable for mobile communications network, because mobile communications network has particular network structure, functional entity and wave point, these are all different with the wire communication IP network.
In order to effectively utilize the mobile communications network resource, 3G (Third Generation) Moblie global standards tissue (3GPP) has proposed MBMS (the Multimedia Broadcast MulticastService of mobile communications network, be multimedia broadcast-multicast service), thereby in mobile communications network, provide the point-to-multipoint service that sends data by a data source 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 that 3GPP proposes 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.
Fig. 1 is for supporting the wireless network architecture schematic diagram of broadcasting/packet service, as shown in Figure 1, among the existing 3GPP, support that the wireless network entity of broadcasting/packet service is a broadcasting/packet service server (BM-SC) 101, BM-SC101 is by Gmb interface or Gi interface and critical point GPRS Support Node (GGSN, Gateway GPRSSupport Node) 102 link to each other, and a BM-SC101 can link to each other with a plurality of GGSN102; GGSN102 links to each other by Gn/Gp interface and Serving GPRS Support Node (SGSN, Serving GPRS Support Node) 103, and a GGSN102 can link to each other with a plurality of SGSN103; SGSN103 can link to each other with universal mobile telecommunications system (UMTS) land radio access web (UTRAN) 104 by the Iu interface, UTRAN104 links to each other with UE (subscriber equipment) 106 by the Uu interface then, SGSN103 also can strengthen wireless access network (GERAN) 105 by Iu/Gb interface and global system for mobile communications and link to each other, and GERAN105 links to each other with UE107 by Um Interface then.Wherein, GGSN and SGSN belong to the node in the core net in the wireless network (CN).
The network configuration that provides from Fig. 1 as can be seen, in order to support the MBMS business, in 3-G (Generation Three mobile communication system), increased the mobile network functional entity--the broadcasting/packet service server, be BM-SC, it is content provider's a inlet, be used for authorizing and initiating the MBMS business, and plan transmits the MBMS content to schedule at mobile network.In addition, on functional entitys such as UE, UTRAN, GERAN, SGSN, GGSN, increased the function relevant with MBMS.
MBMS comprises multicast pattern and broadcast mode, and wherein 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 pattern and broadcast mode exist on business demand, cause also difference of operation flow separately, Fig. 2 is the operation flow schematic diagram of MBMS multicast pattern, Fig. 3 is the operation flow schematic diagram of MBMS broadcast mode.
As can be seen from Figure 2, the processing procedure that relates to of MBMS multicast service comprises: signatory (Subscription), service declaration (Service announcement), user add that (Joining), session begin (Session Start), MBMS notice (MBMS notification), data transmit (Datatransfer), conversation end (Session Stop) and the user withdraws from (Leaving).Wherein, signatory process is used for setting up the relation between user and the service supplier, allows the user subscribe to required MBMS service in advance; Service declaration process is used for promptly notifying user MBMS the relevant information of business by the current service that can provide of BM-SC declaration; User's adition process is a MBMS activation of service process, UE is in adition process, informing network self is ready to become the member of current multicast group, receives the data of corresponding MBMS business, and this adition process can be created the MBMS UE context of record UE information in the UE of network and adding multicast group; Session began the MBMS notification procedure and is used for being about to begin by RNC (Radio Network Controller, radio network controller) notice UE MBMS multicast conversation; In data transfer procedure, BM-SC transfers data to UE by the bearing resource that session begins to set up in the process, the MBMS business has two kinds of patterns when transmitting between UTRAN and UE: point-to-multipoint (PTM) pattern and point-to-point (PTP) pattern, the PTM pattern sends identical data by MBMS point-to-multipoint service channel (MTCH), 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; The conversation end process is used for the bearing resource that the session process that begins is set up is discharged; The user withdraws from process makes the subscriber in the group leave multicast group, i.e. user's receiving multicast data no longer, and this process can be with corresponding MBMS UE context deletion.
As shown in Figure 3, processing procedure that the MBMS broadcasting service relates to and MBMS multicast service are similar, just before session begins, do not need to carry out signatory process and user's adition process, and, after conversation end, do not need to carry out the user and withdraw from process.
At present, the MBMS system is an important attribute of 3GPP Release 6 versions, and the MBMS business is carried by existing transmission channel and physical channel, uses existing frequency and bandwidth etc.Providing of MBMS business can be divided into three phases (phase):
Phase I is the period before session begins, and in this stage, network does not provide any MBMS business, and the user may constantly attempt reading the MBMS announcement information, and in this stage, the user can add any business at any time.
