CN102932746B

CN102932746B - Relay

Info

Publication number: CN102932746B
Application number: CN201210397329.7A
Authority: CN
Inventors: 小岛祐治
Original assignee: Fujitsu Ltd
Current assignee: Fujitsu Ltd
Priority date: 2007-07-18
Filing date: 2007-07-18
Publication date: 2016-01-27
Anticipated expiration: 2027-07-18
Also published as: CN102932746A

Abstract

The present invention relates to relay, provide multicast type information transfer service by 1 in multiple channel to mobile device, possess: the 1st paging information determining means, for the channel of information transfer service, predetermine the 1st paging information; Data dissemination frame determining means, decides the frame of the data for distributing information transfer service based on the 1st paging information predetermined for each channel; And the 2nd paging information determining means, for the mobile device of at least 1 that have selected in multiple channel, decide the 2nd paging information based on the 1st paging information.By the channel of each information transfer service selected by mobile device to determine paging information, the data of multicast type information transfer service can be sent in frame synchronization thus with call notification monitored object, and can lengthen between stand-down further, the consumed power of mobile device can be reduced further.

Description

Relay

The divisional application that the national applications number of international application after on January 15th, 2010 enters National Phase in China that the application is international filing date is on 07 27th, 2007, international application no is PCT/JP2007/064175 is 200780053802.7, denomination of invention is " base station, device and mobile device " this parent application.

Technical field

The present invention relates to the base station sending multicast packet to mobile device, the device of the frame received off and on to mobile device notification and mobile device.

Background technology

In recent years, be called that the communication of WiMAX (WorldwideInteroperabilityforMicrowaveAccess) carries out standardization effort by IEEE (InstituteofElectricalandElectronicEngineers: U.S. electric institute of electronics).The IEEE802.16d (completing standardization) of the specification that the subscriber station (SubscriberStation) having not movement in WiMAX is object and with the IEEE802.16e (just in standardization) of the subscriber station of movement (MobileStation:MS) specification that is object.

Relay or the relay system of the multicast type information transfer service such as providing Multi-BSMBS (MulticastandBroadcastService: multicast type/broadcast-type information transfer service) such that what this specification was said is, wherein, this Multi-BSMBS is supported with the MS of the latter specification that is object and IEEE802.16e (just in standardization).

This device or system send multicast type data with the frame determined from base station off and on, and the MS thus receiving these data makes reception stop in the image duration not sending data, thus can reduce consumed power.

On the other hand, about session services, because the MS in standby period needs to monitor the calling from core network, and the frame (call notification monitored object frame) becoming the monitored object of call notification is also determined off and on, so reception can be made to stop in image duration beyond call notification monitored object frame and reduce consumed power.

In the past, in order to adjust the response time of MS to calling, being used for determining the paging informations such as the paging cycle of this call notification monitored object frame, determining by each MS.

In addition, in IEEE802.16e, the MS in standby mode also can receiving multicast data, but, and its concrete control method undefined.

Patent documentation 1: Japanese Unexamined Patent Publication 2004-221760 publication

Patent documentation 2: Japanese Unexamined Patent Publication 2004-159334 publication

Patent documentation 3: Japanese Unexamined Patent Publication 2004-135293 publication

Summary of the invention

The object of the invention is in relay as described above, suitably determine paging information and multicast distribution frame, thus reduce the consumed power of MS further.

According to the present invention, a kind of base station is provided, above-mentioned base station utilizes any one reception in frame group to carry out call notification to mobile device, above-mentioned reception frame group is that this mobile device carries out the intermittent reception frame group received, the feature of above-mentioned base station is, possesses sending part, this sending part utilizes any one in above-mentioned reception frame group to the Multicast Association data needed for the reception sending multicast packet, thus in this mobile device, carry out the reception of these Multicast Association data by the reception of above-mentioned reception frame group.

According to the present invention, a kind of device is also provided, carry out the appointment receiving frame group, this reception frame group is that mobile device carries out the intermittent reception frame group received, the feature of said apparatus is to possess control part, when by base station utilize regulation frame group in any one send multicast packet reception needed for Multicast Association data, this control part notifies this mobile device, allows this mobile device receive identical with the frame group of this regulation off and on or to comprise the frame group of frame group of this regulation.

According to the present invention, also provide a kind of can the mobile device of receiving multicast data, it is characterized in that possessing: acceptance division, receive the notice of carrying out the reception frame group received off and on from base station, according to the notice reception frame group of this reception frame group; And control part, when above-mentioned acceptance division have received the frame belonging to this reception frame group, when Multicast Association packet is contained in this frame, control above-mentioned acceptance division, to make the reception carrying out multicast packet according to these Multicast Association data.

According to the present invention, a kind of relay is also provided, multicast type information transfer service is provided to mobile device by 1 in multiple channel, possess: the 1st paging information determining means, for the channel of above-mentioned information transfer service, predetermine the 1st paging information, the 1st paging information for determine mobile device should supervising connections for calling notice frame, i.e. call notification monitored object frame; Data dissemination frame determining means, decides the frame of the data for distributing information transfer service based on the 1st paging information predetermined for each channel; And the 2nd paging information determining means, for the mobile device of at least 1 that have selected in above-mentioned multiple channel, the 2nd paging information is decided based on the 1st paging information, 1st paging information is for 1 in the channel selected by this mobile device and predetermined paging information, and the 2nd paging information is used for determining call notification monitored object frame.

By the channel of each information transfer service selected by mobile device to determine paging information, thus, the data of multicast type information transfer service can be sent in frame synchronization with call notification monitored object, and can lengthen between stand-down further, the consumed power of mobile device can be reduced further.

