公开(公告)号：US11223991B2

公开(公告)日：2022-01-11

申请号：US16761425

申请日：2018-10-09

Applicant: Nokia Technologies Oy

Inventor： Janne Kaasalainen ,  Subramanya Chandrashekar ,  Tsunehiko Chiba ,  Raghuram Reddy Krishnamurthy ,  Pradeep Basavapura Veerabhadra Reddy

IPC: H04W36/22 ,  H04W76/27 ,  H04W8/24 ,  H04W48/18 ,  H04W48/20

Abstract: There is provided a method, comprising: detecting, by a first network node from a user equipment, a connection request to a first radio access technology, RAT; determining, before the user equipment is switched to a connected state in the first RAT, whether a second RAT is more suitable to serve the user equipment than the first RAT; and upon deciding that the second RAT is more suitable, providing the user equipment with connection information of the second RAT, wherein the connection information causes the user equipment to directly connect with the second RAT instead of the first RAT.

公开(公告)号：US20200329408A1

公开(公告)日：2020-10-15

申请号：US16301389

申请日：2017-05-03

Applicant: Nokia Technologies Oy

Inventor： Srinivasan Selvaganapathy ,  Tsunehiko Chiba

IPC: H04W36/00 ,  H04W76/11 ,  H04W40/36

Abstract: Methods and apparatus, including computer program products, are provided for user-plane switching of traffic for dual connectivity. In some example embodiments, there is provided a method. The method may include receiving, at a serving gateway, an indication to persist a first tunnel identifier located at a master base station, while the serving gateway sends, towards a second tunnel identifier located at a secondary node, user plane traffic for a user equipment in dual connectivity with the master base station and the secondary node; and switching, at the serving gateway, the user plane traffic between the second tunnel identifier and the first tunnel identifier, when the serving gateway receives, via a user plane, an error indication and/or a switch indication. Related apparatus, systems, methods, and articles are also described.

公开(公告)号：US10355836B2

公开(公告)日：2019-07-16

申请号：US15565285

申请日：2015-05-14

Applicant: Nokia Technologies Oy

Inventor： Devaki Chandramouli ,  Tsunehiko Chiba

IPC: H04W4/00 ,  H04L5/00 ,  H04W72/04 ,  H04W76/11 ,  H04W76/15 ,  H04W84/04 ,  H04W84/12

Abstract: In some example embodiments, there is provided a method. The method may include generating, by a network node, a message including an indication of whether a bearer is at least one of a default bearer or a dedicated bearer; and sending, by the network node, the generated message, wherein the generated message is sent to a base station to enable the base station to control assignment of the bearer to a macrocell when the indication represents that the bearer is a default bearer. Related systems, methods, and articles of manufacture are also described.

公开(公告)号：US11057766B2

公开(公告)日：2021-07-06

申请号：US16178266

申请日：2018-11-01

Applicant: Nokia Technologies Oy

Inventor： Suresh P. Nair ,  Tsunehiko Chiba ,  Philippe Godin

IPC: H04W12/04 ,  H04W12/10 ,  H04W92/10 ,  H04W12/041 ,  H04W12/60

Abstract: A reconfiguration message is received at user equipment in a communication system from a disaggregated base station with which the user equipment has a current security context established. The reconfiguration message comprises an instruction to compute a new security context based on a security domain counter value, wherein the security domain counter value represents a given security domain from a plurality of security domains supported by the disaggregated base station. The new security context is computed at the user equipment for the given security domain based on the security domain counter value. A set of security keys are derived from the new security context at the user equipment.

公开(公告)号：US20190182713A1

公开(公告)日：2019-06-13

申请号：US16324665

申请日：2017-07-31

Applicant: Nokia Technologies Oy

Inventor： Srinivasan Selvaganapathy ,  Xiang Xu ,  Tsunehiko Chiba

IPC: H04W28/14 ,  H04L29/08

Abstract: Disclosed is a method in a mobile network providing dual connectivity with local caching at access point. The method comprises a master access node (MeNB) and a secondary access node (SeNB). The master access node and the secondary access node exchange cache capability and cache content information based on which the master access node configures a secondary cell group bearer. Packets received at the secondary access node comprising a request for cacheable content are forwarded to the master access node for content retrieval if the content is not available at the local cache of the secondary access node. Other packets are forwarded directly to a serving gateway. The invention relates also to an apparatus, a computer program product and a non-transitory computer-readable medium.

公开(公告)号：US20190132713A1

公开(公告)日：2019-05-02

申请号：US16091499

申请日：2017-03-22

Applicant: Nokia Technologies Oy

Inventor： Xiang Xu ,  Srinivasan Selvaganapathy ,  Tsunehiko Chiba

IPC: H04W4/24 ,  H04L12/14

Abstract: Methods and apparatus, including computer program products, are provided for charging in multi-connectivity systems. In some example embodiments, there may be provided a method that includes marking, by a first base station serving a user equipment, at least one packet to include a first indication indicating that the at least one packet was received directly at the first base station serving the user equipment; and marking, by the first base station, at least one other packet to include a second indication to indicate that the at least one other packet was received via a second base station also serving the user equipment. Related systems, methods, and articles of manufacture are also described.

公开(公告)号：US11115880B2

公开(公告)日：2021-09-07

申请号：US16301389

申请日：2017-05-03

Applicant: Nokia Technologies Oy

Inventor： Srinivasan Selvaganapathy ,  Tsunehiko Chiba

IPC: H04W36/00 ,  H04W76/11 ,  H04W40/36 ,  H04W76/15

Abstract: Methods and apparatus, including computer program products, are provided for user-plane switching of traffic for dual connectivity. In some example embodiments, there is provided a method. The method may include receiving, at a serving gateway, an indication to persist a first tunnel identifier located at a master base station, while the serving gateway sends, towards a second tunnel identifier located at a secondary node, user plane traffic for a user equipment in dual connectivity with the master base station and the secondary node; and switching, at the serving gateway, the user plane traffic between the second tunnel identifier and the first tunnel identifier, when the serving gateway receives, via a user plane, an error indication and/or a switch indication. Related apparatus, systems, methods, and articles are also described.

公开(公告)号：US20200029242A1

公开(公告)日：2020-01-23

申请号：US16042888

申请日：2018-07-23

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Matthew Andrews ,  Sem Borst ,  Siegfried Klein ,  Silvio Mandelli ,  Tsunehiko Chiba

IPC: H04W28/02 ,  H04W24/10 ,  H04W72/04 ,  H04W72/08

Abstract: A 5G network communicates per-slice constraints for QoS parameter values from a centralized unit (CU) to a MAC scheduler of a distributed unit (DU). The CU communicates these per-slice constraints, rather than or in addition to per-DRB constraints, to the MAC scheduler over the CU/DU interface. In some implementations, the CU/DU interface is an F1 air interface as defined in specification 38.473 in the 3GPP standard. In some implementations, the DU provides per-slice performance feedback over the CU/DU interface. Based on such feedback, the CU may adjust the per-slice QoS constraints.