CN101018351A - Method for transferring the short data with the competitive channel - Google Patents
Method for transferring the short data with the competitive channel Download PDFInfo
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- CN101018351A CN101018351A CNA2006100074123A CN200610007412A CN101018351A CN 101018351 A CN101018351 A CN 101018351A CN A2006100074123 A CNA2006100074123 A CN A2006100074123A CN 200610007412 A CN200610007412 A CN 200610007412A CN 101018351 A CN101018351 A CN 101018351A
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Abstract
The provided short data transmission method applying channel competition comprises: on idle state, the terminal transmits short data to the wireless access network through the competition channel; the latter receives and checks data to validate data correction and return response. This invention overcomes defects in current 3G system and improves transmission efficiency.
Description
Technical field
The present invention relates to accidental access method, relate in particular to a kind of method of utilizing competitive channel to carry out the short data transmission.
Background technology
In wireless communication system, the multiple business type is arranged, wherein a class uplink service is to send the very short data of length, such as sending note.In current network, short data service has accounted for sizable ratio.Along with communication service is constantly expanded, various dissimilar short data such as web page browsing order, file download command, household remote order also will constantly occur.Therefore improve the efficient that wireless network sends short data, the bearing capacity that improves cordless communication network is had very big benefit.
In gsm system, the short data that terminal sends mainly is a note, terminal at first enters connection status by idle condition, with set up dedicated wireless link between network and be connected, and set up transmission channel and be connected with SMS in the core net, again note is sent to SMS, note discharges link after sending and finishing again, returns idle condition.
And in the 3G system, have dual mode to send short data, i.e. DCH mode and FACH mode substantially.The course of work of DCH mode and FACH mode is as follows:
As shown in Figure 1a, terminal in the 3G system generally is in idle condition, when terminal need send short data, at first according to the information in the Cell Broadcast CB, use common signal channel RACH to initiate the RRC connection request, set up signaling when wireless access network returns the RRC connection by FACH to terminal, after the RRC connection was set up successfully, terminal can enter DCH mode or FACH mode by entering CELL_DCH state or CELL_FACH state.
If wireless access network makes terminal enter the DCH mode, then set up process by RB between terminal and the wireless access network, set up dedicated transmission channel DCH, reach physical channel synchronously after, connect, consult authentication, encrypt matters by direct-sending message and core net again, then short data is sent on DCH.After data send and finish, the process that discharges resource, tears chain open, then, terminal is got back to idle condition (or other connection status).
Shown in Fig. 1 b, if wireless access network makes terminal enter the FACH mode, do not set up dedicated channel between terminal and the wireless access network, use common signal channel.Connect with core net, matters such as negotiation authentication, encryption are monitored the FACH channel after setting up and finishing continuously, go up the transmission direct-sending message at competitive channel (RACH) again and carry out the short data transmission.After being sent completely, still needing to be trapped in CELL FACH state and continue to monitor the FACH channel, or the process that discharges resource, tears chain open, get back to idle condition (or other connection status).
Some shortcomings are arranged when according to foregoing description as can be seen, terminal sends short data in the current 3G system:
If in the 3G system, send short data by the DCH mode, need between terminal and network by wave point repeatedly carry out resource negotiation, any process such as the affirmation of shaking hands, it is long and to take resource many to take the Radio Resource time.Between wireless access network and core net, carry out in the foundation, reciprocal process of transmission link, dedicated wireless link takies always and the free time is not used, the time that takies Radio Resource is that the several times, ten that send the short data time are taught doubly even tens of times, so utilization ratio of wireless resources is not high.
If in the 3G system, send short data by the FACH mode, the FACH mode does not take dedicated channel resource, and use common signal channel (RACH/FACH) resource to carry out alternately, when not using common signal channel, this common signal channel still can be used by other user, and therefore the Radio Resource that uses reduces greatly.But be to use that this kind mode need carry out still that RRC connect to set up, CM service request and affirmation, note sends and confirm, tear open process such as chain, said process all needs to take Radio Resource, the time that takies Radio Resource is still several times even ten several times that send the short data time, so utilization ratio of wireless resources is still very low.
In the LTE project, owing to there is not the CELL_FACH state, terminal send short data method will with current 3G system in similar with the DCH mode, wireless resource utility efficiency is not high when therefore sending short data, thereby is necessary to design a kind of method of efficient transmission short data.