Accompanying drawing explanation

Fig. 1 be represent the present invention the figure of an example that forms of the network that is suitable for.

Fig. 2 represents the figure for an example of the formation of the frame of distribution group multicast data in the network of Fig. 1.

Fig. 3 is the figure illustrated for the frame (Multi-BSMBS disassociation frame) of distribution group multicast data and the relation of call notification monitored object frame.

Fig. 4 is the synchronous figure that Multi-BSMBS disassociation frame and call notification monitored object frame are described.

Fig. 5 is the block diagram of the formation of the device (system) represented involved by the 1st execution mode of the present invention.

Fig. 6 is the figure representing that the network involved by the 1st execution mode of the present invention is formed.

Fig. 7 is the figure of the control sequence represented in the 1st execution mode of the present invention.

Fig. 8 is the flow chart of an example of the determining method representing the 2nd paging information.

Fig. 9 is the flow chart of an example of the determining method representing multicast data delivery frame.

Figure 10 is the block diagram of the formation of the device (system) represented involved by the 2nd execution mode of the present invention.

Figure 11 is the figure representing that the network involved by the 2nd execution mode of the present invention is formed.

Figure 12 is the figure of the control sequence represented involved by the 3rd execution mode of the present invention.

Figure 13 is the figure of the control sequence represented involved by the 4th execution mode of the present invention.

Embodiment

Relate to a kind of base station in this embodiment, this base station utilizes any one reception in frame group to carry out call notification to mobile device, this reception frame group is that this mobile device carries out the intermittent reception frame group received, in this base station, possesses sending part, this sending part utilizes any one in above-mentioned reception frame group to the Multicast Association data needed for the reception sending multicast packet, thus in this mobile device, carry out the reception of these Multicast Association data by the reception of above-mentioned reception frame group, thus this base station makes mobile device effectively carry out the reception of multicast packet.In addition, preferably the moment of carrying out call notification is decided by the epigyny device of base station.

Fig. 1 represents form example of the Access Network as the Multi-BSMBS that the realization of the relay of multicast type information transfer service or an example of relay system can be provided to be supported by IEEE802.16e to the user of mobile device (MS).

This Access Network possesses the gateway (GW) 12 that is connected with core network 10 and is connected with GW12 and the multiple base stations (BS) 16 be wirelessly connected with MS14.In addition, GW is positioned at the upper of BS, so can be described as the epigyny device of BS.

GW12 comprises for providing the MBS server 18 of multicast type/broadcast-type information transfer service (MBS) and for providing the paging controller/Home Location Register (PC/LR) 20 of session services.GW12 manages connected multiple BS16.

MBS server 18, from core network 10 receiving multicast data, determines its delivery time, gives multicast packet (22) and send to multiple BS16 determined delivery time.

PC/LR20 is the functional block of management standby mode/paging, if receive the call data for the MS standby mode from core network 10, then sends call notification (PagingAnnounce) 24 to multiple BS.

In Multi-BSMBS, form MBS district by multiple BS, the BS comprised in same MBS district, in same timing, uses identical subchannel, symbol, modulation system, multicast CID (connection ID) to broadcast same multicast packet.In the example depicted in figure 1,3 BS16 form MBS district 26.On the other hand, as long as MS14 moves in same MBS district because as described above in district which BS all broadcast same multicast packet, so need not (again) log in specific BS just can continuous reception multicast packet.

Further, if MS receives the frame once comprising multicast packet, then know the numbering of the frame distributing next multicast packet, thus during this period, enter dormant state, consumed power (with reference to Fig. 2) can be reduced.MS knows that the numbering of the frame distributing next multicast packet is because recite the numbering of the frame of once distribution group multicast data in the frame received.BS16 is configuration frame in this way.In the example in figure 2, if MS receives the frame of frame number=111, then know that the frame of distribution group multicast data is next time the frame of frame number=114, if thus do not need to monitor the call notification in session services, then can enter dormant state during the frame of transmission frame numbering=112,113.

Each frame of Fig. 2 is described in detail.MBS-MAP_IE in the DL-MAP of the frame of MS received frame numbering=111.The formation that DL-MAP definition is relevant with the down link (DL) of frame, MBS-MAP_IE is one of information element of this DL-MAP.In the frame of frame number=111, MBS-MAP_IE indicates the region comprising MBS-MAP message in frame.MBS-MAP_IE is in order to represent the position in this region and the SymbolOffset(symbol offset comprised in frame) etc.Next MS, by receiving MBS-MAP_IE, just can read MBS-MAP message.MBS-MAP message comprises MBS-DATA_IE as information element.The frame (frame number=114) that next multicast packet is distributed in MBS-DATA_IE instruction and the region comprised in the frame of this multicast packet.Further, MBS-DATA_IE indicates the frame (frame number=115) distributing next MBS-MAP message and the region comprised in the frame of this MBS-MAP message.Want the multicast packet of the content received as MS, be the MBS-DATA conveying in Fig. 2, MBS-MAP_IE, MBS-MAP, MBS-DATA_IE are in addition the control datas needed for the reception of multicast packet.MBS-DATA_IE, in order to indicate the region in the frame of the frame of distribution group multicast data, distribution MBS-MAP message and each comfortable frame, comprise FrameOffset(vertical shift), the SymbolOffset in frame, the Subchannel_offset(subchannel skew in frame) etc.The MBS-MAP message that MS contains MBS-DATA_IE by receiving package can read the frame distributing next multicast packet and the frame distributing next MBS-MAP message.If MS can receive next MBS-MAP message, then can read the distribution frame of next multicast packet and the frame of distribution next MBS-MAP message more again, therefore, after this, even if not receive, the MBS-MAP_IE decoded in DL-MAP, also can receiving multicast data in order.

