CN102469585A - Method and system for carrying out paging on MTC group - Google Patents
Method and system for carrying out paging on MTC group Download PDFInfo
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- CN102469585A CN102469585A CN2010105370632A CN201010537063A CN102469585A CN 102469585 A CN102469585 A CN 102469585A CN 2010105370632 A CN2010105370632 A CN 2010105370632A CN 201010537063 A CN201010537063 A CN 201010537063A CN 102469585 A CN102469585 A CN 102469585A
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Abstract
The invention discloses a method for carrying out paging on a machine type communication (MTC) group. When a network element of a core network (CN) carries out paging on an MTC group, a paging message is sent to a network element of a radio access network (RAN), wherein the paging message at least carries a flag of an MTC group that needs to be paged; and after the RAN network element receives the paging message, the RAN network element calculates a paging time according to a parameter carried in the paging message and sends the paging message at the calculated paging time, wherein the paging message that is sent to MTC equipment by the RAN network element at least carries a terminal flag or an MTC group flag, wherein the terminal or the MTC group needs to be paged. Correspondedly, the invention also discloses a system for carrying out paging on an MTC group. According to the invention, when it is necessary to trigger a set of a large number of MTC devices to make communication with an MTC server, there is no need to individually carry out paging on the MTC devices one by one, so that the signaling number can be reduced and radio resources can be saved.
Description
Technical field
The present invention relates to Machine Type communication (MTC, Machine Type Communication) field, relate in particular to a kind of method and system that the MTC group is carried out paging.
Background technology
Cellular radio communication system mainly by core net (Core Network, CN), (Radio AccessNetwork RAN) forms with the terminal Access Network.As shown in Figure 1, wherein, core net is responsible for the Non-Access Stratum affairs, updating of terminal position etc. for example, and be the anchor point of user plane; Access Network comprises the base station; Perhaps base station and base stations control; Access Network is responsible for Access Layer affairs (the for example management of Radio Resource); Can have physics or connection in logic according to actual conditions between the base station, like the connection between the base station among Fig. 11 and base station 2 or the base station 3, and each base station can be connected with one or more than one core net node.The terminal be subscriber equipment (User Equipment, UE), be meant can with the various device of cellular radio communication network communication, such as mobile phone or notebook computer etc.
The MTC business is the business that machine communicates between the machine; In the MTC business, do not need people's participation; All communications are independently accomplished by machine, and MTC is professional to obtain data through awareness apparatus such as transducers, through communication module data is reported mobile communications network then; And be linked into public data network through mobile communications network, for example in application such as logistics monitoring, safety monitoring, tele-medicine detection, remote meter readings.These data are managed by the particular server of mobile operator or special MTC operator, can supply MTC user or MTC manager to check, in this process, the equipment that obtains professional needed data is MTC equipment.
But; In the prior art; Trigger the huge MTC equipment of one group of quantity and MTC server at needs and set up (for example, the terminal equipment of notice remote meter reading sends and recorded server this month) when communicate by letter, generally can be independent one by one carry out paging; Thereby can increase the signaling quantity of beep-page message greatly, thereby Radio Resource is caused bigger consumption.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and system that the MTC group is carried out paging, when the MTC group is carried out paging, can reduce signaling quantity, save radio resources.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method that the MTC group is carried out paging comprises:
When core network element carries out paging to the MTC group, send beep-page message and give the wireless access network element, said beep-page message carries at least needs the MTC of paging group id;
After the wireless access network element receives said beep-page message; According to the calculation of parameter calling time in the said beep-page message; And sending beep-page message to MTC equipment at said calling time, said wireless access network element carries terminal iidentification or the MTC group id that needs paging at least to the beep-page message that MTC equipment sends.
The beep-page message that said core network element sends to the wireless access network element also carries with the next item down or multinomial: the discontinuous receiving cycle of index information, core network information, tracking area information, beep-page message.
