Method for transmitting and updating system information in a legacy support system

{
  "publication_number": "US2011014877A1",
  "country": "US",
  "kind": "A1",
  "title": "Method for transmitting and updating system information in a legacy support system",
  "abstract": "A method for transmitting and updating system information in a system that supports a legacy mobile station is disclosed. A method for transmitting system information according to one embodiment of the present invention comprises transmitting a super-map through a new zone of a super-frame, the super-map including channel description transmission control information indicating a channel descriptor of a legacy zone; and transmitting the channel descriptor and a map message through the legacy zone, the map message indicating the channel descriptor.",
  "claims": [
    "1. A method for transmitting system information to a new mobile station in a system that supports a legacy mobile station, the method comprising: transmitting a super-map through a new zone of a super-frame, the super-map including channel description transmission control information indicating a channel descriptor of a legacy zone; and transmitting the channel descriptor and a map message through the legacy zone, the map message indicating the channel descriptor, wherein the channel description transmission control information includes at least one of a configuration change count and a change bit which indicates whether the channel descriptor has been changed. 2. The method of claim 1, wherein the channel description transmission control information includes a field for at least one of a starting sub-frame in which the channel descriptor is transmitted, a starting radio block, and a number of radio blocks allocated to the channel descriptor. 3. The method of claim 1, wherein the channel description transmission control information includes separate fields indicating a DCD message and a UCD message included in the legacy zone, respectively. 4. The method of claim 1, wherein the channel description transmission control information includes a field indicating a repetition coding scheme or a coding scheme of the DCD message and the UCD message included in the legacy zone. 5. A method for updating system information in a new mobile station of a system that supports a legacy mobile station, the method comprising: receiving channel description transmission control information through a super-map included in a new zone of a super-frame, the channel description transmission control information including a configuration change count indicating whether a channel descriptor of a legacy zone has been changed; and decoding the channel descriptor in the legacy zone, if the configuration change count indicates that the channel descriptor has been changed. 6. The method of claim 5, further comprising applying the channel descriptor to system information of the new mobile station, if at least one of a UCD count or a DCD count is received through a map message of the legacy zone or the new zone. 7. The method of claim 5, wherein the channel description transmission control information includes a field for at least one of a starting sub-frame within which the channel descriptor is transmitted, a starting radio block, and a number of radio blocks allocated to the channel descriptor. 8. The method of claim 5, wherein the channel description transmission control information includes a field indicating a repetition coding scheme or a coding scheme of the DCD message and the UCD message of the legacy zone. 9. A method for updating system information in a new mobile station of a system that supports a legacy mobile station, the method comprising: receiving channel description transmission control information through a super-map included in a new zone of a super-frame, the channel description transmission control information including a change bit indicating in a toggle mode whether a channel descriptor of a legacy zone has been changed; and decoding the channel descriptor in the legacy zone, if the change bit indicates that the channel descriptor has been changed. 10. The method of claim 9, wherein the channel description transmission control information includes a field for at least one of a starting sub-frame within which the channel descriptor is transmitted, a starting radio block, and a number of radio blocks allocated to the channel descriptor. 11. The method of claim 9, wherein the channel description transmission control information includes a field indicating a repetition coding scheme or a coding scheme of the DCD message and the UCD message of the legacy zone."
  ],
  "description_excerpt": "The present invention relates to a wireless access system, and more particularly to, a method for efficiently updating system information in a new mobile station when a base station supports a legacy mobile station in a wireless access system.\n\nFIG. 1A is a diagram illustrating an update procedure of an uplink channel descriptor (UCD) according to the related art.\n\nIt is assumed that UL-MAP is transmitted per frame in a state that a frame duration period is 20 ms, and a UCD transmission interval is 10 s. Also, a mobile station has already received UCD of which configuration change count is “i”. A base station transmits UL-MAP, of which a UCD count is “i,” per 20 ms (S 101, S 102). The base station retransmits the UCD message, of which the configuration change count is “i,” at the time when the UCD message will be transmitted (S 103). The mobile station which has received the UCD message decodes the corresponding message and then compares a configuration change count included in its own UCD with the configuration change count of the newly received UCD. If the configuration change counts are identical with each other, the mobile station ignores system information included in the newly received message (S 104). The base station continues to transmit UL-MAP, of which the UCD count is “i,” per 20 ms (S 105). If the system information has been changed (S 106), the base station transmits a configuration change count “i+1” and the changed UCD message at a corresponding transmission time (S 107).",
  "cpc": [
    "H04W 48/08",
    "H04L 5/0007",
    "H04W 24/02"
  ],
  "ipc": [
    "H04B 7/005",
    "H04B 17/00"
  ],
  "inventors": [
    "Hee Jeong CHO",
    "Ki Seon Ryu"
  ],
  "filing_date": "2009-04-06",
  "publication_date": "2011-01-20",
  "priority_date": "2008-04-04",
  "application_number": "US-92058609-A",
  "family_id": "41135748",
  "cited_by_count": 5,
  "citations": [
    "US5953320A",
    "US6201969B1",
    "US7155223B2",
    "US7693520B2",
    "US7702289B2",
    "US20070037576A1",
    "US20070058523A1",
    "US20100046464A1",
    "US20090005052A1",
    "US20090067377A1",
    "US20100278123A1",
    "US20090149179A1",
    "US20110019622A1"
  ]
}