You got 99% of the usages of 随着!
1 - 随着|通信市场'的|日益成熟(noun)
Along with | telecommunication market's | gradual maturity (noun)
2 - 随着|通信市场|日益|成熟
While | telecommunication market | gradually matures (Intransitive verb here in Chinese)
3 - 随着通信市场地(WRONG USAGE of 地 here, adverb only)日益成熟