Method and device for controlling set-up of user-plane bearer
First Claim
1. A method for controlling a user-plane bearer to be established, the method comprises:
- determining, by a Mobility Management Entity, MME, whether a Serving Gateway, SGW, needs to transmit buffered downlink data to a User Equipment, UE, in a Tracking Area Update, TAU, procedure;
in response to a determination that the SGW needs to transmit buffered downlink data to the UE in the TAU procedure, initiating, by the MME, a procedure of establishing a user-plane bearer for the UE;
in response to a determination that the SGW does not need to transmit buffered downlink data to the UE in the TAU procedure and the UE does not need to transmit uplink data in the TAU procedure, not initiating, by the MME, the procedure of establishing a user-plane bearer for the UE,wherein the determining, by the MME, that the SGW needs to transmit buffered downlink data to the UE comprises;
determining, by the MME, a time or receiving a Context Request message of a new MME which is relocated, is earlier than a recorded timestamp, the recorded timestamp is determined by the MME from a length of time for which the MME indicates the SGW to buffer downlink data of the UE in case of determining that the UE is unreachable;
or the recorded timestamp is a sum of time when the MME indicates the SGW to buffer downlink data of the UE in a case of determining that the UE is unreachable, and a length of time for which the MME indicates the SGW to buffer downlink data of the UE;
ordetermining by the MME, that a time when a bearer related message of the SGW is received is earlier than a recorded timestamp, which is determined by the MME from a length of time for which the MME indicates the SGW to buffer downlink data of the UE in a case of determining that the UE is unreachable, or which is a sum of a time when the MME indicates the SGW to buffer downlink data of the UE in a case of determining that the UE is unreachable, and a length of time for which the MME indicates the SGW to buffer downlink data of the UE.
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Accused Products
Abstract
Disclosed are a method and device for controlling set-up of a user side bearer, aiming to solve the problem of an unnecessary signaling overhead caused by the fact that a UE initiates a TAU process after an SGW deletes cached downlink data of the UE when a timer has timed out, and an MME still initiates a set-up process of a user side between the UE and a base station. The method comprises: in a tracking area updating (TAU) process, a mobility management entity (MME) determining that a serving gateway (SGW) needs to send cached downlink data to a terminal UE; and the MME initiating a set-up process of an air interface user side bearer of the UE.
2 Citations
8 Claims
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1. A method for controlling a user-plane bearer to be established, the method comprises:
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determining, by a Mobility Management Entity, MME, whether a Serving Gateway, SGW, needs to transmit buffered downlink data to a User Equipment, UE, in a Tracking Area Update, TAU, procedure; in response to a determination that the SGW needs to transmit buffered downlink data to the UE in the TAU procedure, initiating, by the MME, a procedure of establishing a user-plane bearer for the UE; in response to a determination that the SGW does not need to transmit buffered downlink data to the UE in the TAU procedure and the UE does not need to transmit uplink data in the TAU procedure, not initiating, by the MME, the procedure of establishing a user-plane bearer for the UE, wherein the determining, by the MME, that the SGW needs to transmit buffered downlink data to the UE comprises; determining, by the MME, a time or receiving a Context Request message of a new MME which is relocated, is earlier than a recorded timestamp, the recorded timestamp is determined by the MME from a length of time for which the MME indicates the SGW to buffer downlink data of the UE in case of determining that the UE is unreachable;
or the recorded timestamp is a sum of time when the MME indicates the SGW to buffer downlink data of the UE in a case of determining that the UE is unreachable, and a length of time for which the MME indicates the SGW to buffer downlink data of the UE;
ordetermining by the MME, that a time when a bearer related message of the SGW is received is earlier than a recorded timestamp, which is determined by the MME from a length of time for which the MME indicates the SGW to buffer downlink data of the UE in a case of determining that the UE is unreachable, or which is a sum of a time when the MME indicates the SGW to buffer downlink data of the UE in a case of determining that the UE is unreachable, and a length of time for which the MME indicates the SGW to buffer downlink data of the UE. - View Dependent Claims (2, 3, 4)
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5. A Mobility Management Entity, MME, comprising a memory configured to store computer readable programs and at a least one processor:
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wherein the at least one processor is configured to execute the computer readable programs to; determine whether a Serving Gateway, SGW, needs to transmit buffered downlink data to a User Equipment, UE, in a Tracking Area Update, TAU, procedure; in response to a determination that the SGW needs to transmit buffered downlink data to the UE in the TAU procedure, initiate a procedure of establishing a user-plane bearer for the UE; in response to that the SGW does not need to transmit buffered downlink data to the UE in the TAU procedure and the UE does not need to transmit uplink data in the TAU procedure, not initiate the procedure of establishing a user-plane bearer for the UE; wherein the at least one processor is configured to execute the computer readable programs to determine whether that the SGW needs to transmit buffered downlink data to the UE in the TAU procedure by; determining a time of receiving a Context Request message of a new MME which is relocated, is earlier than a recorded timestamp the recorded timestamp is determined by the MME from a length of time for which the MME indicates the SGW to buffer downlink data of the UE in a case of determining that the UE is unreachable;
or the recoded timestamp is a sum of a time when the MME indicates the SGW to buffer downlink data of the UE in a case of determining that the UE is unreachable, and a length of time for which the MME indicates the SGW to buffer downlink data of the UE;
ordetermining that a time when a bearer related message of the SGW is received is earlier than a recorded timestamp, which is determined by the MME from a length of time for which the MME indicates the SGW to buffer downlink data of the UE in a case of determining that the UE is unreachable;
or which is a sum of a time when the MME indicates the SGW buffer downlink data of the UE in a case of determining that the UE is reachable, and a length of time for which the MME indicates the SGW to buffer downlink data of the UE. - View Dependent Claims (6, 7, 8)
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Specification