To be UTRAN receive session (Session Start) sets up radio bearer (RB) to UTRAN for this business till from core net second stage.It is professional and carry out counting (counting) process to MBMS is professional to notify the user to receive MBMS at this stage UTRAN, so that the decision bearer types.UE can respond counting in this stage, receives the MCCH control channel to obtain the phase related control information.
Three phases is the of paramount importance stage of MBMS, and in this stage, the user begins to receive the MBMS business, obtains session until UTRAN from core net and stops (Session Stop).
In said process, UTRAN sends the MBMS control information by MBMS control channel (MCCH) to UE.Because present R6MBMS uses same carrier wave frequency range (abbreviation carrier frequency) with the WCDMA system, therefore, the transmission of control information is to be undertaken by the carrier wave frequency range that has 3G network now on the MCCH channel, and promptly there is not the problem of selecting carrier wave frequency range to receive the MBMS control information in UE.
Because the type of service that relates to of MBMS system is quite a lot of, from background service (such as software download), to real time business (such as video tour etc.).Along with increasing gradually of service provider (SP), professional number can constantly increase.And MBMS is the enhancing of existing WCDMA system at present, and it has used the resource of existing WCDMA, has promptly used existing transmission channel and physical channel.Its consequence is that MBMS has taken a large amount of existing Radio Resources.Influence just is present in two aspects like this: the one, and existing business can be subjected to great influence; The 2nd, the type of service that MBMS can provide simultaneously has been subjected to greatly restriction.
Present MBMS business mainly is in communication systems such as WCDMA, CDMA2000, UTRA TDD or TD-SCDMA and realizes in its follow-up various evolvement networks.When these systems realized the MBMS business, the resource of frequency range of system mainly was to adopt up-downgoing resource symmetrical distribution when distributing.That is to say, if descending how many resources of frequency range of distribution mean and uply also will distribute same resource.Yet most of MBMS business all is some data services, and the uplink and downlink resource that takies is asymmetric, particularly for some MBMS business, as mobile phone TV services, not use ascending resource, the ascending resource that VOD service takies is also much smaller than downlink resource.If utilize existing 3G system or LTE system to realize that the MBMS business has caused the huge waste of ascending resource so.
For solving the existing 3G of utilization system or its Long Term Evolution (LTE, being Long Term Evolution) system realizes the huge waste of the ascending resource that the MBMS business causes, proposed to utilize that (Single Frequency Network SFN) carries the scheme of MBMS business by single frequency network.Utilize the cooperation between descending carrier that distributes separately and the up-downgoing carrier wave three who has symmetry now, form a new single carrier broadcast/multicast system.Distribute separately in the system of carrying MBMS business, independent MBMS carrier frequency can carry more MBMS business, for operator, fully, effectively and reasonably utilize Radio Resource, the interests that can obtain are far longer than the cost that independent frequency spectrum is paid, and, more help Communication Development from now on, making based on the MBMS of mobile phone is professional becomes main flow as mobile TV etc.The resource of frequency range of single frequency network is one section fixing resource of frequency range, and it has only downlink resource, and without any ascending resource, and issuing of MBMS business datum mainly is the form that adopts broadcasting.Introduce that single frequency network can be avoided because the ascending resource utilance huge waste of the high system resource that causes not, be convenient to the utilization of resources of system.
Therefore introduce new carrier wave frequency range carrying MBMS business, and with the co-ordination of original MBMS carrier wave will be that a solution is eated dishes without rice or wine to the good method of MBMS volume of business restriction.
LTE network among the present invention, residing network when being the UE operate as normal, business such as under this network, can converse, and under the SFN network, can only carry out the reception of MBMS business.When UE did not receive the MBMS business, it had only in the time of need carrying out the reception of MBMS business in the LTE network, and UE just can enter the SFN net.In the prior art, when UE registers, just can't receive the signal of SFN network again in the LTE network, thereby can cause video flowing to interrupt.
Summary of the invention
The present invention will solve the above-mentioned defective of prior art, to guarantee still can to keep normally associate with the LTE network when subscriber equipment receives the MBMS business in the SFN network.
