CN101765085A - Method and device for processing failure to deliver downlink NAS message - Google Patents
Method and device for processing failure to deliver downlink NAS message Download PDFInfo
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- CN101765085A CN101765085A CN200810186487A CN200810186487A CN101765085A CN 101765085 A CN101765085 A CN 101765085A CN 200810186487 A CN200810186487 A CN 200810186487A CN 200810186487 A CN200810186487 A CN 200810186487A CN 101765085 A CN101765085 A CN 101765085A
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Abstract
The invention discloses a method and a device for processing the failure to deliver a downlink NAS (non-access stratum) message. The method comprises the following steps: processing an access-stratum message containing NAS PDUs (protocol data unit) at an E-UTRAN (evolved-universal terrestrial radio access network) Node B, and if part or all of NAS PDUs in the access-stratum message are not delivered to UE (user equipment), creating an NAS PDU list by the E-UTRAN Node B according to the information of all the NAS PDUs that are not delivered to the UE, and combining the NAS PDU list into a 'message indicating that the NAS message is not delivered'; sending the 'message indicating that the NAS message is not delivered' to an MME (mobility management entity) by the E-UTRAN Node B; and getting informed of all the non-delivered NAS PDUs and carrying out the subsequent processing after receiving the 'message indicating that the NAS message is not delivered' by the MME. The invention ensures that the MME can get informed of the NAS PDUs in the downlink NAS message, which are not delivered to the UE, by the 'message indicating that the NAS message is not delivered' and reduces the system expenditure incurred by the message.
Description
Technical field
The present invention relates to field of wireless communication, more particularly, relate to a kind of processing method and device that can't transmit descending NAS (Non-Access-Stratum, Non-Access Stratum) message.
Background technology
At LTE (Long Term Evolution, Long Term Evolution) in the system, UE (User Equipment, subscriber equipment) and MME (Mobility Management Entity, Mobility Management Entity) transmission method of NAS message between is divided into two kinds of situations of uplink and downlink, and descending NAS message is also referred to as descending direct-sending message, wherein, descending NAS message (NAS PDU (protocol Data Unit)) has two kinds of transmission meanss:
A kind of is at the S1 interface by DOWNLINK NAS TRANSPORT message, at Uu (air interface) mouthful, by DL Information Transfer transparent pass to UE; Owing to only comprise a NAS PDU in the DOWNLINKNAS TRANSPORT message, when undelivered UE, eNB also only returns a NAS NON DELIVERY INDICATION (NAS message is not sent to indication) message to MME, so this technical scheme does not need its processing of special concern;
Another kind is the mode of carrying by message, by with other message combinations (such as initial context set up request message, business is set up request message or business modification request message) issue eNB (E-UTRAN NodeB at the S1 interface, the Node B of evolution), pass through RRC (Radio ResourceControl at the Uu interface, radio resource control) reconfiguration message is carried and is sent to UE, NAS message is transparent to eNB, and eNB does not change any content in the NAS message.The annexation of UE, eNB, MME, as shown in Figure 1.Interface between UE and the eNB is the Uu mouth; Interface between eNB and the MME is the S1 interface.UE and eNB, and the message that sends between eNB and the MME all needs through ASN.1 coding, the message of receiving also all needs the ASN.1 decoding.The statement of this paper subsequent process needs the place of the encoding and decoding of ASN.1 to explain no longer in addition.
Owing to reasons such as failure in the eNB or switchings, descending NAS message can can't be sent to UE.Need eNB the NAS message of not sending to UE this moment, informs MME by NAS NON DELIVERYINDICATION (NAS message is not sent to indication) message.MME does further processing according to the NAS message of undelivered.
Owing to can only comprise a NAS message in the NAS NON DELIVERY INDICATION message, just can only send a NAS undelivered at every turn and indicate to MME, when MME need set up or revise a plurality of business, can carry a plurality of NAS message and issue UE.At this moment, if eNB can't send to UE to NAS message, just need a plurality of NAS NON DELIVERY INDICATION message of group to give MME.This causes professional a foundation or modification message, has triggered a lot of bar NASNON DELIVERY INDICATION message at the S1 interface, causes that many unnecessary spending are arranged in the system, and even more serious is that how many bar NAS message MME does not know to have do not send to actually.
