# US 2006/0189352 A1 · Base station and radio terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2006/0189352 A1 - Document ID: US20060189352A1 - Status: Published application - Kind: A1 - Application number: 10/551,701 - Filed: 2004-05-14 - Published: 2006-08-24 - Earliest claimed: 2003-05-16 - Assignees: Mitsubishi Electric Corporation - Inventors: Yukimasa Nagai; Hiroyoshi Suga - Web page: https://patentgrep.com/patent/US20060189352A1 ## CPC - H04W 28/16: Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service] - H04W 74/08: Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A base station for a wireless LAN system has physical layers corresponding to channels, and a MAC layer. The physical layers each transmits and receives a radio signal conforming to an IEEE 802.11 standard using a corresponding channel. When transmitting, the MAC layer divides an entire data frame conforming to the standard from a head of the data frame, in accordance with a transmission rate of each physical layer, and allots the divided data frame to the physical layers so that burst times of the channels are substantially equal. When receiving, the MAC layer combines data frames received via channels through operations opposite to those performed when transmitting. ## Claims ### Claim at position 1 1-36. (canceled) ### Claim 37 A base station for a wireless LAN system realizing band-widening using a plurality of communication channels, the base station comprising: a plurality of physical layers corresponding to the plurality of communication channels, and each that transmits and receives a radio signal conforming to an IEEE 802.11 standard using a corresponding communication channel; and a media access control (hereinafter, “MAC”) layer, when transmitting, that divides an entire data frame conforming to the IEEE 802.11 standard from a head of the data frame, in accordance with a transmission rate of each physical layer, and allots the divided data frame to the physical layers so that burst times of the communications channels are substantially equal, and when receiving, that combines data frames received via a plurality of communication channels through operations opposite to those performed when transmitting. ### Claim 38 (depends on 37) The base station according to claim 37, further comprising: a determining unit that determines the transmission rate of each communication channel, a frame allotment ratio between the communication channels, and a transmission data amount in each communication channel, for the MAC layer to carry out the allotment and the combination corresponding to the plurality of communication channels. ### Claim 39 (depends on 37) The base station according to claim 37, further comprising: a protocol control unit conforming to an IEEE 802.11 standard and using a carrier sense multiple access/collision avoidance (CSMA/CA) protocol. ### Claim 40 (depends on 37) The base station according to claim 37, wherein for transmission, a frame having a frame length shorter than that of the data frame is not divided and the same frame having a same rate is transmitted to each communication channel, and for reception, if one frame having a frame length shorter than that of the data frame is received normally, the received one frame is recognized as a frame transmitted from a transmission side. ### Claim 41 (depends on 37) The base station according to claim 37, wherein if a number of communication channels used is one, the division and the combination are not carried out, and the physical layer corresponding to the used communication terminal transmits and receives the radio signal conforming to the IEEE 802.11 standard. ### Claim 42 (depends on 37) The base station according to claim 37, wherein equal frames are allowed to be transmitted simultaneously using the plurality of communication channels. ### Claim 43 (depends on 37) The base station according to claim 37, further comprising: a protocol control unit conforming to an IEEE 802.11 standard and using a polling control. ### Claim 44 (depends on 37) The base station according to claim 37, wherein the plurality of communication channels are selectable according to a frequency, a space, or a combination of the frequency and the space. ### Claim 45 (depends on 37) The base station according to claim 37, wherein if the plurality of communication channels are used, a division number, a total number of divisions, a Pad insertion method, and information indicating whether a same frame is copied for the plurality of communication channels are included in the data frame. ### Claim 46 A base station for a wireless LAN system realizing band-widening using a plurality of communication channels, the base station comprising: a plurality of physical layers corresponding to the plurality of communication channels, and each that transmits and receives a radio signal conforming to an IEEE 802.11 standard using a corresponding communication channel; and a media access control (hereinafter, “MAC”) layer, when transmitting, that divides a part of a data frame conforming to the IEEE 802.11 standard from a head of the part of the data frame, in accordance with a transmission rate of each physical layer, and allots the divided part of the data frame to the physical layers so that burst times of the communications channels are substantially equal, and when receiving, that combines data frames received via a plurality of communication channels through operations opposite to those performed when transmitting. ### Claim 47 (depends on 46) The base station according to claim 46, further comprising: a determining unit that determines the transmission rate of each communication channel, a frame allotment ratio between the communication channels, and a transmission data amount in each communication channel, for the MAC layer to carry out the allotment and the combination corresponding to the plurality of communication channels. ### Claim 48 (depends on 46) The base station according to claim 46, further comprising: a protocol control unit conforming to an IEEE 802.11 standard and using a carrier sense multiple access/collision avoidance (CSMA/CA) protocol. ### Claim 49 (depends on 46) The base station according to claim 46, wherein for transmission, a frame having a frame length shorter than that of the data frame is not divided and the same frame having a same rate is transmitted to each communication channel, and for reception, if one frame having a frame length shorter than that of the data frame is received normally, the received one frame is recognized as a frame transmitted from a transmission side. ### Claim 50 (depends on 46) The base station according to claim 46, wherein if a number of communication channels used is one, the division and the combination are not carried out, and the physical layer corresponding to the used communication terminal transmits and receives the radio signal conforming to the IEEE 802.11 standard. ### Claim 51 (depends on 46) The base station according to claim 46, wherein equal frames are allowed to be transmitted simultaneously using the plurality of communication channels. ### Claim 52 (depends on 46) The base station according to claim 46, further comprising: