CN100389615C - Method for decentralizing frequency level of user equipment in multimedia broadcasting/group broadcasting service - Google Patents
Method for decentralizing frequency level of user equipment in multimedia broadcasting/group broadcasting service Download PDFInfo
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Abstract
The present invention discloses a method for scattering frequency layers of user equipment in a multimedia broadcasting/multicasting service. Two or more than two frequency layer scattering algorithms are stored in the user equipment (UE). The frequency layer scattering process comprises the following procedures: A. network side transmits indication on which kind or which a plurality of kinds of frequency layer scattering algorithms are adopted to scatter the frequency layers to the UE when the operation for scattering the frequency layers needs to be performed; B. after receiving the indication, the UE determines the frequency layer scattering algorithm for scattering the frequency layers according to the indication, finds out the determined frequency layer scattering algorithm from the stored frequency layer scattering algorithms and scatter the frequency layers by using the determined frequency layer scattering algorithm. By applying the method of the present invention, the UE can flexibly select and use the frequency layer scattering algorithms to fit different network situations. Simultaneously, since the network side can control the trend of the random selection of the UE, the entire network user distribution is equalized.
Description
Technical field
The present invention relates to multimedia broadcast/group broadcast service (MBMS) realization technology, subscriber equipment (UE) carries out the method that frequency layer is disperseed (FLD) in particularly a kind of multimedia broadcast/group broadcast service.
Background technology
At present, multicast and broadcasting are a kind of 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 broadcast/multicast 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 utilance of 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.
In order to support the MBMS business, increased mobile network functional entity---broadcast multicast service center BM-SC among the mobile network newly, it is content provider's a inlet, be used for authorizing and initiating the MBMS bearer service at mobile network, and plan transmits the MBMS content to schedule.In addition, functional entitys such as subscriber equipment (UE), land radio access web (UTRAN), GERAN, SGSN, GGSN strengthen, and have increased the relevant function of MBMS.
Such network configuration is referring to Fig. 1, and Fig. 1 is for supporting the wireless network architecture schematic diagram of multicast/broadcast business.Wherein, broadcast/multicast service center (BM-SC) is passed through Gmb interface or Gi interface and gateway general packet radio service (GPRS) support node (GGSN, Gateway GPRS SupportNode) and is linked to each other, and a BM-SC can link to each other with a plurality of GGSN; GGSN links to each other by Gn/Gp interface and Serving GPRS Support Node (SGSN, Serving GPRS Support Node), and a GGSN can link to each other with a plurality of SGSN; SGSN can link to each other with universal mobile telecommunications system (UMTS) land radio access web (UTRAN) by the Iu interface, UTRAN links to each other with communication terminal by the Uu interface then, SGSN also can strengthen wireless access network (GERAN) by Iu/Gb interface and global system for mobile communications (GSM) and link to each other, and GERAN links to each other with communication terminal by Um Interface then.
MBMS comprises multicast pattern and broadcast mode.The distinctive points of multicast service and broadcasting service only is: multicast service only sends corresponding information to the user who has subscribed to some information, and the broadcasting service then user of all in wireless network sends information.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) pattern and point-to-point (PTP) pattern.The PTM pattern sends identical data by MBMS point-to-multipoint service channel (MTCH), and all add multicast service or can receive the interested UE of broadcasting service; Ptp mode sends data by dedicated transmission channel (DTCH), has only a corresponding UE to receive.
The user receives the entire flow of certain MBMS broadcasting service referring to Fig. 2, as shown in Figure 2, this flow process comprises: service statement (Service announcement), session begin (Session Start), MBMS notice (MBMS notification), transfer of data (Data transfer), conversation end (Session Stop) process.
Wherein, Service announcement process is used for by the current service that can provide of BM-SC declaration.
In the Session Start process, BM-SC is ready to transfer of data, and informing network is set up the bearing resource of corresponding core net (CN) and universal land radio access web (UTRAN).
MBMS notification process is used to notify UE MBMS multicast conversation to be about to begin.
In the Data transfer process, BM-SC transfers data to UE by the bearing resource that session begins to set up in the process.
The bearing resource that Session Stop process is used for Session Start process is set up discharges.
In broadcasting service, all preserve the bearer context of this MBMS business in each MBMS service node, this bearer context is activated in Session Start process, in Session Stop process by deexcitation.
