CN105517011A - Paging optimization method and paging optimization device of coverage enhancement machine-type communication user device - Google Patents
Paging optimization method and paging optimization device of coverage enhancement machine-type communication user device Download PDFInfo
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- CN105517011A CN105517011A CN201410502720.8A CN201410502720A CN105517011A CN 105517011 A CN105517011 A CN 105517011A CN 201410502720 A CN201410502720 A CN 201410502720A CN 105517011 A CN105517011 A CN 105517011A
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Abstract
The invention relates to a paging optimization method and a paging optimization device of a coverage enhancement machine-type communication user device. The method is characterized in that A a downlink coverage enhancement grade of a user device can be determined; B a wireless resource control connection request can be transmitted to a base station, to which the user device belongs, and the wireless resource control connection request comprises the down link coverage enhancement grade of the user device and the reason of establishing the wireless resource control connection. The invention also relates to the base station of the paging coverage enhancement machine-type communication user device and the method and the device for the paging optimization used for the mobile management entity. According to the invention, the resource consumption of the paging retransmission of the user device can be greatly reduced.
Description
Technical field
The present invention relates to wireless communication field, particularly, relate to the method and apparatus of the calling optimization of the machine type communication subscriber equipment for coverage enhancement.
Background technology
Repeating transmission is major programme for the coverage of expanding machinery class communications user equipment (MTCUE) in wireless access network (RAN), to realize successful transmission under the additional coverage requirement of maximum 15dB and reception.According to the conclusion of Radio Access Network working group 1 (RAN1), repetition level is defined as the Three Estate of such as PRACH (PhysicalRandomAccessChannel: Physical Random Access Channel).Different physical channels have for each grade varying number repeat transmission.
Apparently, repeat to transmit and will consume extra system wireless resource.This will affect radio resource efficiency and power system capacity.Therefore the optimal solution repeating to transmit how being designed for the machine type communication subscriber equipment (CE-MTCUE) of coverage enhancement has become an important problem.Different physical channels will have different solutions.
Current, become known for the behavior of the subscriber equipment that discontinuous paging receives, MME (MobilityManagementEntity: mobile management entity) starts paging, and by all eNB be included in tracing area of S1AP (S1 Application Protocol) page notification.Then, the eNB of all correspondences sends RRC (RadioResourceControl: wireless heterogeneous networks) beep-page message by according in the controlled community of the paging occasion of this UE in the tracing area of specifying.For common UE, paging propagation regions is whole tracing area.
For CE-MTCUE, beep-page message also needs repeatedly to be transmitted, to compensate coverage loss.This beep-page message transmission need in time domain repeatedly.If simply the paging mechanism being used for common UE is reused CE-MTCUE, all eNB in tracing area then can repeatedly transmitting paging message in all communities in the tracing area of specifying.Due to the inaccuracy of paging domain, the paging in whole tracing area carried out that repeat to transmit will a large amount of paging Radio Resource of waste by CE-MTCUE simply.Therefore, should consider to be designed for the mechanism of the precision of the paging domain improving CE-MTCUE, the beep-page message improved for the MTCUE of extended coverage range repeats the Radio Resource utilization ratio transmitted.
On the other hand, different coverage enhancement grades correspond to varying number repeat transmission.If eNB does not have the information of the coverage enhancement grade of UE, then it only can repeat transmitting paging message, to ensure that UE correctly can receive/decoding paging messages according to the grade of the worst situation.This does not need the so many CE-MTCUE repeating to transmit by Radio Resources a large amount of for waste for those.Therefore, preferably can obtain the coverage enhancement class information of CE-MTCUE before paging for eNB.Then, eNB can with suitable iterative transfer times paging object UE, to realize the most rational utilization of resources.
Fig. 1 shows this calling optimization problem.Be the paging way according to prior art in left figure, first, MME is by all eNB in tracing area of S1AP paging; Then, all eNB carry out RRC paging in all communities being under the jurisdiction of this eNB; So object UE can receive this beep-page message.And in right figure, be the paging way after optimizing, and first-selected, the eNB that MME is subordinate to by S1AP only paging object UE; Then, this eNB also only carries out RRC paging in the community at object UE place, and meanwhile, the number of repetition of this RRC paging corresponds to coverage enhancement grade.
In addition, the current UE for idle pulley is there is not its contextual information in the enb, but MME then safeguards the contextual information of this UE after UE powers on and terminates attachment/registration process always.Consider the mobility of UE and should reduce Signalling exchange, unless tracking area update, otherwise UE can not by information notification eNB or MME of re-selecting cell.Based on this, because eNB can not comprise the contextual information of idle UE, so for the UE of idle pulley, its coverage enhancement class information should be stored in MME.