In addition, in fig. 2, a MBS-DATA_IE is only comprised in MBS-MAP, but, in the specification of IEEE802.16e standard, MBS-MAP can comprise multiple MBS-DATA_IE, recites the multicast CID of the multicast packet indicated by MBS-DATA_IE in each MBS-DATA_IE, thus, when having distributed multiple multicast channel, MS optionally can receive only the multicast channel wishing to receive, the multicast packet of namely wishing the multicast CID received.

In the prior art, the frame of distribution group multicast data only decides based on the delivery time of incidentally specifying multicast packet (absolute time).Such as, BS16 is the frame of distribution group multicast data the frame decision nearest from specified delivery time.This determining method, needs to be set as in advance, by the unswerving mode of the timing of the frame of distribution group multicast data, in all BS in MBS district, determines in the same way.

GW12 carries out the delay measurements between BS-GW termly, according to this measurement result, determines the delivery time that BS16 can distribute.Further, the MBS server 18 of GW12 when specifying delivery time to BS16, the BS16 in MBS district 26 and possess the absolute timing synchronization of GW12 chien shih of MBS server 18.As synchronous method, such as, BS16 and GW12 is had to have the utilization etc. of method for the GPS (GlobalPositioningSystem) of delivery time and NTP (NetworkTimeProtocol).

MS14 in standby mode does not log in specific BS16, but periodically monitor whether BS16 broadcasts call notification (PagingAnnounce), when having carried out broadcast, confirm that the traffic (call data) being sent to MS14 sends, depart from standby mode, receipt of call data.Realize the calling for MS14 like this.In the example in fig 1, BS16 broadcasts the MAC administrative messag of IEEE802.16e and MOB_PAG-ADV as call notification.

In the example in fig 1,3 BS16 form paging group 28.MS14 in standby mode does not log in specific BS16, but is in which paging group to PC/LR20 notice.PC/LR20 sends call notification to all BS16 of the paging group belonging to MS14 place.

MS, according to the paging cycle, the paging offset that determine by each MS, determines the frame number of monitored object.Enter dormant state in image duration in addition, can consumed power be reduced.The condition of the frame number of the start frame of call notification monitored object frame is as follows.

Frame number modulo paging cycle=paging offset

Such as, at paging cycle=10 [frame], paging offset=2 [frame], when paging siding-to-siding block length=2 [frame], as shown in Figure 3, frame number=112,113 frame become call notification monitored object frame.Here, paging siding-to-siding block length is the set point of system.In the past, paging cycle, paging offset were by the different value of each MS, when entering standby mode, between determine.PC/LR20, when sending call notification to BS16, comprises the MSID of the MS as paging object, paging cycle, paging offset (Fig. 1) in call notification message.BS16, according to above-mentioned formula, calculates the frame number of call notification monitored object frame, in the timing of the frame of this frame number of transmission, sends MOB_PAG-ADV (being included in this frame).In addition, changing paging cycle by each MS is to adjust the response time of MS to calling by each MS.Paging cycle is shorter, and the response time just can be shorter, and but, call notification monitored object frame can frequently produce, and the power consumption of MS can increase.Further, paging offset is changed to make MOB_PAG-ADV not concentrate on specific frame by each MS.If MOB_PAG-ADV concentrates on specific frame, then can the frequency band of delivery user data can diminish in the frame.

If independent of multicast packet, such as determine the paging information such as paging cycle, paging offset by each MS, then as shown in the example in figure 3, occurring the situation becoming frame number=112 of quiescent period for multicast packet, the frame of 113 becomes call notification monitored object frame, is disadvantageous from the viewpoint of low consumpting power.

In the present invention, as shown in Figure 4, make the call notification monitored object frame synchronization of the MS from the timing and standby mode of the data of the broadcast-type information transfer service such as BS transmission Multi-BSMBS disassociation frame, thus reduce the frame needing to receive, realize the low consumpting power of MS.

In the diagram, with the call notification monitored object frame of MS, i.e. frame number=114,115 frame have sent Multi-BSMBS disassociation frame (such as, send the frame of the frame in order to the data needed for receiving multicast data, transmission multicast packet), different from the situation of Fig. 3, MS can frame number=112,113 frame send during, enter dormant state.

In the present embodiment, be the call notification monitored object frame determined by each MS before deciding based on user-selected channel, make multicast distribution frame consistent with call notification monitored object frame, thus substantially realize above-mentioned frame synchronization.In addition, saying it is consistent, also can be not quite identical.Such as, in call notification monitored object frame, at least send Multicast Association frame, or in call notification monitored object frame, send the information of sending zone (regularly, the information such as subchannel) of designated multicast data.And, if MS detects the sending zone of multicast packet by the reception of call notification monitored object frame, be then received in the wireless signal that specified region sends.Here, specified region also preferably call notification monitored object frame.

An example of the formation this realized is represented in Fig. 5.The 1st paging information determination section 30 arranged in GW12 is by the channel (CID) of each multicast packet from MBS server 18 distribution, such as consider the data characteristic of each channel, determine the paging information such as paging cycle, paging offset, as " the 1st paging information ".The 1st determined paging information is notified the multicast data delivery frame determination section 32 in BS16.Multicast data delivery frame determination section 32 presses the mode of the call notification monitored object frame synchronization determined with " the 1st paging information " that determine each channel (CID), determine the multicast data delivery frame (selecting the frame carrying out the transmission of Multicast Association data from determined call notification monitored object frame) of each channel, the Multicast Association data (multicast packet) from MBS server 18 are distributed to MS14.