The user receives the entire flow of certain MBMS multicast service referring to Fig. 3, as shown in Figure 3, this flow process comprises: subscription (Subscription), service statement (Service announcement), adding (Joining), session begin (Session Start), MBMS notice (MBMS notification), transfer of data (Data transfer), conversation end (Session Stop) and leave (Leaving) process.
Wherein, the Subscription process is used for allowing the user subscribe to required MBMS service in advance.
Service announcement process is used for by the current service that can provide of BM-SC declaration.
The Joining process is a MBMS activating multicast service process, UE is in the Joining process, informing network self is ready to become the member of current multicast group, receive corresponding professional multicast packet, this Joining process can be created the MBMS UE context of record UE information in the UE of network and adding multicast group.
In the Session Start process, BM-SC is ready to transfer of data, and informing network is set up the bearing resource of corresponding CN and UTRAN.
MBMS notification process is used to notify UE MBMS multicast conversation to be about to begin.
In the Data transfer process, BM-SC transfers data to UE by the bearing resource that session begins to set up in the process.
The bearing resource that Session Stop process is used for Session Start process is set up discharges.
The Leaving 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.
Begin in above-mentioned session in (Session Start) process, for conserve system resources, UTRAN can ask frequency layer of the preferential reselection procedure of UE, and the MBMS business will be transmitted on this frequency layer.Network transmits this information by the MCCH channel to UE.This process is referred to as frequency layer convergence (FLC).By this process, UTRAN can converge to UE a frequency and get on.
In above-mentioned conversation end (Session Stop) process, owing to may carry out the FLC process, therefore the UE that has much received the MBMS business all reselection procedure on certain optimized frequency layer, if but so many UE carry out non-MBMS business, will cause the greatly congested of system so, therefore the MBMS system design has gone out another process, is called frequency layer dispersion process (FLD).Network will send whether carry out the indication of FLD to UE on the MCCH channel.
At present, whether the system that only stipulated in the agreement needs to carry out the FLD process, and process is as follows:
1, network side indication UE carries out the FLD process;
2, after UE receives the FLD instruction, carry out the frequency layer dispersion process, reselect a frequency, carry out frequency layer and disperse.The mode of selecting is to select one by the pseudo-random function algorithm from optional frequency.
Usually UE has stored the algorithm of pseudo-random function, receive the FLD instruction after, just carry out described frequency layer dispersion process.
Network side can be distributed to different frequency layer with UE by the FLD process and get on, but how UE can but be had only the pseudo-random function algorithm a kind of by the method that evenly spreads on the different frequency layer by the FLD process effectively.
The defective of this method is: do not consider the distribution, cell channel quality of distribution, the sub-district of UE in the network, congested or the like diverse network situation.Because network condition is complicated and changeable, obviously has only a kind of algorithm, can not can both reach frequency layer dispersion effect preferably to all situations.For example: it may cause twice cell reselection process of UE.Because by the sub-district of selecting at random may not be a good sub-district concerning the UE that has, this moment, UE may carry out one time the cell selecting process again.Do not carry out the sub-district gravity treatment if UE is not the frequency of determining according to pseudo-random function at once, UE has to measure again to select proper cell so, makes the UE futile effort carry out pseudo-random process, has caused bigger time delay.
In a word, the scheme of existing FLD is that UE oneself decision uses a kind of fixing frequency layer decentralized algorithm to carry out the frequency layer dispersion, can not adapt to the situation of change with the network complexity.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method that subscriber equipment carries out the frequency layer dispersion in a kind of multimedia broadcast/group broadcast service, and UE can select and frequency of utilization layer decentralized algorithm flexibly in this method.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
Subscriber equipment carries out the method that frequency layer is disperseed in a kind of multimedia broadcast/group broadcast service, the two or more frequency layer decentralized algorithm of storage in user equipment (UE), and the frequency layer dispersion process may further comprise the steps:
When A, network side carried out the frequency layer scatter operation at needs, the algorithm of more than one in the described frequency layer decentralized algorithm of UE transmission employing carried out the indication that frequency layer is disperseed;
After B, UE receive this indication,, determine to carry out the frequency layer decentralized algorithm that frequency layer is disperseed, from the frequency layer decentralized algorithm of storage, find out definite frequency layer decentralized algorithm, carry out frequency layer with this frequency layer decentralized algorithm and disperse according to this indication.
Wherein, to carry out the time of frequency layer scatter operation can be to send in the multimedia broadcast/group broadcast service data procedures at: network side to described needs; Or when the multimedia broadcast/group broadcast service conversation terminal procedure; Or after the scheduled time that multimedia broadcast/group broadcast service conversation finishes.