Based on analysis above, for the paging of CE-MTCUE, we need to design and reduce the mechanism of paging domain with higher accuracy, and use suitable repetition grade of transmission to realize using and less impact on common UE of more effective Radio Resource.Our optimization aim accurately can consume the least possible repetition resource in Target cell for the paging of CE-MTCUE.
Summary of the invention
The subscriber equipment for the machine type communication for coverage enhancement is the object of the present invention is to provide to optimize the method and apparatus of paging, described method is by the community that beep-page message is accurately sent to target UE and is positioned at and select suitable iterative transfer times, can reduce the resource consumption retransmitted for the paging of subscriber equipment widely.
To achieve these goals, a first aspect of the present invention provides a kind of method for calling optimization in the subscriber equipment of the machine type communication of coverage enhancement, said method comprising the steps of: A. determines the described down link coverage enhancement grade of described subscriber equipment; And B. sends wireless resource control connection request to base station that described subscriber equipment is subordinate to, the described down link coverage enhancement grade that described wireless resource control connection request comprises described subscriber equipment and the reason set up wireless heterogeneous networks and be connected.
Pass through said method, subscriber equipment can increase the information of down link coverage enhancement grade in traditional wireless resource control connection request, this information can be used to determine suitable iterative transfer times in paging afterwards, thus realizes the use of rational resource.
Preferably, according to of the present invention in the subscriber equipment of the machine type communication of coverage enhancement in the method for calling optimization, described steps A comprises: when meeting the condition setting up wireless heterogeneous networks connection, determine the described down link coverage enhancement grade of described subscriber equipment.In this way, subscriber equipment is only set up in needs and base station when wireless heterogeneous networks is connected and is just determined down link coverage enhancement grade.This condition setting up wireless heterogeneous networks connection can be traditional, such as, for transfer of data, also can be the condition that the present invention described hereinafter increases newly.
Further preferably, according to of the present invention in the subscriber equipment of the machine type communication of coverage enhancement in the method for calling optimization, described steps A comprises following sub-step further: A1. obtains described down link coverage enhancement grade at Access Layer; A2. at described Access Layer, described down link coverage enhancement grade is informed to Non-Access Stratum; And A3. generates described wireless resource control connection request at described Non-Access Stratum.
Further preferably, according to of the present invention in the subscriber equipment of the machine type communication of coverage enhancement in the method for calling optimization, describedly set up the condition that wireless heterogeneous networks connects and comprise: described subscriber equipment power on or described subscriber equipment reselects the community that will access or described subscriber equipment determines that described down link coverage enhancement grade changes.In this way, except be defined in traditional such as power on or re-selecting cell when set up except wireless heterogeneous networks is connected with base station, also increase a kind of reason setting up wireless heterogeneous networks connection newly newly, namely measured down link coverage enhancement grade and change.This change can be cause due to the movement of described subscriber equipment rise to higher grade or drop to lower grade.
Further preferably, according to of the present invention in the subscriber equipment of the machine type communication of coverage enhancement in the method for calling optimization, described subscriber equipment is determined that described down link coverage enhancement grade changes and is comprised: drop to lower down link coverage enhancement grade from higher down link coverage enhancement grade, wherein, drop to from described higher down link coverage enhancement grade described in the boundary of lower down link coverage enhancement grade be first threshold; Compared with Second Threshold, described first threshold moves predetermined side-play amount on the direction towards described lower down link coverage enhancement grade, and described Second Threshold is the boundary of down link coverage enhancement grade higher described in being increased to from described lower down link coverage enhancement grade; And/or the change of described down link coverage enhancement grade that described subscriber equipment continuous several times is determined is all consistent.
In this way, on the one hand, by arranging stricter condition for described subscriber equipment drops to lower down link coverage enhancement grade from higher down link coverage enhancement grade, with the impact by sacrificing certain Radio Resource to reduce owing to bringing coarse measurement of down link coverage enhancement grade, thus ensure that subscriber equipment is to the successful reception of beep-page message as much as possible.On the other hand, the change of down link coverage enhancement grade is determined by the measurement of continuous several times, the determination of the mistake of the down link coverage enhancement grade caused with the error avoided due to single measurement, thus ensure that subscriber equipment is to the successful reception of beep-page message further.
