Abstract: A call admission control method according to the present invention includes the steps of: receiving, at a first radio controller apparatus (01), a call setting instruction for a first mobile station (01) located in a first cell (01), from a core network; and setting an access link between the first radio controller apparatus (01) and a first radio base station (01) serving the first cell (01), and setting a first radio link between the first radio base station (01) and the first mobile station (01) in the first cell (01), when a group ID of the first mobile station (01) included in the call setting instruction is determined to be managed by the first radio controller apparatus (01) as a group ID of a mobile station allowed to perform communications in the first cell (01).

Abstract: An exhaust gas purifying apparatus, including an NOx occlusion reduction catalyst (2) and a filter catalyst (3) arranged in series, is used, and the exhaust gas is allowed to flow from the NOx occlusion reduction catalyst (2) to the filter catalyst (3) in a normal flow process, and, in a recovery process for allowing exhaust gas added with a reducing agent to flow, the flow direction of the exhaust gas is reversed toward the NOx occlusion reduction catalyst (2) from the filter catalyst (3). Since the exhaust gas is heated by reaction heat of the filter catalyst (3), the NOx occlusion reduction catalyst (2) can recover from sulfur poisoning in the exhaust gas at a low temperature. Thereby, overheating of the filter catalyst (3) is prevented. Therefore, recovery from sulfur poisoning can be improved, and also deterioration and breakage of the filter catalyst can be prevented.

Abstract: A call admission control method according to the present invention includes the steps of: receiving, at a first radio controller apparatus (01), a call setting instruction for a first mobile station (01) located in a first cell (01), from a core network; and setting an access link between the first radio controller apparatus (01) and a first radio base station (01) serving the first cell (01), and setting a first radio link between the first radio base station (01) and the first mobile station (01) in the first cell (01), when a group ID of the first mobile station (01) included in the call setting instruction is determined to be managed by the first radio controller apparatus (01) as a group ID of a mobile station allowed to perform communications in the first cell (01).

Abstract: The apparatus comprises a lean burn engine, a Pd catalyst 1 placed in exhaust gas from the lean burn engine and formed by loading a high concentration of Pd in the range of 3% by weight or more on a porous oxide, and enriching means 32 for temporally making an exhaust gas atmosphere around the Pd catalyst a rich atmosphere. It is believed that NO is oxidized into NO2 on the Pd catalyst 1 in the exhaust gas in a lean atmosphere and that NO2 originally existing in the exhaust gas and NO2 generated are adsorbed on Pd. This reaction occurs at low temperatures of about 200° C. to about 300° C., and thereby NOx are stored on the Pd catalyst 1. Therefore, NOx can be reduced and purified in a low temperature range from 200° C. to 300° C. without using a NOx storage material comprising an alkaline component.

Abstract: In an exhaust gas purifying catalyst, a catalyst supporting layer is formed on a surface of a cell wall of a honeycomb base member, and a catalytic noble metal and a NOx adsorbing material are loaded on the catalyst supporting layer. The portion of the catalyst supporting layer present within a depth of 100 .mu.m constitutes at least 80% by volume relative to a total volume of the catalyst supporting layer. The catalyst maintains a high probability of contact of emissions with the NOx adsorber and the catalytic noble metal, and allows easy decomposition of the sulfuric acid salt produced by sulfur poising of the NOx adsorber, thereby ensuring reliable recovery of the NOx purifying performance.

Abstract: In an electrically heated catalyst support, when necessary, reinforcing layers are formed on the inner circumference and the outer circumference of a honeycomb body. On an end surface of the honeycomb body on the downstream side of exhaust gas, there are provided a plurality of insulating ceramic bars on the outer circumferential layer and/or the inner circumferential layer in such a manner that the insulating ceramic bars cross a non-reinforcing layer of the honeycomb body. End portions of the ceramic bars are held on the reinforcing layer by pins or a ring-shaped holding member joined to an external metallic cylinder. Due to the foregoing arrangement, telescoping of the honeycomb body in the direction of gas flow and damage of the metallic foil can be prevented without obstructing the generation of heat when electricity is supplied. Accordingly, durability of the catalyst support can be remarkably enhanced.

Abstract: An electrically heating catalytic apparatus that quickly heats catalyst to an activation temperature even when the engine is started at a low temperature below the catalyst activation temperature. The apparatus employs an electrically conductive catalyst carrier that is electrically heated. The carrier is provided with local hot spots to be energized. Since the heat is locally generated, the heat capacity of the catalyst carrier is small to shorten a temperature increasing time.

Abstract: An electrically heating catalytic apparatus that quickly heats catalyst to an activation temperature even when the engine is started at a low temperature below the catalyst activation temperature. The apparatus employs an electrically conductive catalyst carrier that is electrically heated. The carrier is provided with local hot spots to be energized. Since the heat is locally generated, the heat capacity of the catalyst carrier is small to shorten a temperature increasing time.

Abstract: The electrically heated catalytic converter of the present invention includes a catalyst substrate, which is formed as a scroll-like cylindrical laminated assembly. The assembly is formed by laminating a thin corrugated and plain metal sheets and winding the metal sheets together around a center electrode. The outermost layer of the laminated assembly is connected to an outer electrode. The corrugated metal sheet has an insulating coating made of an alumina, and the plain metal sheet is uninsulated. Local conductive connections form between the thin metal sheets by soldering strips of zirconium solder foils between the layers of the thin metal sheets. Since zirconium has a larger reducing capability than aluminum, the alumina in the insulating coating is reduced by zirconium and precipitates at the local conductive connections. Therefore, the plain and corrugated metal sheet are electrically connected to each other at the local conductive connections.

Abstract: An exhaust gas purifying catalyst is characterized in that at least one kind of catalyst metal is loaded on a layered porous silica or a layered porous silica-metal oxide. The exhaust gas purifying catalyst is used as an oxidation catalyst for purifying hydrocarbon and carbon monoxide, or a reduction catalyst for purifying nitrogen oxides (NO.sub.x), which is suitable for purifying exhaust gases in automobiles. An exhaust gas purifying apparatus includes the above exhaust gas purifying catalyst and an absorbent for trapping hydrocarbon components, in which aromatic HC such as trimethylbenzene and the like are effectively trapped.