a protocol control unit conforming to an IEEE 802.11 standard and using a polling control. ### Claim 53 (depends on 46) The base station according to claim 46, wherein the plurality of communication channels are selectable according to a frequency, a space, or a combination of the frequency and the space. ### Claim 54 (depends on 46) The base station according to claim 46, wherein if the plurality of communication channels are used, a division number, a total number of divisions, a Pad insertion method, and information indicating whether a same frame is copied for the plurality of communication channels are included in the data frame. ### Claim 55 A radio terminal for a wireless LAN system realizing band-widening using a plurality of communication channels, the base station comprising: a plurality of physical layers corresponding to the plurality of communication channels, and each that transmits and receives a radio signal conforming to an IEEE 802.11 standard using a corresponding communication channel; and a media access control (hereinafter, “MAC”) layer, when transmitting, that divides an entire data frame conforming to the IEEE 802.11 standard from a head of the data frame, in accordance with a transmission rate of each physical layer, and allots the divided data frame to the physical layers so that burst times of the communications channels are substantially equal, and when receiving, that combines data frames received via a plurality of communication channels through operations opposite to those performed when transmitting. ### Claim 56 (depends on 55) The radio terminal according to claim 55, further comprising: a determining unit that determines the transmission rate of each communication channel, a frame allotment ratio between the communication channels, and a transmission data amount in each communication channel, for the MAC layer to carry out the allotment and the combination corresponding to the plurality of communication channels. ### Claim 57 (depends on 55) The radio terminal according to claim 55, further comprising: a protocol control unit conforming to an IEEE 802.11 standard and using a carrier sense multiple access/collision avoidance (CSMA/CA) protocol. ### Claim 58 (depends on 55) The radio terminal according to claim 55, wherein for transmission, a frame having a frame length shorter than that of the data frame is not divided and the same frame having a same rate is transmitted to each communication channel, and for reception, if one frame having a frame length shorter than that of the data frame is received normally, the received one frame is recognized as a frame transmitted from a transmission side. ### Claim 59 (depends on 55) The radio terminal according to claim 55, wherein if a number of communication channels used is one, the division and the combination are not carried out, and the physical layer corresponding to the used communication terminal transmits and receives the radio signal conforming to the IEEE 802.11 standard. ### Claim 60 (depends on 55) The radio terminal according to claim 55, wherein equal frames are allowed to be transmitted simultaneously using the plurality of communication channels. ### Claim 61 (depends on 55) The radio terminal according to claim 55, further comprising: a protocol control unit conforming to an IEEE 802.11 standard and using a polling control. ### Claim 62 (depends on 55) The radio terminal according to claim 55, wherein the plurality of communication channels are selectable according to a frequency, a space, or a combination of the frequency and the space. ### Claim 63 (depends on 55) The radio terminal according to claim 55, wherein if the plurality of communication channels are used, a division number, a total number of divisions, a Pad insertion method, and information indicating whether a same frame is copied for the plurality of communication channels are included in the data frame. ### Claim 64 A radio terminal for a wireless LAN system realizing band-widening using a plurality of communication channels, the base station comprising: a plurality of physical layers corresponding to the plurality of communication channels, and each that transmits and receives a radio signal conforming to an IEEE 802.11 standard using a corresponding communication channel; and a media access control (hereinafter, “MAC”) layer, when transmitting, that divides a part of a data frame conforming to the IEEE 802.11 standard from a head of the part of the data frame, in accordance with a transmission rate of each physical layer, and allots the divided part of the data frame to the physical layers so that burst times of the communications channels are substantially equal, and when receiving, that combines data frames received via a plurality of communication channels through operations opposite to those performed when transmitting. ### Claim 65 (depends on 64) The radio terminal according to claim 64, further comprising: a determining unit that determines the transmission rate of each communication channel, a frame allotment ratio between the communication channels, and a transmission data amount in each communication channel, for the MAC layer to carry out the allotment and the combination corresponding to the plurality of communication channels. ### Claim 66 (depends on 64) The radio terminal according to claim 64, further comprising: a protocol control unit conforming to an IEEE 802.11 standard and using a carrier sense multiple access/collision avoidance (CSMA/CA) protocol. ### Claim 67 (depends on 64) The radio terminal according to claim 64, wherein for transmission, a frame having a frame length shorter than that of the data frame is not divided and the same frame having a same rate is transmitted to each communication channel, and for reception, if one frame having a frame length shorter than that of the data frame is received normally, the received one frame is recognized as a frame transmitted from a transmission side. ### Claim 68 (depends on 64) The radio terminal according to claim 64, wherein if a number of communication channels used is one, the division and the combination are not carried out, and the physical layer corresponding to the used communication terminal transmits and receives the radio signal conforming to the IEEE 802.11 standard. ### Claim 69 (depends on 64) The radio terminal according to claim 64, wherein equal frames are allowed to be transmitted simultaneously using the plurality of communication channels. ### Claim 70 (depends on 64) The radio terminal according to claim 64, further comprising: a protocol control unit confirming to an IEEE 802.11 standard and using a polling control. ### Claim 71 (depends on 64) The radio terminal according to claim 64, wherein the plurality of communication channels are selectable according to a frequency, a space, or a combination of the frequency and the space. ### Claim 72 (depends on 64) The radio terminal according to claim 64, wherein if the plurality of communication channels are used, a division number, a total number of divisions, a Pad insertion method, and information indicating whether a same frame is copied for the plurality of communication channels are included in the data frame.