The value of said index information is the MTC group id, or the value that calculates according to the MTC group id.
This method also comprises: MTC equipment receives the beep-page message that said wireless access network element sends at the calling time that himself calculates.
Said wireless access network element also carries core network information to the beep-page message that MTC equipment sends.
Said MTC group id carries through values of parameters in the modification beep-page message, perhaps, carries through the parameter that is provided with.
A kind of system that the MTC group is carried out paging comprises: core network element and wireless access network element; Wherein,
Said core network element is used for when the MTC group is carried out paging, sending beep-page message and giving the wireless access network element, and said beep-page message carries at least needs the MTC of paging group id;
Said wireless access network element; Be used for after receiving said beep-page message from core network element; According to the calculation of parameter calling time in the beep-page message of said reception; And sending beep-page message to MTC equipment at said calling time, said wireless access network element carries terminal iidentification or the MTC group id that needs paging at least to the beep-page message that MTC equipment sends.
The beep-page message that said core network element sends to the wireless access network element also carries with the next item down or multinomial: the discontinuous receiving cycle of index information, core network information, tracking area information, beep-page message.
The value of said index information is the MTC group id, or the value that calculates according to the MTC group id.
This system also comprises MTC equipment, is used for receiving the beep-page message that said wireless access network element sends at the calling time that himself calculates.
Said wireless access network element also carries core network information to the beep-page message that MTC equipment sends.
Said MTC group id carries through values of parameters in the modification beep-page message, perhaps, carries through the parameter that is provided with.
The method and system that the present invention carries out paging to the MTC group, in the time of need carrying out paging to the MTC group, core network element sends beep-page message and gives the wireless access network element, and said beep-page message carries at least needs the MTC of paging group id; After the wireless access network element receives said beep-page message; According to the calculation of parameter calling time in the beep-page message of said reception; And sending beep-page message to MTC equipment at the calling time of said calculating, said wireless access network element carries terminal iidentification or the MTC group id that needs paging at least to the beep-page message that MTC equipment sends.Through the present invention, trigger the huge MTC equipment of one group of quantity and MTC server at needs and set up when communicate by letter, do not need independent one by one carry out paging, thereby can reduce signaling quantity, save radio resources.
Description of drawings
Fig. 1 is the sketch map of an existing cellular radio communication system;
The method flow sketch map that Fig. 2 carries out paging for the present invention to the MTC group;
The method flow sketch map that Fig. 3 carries out paging for the embodiment of the invention to the MTC group.
Embodiment
When the present invention carried out paging at needs to the MTC group, core network element sent beep-page message and gives the wireless access network element, and said beep-page message carries at least needs the MTC of paging group id; After the wireless access network element receives said beep-page message; According to the calculation of parameter calling time in the beep-page message of said reception; And sending beep-page message to MTC equipment at the calling time of said calculating, said wireless access network element carries terminal iidentification or the MTC group id that needs paging at least to the beep-page message that MTC equipment sends.
To the problem of mentioning in the prior art; The MTC service needed is introduced some and traditional mobile communication different characteristic; For example organize management characteristic, when this characteristic was activated, same user's MTC equipment possibly be divided into a group; Network can be unified configuration parameter to whole group, and these parameters are applied to belong to all MTC equipment of this group.Here, MTC equipment is a kind of subscriber equipment, i.e. terminal.Operator is provided with in the CAMEL-Subscription-Information of this MTC equipment and activation group management characteristic, is stored among the user attaching server HSS.HSS is an entity of being responsible for identity information, authentication information and the authorization message etc. of preservation user or terminal equipment in the communication network.According to different situations, HSS can be used for preserving user's the identity information and the binding information of user and terminal equipment, or only preserves user's identity information (can be preserved the binding information of user and terminal equipment by gateway), or directly preserves the identity information of terminal equipment.HSS also is responsible for user's subscribed database, and execution user's authentication and mandate etc.Business platform can be from HSS inquiring user or end message.
