CN101409896A - Method for dynamically obligating resource for emergency call - Google Patents
Method for dynamically obligating resource for emergency call Download PDFInfo
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- CN101409896A CN101409896A CNA200710123796XA CN200710123796A CN101409896A CN 101409896 A CN101409896 A CN 101409896A CN A200710123796X A CNA200710123796X A CN A200710123796XA CN 200710123796 A CN200710123796 A CN 200710123796A CN 101409896 A CN101409896 A CN 101409896A
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Abstract
The invention discloses a method for reserving resource for an urgent call dynamically. The method is used for a TD-SCDMA system. The method comprises the steps as follows: a reserved resource information list is initialized, wherein, a symbol, time slot and code channel information of reservation resource are recorded; when an ordinary business is accessed, the time slot and a code channel are selected for reserved resource of ordinary business access and urgent call access respectively, and the symbol of the current reserved resource and code channel information of each time slot are recorded; when the urgent call is accessed, an information list is inquired, whether vacant reserved resource exists is judged according the symbol, if the vacant reserved resource exists, the time slot and the code channel corresponding to the reserved resource are accessed, and the symbol of occupied and reserved resource is set as being used; otherwise, the urgent call is accessed with business, and the time slot and the code channel are selected within a subdistrict. When the urgent call is accessed, the urgent call can be accessed into a system fast, thereby ensuring the instantaneity for accessing the urgent call, reducing the condition that the urgent call is refused due to the full load of the system and presenting the QoS requirement of different business grades.
Description
Technical field
The present invention relates to TD-SCDMA (Time-Division Synchronization CodeDivision-Multiple-Access, TD SDMA) method of system's reserved resource, in particular, be the method for the dynamic reserved resource of urgent call in a kind of TD-SCDMA system.
Background technology
In the TD-SCDMA system, when new business inserts, need be the suitable time slot of each traffic assignments to be accessed, channelization code resource (being code channel).During for the service selection time slot, not only need to satisfy professional resource requirement, light, the less time slot of interference of also should as far as possible selecting to load has more excellent transmission performance to guarantee system.When being the traffic assignments channelization code resource, as shown in Figure 5, in the tree structure of ovsf code, after certain code word is assigned with, will block to fall all low speed spreading codes on its subtree and its high speed spreading code to the root path, therefore need adopt the optimized distribution strategy to the distribution of channelization code resource, avoid because sign indicating number the unreasonable of resource allocation causes a plurality of high speed spreading codes to get clogged as far as possible, thereby cause power system capacity to reduce.
And the TD-SCDMA system can provide professional transmission such as voice with different QoS performance, data, video, and different service attributes have the priority order of different brackets.Urgent call is a kind of particular service with high priority, needs system to provide and inserts passage fast.If when emergency call request inserts, be in the system at full capacity, promptly there are not remaining time slot, code channel resource can distribute to the user, the access failure that then can cause urgent call, even system adopts the measure of load down at this moment, discharge a part of resource allocation and give this business, also can increase the time delay that urgent call inserts.
Therefore, when non-emergency call (being general service) inserts, need reserve enough resources, so that insert for urgent call provides fast for urgent call.General service is the process of urgent call reserved resource when inserting, and needs not only to guarantee that current general service can select more excellent time slot and code channel resource, should guarantee that reserved resource also can select more excellent time slot and code channel simultaneously.
But prior art can not address the above problem, and therefore, need improve prior art.
Summary of the invention
The object of the present invention is to provide a kind of for the method for the dynamic reserved resource of urgent call, be used for the TD-SCDMA system, when non-emergency call (being general service) inserts, can reserve enough resources for urgent call, so that insert for urgent call provides fast.Be the process of urgent call reserved resource when general service inserts, can guarantee that not only current general service can select more excellent time slot and code channel resource, also can guarantee that reserved resource also can select more excellent time slot and code channel simultaneously.