In the described steps A, network side can send to adopt to UE more than one algorithm in the described frequency layer decentralized algorithm carry out indication that frequency layer disperses before or simultaneously, send whether carry out the indication that frequency layer is disperseed to UE;
Among the step B: according to whether carrying out the indication that frequency layer is disperseed, whether decision carries out frequency layer is disperseed UE earlier; If carry out, then determine to carry out the frequency layer decentralized algorithm that frequency layer is disperseed according to indication, from the frequency layer decentralized algorithm of storage, find out definite frequency layer decentralized algorithm, carry out frequency layer with this frequency layer decentralized algorithm and disperse; Otherwise do not carry out the frequency layer scatter operation according to indication.
Can and store multiple indication strategy in the network side setting, comprise in every kind of indication strategy: need the frequency layer decentralized algorithm that adopts under network condition and this network condition;
Before network side issues indication, judge the indication strategy that the current network situation is met, according to this strategy, indication UE adopts the frequency layer decentralized algorithm in this strategy to carry out the frequency layer dispersion.
Described network condition comprises quantity and the distribution situation, the distribution situation of sub-district, cell channel quality situation, congestion situation of following a kind of situation: UE in the sub-district, the frequency operating position of each sub-district, frequency planning situation at least.
In the steps A, network side indication UE adopts more than one frequency layer decentralized algorithm to carry out frequency layer when disperseing, step B is described determine to carry out the frequency layer decentralized algorithm that frequency layer disperses method can for:
Select a kind of frequency layer decentralized algorithm in more than one frequency layer decentralized algorithms from indication, be defined as carrying out the algorithm that frequency layer is disperseed.
Select in described more than one frequency layer decentralized algorithms from indication a kind of frequency layer decentralized algorithm method can for: select at random or select by the selective sequential that receives or by the selecting sequence that sets in advance.
When selecting a kind of frequency layer decentralized algorithm at random, can adopt the function algorithm that evenly to select to select at random.
The described function algorithm that can evenly select can be hash algorithm or random function algorithm.
In the steps A, when network side indication UE adopts more than one frequency layer decentralized algorithm to carry out the frequency layer dispersion, can further indicate described more than one the preferential selecting sequence of frequency layer decentralized algorithm or the conditioned disjunction selective rule from described more than one frequency layer decentralized algorithm, selected of UE or when UE takes on a different character of UE, a kind of frequency layer decentralized algorithm in described more than one the frequency layer decentralized algorithm that uses respectively;
The method that step B is described to determine to carry out the frequency layer decentralized algorithm that frequency layer disperses is:
The preferential selecting sequence of UE in as indicated selected a kind of frequency layer decentralized algorithm, is defined as carrying out the algorithm that frequency layer is disperseed; Or alternative condition as indicated or selective rule or UE with which kind of feature use any frequency layer decentralized algorithm of these several frequency layer decentralized algorithms respectively, selects a kind of frequency layer decentralized algorithm, is defined as carrying out the algorithm that frequency layer is disperseed.
Described indication is when UE takes on a different character, and the method for a kind of frequency layer decentralized algorithm in described more than one the frequency layer decentralized algorithm that uses respectively is: to the different frequency layer decentralized algorithm of UE indication of different districts;
Among the described step B, UE is according to indication, and the frequency layer decentralized algorithm of self sub-district, place correspondence wherein is defined as carrying out the frequency layer decentralized algorithm that frequency layer is disperseed.
In the described steps A, network side indication UE adopts more than one frequency layer decentralized algorithm to carry out frequency layer when disperseing, and further indicates described more than one the selecting sequence of frequency layer decentralized algorithm of UE;
Among the described step B, UE is defined as carrying out the algorithm that frequency layer is disperseed with described more than one frequency layer decentralized algorithm whole or part as indicated, and carries out repeatedly frequency layer according to the selecting sequence in the indication and disperse.
The method that described indication UE adopts more than one frequency layer decentralized algorithm to carry out the frequency layer dispersion is: adopt binary data to indicate various frequency layer decentralized algorithms;
Network side and UE use agreement default value pre-determine the frequency layer decentralized algorithm that different binary data is indicated respectively;
Or network side further sends binary data indication implication information to UE, and UE is known the frequency layer decentralized algorithm that different binary data are indicated according to this information.
