{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8462877","patent":{"patent_number":"US-8462877","title":"Method and apparatus for transmitting/receiving MBMS based on hm","assignee":null,"inventors":[],"filing_date":"2009-09-10T00:00:00.000Z","publication_date":"2013-06-11T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L","H04L"],"num_claims":24,"abstract":"The present invention relates to a method and apparatus for transmitting/receiving multimedia broadcast/multicast data. The method includes the steps of: receiving a check report returned from a receiver, determining whether the check report indicates there are both basic layer and enhanced layer data errors and if yes, exchanging the last two bits of the enhanced layer and the first two bits of the basic layer and modulating the data with a second constellation map and then transmitting the data; otherwise determining whether the check report indicates there is only the basic layer error, and modulating and transmitting the data according to the result of determination. The beneficial effects of the present invention are that the retransmission efficiency can be improved and the ratio of receiving the data correctly by the users at the cell center and at the cell border during the first retransmission is improved."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for transmitting/receiving MBMS based on hm","description":"The present invention relates to a method and apparatus for transmitting/receiving multimedia broadcast/multicast data. The method includes the steps of: receiving a check report returned from a recei","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8462877","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-8462877","citation_suggestion":"Patentable. \"Method and apparatus for transmitting/receiving MBMS based on hm\" (US-8462877). https://patentable.app/patents/US-8462877","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8462877","json":"https://patentable.app/api/llm-context/US-8462877","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T07:47:43.228Z"}