CN107645753B - Position reporting method during UE cell reselection - Google Patents
Position reporting method during UE cell reselection Download PDFInfo
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- CN107645753B CN107645753B CN201710835496.8A CN201710835496A CN107645753B CN 107645753 B CN107645753 B CN 107645753B CN 201710835496 A CN201710835496 A CN 201710835496A CN 107645753 B CN107645753 B CN 107645753B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a position reporting method when a UE cell reselects, for the UE in an RRC idle state or an RRC non-activated state, after the UE reselects to another cell, if the UE does not perform network side notification area update or core network tracking area update, the UE sends a position reporting message to the reselected cell, so that the network side can know the position information of the UE; meanwhile, the UE is still in an RRC idle state or an RRC non-activated state without RRC state transition; when the network needs to send the paging message to the RRC idle state or the RRC inactive UE, the network only needs to send the paging message through the cell where the UE is located. The invention can ensure that the network can determine the position of the UE in the RRC idle state or the RRC non-activated state, so that the network can determine the cell of the UE without converting the UE into the RRC connected state only by sending the paging message to the UE by the cell of the UE, thereby reducing signaling overhead and network energy consumption.
Description
Technical Field
The invention relates to the technical field of 5G wireless communication, in particular to a position reporting method of UE (user equipment) during cell reselection.
Background
In L TE, in order to confirm the location of the UE, L the TE network coverage area is divided into a plurality of Tracking Areas (TAs), where a TA is a basic unit for location update and paging in L TE system, and a TA may include one or more cells.
In 5G NR, a tracking area concept of L TE is adopted, namely a network coverage area of the 5G NR is also divided into a plurality of tracking areas, when the UE is in an RRC connected state, the network can determine the specific position of the UE, namely the specific cell in which the UE is positioned, when the UE is in an RRC idle state, the network can only determine that the UE is positioned in a certain cell in the tracking area, so if the network needs to page the UE, all cells in all tracking areas in a TA list of the UE can send paging messages to the UE, and in addition, considering a beam (beam) concept introduced in 5G NR, namely that a plurality of beams can exist in each cell, all beams in all tracking areas in the TA list of the UE can send paging messages to the UE in order to send the paging messages to the RRC idle state.
In the 5G NR, a new RRC state, that is, an RRC inactive state function is introduced, and the network may configure a network side notification area for the RRC inactive UE, where the network side notification area includes one or more cells, and the network side notification area of the UE is generally smaller than a tracking area in a TA list of the UE. When the UE is in the RRC inactive state, the network can only determine that the UE is located in a certain cell in the network side tracking area, and if the network needs to send a paging message to the UE, the network side of the UE notifies all beams of all cells in the area to send the paging message to the UE.
Disclosure of Invention
When the UE is in an RRC idle state or an RRC inactive state, the network cannot determine a specific cell where the UE is located, but only a tracking area or a network side notification area where the UE is located, that is, the UE is located in the tracking area or the network side notification area of the UE. Therefore, the method for reporting the position of the UE during cell reselection is provided, so that the network can determine the cell where the UE is located, and when the network needs to page the UE, only the cell where the UE is located needs to send the paging message to the UE, thereby reducing the downlink signaling overhead of the network and saving the network energy consumption.
The technical scheme of the invention provides a position reporting method when a UE cell is reselected, for the UE in an RRC idle state or an RRC non-activated state, after the UE performs cell reselection to another cell, if the UE does not perform network side notification area update or core network tracking area update, the UE sends a position reporting message to the reselected cell, so that the network side acquires the position information of the UE; meanwhile, the UE is still in an RRC idle state or an RRC non-activated state without RRC state transition; when the network needs to send the paging message to the RRC idle state or the RRC inactive UE, the network only needs to send the paging message to the UE through the cell where the UE is located.
And the UE sends a position reporting message to the reselected cell, wherein the position reporting message consists of a random access preamble sequence and a UE identifier.