Summary of the invention
At the low defective of wireless resource utility efficiency in the prior art, the present invention proposes a kind of method of efficient transmission short data.
The method of utilizing competitive channel to carry out the short data transmission provided by the invention comprises:
A) terminal under idle condition sends short data by competitive channel to wireless access network;
B) after wireless access network receives the short data of competitive channel transmission, short data is carried out verification;
C) when according to check results, wireless access network confirms to receive correct short data, then sends confirmation to terminal.
According to method of carrying out the short data transmission provided by the present invention, the short data relevant information is sent to wireless access network by competitive channel with short data, and described short data relevant information comprises short data sign, destination address, authentication and encryption key or terminal iidentification.
According to method of carrying out the short data transmission provided by the present invention, when short data amount that the length of short data can be carried greater than competitive channel, short data is carried out segmentation, and comprise the branch segment identification at frame head, form a plurality of short data, be divided into repeatedly and send to wireless access network by competitive channel.
According to method of carrying out the short data transmission provided by the present invention, the related entities in the wireless access network carries out being transmitted to core net after the short data reorganization according to minute segment identification.
According to method of carrying out the short data transmission provided by the present invention, described competitive channel is RACH, UpPCH or UL_SCH.
According to method of carrying out the short data transmission provided by the present invention, when terminal does not receive the number of times that sends data by competitive channel from the affirmation information of wireless access network and terminal when being no more than maximum number of times of transmission in the given time, send short data to wireless access network once more, when the number of times that sends data by competitive channel when terminal surpasses maximum number of times of transmission, send failure.
According to method of carrying out short data transmission provided by the present invention, when terminal receives the confirmation information in the given time, then terminal is thought and is sent the short data success, and process finishes, and radio access layer is transmitted to short data the related entities of core net again.
According to method of carrying out the short data transmission provided by the present invention, the step that the data that wireless access network is sent competitive channel are handled comprises: judge by the sign of the data type in the short data relevant information whether the data type that receives is short data; Short data is carried out CRC check, judge whether the data that receive are correct.
According to method of carrying out the short data transmission provided by the present invention, when wireless access network and core net have connected; After wireless access network receives short data, the short data in the buffer is sent to the core net related entities.
When not connecting between wireless access network and the core net, by the entity stores short data in the wireless access network.In the buffer area as sporocarp short data is arranged, and the memory space of short data surpasses short data memory space threshold value, or the temporary time of short data is when surpassing short data threshold value memory time, then wireless access network is set up transmission channel with the related entities in the core net and is connected, and data are sent to core net.Core net mails to the destination according to the destination address of short data with described short data.
The present invention compared with prior art, can pass through competitive channel (as RACH) transmission short data owing to be in the user terminal of idle condition, if once send successfully, then only take competitive channel once with descending affirmation indicating channel (as FACH) once, and need not to take other Radio Resource.
If also not have between wireless access network and core net to set up relevant transmission channel, can be temporarily stored among the wireless access network, and need not wait for the transmission of carrying out short data after transmission channel foundation is finished again, the time that takies Radio Resource can reduce.The affirmation of the service negotiation between terminal high level and the core net high level, transmission short data etc., do not need on wave point, to carry out mutual repeatedly, but, carry out subsequently interworking by wireless access network and core net with the disposable wireless access network that mails to of all information.Thereby improved utilization ratio of wireless resources, also improved the capacity of Radio Access Network simultaneously.
Description of drawings
Fig. 1 a is that terminal uses common signal channel RACH/FACH to set up the process that RRC connects in the existing 3G system.
Fig. 1 b is the flow chart of typical note process of transmitting in the existing 3G system.
Fig. 2 a is a flow chart according to an embodiment of the invention.
Fig. 2 b is a flow chart in accordance with another embodiment of the present invention.
Fig. 2 c is the present invention carries out the embodiment of short data transmission as competitive channel with UpPCH and RACH a flow chart.
Fig. 2 d is the present invention carries out the embodiment of short data transmission as competitive channel with UL_SCH and RACH channel a flow chart.
Fig. 3 a is the network work flow process figure that builds transmission channel according to the embodiment of the invention after between wireless access network and the core net.