Send whether to carry out the indication of frequency dispersion to user equipment (UE), and indication UE adopt more than one frequency layer decentralized algorithm carry out method that frequency layer disperses can for: in a control messages, indicate or indicate respectively by putting multiple spot control channel or broadcast channel by two control messages.
Described step B may further include, and UE carries out the probability verification respectively to one or more frequency layer decentralized algorithms in this indication after receiving indication;
The method that step B is described to determine to carry out the frequency layer decentralized algorithm that frequency layer disperses is: the frequency layer decentralized algorithm that will be defined as carrying out the frequency layer dispersion in will indicate by the frequency layer decentralized algorithm of probability verification;
If the frequency layer decentralized algorithm in the indication does not all pass through the probability verification with, then UE is according to s own situation or predetermined system of selection or select a kind of frequency layer decentralized algorithm at random.
The method of described probability verification can for: network side for every kind of frequency layer decentralized algorithm in the indication, send a verification probability factor to UE; After UE receives network side indication, produce a random number, it compared with the corresponding check probability factor that receives from network side respectively for every kind of frequency layer decentralized algorithm in the indication, if random number greater than described verification probability factor, then verification is passed through; Otherwise verification is not passed through.
Network side can according to preset priority or selecting sequence, send different verification probability factors to UE for different frequency layer decentralized algorithm in the indication.
Described frequency layer decentralized algorithm comprises following a kind of algorithm at least: pseudo-random function algorithm, hash function algorithm, with frequency dispersion to the algorithm, the cell reselection algorithm that carry out the frequency before the frequency layer convergence.
As seen from the above technical solutions, subscriber equipment carries out the method that frequency layer is disperseed in this multimedia broadcast/group broadcast service of the present invention, the multiple frequency layer decentralized algorithm of storage in UE, network side not only indicates UE to carry out the frequency layer dispersion, and indication UE adopts any or which kind frequency layer decentralized algorithm carries out the frequency layer dispersion; UE selects the frequency layer decentralized algorithm to carry out the frequency layer dispersion according to indication.Therefore, realized that UE selects and frequency of utilization layer decentralized algorithm flexibly, thereby adapted to different network condition.Simultaneously, because network side can be controlled the trend that UE selects at random, it is balanced more to make the whole network user distribute.
Description of drawings
Fig. 1 is for supporting the wireless network architecture schematic diagram of multicast/broadcast business;
Fig. 2 receives the entire flow of certain MBMS broadcasting service for the user;
Fig. 3 receives the entire flow of certain MBMS multicast service for the user;
Fig. 4 is a MCCH channel dispatch cycle schematic diagram;
Fig. 5 is the frequency layer dispersion process process chart of the present invention's first preferred embodiment;
Fig. 6 is the frequency layer dispersion process process chart of the present invention's second preferred embodiment;
Fig. 7 is the frequency layer dispersion process process chart of the present invention's the 3rd preferred embodiment;
Fig. 8 is the frequency layer dispersion process process chart of the present invention's the 4th preferred embodiment;
Fig. 9 is the frequency layer dispersion process process chart of the present invention's the 5th preferred embodiment.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Subscriber equipment carries out the method that frequency layer is disperseed in this multimedia broadcast/group broadcast service of the present invention, overall invention thought is: the frequency layer decentralized algorithm of storing two or more in UE, when network side carries out the frequency layer scatter operation at needs, send to adopt any or which is planted the frequency layer decentralized algorithm and carries out the indication that frequency layer is disperseed to UE; After UE receives indication, carry out frequency layer according to this indication and disperse.
In the practical application, network side can be in sending the multimedia broadcast/group broadcast service data procedures sends to UE and adopts any or which plants the frequency layer decentralized algorithm or/and whether carry out the indication that frequency layer is disperseed; Also can be when multimedia broadcast/group broadcast service conversation finishes sending to UE adopts any or which plants the frequency layer decentralized algorithm or/and whether carry out the indication of frequency dispersion; Can also be after the scheduled time that multimedia broadcast/group broadcast service conversation finishes sending to UE adopts any or which plants the frequency layer decentralized algorithm or/and whether carry out the indication of frequency dispersion.Generally speaking, be in the session receiving course, after UTRAN receives the conversation end notice that CN sends, converge operation according to whether carrying out overfrequency, send above-mentioned indication to UE.