Further preferably, according to of the present invention in the subscriber equipment of the machine type communication of coverage enhancement in the method for calling optimization, described set up reason that wireless heterogeneous networks connects for report described down link coverage enhancement grade time, described method is further comprising the steps of: D. receives the message connected from the refusal wireless heterogeneous networks of described base station.In this way, on the basis that traditional wireless heterogeneous networks connects, when the reason connected be the present invention specify report down link coverage enhancement grade time, then subscriber equipment after described down link coverage enhancement grade complete to base station repeats, directly accept refuse information and terminate wireless heterogeneous networks connect.
Further preferably, according to of the present invention in the subscriber equipment of the machine type communication of coverage enhancement in the method for calling optimization, described method is further comprising the steps of: E. repeatedly receives the first beep-page message from described base station, and the number of times of repetition depends on described down link coverage enhancement grade.In this way, subscriber equipment can with suitable number of repetition paging receiving message, and this both ensure that the successful reception of beep-page message, it also avoid excess waste Radio Resource
A second aspect of the present invention provides a kind of method for calling optimization in base station of the subscriber equipment at the machine type communication for paging coverage enhancement, described method is corresponding with the method for a first aspect of the present invention and comprise the following steps: a. receives the wireless resource control connection request from described subscriber equipment, the down link coverage enhancement grade that described wireless resource control connection request comprises described subscriber equipment and the reason set up wireless heterogeneous networks and be connected; B. the mark of the community at described subscriber equipment place is determined; C. generate initial user equipment message, described initial user equipment message comprises the mark of the mark of determined described community, received described down link coverage enhancement grade and described subscriber equipment; And described initial user equipment message is sent to mobile management entity by d..
By said method, except the mark of the down link obtained from subscriber equipment coverage enhancement grade and subscriber equipment being increased to except traditional initial user equipment message, also the mark of the community at subscriber equipment place is increased to initial user equipment message.Thus in paging afterwards, base station only can send beep-page message to the community at subscriber equipment place, and this saves the Radio Resource for repeating transmitting paging message further.
Preferably, in the base station according to the subscriber equipment at the machine type communication for paging coverage enhancement of the present invention in the method for calling optimization, described method is further comprising the steps of: e. judges that described whether set up the reason that wireless heterogeneous networks connects be the described down link coverage enhancement grade of report; And f. is when the described reason setting up wireless heterogeneous networks connection is the described down link coverage enhancement grade of report, and the message that refusal wireless heterogeneous networks connects is sent to described subscriber equipment.In this way, the wireless heterogeneous networks that can terminate as soon as possible for reporting down link coverage enhancement grade connects.
Further preferably, in the base station according to the subscriber equipment at the machine type communication for paging coverage enhancement of the present invention in the method for calling optimization, described method is further comprising the steps of: g. receives the second beep-page message from described mobile management entity, and described second beep-page message comprises the mark of described down link coverage enhancement grade and described community; And h. repeatedly sends the first beep-page message to described community, the number of times of repetition depends on described down link coverage enhancement grade.In this way, on the one hand, base station only can send beep-page message based on the mark of described community in the community at subscriber equipment place; On the other hand, base station can carry out transmitting paging message based on down link coverage enhancement grade with suitable number of repetition.
A third aspect of the present invention provides a kind of method for calling optimization in mobile management entity of the subscriber equipment at the machine type communication for paging coverage enhancement, described method is corresponding with the method for a second aspect of the present invention and comprise the following steps: I. receives the initial user equipment message of the base station be subordinate to from described subscriber equipment, and described initial user equipment message comprises down link coverage enhancement grade, the mark of community at described subscriber equipment place and the mark of described subscriber equipment; And II. corresponds to the mark that the mark of described subscriber equipment stores described down link coverage enhancement grade and described community.
By said method, the mark of the community at the down link coverage enhancement grade of received subscriber equipment and place can store by mobile management entity with being associated to the mark of subscriber equipment.In addition, the base station information had in traditional initial user equipment message also can also be associated with the mark of subscriber equipment.Thus when needs paging, mobile management entity can know base station corresponding to the target UE of paging, community and down link coverage enhancement grade.
Preferably, in the mobile management entity according to the subscriber equipment at the machine type communication for paging coverage enhancement of the present invention in the method for calling optimization, described method is further comprising the steps of: III. sends the second beep-page message to the base station that described subscriber equipment is subordinate to, and described second beep-page message comprises the mark of described down link coverage enhancement grade and described community.In this way, the mark of the down link coverage enhancement grade of subscriber equipment and community, place only can be sent to the base station that subscriber equipment is subordinate to by mobile management entity.