Such as, MME sets up message by business will set up 4 business, MME has received the response of professional foundation failure, 1 professional success, 3 service fails, in this case, if MME receives a NAS NON DELIVERY INDICATION message, the inside is one of them professional NAS message, and whether so follow-up also have other professional NAS NON DELIVERY INDICATION message, and MME can't know for sure.Because the existence of the inner various failure scenarios of eNB, in some cases, eNB has returned the failure of Access Layer to MME, and NAS message has passed to UE's; Also in some cases, eNB has returned the failure of Access Layer to MME, and NAS message is all not deliver to UE's.
Need to wait for how many bar NAS NON DELIVERYINDICATION message so MME can't know, thereby cause the NAS layer of MME can't correctly handle NAS NON DELIVERYINDICATION message.This has directly caused the state of NAS layer of the NAS layer of UE and MME inconsistent.
Summary of the invention
Technical problem solved by the invention has been to provide a kind of processing method and device that can't transmit descending non-access layer information, can reduce the expense that the system that is notified to brings time MME by NAS NON DELIVERY INDICATION message informing to be implemented in the NAS PDU that guarantees undelivered UE in the descending NAS message.
In order to realize the problems referred to above, the invention provides a kind of processing method that can't transmit descending non access stratum NAS message, this method comprises:
Node B in evolution is handled the access layer information that comprises NAS protocol Data Unit PDU, NAS PDU in the access layer information has and does not partly or entirely send to subscriber equipment as described, then the Node B of described evolution is made into NAS PDU tabulation with the information sets of the NAS PDU of all undelivered subscriber equipmenies, then this NAS PDU tabulation is organized in one " NAS message is not sent to Indication message ";
The Node B of described evolution should " NAS message is not sent to Indication message " send to Mobility Management Entity MME; After described MME receives this " NAS message is not sent to Indication message ", know the NAS PDU of all undelivered UE and do subsequent treatment.
Method of the present invention, wherein, the access layer information of the described NAS of comprising PDU is that initial context is set up request message, business is set up request message or business modification request message.
Further, wherein, comprise an array in the described NAS PDU tabulation, each element of this array comprises length and the content information of the NAS PDU of a undelivered UE.
Further, wherein,
In the described NAS PDU tabulation, before described array, also comprise an information unit, this information unit comprises the number information of the NAS PDU of all undelivered UE.
Further, wherein,
After the Access Layer of described MME is received this " NAS message is not sent to Indication message ", the tabulation of the NAS PDU in this message is delivered to the NAS layer of described MME and handled.
Further, wherein,
When there was not the NAS PDU of undelivered UE in the Node B of described evolution in as access layer information as described in determining, then the Node B of described evolution finished the processing procedure of NAS PDU, does not send " NAS message is not sent to Indication message " to MME.
In order to realize the problems referred to above, the present invention also provides a kind of processing unit that can't transmit descending non access stratum NAS message, be applied in the Node B of the evolution in the system that Node B and Mobility Management Entity MME by subscriber equipment, evolution form, this device is made up of processing module in the Node B of evolution and S1 interface message result treatment module, wherein
Described processing module, be used to handle the access layer information that comprises NAS PDU that sends by described MME, as the NAS PDU in the access layer information has and does not partly or entirely send to subscriber equipment as described in determining, and then the information sets of the NAS PDU of all undelivered subscriber equipmenies is made into NAS PDU tabulation and sends to described S1 interface message result treatment module;
Described S1 interface message result treatment module, be used to receive the NAS PDU tabulation that described processing module sends, this NAS PDU tabulation is organized in one " NAS message is not sent to Indication message ", and should " NAS message is not sent to Indication message " sends to MME.
Device of the present invention, wherein,
Described processing module is made up of " S1 interface message processing sub " and " Uu mouth message reason processing sub ", wherein,
Described " S1 interface message processing sub ", be used to handle the access layer information that comprises NAS PDU that sends by described MME, as the NAS PDU in the access layer information has and does not partly or entirely send to subscriber equipment as described in determining, and then the information sets of the NAS PDU of all undelivered subscriber equipmenies is made into NAS PDU tabulation and sends to described S1 interface message result treatment module;
Described " Uu mouth message reason processing sub ", be used for handling the described access layer information after the processing of sending by described " S1 interface message processing sub ", as the NASPDU in the access layer information has and does not partly or entirely send to subscriber equipment as described in determining, and then the information sets of the NAS PDU of all undelivered subscriber equipmenies is made into NAS PDU tabulation and sends to described S1 interface message result treatment module.