In MS14, select one of channel of the multicast packet from BS16 distribution, thus start the reception of multicast packet.When the channel (CID) now and by MS selected is changed, selected or select the channel after changing to notify the 2nd paging information determination section 34 from the transmission and reception unit 13 of MS14 through BS16.2nd paging information determination section 34 decides the 2nd paging information based on the paging information corresponding to the channel selected from the 1st paging information about the determined each channel of the 1st paging information determination section 30 by MS14, notify PC/LR20, entrust the change to it.If now there is the request (request paging cycle) of the paging cycle from MS, then consider that it decides the 2nd paging information.Aftermentioned about its details.PC/LR20 changes to notified paging information the paging information of this MS, the paging information after changing is notified MS14, and indicates BS16, allows it utilize the paging information determined call notification monitored object frame after changing to send call data later.In addition, for arranging the 1st paging information determination section, the situation of both the 2nd paging information determination sections is illustrated, and but, is not limited to this formation.

That is, as long as multicast data delivery frame determination section (sending part) 32 pairs of mobile devices of BS utilize any one frame comprised in the frame group (G) of regulation to send Multicast Association data.Herein, as long as the frame group (G) of this regulation is frame group that is identical with the frame group that the mobile device (preferably receiving all mobile devices of this BS subordinate of these Multicast Association data) of the destination sending Multicast Association data carries out receiving off and on or that wherein comprise.If the GW of the call information generating apparatus as generation call information, then possesses PC/LR20 (control part), this PC/LR20 (control part), for the mobile device of reception carrying out certain multicast packet, indicate this mobile device, make it receive identical with the frame group of this regulation (G) off and on or comprise its frame group.In addition, when the channel of the transmission carrying out multicast packet has multiple, identify the frame group (Gchx) of regulation by each channel, the frame group G of the frame group of the regulation of correspondence (Gchx) as regulation is used and carry out same process.

The transmission and reception unit 13 of MS14 receives the notice (the 2nd paging information) of frame group, receives frame group off and on according to it.When comprise Multicast Association data in the frame belonging to the frame group that transmission and reception unit 13 has received, control part 15 controls transmission and reception unit 13, makes it carry out the reception of multicast packet according to the Multicast Association data received.

Paging cycle, paging offset and paging siding-to-siding block length is such as comprised in paging information.In a standard, paging cycle, paging offset are different by each MS, and paging siding-to-siding block length is fixed value intrinsic in system.Therefore, in reality, paging siding-to-siding block length also can not be contained in paging information, but is pre-set in each device.Further, according to the difference of system, also there is the situation differently using paging siding-to-siding block length by each MS, thus in this case, paging siding-to-siding block length is contained in paging information.Further, according to the difference of system, also the handlebar paging cycle situation that is taken as fixed value intrinsic in system to use, thus in this case too, can not be contained in paging information paging cycle, but be pre-set in each device.It in the parameter determined needed for call notification monitored object frame is at least the parameter dynamically changed that paging information will be included as.

In addition, in the example as shown in fig. 5,1st paging information determination section 30, the 2nd paging information determination section 34 are arranged in GW18, multicast data delivery frame determination section 32 is arranged in BS16, but, in WiMAXForumNWG (NetworkWorkingGroup) standard, also define the device that BS and GW is integrated type, in this case, BS can possess all functions.

Further, the outfit of these functions in GW12 and BS16 is not limited to the formation of Fig. 5, as long as these functions are contained in GW12 and BS16 entirety.

(execution mode 1)

Below illustrate in greater detail the 1st execution mode.

(Notification Method of the 1st paging information)

In the 1st execution mode shown in Fig. 6, except shown in Fig. 1, GW12 notifies BS16 the 1st paging information.Notify that the notification message 36 of the 1st paging information is made up of multicast channel and the paging information corresponding with it.When sending multiple 1st paging information, in paging information notification message 36, comprise multiple multicast channel and the multiple paging informations corresponding respectively with them.GW12 when GW12 and BS16 is connected with core network 10, when changing for multicast channel paging information and when changing the formation of multicast channel (increase and decrease of such as multicast channel) send a notification message 36.Further, GW12 also can be not GW12 and BS16 be connected with network time, but in MBS district 26, wish that the MS first time of receiving group channel is when having occurred, sends the paging information notification message 36 relevant with the multicast channel that MS asks.

(prerequisite of the network application in execution mode 1)

In the 1st execution mode, as an example, network to be used in the following manner.Following situation not yet determines in IEEE802.16e standard, WiMAXForumNWG standard, can freely use.

1. multicast channel, IP multicast address and multicast CID press the relation utilization of in pairs.

2.MS obtains the IP multicast address wanting the multicast channel received from content server, establishes the service procedure specifying this IP multicast address between MS<=>BS, thus receives the multicast packet with this multicast CID.

3. the multicast channel that MS can receive simultaneously is set to 1 channel substantially.Or be set to, when allowing that MS receives multiple multicast channel simultaneously, request in the multicast channel of reception at this MS, consistent with up-to-date multicast channel, determine the paging information of this MS.

4. the BS in same MBS district makes frame number synchronous.

Above-mentioned 1 and 2 define MS specifies the multicast channel (=suitable with the channel of TV) wanting to receive method to network.In a standard, how non-regulation MS specifies and wants that the content received just can obtain the multicast CID of IEEE802.16e layer.Above-mentioned situation by IP multicast address, multicast channel and multicast CID is associated.If know multicast CID, then according to the regulation of IEEE802.16e, MS just can receiving multicast data.

In addition, foregoing server refers to the base server preserved and carried out the content of distributing by multicast channel, is generally configured in core network 10.