Fig. 3 b is the network work flow process figure that builds transmission channel according to the embodiment of the invention between wireless access network and core net earlier.
Fig. 4 represents according to the embodiment of the invention, the schematic diagram of competitive channel frame structure.
Embodiment
In the present invention, when terminal need send short data, directly make a call by competitive channel (as RACH, UpPCH or UL_SCH), simultaneously with the relevant information of short data, for example, terminal iidentification (sign of unique definite terminal), send destination address (as the IP address), authentication and the encryption key etc. of short data, with short data relevant information and short data together once (or being divided into several times) send to wireless access network.Wherein, described competitive channel is meant can the channel of a plurality of terminals to network terminal initiation connection request on this channel, for example, and RACH, UpPCH or UL_SCH.
Fig. 2 a is the flow chart according to the successful transmission short data process of the embodiment of the invention.As shown in the figure, terminal in the system (UE) (for example is in idle condition, be in the LTE_IDLE state), when terminal need send short data, logging in network at first, receive the information in the Cell Broadcast CB,, therefore can when terminal initial logging in network or registration, be kept at terminal and network terminal because information such as authentication information, enciphered message, terminal ability information are the network Given information.At this moment, terminal is in access state at random.
Terminal is sent short data by competitive channel (for example, RACH, UpPCH or UL_SCH).Preferably, the short data relevant information is sent to wireless access network by competitive channel with short data, described short data relevant information comprises short data sign, destination address, authentication and encryption key or terminal iidentification.Wherein said short data sign is used to represent that the data that sent are short data or other data (for example controlling signaling etc.), the address that destination address is represented the destination that this short data will be sent out (for example, Target IP), terminal iidentification is unique sign of determining this subscriber equipment, and authentication and encryption key are the signs that authenticates between terminal and the network.Described short data relevant information is present in the frame head of the short data information that terminal sends.Process of transmitting can be that short data and short data relevant information are once sent to wireless access network, also above-mentioned information can be sent to wireless access network several times.Wherein, when short data amount that the length of short data can be carried greater than competitive channel, short data is carried out segmentation, and comprise the branch segment identification at frame head, form a plurality of short data, be divided into then and repeatedly pass through competitive channel, described a plurality of short data are sent to wireless access network.
Then, the terminal affirmation information of monitoring wireless Access Network correlated channels continuously.To be wireless access network produce after receiving the short data information that terminal sends described confirmation.If wireless access network receives correct short data, then send confirmation.In addition, preferably,, then do not send confirmation signal if when wireless access network is thought this short data mistake after to the check of received short data.
In the present embodiment, wireless access network comprises the detection of short data: the data that receive are carried out short data inspection and verification.At first, after receiving the data of terminal by the competitive channel transmission, whether what these data were determined in the judgement of the short-and-medium Data Identification of frame head by data message is short data, according to described short data sign, after wireless access network confirms that the data that receive are short data, can carry out described short data is carried out verification, for example whether CRC check is correct to judge short data.If determine that by relevant checking algorithm this short data is correct, then send confirmation to terminal by correlated channels.
By the monitoring to correlated channels, if terminal is received confirmation, then terminal check sends the short data success, terminal reinstatement attitude when LTE_IDLE (for example normal DRX operating state).
After wireless access network sends confirmation, need carry out subsequent operation with core net.The short data that is about in the buffer directly sends to core net related entities (having set up under the situation of associated transport link); Or earlier temporary by related entities in the wireless access network, connect with core net again, after the service request, short data sent to the related entities of core net.Wherein, buffer memory and the corresponding control logic of the related entities of temporary short data by being arranged in wireless access network or core net realizes that preferably, this entity storage class is the data of short data.The relevant subsequent operation will be further described in the back.
Behind the short data that receives the wireless access network transmission, core net will mail to the destination with short data according to the destination address (for example purpose IP) of short data.
Fig. 2 b is the flow chart according to the transmission short data failure procedure of the embodiment of the invention.As shown in the figure, the terminal in the system is in idle condition, and when terminal need send short data, at first logging in network received the information in the Cell Broadcast CB, is kept at terminal and network terminal when terminal initial logging in network or registration.At this moment, terminal is in access state at random.