Technical scheme of the present invention is as follows:
A kind ofly be the method for the dynamic reserved resource of urgent call, be used for the TD-SCDMA system, the method comprising the steps of:
The reserved resource information table of A1, a certain sub-district of initialization; Wherein, described information table writes down and is required to be urgent call reserved resource number in this sub-district, and the sign of reserved resource, time slot and code channel information;
When A2, general service access, be respectively the reserved resource that general service inserts, urgent call inserts, select time slot and code channel, and safeguard described information table, write down the sign of current reserved resource and the code channel information of each time slot;
When A3, urgent call access, carry out following steps:
A31, inquiring about described information table, judge whether to have idle reserved resource according to described sign, is execution in step A32 then, otherwise execution in step A33;
A32, insert corresponding time slot of described reserved resource and code channel, and the described sign of the described reserved resource that will take is changed to and uses;
A33, for the urgent call access service, in this sub-district, select time slot and code channel.
Described method, wherein, steps A 33 specifically may further comprise the steps: the idling-resource number in the calculation plot; Judge whether the idling-resource number in the sub-district is not less than the demand number of resources of access service; Be then to be this service selection time slot and code channel; Otherwise, return the distribution failure.
Described method wherein, also comprises steps A 4: when urgent call discharges, upgrade described information table, the described sign of the described reserved resource that discharges is changed to the free time.
Described method, wherein, steps A 2 specifically may further comprise the steps:
A21, adopt and be required to be urgent call reserved resource number in this sub-district altogether, deduct occupied reserved resource number in the described information table, also needing in this sub-district to obtain the reserved resource number;
A22, judge whether the difference that also needs the reserved resource number in idling-resource number in this sub-district and this sub-district is not less than the resource requirement number of current business, be execution in step A23 then, otherwise return the distribution failed message;
A23, be that described general service inserts and selects time slot and code channel;
A24, the reserved resource that inserts for urgent call are selected time slot and code channel;
A25, safeguard described information table, write down sign, time slot and the code channel information of current reserved resource.
Described method, wherein, described selection time slot and code channel specifically may further comprise the steps:
B1, select arbitrary time slot, add up the idling-resource number of this time slot;
B2, judging whether the idling-resource number is not less than the demand number of resources of access service, is execution in step B5 then; Otherwise execution in step B3;
B3, the demand number of resources is deducted current time slots the idling-resource number as new demand number of resources, and the idle code channel in the current time slots distributed to access service;
B4, select another time slot, calculate the idling-resource number of this time slot, execution in step B2;
B5, select idle code channel.
Described method, wherein, step B1 specifically may further comprise the steps: select to disturb minimum time slot, add up the idling-resource number on this time slot; And step B4 specifically comprises: select to disturb the time slot that takes second place, add up the idling-resource number on this time slot.
Described method, wherein, described time slot and code channel information in the steps A 1, each time slot number in order code channel wherein respectively; And step B5 specifically comprises: select idle code channel by the code channel serial number.
Described method, wherein, step B5 specifically may further comprise the steps: judging whether to distribute the ascending resource of described access service, is then to select the Dan Zhike in the current ascending time slot to distribute code channel; Otherwise press the idle code channel of code channel selective sequential; Wherein, to distribute code channel be occupied but itself the unappropriated code channel of its fraternal code channel for described Dan Zhike.
Described method, wherein, the Dan Zhike in the current ascending time slot of described selection distributes code channel, is to select the Dan Zhike of spreading factor maximum available in this time slot to distribute code channel to distribute to the user.
Adopt such scheme, the present invention dynamically reserves suitable time-slot code channel resource for urgent call by when the general service access procedure, and the information of record reserved resource; When urgent call inserts, directly search reserved resource, just connecting system apace, thus can insert for urgent call provide fast.Guarantee that not only current general service can select more excellent time slot and code channel resource, guarantee that also reserved resource also can select more excellent time slot and code channel.Like this, with regard to the situation that refusal is admitted in the urgent call that has guaranteed the real-time of urgent call access effectively, reduced to cause at full capacity owing to system, embodied the QoS demand of different business grade.
Description of drawings
Fig. 1 is the dynamic resource reservation method overview flow chart of one embodiment of the present invention;
Fig. 2 is the operational flowchart of the urgent call of one embodiment of the present invention when inserting;
Fig. 3 is the operational flowchart of the general service of one embodiment of the present invention when inserting;
Fig. 4 is the selection time slot of one embodiment of the present invention and the operational flowchart of channelization code resource;
Fig. 5 is the orthogonal variable spread-spectrum factor code tree structural representation of prior art.