A fourth aspect of the present invention provide a kind of in the subscriber equipment of the machine type communication of coverage enhancement the device for calling optimization, described device comprises: the first determination module, and it is for determining the described down link coverage enhancement grade of described subscriber equipment; First sending module, it sends wireless resource control connection request for the base station that is subordinate to described subscriber equipment, the down link coverage enhancement grade that described wireless resource control connection request comprises described subscriber equipment and the reason set up wireless heterogeneous networks and be connected.
A fifth aspect of the present invention provides the device for calling optimization in a kind of base station of subscriber equipment of the machine type communication at paging coverage enhancement, described device comprises: the first receiver module, it is for receiving the wireless resource control connection request from described subscriber equipment, the down link coverage enhancement grade that described wireless resource control connection request comprises described subscriber equipment and the reason set up wireless heterogeneous networks and be connected; Second determination module, it is for determining the mark of the community at described subscriber equipment place; Initial user equipment message generating module, it is for generating initial user equipment message, and described initial user equipment message comprises the mark of the mark of determined described community, received described down link coverage enhancement grade and subscriber equipment; Second sending module, it is for being sent to mobile management entity by described initial user equipment message.
A sixth aspect of the present invention provides the device for calling optimization in a kind of mobile management entity of subscriber equipment of the machine type communication at paging coverage enhancement, described device comprises: the second receiver module, it is for receiving the initial user equipment message of the base station be subordinate to from described subscriber equipment, and described initial user equipment message comprises down link coverage enhancement grade, the mark of community at described subscriber equipment place and the mark of described subscriber equipment; Memory module, it stores the mark of described down link coverage enhancement grade and described community for the mark corresponding to described subscriber equipment.
According to the present invention, on the one hand, make all communities that mobile management entity need not be sent to all base stations in tracing area to the beep-page message of the subscriber equipment of the machine type communication of coverage enhancement and be sent to further in tracing area, but the base station be only subordinate to via target UE is sent to the community at target UE place, thus reduce the consumption of transfer resource; On the other hand, beep-page message can be sent with suitable number of repetition, This further reduces the consumption of transfer resource.
Accompanying drawing explanation
Fig. 1 show before the optimization of the subscriber equipment of the machine type communication to coverage enhancement with optimize after paging way;
Fig. 2 shows the flow chart of the method for the subscriber equipment optimization paging for the machine type communication for coverage enhancement;
Fig. 3 shows the flow chart of the method for accessing Random Access Channel in subscriber equipment inside according to one embodiment of the present invention;
Fig. 4 shows the schematic diagram of the boundary dropping to lower down link coverage enhancement grade according to the skew of one embodiment of the present invention from higher down link coverage enhancement grade;
Fig. 5 shows the method flow diagram of the change of the continuous several times determination down link coverage enhancement grade according to one embodiment of the present invention;
Fig. 6 shows the flow chart of the paging method after according to optimization of the present invention; And
Fig. 7 shows the device schematic diagram of the subscriber equipment optimization paging for the machine type communication for coverage enhancement.
Embodiment
Fig. 2 shows the flow chart of the method for the subscriber equipment optimization paging for the machine type communication for coverage enhancement.
In step s 201, its down link coverage enhancement grade determined by the subscriber equipment of the machine type communication of coverage enhancement.This down link coverage enhancement grade exemplarily can be determined by the periodic measurement of RSRP (ReferenceSignalReceivingPower: Reference Signal Received Power).
In step S202, send wireless resource control connection request by subscriber equipment to the base station that it is subordinate to.On the basis of traditional wireless resource control connection request, invention increases the down link coverage enhancement grade of subscriber equipment and a kind of reason setting up wireless heterogeneous networks connection newly.Table 1 gives the description of this new wireless resource control connection request field, wherein shows with underscore the element that the present invention increases newly.Particularly, add one and new set up reason (establishmentCause), i.e. " ce-LevelIndicate ", it is for the coverage enhancement grade of the base station repeats subscriber equipment to such as eNB; Also add new information element (IE) " dlCELevel " in addition, it is used to indicate down link coverage enhancement grade.Exemplarily, three down link coverage enhancement grade L1, L2 and L3 can be had.Wherein, L1 is defined as minimum down link coverage enhancement grade, and iterative transfer times required under this grade is minimum, and L3 is defined as the highest down link coverage enhancement grade, and iterative transfer times required under this grade is maximum.Certainly, the present invention is not restricted to this, and down link coverage enhancement grade also can be other dividing mode.