The technical solution adopted for the present invention to solve the technical problems is: the implementation method that a kind of multimedia broadcast-multicast service is provided, wherein, subscriber equipment is the receiving multimedia broadcast multicast service in the SFN network, in the process of described receiving multimedia broadcast multicast service, obtain idle transmission intercal time slot as required; Paging is measured, registers or responded to described subscriber equipment as required in corresponding transmission intercal time slot switches to second network outside the SFN network.
Can in the transmission gap in the transmission gap between adjacent two frames or the frame, obtain idle transmission intercal time slot among the present invention; Specifically can obtain described transmission intercal time slot, or obtain described transmission intercal time slot, or obtain described transmission intercal time slot by additive method by the data dispatch of scheduling unit by adopting compact model.
Among the present invention, described subscriber equipment is pressed predetermined period or because of being scheduled to the triggering of thing, is carried out described measurement and switch to described second network from the SFN network.
Among the present invention, if the result who measures shows that described subscriber equipment need carry out the sub-district gravity treatment, then described subscriber equipment switches to second network and carries out the sub-district gravity treatment at corresponding transmission intercal time slot.If the result of described measurement shows described subscriber equipment and need carry out location area updating that then described subscriber equipment switches to second network at corresponding transmission intercal time slot and carries out location area updating.
Among the present invention, if sub-district gravity treatment or location area updating have taken place in the SFN network described subscriber equipment, then described subscriber equipment switches to second network with to the SFN of its notifying user equipment network cell information at corresponding transmission intercal time slot.
Among the present invention, when a paging at described subscriber equipment is arranged in described second network, described second network can be according to the system information of described subscriber equipment in the SFN network, can send message by the SFN network to described subscriber equipment by the SFN network according to the system information of described subscriber equipment in the SFN network to described two networks; Described subscriber equipment can switch to described second network at corresponding transmission intercal time slot, to respond this beep-page message according to system information entrained in this message.At this moment,, then switch to the message that described second network sends a rejection, return the SFN network then and continue the receiving multimedia broadcast multicast service at corresponding transmission intercal time slot if described subscriber equipment will be rejected this paging; If described subscriber equipment will receive this paging, then switch to the reception of carrying out corresponding service in described second network at corresponding transmission intercal time slot; If described subscriber equipment does not wish to respond this beep-page message, then be retained in and do not carry out any action in the described SFN network.
Among the present invention, subscriber equipment is carried out above-mentioned measurement, registration or response paging by channel, program or certain group technologies such as probability that network side is receiving according to subscriber equipment in batches.
Among the present invention, described second network can be LTE network, WCDMA Access Network, GSM/GPRS Access Network or other Access Network.
By such scheme as can be known, adopted technical scheme of the present invention after, when paging etc. be measured, register or be responded to subscriber equipment during the receiving multimedia broadcast multicast service, can in LTE network (or other networks) in the SFN network.And, initiate one in the LTE network (or other networks) during at the calling of this UE or paging, network can send to this subscriber equipment with page notification information according to present residing position of this subscriber equipment and sub-district in the SFN network, subscriber equipment can respond as required accordingly.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is a structural representation of supporting the wireless network of broadcasting/packet service;
Fig. 2 is the operation flow schematic diagram of MBMS multicast pattern;
Fig. 3 is the operation flow schematic diagram of MBMS broadcast mode;
Fig. 4 is the schematic diagram that obtains the transmission intercal time slot by compress mode;
Fig. 5 is the flow chart of measuring by predetermined period in a preferred embodiment of the invention.
Embodiment
By the content of background technology part as can be known, when UE switches to from the LTE network in the SFN network or different, and the UE of single-receiver can not receive the information of two networks simultaneously, so it and getting in touch of LTE network will be interrupted.
And among the present invention, when UE receives MBMS when professional in the SFN network, free time that can be between transmission intercal (between two frames or the transmission gap in frame) switches on the frequency range of LTE network, measures, registers or respond paging.This transmission intercal time slot can be by adopting compact model method (as speeding up data transmission speed, strengthen method such as instantaneous transmitted power), or the data dispatch of scheduling unit, or or other method realize.