Network side adopts any or which is planted the frequency layer decentralized algorithm and carries out frequency layer and disperse and can realize by indicating strategy to UE indication, concrete method is: in the network side setting and store multiple indication strategy, comprise in every kind of indication strategy: under which kind of network condition, the frequency layer decentralized algorithm is planted in corresponding use which kind of or which; Before network side issues indication, judge that the current network situation meets the network condition of which kind of indication strategy, according to this strategy, indication UE adopts the frequency layer decentralized algorithm in this strategy to carry out the frequency layer dispersion.
The present invention is described in detail below to lift five preferred embodiments.
First preferred embodiment:
In the present embodiment, UE stored pseudo-random function algorithm, hash function algorithm, with frequency dispersion to algorithm, these four kinds of frequency layer decentralized algorithms of cell reselection algorithm of carrying out the frequency before the frequency layer convergence.In the practical application, can be other various frequency layer decentralized algorithms.Stored multiple indication strategy among the UTRAN of network side.Such as: according to quantity and the network condition such as frequency use of the distribution situation of distribution situation, sub-district, channel quality condition, congestion situation, each sub-district, frequency planning situation of current UE in the sub-district, indication UE adopts the pseudo-random function algorithm in the above-mentioned algorithm, or adopt above-mentioned with frequency dispersion to the algorithm that carries out the frequency before the frequency layer convergence, or adopt the pseudo-random function algorithm to adopt hash function algorithm or the like more earlier.These indicate strategy, can are provided with and store according to different network condition by the developer, and can add when system maintenance or delete.
The frequency layer dispersion process of present embodiment is referring to Fig. 5, and Fig. 5 is the frequency layer dispersion process process chart of the present invention's first preferred embodiment.This flow process may further comprise the steps:
In the present embodiment, indication UE carries out frequency layer scatter operation and indication, and to adopt any or multiple frequency layer decentralized algorithm be respectively in two control messages before one, send to UE's after one, during practical application, also can in same control messages, send to UE simultaneously.The indication control information can send to multiple spot control channel (MCCH) or broadcast channel (BCH) by point.
Wherein can adopt binary data or other modes to indicate UE to adopt any or which is planted the frequency layer decentralized algorithm and carries out frequency layer and disperse.If employing binary data, UTRAN can further send binary data indication implication information to UE, UE knows according to this information which kind of frequency layer decentralized algorithm which binary data indicates, and this information can send separately, also can send in above-mentioned control messages; Certainly, UTRAN and UE can also stipulate which kind of frequency layer decentralized algorithm which binary data indicates by the use agreement default value, and this situation does not just need network side to send above-mentioned binary data indication implication information again.
In the present embodiment, the binary data of supposing the pseudo-random function algorithm is 01; The binary data of hash function algorithm is 10, can also represent not carry out the frequency layer scatter operation with 00.
If what UE received is not carry out the indication that frequency layer is disperseed, then UE does not carry out the probability verification according to the scatter operation of indication execution frequency layer yet.
After UE receives the above-mentioned indication of UTRAN, produce one 0～1 random number, itself and the verification probability factor that receives from network side compared, if random number greater than described verification probability factor, then verification is passed through; Otherwise verification is not passed through.
Carrying out the probability verification is the selectable process process, in the practical application, also can not carry out the probability verification.
Present embodiment is that the probability verification is carried out in indication, and during practical application, UE can also carry out the probability verification respectively to one or more frequency layer decentralized algorithms in this indication after receiving indication; Frequency layer decentralized algorithm by the probability verification in the indication is defined as carrying out the frequency layer decentralized algorithm that frequency layer is disperseed; If all not by the probability verification, then UE selects a kind of frequency layer decentralized algorithm according to s own situation or predetermined system of selection to the frequency layer decentralized algorithm in the indication.
Wherein, the method for probability verification can for: network side for every kind of frequency layer decentralized algorithm in the indication, send a verification probability factor to UE; After UE receives network side indication, produce a random number, it compared with the corresponding check probability factor that receives from network side respectively for every kind of frequency layer decentralized algorithm in the indication, if random number greater than described verification probability factor, then verification is passed through; Otherwise verification is not passed through.Network side according to preset priority or selecting sequence, sends different verification probability factor to UE for different frequency layer decentralized algorithm in the indication.
UE can determine according to the situations such as MBMS business that the intensity of adjacent cell frequency signal, adjacent sub-district provide.Cell frequency signal before converging such as: current frequency is the strongest, then adopt frequency dispersion to the algorithm that carries out the frequency before the frequency layer convergence, with frequency dispersion to primary frequency; If the MBMS business that adjacent sub-district does not provide UE to need, then UE is not distributed on the frequency of this neighbour sub-district.
