Abstract
An embodiment of the present disclosure may provide an inter-MeNB handover method in a small cell system, including: making, by a source MeNB and/or target MeNB, a determination as to whether to maintain a SeNB when handover is performed; and triggering different handover processes according to a result of the determination as to whether to maintain the SeNB. Another embodiment of the present disclosure may further provide an inter-MeNB handover device in a small cell system. With the inter-MeNB handover method and device in a small cell system provided by the present disclosure, unnecessary deletion and re-establishment of the bearers at the SeNB for the UE may be reduced. False bearer deletion may be avoided and data forwarding may be reduced. Furthermore, the SeNB may be maintained according to network deployment and SGW re-selection may be supported. Therefore, system capacity and transmission speed of the data may be improved.
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4G | 23/01/2019 | ISLD-201901-009 | SAMSUNG | Yes | Basis Patent | ||||
4G | 08/05/2019 | ISLD-201905-012 | SAMSUNG |
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4G | 30/07/2019 | ISLD-201907-046 | SAMSUNG | Yes | Basis Patent | ||||
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Not Available | 30/07/2019 | ISLD-201907-046 | SAMSUNG |
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5G | 22/12/2019 | ISLD-201912-072 | SAMSUNG |
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Specification Information
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CN106162771A | 4G | 23/01/2019 | ISLD-201901-009 | SAMSUNG | No | Family Member | ||||
CN106162771A | 4G | 08/05/2019 | ISLD-201905-012 | SAMSUNG |
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CN106162771A | 4G | 30/07/2019 | ISLD-201907-046 | SAMSUNG | No | Family Member | ||||
CN106162771A | 5G | 30/07/2019 | ISLD-201907-046 | SAMSUNG | No | Family Member | ||||
CN106162771A | Not Available | 30/07/2019 | ISLD-201907-046 | SAMSUNG |
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CN106162771A | 5G | 22/12/2019 | ISLD-201912-072 | SAMSUNG |
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EP3167657A1 | 4G | 23/01/2019 | ISLD-201901-009 | SAMSUNG | No | Family Member | ||||
EP3167657A1 | 4G | 08/05/2019 | ISLD-201905-012 | SAMSUNG |
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EP3167657A1 | 4G | 30/07/2019 | ISLD-201907-046 | SAMSUNG | No | Family Member | ||||
EP3167657A1 | 5G | 30/07/2019 | ISLD-201907-046 | SAMSUNG | No | Family Member | ||||
EP3167657A1 | Not Available | 30/07/2019 | ISLD-201907-046 | SAMSUNG |
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EP3167657A1 | 5G | 22/12/2019 | ISLD-201912-072 | SAMSUNG |
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EP3167657A4 | 4G | 23/01/2019 | ISLD-201901-009 | SAMSUNG | No | Family Member | ||||
EP3167657A4 | 4G | 08/05/2019 | ISLD-201905-012 | SAMSUNG |
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EP3167657A4 | 4G | 30/07/2019 | ISLD-201907-046 | SAMSUNG | No | Family Member | ||||
EP3167657A4 | 5G | 30/07/2019 | ISLD-201907-046 | SAMSUNG | No | Family Member | ||||
EP3167657A4 | Not Available | 30/07/2019 | ISLD-201907-046 | SAMSUNG |
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EP3167657A4 | 5G | 22/12/2019 | ISLD-201912-072 | SAMSUNG |
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WO2016006969A1 | 4G | 23/01/2019 | ISLD-201901-009 | SAMSUNG | No | Family Member | ||||
WO2016006969A1 | 4G | 08/05/2019 | ISLD-201905-012 | SAMSUNG |
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WO2016006969A1 | 4G | 30/07/2019 | ISLD-201907-046 | SAMSUNG | No | Family Member | ||||
WO2016006969A1 | 5G | 30/07/2019 | ISLD-201907-046 | SAMSUNG | No | Family Member | ||||
WO2016006969A1 | Not Available | 30/07/2019 | ISLD-201907-046 | SAMSUNG |
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WO2016006969A1 | 5G | 22/12/2019 | ISLD-201912-072 | SAMSUNG |
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Technologies
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Use Cases
Services
Claim
1. An inter-master enhanced NodeB (MeNB) handover method in a small cell system, the method comprising:
determining, by a source MeNB, whether to maintain a secondary eNB (SeNB) when a handover is performed; and triggering a handover process based on a result of the determination as to whether to maintain the SeNB.
