Abstract:
A base station (20A) is configured to transmit user data to a wireless device (16A) upon a first carrier (22). The base station (20A) identifies, from a set of transmission resources that is nominally allocated for transmission of user data upon the first carrier (22), a subset of transmission resources that is also nominally allocated for transmission of a reference or control signal either by the base station (20A) upon a second carrier (24) or by a neighboring base station (20B) upon the first carrier (22). The base station (20A) selectively transmits user data to the wireless device (16A) upon the first carrier (22) exclusive of this identified subset of transmission resources. The device (16A) in some embodiments obtains information indicating that the base station (20A) is selectively transmitting user data upon the first carrier (22) exclusive of the subset in this way. Based on this information, the device (16A) recovers user data received upon the first carrier (22) exclusive of the subset of transmission resources.
Abstract:
User Equipment (700) reports single-cell or multi-cell channel state information to a base station (600) on a PUCCH Format 3 resource. The PF 3 resource selected depends on whether ACK/NACK needs to be reported simultaneously. Different coding and/or scrambling and/or Interleaving schemes are used depending on whether ACK/NACK bits are present, as well as the number of ACK/NACK and/or CSI bits. Resource compatibility is maintained independently of the details of coding, interleaving, or scrambling - that is, all formats can be orthogonally multiplexed onto the same time-frequency resources. The format used for CSI only is PUCCH Format 3c (PF 3c) whereas the PUCCH Format used for CSI and ACK/NACK is PUCCH Format 3b (PF 3b). PUCCH Formats 3b and 3c may be further differentiated depending on whether a CSI from a single or multiple cells are reported, or from which cells (PCell, SCeil) an ACK/NACK is reported. Ambiguity may be resolved by using different spreading codes for reference signals In PF 3b and 3c formats.
Abstract:
According to some embodiments, a wireless device receives (1020) a discovery burst from a network node (115). The same discovery burst includes multiple signals within at least one subframe, each of the multiple signals having one or more associated measurement functions. At least one of the multiple signals is received with multiple repetitions within the same discovery burst and two or more repetitions of the same type of signal can be combined by the wireless device. The wireless device performs (1024) at least one radio measurement based at least in part on a particular one of the signals of the discovery burst. The performed at least one radio measurement corresponds to a measurement function associated with the particular signal of the discovery burst.
Abstract:
Devices and methods for suppressing interference in inter-cell and intra* ceil network communication. First and second received signals are received at a communication device, the first and second received signals comprising, respectively, reference signais and data signais. Estimated channel vectors are calculated from the first received signals, and estimated data covanance matrices are calculated from the second received signals. A plurality of combining weight vectors are determined based on the estimated channel vectors and the estimated data covariance matrices. The second received signals are then combined with the plurality of combining weight vectors to obtain a plurality of combined signals, wherein interference in the second received signals has been suppressed in the plurality of combined signals.
Abstract:
Systems and methods for transmitting uplink control signals in a cellular communications network are disclosed. In one embodiment, a wireless device configured to operate in a cellular communications network includes a radio subsystem and a processing subsystem. The processing subsystem selects a value for at least one parameter for an uplink control channel format based on content to be transmitted in an uplink control channel transmission according to the uplink control channel format. The processing subsystem then transmits, via the radio subsystem, the content in an uplink control channel transmission according to the uplink control channel format and the value for the at least one parameter for the uplink control channel format selected based on the content.
Abstract:
Methods of operating a network node (1 100) are provided. Various embodiments may provide methods of processing enhanced phystca! downlink conirol channel, ePDCCH, information by a network node (M OO) of a radio telecommunications system. The methods may include differentiating (300) between sets of physical resource block, PRB, pairs in an ePDCCH control region when defining blind decoding candidates (Xs). Moreover, the methods may include scheduling (301) a resource for a User Equipment, UE, in response to differentiating (300) between the sets of PRB pairs. Related network nodes (1100) and UEs (1200) are also described.
Abstract:
Channel-state information and hybrid-ARQ ACK/NACK information for multiple carriers are simultaneously transmitted using a PUCCH Format 3 structure, where the hybrid-ARQ ACK/NACK bits and CSI bits are separately encoded and interleaved. In an example method, a power control offset parameter is calculated (2110) as a linear combination of at least a number N, representing a number of channel-state information bits and a number M, representing a number of hybrid-ARQ ACK/NACK bits. The method continues with the calculating (2120) of a power level for a transmission on a physical uplink control channel (PUCCH), using the power control offset parameter. In some embodiments, encoded channel-state information and hybrid- ARQ ACK/NACK bits are then transmitted (2060) according to the calculated power level. In some embodiments, the linear combination is of the form aN + bM + c, where a, b, and c are non-zero constants.
Abstract:
In one aspect, the teachings herein provide a method and apparatus for extending certain HARQ feedback procedures introduced in LTE Rel-10, which were defined for CA configurations involving TDD serving cells of the same UL/DL configuration, to the new, more complex CA configurations introduced in Rel-11, which involve the aggregation of interband TDD serving cells with differing UL/DL configurations. Such reuse enables reliant and efficient HARQ feedback signaling in LTE Rel-11, without substantially increasing the specification or implementation complexity of HARQ feedback signaling in LTE Rel-11, despite the decidedly more complex CA configurations introduced in LTE Rel-11.