Further, wherein,
The access layer information of handling in the described processing module that comprises NAS PDU is that initial context is set up request message, business is set up request message or business modification request message;
Comprise an array in the described NAS PDU tabulation that described processing module is made into the information sets of the NAS PDU of all undelivered subscriber equipmenies, each element of this array comprises length and the content information of the NAS PDU of a undelivered UE.
Further, wherein,
In the described NAS PDU tabulation that described processing module is made into the information sets of the NAS PDU of all undelivered subscriber equipmenies, before described array, also comprise an information unit, this information unit comprises the number information of the NAS PDU of all undelivered UE.
Compared with prior art, the present invention both can pass through NAS NON DELIVERY INDICATION message informing to MME by the NAS PDU of undelivered UE in guaranteeing descending NAS message, reduce the expense that the system that is notified to brings simultaneously, can allow MME correctly handle NAS NONDELIVERY INDICATION message again.
Description of drawings
Fig. 1 is the interface relationship schematic diagram of UE, ENB and MME;
Concrete treatment step flow chart when Fig. 2 can't transmit descending NAS message for the embodiment of the invention;
Fig. 3 is to be signaling message treatment system structure chart between the UE/eNB/NME that uses behind the described processing unit that can't transmit descending NAS message of the embodiment of the invention (device is applied among the eNB 312).
Embodiment
Because in the LTE system, descending direct-sending message can't be sent under the situation of Ue, under the situation that multi-service is set up and revised, for example: when eNB when processing comprises the access layer information of NAS PDU, the failure of eNB inter-process, switch or send reasons such as failure, the access layer information that causes comprising NAS PDU can't pass to UE, need handle notice MME to the NAS PDU of undelivered UE, then eNB can send many NAS NONDELIVERY INDICATION message to MME according to the number of the NAS PDU of undelivered UE, both caused signaling consumption too much in the system, more can cause MME can't correctly handle the problem of NAS NON DELIVERY INDICATION message, and then cause the inconsistent problem of NAS layer state between UE and the MME.
According to the problems referred to above, roughly thought of the present invention is: by the NAS PDU information unit (IE) in the change NAS NON DELIVERYINDICATION message is NAS PDU LIST (tabulation) IE, and use a NAS NON DELIVERY INDICATION message, the NAS message of all undelivered UE in the Access Layer process is returned to MME.
As shown in Figure 2, i.e. the described processing method of the embodiment of the invention comprises:
Wherein, NAS PDU tabulation can be organized as follows: use an information unit (IE) to represent the number (optional) of the NAS PDU of undelivered UE, be an array behind this IE, each element in the array comprises length and the content of the NAS PDU of a undelivered UE; Also can use other method for organizing, not do qualification here.
Shown in accompanying drawing 2, embodiment is described in detail, but not as a limitation of the invention.