2. The method according to claim 1,
wherein, before the triggering of the handover process:
sending, by the source MeNB, a handover request message to a target MeNB if the result of the determination made by the source MeNB is maintaining the SeNB; and
receiving, by the source MeNB, a handover request acknowledgement message from the target MeNB, and
wherein the handover request acknowledgement message comprises the result of the determination as to whether to maintain the SeNB.
3. The method according to claim 1,
wherein, before the triggering of the handover process:
sending, by the source MeNB, a handover request message to a target MeNB; and
receiving, by the source MeNB, a handover request acknowledgement message from the target MeNB, and
wherein the handover request acknowledgement message comprises the result of the determination as to whether to maintain the SeNB.
4. The method according to claim 1, wherein, before the triggering of the handover process:
obtaining the result of the determination as to whether to maintain the SeNB.
5. The method according to claim 1,
wherein, before the triggering of the handover process:
sending, by the source MeNB, a handover request message to a target MeNB; and
receiving, by the source MeNB, a handover request acknowledgement message from the target MeNB,
wherein the handover request acknowledgement message includes at least one of information indicating whether there is an X2 interface between the target MeNB and the SeNB and information indicating whether it is feasible to maintain the SeNB, and wherein the determination as to whether to maintain the SeNB is performed according to the at least one of the information in the handover request acknowledgement message.
6. The method according to claim 2, wherein the handover request message comprises one of or combination of multiple kinds of the following information:
a cell Identity (ID) of a secondary cell (Scell) of a user equipment (UE) at the SeNB; an eNB ID of the SeNB; a bearer of the UE at the SeNB; information about whether the bearer of the UE at the SeNB is a split bearer or a SeNB cell group (SCG) bearer; a measurement result of the UE; an ID of the UE at the SeNB; and a downlink (DL) tunnel endpoint Identifier (TEID) and DL transmission layer address of an X2 interface allocated by the SeNB to the split bearer.
7. The method according to claim 1, wherein the triggering of the handover process based on the result of the determination as to whether to maintain the SeNB comprises:
switching a bearer from the SeNB to a target MeNB in the handover process if the result of the determination is not maintaining the SeNB; and maintaining the bearer at the SeNB in the handover process if the result of the determination is maintaining the SeNB.
8. An inter-master enhanced NodeB (MeNB) handover method in a small cell system, the method comprising:
determining, by a target MeNB, whether to maintain a secondary eNB (SeNB) when a handover is performed; and triggering a handover process based on a result of the determination as to whether to maintain the SeNB.
9. The method according to claim 8, wherein the triggering of the handover process based on the result of the determination as to whether to maintain the SeNB comprises:
switching a bearer from the SeNB to a target MeNB in the handover process if the result of the determination is not maintaining the SeNB; and maintaining the bearer at the SeNB in the handover process if the result of the determination is maintaining the SeNB.
10. The method according to claim 9, wherein the maintaining of the bearer at the SeNB comprises:
allocating, by the target MeNB, a DL TEID and DL transmission layer address used between the target MeNB and a serving gateway (SGW) to split the bearer at the SeNB, sending, by the target MeNB, the DL TEID and DL transmission layer address to the source MeNB via a handover request acknowledgement message, and sending, by the source MeNB, the DL TEID and DL transmission layer address to the Mobile Management Entity (MME) via a path switch request message; as for SCG bearer at the SeNB, not allocating, by the target MeNB, the DL TEID and DL transmission layer address to the SCG bearers and sending an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Radio Access Bearer (E-RAB) modification indication or enhanced path switch request message to the MME; the E-RAB modification indication or enhanced path switch request message comprising: a Tracking Area Identity and/or E-UTRAN Cell Global Identifier (ECGI) of a Primary cell (Pcell) of the target MeNB, and a TAI and/or ECGI of a Scell at the SeNB; and as for bearer, which is handed over to the target MeNB and in case data forwarding is needed, allocating, by the target MeNB, a TEID and transmission layer address of an X2 interface for the data forwarding, wherein a Radio Resource Control (RRC) re-configuration message sent from the source MeNB to the UE does not comprise information instructing the UE to delete a SCG.
11. The method according to claim 9, wherein, when the result of the determination is maintaining the SeNB, the method further comprises:
making, by the target MeNB, a determination as to whether to modify configuration of bearer of the UE at the SeNB according to the configuration of the bearer of the UE made by the target MeNB and/or UE capability information; sending, by the target MeNB, an SCG configuration request message to the SeNB if a result of the determination at the SeNB is modifying the configuration of the bearer of the UE at the SeNB; and sending, by the SeNB, an SCG configuration response message to the target MeNB.