About above-mentioned 4, be because, if the frame number of the frame of certain time transmission is inconsistent between BS, even if then consistent at BS chien shih paging information, between BS, call notification monitored object frame also can be different, so cannot make the transmission timing and the call notification monitored object frame synchronization that send Multi-BSMBS disassociation frame from BS.Therefore, the BS in identical MBS_Zone will make frame number synchronous.As synchronous method, such as with good grounds each BS decides the method for frame number from the absolute time that GPS obtains.The present invention does not get rid of the synchronous method of frame number in addition.

Further, in the present invention, the standard message (between=MS-BS message) of IEEE802.16e need not be changed, just can solve problem.

(determining method of the 1st paging information)

[table 1]

Table 1

As shown in table 1, the 1st paging information determination section 30 (Fig. 5) of GW12 decides the 1st paging information by each multicast channel in advance.This is to define the frame group sending Multicast Association data by each multicast channel individually, when being set to identical, also uniformly can determining 1 the 1st paging information.In Table 1, paging information is set to paging cycle and paging offset.As mentioned above, also paging siding-to-siding block length can be comprised in paging information.About the determining method of the 1st paging information, bottom line, determines any one paging information uniquely by each multicast channel., there is the following tendency described, thus, preferably the 1st paging information determination section 30 considers that this decides the 1st paging information.

Generally speaking, multicast packet has the data characteristic by each multicast channel.Such as, every a few cycle carries out the transmission etc. of multicast packet.The paging cycle transmission cycle that is best and this multicast packet is same period.Be set to, obtain the transmission cycle of multicast packet from content server.If paging cycle is shorter than the transmission cycle of multicast packet, then MS must monitor the frame beyond the reception opportunity of multicast packet, is unfavorable for the low consumpting power realizing MS.On the other hand, if paging cycle is longer than the transmission cycle of multicast packet, then MS can be elongated to the response time of call notification.Even if prolongation paging cycle, multicast packet also must receive with the interval shorter than it, thus cannot reduce the consumed power of MS.

For paging offset, preferably set by with the mode that the call notification monitored object frame of other channels does not overlap, and by the call notification monitored object frame of MS do not concentrate on a frame mode, decide dispersedly.

For paging siding-to-siding block length, determine to be 2 ~ 5 [frames] by IEEE802.16e standard, the amplitude that can change is narrow, but, when the reception MS increasing number of each multicast channel, preferably extends.In IEEE802.16e standard, use which frame between paging zone broadcast as call notification MOB_PAG-ADV can, thus paging siding-to-siding block length is more long more can prevent call notification from concentrating on the situation of a frame.

Further, as mentioned above, notify from the 1st paging information determination section 30 of GW12 to the multicast data delivery frame determination section 32 of BS16 the 1st paging information that determines by each channel.

(explanation of control sequence)

According to the precedence diagram of Fig. 7, execution mode 1 is described below.

Fig. 7 describes and changes the situation of receiving group channel to the multicast packet of this multicast channel of reception from MS, and MS changes standby mode into from normal mode in this sequence.Even if, if find that the multicast channel that will newly receive is the receiving group channel after change on Fig. 7, then can realize with same order when the new request receiving multicast channel of MS also.Also have, when MS is in standby mode, at change receiving group channel, or during new receiving group channel also, in order to receiving group channel transfer to Access Network, need temporarily to depart from standby mode, enter normal mode, as a result, after entering normal mode, enter the order same with Fig. 7.

Step 1001:MS is altered to multicast channel 2 receiving group channel.

Step 1002:MS obtains the IP multicast address 2 corresponding with multicast channel 2 from content server in advance, IGMP (InternetGroupManagementProtocol) the Join message comprising IP multicast address 2 is sent to GW by BS, joins the IP multicast group of IP multicast address 2.That is, MS carries out receiving group channel Notification of Changes by IGMPJoin message.

The 2nd paging information determination section 34 of step 1003:GW detects the change of the receiving group channel of MS.

Step 1004 ~ 1007: the DSA-REQ/RVD/RSP/ACK message of IEEE802.16e definition is pressed in transmission and reception between MS and BS, thus establishes the service procedure of the multicast packet 2 of multicast channel 2.After establishing service procedure, if BS receives the multicast packet 2 with IP multicast address 2, multicast CID2 will be used to broadcast to down link.In addition, when establishing service procedure by other MS, the effect to the MS notice multicast CID2 corresponding with IP multicast address 2 is just only played in step 1004 ~ 1007.

Step 1008: by step 1004 ~ 1007, MS obtains multicast CID2.Thus, MS just can receive the multicast packet 2 that BS sends.

Step 1009:MS sends DREG-REQ to change standby mode into.This DREG-REQ comprise MS request paging cycle, namely ask paging cycle.The BS that have received DREG-REQ sends the MSInfoReq comprising request paging cycle.

The 2nd paging information determination section 34 of step 1010:GW obtains the request paging cycle of MS from PC/LR20, the 1st paging information determined by each channel is obtained from the 1st paging information determination section 30, according to two parameter, the paging information (the 2nd paging information) of decision objects MS, the paging information carrying out object MS to PC/LR20 changes trust (with reference to Fig. 5).At this moment, the 2nd paging information determination section 34 makes the paging information of object MS change the MSID and the paging information (the 2nd paging information) that comprise object MS in trust.Details about " determining method of the 2nd paging information " is aftermentioned.

The PC/LR of step 1011:GW utilizes MSInfoRsp to notify paging information.BS utilizes DREG-CMD to notify paging information to MS.If MS have received DREG-CMD, then change standby mode into.

