Method for buffer status report in dual connectivity
First Claim
1. A method for buffer status report (BSR) in dual connectivity for a communication device in a wireless communication system, the method comprising:
- connecting to at least two base stations including a first base station and a second base station in the wireless communication system;
receiving a BSR configuration from the first base station, wherein the BSR configuration indicates a calculation scheme for a BSR; and
calculating buffer sizes indicated in a first BSR and a second BSR respectively for the first base station and the second base station according to the calculation scheme in the received BSR configuration, wherein at least a first logical channel of a first logical channel group reported by the first BSR and at least a second logical channel of a second logical channel group reported by the second BSR are mapped to a same split radio bearer;
wherein the calculation scheme indicates that a buffer size indicated in a BSR for a logical channel group is a sum of total data amount in packet data convergence protocol (PDCP) buffers of radio bearers belonging to the logical channel group and total data amount in radio link control (RLC) buffers of logical channels mapped to the radio bearers belonging to the logical channel group.
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Abstract
A method for buffer status report (BSR) in dual connectivity for a communication device in a wireless communication system is disclosed. The method comprises connecting to at least two base stations including a first base station and a second base station in the wireless communication system, receiving a BSR configuration from the first base station, wherein the BSR configuration indicates a calculation scheme for a BSR, and calculating buffer sizes indicated in a first BSR and a second BSR respectively for the first base station and the second base station according to the calculation scheme in the received BSR configuration, wherein at least a first logical channel of a first logical channel group reported by the first BSR and at least a second logical channel of a second logical channel group reported by the second BSR are mapped to the same split radio bearer.
13 Citations
16 Claims
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1. A method for buffer status report (BSR) in dual connectivity for a communication device in a wireless communication system, the method comprising:
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connecting to at least two base stations including a first base station and a second base station in the wireless communication system; receiving a BSR configuration from the first base station, wherein the BSR configuration indicates a calculation scheme for a BSR; and calculating buffer sizes indicated in a first BSR and a second BSR respectively for the first base station and the second base station according to the calculation scheme in the received BSR configuration, wherein at least a first logical channel of a first logical channel group reported by the first BSR and at least a second logical channel of a second logical channel group reported by the second BSR are mapped to a same split radio bearer; wherein the calculation scheme indicates that a buffer size indicated in a BSR for a logical channel group is a sum of total data amount in packet data convergence protocol (PDCP) buffers of radio bearers belonging to the logical channel group and total data amount in radio link control (RLC) buffers of logical channels mapped to the radio bearers belonging to the logical channel group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for buffer status report (BSR) in dual connectivity for a first base station in a wireless communication system, the method comprising:
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coordinating to a second base station of the wireless communication system by exchanging information of at least one of mapping information of a radio bearer, a logical channel and a logical channel group (LCG), backhaul latency, loading of the first base station and the second base station, a number of communication devices in the first base station and the second base station, how much ratio of uplink data that the first base station and the second base station in charge of, and an amount uplink data per time unit for the first base station and the second base station; and assigning a BSR configuration to a communication device of the wireless communication system to indicate the communication device how to calculate a buffer size indicated in a BSR; wherein the BSR configuration includes ratios of uplink resources allocation for the first base station and the second base station, wherein the ratios of uplink resource allocation is determined by the first base station or by coordination between the first base station and the second base station, loading information of the first base station and the second base station, a threshold, and an indicator for indicating which base station the communication device should send the BSR to. - View Dependent Claims (13, 14, 15, 16)
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Specification