After introducing MTC equipment, the MTC server can be managed MTC equipment through communication network, and considers the characteristic that MTC is professional; Such as one group of watch-dog in parking lot, the long-range water meter of all of a sub-district (ammeter, gas meter) equipment etc.; All be to belong to a user, and possess identical character that network can belong to a user with these so; MTC equipment with identical characteristics is divided into a group, and these MTC equipment are organized management.
The method flow sketch map that Fig. 2 carries out paging for the present invention to the MTC group, as shown in Figure 2, this method comprises:
Step 201: when core network element (like mobility management unit MME) carries out paging to the MTC group, send beep-page message and give wireless access network element (like the base station).
The beep-page message that said core network element sends to the wireless access network element carries at least and needs the MTC of paging group id; Said MTC group id can carry through revising in the existing beep-page message values of parameters; For example; The UE Paging Identity parameter of existing message can be set to " IMSI " or " S-TMSI ", in order to carry the MTC group id, UE Paging Identity parameter range can be set be " IMSI " or " S-TMSI " or " MTC_Group_ID "; UE Paging Identity parameter is set to MTC_Group_ID " time, i.e. portability MTC group id; Said MTC group id also can carry through the special parameter (like Group Paging Identity) that is provided with.
Carry the content except that above-mentioned; The beep-page message that core network element sends to the wireless access network element can also carry with the next item down or multinomial: the discontinuous receiving cycle (Paging DRX) (being generally a series of values) of index information, core network information (CN Domain), tracking area information, beep-page message etc.; Said index information generally calculates according to MTC group id (MTC_Group_ID); Like index information is MTC_Group_ID mod 1024, and said index information also can be MTC_Group_ID.。
Step 202: after the wireless access network element receives said beep-page message, according to the calculation of parameter calling time in the beep-page message of said reception.
Here, the wireless access network element calculate calling time specifically can for:
At first, calculate the frame that sends beep-page message, be called paging frame here.
The System Frame Number of this paging frame (SFN) account form is following:
SFN?mod?T＝(T?div?N)×(UE_ID?mod?N)
Secondly, calculate the calling time (PO) on the paging frame, i.e. subframe numbers.
I_s (the representing a kind of parameter) account form of pointing to subframe numbers is following:
i_s＝floor(UE_ID/N)mod?Ns
Obtain to send the subframe of beep-page message according to following table:
| Ns | PO?when?i_s＝0 | PO?wheni_s＝1 | PO?wheni_s＝2 | PO?wheni_s＝3 |
| 1 | 9 | N/A | N/A | N/A |
| 2 | 4 | 9 | N/A | N/A |
| 4 | 0 | 4 | 5 | 9 |
Need to prove, in the aforementioned calculation process:
T is a discontinuous receiving cycle;
The value of nB is 4T, 2T, T, T/2, T/4, T/8, T/16, T/32;
The value of N be min (T, nB);
The value of Ns be max (1, nB/T);
UE_ID is the value of index information, like MTC group id or the value of IMSI or MTC group id mod 1024 or the value of IMSI mod 1024;
N/A representes uncertain;
Mod: the arithmetic formula, it is remainder that the value of being divided by is counted in expression two;
Div: the arithmetic formula, it is integer that the value of being divided by is counted in expression two;
Floor: the arithmetic formula, the expression value is that bracket mileage value rounds downwards.
Step 203: the wireless access network element sends beep-page message at the calling time of its calculating to MTC equipment.
Said wireless access network element carries terminal iidentification or the MTC group id that needs paging at least to the beep-page message that MTC equipment sends.In addition, can also carry core network information (CN Domain) etc.Here, the mode of carrying of MTC group id is identical with the mode of carrying in the step 201.
Step 204: need the MTC equipment in the MTC group of paging to receive the beep-page message that said wireless access network element sends at the calling time that himself calculates.