And, the determining method of the random access leader sequence is that at least one random access leader sequence is reserved, and the UE uses the reserved random access leader sequence in the whole network.
Moreover, the random access preamble sequence is determined in such a way that one random access preamble sequence is reserved, and the same random access preamble sequence is used by the UE in the whole network.
Or, the random access preamble sequence is determined in a manner that a plurality of random access preamble sequences are reserved, and the UE randomly selects one random access preamble sequence when sending the location reporting message.
Or, the random access preamble sequence is determined in such a way that the broadcast message sent by the cell includes the random access preamble sequence and indicates that the random access preamble sequence is used for the UE to send the location reporting information, and the UE uses the random access preamble sequence in the cell broadcast message when sending the location information.
And, the cell broadcast message is minimum system information.
Also, the UE identifier is used for cell identification UE.
Furthermore, the UE identifier is IMSI or S-TMSI or GUTI or IMEI.
And when the base station to which the cell reselected by the UE belongs receives the position reporting message sent by the UE, the base station can determine that the message is the position information of the UE through the random access leader sequence in the message, and the base station does not respond to the message.
And if the base station to which the cell reselected by the UE belongs successfully receives the location reporting information sent by the UE, the network can send the paging message to the UE only through the cell in which the UE is located when the network needs to page the UE.
Moreover, if the base station to which the cell reselected by the UE belongs does not receive or does not successfully detect the location reporting information sent by the UE, when the network needs to page the UE, the UE core network tracking area or the network side notifies all cells in the area that a paging message needs to be sent to the UE.
Compared with the prior art, the invention has the advantages that: for the UE in the RRC idle state or the RRC inactive state, since the network does not determine the specific location of the UE, signaling overhead is large when sending the paging message, and network energy consumption is increased. According to the scheme, the network can determine the position of the UE in the RRC idle state or the RRC non-activated state, so that the cell where the UE is located is only required to send the paging message to the UE, and the signaling overhead and the network energy consumption are reduced. In addition, at present, if the network needs to determine the cell where the RRC idle state or the RRC inactive state UE is located, the RRC idle state or the RRC inactive state UE must be switched to the RRC connected state, and in the present scheme, the UE does not need to be switched to the RRC connected state, and the network can determine the cell where the UE is located, so that signaling overhead and energy consumption of the UE are further saved, and the method has an important market application value.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following will fully describe the technical solution of the present invention with reference to the embodiments of the present invention.
For the UE in an RRC idle state or an RRC non-activated state, after the UE performs cell reselection to another cell, if the UE does not perform network side notification area update or tracking area update, a message is sent to the reselected cell to indicate the UE to reselect the cell, so that the network side can acquire the position information of the UE. When the network needs to send a paging message to the RRC idle state or the RRC inactive UE, the network may send the paging message to the UE only through the cell where the UE is located.
An embodiment comprises the steps of:
1. for the RRC idle state or the RRC inactive state UE, after the UE reselects another cell, if the UE does not need (does not) to update the core network tracking area or the network side notification area, the UE sends a position reporting message to the reselected cell. The location reporting message is used to indicate the UE to reselect the cell, so that the network side can obtain the location information of the UE.
In specific implementation, if the core network tracking area update or the network side notification area update is needed, the network can determine the cell where the UE is located without sending the location reporting information and directly performing a corresponding area update procedure. The invention considers the situation that the UE does not need to update the tracking area or the network side notification area.
The message consists of a random access preamble sequence and a UE identifier;
the random access preamble sequence is determined as follows:
a) at least one random access preamble sequence is reserved, namely the UE uses the reserved random access preamble sequence in the whole network.
Specifically, if only one random access preamble sequence is reserved, the UE uses the same random access preamble sequence throughout the network. If a plurality of random access preamble sequences are reserved, the UE randomly selects one preamble sequence when each cell transmits the message.