Step 1012: have received the MS of DREG-CMD based on the paging information comprised in DREG-CMD, setting paging cycle/skew.

The MBS server 18 of step 1013:GW is sent to the multicast packet 2 that addition of delivery time the BS in MBS district.

The multicast data delivery frame determination section 32 of the BS in step 1014:MBS district, according to the 1st paging information obtained in advance, determines multicast data delivery frame, utilizes multicast CID2 to carry out broadcast multicast data 2.Details about this " determining method of multicast data delivery frame " is aftermentioned.

(determining method of the 2nd paging information)

Describe the determining method of the 2nd paging information in the 2nd paging information determination section 34 in detail.

Fig. 8 is the flow chart of the determining method of the 2nd paging information.

2nd paging information determination section 34 is such as when thinking little of the request paging information from MS (step 1100), be the most simply obtain from the 1st paging information table of table 1 with change after paging information corresponding to multicast channel, it is directly determined be that the 2nd paging information can (step 1102,1104).

But, also the 2nd paging information can not be taken as and the identical value of the 1st paging information.When wanting the system cloud gray model carrying out paying attention to the request paging cycle that MS has asked, also can consider that request paging cycle decides the 2nd paging information.

In this case, if request paging cycle is than the paging cycle little (step 1106) in the 1st paging information of table 1, then using in the paging cycle in the 1st paging information and approximate number thereof from request paging cycle nearest person as the paging cycle (step 1108) of the 2nd paging information.Also have, as the paging cycle of the 2nd paging information, when have selected the cycle of the paging cycle being different from the 1st paging information, using the remainder of the paging offset gained with selected paging cycle removal the 1st paging information as the paging offset (step 1110) in the 2nd paging information.

Such as, in paging cycle=50 [frame] of the 1st paging information, paging offset=27 [frame], when request paging cycle=23 [frame], approximate number i.e. 25 [frames] of paging cycle=50 [frame] are nearest from request paging cycle, thus it can be used as the paging cycle of the 2nd paging information.Further, the paging offset of remainder 2 as the 2nd paging information removing 27 gained using 25.Like this, every 50 [frames] occur to obtain synchronous with multicast data delivery frame 1 time in the call notification monitored object frame interval of 2 times.Some can not obtain synchronously conversely speaking, is thus unfavorable for the consumed power of MS.If the paging cycle of asking with MS, namely the shortening of call time is compared, and as mentioned above, more payes attention to the consumed power of MS, then no matter ask paging cycle, the 2nd paging information is taken as and identical value the with the 1st paging information gets final product (step 1102,1104).

On the other hand, when asking paging cycle larger than the paging cycle in the 1st paging information of table 1 (step 1106), the 1st paging information is directly got final product (step 1102,1104) as the 2nd paging information.When asking paging cycle larger than the paging cycle in the 1st paging information of table 1, the multiple of the paging cycle paging cycle of the 2nd paging information being taken as the 1st paging information also can be considered., even if strengthen paging cycle, also need with the interval shorter than it to receive Multi-BSMBS disassociation frame, thus the consumed power of MS can not reduce.Therefore, do not strengthen paging cycle, but make it identical with the paging cycle of the 1st paging information in advance, there is the advantage that can shorten the call time.In addition, the present invention does not get rid of the situation of the multiple paging cycle of the 2nd paging information being taken as the paging cycle of the 1st paging information.

(determining method of multicast data delivery frame)

Describe the determining method of the multicast data delivery frame that multicast data delivery frame determination section 32 performs in detail.

Fig. 9 is the flow chart of the determining method of multicast data delivery frame.

The determination section 32 of multicast data delivery frame obtains the 1st paging information of table 1 in advance.

When have received the multicast packet of certain channel, multicast data delivery frame determination section 32, after a certain amount of buffering, is sent to MS.MBS server 18 is on the basis expecting the delay that this buffering causes conversely speaking, and setting is attached to the delivery time of multicast packet.

First, during beginning, multicast data delivery frame determination section 32 decides the frame number of the frame sending the multicast packet cushioned and the numbering (step 1200) for the frame that is sent as the association control frame sent needed for this frame according to delivery time.Following frame and the association control frame sent needed for it sending multicast packet is generically and collectively referred to as Multi-BSMBS disassociation frame.

Secondly, multicast data delivery frame determination section 32 is appointed as regulating object Multi-BSMBS disassociation frame (step 1202) the Multi-BSMBS disassociation frame beyond the Multi-BSMBS disassociation frame overlapped with the call notification monitored object frame determined according to the 1st paging information in this stage.

Secondly, multicast data delivery frame determination section 32 is by the process of step 1206 ~ 1226, about the call notification monitored object frame do not overlapped with Multi-BSMBS disassociation frame (=receive object frame), with from receive object frame frame pitch from the mode that overlaps with reception object frame of nearest regulating object Multi-BSMBS disassociation frame, the frame number of change and adjustment object Multi-BSMBS disassociation frame.Herein, if at this moment allow to change in the nonreversible scope of the sending order of each frame of Multi-BSMBS disassociation frame.When not meeting this condition, using next frame pitch from close to regulating object Multi-BSMBS disassociation frame as the change object of frame number.Equally, in the unappeasable situation of condition of said sequence reversion, about this call notification monitored object frame, that does not carry out between Multi-BSMBS disassociation frame is synchronous, is set to handling object ensuing with the call notification monitored object frame that Multi-BSMBS disassociation frame does not overlap.