The description of the wireless resource control connection request field that table 1 is new
In step S203, the base station that subscriber equipment is subordinate to receives the wireless resource control connection request from this subscriber equipment, this wireless resource control connection request is such as shown in table 1, it has " dlCELevel " for indicating downlink link coverage enhancement grade, but, set up the reason of wireless heterogeneous networks connection not necessarily " ce-LevelIndicate ", it also can be the reason set up wireless heterogeneous networks and connect well known in the prior art, such as common transfer of data.
In step S204, the mark of the community at subscriber equipment place is determined in this base station.
In step S205, this base station generates initial user equipment message, and this initial user equipment message is a kind of S1AP message.At this, the information element be associated with coverage enhancement is the mark of the mark of the community at subscriber equipment place, down link coverage enhancement grade and subscriber equipment.Table 2 shows this new initial user equipment message, wherein show with underscore the information element that the present invention increases newly, particularly, it is used to indicate down link coverage enhancement grade, and when not needing to carry out coverage enhancement to subscriber equipment, this information element is not present in initial user equipment message.Such as, when subscriber equipment is switched to general mode from coverage enhancement pattern, be reported to mobile management entity with then omitting this information element, so, mobile management entity is known this subscriber equipment and is switched to general mode, and common page-mode is used for this subscriber equipment, and no longer carries out repeated paging.In addition, for coverage enhancement uses two information elements be included in traditional initial user equipment message, wherein, " E-UTRANCGI " is defined as identifying a community globally, that it comprises subscriber equipment place or connect cell identity information, will to be stored in mobile management entity after it and be used for helping base station only calling user device place or the community that connects; And " S-TMSI " is defined as the unique identification of subscriber equipment in mobile management entity, it is for distinguishing the subscriber equipment in mobile management entity, to store the information relevant with coverage enhancement explicitly to the mark of this subscriber equipment.
The initial user equipment message that table 2 is new
Out of Memory element in new initial user equipment message is consistent with definition of the prior art, and wherein, eNBUES1AP mark represents UE unique identification in the enb; NAS-PDU represents the protocol Data Unit of Non-Access Stratum; TAI represents the unique identification of tracing area; CSGId represents the mark of closed user group (ClosedSubscriberGroup); GUMMEI represents the globally unique identifier of MME; GW transport layer address is an IP address.
One according to the present invention preferred embodiment in, corresponding to the reason " ce-LevelIndicate " in wireless heterogeneous networks connection, also new cause value can be added for the information element " RRC sets up reason " of new initial user equipment message, i.e. " coverage enhancement mark ", its be used to indicate current initial user equipment message be for mobile management entity report about the information of the descending coverage enhancement of subscriber equipment.
In step S206, this initial user equipment message is sent to mobile management entity by this base station.
In step S207, mobile management entity receives the initial user equipment message of the base station be subordinate to from subscriber equipment, and this initial user equipment message is as shown in table 2.
In step S208, mobile management entity corresponds to the mark storage down link coverage enhancement grade of subscriber equipment and the mark of community, place.Such as, mobile management entity finds that initial user equipment message comprises the descending coverage enhancement grade of information element, so " S-TMSI " corresponded in initial user equipment message stores the mark " E-UTRANCGI " of this down link coverage enhancement grade and community, place.
One according to the present invention preferred embodiment in, mobile management entity also can be that " coverage enhancement mark " stores mark " E-UTRANCGI " of down link coverage enhancement grade and community, place with corresponding to " S-TMSI " according to " RRC sets up reason " in initial user equipment message.
By the method shown in Fig. 2, the present invention adds the information relevant to coverage enhancement respectively in traditional wireless resource control connection request with the initial user equipment message in S1AP, to make the mark that finally additionally can store down link coverage enhancement grade and community, subscriber equipment place in mobile management entity.Thus, the base station that mobile management entity can be subordinate to subscriber equipment in paging sends this two information, only to carry out paging in the mark of community, subscriber equipment place, carry out paging with the suitable number of repetition corresponding to down link coverage enhancement grade, reduce the resource consumption for paging.
One according to the present invention preferred embodiment in, before step S201, subscriber equipment can determine down link coverage enhancement grade when meeting and setting up condition that wireless heterogeneous networks connects, such as when the powering on of subscriber equipment, when subscriber equipment reselects the community that will access and when changing in subscriber equipment determination down link coverage enhancement grade.In addition, connect to successfully set up wireless heterogeneous networks, subscriber equipment can also have to base station transmission random access guiding and the step from this base station receiving random access response.
One according to the present invention preferred embodiment in, step S201 can be included in the multiple steps for accessing Random Access Channel of subscriber equipment inside.