Need to prove that it is two independently processes that MTC calculation of equipments calling time and wireless access network element calculate calling time, the method for MTC calculation of equipments calling time is identical with the wireless access network element; Need to prove; The discontinuous receiving cycle of the beep-page message that the wireless access network element is selected generally can pass through system broadcasts by the MTC device learns, in addition, and when MTC equipment calculates calling time in this locality; If the MTC group id is preserved in this locality; Then the terminal can use the MTC group id as " UE_ID " in the algorithm, otherwise, can use IMSI as " UE_ID " in the algorithm.
The present invention also proposes a kind of system that the MTC group is carried out paging, comprising: core network element and wireless access network element; Wherein,
Said core network element is used for when needs carry out paging to the MTC group, sending beep-page message and giving the wireless access network element, and said beep-page message carries at least needs the MTC of paging group id;
Said wireless access network element; Be used for after receiving said beep-page message from core network element; According to the calculation of parameter calling time in the beep-page message of said reception; And sending beep-page message to MTC equipment at said calling time, said wireless access network element carries terminal iidentification or the MTC group id that needs paging at least to the beep-page message that MTC equipment sends.
The beep-page message that said core network element sends to the wireless access network element also carries with the next item down or multinomial: the discontinuous receiving cycle of index information, core network information, tracking area information, beep-page message.
The value of said index information is the MTC group id, or the value that calculates according to the MTC group id.
This system also comprises MTC equipment, is used for receiving the beep-page message that said wireless access network element sends at the calling time that himself calculates.
Said wireless access network element also carries core network information to the beep-page message that MTC equipment sends.
Said MTC group id carries through values of parameters in the modification beep-page message, perhaps, carries through the parameter that is provided with.
Below in conjunction with specific embodiment the enforcement of technical scheme is done further to describe in detail.
The method flow sketch map that Fig. 3 carries out paging for the embodiment of the invention to the MTC group, as shown in Figure 3, this method comprises:
Step 301:MTC user is signed up as the group management mode when one's own MTC equipment is signed in to communication network management.
Step 302:MTC equipment sends attach request and gives MME when initial access network.
Step 303:MME to HSS (home subscriber server) request subscription data, comprises the affiliated group information of MTC equipment in the subscription data after receiving the attach request signaling.
Step 304:MME sends to adhere to and accepts signaling and give MTC equipment, and accepts to comprise in the signaling MTC group id adhering to.
Step 305: when MTC server or MTC user need check the data that MTC equipment gathers; Interface through between MTC server and the MME sends a request message, and one group of MTC equipment that this MTC user of request MME triggering has sends image data to the MTC server.
Step 306:MME sends beep-page message to the base station.
The content of beep-page message described in this step can be shown in table 1 or table 2:
Table 1
Table 2
Wherein, MTC_Group_ID representes the MTC group id.
Step 307: after the beep-page message of MME transmission is received in the base station, calculate calling time, and send beep-page message at calling time.
Comprise paged terminal iidentification of needs or MTC group id in the beep-page message described in this step.
The following algorithm computation calling time of base station basis:
At first calculate the frame that sends beep-page message, be called paging frame here, the System Frame Number of this frame (SFN) account form is following:
SFN?mod?T＝(T?div?N)*(UE_ID?mod?N)
Next calculates the calling time (PO) on the paging frame, i.e. subframe numbers, and it is following to point to the i_s account form of subframe numbers:
i_s＝floor(UE_ID/N)mod?Ns
Concrete subframe of sending beep-page message obtains according to following table:
| Ns | PO?when?i_s＝0 | PO?when?i_s＝1 | PO?when?i_s＝2 | PO?when?i_s＝3 |
| 1 | 9 | N/A | N/A | N/A |
| 2 | 4 | 9 | N/A | N/A |
| 4 | 0 | 4 | 5 | 9 |
In the present embodiment:
T: be the value of parameter in the step 306 " Paging DRX ";
nB：4T，2T，T，T/2，T/4，T/8，T/16，T/32；
N：min(T，nB)；
Ns：max(1，nB/T)；
UE_ID：MTC_Group_ID?mod?1024
Or?MTC_Group_ID
Step 308: the terminal is equally according to moment of the algorithm computation reading gating message in the step 307, and in calling time paging receiving message.When calling time is calculated in this locality in the terminal,, then use the MTC group id as " UE_ID " in the algorithm if the MTC group id is preserved in this locality, otherwise, use IMSI as " UE_ID " in the algorithm.
