A method of wireless communication, comprising: grouping subframes of a time division duplex, TDD, configuration of a serving cell into a set of anchor subframes from one of: designating one or more downlink subframes of the serving cell as an anchor subframe when corresponding subframes of the serving cell and a neighboring cell are downlink subframes, OR designating, as anchor subframes, one or more downlink subframes of the serving cell that are fixed in the downlink direction, OR designating one or more special subframes of the serving cell as an anchor subframe when corresponding subframes of the serving cell and the neighboring cell are special subframes; and a set of non-anchor subframes from one of: designating one or more downlink subframes of the serving cell as a non-anchor frame when corresponding subframes of the serving cell and the neighboring cell comprise a downlink subframe in the serving cell and an uplink subframe in the neighboring cell, OR designating, as non-anchor subframes, one or more downlink subframes of the serving cell that are not fixed in the downlink direction; and separately bundling positive acknowledgements, ACKs, and/or negative acknowledgements, NACKs, of the anchor subframes, and ACKs and/or NACKs of the non-anchor subframes. grouping subframes of a time division duplex, TDD, configuration of a serving cell into a set of anchor subframes from one of: designating one or more downlink subframes of the serving cell as an anchor subframe when corresponding subframes of the serving cell and a neighboring cell are downlink subframes, OR designating, as anchor subframes, one or more downlink subframes of the serving cell that are fixed in the downlink direction, OR designating one or more special subframes of the serving cell as an anchor subframe when corresponding subframes of the serving cell and the neighboring cell are special subframes; and a set of non-anchor subframes from one of: designating one or more downlink subframes of the serving cell as a non-anchor frame when corresponding subframes of the serving cell and the neighboring cell comprise a downlink subframe in the serving cell and an uplink subframe in the neighboring cell, OR designating, as non-anchor subframes, one or more downlink subframes of the serving cell that are not fixed in the downlink direction; and designating one or more downlink subframes of the serving cell as an anchor subframe when corresponding subframes of the serving cell and a neighboring cell are downlink subframes, OR designating, as anchor subframes, one or more downlink subframes of the serving cell that are fixed in the downlink direction, OR designating one or more special subframes of the serving cell as an anchor subframe when corresponding subframes of the serving cell and the neighboring cell are special subframes; and a set of non-anchor subframes from one of: designating one or more downlink subframes of the serving cell as a non-anchor frame when corresponding subframes of the serving cell and the neighboring cell comprise a downlink subframe in the serving cell and an uplink subframe in the neighboring cell, OR designating, as non-anchor subframes, one or more downlink subframes of the serving cell that are not fixed in the downlink direction; and designating one or more downlink subframes of the serving cell as a non-anchor frame when corresponding subframes of the serving cell and the neighboring cell comprise a downlink subframe in the serving cell and an uplink subframe in the neighboring cell, OR designating, as non-anchor subframes, one or more downlink subframes of the serving cell that are not fixed in the downlink direction; and separately bundling positive acknowledgements, ACKs, and/or negative acknowledgements, NACKs, of the anchor subframes, and ACKs and/or NACKs of the non-anchor subframes.