Second preferred embodiment:
Present embodiment UE is identical with preferred embodiment one with UTRAN, has all stored related content, no longer repeats here.
The frequency layer dispersion process of present embodiment is referring to Fig. 6, and Fig. 6 is the frequency layer dispersion process process chart of the present invention's second preferred embodiment.This flow process may further comprise the steps:
Can be in this step by selecting at random or selecting the frequency layer decentralized algorithm by the selective sequential that receives or by the selecting sequence that sets in advance.For example: the algorithm that adopts hash algorithm or random function algorithm etc. evenly to select is selected the frequency layer decentralized algorithm.
The 3rd preferred embodiment:
Present embodiment UE is identical with preferred embodiment one with UTRAN, has all stored related content, no longer repeats here.
The frequency layer dispersion process of present embodiment is referring to Fig. 7, and Fig. 7 is the frequency layer dispersion process process chart of the present invention's the 3rd preferred embodiment.This flow process may further comprise the steps:
Such as: UTRAN notice UE preferentially selects the hash function algorithm in the present embodiment; If or notice UE current UE frequency to converge the frequency signal of preceding sub-district strong, then select frequency dispersion if the frequency signal of current continuous sub-district is all stronger, then to select pseudo-random function algorithm or the like to the algorithm that carries out the frequency before the frequency layer convergence.
The 4th preferred embodiment:
Present embodiment UE is identical with preferred embodiment one with UTRAN, has all stored related content, no longer repeats here.
The frequency layer dispersion process of present embodiment is referring to Fig. 8, and Fig. 8 is the frequency layer dispersion process process chart of the present invention's the 4th preferred embodiment.This flow process may further comprise the steps:
The 5th preferred embodiment:
Present embodiment UE is identical with preferred embodiment one with UTRAN, has all stored related content, no longer repeats here.
The frequency layer dispersion process of present embodiment is referring to Fig. 9, and Fig. 9 is the frequency layer dispersion process process chart of the present invention's the 4th preferred embodiment.This flow process may further comprise the steps:
In the present embodiment, network side is that different frequency layer decentralized algorithms has been indicated in different sub-districts, in the practical application, and can also be for the different frequency layer decentralized algorithm of UE indication with different characteristic.For example: for the different frequency layer decentralized algorithm of UE indication of different conditions.
By the above embodiments as seen, subscriber equipment carries out the method that frequency layer is disperseed in this multimedia broadcast/group broadcast service of the present invention, has realized that UE selects and frequency of utilization layer decentralized algorithm flexibly, thereby has adapted to different network condition.Simultaneously, because network side can be controlled the trend that UE selects at random, it is balanced more to make the whole network user distribute.
Claims (18)
1. subscriber equipment carries out the method that frequency layer is disperseed in the multimedia broadcast/group broadcast service, it is characterized in that, and the two or more frequency layer decentralized algorithm of storage in user equipment (UE), the frequency layer dispersion process may further comprise the steps:
When A, network side carried out the frequency layer scatter operation at needs, the algorithm of more than one in the described frequency layer decentralized algorithm of UE transmission employing carried out the indication that frequency layer is disperseed;
After B, UE receive this indication,, determine to carry out the frequency layer decentralized algorithm that frequency layer is disperseed, from the frequency layer decentralized algorithm of storage, find out definite frequency layer decentralized algorithm, carry out frequency layer with this frequency layer decentralized algorithm and disperse according to this indication.
2. the method for claim 1 is characterized in that: the time that described needs carry out the frequency layer scatter operation be: network side is sending in the multimedia broadcast/group broadcast service data procedures; Or when the multimedia broadcast/group broadcast service conversation terminal procedure; Or after the scheduled time that multimedia broadcast/group broadcast service conversation finishes.
3. the method for claim 1, it is characterized in that: in the described steps A, network side send to adopt to UE more than one algorithm in the described frequency layer decentralized algorithm carry out indication that frequency layer disperses before or simultaneously, send whether carry out the indication that frequency layer is disperseed to UE;
Among the step B: according to whether carrying out the indication that frequency layer is disperseed, whether decision carries out frequency layer is disperseed UE earlier; If carry out, then determine to carry out the frequency layer decentralized algorithm that frequency layer is disperseed according to indication, from the frequency layer decentralized algorithm of storage, find out definite frequency layer decentralized algorithm, carry out frequency layer with this frequency layer decentralized algorithm and disperse; Otherwise do not carry out the frequency layer scatter operation according to indication.