Embodiment
Below preferred embodiment of the present invention is described in detail.
As shown in Figure 1, the invention provides a kind of method of the dynamic reserved resource of urgent call that is, be used for the TD-SCDMA system, this method may further comprise the steps:
The reserved resource information table of A1, a certain sub-district of initialization; Wherein, described information table writes down and is required to be urgent call reserved resource number in this sub-district, and the sign of reserved resource, time slot and code channel information; For example, described information table is an array that length is K, K represents to be required to be in a certain sub-district urgent call reserved resource number, each array element is structure (struct) type, sign, time slot and the code channel information (being the distributed intelligence of time slot code channel) of record reserved resource, its form is shown in following table one.
Table one: reserved resource information table
| SeqID | UseFlag | Slot1 | Slot2 | Slot3 | Slot4 | Slot5 | Slot6 |
| 1 | 0 | C8 | C1 | C10 | |||
| 2 | 1 | C21 | C19 | C2，C8 | |||
| ... | |||||||
| K | 0 | C12 | C11 | C12 |
Wherein, SeqID represents the sequence number of reserved resource because the reserved resource of total K urgent call in the sub-district, so the value of SeqID is 1～K, each line item in the table reserved resource information of a urgent call.
UseFlag is this reserved resource service marking, for example, is provided with 0 and represents the free time, and 1 representative is used.Each time slot is corresponding Slot1～Slot6 respectively, wherein, and the sign indicating number Taoist monastic name of the information that each row of Slot1～Slot6 are filled out in corresponding time slot, being reserved.The numbering principle of sign indicating number Taoist monastic name can adopt: with each ascending time slot each channel code sequence arrangement from SF=1 to SF=16, be designated as C1～C31 successively, the code channel of descending time slot SF=1 is designated as C0, and the channel code sequence arrangement of SF=16 is designated as C1～C16 successively.
Judge that then access service is general service or urgent call, when general service inserts, execution in step A2, when urgent call inserts, execution in step A3.
When A2, general service access, be respectively the reserved resource that general service inserts, urgent call inserts, select time slot and code channel, and safeguard described information table, write down the sign of current reserved resource and the code channel information of each time slot; Because reserved resource is according to the distribution situation dynamic assignment of the load level of each time slot and current idle code channel, so need be after each service access, upgrade in time and safeguard a reserved resource information table, write down the time slot and the code channel information at current reserved resource place.
When A3, urgent call insert, as shown in Figure 2, carrying out following steps: A31, inquire about described information table, judge whether to have idle reserved resource according to described sign, is execution in step A32 then, otherwise execution in step A33; A32, insert corresponding time slot of described reserved resource and code channel, and the described sign of the described reserved resource that will take is changed to and uses; A33, for the urgent call access service, in this sub-district, select time slot and code channel.
For example, UseFlag=0 is set represents the free time, when the UseFlag=1 representative had been used, execution in step A31 inquired about the resource whether described information table has UseFlag=0, was to show that then this resource is idle, can use.Execution in step A32 then, time slot, code channel information according to the reserved resource record of free time directly insert corresponding time-slot code channel, and the UseFlag of shared reserved resource are changed to 1.If reserved resources all in the reserved resource information table is all occupied, then execution in step A33 selects suitable time slot and code channel resource again in the sub-district.
Wherein, steps A 33 specifically can may further comprise the steps: the idling-resource in the first calculation plot is counted R; Judge that idling-resource in the sub-district counts R whether more than or equal to the demand number of resources S of access service; Be then to select time slot and code channel for the urgent call access service; Otherwise return the distribution failure.
And method of the present invention can also comprise steps A 4: when urgent call discharges, upgrade described information table, the described sign of the described reserved resource that discharges is changed to the free time.Can avoid unnecessarily taking resource like this.
Specifically, as shown in Figure 3, steps A 2 specifically can may further comprise the steps:
A21, adopt and be required to be the urgent call reserved resource in this sub-district altogether and count K, deduct in the described information table occupied reserved resource and count N, also needing in this sub-district to obtain reserved resource to count K-N.
A22, judging the difference that also needs the reserved resource number in idling-resource number in this sub-district and this sub-district whether more than or equal to the resource requirement number of current business, is execution in step A23 then; Otherwise return the distribution failed message.