Terminal is sent short data by competitive channel (for example, RACH, UpPCH or UL_SCH).Preferably, the short data relevant information is sent to wireless access network by competitive channel with short data, described short data relevant information comprises short data sign, destination address, authentication and encryption key or terminal iidentification.Wherein, described short data sign is used to represent that the data that sent are short data or other data (for example controlling signaling etc.), the address that destination address is represented the destination that this short data will be sent out (for example, Target IP), terminal iidentification is unique sign of determining this subscriber equipment, and authentication and encryption key are the signs that authenticates between terminal and the network.The shortage data association message is present in the frame head of the short data information that terminal sends.
Then, the terminal affirmation information of monitoring wireless Access Network correlated channels continuously.To be wireless access network produce after receiving the short data information that terminal sends described confirmation.If wireless access network does not receive short data, then do not send confirmation.In addition, preferably,, do not send confirmation signal if when wireless access network is thought this short data mistake after to the check of received short data yet.
Wireless access network comprises the processing of short data: the data that receive are carried out short data inspection and verification.At first, after receiving the data of terminal by the competitive channel transmission, the judgement of the short-and-medium Data Identification of frame head by data message determines whether these data are short data, if wireless access network confirms that the data that receive are not short data, then wireless access network responds accordingly according to corresponding data type, for example, if these data are control signalings, then wireless access network is carried out corresponding network operation according to this signaling.If wireless access network can carry out described short data is carried out verification after confirming that the data that receive are short data, for example whether CRC check is correct to judge short data.If determine this short data mistake by relevant checking algorithm, then do not send confirmation to terminal.
By the monitoring to correlated channels, if in the given time, terminal does not receive confirmation, and then terminal is prepared described short data is sent once more, and before sending, record sends number of times, and makes comparisons with the maximum number of times of transmission of setting.The record of described transmission number of times can realize that maximum number of times of transmission then is stored in the memory of terminal equipment by the counter in the terminal.When the number of times that sends data by competitive channel when terminal was no more than maximum number of times of transmission, terminal can send short data to wireless access network once more.And the number of times that sends data by competitive channel when terminal sends failure when surpassing maximum number of times of transmission, and the terminal cancellation sends.
Fig. 2 c is the present invention carries out the embodiment of short data transmission as competitive channel with UpPCH and RACH a flow chart.As shown in the figure, in the communication standard of TD-SCDMA, UE at first picked at random uplink synchronous sequence sign indicating number launches at UpPCH, obtain the response of NodeB after, UE sends short data on the RACH channel.On UpPCH during emission uplink synchronous sequence sign indicating number, may occur that two UE launch simultaneously and the situation of competing; In addition,, and obtain identical response because two UE may choose identical uplink synchronous sequence sign indicating number simultaneously, emission and competing on RACH simultaneously, so UpPCH and RACH are competitive channels.
Fig. 2 d is the present invention carries out the embodiment of short data transmission as competitive channel with UL_SCH and RACH channel a flow chart.As shown in the figure, in 3GPP_LTE, UE at first launches random access code on Random Access Channel RACH, obtain the response of NodeB after, UE sends short data on the UL_SCH channel.The random access code of wherein launching on RACH only is with the short code sign, and be not with UE_ID, might choose the identical sign of access short code at random simultaneously by two UE this moment, make two UE obtain identical UL_SCH resource simultaneously, and in the frame head of UL_SCH, comprise UE_ID and carry out short data transmission, therefore, this moment, RACH, UL_SCH had the character of competitive channel equally.
Fig. 3 a is the network work flow process figure that sets up transmission channel according to the embodiment of the invention after between wireless access network and the core net.As shown in the figure, at first, set up short data Delivery Function (SDT) in wireless access network, buffer memory and the corresponding control logic of the related entities of temporary short data by being arranged in wireless access network or core net realizes, preferably, this entity storage class is the data of short data.And in wireless access network to the short data Delivery Function be provided with short data memory space threshold value and memory time threshold value.
Wireless access network judges whether described data are short data information after receiving data on the competitive channel.If received data are not short data information, then wireless access network is made corresponding response according to the type of data, and for example, if the data that received are control signalings, then wireless access network is carried out corresponding network operation according to this signaling.If received data are short data information, then leave short data in Delivery Function after, go up to terminal at forward common channels (for example FACH) and to send confirmation.