Particularly, as shown in Figure 3, in step S301, the Access Layer of subscriber equipment obtains down link coverage enhancement grade.Such as, can cell reselection be performed at Access Layer or measure to find the down link coverage enhancement grade after changing.
In step s 302, this down link coverage enhancement grade is informed to Non-Access Stratum by the Access Layer of subscriber equipment.
In step S303, the Non-Access Stratum of subscriber equipment generates wireless resource control connection request, such as, this wireless resource control connection request comprise down link coverage enhancement grade and have in traditional wireless resource control connection request set up the reason and the mark of subscriber equipment that wireless heterogeneous networks connects, this reason setting up that wireless heterogeneous networks connects can be the report down link coverage enhancement grade that the present invention increases newly.
Preferably, after step S303, access wireless access channel at the Access Layer of subscriber equipment by known message 3, particularly, the Access Layer of subscriber equipment uses wireless resource control connection request to carry out the information about coverage enhancement upgraded to base station repeats.
One according to the present invention preferred embodiment in, subscriber equipment determination down link coverage enhancement grade changes and comprises: drop to lower down link coverage enhancement grade from higher down link coverage enhancement grade, wherein, the boundary dropping to this lower down link coverage enhancement grade from this higher down link coverage enhancement grade is first threshold; Compared with Second Threshold, this first threshold moves predetermined side-play amount on the direction of the down link coverage enhancement grade lower towards this, and this Second Threshold is the boundary being increased to this higher down link coverage enhancement grade from this lower down link coverage enhancement grade.
Fig. 4 shows this skew drops to the boundary of lower down link coverage enhancement grade schematic diagram from higher down link coverage enhancement grade.As shown in Figure 4, exemplarily the additional coverage of 15dB is divided into three down link coverage enhancement grades, down link coverage enhancement higher grade expression signal to noise ratio is lower, namely needs the number of times repeating transmission more.Such as, when subscriber equipment detects that signal to noise ratio drops under 5dB on Second Threshold 5dB, then determine that down link coverage enhancement grade changes.But, only have when subscriber equipment detects that signal to noise ratio rises on 7dB under exemplary first threshold 7dB, can determine that down link coverage enhancement grade changes.That is, first threshold has moved down certain side-play amount relative to Second Threshold towards lower down link coverage enhancement grade.Concrete application scenarios has been depended in the determination of this side-play amount.Such as the subscriber equipment that importance is higher, side-play amount can be increased, for the successful reception ensureing paging; And for the lower subscriber equipment of importance, side-play amount can be reduced, for the consumption reducing Radio Resource.In addition, because down link coverage enhancement higher grade, also poorer to the certainty of measurement of down link coverage enhancement grade, thus lower side-play amount should be adopted in for the saltus step from down link coverage enhancement grade 2 to down link coverage enhancement grade 1, such as compared to the Second Threshold 10dB between down link coverage enhancement grade 2 and down link coverage enhancement grade 1, the side-play amount of first threshold is only exemplary 1dB.It is pointed out that the first threshold of present embodiment defined and the numerical value of Second Threshold are only exemplary, it can not limit the present invention.In this way, the impact that the lower accuracy measured due to such as RSRP is brought can be reduced, ensure the successful reception of beep-page message.
In another preferred embodiment according to the present invention, subscriber equipment determination down link coverage enhancement grade changes and comprises: the change of the described down link coverage enhancement grade that continuous several times is determined is all consistent.
Fig. 5 shows the method flow diagram of the change of this continuous several times determination down link coverage enhancement grade.
As shown in Figure 5, in step S501, arranging count value n is 1.
In step S502, perform RSRP and measure.Certainly, the present invention also comprises any known method can measuring down link coverage enhancement grade.
In step S503, judge whether down link coverage enhancement grade changes, if not change, then return step S501.
If judge that in step S503 down link coverage enhancement grade changes, then continue to judge whether count value n equals the numerical value of N preset in step S504.Wherein N can exemplarily determine according to the importance of subscriber equipment, when subscriber equipment outbalance, then N is arranged larger, to guarantee the correct judgement to down link coverage enhancement grade; Otherwise, then N is arranged less, to accelerate the judgement of down link coverage enhancement grade.
In step S504, if n is not equal to N, then return step S502 after n being added 1 in step S506.
In step S504, if n equals N, then in step S505, determine that down link coverage enhancement grade there occurs change.
In another preferred embodiment according to the present invention, base station judges whether the reason setting up wireless heterogeneous networks connection is report down link coverage enhancement grade, and in a case of yes the message that refusal wireless heterogeneous networks connects is sent to subscriber equipment.Subscriber equipment can after sending Radio Resource Control request this refuse information of wait-receiving mode.