Embodiment one, set up request message with eNB at the processing initial context, and set up in the process at initial context, eNB handles failure and is example, supposing that this initial context is set up comprises a NAS PDU in the request message, length is 5 bytes, and this NAS PDU does not send to UE, eNB need handle notice MME to the NAS PDU that the initial context of undelivered UE is set up in the request message, and concrete steps are:
Embodiment two, set up request message with eNB managing business, and set up in the process in business, professional all failures that eNB handles are example, suppose that this business is set up and to set up 3 business in the process, each business has all been carried a NAS PDU, numbering is respectively A, B, C, the length of NAS PDU is respectively 6,7,8 bytes, amount to 3 NAS PDU, 3 NAS PDU do not send to UE, and eNB need handle notice MME to the NAS PDU that the business of undelivered UE is set up in the request message, and concrete steps are:
Embodiment three, with eNB in the modify request messages of managing business, and in the business modification process, partial service successfully is an example in the business that eNB handles, suppose in this business modification process and will revise 3 business, each business has all been carried a NAS PDU, numbering is respectively A, B, C, the length of NAS PDU is respectively 6,7,8 bytes, amount to 3 NAS PDU, wherein have 2 NAS PDU all not send to UE, eNB need handle notice MME to the NAS PDU in the business modification request message of undelivered UE, and concrete steps are:
Step 201 in eNB business modification process, supposes that eNB handles interior business and admits the NAS PDU corresponding service that is numbered A to admit successfully, and the NAS PDU corresponding service that is numbered B and C is admitted failure;
Embodiment four, with eNB in the modify request messages of managing business, and in the business modification process, the business modification that eNB handles is all failed, and is example (promptly having 0 NAS PDU not send to UE) but all NAS PDU have issued UE, suppose in this business modification process and will revise 3 business, each business has all been carried a NAS PDU, and numbering is respectively A, B, C, and the length of NAS PDU is respectively 6,7,8 bytes, amount to 3 NAS PDU, concrete steps are:
MME does not receive NAS NON DELIVERY INDICATION message, then thinks the NAS PDU that does not have undelivered UE in this business modification request message.
As shown in Figure 3, be signaling message treatment system structure chart between the UE 311/eNB 312/MME 313 that uses behind the described processing unit that can't transmit of the embodiment of the invention (device is applied among the eNB 312) to descending NAS message.The described device of the embodiment of the invention is made up of processing module 301 among the eNB 312 of existing system and S1 interface message result treatment module 302, wherein, processing module 301 is made up of " S1 interface message processing sub " among the eNB 312 and " Uu mouth message reason processing sub ".
At first, with use carry out after system behind the device of the present invention under normal circumstances is triggered to the NAS layer message among the MME 313 be treated to example (solid arrow as shown in Figure 3), idiographic flow is:
" the MME NAS message processing module " of MME 313 sends to MME 313 " MME access layer information processing module " to NAS message, and " the MME access layer information processing module " of MME 313 is put into " the S1 interface message processing sub " of issuing eNB 312 in the access layer information to NAS message in the mode of NAS PDU IE;
" the S1 interface message processing sub " of eNB 312 is through handling, send to eNB 312 " Uu mouth Message Processing submodule ", " Uu mouth Message Processing submodule " sends to this access layer information " the UE access layer information processing module " of UE 311 after treatment;
" the Uu mouth message result treatment module " of eNB 312 feeds back to results messages " the S1 interface message result treatment module 302 " of eNB 312, " the S1 interface message result treatment module 302 " of eNB 312 sends to results messages " the MME access layer information processing module " of MME 313, " the MME access layer information processing module " of MME313 offered NAS Message Processing result " the MMENAS message processing module " of MME 313 through handling.
Secondly, the access layer information that contains NASPDU that processing module 301 normal process MME in the eNB of system send, if reasons such as failure are failed, switch or sent to eNB 312 inter-process, the access layer information that causes comprising NAS PDU can't pass to UE 311, need handle notice MME 313 to the NAS PDU of undelivered UE311; At this moment, processing module 301 in the device of the embodiment of the invention (being the processing module 301 among the eNB) is used for partly or entirely not sending to UE when the NAS PDU that determine access layer information has, and then the information sets of the NAS PDU (having one or more) of all undelivered UE is made into NAS PDU tabulation and sends to S1 interface message result treatment module 302;
Wherein, processing module 301 is made up of " S1 interface message processing sub " among the eNB and " Uu mouth message reason processing sub ", " S1 interface message processing sub " handling the access layer information that contains NASPDU that is sent by MME, if eNB 312 inter-process are failed or are switched, NAS PDU in determining access layer information has and does not partly or entirely send to UE 311, then the information sets of the NAS PDU (having one or more) of all undelivered UE 311 is made into NAS PDU tabulation and sends to S1 interface message result treatment module 302 (dotted arrow part as shown in Figure 3);
" Uu mouth message reason processing sub " access layer information that contains NAS PDU after handling the processing that sends by " S1 interface message processing sub ", if eNB 312 sends failure, NAS PDU in determining access layer information has and does not partly or entirely send to UE 311, then the information sets of the NAS PDU (having one or more) of all undelivered UE 311 is made into NAS PDU tabulation and sends to S1 interface message result treatment module 302 (dotted arrow part as shown in Figure 3);
Wherein, the access layer information of handling in the processing module 301 that comprises NAS PDU is that initial context is set up request message, business is set up request message or business modification request message;
Wherein, NAS PDU tabulation can be organized as follows: use an information unit (IE) to represent the number (optional) of the NAS PDU of undelivered UE, be an array behind this IE, each element in the array comprises length and the content of the NAS PDU of a undelivered UE; Also can use other method for organizing, not do qualification here;
Wherein, the NAS PDU of processing module 301 in determining access layer information do not exist when not sending to UE, then do not need to organize NAS PDU tabulation to send to S1 interface message result treatment module 302.