Be described according to the flow chart of Fig. 9, first, 1 in the call supervision object frame do not overlapped with Multi-BSMBS disassociation frame be appointed as and receive object frame (step 1206), counting is taken as 1 (step 1208).From receive object frame frame pitch from nearest regulating object Multi-BSMBS disassociation frame (if having multiple, being wherein 1) be appointed as and receive the frame number that object frame overlaps and change candidate frame (step 1210), judge the reversion (step 1212) whether frame sequential does not occur when changing frame number, and whether the amount of change of frame number is below threshold value (step 1214).When there is the reversion of frame sequential or the amount of change of frame number is not less than threshold value, if count the threshold value (step 1216) less than counting, then current frame number is changed candidate frame and remove (step 1218) from regulating object, make counting increase by 1 (step 1220), turn back to the process of step 1210.In step 1216, if counting reaches the threshold value of counting, specifying ensuing reception object frame (step 1226) with regard to not carrying out the adjustment relevant with this reception object frame, turning back to the process of step 1208.In step 1212,1214, if the reversion of non-order of occurrence and the amount of change of frame number are also less than threshold value, just the frame number of frame number change candidate frame is changed to the frame number (step 1222) receiving object frame, it is removed (step 1224) from regulating object and merges with the process of step 1226.

If carried out in a manner described, the call notification monitored object frame synchronization of the MS of transmission regularly and standby mode sending Multi-BSMBS disassociation frame from BS just can be made.In addition, in step 1214, the amount of change of frame number being restricted to less than threshold value is to make beating of multicast packet can not become large.

(execution mode 2)

In above-mentioned 1st execution mode, determine that the multicast data delivery frame determination section 32 of the frame number of the frame of distribution group multicast data is arranged in BS16.In the present embodiment, as shown in Figure 10, this multicast data delivery frame determination section 32 is not be arranged in BS16 but be arranged in GW12.Therefore be the multicast packet 22 sent from GW12 to BS16 with delivery time as shown in Figure 6 in the 1st execution mode, and in the present embodiment, as shown in Figure 11, be that transmission frame numbering has determined complete multicast packet 40, do not send the 1st paging information 36 (with reference to Fig. 6) determined by each multicast channel.

In the present embodiment, not only synchronous in BS chien shih frame number, and also the synchronous of frame number is carried out between multiple BS-GW.

In the present embodiment, as shown in Figure 10, GW12 possesses multicast data delivery frame determination section 32, possesses multicast data delivery portion 42 in BS16.If the multicast data delivery frame determination section 32 of GW12 achieves multicast packet from MBS server 18, then obtain the 1st paging information about the multicast channel sending multicast packet from the 1st paging information determination section 30, decision transmission frame is numbered, be supplied to multicast packet, be sent to the multicast data delivery portion 42 of BS16.The multicast packet to multicast data delivery frame determination section 32 obtains from MBS server 18 is not needed to provide delivery time.Multicast data delivery frame determination section 32 carries out buffering to a certain degree by the order that MBS server 18 receives, and determines that transmission frame is numbered with the method that the execution mode 1 with above-mentioned is same.Herein, delivery time is not notified from MBS server 18, thus multicast data delivery frame determination section 32 with and MBS server 18 receives time identical interval, interval, multicast packet is arranged with continuous print frame and mates, first, after temporarily determining the transmission frame numbering of each frame, same with above-mentioned execution mode 1, according to the 1st paging information, change transmission frame numbering, final decision transmission frame numbering.

The multicast data delivery portion 42 of BS16, according to the delivery frame numbering received, sends multicast packet to MS.

(execution mode 3)

The method that present embodiment is expressed as follows, namely the situation of the data characteristic as changed multicast channel, when changing the 1st paging information according to the request of network facet, notifies the method for the 2nd paging information to the MS in standby mode.

In the present embodiment, the call notification for asking LU (LocationUpdate: location updating) is sent to notify paging information to MS to MS.Thus, MS performs LU, is changed the paging information of MS by LU.

By notifying the paging information of MS with method as described above, thus MS can not depart from standby mode and carry out the change of paging information.

Be described according to the order of Figure 12 below.

The 1st paging information shown in step 1301:GW list of modification 1.As change reason, the situations such as the data characteristic changing multicast channel can be enumerated.

The 2nd paging information determination section 34 (Fig. 5 or Figure 10) of step 1302:GW asks PC/LR20 to send the call notification carrying out LU request for all MS (following is this MS group) to the channel received as change object.Next, PC/LR20 sends the call notification on ground for the purpose of this MS group to all BS in same paging group.The PagingCause(paging reason of this call notification) hurdle represents LocationUpdate (LU).It means following message, is not namely to ask this MS group to depart from standby mode to carry out receipt of call data, but asks this MS group to perform the message that can change the LU of the paging information of this MS group.That is, PC/LR indicates this MS group to perform LU, changes the paging information of this MS group thus.The BS that have received call notification (LU request) broadcasts MOB_PAG-ADV.The ActionCode(action code of MOB_PAG-ADV) hurdle illustrates 0b01, and its represents is the message of carrying out LU request to this MS group.Following step 1303 ~ 1307 represents whole LU process.

Step 1303:MS sends RNG-REQ.The RangingPurposeIndication(of this RNG-REQ adjusts object instruction) Bit#1 be ' 1', represent LU.Further, this RNG-REQ comprise MS request paging cycle, namely ask paging cycle.The BS that have received this RNG-REQ sends the LURequest comprising request paging cycle.

The 2nd paging information determination section 34 of step 1304:GW according to the flow process shown in Fig. 8, the paging information of decision objects MS, and notify PC/LR.

The PC/LR of step 1305:GW utilizes LUResponse to notify paging information.BS utilizes RNG-RSP to notify paging information to MS.

Step 1306:BS utilizes LUConfirm to notify GW the situation that have sent RNG-RSP to MS.