Fig. 6 shows the flow chart of the paging method after according to optimization of the present invention.
In step s 601, mobile management entity sends the second beep-page message to the base station that subscriber equipment is subordinate to, and on the basis of traditional S1AP beep-page message, the present invention adds the mark of down link coverage enhancement grade and community, subscriber equipment place wherein.Table 3 gives this new S1AP beep-page message.Wherein show with underscore the information element that the present invention increases newly, particularly, information element " down link coverage enhancement grade " is used to indicate the down link coverage enhancement grade of subscriber equipment, and information element " E-UTRANCGI " is used to indicate the community that target UE is positioned at.Wherein, mobile management entity can obtain this two information elements by the information associated by query aim customer equipment identification.
In step S602, base station receives the second beep-page message from mobile management entity, and analysis draws the down link coverage enhancement grade of target UE and the mark of community, place.
Therefore, in step S603, base station can to send the first beep-page message according to the determined iterative transfer times of down link coverage enhancement grade to this community.
In step s 604, subscriber equipment correspondingly repeatedly receives the first beep-page message from described base station.
The S1AP beep-page message that table 3 is new
Fig. 7 shows the device schematic diagram of the subscriber equipment optimization paging for the machine type communication for coverage enhancement.Fig. 7 be included in the subscriber equipment of the machine type communication of coverage enhancement for the device 701 of calling optimization, in the base station of the subscriber equipment of the machine type communication of paging coverage enhancement for the device 702 of calling optimization and in the mobile management entity of the subscriber equipment of the machine type communication of paging coverage enhancement for the device 703 of calling optimization.
As shown in Figure 7, device 701 comprises the first determination module 704 further, and it is for determining the down link coverage enhancement grade of subscriber equipment; First sending module 705, it sends wireless resource control connection request for the base station that is subordinate to subscriber equipment, the down link coverage enhancement grade that this wireless resource control connection request comprises subscriber equipment and the reason set up wireless heterogeneous networks and be connected.
Device 702 comprises the first receiver module 706 further, it is for receiving the wireless resource control connection request from the first sending module 705 in subscriber equipment, the down link coverage enhancement grade that this wireless resource control connection request comprises subscriber equipment and the reason set up wireless heterogeneous networks and be connected; Second determination module 707, it is for determining the mark of the community at subscriber equipment place; Initial user equipment message generating module 708, it is for generating initial user equipment message, and this initial user equipment message comprises the mark of the mark of determined community, received down link coverage enhancement grade and subscriber equipment; And second sending module 709, it is for being sent to mobile management entity by initial user equipment message.
Device 703 comprises the second receiver module 710 further, it is for receiving the initial user equipment message of the second sending module 709 in the base station that is subordinate to from subscriber equipment, and this initial user equipment message comprises down link coverage enhancement grade, the mark of community at subscriber equipment place and the mark of subscriber equipment; Memory module 711, it stores the mark of down link coverage enhancement grade and community for the mark corresponding to subscriber equipment.
Although the foregoing describe the specific embodiment of the present invention, those skilled in the art can make various changes and modifications within the scope of the appended claims.
Claims (15)
1. the method for calling optimization in the subscriber equipment of the machine type communication of coverage enhancement, said method comprising the steps of:
A. the described down link coverage enhancement grade of described subscriber equipment is determined; And
B. wireless resource control connection request is sent to base station that described subscriber equipment is subordinate to, the described down link coverage enhancement grade that described wireless resource control connection request comprises described subscriber equipment and the reason set up wireless heterogeneous networks and be connected.
2. method according to claim 1, is characterized in that, described steps A comprises:
-when meeting the condition setting up wireless heterogeneous networks connection, determine the described down link coverage enhancement grade of described subscriber equipment.
3. method according to claim 1, is characterized in that, described steps A comprises following sub-step further:
A1. described down link coverage enhancement grade is obtained at Access Layer;
A2. at described Access Layer, described down link coverage enhancement grade is informed to Non-Access Stratum; And
A3. described wireless resource control connection request is generated at described Non-Access Stratum.
4. method according to claim 2, is characterized in that, the described condition setting up wireless heterogeneous networks connection comprises:
Powering on of-described subscriber equipment; Or
-described subscriber equipment reselects the community that will access; Or
-described subscriber equipment determines that described down link coverage enhancement grade changes.