With the compact model is example, at FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD)) under, UE need carry out different-frequency measure or isosystem measurement, because a cover transceiver can only be operated on one group of transmitting-receiving frequency simultaneously, if will measure to the signal of other frequency, its receiver need quit work, and measures so that frequency is switched to target frequency, in order to guarantee the normal transmission of signal, need to adopt compact model, original signal is sent in the residue transmitting time.When needing to switch between system, UE is with compressed mode operation in the UTRAN104 indication, and this method is created at interval by a part of closing transmission 10ms frame, sets apart for UE measures, registers or responds paging.By reducing spread spectrum coefficient, from data, remove a plurality of bits (puncture), or use high-level scheduling as customer service distribution time slot still less, can realize compressed mode operation.As shown in Figure 4, in the frame of compression, the length of transmission intercal time slot 200 (being defined as Nfirst to Nlast time slot) is not used in transfer of data.In the frame of compression, will improve instantaneous transmitted power, during reducing, keep quality (BER, FER etc.) in processing gain.Wherein, the performance number of raising depends on the method that reduces the transmission time use.Higher protocol layer is determining the frame number that uses in the compact model.The frame of compression can be set to regular generation, also can be arranged to take place as required.The speed and the type of the frame of compression can change, and depend on environment and measurement requirement.Can be every kind of pattern, the wireless access technology compress mode signal different that UE supports for up path and downlink path reach with the frequency range definition.In the typical case used, under compact model, upstream data rate doubled (frame that uses half), and downstream data rate is set to more than the twice by higher protocol layer.
Embodiment 1: in a preferred embodiment of the present invention, the relation between UE and SFN network and the LTE network is as follows:
When UE receives the MBMS business in the SFN network, can obtain the transmission intercal time slot by adopting the data dispatch of compact model or scheduling unit.As shown in Figure 5, be to obtain the transmission intercal time slot in the present embodiment by the predetermined cycle.
UE can switch to the LTE network at this transmission intercal time slot and measure, and as shown in Figure 5, in the present embodiment, is to measure by the predetermined cycle, and the time and the cycle of its triggering are determined by network side; During concrete enforcement, also can be not according to predetermined period, and trigger by specific incident, for example in order to finish a certain scheduled operation, just obtain corresponding transmission intercal time slot, switch to the LTE network at this transmission intercal time slot that obtains then and finish corresponding operation by scheduling.For example, channel, program or certain group technologies such as probability that network side can receive according to UE, in batches to UE measure, the operation of registration etc.
Embodiment 2: if UE is in and moves, and shifted out the sub-district of originally in the LTE network, registering, then UE shows that through above-mentioned measurement UE need initiate the sub-district gravity treatment, at this moment, UE switches to the LTE network at corresponding transmission intercal time slot and carries out the sub-district gravity treatment, specifically can be at this transmission intercal time slot, or finish the sub-district reselection operation at next transmission intercal time slot.
Embodiment 3: if UE is in and moves, and shifted out the lane place of originally in the LTE network, registering, then the result of above-mentioned measurement can show that UE need initiate location area updating, and at this moment, UE can switch to the LTE network at corresponding transmission intercal time slot and carry out location area updating.
Embodiment 4: because the UE most time is the MBMS business that receives in the SFN network, during if UE is in and moves, it also can upgrade or the sub-district gravity treatment in the occurrence positions district in the SFN network, at this moment, UE can switch to the LTE network at corresponding transmission intercal time slot, and notifies its new cell information at the SFN network to the LTE network.
Embodiment 5: when UE received the MBMS business in the SFN network, as a paging at this UE is arranged in the LTE network, then the LTE network can send message to this UE according to the system information of UE in the SFN network in the SFN network; After UE receives this message,
(1) if reject this paging, then can switch to the LTE network at corresponding transmission intercal time slot, send the message of a rejection, return the reception that the SFN network is proceeded the MBMS business then;
(2), then can switch to and carry out professional reception in the LTE network at corresponding transmission intercal time slot if decision receives this paging in the LTE network;
(3), then can be retained in and not carry out any action in the SFN network if do not wish to respond this beep-page message.
By the foregoing description as can be known, among the present invention, when UE receives the MBMS business in the SFN network when, can switch at the transmission intercal time slot and measure, register or respond paging etc. in the LTE network.Like this, when initiating one in the LTE network during at the calling of this UE or paging, network can send to this UE with page notification information according to present residing position of this UE and sub-district in the SFN network.
Second network among the present invention is an example with the LTE network, and in the application of reality, this second network also can be other network except that the LTE network, as GSM network, GPRS network etc.