A23, be that described general service inserts and selects time slot and code channel.
A24, the reserved resource that inserts for urgent call are selected time slot and code channel.
A25, safeguard described information table then, write down sign, time slot and the code channel information of current reserved resource.
Above-mentioned selection time slot and code channel, come down to select suitable time slot and code channel for access service, need not only to guarantee that current general service can select more excellent time slot and code channel resource, should guarantee that reserved resource also can select more excellent time slot and code channel simultaneously.Specifically can may further comprise the steps: B1, select arbitrary time slot, add up the idling-resource of this time slot and count M; B2, judging that idling-resource counts M whether more than or equal to the demand number of resources S of access service, is execution in step B5 then; Otherwise execution in step B3; B3, the demand number of resources is deducted current time slots the idling-resource number as new demand number of resources, S=S-M promptly is set, and the idle code channel in the current time slots is distributed to access service; B4, select another time slot, calculate the idling-resource of this time slot and count M, execution in step B2; B5, select idle code channel.
Wherein, an execution mode is that step B1 specifically can may further comprise the steps: select to disturb minimum time slot, the idling-resource of adding up on this time slot is counted M; And step B4 specifically comprises: select to disturb the time slot that takes second place, the idling-resource of adding up on this time slot is counted M.Here optimized reserved resource in the distribution on the time slot: when selecting time slot, can respectively uplink and downlink timeslot be sorted according to the load or the interference level of current each time slot for reserved resource.Reserved resource is distributed in the time slot that load is lower, interference is less, after guaranteeing that urgent call inserts, system still has more excellent transmission performance as far as possible.
Wherein, another execution mode can be that described time slot and code channel information in the steps A 1, each time slot number in order code channel wherein respectively; And step B5 specifically comprises: select idle code channel by the code channel serial number.For example, step B5 specifically may further comprise the steps: press earlier the spreading factor order from small to large in the time slot, by the code word order of each code channel, each code channel is numbered.As shown in Table 1, the numbering of sign indicating number Taoist monastic name can be worked out in the following ways: with each ascending time slot each channel code sequence arrangement from SF=1 to SF=16, be designated as C1～C31 successively, the code channel of descending time slot SF=1 is designated as C0, the channel code sequence arrangement of SF=16 is designated as C1～C16 successively.
And for example, step B5 specifically may further comprise the steps: judging whether to distribute the ascending resource of described access service, is then to select the Dan Zhike in the current ascending time slot to distribute code channel; Otherwise press the idle code channel of code channel selective sequential; Wherein, to distribute code channel be occupied but itself the unappropriated code channel of its fraternal code channel for described Dan Zhike.
Specifically, the Dan Zhike in the current ascending time slot of described selection distributes code channel, preferentially selects the Dan Zhike of spreading factor maximum available in this time slot to distribute code channel to distribute to the user.For example, current up direction need distribute the code channel of a SF=16, and the Dan Zhike that at first chooses the SF=16 layer distributes code channel, when the SF=16 layer do not have Dan Zhike to distribute code channel the time, the Dan Zhike that then chooses the SF=8 layer distributes code channel, by that analogy.
Like this, just can choose suitable channel code for reserved resource.Specifically, when choosing channel code for reserved resource, up direction can begin choosing from the code channel of spreading factor maximum by the distribution of channel code, promptly at first search SF (Spresding Factor, spreading factor)=16 idle code channel preferentially selects the occupied code channel of its fraternal code channel (being that Dan Zhike distributes code channel) as preset code-channel, if the SF=16 layer does not have such code channel, the Dan Zhike that then upwards searches SF=8 distributes code channel, and the rest may be inferred.As shown in Figure 5, during the SF=8 layer, C
Ch, 8,2And C
Ch, 8,3Fraternal each other code channel is as code channel C
Ch, 8,2When occupied, preferentially select code channel C
Ch, 8,3This code channel selection mode can be avoided the obstruction that the high speed spreading code caused owing to take the low speed spreading code.Down direction is because can only to distribute spreading factor be 1 or 16 code channel, so choosing of channel code can get final product by sign indicating number Taoist monastic name selective sequential free time code channel.
