Deferred revenue clearing with sales billing

Dear All,

I have a business scenario in which we claim advance amount from the customer and keep this amount in deferred revenue account.And we do sales billing on monthly basis to recognize revenue so at the time of billing we claim only that amount corresponding to service we have provided.So the business requirement is while doing billing the differed revenue account also must be cleared.Pls suggest how can i set up this.

Thanks in advance.

Regards