QoS provisioning for LTE-WLAN aggregation
地域：
Hsinchu
摘要
LTE-WLAN aggregation (LWA) at the radio access network level promises significant gain in system capacity and user quality of experience (QoE). In order to support QoS over LWA, there is a need to develop mechanisms to ensure that the access category (AC) classification chosen by a wireless device (AP in the case of downlink, and UE in case of uplink) is consistent with the QoS requirements of the EPS bearer/DRB and/or subscriber profile to which the traffic belongs. The cellular LTE network can provision QoS for both downlink and uplink data flows that are transferred using LWA access.
說(shuō)明書
This application claims priority under 35 U.S.C. § 119 from U.S. Provisional Application No. 62/162,277 entitled “QoS Provisioning for LTE-WLAN Aggregation” filed on May 15, 2015, the subject matter of which is incorporated herein by reference.
The disclosed embodiments relate generally to wireless communication, and, more particularly, to QoS provisioning for LTE-WLAN aggregation.
Mobile data usage has been increasing at an exponential rate in recent year. A Long-Term Evolution (LTE) system offers high peak data rates, low latency, improved system capacity, and low operating cost resulting from simplified network architecture. In LTE systems, an evolved universal terrestrial radio access network (E-UTRAN) includes a plurality of base stations, such as evolved Node-B's (eNBs) communicating with a plurality of mobile stations referred as user equipment (UEs). However, the continuously rising demand for data traffic requires additional solutions. Interworking between the LTE network and the unlicensed spectrum WLAN provides additional bandwidth to the operators.
權(quán)利要求
What is claimed is:1. A method comprising:configuring LTE-WLAN aggregation (LWA) by a base station for a user equipment (UE) in a wireless network, wherein the UE is connected with both the base station and an LWA-enabled access point (AP); establishing a data radio bearer (DRB) with the UE, wherein the DRB corresponds to an evolved packet system (EPS) bearer associated with a QoS Class Identifier (QCI); determining access category (AC) information based on the QCI; and forwarding a data packet carrying the AC information and a protocol data unit (PDU) from the base station to the UE via the LWA-enabled AP over an LWA Wi-Fi link, wherein the PDU is to be transmitted to the UE using an AC value determined based on the AC information, and wherein the base station appends a special LWA header comprising the AC information to the data packet. 2. The method of claim 1 , wherein the base station and the AP are connected via a virtual local area network (VLAN), and wherein the data packet is an Ethernet frame having a VLAN tag containing the AC information. 3. The method of claim 2 , wherein the AC information comprises a Priority Code Point (PCP) field contained in the VLAN tag. 4. The method of claim 1 , wherein the PDU is encapsulated in a GRE packet, and wherein the AC information comprises a Differentiated Services Code Point (DSCP) field in the GRE packet header. 5. The method of claim 1 , wherein the base station determines the AC information by mapping from the QCI and UE subscription information. 6. The method of claim 1 , wherein the base station provides AC mapping information to the AP such that the AC information is mapped to the AC value based on the AC mapping information. 7. A base station, comprising:an LTE-WLAN aggregation (LWA) configurator that provides LWA configuration for a user equipment (UE) in a wireless network, wherein the UE is connected with both the base station and an LWA-enabled access point (AP); a radio bearer handler that establishes a data radio bearer (DRB) with the UE, wherein the DRB corresponds to an evolved packet system (EPS) bearer associated with a QoS Class Identifier (QCI); an access category (AC) configurator that determines AC information based on the QCI; and a transmitter that transmits a data packet carrying the AC information and a protocol data unit (PDU) to the to the UE via the LWA-enabled AP over an LWA Wi-Fi link, wherein the PDU is to be transmitted to the UE using an AC value determined based on the AC information, and wherein the base station appends a special LWA header comprising the AC information to the data packet. 8. The base station of claim 7 , wherein the base station and the AP are connected via a virtual local area network (VLAN), and wherein the data packet is an Ethernet frame having a VLAN tag containing the AC information. 9. The base station of claim 8 , wherein the AC information comprises a Priority Code Point (PCP) field contained in the VLAN tag. 10. The base station of claim 7 , wherein the PDU is encapsulated in a GRE packet, and wherein the AC information comprises a Differentiated Services Code Point (DSCP) field in the GRE packet header. 11. The base station of claim 7 , wherein the base station determines the AC information by mapping from the QCI and UE subscription information. 12. The base station of claim 7 , wherein the base station provides AC mapping information to the AP such that the AC information is mapped to the AC value based on the AC mapping information. 13. A method comprising:establishing a connection by an access point (AP) with a user equipment (UE) in a wireless network, wherein the UE is connected with both a base station and the AP for LTE-WLAN aggregation (LWA); receiving a data packet from the base station over an LWA Wi-Fi link, wherein the data packet comprises a protocol data unit (PDU) and access category (AC) information, and wherein the data packet has a special LWA header comprising the AC information; mapping the AC information to an AC value based on AC mapping information; and performing a channel contention procedure using the AC value and transmitting the PDU to the UE upon winning the channel contention. 14. The method of claim 13 , wherein the data packet is an Ethernet frame, and wherein the AC information comprises a Priority Code Point (PCP) field contained in a VLAN tag of the Ethernet frame. 15. The method of claim 13 , wherein the data packet is a GRE packet, and wherein the AC information comprises a Differentiated Services Code Point (DSCP) field in the GRE packet header. 16. The method of claim 13 , wherein the AP is provisioned with a set of packet filters and associated rules for mapping the AC information. 17. The method of claim 13 , wherein the AP applies a default AC value for LTE PDUs. 18. The method of claim 13 , wherein the data packet contains a special LWA header that carries the AC information. 19. The method of claim 13 , wherein the AP receives the AC mapping information from the base station.
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