Claims (10)
1. the implementation method of a multimedia broadcast-multicast service, wherein, subscriber equipment is the receiving multimedia broadcast multicast service in single frequency network, it is characterized in that,
In the process of described receiving multimedia broadcast multicast service, obtain idle transmission intercal time slot as required;
Paging is measured, registers or responded to described subscriber equipment as required in corresponding transmission intercal time slot switches to second network outside the single frequency network;
Wherein, when a paging at described subscriber equipment is arranged in described second network, the entrained system information of message that described subscriber equipment sends by single frequency network according to described second network switches to described second network at corresponding transmission intercal time slot, to respond this beep-page message.
2. method according to claim 1 is characterized in that, wherein is to obtain idle transmission intercal time slot in transmission gap between adjacent two frames or the transmission gap in frame.
3. method according to claim 1 is characterized in that, described subscriber equipment is pressed predetermined period or because of being scheduled to the triggering of thing, carried out described measurement and switch to described second network from single frequency network.
4. method according to claim 1 is characterized in that, if the result who measures shows that described subscriber equipment need carry out the sub-district gravity treatment, then described subscriber equipment switches to second network and carries out the sub-district gravity treatment at corresponding transmission intercal time slot.
5. method according to claim 1 is characterized in that, need carry out location area updating if the result of described measurement shows described subscriber equipment, and then described subscriber equipment switches to second network at corresponding transmission intercal time slot and carries out location area updating.
6. method according to claim 1, it is characterized in that, if sub-district gravity treatment or location area updating have taken place in single frequency network described subscriber equipment, then described subscriber equipment switches to second network with the single frequency network cell information to its notifying user equipment at corresponding transmission intercal time slot.
7. method according to claim 1 is characterized in that, described second network is the system information of the described second network based described subscriber equipment in single frequency network by the message that single frequency network sends, by the message of single frequency network to described subscriber equipment transmission.
8. method according to claim 7 is characterized in that, when described subscriber equipment is received this beep-page message in single frequency network,
If described subscriber equipment will be rejected this paging, then switch to the message that described second network sends a rejection at corresponding transmission intercal time slot, return single frequency network then and continue the receiving multimedia broadcast multicast service;
If described subscriber equipment will receive this paging, then switch to the reception of carrying out corresponding service in described second network at corresponding transmission intercal time slot;
If described subscriber equipment does not wish to respond this beep-page message, then be retained in and do not carry out any action in the described single frequency network.
9. method according to claim 1 is characterized in that, described method also comprises: UE is carried out above-mentioned measurement, registration or response paging by channel, program or certain group technologies such as probability that network side is receiving according to UE in batches.
10. according to each described method among the claim 1-9, it is characterized in that described second network is LTE network, WCDMA Access Network or GSM/GPRS Access Network.
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| CN2006100602035A CN101052203B (en) | 2006-04-06 | 2006-04-06 | Realizing method for multimedia broadcast multicast service |
| PCT/CN2007/001090 WO2007112696A1 (en) | 2006-04-06 | 2007-04-04 | Method and system for realizing multimedia broadcast multicast service |
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| CN2006100602035A CN101052203B (en) | 2006-04-06 | 2006-04-06 | Realizing method for multimedia broadcast multicast service |
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| CN101052203B true CN101052203B (en) | 2011-06-08 |
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| CN104185228B (en) * | 2013-05-28 | 2018-03-23 | 中国电信股份有限公司 | A kind of method and system for searching for network |
| CN103533592B (en) * | 2013-10-29 | 2015-09-30 | 宇龙计算机通信科技(深圳)有限公司 | Multimode terminal and communication means |
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| CN106535331B (en) * | 2016-12-26 | 2020-07-14 | 惠州Tcl移动通信有限公司 | Communication method and system of dual-card dual-standby mobile phone |
| CN110167066B (en) * | 2018-02-14 | 2022-09-02 | 华为技术有限公司 | Data transmission method and device |
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| CN1723635A (en) * | 2002-12-10 | 2006-01-18 | 京瓷株式会社 | Wireless communication terminal and handoff judgment method |
| CN1574949A (en) * | 2003-06-24 | 2005-02-02 | 诺基亚公司 | Time-divided transmission between adjacent cells |
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Also Published As
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| WO2007112696A1 (en) | 2007-10-11 |
| CN101052203A (en) | 2007-10-10 |
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