If the number of the reserved random access leader sequences is more, the probability of random access sequence collision can be reduced, the success rate of the base station for receiving the UE position information is improved, but more random access leader sequences are needed. The method for reserving the random access leader sequence does not need network signaling to inform the UE which random access leader sequence is used, thereby reducing the network signaling overhead.
b) The broadcast message sent by the cell contains the random access leader sequence and indicates that the random access leader sequence is used for the UE to send the position reporting information, and the UE uses the random access leader sequence in the cell broadcast message when sending the position information. The broadcast message may preferably use minimum system information, and the UE in the RRC inactive state or the RRC idle state may also read the minimum system information.
The cell can configure the random access leader sequence which can be used by the UE for reporting the position information according to the use condition of the random leader sequence used by all the UE of the cell, thereby increasing the flexibility of using the random access leader sequence when the UE reports the position information.
The UE can use the reserved or random access preamble sequence indicated in the broadcast message only when transmitting the location reporting information.
The UE identifier is used for identifying the UE in the cell, and can be as follows:
a) IMSI (International Mobile Subscriber Identity)
b) S-TMSI (SAE temporal Mobile Station Identifier, SAE Temporary Mobile identity)
c) GUTI (Global Unique temporal Identifier)
d) IMEI (International Mobile Equipment Identity)
e) New UE identifier (New Standard possibly adopted by other industries)
The UE does not need to carry out state transition, namely the UE is still in an RRC idle state or an RRC non-activated state;
and 3, the base station to which the cell reselected by the UE belongs receives the message sent by the UE, and the base station can determine that the message is UE position reporting information through the random access leader sequence in the message, so that the base station can not respond to the message. And, the base station identifies the UE according to the UE identifier in the message, so that the base station can determine the cell where the UE is located after receiving the message sent by the UE, that is, the cell reselected in step 1;
4. if the base station to which the cell reselected by the UE belongs successfully receives the location reporting information sent by the UE, the network may send a paging message to the UE only through the cell in which the UE is located when the network needs to page the UE.
If the base station to which the cell reselected by the UE belongs does not receive or successfully detects the location reporting information sent by the UE, when the network needs to page the UE, the UE core network tracking area or the network side notifies all cells in the area that the paging message needs to be sent to the UE.
In specific implementation, the above method can be set to run automatically by those skilled in the art by using software technology.
The foregoing is directed to embodiments of the present application and it is understood that various modifications may be made without departing from the spirit and scope of the application.
Claims (11)
1. A position reporting method for UE cell reselection is characterized in that: for 5G wireless communication, for RRC idle state or RRC non-activated state UE, after the UE reselects another cell, if the UE does not perform network side notification area update or core network tracking area update, the UE sends a position reporting message to the reselected cell, so that the network side can know the position information of the UE; meanwhile, the UE is still in an RRC idle state or an RRC non-activated state without RRC state transition;
when the network needs to send a paging message to the RRC idle state or the RRC non-activated UE, the network only needs to send the paging message to the UE through the cell where the UE is located;
and the UE sends a position reporting message to the reselected cell, wherein the position reporting message consists of a random access leader sequence and a UE identifier.
2. The method of claim 1, wherein the method comprises: the random access leader sequence is determined in a mode that at least one random access leader sequence is reserved, and the UE uses the reserved random access leader sequence in the whole network.
3. The method of claim 2, wherein the method comprises: the random access leader sequence is determined by reserving one random access leader sequence, and the UE uses the same random access leader sequence in the whole network.
4. The method of claim 2, wherein the method comprises: the random access leader sequence is determined by reserving a plurality of random access leader sequences, and the UE randomly selects one random access leader sequence when sending the position report message.
5. The method of claim 1, wherein the method comprises: the random access leader sequence is determined in such a way that the broadcast message sent by the cell contains the random access leader sequence and indicates that the random access leader sequence is used for the UE to send the position reporting information, and the UE uses the random access leader sequence in the cell broadcast message when sending the position information.