Step 309:, then carry out random access procedure if the identification information that comprises in the beep-page message that the sign at terminal or MTC group id can send with the base station is complementary.In random access procedure, use network allocation to give the random access sequence of MTC device-specific.For example; When supplying the terminal to insert at random, 100 random sequences that the always total call number in base station is 0-99 use; Wherein 0-19 distributes to the random access sequence that MTC is provided with use, and MTC equipment can only use this 20 random access sequences when execution inserts at random so; Ordinary terminal is carried out when inserting at random, can use all random access sequences of 0-99.When the purpose of so distributing is to introduce MTC equipment, guarantee the resource that the Human To Human is professional as much as possible.
Step 310: the data that terminal to report is gathered.
The above is merely embodiments of the invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (12)
1. method that Machine Type communication (MTC) group is carried out paging is characterized in that this method comprises:
When core network element carries out paging to the MTC group, send beep-page message and give the wireless access network element, said beep-page message carries at least needs the MTC of paging group id;
After the wireless access network element receives said beep-page message; According to the calculation of parameter calling time in the said beep-page message; And sending beep-page message to MTC equipment at said calling time, said wireless access network element carries terminal iidentification or the MTC group id that needs paging at least to the beep-page message that MTC equipment sends.
2. method according to claim 1; It is characterized in that the beep-page message that said core network element sends to the wireless access network element also carries with the next item down or multinomial: the discontinuous receiving cycle of index information, core network information, tracking area information, beep-page message.
3. method according to claim 2 is characterized in that, the value of said index information is the MTC group id, or the value that calculates according to the MTC group id.
4. method according to claim 1 is characterized in that, this method also comprises: MTC equipment receives the beep-page message that said wireless access network element sends at the calling time that himself calculates.
5. method according to claim 1 is characterized in that, said wireless access network element also carries core network information to the beep-page message that MTC equipment sends.
6. according to each described method of claim 1 to 5, it is characterized in that said MTC group id carries through values of parameters in the modification beep-page message, perhaps, carries through the parameter that is provided with.
7. the system that the MTC group is carried out paging is characterized in that this system comprises: core network element and wireless access network element; Wherein,
Said core network element is used for when the MTC group is carried out paging, sending beep-page message and giving the wireless access network element, and said beep-page message carries at least needs the MTC of paging group id;
Said wireless access network element; Be used for after receiving said beep-page message from core network element; According to the calculation of parameter calling time in the beep-page message of said reception; And sending beep-page message to MTC equipment at said calling time, said wireless access network element carries terminal iidentification or the MTC group id that needs paging at least to the beep-page message that MTC equipment sends.
8. system according to claim 7; It is characterized in that the beep-page message that said core network element sends to the wireless access network element also carries with the next item down or multinomial: the discontinuous receiving cycle of index information, core network information, tracking area information, beep-page message.
9. system according to claim 8 is characterized in that, the value of said index information is the MTC group id, or the value that calculates according to the MTC group id.
10. system according to claim 7 is characterized in that this system also comprises MTC equipment, is used for receiving the beep-page message that said wireless access network element sends at the calling time that himself calculates.
11. system according to claim 7 is characterized in that, said wireless access network element also carries core network information to the beep-page message that MTC equipment sends.
12., it is characterized in that said MTC group id carries through values of parameters in the modification beep-page message, perhaps, carries through the parameter that is provided with according to each described system of claim 7 to 11.
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