If in the buffer area of SDT short data is arranged, and the memory space of short data surpasses short data memory space threshold value, or the temporary time of short data is when surpassing short data threshold value memory time, then wireless access network is set up transmission channel with the related entities in the core net and is connected, and gives core net with data forwarding.The process that related entities in described wireless access network and the core net connects comprises: wireless access network sends transmission channel to core net and sets up request; When core net is ready to communicate with wireless access network, core net sends transmission channel to wireless access network and sets up and confirm; Then, wireless access network sends short data to core net.After transmission was finished, wireless access network sent transmission channel to core net and discharges request, when core net to wireless access network send transmission channel discharge confirm after, wireless access network discharge and core net between transmission channel.
If the temporary time that does not have the memory space of data or short data to be no more than short data memory space threshold value and short data in the buffer area of Delivery Function is no more than short data threshold value memory time, the transmission channel that then can not set up the related entities in wireless access network and the core net is connected, to save resource.
Fig. 3 b is the network work flow process figure that sets up transmission channel according to the embodiment of the invention between wireless access network and core net earlier.
Related entities in wireless access network and the core net has just been set up transmission channel and has been connected when operate as normal.Wireless access network is after receiving data on the competitive channel, judge whether it is short data information, if received data are not short data information, then wireless access network is made corresponding response according to the type of data, for example, if the data that received are control signalings, then wireless access network is carried out corresponding network operation according to this signaling.If received data are short data information, then short data is transmitted to the related entities of core net, go up to terminal at forward common channels (for example FACH) then and send confirmation.
Fig. 4 represents according to the embodiment of the invention, and the schematic diagram of competitive channel frame structure is with transmission short data and short data relevant information.Comprise following territory in the frame structure of described competitive channel: i.e. short data sign, terminal iidentification, destination address, authentication ciphering information and short data.Wherein, it is control information, short data information or out of Memory that the data type territory is used for designation data, if the indication of data type territory is a short data information, then also comprises following information: the terminal iidentification territory; Authentication ciphering information; Destination address, and short data.Wherein, described terminal iidentification is unique sign of determining this subscriber equipment; Authentication ciphering information is the sign that authenticates between terminal and the network, for example authentication and encryption key etc.; Destination address is represented the destination-address (for example, Target IP) that this short data will be sent out.If the indication of data type territory is the RRC signaling information, then be correspondingly processed, be not described specifically at this.
Though the invention discloses the foregoing description; but specific embodiment be not be used for limiting of the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; can make some modifications and retouching, so protection scope of the present invention should be as the criterion with the scope that appending claims defines.
Claims (14)
1, a kind of method of utilizing competitive channel to carry out the short data transmission is characterized in that, comprising:
A) under idle condition, terminal sends short data by competitive channel to wireless access network;
B) after wireless access network receives the short data of competitive channel transmission, short data is carried out verification;
C) when according to check results, wireless access network confirms to receive correct short data, then sends confirmation to terminal.
2, the method for utilizing competitive channel to carry out the short data transmission as claimed in claim 1, it is characterized in that, the short data relevant information is sent to wireless access network by competitive channel with short data, and described short data relevant information comprises short data sign, destination address, authentication and encryption key or terminal iidentification.
3, the method for utilizing competitive channel to carry out the short data transmission as claimed in claim 1, it is characterized in that, when short data amount that the length of short data can be carried greater than competitive channel, short data is carried out segmentation, and comprise the branch segment identification at frame head, form a plurality of short data, be divided into repeatedly and send to wireless access network by competitive channel.
4, the method for utilizing competitive channel to carry out the short data transmission as claimed in claim 3 is characterized in that, the related entities in the wireless access network carries out being transmitted to core net after the short data reorganization according to minute segment identification.
5, the method for utilizing competitive channel to carry out the short data transmission as claimed in claim 1 is characterized in that described competitive channel is RACH, UpPCH or UL_SCH.
6, the method for utilizing competitive channel to carry out the short data transmission as claimed in claim 1, it is characterized in that, when terminal does not receive the number of times that sends data by competitive channel from the affirmation information of wireless access network and terminal when being no more than maximum number of times of transmission in the given time, send short data to wireless access network once more, when the number of times that sends data by competitive channel when terminal surpasses maximum number of times of transmission, send failure.
