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1. A link failure recovery method, comprising: sending first request information on a first resource, wherein the first request information indicates that a link of at least two of L cells fail, and L is an integer greater than 1; and sending second request information on a second resource, wherein the second request information indicates cell information of M cells whose links fail and that are in the L cells, M≥2, and M is an integer; wherein the cell information of the M cells comprises cell identities of the M cells or N pieces of first reference signal information used to recover the M cells, N≥2, and N is an integer; wherein the method further comprises: detecting response information of the M cells; and sending third request information, wherein when no response information of an ith cell in the M cells is detected, the third request information indicates a cell identity of the ith cell or second reference signal information used to recover the ith cell, i is a positive integer, and 1≤i≤M; and when response information of a jth cell in the M cells is detected, the third request information further indicates confirm information of the jth cell, j is a positive integer, 1≤i≤M, and i is not equal to j: or sending the third request information, wherein when no response information of the ith cell in the M cells is detected, the third request information indicates the cell identity of the ith cell or the second reference signal information used to recover the ith cell, i is a positive integer, and 1≤i≤M; or when the response information of the jth cell in the M cells is detected, the third request information is used to indicate the confirm information of the jth cell, j is a positive integer, 1≤j≤M, and i=j.
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