Specifically, the execution mode of dynamic resource reservation method overall procedure of the present invention may further comprise the steps as shown in Figure 1.
Step 101: input sub-district domestic demand reserved resource is counted K.
Step 102: initialization reserved resource information table, this information table are an array that length is K, and each array element is the struct type, during initialization information such as UseFlag all is changed to 0.
Step 103: import the type of service of resource to be allocated and required number of resources S.
Step 104: judge the type of service of resource to be allocated, if urgent call, then execution in step 105; If general service, then execution in step 106.
Step 105: the operation when carrying out the urgent call access, detailed process are held the back explanation as shown in Figure 2.
Step 106: the operation when carrying out the general service access, detailed process are held the back explanation as shown in Figure 3.
Execution mode when urgent call of the present invention inserts may further comprise the steps as shown in Figure 2.
Step 201: taking of each reserved resource identifies UseFlag in the inquiry reserved resource information table.
Step 202: the result according to the previous step inquiry, judge the reserved resource that whether has UseFlag=0 in the reserved resource information table, if exist, then execution in step 203; Otherwise, execution in step 204.
Step 203: in the time-slot code channel that service access is reserved, and the UseFlag of this reserved resource is changed to 1.
Step 204: the residue idling-resource sum R in the calculation plot.
Step 205: judge whether the residue idling-resource sum R in the sub-district satisfies professional resource requirement S, if satisfy execution in step 206; Otherwise, execution in step 207.
Step 206: reselect suitable time slot and channelization code resource for this business, system of selection is the step 401 of face～405 as follows.
Step 207: return the distribution failure, refusing user's inserts.Specifically can not give unnecessary details at this by the prior art flow processing.
Execution mode when general service of the present invention inserts may further comprise the steps as shown in Figure 3.
Step 301: the current reserved resource number that needs in the calculation plot, establish that occupied reserved resource number is N in the reserved resource information table, and need reserved resource to add up to K in the sub-district altogether, then the current reserved resource number that also needs equals K-N in the sub-district.
Step 302: in the residue idling-resource sum in the calculation plot and the sub-district the current difference that also needs the reserved resource number whether more than or equal to the resource requirement of current business, if, execution in step 303; Otherwise, execution in step 304.
Step 303: be this service selection suitable time slot and channelization code resource, system of selection is the step 401 of face～405 as follows.
Step 304: return the result who distributes failure.
Step 305: select suitable time slot and channelization code resource for reserved resource, system of selection is the step 401 of face～405 as follows.
Step 306: time slot, the code channel information of reserved resource are recorded in the reserved resource information table.
The time slot that selection of the present invention is suitable and the execution mode of channelization code resource may further comprise the steps as shown in Figure 4.
Step 401: get/the minimum time slot of down direction interference, the residue idling-resource that calculates on this time slot is counted M.
Step 402: judge that whether the residue idling-resource in the time slot count M more than or equal to current resource requirement S, if, execution in step 405; Otherwise, execution in step 403～404.
Step 403: make S=S-M, and the idle code channel of the residue in the current time slots is distributed to the user.
Step 404: get/down direction disturbs the time slot take second place, and the surplus resources that calculates on this time slot is counted M, continues execution in step 402.
Step 405:, preferentially select the Dan Zhike that spreading factor is bigger in this time slot to distribute code channel to distribute to the user for up direction; Down direction is then distributed to the user by the idle code channel of code channel selective sequential.
The present invention dynamically reserves suitable sign indicating number resource for urgent call, and safeguards the reserved resource information table in the process that general service inserts, write down the time-slot code channel information of current reservation, when urgent call inserts, directly from table, read corresponding information, just connecting system apace.Like this, with regard to the situation that refusal is admitted in the urgent call that has guaranteed the real-time of urgent call access effectively, reduced to cause at full capacity owing to system, embodied the QoS demand of different business grade.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (9)
1, a kind ofly be the method for the dynamic reserved resource of urgent call, be used for the TD-SCDMA system, it is characterized in that the method comprising the steps of:
The reserved resource information table of A1, a certain sub-district of initialization; Wherein, described information table writes down and is required to be urgent call reserved resource number in this sub-district, and the sign of reserved resource, time slot and code channel information;
When A2, general service access, be respectively the reserved resource that general service inserts, urgent call inserts, select time slot and code channel, and safeguard described information table, write down the sign of current reserved resource and the code channel information of each time slot;
When A3, urgent call access, carry out following steps:
A31, inquiring about described information table, judge whether to have idle reserved resource according to described sign, is execution in step A32 then, otherwise execution in step A33;
A32, insert corresponding time slot of described reserved resource and code channel, and the described sign of the described reserved resource that will take is changed to and uses;
A33, for the urgent call access service, in this sub-district, select time slot and code channel.