7, the method for utilizing competitive channel to carry out the short data transmission as claimed in claim 1, it is characterized in that when terminal receives the confirmation information in the given time, then terminal sends the short data success, process finishes, and radio access layer is transmitted to short data the related entities of core net subsequently.
8, the method for utilizing competitive channel to carry out the short data transmission as claimed in claim 1 is characterized in that the step that the data that wireless access network is sent competitive channel are handled comprises: judge whether received data are short data; Short data is carried out CRC check.
9, the method for utilizing competitive channel to carry out the short data transmission as claimed in claim 7 is characterized in that, judges by the sign of the data type in the short data relevant information whether the data type that receives is short data.
10, the method for utilizing competitive channel to carry out short data transmission as claimed in claim 1 is characterized in that, when wireless access network and core net have been set up and be connected; After wireless access network receives short data, the short data in the buffer is sent to the core net related entities.
11, the method for utilizing competitive channel to carry out the short data transmission as claimed in claim 1 is characterized in that, when not connecting between wireless access network and the core net, by the entity stores short data in the wireless access network.
12, the method for utilizing competitive channel to carry out the short data transmission as claimed in claim 10, it is characterized in that, in the buffer area as sporocarp short data is arranged, and the memory space of short data surpasses short data memory space threshold value, or the temporary time of short data is when surpassing short data threshold value memory time, then wireless access network is set up transmission channel with the related entities in the core net and is connected, and data are sent to core net.
13, as claim 10, the 11 or 12 described methods of utilizing competitive channel to carry out the short data transmission, it is characterized in that core net mails to the destination according to the destination address of short data with described short data.
14, the method for utilizing competitive channel to carry out the short data transmission as claimed in claim 1 is characterized in that, when the terminal logging in network, authentication and encryption key is kept at terminal and network terminal.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102047718B (en) * | 2008-01-31 | 2014-04-02 | 交互数字专利控股公司 | Method and apparatus for performing discontinuous reception and downlink inter-frequency and inter-radio access technology measurements in CELL_FACH state |
| WO2016134526A1 (en) * | 2015-02-27 | 2016-09-01 | 华为技术有限公司 | Random access method, user equipment and base station |
| US10999703B2 (en) | 2016-09-30 | 2021-05-04 | Huawei Technologies Co., Ltd. | Method for transmitting positioning assistance data and device |
| CN113015259A (en) * | 2021-02-23 | 2021-06-22 | 江苏未来智慧信息科技有限公司 | Tool cabinet background management system and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085473C (en) * | 1995-03-01 | 2002-05-22 | 诺基亚流动电话有限公司 | Data transmission in radio telephone net work |
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2006
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102047718B (en) * | 2008-01-31 | 2014-04-02 | 交互数字专利控股公司 | Method and apparatus for performing discontinuous reception and downlink inter-frequency and inter-radio access technology measurements in CELL_FACH state |
| US9801077B2 (en) | 2008-01-31 | 2017-10-24 | Interdigital Patent Holdings, Inc. | Method and apparatus for performing discontinuous reception and downlink inter-frequency and inter-radio access technology measurements in CELL—FACH state |
| US10560852B2 (en) | 2008-01-31 | 2020-02-11 | Interdigital Patent Holdings, Inc. | Method and apparatus for performing discontinuous reception and downlink inter-frequency and inter-radio access technology measurements in CELL_FACH state |
| WO2016134526A1 (en) * | 2015-02-27 | 2016-09-01 | 华为技术有限公司 | Random access method, user equipment and base station |
| CN107113700A (en) * | 2015-02-27 | 2017-08-29 | 华为技术有限公司 | Accidental access method, user equipment and base station |
| CN107113700B (en) * | 2015-02-27 | 2020-04-03 | 华为技术有限公司 | Random access method, user equipment and base station |
| US10999703B2 (en) | 2016-09-30 | 2021-05-04 | Huawei Technologies Co., Ltd. | Method for transmitting positioning assistance data and device |
| CN113015259A (en) * | 2021-02-23 | 2021-06-22 | 江苏未来智慧信息科技有限公司 | Tool cabinet background management system and method |
| CN113015259B (en) * | 2021-02-23 | 2023-03-07 | 江苏未来智慧信息科技有限公司 | Tool cabinet background management system and method |
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| CN101018351B (en) | 2012-08-29 |
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