" S1 interface processing messages result treatment module 302 " among the eNB sends to results messages " the MME access layer information processing module " of MME under normal condition, also be used for the NAS PDU tabulation that processing module 301 (" S1 interface message processing sub " or " Uu mouth message reason processing sub ") sends is organized into a NAS NON DELIVERY INDICATION message, and this NAS NONDELIVERY INDICATION message is sent to MME.
Because the tabulation of the NAS PDU in this message comprises the information of the NAS PDU of all undelivered UE in this process NAS message, MME can be easy to carry out respective handling.
Adopt system's formation complete UE 311, eNB 312 and the Access Layer between the MME 313 and the Message Processing flow process of NAS layer of the described device of the embodiment of the invention, also solved simultaneously owing to the failure of eNB312 inter-process, switched or send reason such as failure, the access layer information that causes comprising NAS PDU can't pass to UE 311, need handle the problem of notice MME 313 to the NAS PDU of undelivered UE 311.
The present invention compared with prior art, when a plurality of professional foundation and modification, handle failure at eNB, and NAS PDU does not send under the situation of UE, can reduce the number of S1 interface NAS NON DELIVERYINDICATION message, reduce signaling consumption in the system, NAS layer can correctly handle that allows MME to the NAS message of undelivered UE.Strengthened the consistency of state of the NAS layer of UE and MME.And then strengthened the reliability of LTE system.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. the processing method that can't transmit descending non access stratum NAS message, this method comprises:
Node B in evolution is handled the access layer information that comprises NAS protocol Data Unit PDU, NAS PDU in the access layer information has and does not partly or entirely send to subscriber equipment as described, then the Node B of described evolution is made into NAS PDU tabulation with the information sets of the NAS PDU of all undelivered subscriber equipmenies, then this NAS PDU tabulation is organized in one " NAS message is not sent to Indication message ";
The Node B of described evolution should " NAS message is not sent to Indication message " send to Mobility Management Entity MME; After described MME receives this " NAS message is not sent to Indication message ", know the NAS PDU of all undelivered UE and do subsequent treatment.
2. the method for claim 1 is characterized in that:
The access layer information of the described NAS of comprising PDU is that initial context is set up request message, business is set up request message or business modification request message.
3. method as claimed in claim 1 or 2 is characterized in that:
Comprise an array in the described NAS PDU tabulation, each element of this array comprises length and the content information of the NAS PDU of a undelivered UE.
4. method as claimed in claim 3 is characterized in that:
In the described NAS PDU tabulation, before described array, also comprise an information unit, this information unit comprises the number information of the NAS PDU of all undelivered UE.
6. the method for claim 1 is characterized in that:
After the Access Layer of described MME is received this " NAS message is not sent to Indication message ", the tabulation of the NAS PDU in this message is delivered to the NAS layer of described MME and handled.
7. the method for claim 1 is characterized in that:
When there was not the NAS PDU of undelivered UE in the Node B of described evolution in as access layer information as described in determining, then the Node B of described evolution finished the processing procedure of NAS PDU, does not send " NAS message is not sent to Indication message " to MME.