5. method according to claim 4, is characterized in that, described subscriber equipment is determined that described down link coverage enhancement grade changes and comprised:
-drop to lower down link coverage enhancement grade from higher down link coverage enhancement grade, wherein, the boundary of down link coverage enhancement grade lower described in dropping to from described higher down link coverage enhancement grade is first threshold; Compared with Second Threshold, described first threshold moves predetermined side-play amount on the direction towards described lower down link coverage enhancement grade, and described Second Threshold is the boundary of down link coverage enhancement grade higher described in being increased to from described lower down link coverage enhancement grade; And/or
The change of the described down link coverage enhancement grade that-described subscriber equipment continuous several times is determined is all consistent.
6. method according to claim 1, is characterized in that, when the described reason setting up wireless heterogeneous networks connection is the described down link coverage enhancement grade of report, described method is further comprising the steps of:
D. the message that the refusal wireless heterogeneous networks from described base station connects is received.
7. method according to claim 1, is characterized in that, described method is further comprising the steps of:
E. repeatedly receive the first beep-page message from described base station, the number of times of repetition depends on described down link coverage enhancement grade.
8. the method for calling optimization in the base station of the subscriber equipment of the machine type communication for paging coverage enhancement, said method comprising the steps of:
A. the wireless resource control connection request from described subscriber equipment is received, the down link coverage enhancement grade that described wireless resource control connection request comprises described subscriber equipment and the reason set up wireless heterogeneous networks and be connected;
B. the mark of the community at described subscriber equipment place is determined;
C. generate initial user equipment message, described initial user equipment message comprises the mark of the mark of determined described community, received described down link coverage enhancement grade and described subscriber equipment; And
D. described initial user equipment message is sent to mobile management entity.
9. method according to claim 8, is characterized in that, described method is further comprising the steps of:
E. judge whether the described reason setting up wireless heterogeneous networks connection is the described down link coverage enhancement grade of report; And
F., when the described reason setting up wireless heterogeneous networks connection is the described coverage enhancement grade of report, the message that refusal wireless heterogeneous networks connects is sent to described subscriber equipment.
10. method according to claim 8 or claim 9, it is characterized in that, described method is further comprising the steps of:
G. receive the second beep-page message from described mobile management entity, described second beep-page message comprises the mark of described down link coverage enhancement grade and described community; And
H. repeatedly send the first beep-page message to described community, the number of times of repetition depends on described down link coverage enhancement grade.
11. 1 kinds of methods for calling optimization in the mobile management entity of the subscriber equipment of the machine type communication for paging coverage enhancement, said method comprising the steps of:
I. receive the initial user equipment message of the base station be subordinate to from described subscriber equipment, described initial user equipment message comprises down link coverage enhancement grade, the mark of community at described subscriber equipment place and the mark of described subscriber equipment; And
II. the mark corresponding to described subscriber equipment stores the mark of described down link coverage enhancement grade and described community.
12. methods according to claim 11, is characterized in that, described method is further comprising the steps of:
III. the base station be subordinate to described subscriber equipment sends the second beep-page message, and described second beep-page message comprises the mark of described down link coverage enhancement grade and described community.
13. 1 kinds in the subscriber equipment of the machine type communication of coverage enhancement for the device of calling optimization, described device comprises:
First determination module, it is for determining the described down link coverage enhancement grade of described subscriber equipment;
First sending module, it sends wireless resource control connection request for the base station that is subordinate to described subscriber equipment, the down link coverage enhancement grade that described wireless resource control connection request comprises described subscriber equipment and the reason set up wireless heterogeneous networks and be connected.
14. 1 kinds in the base station of the subscriber equipment of the machine type communication of paging coverage enhancement for the device of calling optimization, described device comprises:
First receiver module, it is for receiving the wireless resource control connection request from described subscriber equipment, the down link coverage enhancement grade that described wireless resource control connection request comprises described subscriber equipment and the reason set up wireless heterogeneous networks and be connected;
Second determination module, it is for determining the mark of the community at described subscriber equipment place;
Initial user equipment message generating module, it is for generating initial user equipment message, and described initial user equipment message comprises the mark of the mark of determined described community, received described down link coverage enhancement grade and subscriber equipment;
Second sending module, it is for being sent to mobile management entity by described initial user equipment message.
15. 1 kinds in the mobile management entity of the subscriber equipment of the machine type communication of paging coverage enhancement for the device of calling optimization, described device comprises:
Second receiver module, it is for receiving the initial user equipment message of the base station be subordinate to from described subscriber equipment, and described initial user equipment message comprises down link coverage enhancement grade, the mark of community at described subscriber equipment place and the mark of described subscriber equipment;
Memory module, it stores the mark of described down link coverage enhancement grade and described community for the mark corresponding to described subscriber equipment.
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