Step 1307: the MS that have received RNG-RSP changes to the paging information of MS the paging information comprised in RNG-RSP.

(execution mode 4)

In the embodiment described above, need to change normal mode into from standby mode in order to the selection of multicast channel and the change of selection, and in the present embodiment, by transmission and reception LocationUpdate message, carry out the Notification of Changes of receiving group channel and obtaining of multicast CID, thus the MS in standby mode is not departed from change that standby mode just can carry out receiving group channel.

In the present embodiment, the message specification of IEEE802.16e standard can be changed, utilize RNG-REQ conveying multicast channel, utilize RNG-RSP conveying multicast CID.

Be described according to the order of Figure 13 below.

Step 1401:MS changes to channel 2 receive channel.

Step 1402:MS sends the RNG-REQ comprising the numbering of wishing the channel received.Except comprise wish receive channel numbering except, identical with the RNG-REQ in the step 1303 of Figure 12.

The BS that have received this RNG-REQ sends the LURequest comprising the numbering (channel 2) of wishing receive channel.This RNG-REQ and LURequest except comprise wish receive channel numbering except, identical with RNG-REQ and LURequest in the step 1303 of Figure 12.

The 2nd paging information determination section 34 (Fig. 5 or Figure 10) of step 1403:GW detects the change of the receiving group channel of MS.

The 2nd paging information determination section 34 of step 1404:GW is according to the flow process shown in Fig. 8, and the paging information of decision objects MS, notifies PC/LR.

The PC/LR of step 1405:GW utilizes LUResponse to notify the numbering (channel 2) of paging information and receive channel.BS utilizes RNG-RSP that paging information and the multicast CID2 corresponding with channel 2 are notified MS.

Step 1406:BS utilizes LUConfirm that the situation that have sent RNG-RSP to MS is notified GW.

Step 1407:MS obtains multicast CID2 by RNG-RSP.

Step 1408: the MS that have received RNG-RSP changes to the paging information of MS the paging information comprised in RNG-RSP.

Step 1409 ~ 1410: same with step 1013 ~ 1014 of Fig. 7.

According to embodiments of the present invention described above, make the call notification monitored object frame synchronization of the MS of transmission regularly and standby mode sending Multi-BSMBS disassociation frame from BS, thus the frame needing to receive can be reduced, the low consumpting power of MS can be realized.

Further, can the call notification monitored object frame of the MS in standby mode be made to be matched with the 1st paging information determined by each multicast channel while the request paging cycle considering MS.

Further, suitable paging cycle can be decided according to the data characteristic of multicast channel.

Further, beating of Multi-BSMBS disassociation frame can be suppressed while the call notification monitored object frame synchronization making the MS of transmission regularly and standby mode sending Multi-BSMBS disassociation frame from BS.

Further, when changing the 1st paging information determined by each multicast channel, MS need not depart from standby mode just can change paging information.

Further, the MS in standby mode need not depart from standby mode just can change receive channel.

Claims

1. a relay, provides multicast type information transfer service by 1 in multiple channel to mobile device, wherein, possesses:

1st paging information determining means, for the channel of above-mentioned information transfer service, predetermines the 1st paging information, the 1st paging information for determine mobile device should supervising connections for calling notice frame, i.e. call notification monitored object frame;

Data dissemination frame determining means, decides the frame of the data for distributing information transfer service based on the 1st paging information predetermined for each channel; And

2nd paging information determining means, for the mobile device of at least 1 that have selected in above-mentioned multiple channel, the 2nd paging information is decided based on the 1st paging information, 1st paging information is for 1 in the channel selected by this mobile device and predetermined paging information, 2nd paging information is used for determining call notification monitored object frame

Above-mentioned Data dissemination frame determining means is with the mode determination data delivery frame of the call notification monitored object frame synchronization determined with the 1st paging information, and the paging cycle comprised in the 2nd paging information that the 2nd paging information determining means determines is the approximate number of the paging cycle comprised in the 1st paging information.

2. relay according to claim 1, is characterized in that,

The 2nd paging information that 2nd paging information determining means determines at least comprises the 1st paging information.

3. relay according to claim 1, is characterized in that,

Above-mentioned Data dissemination frame determining means, comprises:

Characteristic based on the data that should distribute carrys out the unit of the frame number of temporary transient determination data delivery frame; And

For the 2nd frame do not overlapped with call notification monitored object frame in the frame of the 1st frame do not overlapped with the frame of the frame number temporarily determined in the call notification monitored object frame determined by the 1st paging information and the temporary transient frame number determined, constant in the distribution order of data, and frame number be changed to the condition of below predetermined threshold value under, the unit the 2nd frame being overlapped by the frame number changing the 2nd frame with the 1st frame.

4. relay according to claim 1, is characterized in that,

When changing above-mentioned 1st paging information according to the request from relay side, the decision of the 2nd paging information based on the 1st paging information after changing and be carry out according to the order of the location updating started according to the request from relay side to the notice of mobile device.

5. relay according to claim 1, is characterized in that,

When changing the channel selected by mobile device, by for the 2nd paging information based on the 1st paging information that predetermines of channel after changing decision and be carry out according to the order of the location updating started according to the request from mobile device side to the notice of mobile device.

6. relay according to claim 1, is characterized in that,

The 1st paging information that above-mentioned 1st paging information determining means determines comprises paging cycle and paging offset,

Paging cycle determines by the mode that the transmission cycle of the data with information transfer service is equal,

Paging offset is that the mode that the call notification monitored object frame determined by the call notification monitored object frame determined by it and the 1st paging information determined for other channels does not overlap determines.