Channel configuration and channel search method and communication device
A technology for controlling channels and configuration methods, which is applied in transmission path sub-channel allocation, wireless communication, signaling allocation, etc., and can solve problems such as performance gain reduction and coding rate increase
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no. 1 example Embodiment
[0148] In a first example embodiment, the number of alternatives on aggregation level 1 in the UE-specific search space is reduced. The DCI payload size of the new DCI monitoring format is larger than the DCI payload size of the existing DCI monitoring format. While the length of DCI information becomes larger, it requires higher SNR to obtain the same coding performance. For the above reasons, the number of alternatives at aggregation level 1 can be reduced to reduce the number of blind decoding attempts. Throughout this disclosure, aggregation level 1 refers to PDCCH format 0, where DCI is encoded into 1 CCE; aggregation level 2 refers to PDCCH format 1, where DCI is encoded into 2 CCEs; aggregation level 4 refers to PDCCH format 2, where DCI is encoded into 4 CCEs; aggregation level 8 refers to PDCCH format 3, where DCI is encoded into 8 CCEs. In addition, aggregation level 1, aggregation level 2, aggregation level 4, and aggregation level 8 may also be referred to as fir...
no. 2 example Embodiment
[0153] In a second exemplary embodiment, at least one of the number of alternatives on aggregation level 2 or aggregation level 4 or aggregation level 8 in the UE-specific search space is increased. In other words, the number of candidates at aggregation level 2, aggregation level 4, and aggregation level 8 in the UE-specific search space can all be increased. Since aggregation level 1 will introduce a higher error rate, try to reduce the number of alternatives on aggregation level 1. However, reducing the number of monitoring UE-specific search spaces on aggregation level 1 will increase the probability of DCI blocking for new format control information. Therefore, other methods need to be adopted to reduce the probability of DCI blocking.
[0154] To reduce the blocking probability, UE-specific search spaces other than aggregation level 1 can be expanded. These extensions can be shown in Table 6 below, where N BD Maximum number of PDCCH candidates for new format DCI (e.g....
no. 3 example Embodiment
[0165] In the third exemplary embodiment, it is proposed to extend the UE-specific search space except aggregation level 1. It can also be extended to form new PDCCH formats on another (or additional) aggregation level. In the third exemplary embodiment, the extended UE-specific search space is defined in Table 8, where N BD is the maximum number of PDCCH candidates for the new monitoring format DCI (e.g., N BD = 16), a is the number of PDCCH candidates of aggregation level 1 (marked as 1 in Table 8 1 ), b is the number of PDCCH candidates of aggregation level 2 (marked as 1 in Table 8 2 ), c is the number of PDCCH candidates of aggregation level 4 (marked as 1 in Table 8 3 ), d is the number of PDCCH candidates of aggregation level 8 (marked as 1 in Table 8 4 ), and e is the aggregation level l 5 The number of PDCCH alternatives (marked as 1 in Table 8 5 ). The initial point of the PDCCH candidates can be derived from any hash function, for example from the hash functi...
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