8. processing unit that can't transmit to descending non access stratum NAS message, be applied in the Node B of the evolution in the system that Node B and Mobility Management Entity MME by subscriber equipment, evolution form, this device is made up of processing module in the Node B of evolution and S1 interface message result treatment module, wherein
Described processing module, be used to handle the access layer information that comprises NAS PDU that sends by described MME, as the NAS PDU in the access layer information has and does not partly or entirely send to subscriber equipment as described in determining, and then the information sets of the NAS PDU of all undelivered subscriber equipmenies is made into NAS PDU tabulation and sends to described S1 interface message result treatment module;
Described S1 interface message result treatment module, be used to receive the NAS PDU tabulation that described processing module sends, this NAS PDU tabulation is organized in one " NAS message is not sent to Indication message ", and should " NAS message is not sent to Indication message " sends to MME.
9. device as claimed in claim 8 is characterized in that:
Described processing module is made up of " S1 interface message processing sub " and " Uu mouth message reason processing sub ", wherein,
Described " S1 interface message processing sub ", be used to handle the access layer information that comprises NAS PDU that sends by described MME, as the NAS PDU in the access layer information has and does not partly or entirely send to subscriber equipment as described in determining, and then the information sets of the NAS PDU of all undelivered subscriber equipmenies is made into NAS PDU tabulation and sends to described S1 interface message result treatment module;
Described " Uu mouth message reason processing sub ", be used for handling the described access layer information after the processing of sending by described " S1 interface message processing sub ", as the NASPDU in the access layer information has and does not partly or entirely send to subscriber equipment as described in determining, and then the information sets of the NAS PDU of all undelivered subscriber equipmenies is made into NAS PDU tabulation and sends to described S1 interface message result treatment module.
10. device as claimed in claim 8 is characterized in that:
The access layer information of handling in the described processing module that comprises NAS PDU is that initial context is set up request message, business is set up request message or business modification request message;
Comprise an array in the described NAS PDU tabulation that described processing module is made into the information sets of the NAS PDU of all undelivered subscriber equipmenies, each element of this array comprises length and the content information of the NAS PDU of a undelivered UE.
11. device as claimed in claim 10 is characterized in that:
In the described NAS PDU tabulation that described processing module is made into the information sets of the NAS PDU of all undelivered subscriber equipmenies, before described array, also comprise an information unit, this information unit comprises the number information of the NAS PDU of all undelivered UE.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102651902A (en) * | 2012-04-13 | 2012-08-29 | 大唐移动通信设备有限公司 | Method, eNB (evolved Node B) and MME (Mobility Management Entity) equipment for handling NAS (Non-Access Stratum) instruction transmission failure |
CN104303590A (en) * | 2013-04-12 | 2015-01-21 | 华为技术有限公司 | Method and device for across-system interoperation |
WO2019158097A1 (en) * | 2018-02-14 | 2019-08-22 | Mediatek Inc. | Method and apparatus for non-access stratum transport |
CN112188608A (en) * | 2019-07-04 | 2021-01-05 | 华为技术有限公司 | Method, device, system and chip for synchronizing PDU session state |
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2008
- 2008-12-23 CN CN200810186487A patent/CN101765085A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102651902A (en) * | 2012-04-13 | 2012-08-29 | 大唐移动通信设备有限公司 | Method, eNB (evolved Node B) and MME (Mobility Management Entity) equipment for handling NAS (Non-Access Stratum) instruction transmission failure |
CN104303590A (en) * | 2013-04-12 | 2015-01-21 | 华为技术有限公司 | Method and device for across-system interoperation |
WO2019158097A1 (en) * | 2018-02-14 | 2019-08-22 | Mediatek Inc. | Method and apparatus for non-access stratum transport |
CN110393038A (en) * | 2018-02-14 | 2019-10-29 | 联发科技股份有限公司 | Method and apparatus for Non-Access Stratum transmission |
TWI694702B (en) * | 2018-02-14 | 2020-05-21 | 聯發科技股份有限公司 | Method, user equipment and computer readable mediumfor communication with core network |
US10863390B2 (en) | 2018-02-14 | 2020-12-08 | Mediatek Inc. | Method and apparatus for non-access stratum transport |
CN112188608A (en) * | 2019-07-04 | 2021-01-05 | 华为技术有限公司 | Method, device, system and chip for synchronizing PDU session state |
CN112188608B (en) * | 2019-07-04 | 2022-01-14 | 华为技术有限公司 | Method, device, system and chip for synchronizing PDU session state |
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EP3309985B1 (en) | Transmission method and user equipment |
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Application publication date: 20100630 |