SELECTING BETWEEN NORMAL AND VIRTUAL DUAL LAYER ACK/NACK
An allocation of downlink resources is received, which are monitored on l layers for data. A resource-specific bit (ACK/NACK) is generated for each of those resources. From a pattern of those resources is selected an algorithm from among a first algorithm that bundles them in a first mode and a second algorithm that bundles them in a second mode. The selected algorithm is used on the generated resource-specific bits that correspond to the downlink resources, bundled according to the selected mode, to generate l reply bits which are then transmitted. At the network side a NACK reply bit is received, based on a pattern of the allocated downlink resources, a first algorithm that bundles them in a first mode or a second algorithm that bundles them in a second mode is selected. A bundling window and layer combination are determined from the selected algorithm, which gives the resource for retransmitting the NACK'd data.
1 . A method comprising:
receiving an allocation of downlink resources and monitoring the allocated downlink resources on l layers for data, in which l is an integer;
generating a resource-specific bit for each of the respectively monitored allocated downlink resources;
based on a pattern of the allocated downlink resources, selecting from among at least a first algorithm that bundles the downlink resources in a first mode and a second algorithm that bundles the downlink resources in a second mode;
using the selected first or second algorithm on the generated resource-specific bits that correspond to the downlink resources as bundled according to the respective first or second mode to generate l reply bits; and
transmitting the generated l reply bits.