4. the method for claim 1 is characterized in that: in the network side setting and store multiple indication strategy, comprise in every kind of indication strategy: need the frequency layer decentralized algorithm that adopts under network condition and this network condition;
Before network side issues indication, judge the indication strategy that the current network situation is met, according to this strategy, indication UE adopts the frequency layer decentralized algorithm in this strategy to carry out the frequency layer dispersion.
5. method as claimed in claim 4, it is characterized in that, described network condition comprises quantity and the distribution situation, the distribution situation of sub-district, cell channel quality situation, congestion situation of following a kind of situation: UE in the sub-district, the frequency operating position of each sub-district, frequency planning situation at least.
6. the method for claim 1 is characterized in that: in the steps A, network side indication UE adopts more than one frequency layer decentralized algorithm to carry out frequency layer when disperseing, and the method that step B is described to determine to carry out the frequency layer decentralized algorithm that frequency layer disperses is:
Select a kind of frequency layer decentralized algorithm in more than one frequency layer decentralized algorithms from indication, be defined as carrying out the algorithm that frequency layer is disperseed.
7. method as claimed in claim 6 is characterized in that: select a kind of method of frequency layer decentralized algorithm to be in described more than one frequency layer decentralized algorithms from indication: select at random or select by the selective sequential that receives or by the selecting sequence that sets in advance.
8. method as claimed in claim 7 is characterized in that: when selecting a kind of frequency layer decentralized algorithm at random, the function algorithm that employing can evenly be selected is selected at random.
9. method as claimed in claim 8 is characterized in that: the described function algorithm that can evenly select is hash algorithm or random function algorithm.
10. the method for claim 1, it is characterized in that: in the steps A, when network side indication UE adopts more than one frequency layer decentralized algorithm to carry out the frequency layer dispersion, further described more than one the preferential selecting sequence of frequency layer decentralized algorithm or the conditioned disjunction selective rule from described more than one frequency layer decentralized algorithm, selected of UE or when UE takes on a different character of indication UE, a kind of frequency layer decentralized algorithm in described more than one the frequency layer decentralized algorithm of use respectively;
The method that step B is described to determine to carry out the frequency layer decentralized algorithm that frequency layer disperses is:
The preferential selecting sequence of UE in as indicated selected a kind of frequency layer decentralized algorithm, is defined as carrying out the algorithm that frequency layer is disperseed; Or the alternative condition as indicated or selective rule or judge use which kind of frequency layer decentralized algorithm according to self-condition, select a kind of frequency layer decentralized algorithm, be defined as carrying out the algorithm that frequency layer is disperseed.
11. method as claimed in claim 10, it is characterized in that: described indication is when UE takes on a different character, and the method for a kind of frequency layer decentralized algorithm in described more than one the frequency layer decentralized algorithm that uses respectively is: to the different frequency layer decentralized algorithm of UE indication of different districts;
Among the described step B, UE is according to indication, and the frequency layer decentralized algorithm of self sub-district, place correspondence wherein is defined as carrying out the frequency layer decentralized algorithm that frequency layer is disperseed.
12. the method for claim 1 is characterized in that: in the steps A, network side indication UE adopts more than one frequency layer decentralized algorithm to carry out frequency layer when disperseing, and further indicates described more than one the selecting sequence of frequency layer decentralized algorithm of UE;
Among the described step B, UE is defined as carrying out the algorithm that frequency layer is disperseed with described more than one frequency layer decentralized algorithm whole or part as indicated, and carries out repeatedly frequency layer according to the selecting sequence in the indication and disperse.
13. as claim 1,3,6,10,11 or 12 described methods, it is characterized in that: the method that indication UE adopts more than one frequency layer decentralized algorithm to carry out the frequency layer dispersion is: adopt binary data to indicate various frequency layer decentralized algorithms;
Network side and UE use agreement default value pre-determine the frequency layer decentralized algorithm that different binary data is indicated respectively;
Or network side further sends binary data indication implication information to UE, and UE is known the frequency layer decentralized algorithm that different binary data are indicated according to this information.
14. method as claimed in claim 3, it is characterized in that: send whether carry out the indication of frequency dispersion to user equipment (UE), and the method that indication UE adopts more than one frequency layer decentralized algorithm to carry out the frequency layer dispersion is: in a control messages, indicate or indicate respectively by two control messages by putting multiple spot control channel or broadcast channel.