6. The method of claim 5, wherein the method comprises: the cell broadcast message is minimum system information.
7. The method for reporting the location of the UE during cell reselection according to claim 2, 3, 4, 5 or 6, wherein: the UE identifier is used for cell identification UE.
8. The method of claim 7, wherein the method further comprises: the UE identifier is IMSI or S-TMSI or GUTI or IMEI.
9. The method for reporting the location of the UE during cell reselection according to claim 2, 3, 4, 5 or 6, wherein: when a base station to which a cell reselected by the UE belongs receives a position reporting message sent by the UE, the base station can determine that the message is the position information of the UE through a random access leader sequence in the message, and the base station does not respond to the message.
10. The method for reporting the location of the UE during cell reselection according to claim 1, 2, 3, 4, 5, or 6, wherein: if the base station to which the cell reselected by the UE belongs successfully receives the location reporting information sent by the UE, when the network needs to page the UE, the paging message can be sent to the UE only through the cell in which the UE is located.
11. The method for reporting the location of the UE during cell reselection according to claim 1, 2, 3, 4, 5, or 6, wherein: if the base station to which the cell reselected by the UE belongs does not receive or successfully detects the location reporting information sent by the UE, when the network needs to page the UE, the UE core network tracking area or the network side notifies all cells in the area that the paging message needs to be sent to the UE.
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| SG11201911545VA (en) | 2018-02-13 | 2020-01-30 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Radio communication method, terminal device and network device |
| CN110351830B (en) * | 2018-04-04 | 2020-12-04 | 华为技术有限公司 | Communication method and communication device |
| CN110381546B (en) * | 2018-04-13 | 2021-07-16 | 中国移动通信有限公司研究院 | Cell reselection method, terminal and network equipment |
| CN109314948A (en) * | 2018-09-04 | 2019-02-05 | 北京小米移动软件有限公司 | Transmit the method and device of lead code |
| CN110971373B (en) * | 2018-09-29 | 2022-04-12 | 大唐移动通信设备有限公司 | Configuration method of energy-saving area, base station, terminal and core network |
| CN109451549B (en) * | 2019-01-03 | 2021-09-14 | 中国联合网络通信集团有限公司 | Voice backspacing method and device and terminal equipment |
| CN111866970B (en) * | 2019-04-30 | 2021-12-28 | 华为技术有限公司 | Method and device for reporting position information |
| CN112437393B (en) * | 2019-08-07 | 2022-05-31 | 大唐移动通信设备有限公司 | Method, equipment and device for configuring reachability area |
| CN113678521A (en) * | 2020-03-13 | 2021-11-19 | 北京小米移动软件有限公司 | Information processing method and device, communication equipment and storage medium |
| CN113498126A (en) * | 2020-04-01 | 2021-10-12 | 中兴通讯股份有限公司 | Cell reselection method for terminal in inactive state, base station and computer readable medium |
| US20240064851A1 (en) * | 2021-02-26 | 2024-02-22 | Qualcomm Incorporated | Message transmission via non-terrestrial network |
| CN113596718A (en) * | 2021-08-03 | 2021-11-02 | 上海立可芯半导体科技有限公司 | Position reporting method after cell reselection, mobile terminal and server |
| CN116471534A (en) * | 2022-01-11 | 2023-07-21 | 华为技术有限公司 | Method and device for reporting position information |
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| US10051507B2 (en) * | 2013-07-03 | 2018-08-14 | Mediatek Inc. | Traffic shaping mechanism for UE power saving in idle mode |
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Address after: 430205 Hubei city of Wuhan province Jiangxia Hidden Dragon Island Tan lake two Road No. 1 Patentee after: CITIC Mobile Communication Technology Co., Ltd Address before: 430073 Hubei province Wuhan Dongxin East Lake high tech Development Zone, Road No. 5 Patentee before: Wuhan Hongxin Telecommunication Technologies Co.,Ltd. |
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Address after: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee after: CITIC Mobile Communication Technology Co.,Ltd. Address before: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee before: CITIC Mobile Communication Technology Co., Ltd |