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1. US20140133369 - Method and apparatus for operation with carrier aggregation of time division duplex cells

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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Claims

1. A method in a half-duplex capable wireless device operating in a wireless communication network, said method comprising:
operating in a Time Division Duplex (TDD) mode having a carrier aggregation configuration that includes a primary cell and a secondary cell having different Uplink/Downlink (UL/DL) configurations;
identifying a normal downlink subframe in the secondary cell as having a first portion overlapped by a downlink portion of a special subframe in the primary cell and a second portion overlapped by an uplink portion of the special subframe; and
adapting reception for the normal downlink subframe in the secondary cell, based on treating the normal downlink subframe as an abbreviated downlink subframe having all user or control data targeted to the wireless device only within the first portion, including limiting the reception of user or control data to the first portion of the normal downlink subframe, and assuming that transmission parameters for the transmission of the user or control data were set based on a length and position of the first portion of the normal downlink subframe, rather than based on a full length of the normal downlink subframe.
2. The method of claim 1, wherein the special subframe and the normal downlink subframe comprise subframes on primary and secondary LTE carriers in the primary and secondary cells, respectively.
3. The method of claim 1, wherein limiting the reception of user data or control data to the first portion of the normal downlink subframe comprises at least temporarily switching from enhanced Physical Downlink Control Channel (ePDCCH) monitoring to Physical Downlink Control Channel (PDCCH) monitoring.
4. The method of claim 1, wherein the one or more transmission parameters include one or more of the following: a transport block size, a modulation and coding scheme, and which Orthogonal Frequency Division Multiplex (OFDM) resource elements are used within the normal downlink subframe.
5. The method of claim 1, wherein adapting the reception for the normal downlink subframe in the secondary cell further comprises treating the normal downlink subframe as if it were a special downlink subframe in the secondary cell, including assuming a special subframe configuration that corresponds to that used for special subframes in the primary or secondary cell, or according to a predefined pattern or rule.
6. The method of claim 1, wherein adapting the reception for the normal downlink subframe in the secondary cell further comprises assuming that the transmission of any Demodulation Reference Symbols (DMRS) for the wireless device in the normal downlink subframe fall within the first portion of the normal downlink subframe, according to a DMRS transmission pattern used for the special subframe in the primary cell or used for special subframes in the secondary cell, or according to a predefined pattern or rule.
7. A half-duplex capable wireless device configured for operation in a wireless communication network, said wireless device comprising:
a communication interface configured to receive signals from the wireless communication network and to transmit signals to the wireless communication network; and
a processing circuit that is operatively associated with the communication interface and, for the case where the wireless device operates in a Time Division Duplex (TDD) mode having a carrier aggregation configuration that includes a primary cell and a secondary cell of the wireless communication network having different Uplink/Downlink (UL/DL) configurations, is configured to:
identify a normal downlink subframe in the secondary cell as having a first portion overlapped by a downlink portion of a special subframe in the primary cell and a second portion overlapped by an uplink portion of the special subframe; and
adapt reception for the normal downlink subframe in the secondary cell, based on treating the normal downlink subframe as an abbreviated downlink subframe having all user or control data targeted to the wireless device only within the first portion, including limiting the reception of user or control data to the first portion of the normal downlink subframe, and assuming that transmission parameters for the transmission of the user or control data were set based on a length and position of the first portion of the normal downlink subframe, rather than based on a full length of the normal downlink subframe.
8. The wireless device of claim 7, wherein the processing circuit is configured to adapt reception for the normal downlink subframe based on at least temporarily switching from enhanced Physical Downlink Control Channel (ePDCCH) monitoring to Physical Downlink Control Channel (PDCCH) monitoring.
9. The wireless device of claim 7, wherein the one or more transmission parameters include one or more of the following: a transport block size, a modulation and coding scheme, and which Orthogonal Frequency Division Multiplex (OFDM) resource elements are used within the normal downlink subframe.
10. The wireless device of claim 7, wherein the processing circuit is configured to adapt reception for the normal downlink subframe in the secondary cell further based on treating the normal downlink subframe as if it were a special downlink subframe in the secondary cell, including assuming a special subframe configuration that corresponds to that used for special subframes in the primary or secondary cell, or according to a predefined pattern or rule.
11. The wireless device of claim 7, wherein the processing circuit is configured to adapt reception for the normal downlink subframe in the secondary cell further based on assuming that the transmission of any Demodulation Reference Symbols (DMRS) for the wireless device in the normal downlink subframe fall within the first portion of the normal downlink subframe, according to a DMRS transmission pattern used for the special subframe in the primary cell or used for special subframes in the secondary cell, or according to a predefined pattern or rule.