Abstract:
A communication node determines that radio link failure occurred during connected state mobility of an access terminal and reports the radio link failure to another communication node. For example, a target access point may determine that radio link failure occurred during handover of an access terminal and send a radio link failure report message to the access point that was previously serving the access terminal or to some other node (e.g., a network node). In the first case, the serving access point may adjust mobility parameters based on this radio link failure information and, optionally, other reported radio link failure information. In the second case, the other node may send a radio link failure report message to the serving access point, or the other node may adjust mobility parameters based on this radio link failure information (and, optionally, other reported radio link failure information) and send the adjusted mobility parameters to the serving access point.
Abstract:
Systems and methodologies are described that facilitate performing intra-cluster and inter-cluster reselection for relay eNBs. In intra-cluster reselection, a relay eNB can reselect a disparate relay eNB and indicate its identifier in a bearer list update message. The disparate relay eNB and upstream eNBs (including the donor eNB) can update routing tables based at least in part on the identifier. In addition, the relay eNB can provide identifiers of downstream relay eNBs to facilitate updating routing tables for those identifiers as well. In an inter-cluster reselection, relay eNBs can release connection to downstream relay eNBs and re-attach to a wireless network to receive an identifier from a new donor eNB in the new cluster. Alternatively, the relay eNB can request an identifier from the donor eNB during reselection, notify downstream relay eNBs of the reselection, and/or request identifiers for one or more downstream relay eNBs.
Abstract:
Systems and methodologies are described that facilitate applying offsets and/or selectable hysteresis values to favor access points in cell reselection. In measuring and ranking surrounding access points in reselection, offsets can be applied to favorable access points to facilitate cell reselection thereto. The offset can positively affect measurements, and thus ranking as well, in some cases. Negative offsets can also be applied to lower measurements (and thus ranking) of some access points. Moreover, hysteresis values can be applied in measuring current cells to prevent frequent reselection. The hysteresis values can be selected based on a type of the current cell or related access point to expand the coverage area where desired. Thus, where the current access point is favorable, a larger hysteresis can be added to measurements related to the current access point.
Abstract:
Systems and methodologies are described that facilitate attaching cell relays to a wireless network. During the attachment procedure, a relay eNB can request assignment of an identifier, or a portion thereof, from a donor eNB for subsequent packet routing to the relay eNB. This can occur through one or more intermediary relay eNBs, where present. Donor eNB can assign an identifier or portion thereof (or confirm/deny an explicit identifier request from the relay eNB) and can forward establishment information downstream to the relay eNB. Donor eNB and intermediary relay eNBs, where present, can store the identifier for subsequent use in routing packets to the relay eNB. The identifier can be a terminal endpoint identifier (TEID) utilized in a tunneling protocol, a relay identifier utilized in a relay protocol, and/or the like.
Abstract:
Systems and methodologies are described that facilitate packet routing among relay eNBs in a wireless network. A donor eNB can create at least a portion of a tunnel endpoint identifier (TEID) for a relay eNB communicating with a UE or other device. In addition, the relay eNB communicating with the UE can create a portion of the TEID. Upon receiving packets with a TEID, the donor eNB can route the packets to downstream eNBs based on the portion of the TEID that it created. Other downstream eNBs can continue to route packets to next hop eNBs based on the portion of the TEID created by the donor eNB or the downstream eNBs themselves. The relay eNB communicating with the UE can route packets to the UE based on the portion of the TEID it created and/or the portion created by the donor eNB.
Abstract:
Apparatus and methods for determining a location estimate of a mobile device based on an extended set of assistance data are presented. The extended assistance data includes assistance data for base stations, such as cellular base stations and access points, not expected to be viewable by the mobile device in a (current) first geographical area but expected to be viewable by the mobile device in a (future) second geographical area. By seeding the mobile device with assistance data expected to be useful in the future, the network reduces messaging between the network and mobile device and battery consumption by the mobile device.
Abstract:
The number of handover-related failures that occur in a communication system may be reduced by taking target access point conditions into account when declaring radio link failure and/or by delaying certain handover operations. In some aspects, criteria for radio link failure detection and access terminal-controlled mobility may take into account access point parameters related to neighboring cells that may be available as mobility targets. For example, filtering mechanisms for detecting radio link failure based on radio layer problem reports may also take into account the availability of various neighbor access points and their measured signal strengths. In addition, a handover command may be sent earlier than in conventional systems (e.g., the handover command may be sent even though the target access point is weaker than the source access point) and include an indication that instructs the access terminal to delay handover until a specified condition is met. For example, handover may be delayed until the target access point becomes stronger than the source access point.
Abstract:
Systems and methodologies are described that facilitate mapping multiple evolved packet system (EPS) bearers to a single relay eNB radio bearer. In particular, an upstream eNB can select a radio bearer of a downstream eNB for association to an EPS bearer; the selection can be based on a best effort match or substantially any logic. The upstream eNB can store an association between the radio bearer and EPS bearer for subsequent downstream packet routing. The upstream eNB can also provide an indication of the selected radio bearer to the downstream relay eNB to facilitate upstream packet routing therefrom. The upstream eNB can alternatively select the radio bearer of the downstream eNB for association to the EPS bearer based on a quality of service (QoS) class identifier (QCI) of the EPS bearer.
Abstract:
Systems and methodologies are described that facilitate assigning TEIDs, or portions thereof, to UEs or other devices during network attachment and/or dedicated bearer activation using one or more cell relays. Relay eNBs can request bearer establishment from a UE, which can be based on receiving an attach accept from an upstream node during attachment for the UE, receiving a bearer setup request from the upstream node, and/or the like. Once a bearer establishment response is received from the UE, the relay eNBs can store a TEID relating to the bearer. This can be a TEID that is at least partially received in the attach accept or bearer setup message, generated for the UE upon receiving the bearer establishment response, and/or the like. The TEID, or portion thereof, can be utilized for subsequent packet routing to the UE through one or more cell relays.
Abstract:
Certain aspects of the present disclosure provide a technique for pre-bundling the received service data units (SDU) into an SDU bundle in a first communication layer before receiving a scheduling information from a second communication layer and adjusting the SDU bundle when the scheduling information is received.