2, method according to claim 1 is characterized in that, steps A 33 specifically may further comprise the steps: the idling-resource number in the calculation plot; Judge whether the idling-resource number in the sub-district is not less than the demand number of resources of access service; Be then to be this service selection time slot and code channel; Otherwise, return the distribution failure.
3, method according to claim 1 is characterized in that, also comprises steps A 4: when urgent call discharges, upgrade described information table, the described sign of the described reserved resource that discharges is changed to the free time.
4, method according to claim 1 is characterized in that, steps A 2 specifically may further comprise the steps:
A21, adopt and be required to be urgent call reserved resource number in this sub-district altogether, deduct occupied reserved resource number in the described information table, also needing in this sub-district to obtain the reserved resource number;
A22, judge whether the difference that also needs the reserved resource number in idling-resource number in this sub-district and this sub-district is not less than the resource requirement number of current business, be execution in step A23 then, otherwise return the distribution failed message;
A23, be that described general service inserts and selects time slot and code channel;
A24, the reserved resource that inserts for urgent call are selected time slot and code channel;
A25, safeguard described information table, write down sign, time slot and the code channel information of current reserved resource.
According to the arbitrary described method of claim 1 to 4, it is characterized in that 5, described selection time slot and code channel specifically may further comprise the steps:
B1, select arbitrary time slot, add up the idling-resource number of this time slot;
B2, judging whether the idling-resource number is not less than the demand number of resources of access service, is execution in step B5 then; Otherwise execution in step B3;
B3, the demand number of resources is deducted current time slots the idling-resource number as new demand number of resources, and the idle code channel in the current time slots distributed to access service;
B4, select another time slot, calculate the idling-resource number of this time slot, execution in step B2;
B5, select idle code channel.
6, method according to claim 5 is characterized in that, step B1 specifically may further comprise the steps: select to disturb minimum time slot, add up the idling-resource number on this time slot; And step B4 specifically comprises: select to disturb the time slot that takes second place, add up the idling-resource number on this time slot.
7, method according to claim 5 is characterized in that, described time slot and code channel information in the steps A 1, each time slot number in order code channel wherein respectively; And step B5 specifically comprises: select idle code channel by the code channel serial number.
8, method according to claim 7 is characterized in that, step B5 specifically may further comprise the steps: judging whether to distribute the ascending resource of described access service, is then to select the Dan Zhike in the current ascending time slot to distribute code channel; Otherwise press the idle code channel of code channel selective sequential; Wherein, to distribute code channel be occupied but itself the unappropriated code channel of its fraternal code channel for described Dan Zhike.
9, method according to claim 8 is characterized in that, the Dan Zhike in the current ascending time slot of described selection distributes code channel, is to select the Dan Zhike of spreading factor maximum available in this time slot to distribute code channel to distribute to the user.
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| US9391862B2 (en) | 2011-06-15 | 2016-07-12 | Huawei Technologies Co., Ltd. | Method and apparatus for scheduling a service processing resource |
| CN108432275A (en) * | 2015-12-23 | 2018-08-21 | 华为技术有限公司 | A kind of downlink urgency traffic transmission method, base station, user equipment and system |
| CN108432275B (en) * | 2015-12-23 | 2020-12-08 | 华为技术有限公司 | Downlink emergency service transmission method, base station, user equipment and system |
| CN107454631A (en) * | 2016-05-31 | 2017-12-08 | 宇龙计算机通信科技(深圳)有限公司 | A kind of network resource scheduling method and the network equipment, system |
| WO2020062611A1 (en) * | 2018-09-30 | 2020-04-02 | 海能达通信股份有限公司 | Emergency call receiving method, device, system and electronic equipment |
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