12. The method according to claim 11,
wherein the SCG configuration request message comprises:
an ID of the UE at the SeNB, an MeNB UE X2AP ID allocated by the target MeNB for the UE, which is used to identify the UE between the target MeNB and the SeNB, and/or a new key of the UE in a Scell calculated by the target MeNB, and
wherein the SCG configuration response message comprises:
a RRC container configured by the SeNB, and
a SeNB UE X2AP ID, which is allocated by the SeNB to identify the UE between the target MeNB and the SeNB.
13. The method according to claim 9,
wherein, when the result of the determination is maintaining the SeNB, the method further comprises:
sending, by the target MeNB, a UE configuration completion message to the SeNB,
wherein the UE configuration completion message comprises: an MeNB UE X2AP ID between the target MeNB and the SeNB allocated by the target MeNB for the UE, wherein, if the target MeNB modified configuration of the SeNB before the target MeNB sends the UE configuration completion message to the SeNB, the UE configuration completion message comprises: an SeNB UE X2AP ID, which is allocated by the SeNB to identify the UE between the target MeNB and the SeNB; wherein, if the target MeNB didn't modify the configuration of the SeNB before the target MeNB sends the UE configuration completion message to the SeNB, the UE configuration completion message comprises: information used by the SeNB to identify the UE, the information being a cell ID of a S cell at the SeNB and a Cell Radio Network Temporary Identifier (C-RNTI) of the UE in the Scell; wherein, if there are multiple serving S cells at the SeNB, the information, which is used by the SeNB to identify the UE comprises: multiple Pairs of cell ID of the S cell and C-RNTI or the SeNB UE X2AP ID of the UE allocated by the SeNB; and wherein, if the information, which is used by the SeNB to identify the UE, is the SeNB UE X2AP ID of the UE allocated by the SeNB, the UE configuration completion message further comprises: the ID of the source MeNB and/or the MeNB UE X2AP ID allocated by the source MeNB.
14. The method according to claim 13,
wherein as for split bearer, the UE configuration completion message further comprises: an Evolved Radio Access Bearer (E-RAB) ID and a TEID and transmission layer address allocated by the target MeNB, and wherein in a situation that an SGW is re-selected, as for SCG bearer, the UE configuration completion message further comprises: a UL TEID and UL transmission layer address allocated by a new SGW.
15. An inter-master enhanced NodeB (MeNB) handover device in a small cell system, the device comprising:
a determination module configured to make a determination as to whether to maintain a secondary eNB (SeNB) when a handover is performed; and a handover module configured to trigger a handover process according to a result of the determination as to whether to maintain the SeNB.
16. The device of claim 15, further comprising:
a transceiver configured to:
send a handover request message to a target MeNB, and
receive a handover request acknowledgement message from the target MeNB,
wherein the handover request acknowledgement message comprises the result of the determination as to whether to maintain the SeNB.
17. The device of claim 15, further comprising:
a transceiver configured to:
send a handover request message to a target MeNB, and
receive a handover request acknowledgement message from the target MeNB,
wherein the handover request acknowledgement message includes at least one of information indicating whether there is an X2 interface between the target MeNB and the SeNB and information indicating whether it is feasible to maintain the SeNB, and wherein the determination as to whether to maintain the SeNB is performed according to the at least one of the information in the handover request acknowledgement message.
18. The device of claim 16, wherein the handover request message comprises one of or combination of multiple kinds of the following information:
a cell Identity (ID) of a secondary cell (Scell) of a user equipment (UE) at the SeNB; an eNB ID of the SeNB; a bearer of the UE at the SeNB; information about whether the bearer of the UE at the SeNB is a split bearer or a SeNB cell group (SCG) bearer; a measurement result of the UE; an ID of the UE at the SeNB; and a downlink (DL) tunnel endpoint Identifier (TEID) and DL transmission layer address of an X2 interface allocated by the SeNB to the split bearer.
19. The device of claim 15,
wherein the handover module is further configured to switch a bearer from the SeNB to a target MeNB in the handover process if the result of the determination is not maintaining the SeNB and maintain the bearer at the SeNB in the handover process if the result of the determination is maintaining the SeNB.
20. The device of claim 19,
wherein, if the result of the determination is maintaining the SeNB, the handover module is further configured to: make a determination as to whether to modify configuration of bearer of the UE at the SeNB according to the configuration of the bearer of the UE made by the target MeNB and/or UE capability information, send an SCG configuration request message to the SeNB if a result of the determination at the SeNB is modifying the configuration of the bearer of the UE at the SeNB, and send an SCG configuration response message to the target MeNB.
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.