15. the method for claim 1 is characterized in that: described step B comprises that further UE carries out the probability verification respectively to one or more frequency layer decentralized algorithms in this indication after receiving indication;
The method that step B is described to determine to carry out the frequency layer decentralized algorithm that frequency layer disperses is: the frequency layer decentralized algorithm that will be defined as carrying out the frequency layer dispersion in will indicate by the frequency layer decentralized algorithm of probability verification;
If the frequency layer decentralized algorithm in the indication does not all pass through the probability verification with, then UE is according to s own situation or predetermined system of selection or select a kind of frequency layer decentralized algorithm at random.
16. method as claimed in claim 15 is characterized in that, the method for described probability verification is: network side sends a verification probability factor for every kind of frequency layer decentralized algorithm in the indication to UE; After UE receives network side indication, produce a random number, it compared with the corresponding check probability factor that receives from network side respectively for every kind of frequency layer decentralized algorithm in the indication, if random number greater than described verification probability factor, then verification is passed through; Otherwise verification is not passed through.
17. method as claimed in claim 16 is characterized in that: network side according to preset priority or selecting sequence, sends different verification probability factor to UE for different frequency layer decentralized algorithm in the indication.
18. as claim 1,3,4,6,7,8,10,11,12,14,15,16 or 17 described methods, it is characterized in that described frequency layer decentralized algorithm comprises following a kind of algorithm at least: pseudo-random function algorithm, hash function algorithm, with frequency dispersion to the algorithm, the cell reselection algorithm that carry out the frequency before the frequency layer convergence.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100515738A CN100389615C (en) | 2005-03-07 | 2005-03-07 | Method for decentralizing frequency level of user equipment in multimedia broadcasting/group broadcasting service |
| PCT/CN2006/000340 WO2006094455A1 (en) | 2005-03-07 | 2006-03-07 | Method for frequency layer dispersal of ue in the multimedia broadcast/multicast service |
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| CNB2005100515738A CN100389615C (en) | 2005-03-07 | 2005-03-07 | Method for decentralizing frequency level of user equipment in multimedia broadcasting/group broadcasting service |
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| CN1832589A CN1832589A (en) | 2006-09-13 |
| CN100389615C true CN100389615C (en) | 2008-05-21 |
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| CNB2005100515738A Expired - Fee Related CN100389615C (en) | 2005-03-07 | 2005-03-07 | Method for decentralizing frequency level of user equipment in multimedia broadcasting/group broadcasting service |
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| WO (1) | WO2006094455A1 (en) |
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| CN101296400B (en) * | 2007-04-29 | 2012-05-23 | 中兴通讯股份有限公司 | Method and device for selecting optimized frequency layer of multimedia broadcast/multicast service |
| CN101299831B (en) * | 2007-04-30 | 2011-06-22 | 中兴通讯股份有限公司 | Method and apparatus for selecting MBMS preferable frequency layer |
| CN106060832A (en) * | 2016-06-17 | 2016-10-26 | 华南理工大学 | Partial frequency reuse-based spectrum flexible allocation method in long term evolution (LTE) heterogeneous network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004100587A1 (en) * | 2003-05-12 | 2004-11-18 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for transmitting importance layers for scalable data services |
| US20050030966A1 (en) * | 2003-08-06 | 2005-02-10 | Zhijun Cai | Method and apparatus for providing session data to a subscriber to a multimedia broadcast multicast service |
| WO2005020474A1 (en) * | 2003-08-22 | 2005-03-03 | Samsung Electronics Co., Ltd. | Cell reselection method for receiving packet data in a mobile communication system supporting mbms |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1571531A (en) * | 2003-07-15 | 2005-01-26 | 北京三星通信技术研究有限公司 | Method of reliable transmission of public control information in multimedia broadcasting and multicast service |
| KR100943901B1 (en) * | 2003-08-19 | 2010-02-24 | 엘지전자 주식회사 | Method of Sharing Radio Protocol Entity for Broadcasting and Multicast |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004100587A1 (en) * | 2003-05-12 | 2004-11-18 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for transmitting importance layers for scalable data services |
| US20050030966A1 (en) * | 2003-08-06 | 2005-02-10 | Zhijun Cai | Method and apparatus for providing session data to a subscriber to a multimedia broadcast multicast service |
| WO2005020474A1 (en) * | 2003-08-22 | 2005-03-03 | Samsung Electronics Co., Ltd. | Cell reselection method for receiving packet data in a mobile communication system supporting mbms |
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| CN1832589A (en) | 2006-09-13 |
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